# Makefile for the Alchemy Au1000 CPU, generic files.
#
-obj-y += prom.o int-handler.o irq.o puts.o time.o reset.o \
+obj-y += prom.o irq.o puts.o time.o reset.o \
au1xxx_irqmap.o clocks.o platform.o power.o setup.o \
sleeper.o cputable.o dma.o dbdma.o gpio.o
+++ /dev/null
-/*
- * Copyright 2001 MontaVista Software Inc.
- * Author: ppopov@mvista.com
- *
- * Interrupt dispatcher for Au1000 boards.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/addrspace.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-
- .text
- .set macro
- .set noat
- .align 5
-
-NESTED(au1000_IRQ, PT_SIZE, sp)
- SAVE_ALL
- CLI # Important: mark KERNEL mode !
-
- mfc0 t0,CP0_CAUSE # get pending interrupts
- mfc0 t1,CP0_STATUS # get enabled interrupts
- and t0,t1 # isolate allowed ones
-
- andi t0,0xff00 # isolate pending bits
- beqz t0, 3f # spurious interrupt
-
- andi a0, t0, CAUSEF_IP7
- beq a0, zero, 1f
- move a0, sp
- jal mips_timer_interrupt
- j ret_from_irq
-
-1:
- andi a0, t0, CAUSEF_IP2 # Interrupt Controller 0, Request 0
- beq a0, zero, 2f
- move a0,sp
- jal intc0_req0_irqdispatch
- j ret_from_irq
-2:
- andi a0, t0, CAUSEF_IP3 # Interrupt Controller 0, Request 1
- beq a0, zero, 3f
- move a0,sp
- jal intc0_req1_irqdispatch
- j ret_from_irq
-3:
- andi a0, t0, CAUSEF_IP4 # Interrupt Controller 1, Request 0
- beq a0, zero, 4f
- move a0,sp
- jal intc1_req0_irqdispatch
- j ret_from_irq
-4:
- andi a0, t0, CAUSEF_IP5 # Interrupt Controller 1, Request 1
- beq a0, zero, 5f
- move a0, sp
- jal intc1_req1_irqdispatch
- j ret_from_irq
-
-5:
- move a0, sp
- jal spurious_interrupt
- j ret_from_irq
-END(au1000_IRQ)
#define EXT_INTC1_REQ1 5 /* IP 5 */
#define MIPS_TIMER_IP 7 /* IP 7 */
-extern asmlinkage void au1000_IRQ(void);
extern void set_debug_traps(void);
extern irq_cpustat_t irq_stat [NR_CPUS];
extern int au1xxx_ic0_nr_irqs;
cp0_status = read_c0_status();
- set_except_vector(0, au1000_IRQ);
/* Initialize interrupt controllers to a safe state.
*/
au_writel(sleep_intctl_mask[0], IC0_MASKSET); au_sync();
}
#endif /* CONFIG_PM */
+
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM;
+
+ if (pending & CAUSEF_IP7)
+ mips_timer_interrupt(regs);
+ else if (pending & CAUSEF_IP2)
+ intc0_req0_irqdispatch(regs);
+ else if (pending & CAUSEF_IP3)
+ intc0_req1_irqdispatch(regs);
+ else if (pending & CAUSEF_IP4)
+ intc1_req0_irqdispatch(regs);
+ else if (pending & CAUSEF_IP5)
+ intc1_req1_irqdispatch(regs);
+ else
+ spurious_interrupt(regs);
+}
# Makefile for the Cobalt micro systems family specific parts of the kernel
#
-obj-y := irq.o int-handler.o reset.o setup.o
+obj-y := irq.o reset.o setup.o
obj-$(CONFIG_EARLY_PRINTK) += console.o
+++ /dev/null
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1995, 1996, 1997, 2003 by Ralf Baechle
- * Copyright (C) 2001, 2002, 2003 by Liam Davies (ldavies@agile.tv)
- */
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/mach-cobalt/cobalt.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-
- .text
- .align 5
- NESTED(cobalt_handle_int, PT_SIZE, sp)
- SAVE_ALL
- CLI
-
- PTR_LA ra, ret_from_irq
- move a0, sp
- j cobalt_irq
-
- END(cobalt_handle_int)
#include <asm/mach-cobalt/cobalt.h>
-extern void cobalt_handle_int(void);
-
/*
* We have two types of interrupts that we handle, ones that come in through
* the CPU interrupt lines, and ones that come in on the via chip. The CPU
do_IRQ(irq, regs);
}
-asmlinkage void cobalt_irq(struct pt_regs *regs)
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
unsigned pending;
*/
GALILEO_OUTL(0, GT_INTRMASK_OFS);
- set_except_vector(0, cobalt_handle_int);
-
init_i8259_irqs(); /* 0 ... 15 */
mips_cpu_irq_init(COBALT_CPU_IRQ); /* 16 ... 23 */
# under Linux.
#
-obj-y += setup.o irq.o int-handler.o nile4_pic.o
+obj-y += setup.o irq.o nile4_pic.o
EXTRA_AFLAGS := $(CFLAGS)
+++ /dev/null
-/*
- * arch/mips/ddb5074/int-handler.S -- NEC DDB Vrc-5074 interrupt handler
- *
- * Based on arch/mips/sgi/kernel/indyIRQ.S
- *
- * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
- *
- * Copyright (C) 2000 Geert Uytterhoeven <geert@sonycom.com>
- * Sony Software Development Center Europe (SDCE), Brussels
- */
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-
-/* A lot of complication here is taken away because:
- *
- * 1) We handle one interrupt and return, sitting in a loop and moving across
- * all the pending IRQ bits in the cause register is _NOT_ the answer, the
- * common case is one pending IRQ so optimize in that direction.
- *
- * 2) We need not check against bits in the status register IRQ mask, that
- * would make this routine slow as hell.
- *
- * 3) Linux only thinks in terms of all IRQs on or all IRQs off, nothing in
- * between like BSD spl() brain-damage.
- *
- * Furthermore, the IRQs on the INDY look basically (barring software IRQs
- * which we don't use at all) like:
- *
- * MIPS IRQ Source
- * -------- ------
- * 0 Software (ignored)
- * 1 Software (ignored)
- * 2 Local IRQ level zero
- * 3 Local IRQ level one
- * 4 8254 Timer zero
- * 5 8254 Timer one
- * 6 Bus Error
- * 7 R4k timer (what we use)
- *
- * We handle the IRQ according to _our_ priority which is:
- *
- * Highest ---- R4k Timer
- * Local IRQ zero
- * Local IRQ one
- * Bus Error
- * 8254 Timer zero
- * Lowest ---- 8254 Timer one
- *
- * then we just return, if multiple IRQs are pending then we will just take
- * another exception, big deal.
- */
-
- .text
- .set noreorder
- .set noat
- .align 5
- NESTED(ddbIRQ, PT_SIZE, sp)
- SAVE_ALL
- CLI
- .set at
- mfc0 s0, CP0_CAUSE # get irq mask
-
-#if 1
- mfc0 t2,CP0_STATUS # get enabled interrupts
- and s0,t2 # isolate allowed ones
-#endif
- /* First we check for r4k counter/timer IRQ. */
- andi a0, s0, CAUSEF_IP2 # delay slot, check local level zero
- beq a0, zero, 1f
- andi a0, s0, CAUSEF_IP3 # delay slot, check local level one
-
- /* Wheee, local level zero interrupt. */
- jal ddb_local0_irqdispatch
- move a0, sp # delay slot
-
- j ret_from_irq
- nop # delay slot
-
-1:
- beq a0, zero, 1f
- andi a0, s0, CAUSEF_IP6 # delay slot, check bus error
-
- /* Wheee, local level one interrupt. */
- move a0, sp
- jal ddb_local1_irqdispatch
- nop
-
- j ret_from_irq
- nop
-
-1:
- beq a0, zero, 1f
- nop
-
- /* Wheee, an asynchronous bus error... */
- move a0, sp
- jal ddb_buserror_irq
- nop
-
- j ret_from_irq
- nop
-
-1:
- /* Here by mistake? This is possible, what can happen
- * is that by the time we take the exception the IRQ
- * pin goes low, so just leave if this is the case.
- */
- andi a0, s0, (CAUSEF_IP4 | CAUSEF_IP5)
- beq a0, zero, 1f
-
- /* Must be one of the 8254 timers... */
- move a0, sp
- jal ddb_8254timer_irq
- nop
-1:
- j ret_from_irq
- nop
- END(ddbIRQ)
#include <asm/ddb5xxx/ddb5074.h>
-extern asmlinkage void ddbIRQ(void);
-
static struct irqaction irq_cascade = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL };
#define M1543_PNP_CONFIG 0x03f0 /* PnP Config Port */
}
-void ddb_local0_irqdispatch(struct pt_regs *regs)
+static void ddb_local0_irqdispatch(struct pt_regs *regs)
{
u32 mask;
int nile4_irq;
}
}
-void ddb_local1_irqdispatch(void)
+static void ddb_local1_irqdispatch(void)
{
printk("ddb_local1_irqdispatch called\n");
}
-void ddb_buserror_irq(void)
+static void ddb_buserror_irq(void)
{
printk("ddb_buserror_irq called\n");
}
-void ddb_8254timer_irq(void)
+static void ddb_8254timer_irq(void)
{
printk("ddb_8254timer_irq called\n");
}
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int pending = read_c0_cause() & read_c0_status();
+
+ if (pending & CAUSEF_IP2)
+ ddb_local0_irqdispatch(regs);
+ else if (pending & CAUSEF_IP3)
+ ddb_local1_irqdispatch();
+ else if (pending & CAUSEF_IP6)
+ ddb_buserror_irq();
+ else if (pending & (CAUSEF_IP4 | CAUSEF_IP5))
+ ddb_8254timer_irq();
+}
+
void __init arch_init_irq(void)
{
/* setup cascade interrupts */
setup_irq(NILE4_IRQ_BASE + NILE4_INT_INTE, &irq_cascade);
setup_irq(CPU_IRQ_BASE + CPU_NILE4_CASCADE, &irq_cascade);
- set_except_vector(0, ddbIRQ);
-
nile4_irq_setup(NILE4_IRQ_BASE);
m1543_irq_setup();
init_i8259_irqs();
# under Linux.
#
-obj-y += setup.o irq.o int-handler.o nile4_pic.o vrc5476_irq.o
+obj-y += setup.o irq.o nile4_pic.o vrc5476_irq.o
obj-$(CONFIG_KGDB) += dbg_io.o
EXTRA_AFLAGS := $(CFLAGS)
+++ /dev/null
-/*
- * Copyright 2001 MontaVista Software Inc.
- * Author: jsun@mvista.com or jsun@junsun.net
- *
- * First-level interrupt dispatcher for ddb5476
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/addrspace.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-
-#include <asm/ddb5xxx/ddb5476.h>
-
-/*
- * first level interrupt dispatcher for ocelot board -
- * We check for the timer first, then check PCI ints A and D.
- * Then check for serial IRQ and fall through.
- */
- .align 5
- NESTED(ddb5476_handle_int, PT_SIZE, sp)
- SAVE_ALL
- CLI
- .set at
- .set noreorder
- mfc0 t0, CP0_CAUSE
- mfc0 t2, CP0_STATUS
-
- and t0, t2
-
- andi t1, t0, STATUSF_IP7 /* cpu timer */
- bnez t1, ll_cpu_ip7
- andi t1, t0, STATUSF_IP2 /* vrc5476 & i8259 */
- bnez t1, ll_cpu_ip2
- andi t1, t0, STATUSF_IP3
- bnez t1, ll_cpu_ip3
- andi t1, t0, STATUSF_IP4
- bnez t1, ll_cpu_ip4
- andi t1, t0, STATUSF_IP5
- bnez t1, ll_cpu_ip5
- andi t1, t0, STATUSF_IP6
- bnez t1, ll_cpu_ip6
- andi t1, t0, STATUSF_IP0 /* software int 0 */
- bnez t1, ll_cpu_ip0
- andi t1, t0, STATUSF_IP1 /* software int 1 */
- bnez t1, ll_cpu_ip1
- nop
-
- .set reorder
-
- /* wrong alarm or masked ... */
- // jal spurious_interrupt
- // j ret_from_irq
- move a0, sp
- jal vrc5476_irq_dispatch
- j ret_from_irq
- nop
-
- .align 5
-
-ll_cpu_ip0:
- li a0, CPU_IRQ_BASE + 0
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_cpu_ip1:
- li a0, CPU_IRQ_BASE + 1
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_cpu_ip2: /* jump to second-level dispatching */
- move a0, sp
- jal vrc5476_irq_dispatch
- j ret_from_irq
-
-ll_cpu_ip3:
- li a0, CPU_IRQ_BASE + 3
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_cpu_ip4:
- li a0, CPU_IRQ_BASE + 4
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_cpu_ip5:
- li a0, CPU_IRQ_BASE + 5
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_cpu_ip6:
- li a0, CPU_IRQ_BASE + 6
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_cpu_ip7:
- li a0, CPU_IRQ_BASE + 7
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
- END(ddb5476_handle_int)
static struct irqaction irq_cascade = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL };
static struct irqaction irq_error = { no_action, 0, CPU_MASK_NONE, "error", NULL, NULL };
-extern asmlinkage void ddb5476_handle_int(void);
extern int setup_irq(unsigned int irq, struct irqaction *irqaction);
extern void mips_cpu_irq_init(u32 irq_base);
extern void vrc5476_irq_init(u32 irq_base);
+extern void vrc5476_irq_dispatch(struct pt_regs *regs);
+
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int pending = read_c0_cause() & read_c0_status();
+
+ if (pending & STATUSF_IP7)
+ do_IRQ(CPU_IRQ_BASE + 7, regs);
+ else if (pending & STATUSF_IP2)
+ vrc5476_irq_dispatch(regs);
+ else if (pending & STATUSF_IP3)
+ do_IRQ(CPU_IRQ_BASE + 3, regs);
+ else if (pending & STATUSF_IP4)
+ do_IRQ(CPU_IRQ_BASE + 4, regs);
+ else if (pending & STATUSF_IP5)
+ do_IRQ(CPU_IRQ_BASE + 5, regs);
+ else if (pending & STATUSF_IP6)
+ do_IRQ(CPU_IRQ_BASE + 6, regs);
+ else if (pending & STATUSF_IP0)
+ do_IRQ(CPU_IRQ_BASE, regs);
+ else if (pending & STATUSF_IP1)
+ do_IRQ(CPU_IRQ_BASE + 1, regs);
+
+ vrc5476_irq_dispatch(regs);
+}
+
void __init arch_init_irq(void)
{
/* hardware initialization */
setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_LBRT, &irq_error);
setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_PCIS, &irq_error);
setup_irq(VRC5476_IRQ_BASE + VRC5476_IRQ_PCI, &irq_error);
-
- /* setup the grandpa intr vector */
- set_except_vector(0, ddb5476_handle_int);
}
}
-asmlinkage void
+void
vrc5476_irq_dispatch(struct pt_regs *regs)
{
u32 mask;
# Makefile for NEC DDB-Vrc5477 board
#
-obj-y += int-handler.o irq.o irq_5477.o setup.o lcd44780.o
+obj-y += irq.o irq_5477.o setup.o lcd44780.o
obj-$(CONFIG_RUNTIME_DEBUG) += debug.o
obj-$(CONFIG_KGDB) += kgdb_io.o
+++ /dev/null
-/*
- * Copyright 2001 MontaVista Software Inc.
- * Author: jsun@mvista.com or jsun@junsun.net
- *
- * First-level interrupt dispatcher for ddb5477
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/addrspace.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-#include <asm/ddb5xxx/ddb5477.h>
-
-/*
- * first level interrupt dispatcher for ocelot board -
- * We check for the timer first, then check PCI ints A and D.
- * Then check for serial IRQ and fall through.
- */
- .align 5
- NESTED(ddb5477_handle_int, PT_SIZE, sp)
- SAVE_ALL
- CLI
- .set at
- .set noreorder
- mfc0 t0, CP0_CAUSE
- mfc0 t2, CP0_STATUS
-
- and t0, t2
-
- andi t1, t0, STATUSF_IP7 /* cpu timer */
- bnez t1, ll_cputimer_irq
- andi t1, t0, (STATUSF_IP2 | STATUSF_IP3 | STATUSF_IP4 | STATUSF_IP5 | STATUSF_IP6 )
- bnez t1, ll_vrc5477_irq
- andi t1, t0, STATUSF_IP0 /* software int 0 */
- bnez t1, ll_cpu_ip0
- andi t1, t0, STATUSF_IP1 /* software int 1 */
- bnez t1, ll_cpu_ip1
- nop
- .set reorder
-
- /* wrong alarm or masked ... */
- jal spurious_interrupt
- j ret_from_irq
- END(ddb5477_handle_int)
-
- .align 5
-
-ll_vrc5477_irq:
- move a0, sp
- jal vrc5477_irq_dispatch
- j ret_from_irq
-
-ll_cputimer_irq:
- li a0, CPU_IRQ_BASE + 7
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-
-ll_cpu_ip0:
- li a0, CPU_IRQ_BASE + 0
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_cpu_ip1:
- li a0, CPU_IRQ_BASE + 1
- move a1, sp
- jal do_IRQ
- j ret_from_irq
extern void vrc5477_irq_init(u32 base);
extern void mips_cpu_irq_init(u32 base);
-extern asmlinkage void ddb5477_handle_int(void);
extern int setup_irq(unsigned int irq, struct irqaction *irqaction);
static struct irqaction irq_cascade = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL };
/* setup cascade interrupts */
setup_irq(VRC5477_IRQ_BASE + VRC5477_I8259_CASCADE, &irq_cascade);
setup_irq(CPU_IRQ_BASE + CPU_VRC5477_CASCADE, &irq_cascade);
-
- /* hook up the first-level interrupt handler */
- set_except_vector(0, ddb5477_handle_int);
}
u8 i8259_interrupt_ack(void)
* the first level int-handler will jump here if it is a vrc5477 irq
*/
#define NUM_5477_IRQS 32
-asmlinkage void
+static void
vrc5477_irq_dispatch(struct pt_regs *regs)
{
u32 intStatus;
}
}
}
+
+#define VR5477INTS (STATUSF_IP2|STATUSF_IP3|STATUSF_IP4|STATUSF_IP5|STATUSF_IP6)
+
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int pending = read_c0_cause() & read_c0_status();
+
+ if (pending & STATUSF_IP7)
+ do_IRQ(CPU_IRQ_BASE + 7, regs);
+ else if (pending & VR5477INTS)
+ vrc5477_irq_dispatch(regs);
+ else if (pending & STATUSF_IP0)
+ do_IRQ(CPU_IRQ_BASE, regs);
+ else if (pending & STATUSF_IP1)
+ do_IRQ(CPU_IRQ_BASE + 1, regs);
+ else
+ spurious_interrupt(regs);
+}
.text
.set noreorder
/*
- * decstation_handle_int: Interrupt handler for DECstations
+ * plat_irq_dispatch: Interrupt handler for DECstations
*
* We follow the model in the Indy interrupt code by David Miller, where he
* says: a lot of complication here is taken away because:
* just take another exception, big deal.
*/
.align 5
- NESTED(decstation_handle_int, PT_SIZE, ra)
- .set noat
- SAVE_ALL
- CLI # TEST: interrupts should be off
- .set at
+ NESTED(plat_irq_dispatch, PT_SIZE, ra)
.set noreorder
/*
nop
j ret_from_irq
nop
- END(decstation_handle_int)
+ END(plat_irq_dispatch)
/*
* Generic unimplemented interrupt routines -- cpu_mask_nr_tbl
extern void dec_machine_power_off(void);
extern irqreturn_t dec_intr_halt(int irq, void *dev_id, struct pt_regs *regs);
-extern asmlinkage void decstation_handle_int(void);
-
unsigned long dec_kn_slot_base, dec_kn_slot_size;
EXPORT_SYMBOL(dec_kn_slot_base);
panic("Don't know how to set this up!");
break;
}
- set_except_vector(0, decstation_handle_int);
/* Free the FPU interrupt if the exception is present. */
if (!cpu_has_nofpuex) {
# Makefile for the Galileo EV96100 board.
#
-obj-y += init.o irq.o puts.o reset.o time.o int-handler.o setup.o
+obj-y += init.o irq.o puts.o reset.o time.o setup.o
+++ /dev/null
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-
- .set noat
- .align 5
-
-NESTED(ev96100IRQ, PT_SIZE, sp)
- SAVE_ALL
- CLI # Important: mark KERNEL mode !
-
- mfc0 t0, CP0_CAUSE # get pending interrupts
- mfc0 t1, CP0_STATUS # get enabled interrupts
- and t0, t1 # isolate allowed ones
-
- # FIX ME add R7000 extensions
- andi t0,0xff00 # isolate pending bits
- andi a0, t0, CAUSEF_IP7
- beq a0, zero, 1f
- move a0, sp
- jal mips_timer_interrupt
- j ret_from_irq
-
-1: beqz t0, 3f # spurious interrupt
-
- move a0, t0
- move a1, sp
- jal ev96100_cpu_irq
- j ret_from_irq
-
-3: jal spurious_interrupt
- j ret_from_irq
- END(ev96100IRQ)
#include <linux/interrupt.h>
#include <asm/irq_cpu.h>
-extern asmlinkage void ev96100IRQ(void);
-
static inline unsigned int ffz8(unsigned int word)
{
unsigned long k;
return k;
}
+extern void mips_timer_interrupt(struct pt_regs *regs);
+
asmlinkage void ev96100_cpu_irq(unsigned int pending, struct pt_regs *regs)
{
do_IRQ(ffz8(pending >> 8), regs);
}
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
+
+ if (pending & CAUSEF_IP7)
+ mips_timer_interrupt(regs);
+ else if (pending)
+ ev96100_cpu_irq(pending, regs);
+ else
+ spurious_interrupt(regs);
+}
+
void __init arch_init_irq(void)
{
- set_except_vector(0, ev96100IRQ);
mips_cpu_irq_init(0);
}
# Makefile for the Galileo EV64120 board.
#
-obj-y += int-handler.o irq.o promcon.o reset.o serialGT.o setup.o
+obj-y += irq.o promcon.o reset.o serialGT.o setup.o
EXTRA_AFLAGS := $(CFLAGS)
+++ /dev/null
-/*
- * int-handler.S
- *
- * Based on the cobalt handler.
- */
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/addrspace.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-
-/*
- * galileo_handle_int -
- * We check for the timer first, then check PCI ints A and D.
- * Then check for serial IRQ and fall through.
- */
- .align 5
- .set reorder
- .set noat
- NESTED(galileo_handle_int, PT_SIZE, sp)
- SAVE_ALL
- CLI
- .set at
- mfc0 t0,CP0_CAUSE
- mfc0 t2,CP0_STATUS
-
- and t0,t2
-
- andi t1,t0,STATUSF_IP4 /* int2 hardware line (timer) */
- bnez t1,ll_gt64120_irq
- andi t1,t0,STATUSF_IP2 /* int0 hardware line */
- bnez t1,ll_pci_intA
- andi t1,t0,STATUSF_IP5 /* int3 hardware line */
- bnez t1,ll_pci_intD
- andi t1,t0,STATUSF_IP6 /* int4 hardware line */
- bnez t1,ll_serial_irq
- andi t1,t0,STATUSF_IP7 /* compare int */
- bnez t1,ll_compare_irq
- nop
-
- /* wrong alarm or masked ... */
- jal spurious_interrupt
- nop
- j ret_from_irq
- END(galileo_handle_int)
-
-
- .align 5
- .set reorder
-ll_gt64120_irq:
- li a0,4
- move a1,sp
- jal do_IRQ
- nop
- j ret_from_irq
- nop
-
- .align 5
- .set reorder
-ll_compare_irq:
- li a0,7
- move a1,sp
- jal do_IRQ
- nop
- j ret_from_irq
- nop
-
- .align 5
- .set reorder
-ll_pci_intA:
- move a0,sp
- jal pci_intA
- nop
- j ret_from_irq
- nop
-
-#if 0
- .align 5
- .set reorder
-ll_pci_intB:
- move a0,sp
- jal pci_intB
- nop
- j ret_from_irq
- nop
-
- .align 5
- .set reorder
-ll_pci_intC:
- move a0,sp
- jal pci_intC
- nop
- j ret_from_irq
- nop
-#endif
-
- .align 5
- .set reorder
-ll_pci_intD:
- move a0,sp
- jal pci_intD
- nop
- j ret_from_irq
- nop
-
- .align 5
- .set reorder
-ll_serial_irq:
- li a0,6
- move a1,sp
- jal do_IRQ
- nop
- j ret_from_irq
- nop
#include <asm/system.h>
#include <asm/gt64120.h>
-asmlinkage inline void pci_intA(struct pt_regs *regs)
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
- do_IRQ(GT_INTA, regs);
-}
-
-asmlinkage inline void pci_intD(struct pt_regs *regs)
-{
- do_IRQ(GT_INTD, regs);
+ unsigned int pending = read_c0_status() & read_c0_cause();
+
+ if (pending & STATUSF_IP4) /* int2 hardware line (timer) */
+ do_IRQ(4, regs);
+ else if (pending & STATUSF_IP2) /* int0 hardware line */
+ do_IRQ(GT_INTA, regs);
+ else if (pending & STATUSF_IP5) /* int3 hardware line */
+ do_IRQ(GT_INTD, regs);
+ else if (pending & STATUSF_IP6) /* int4 hardware line */
+ do_IRQ(6, regs);
+ else if (pending & STATUSF_IP7) /* compare int */
+ do_IRQ(7, regs);
+ else
+ spurious_interrupt(regs);
}
static void disable_ev64120_irq(unsigned int irq_nr)
void gt64120_irq_setup(void)
{
- extern asmlinkage void galileo_handle_int(void);
-
/*
* Clear all of the interrupts while we change the able around a bit.
*/
clear_c0_status(ST0_IM);
- /* Sets the exception_handler array. */
- set_except_vector(0, galileo_handle_int);
-
local_irq_disable();
/*
# Makefile for Momentum's Ocelot board.
#
-obj-y += int-handler.o irq.o prom.o reset.o setup.o
+obj-y += irq.o prom.o reset.o setup.o
obj-$(CONFIG_KGDB) += dbg_io.o
+++ /dev/null
-/*
- * Copyright 2001 MontaVista Software Inc.
- * Author: jsun@mvista.com or jsun@junsun.net
- *
- * First-level interrupt dispatcher for ocelot board.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/addrspace.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-
-/*
- * first level interrupt dispatcher for ocelot board -
- * We check for the timer first, then check PCI ints A and D.
- * Then check for serial IRQ and fall through.
- */
- .align 5
- NESTED(ocelot_handle_int, PT_SIZE, sp)
- SAVE_ALL
- CLI
- .set at
- mfc0 t0, CP0_CAUSE
- mfc0 t2, CP0_STATUS
-
- and t0, t2
-
- andi t1, t0, STATUSF_IP2 /* int0 hardware line */
- bnez t1, ll_pri_enet_irq
- andi t1, t0, STATUSF_IP3 /* int1 hardware line */
- bnez t1, ll_sec_enet_irq
- andi t1, t0, STATUSF_IP4 /* int2 hardware line */
- bnez t1, ll_uart1_irq
- andi t1, t0, STATUSF_IP5 /* int3 hardware line */
- bnez t1, ll_cpci_irq
- andi t1, t0, STATUSF_IP6 /* int4 hardware line */
- bnez t1, ll_galileo_irq
- andi t1, t0, STATUSF_IP7 /* cpu timer */
- bnez t1, ll_cputimer_irq
-
- /* now look at the extended interrupts */
- mfc0 t0, CP0_CAUSE
- cfc0 t1, CP0_S1_INTCONTROL
-
- /* shift the mask 8 bits left to line up the bits */
- sll t2, t1, 8
-
- and t0, t2
- srl t0, t0, 16
-
- andi t1, t0, STATUSF_IP8 /* int6 hardware line */
- bnez t1, ll_pmc1_irq
- andi t1, t0, STATUSF_IP9 /* int7 hardware line */
- bnez t1, ll_pmc2_irq
- andi t1, t0, STATUSF_IP10 /* int8 hardware line */
- bnez t1, ll_cpci_abcd_irq
- andi t1, t0, STATUSF_IP11 /* int9 hardware line */
- bnez t1, ll_uart2_irq
-
- .set reorder
-
- /* wrong alarm or masked ... */
- j spurious_interrupt
- nop
- END(ocelot_handle_int)
-
- .align 5
-ll_pri_enet_irq:
- li a0, 2
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_sec_enet_irq:
- li a0, 3
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_uart1_irq:
- li a0, 4
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_cpci_irq:
- li a0, 5
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_galileo_irq:
- li a0, 6
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_cputimer_irq:
- li a0, 7
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_pmc1_irq:
- li a0, 8
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_pmc2_irq:
- li a0, 9
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_cpci_abcd_irq:
- li a0, 10
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_uart2_irq:
- li a0, 11
- move a1, sp
- jal do_IRQ
- j ret_from_irq
#include <asm/mipsregs.h>
#include <asm/system.h>
-extern asmlinkage void ocelot_handle_int(void);
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int pending = read_c0_status() & read_c0_cause();
+
+ if (pending & STATUSF_IP2) /* int0 hardware line */
+ do_IRQ(2, regs);
+ else if (pending & STATUSF_IP3) /* int1 hardware line */
+ do_IRQ(3, regs);
+ else if (pending & STATUSF_IP4) /* int2 hardware line */
+ do_IRQ(4, regs);
+ else if (pending & STATUSF_IP5) /* int3 hardware line */
+ do_IRQ(5, regs);
+ else if (pending & STATUSF_IP6) /* int4 hardware line */
+ do_IRQ(6, regs);
+ else if (pending & STATUSF_IP7) /* cpu timer */
+ do_IRQ(7, regs);
+ else {
+ /*
+ * Now look at the extended interrupts
+ */
+ pending = (read_c0_cause() & (read_c0_intcontrol() << 8)) >> 16;
+
+ if (pending & STATUSF_IP8) /* int6 hardware line */
+ do_IRQ(8, regs);
+ else if (pending & STATUSF_IP9) /* int7 hardware line */
+ do_IRQ(9, regs);
+ else if (pending & STATUSF_IP10) /* int8 hardware line */
+ do_IRQ(10, regs);
+ else if (pending & STATUSF_IP11) /* int9 hardware line */
+ do_IRQ(11, regs);
+ }
+}
void __init arch_init_irq(void)
{
clear_c0_status(ST0_IM);
local_irq_disable();
- /* Sets the first-level interrupt dispatcher. */
- set_except_vector(0, ocelot_handle_int);
-
mips_cpu_irq_init(0);
rm7k_cpu_irq_init(8);
}
# Makefile for the ITE 8172 (qed-4n-s01b) board, generic files.
#
-obj-y += it8172_setup.o irq.o int-handler.o pmon_prom.o \
+obj-y += it8172_setup.o irq.o pmon_prom.o \
time.o lpc.o puts.o reset.o
obj-$(CONFIG_IT8172_CIR)+= it8172_cir.o
+++ /dev/null
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-
- .text
- .set macro
- .set noat
- .align 5
-
-NESTED(it8172_IRQ, PT_SIZE, sp)
- SAVE_ALL
- CLI # Important: mark KERNEL mode !
-
- /* We're working with 'reorder' set at this point. */
- /*
- * Get pending interrupts
- */
-
- mfc0 t0,CP0_CAUSE # get pending interrupts
- mfc0 t1,CP0_STATUS # get enabled interrupts
- and t0,t1 # isolate allowed ones
-
- andi t0,0xff00 # isolate pending bits
- beqz t0, 3f # spurious interrupt
-
- andi a0, t0, CAUSEF_IP7
- beq a0, zero, 1f
-
- li a0, 127 # MIPS_CPU_TIMER_IRQ = (NR_IRQS-1)
- move a1, sp
- jal ll_timer_interrupt
- j ret_from_irq
- nop
-
-1:
- andi a0, t0, CAUSEF_IP2 # the only int we expect at this time
- beq a0, zero, 3f
- move a0,sp
- jal it8172_hw0_irqdispatch
-
- mfc0 t0,CP0_STATUS # disable interrupts
- ori t0,1
- xori t0,1
- mtc0 t0,CP0_STATUS
- nop
- nop
- nop
-
- la a1, ret_from_irq
- jr a1
- nop
-
-3:
- move a0, sp
- jal mips_spurious_interrupt
- nop
- la a1, ret_from_irq
- jr a1
- nop
-
-END(it8172_IRQ)
-
extern void set_debug_traps(void);
extern void mips_timer_interrupt(int irq, struct pt_regs *regs);
-extern asmlinkage void it8172_IRQ(void);
struct it8172_intc_regs volatile *it8172_hw0_icregs =
(struct it8172_intc_regs volatile *)(KSEG1ADDR(IT8172_PCI_IO_BASE + IT_INTC_BASE));
int i;
unsigned long flags;
- set_except_vector(0, it8172_IRQ);
-
/* mask all interrupts */
it8172_hw0_icregs->lb_mask = 0xffff;
it8172_hw0_icregs->lpc_mask = 0xffff;
do_IRQ(irq, regs);
}
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
+
+ if (!pending)
+ mips_spurious_interrupt(regs);
+ else if (pending & CAUSEF_IP7)
+ ll_timer_interrupt(127, regs);
+ else if (pending & CAUSEF_IP2)
+ it8172_hw0_irqdispatch(regs);
+}
+
void show_pending_irqs(void)
{
fputs("intstatus: ");
# Makefile for the Jazz family specific parts of the kernel
#
-obj-y := int-handler.o irq.o jazzdma.o reset.o setup.o
+obj-y := irq.o jazzdma.o reset.o setup.o
EXTRA_AFLAGS := $(CFLAGS)
+++ /dev/null
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1995, 1996, 1997, 1998 by Ralf Baechle and Andreas Busse
- *
- * Jazz family specific interrupt stuff
- *
- * To do: On Jazz machines we remap some non-ISA interrupts to ISA
- * interrupts. These interrupts should use their own vectors.
- * Squeeze the last cycles out of the handlers. Only a dead
- * cycle is a good cycle.
- */
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/jazz.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-
-/*
- * jazz_handle_int: Interrupt handler for the ACER Pica-61 boards
- */
- .set noreorder
-
- NESTED(jazz_handle_int, PT_SIZE, ra)
- .set noat
- SAVE_ALL
- CLI
- .set at
-
- /*
- * Get pending interrupts
- */
- mfc0 t0,CP0_CAUSE # get pending interrupts
- mfc0 t1,CP0_STATUS # get enabled interrupts
- and t0,t1 # isolate allowed ones
- andi t0,0xff00 # isolate pending bits
- beqz t0,3f
- sll t0,16 # delay slot
-
- /*
- * Find irq with highest priority
- * FIXME: This is slow - use binary search
- */
- la t1,ll_vectors
-1: bltz t0,2f # found pending irq
- sll t0,1
- b 1b
- subu t1,PTRSIZE # delay slot
-
- /*
- * Do the low-level stuff
- */
-2: lw t0,(t1)
- jr t0
- nop # delay slot
- END(jazz_handle_int)
-
-ll_sw0: li s1,~IE_SW0
- mfc0 t0,CP0_CAUSE
- and t0,s1
- mtc0 t0,CP0_CAUSE
- PANIC("Unimplemented sw0 handler")
-
-ll_sw1: li s1,~IE_SW1
- mfc0 t0,CP0_CAUSE
- and t0,s1
- mtc0 t0,CP0_CAUSE
- PANIC("Unimplemented sw1 handler")
-
-ll_local_dma: li s1,~IE_IRQ0
- PANIC("Unimplemented local_dma handler")
-
-ll_local_dev: lbu t0,JAZZ_IO_IRQ_SOURCE
-#if PTRSIZE == 8 /* True 64 bit kernel */
- dsll t0,1
-#endif
- .set reorder
- LONG_L t0,local_vector(t0)
- jr t0
- .set noreorder
-
-/*
- * The braindead PICA hardware gives us no way to distinguish if we really
- * received interrupt 7 from the (E)ISA bus or if we just received an
- * interrupt with no findable cause. This sometimes happens with braindead
- * cards. Oh well - for all the Jazz boxes slots are more or less just
- * whistles and bells and we're aware of the problem.
- */
-ll_isa_irq: lw a0, JAZZ_EISA_IRQ_ACK
-
- jal do_IRQ
- move a1,sp
-
- j ret_from_irq
- nop
-
-/*
- * Hmm... This is not just a plain PC clone so the question is
- * which devices on Jazz machines can generate an (E)ISA NMI?
- * (Writing to nonexistent memory?)
- */
-ll_isa_nmi: li s1,~IE_IRQ3
- PANIC("Unimplemented isa_nmi handler")
-
-/*
- * Timer IRQ - remapped to be more similar to an IBM compatible.
- *
- * The timer interrupt is handled specially to ensure that the jiffies
- * variable is updated at all times. Specifically, the timer interrupt is
- * just like the complete handlers except that it is invoked with interrupts
- * disabled and should never re-enable them. If other interrupts were
- * allowed to be processed while the timer interrupt is active, then the
- * other interrupts would have to avoid using the jiffies variable for delay
- * and interval timing operations to avoid hanging the system.
- */
-ll_timer: lw zero,JAZZ_TIMER_REGISTER # timer irq cleared on read
- li s1,~IE_IRQ4
-
- li a0, JAZZ_TIMER_IRQ
- jal do_IRQ
- move a1,sp
-
- mfc0 t0,CP0_STATUS # disable interrupts again
- ori t0,1
- xori t0,1
- mtc0 t0,CP0_STATUS
-
- j ret_from_irq
- nop
-
-/*
- * CPU count/compare IRQ (unused)
- */
-ll_count: j ret_from_irq
- mtc0 zero,CP0_COMPARE
-
-#if 0
-/*
- * Call the handler for the interrupt
- * (Currently unused)
- */
-call_real: /*
- * temporarily disable interrupt
- */
- mfc0 t2,CP0_STATUS
- and t2,s1
- mtc0 t2,CP0_STATUS
- nor s1,zero,s1
- jal do_IRQ
-
- /*
- * reenable interrupt
- */
- mfc0 t2,CP0_STATUS
- or t2,s1
- mtc0 t2,CP0_STATUS
- j ret_from_irq
-#endif
-
- .data
- PTR ll_sw0 # SW0
- PTR ll_sw1 # SW1
- PTR ll_local_dma # Local DMA
- PTR ll_local_dev # Local devices
- PTR ll_isa_irq # ISA IRQ
- PTR ll_isa_nmi # ISA NMI
- PTR ll_timer # Timer
-ll_vectors: PTR ll_count # Count/Compare IRQ
-
- /*
- * Interrupt handlers for local devices.
- */
- .text
- .set reorder
-loc_no_irq: PANIC("Unimplemented loc_no_irq handler")
-/*
- * Parallel port IRQ
- */
-loc_parallel: li s1,~JAZZ_IE_PARALLEL
- li a0,JAZZ_PARALLEL_IRQ
- b loc_call
-
-/*
- * Floppy IRQ
- */
-loc_floppy: li s1,~JAZZ_IE_FLOPPY
- li a0,JAZZ_FLOPPY_IRQ
- b loc_call
-
-/*
- * Sound IRQ
- */
-loc_sound: PANIC("Unimplemented loc_sound handler")
-loc_video: PANIC("Unimplemented loc_video handler")
-
-/*
- * Ethernet interrupt handler
- */
-loc_ethernet: li s1,~JAZZ_IE_ETHERNET
- li a0,JAZZ_ETHERNET_IRQ
- b loc_call
-
-/*
- * SCSI interrupt handler
- */
-loc_scsi: li s1,~JAZZ_IE_SCSI
- li a0,JAZZ_SCSI_IRQ
- b loc_call
-
-/*
- * Keyboard interrupt handler
- */
-loc_keyboard: li s1,~JAZZ_IE_KEYBOARD
- li a0,JAZZ_KEYBOARD_IRQ
- b loc_call
-
-/*
- * Mouse interrupt handler
- */
-loc_mouse: li s1,~JAZZ_IE_MOUSE
- li a0,JAZZ_MOUSE_IRQ
- b loc_call
-
-/*
- * Serial port 1 IRQ
- */
-loc_serial1: li s1,~JAZZ_IE_SERIAL1
- li a0,JAZZ_SERIAL1_IRQ
- b loc_call
-
-/*
- * Serial port 2 IRQ
- */
-loc_serial2: li s1,~JAZZ_IE_SERIAL2
- li a0,JAZZ_SERIAL2_IRQ
- b loc_call
-
-/*
- * Call the interrupt handler for an interrupt generated by a
- * local device.
- */
-loc_call: /*
- * Temporarily disable interrupt source
- */
- lhu t2,JAZZ_IO_IRQ_ENABLE
- and t2,s1
- sh t2,JAZZ_IO_IRQ_ENABLE
-
- nor s1,zero,s1
- jal do_IRQ
-
- /*
- * Reenable interrupt
- */
- lhu t2,JAZZ_IO_IRQ_ENABLE
- or t2,s1
- sh t2,JAZZ_IO_IRQ_ENABLE
-
- j ret_from_irq
-
-/*
- * "Jump extender" to reach spurious_interrupt
- */
-3: jal spurious_interrupt
- j ret_from_irq
-
-/*
- * Vectors for interrupts generated by local devices
- */
- .data
-local_vector: PTR loc_no_irq
- PTR loc_parallel
- PTR loc_floppy
- PTR loc_sound
- PTR loc_video
- PTR loc_ethernet
- PTR loc_scsi
- PTR loc_keyboard
- PTR loc_mouse
- PTR loc_serial1
- PTR loc_serial2
#include <asm/io.h>
#include <asm/jazz.h>
-extern asmlinkage void jazz_handle_int(void);
-
static DEFINE_SPINLOCK(r4030_lock);
static void enable_r4030_irq(unsigned int irq)
*/
void __init arch_init_irq(void)
{
- set_except_vector(0, jazz_handle_int);
-
init_i8259_irqs(); /* Integrated i8259 */
init_r4030_ints();
change_c0_status(ST0_IM, IE_IRQ4 | IE_IRQ3 | IE_IRQ2 | IE_IRQ1);
}
+
+static void loc_call(unsigned int irq, struct pt_regs *regs, unsigned int mask)
+{
+ r4030_write_reg16(JAZZ_IO_IRQ_ENABLE,
+ r4030_read_reg16(JAZZ_IO_IRQ_ENABLE) & mask);
+ do_IRQ(irq, regs);
+ r4030_write_reg16(JAZZ_IO_IRQ_ENABLE,
+ r4030_read_reg16(JAZZ_IO_IRQ_ENABLE) | mask);
+}
+
+static void ll_local_dev(struct pt_regs *regs)
+{
+ switch (r4030_read_reg32(JAZZ_IO_IRQ_SOURCE)) {
+ case 0:
+ panic("Unimplemented loc_no_irq handler");
+ break;
+ case 4:
+ loc_call(JAZZ_PARALLEL_IRQ, regs, JAZZ_IE_PARALLEL);
+ break;
+ case 8:
+ loc_call(JAZZ_PARALLEL_IRQ, regs, JAZZ_IE_FLOPPY);
+ break;
+ case 12:
+ panic("Unimplemented loc_sound handler");
+ break;
+ case 16:
+ panic("Unimplemented loc_video handler");
+ break;
+ case 20:
+ loc_call(JAZZ_ETHERNET_IRQ, regs, JAZZ_IE_ETHERNET);
+ break;
+ case 24:
+ loc_call(JAZZ_SCSI_IRQ, regs, JAZZ_IE_SCSI);
+ break;
+ case 28:
+ loc_call(JAZZ_KEYBOARD_IRQ, regs, JAZZ_IE_KEYBOARD);
+ break;
+ case 32:
+ loc_call(JAZZ_MOUSE_IRQ, regs, JAZZ_IE_MOUSE);
+ break;
+ case 36:
+ loc_call(JAZZ_SERIAL1_IRQ, regs, JAZZ_IE_SERIAL1);
+ break;
+ case 40:
+ loc_call(JAZZ_SERIAL2_IRQ, regs, JAZZ_IE_SERIAL2);
+ break;
+ }
+}
+
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
+
+ if (pending & IE_IRQ5)
+ write_c0_compare(0);
+ else if (pending & IE_IRQ4) {
+ r4030_read_reg32(JAZZ_TIMER_REGISTER);
+ do_IRQ(JAZZ_TIMER_IRQ, regs);
+ } else if (pending & IE_IRQ3)
+ panic("Unimplemented ISA NMI handler");
+ else if (pending & IE_IRQ2)
+ do_IRQ(r4030_read_reg32(JAZZ_EISA_IRQ_ACK), regs);
+ else if (pending & IE_IRQ1) {
+ ll_local_dev(regs);
+ } else if (unlikely(pending & IE_IRQ0))
+ panic("Unimplemented local_dma handler");
+ else if (pending & IE_SW1) {
+ clear_c0_cause(IE_SW1);
+ panic("Unimplemented sw1 handler");
+ } else if (pending & IE_SW0) {
+ clear_c0_cause(IE_SW0);
+ panic("Unimplemented sw0 handler");
+ }
+}
# Makefile for TOSHIBA JMR-TX3927 board
#
-obj-y += init.o int-handler.o irq.o setup.o
+obj-y += init.o irq.o setup.o
obj-$(CONFIG_RUNTIME_DEBUG) += debug.o
obj-$(CONFIG_KGDB) += kgdb_io.o
+++ /dev/null
-/*
- * Copyright 2001 MontaVista Software Inc.
- * Author: MontaVista Software, Inc.
- * ahennessy@mvista.com
- *
- * Based on arch/mips/tsdb/kernel/int-handler.S
- *
- * Copyright (C) 2000-2001 Toshiba Corporation
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
- * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-#include <asm/jmr3927/jmr3927.h>
-
- /* A lot of complication here is taken away because:
- *
- * 1) We handle one interrupt and return, sitting in a loop
- * and moving across all the pending IRQ bits in the cause
- * register is _NOT_ the answer, the common case is one
- * pending IRQ so optimize in that direction.
- *
- * 2) We need not check against bits in the status register
- * IRQ mask, that would make this routine slow as hell.
- *
- * 3) Linux only thinks in terms of all IRQs on or all IRQs
- * off, nothing in between like BSD spl() brain-damage.
- *
- */
-
-/* Flush write buffer (needed?)
- * NOTE: TX39xx performs "non-blocking load", so explicitly use the target
- * register of LBU to flush immediately.
- */
-#define FLUSH_WB(tmp) \
- la tmp, JMR3927_IOC_REV_ADDR; \
- lbu tmp, (tmp); \
- move tmp, zero;
-
- .text
- .set noreorder
- .set noat
- .align 5
- NESTED(jmr3927_IRQ, PT_SIZE, sp)
- SAVE_ALL
- CLI
- .set at
- jal jmr3927_irc_irqdispatch
- move a0, sp
- FLUSH_WB(t0)
- j ret_from_irq
- nop
- END(jmr3927_IRQ)
}
#endif
-extern asmlinkage void jmr3927_IRQ(void);
-
#define irc_dlevel 0
#define irc_elevel 1
regs->cp0_cause, regs->cp0_epc, regs->regs[31]);
}
-void jmr3927_irc_irqdispatch(struct pt_regs *regs)
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
int irq;
jmr3927_irq_init(NR_ISA_IRQS);
- set_except_vector(0, jmr3927_IRQ);
-
/* setup irq space */
add_tb_irq_space(&jmr3927_isac_irqspace);
add_tb_irq_space(&jmr3927_ioc_irqspace);
.set pop
END(except_vec3_r4000)
+ __FINIT
+
+ .align 5
+NESTED(handle_int, PT_SIZE, sp)
+ SAVE_ALL
+ CLI
+
+ PTR_LA ra, ret_from_irq
+ move a0, sp
+ j plat_irq_dispatch
+ END(handle_int)
+
+ __INIT
+
/*
* Special interrupt vector for MIPS64 ISA & embedded MIPS processors.
* This is a dedicated interrupt exception vector which reduces the
#include <asm/watch.h>
#include <asm/types.h>
+extern asmlinkage void handle_int(void);
extern asmlinkage void handle_tlbm(void);
extern asmlinkage void handle_tlbl(void);
extern asmlinkage void handle_tlbs(void);
if (board_be_init)
board_be_init();
+ set_except_vector(0, handle_int);
set_except_vector(1, handle_tlbm);
set_except_vector(2, handle_tlbl);
set_except_vector(3, handle_tlbs);
#
obj-y += reset.o setup.o prom.o lasat_board.o \
- at93c.o interrupt.o lasatIRQ.o
+ at93c.o interrupt.o
obj-$(CONFIG_LASAT_SYSCTL) += sysctl.o
obj-$(CONFIG_DS1603) += ds1603.o
#include <asm/bootinfo.h>
#include <asm/irq.h>
#include <asm/lasat/lasatint.h>
+#include <asm/time.h>
#include <asm/gdb-stub.h>
static volatile int *lasat_int_status = NULL;
static volatile int *lasat_int_mask = NULL;
static volatile int lasat_int_mask_shift;
-extern asmlinkage void lasatIRQ(void);
-
void disable_lasat_irq(unsigned int irq_nr)
{
unsigned long flags;
return int_status;
}
-void lasat_hw0_irqdispatch(struct pt_regs *regs)
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
unsigned long int_status;
+ unsigned int cause = read_c0_cause();
int irq;
+ if (cause & CAUSEF_IP7) { /* R4000 count / compare IRQ */
+ ll_timer_interrupt(7, regs);
+ return;
+ }
+
int_status = get_int_status();
/* if int_status == 0, then the interrupt has already been cleared */
panic("arch_init_irq: mips_machtype incorrect");
}
- /* Now safe to set the exception vector. */
- set_except_vector(0, lasatIRQ);
-
for (i = 0; i <= LASATINT_END; i++) {
irq_desc[i].status = IRQ_DISABLED;
irq_desc[i].action = 0;
+++ /dev/null
-/*
- * Carsten Langgaard, carstenl@mips.com
- * Copyright (C) 1999, 2000 MIPS Technologies, Inc. All rights reserved.
- *
- * This program is free software; you can distribute it and/or modify it
- * under the terms of the GNU General Public License (Version 2) as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * Interrupt exception dispatch code.
- */
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-
- .text
- .set noreorder
- .align 5
- NESTED(lasatIRQ, PT_SIZE, sp)
- .set noat
- SAVE_ALL
- CLI
- .set at
- .set noreorder
-
- mfc0 s0, CP0_CAUSE # get irq mask
-
- /* First we check for r4k counter/timer IRQ. */
- andi a0, s0, CAUSEF_IP7
- beq a0, zero, 1f
- andi a0, s0, CAUSEF_IP2 # delay slot, check hw0 interrupt
-
- /* Wheee, a timer interrupt. */
- li a0, 7
- jal ll_timer_interrupt
- move a1, sp
-
- j ret_from_irq
- nop
-
-1:
- /* Wheee, combined hardware level zero interrupt. */
- jal lasat_hw0_irqdispatch
- move a0, sp # delay slot
-
- j ret_from_irq
- nop # delay slot
-
-1:
- /*
- * Here by mistake? This is possible, what can happen is that by the
- * time we take the exception the IRQ pin goes low, so just leave if
- * this is the case.
- */
- move a1,s0
- mfc0 a1, CP0_EPC
-
- j ret_from_irq
- nop
- END(lasatIRQ)
# 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
#
-obj-y := atlas_int.o atlas-irq.o atlas_setup.o
+obj-y := atlas_int.o atlas_setup.o
obj-$(CONFIG_KGDB) += atlas_gdb.o
+++ /dev/null
-/*
- * Carsten Langgaard, carstenl@mips.com
- * Copyright (C) 1999, 2000 MIPS Technologies, Inc. All rights reserved.
- *
- * This program is free software; you can distribute it and/or modify it
- * under the terms of the GNU General Public License (Version 2) as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * Interrupt exception dispatch code.
- */
-#include <linux/config.h>
-
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-#include <asm/mips-boards/atlasint.h>
-
-/*
- * Furthermore, the IRQs on the MIPS board look basically (barring software
- * IRQs which we don't use at all and all external interrupt sources are
- * combined together on hardware interrupt 0 (MIPS IRQ 2)) like:
- *
- * MIPS IRQ Source
- * -------- ------
- * 0 Software (ignored)
- * 1 Software (ignored)
- * 2 Combined hardware interrupt (hw0)
- * 3 Hardware (ignored)
- * 4 Hardware (ignored)
- * 5 Hardware (ignored)
- * 6 Hardware (ignored)
- * 7 R4k timer (what we use)
- *
- * Note: On the SEAD board thing are a little bit different.
- * Here IRQ 2 (hw0) is wired to the UART0 and IRQ 3 (hw1) is wired
- * wired to UART1.
- *
- * We handle the IRQ according to _our_ priority which is:
- *
- * Highest ---- R4k Timer
- * Lowest ---- Combined hardware interrupt
- *
- * then we just return, if multiple IRQs are pending then we will just take
- * another exception, big deal.
- */
-
- .text
- .set noreorder
- .set noat
- .align 5
- NESTED(mipsIRQ, PT_SIZE, sp)
- SAVE_ALL
- CLI
- .set at
-
- mfc0 s0, CP0_CAUSE # get irq bits
- mfc0 s1, CP0_STATUS # get irq mask
- andi s0, ST0_IM # CAUSE.CE may be non-zero!
- and s0, s1
-
-#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64)
- .set mips32
- clz a0, s0
- .set mips0
- negu a0
- addu a0, 31-CAUSEB_IP
- bltz a0, spurious
-#else
- beqz s0, spurious
- li a0, 7
-
- and t0, s0, 0xf000
- sltiu t0, t0, 1
- sll t0, 2
- subu a0, t0
- sll s0, t0
-
- and t0, s0, 0xc000
- sltiu t0, t0, 1
- sll t0, 1
- subu a0, t0
- sll s0, t0
-
- and t0, s0, 0x8000
- sltiu t0, t0, 1
- # sll t0, 0
- subu a0, t0
- # sll s0, t0
-#endif
-
- li a1, MIPSCPU_INT_ATLAS
- bne a0, a1, 1f
- addu a0, MIPSCPU_INT_BASE
-
- jal atlas_hw0_irqdispatch
- move a0, sp
-
- j ret_from_irq
- nop
-
-1: jal do_IRQ
- move a1, sp
-
- j ret_from_irq
- nop
-
-spurious:
- j spurious_interrupt
- nop
- END(mipsIRQ)
static struct atlas_ictrl_regs *atlas_hw0_icregs;
-extern asmlinkage void mipsIRQ(void);
-
#if 0
#define DEBUG_INT(x...) printk(x)
#else
return b;
}
-void atlas_hw0_irqdispatch(struct pt_regs *regs)
+static inline void atlas_hw0_irqdispatch(struct pt_regs *regs)
{
unsigned long int_status;
int irq;
do_IRQ(irq, regs);
}
+static inline int clz(unsigned long x)
+{
+ __asm__ (
+ " .set push \n"
+ " .set mips32 \n"
+ " clz %0, %1 \n"
+ " .set pop \n"
+ : "=r" (x)
+ : "r" (x));
+
+ return x;
+}
+
+/*
+ * Version of ffs that only looks at bits 12..15.
+ */
+static inline unsigned int irq_ffs(unsigned int pending)
+{
+#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64)
+ return -clz(pending) + 31 - CAUSEB_IP;
+#else
+ unsigned int a0 = 7;
+ unsigned int t0;
+
+ t0 = s0 & 0xf000;
+ t0 = t0 < 1;
+ t0 = t0 << 2;
+ a0 = a0 - t0;
+ s0 = s0 << t0;
+
+ t0 = s0 & 0xc000;
+ t0 = t0 < 1;
+ t0 = t0 << 1;
+ a0 = a0 - t0;
+ s0 = s0 << t0;
+
+ t0 = s0 & 0x8000;
+ t0 = t0 < 1;
+ //t0 = t0 << 2;
+ a0 = a0 - t0;
+ //s0 = s0 << t0;
+
+ return a0;
+#endif
+}
+
+/*
+ * IRQs on the Atlas board look basically (barring software IRQs which we
+ * don't use at all and all external interrupt sources are combined together
+ * on hardware interrupt 0 (MIPS IRQ 2)) like:
+ *
+ * MIPS IRQ Source
+ * -------- ------
+ * 0 Software (ignored)
+ * 1 Software (ignored)
+ * 2 Combined hardware interrupt (hw0)
+ * 3 Hardware (ignored)
+ * 4 Hardware (ignored)
+ * 5 Hardware (ignored)
+ * 6 Hardware (ignored)
+ * 7 R4k timer (what we use)
+ *
+ * We handle the IRQ according to _our_ priority which is:
+ *
+ * Highest ---- R4k Timer
+ * Lowest ---- Combined hardware interrupt
+ *
+ * then we just return, if multiple IRQs are pending then we will just take
+ * another exception, big deal.
+ */
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
+ int irq;
+
+ irq = irq_ffs(pending);
+
+ if (irq == MIPSCPU_INT_ATLAS)
+ atlas_hw0_irqdispatch(regs);
+ else if (irq > 0)
+ do_IRQ(MIPSCPU_INT_BASE + irq, regs);
+ else
+ spurious_interrupt(regs);
+}
+
void __init arch_init_irq(void)
{
int i;
*/
atlas_hw0_icregs->intrsten = 0xffffffff;
- /* Now safe to set the exception vector. */
- set_except_vector(0, mipsIRQ);
-
for (i = ATLASINT_BASE; i <= ATLASINT_END; i++) {
irq_desc[i].status = IRQ_DISABLED;
irq_desc[i].action = 0;
# under Linux.
#
-obj-y := malta_int.o malta-irq.o malta_setup.o
+obj-y := malta_int.o malta_setup.o
+++ /dev/null
-/*
- * Carsten Langgaard, carstenl@mips.com
- * Copyright (C) 1999, 2000 MIPS Technologies, Inc. All rights reserved.
- *
- * ########################################################################
- *
- * This program is free software; you can distribute it and/or modify it
- * under the terms of the GNU General Public License (Version 2) as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * ########################################################################
- *
- * Interrupt exception dispatch code.
- *
- */
-#include <linux/config.h>
-
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-#include <asm/mips-boards/maltaint.h>
-
-/*
- * IRQs on the Malta board look basically (barring software IRQs which we
- * don't use at all and all external interrupt sources are combined together
- * on hardware interrupt 0 (MIPS IRQ 2)) like:
- *
- * MIPS IRQ Source
- * -------- ------
- * 0 Software (ignored)
- * 1 Software (ignored)
- * 2 Combined hardware interrupt (hw0)
- * 3 Hardware (ignored)
- * 4 Hardware (ignored)
- * 5 Hardware (ignored)
- * 6 Hardware (ignored)
- * 7 R4k timer (what we use)
- *
- * We handle the IRQ according to _our_ priority which is:
- *
- * Highest ---- R4k Timer
- * Lowest ---- Combined hardware interrupt
- *
- * then we just return, if multiple IRQs are pending then we will just take
- * another exception, big deal.
- */
-
- .text
- .set noreorder
- .set noat
- .align 5
- NESTED(mipsIRQ, PT_SIZE, sp)
- SAVE_ALL
- CLI
- .set at
-
- mfc0 s0, CP0_CAUSE # get irq bits
- mfc0 s1, CP0_STATUS # get irq mask
- andi s0, ST0_IM # CAUSE.CE may be non-zero!
- and s0, s1
-
-#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64)
- .set mips32
- clz a0, s0
- .set mips0
- negu a0
- addu a0, 31-CAUSEB_IP
- bltz a0, spurious
-#else
- beqz s0, spurious
- li a0, 7
-
- and t0, s0, 0xf000
- sltiu t0, t0, 1
- sll t0, 2
- subu a0, t0
- sll s0, t0
-
- and t0, s0, 0xc000
- sltiu t0, t0, 1
- sll t0, 1
- subu a0, t0
- sll s0, t0
-
- and t0, s0, 0x8000
- sltiu t0, t0, 1
- # sll t0, 0
- subu a0, t0
- # sll s0, t0
-#endif
-
- li a1, MIPSCPU_INT_I8259A
- bne a0, a1, 1f
- addu a0, MIPSCPU_INT_BASE
-
- jal malta_hw0_irqdispatch
- move a0, sp
-
- j ret_from_irq
- nop
-1:
-
- jal do_IRQ
- move a1, sp
-
- j ret_from_irq
- nop
-
-spurious:
- j spurious_interrupt
- nop
- END(mipsIRQ)
#include <asm/mips-boards/msc01_pci.h>
#include <asm/msc01_ic.h>
-extern asmlinkage void mipsIRQ(void);
extern void mips_timer_interrupt(void);
static DEFINE_SPINLOCK(mips_irq_lock);
return irq;
}
-void malta_hw0_irqdispatch(struct pt_regs *regs)
+static void malta_hw0_irqdispatch(struct pt_regs *regs)
{
int irq;
die("CoreHi interrupt", regs);
}
+static inline int clz(unsigned long x)
+{
+ __asm__ (
+ " .set push \n"
+ " .set mips32 \n"
+ " clz %0, %1 \n"
+ " .set pop \n"
+ : "=r" (x)
+ : "r" (x));
+
+ return x;
+}
+
+/*
+ * Version of ffs that only looks at bits 12..15.
+ */
+static inline unsigned int irq_ffs(unsigned int pending)
+{
+#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64)
+ return -clz(pending) + 31 - CAUSEB_IP;
+#else
+ unsigned int a0 = 7;
+ unsigned int t0;
+
+ t0 = s0 & 0xf000;
+ t0 = t0 < 1;
+ t0 = t0 << 2;
+ a0 = a0 - t0;
+ s0 = s0 << t0;
+
+ t0 = s0 & 0xc000;
+ t0 = t0 < 1;
+ t0 = t0 << 1;
+ a0 = a0 - t0;
+ s0 = s0 << t0;
+
+ t0 = s0 & 0x8000;
+ t0 = t0 < 1;
+ //t0 = t0 << 2;
+ a0 = a0 - t0;
+ //s0 = s0 << t0;
+
+ return a0;
+#endif
+}
+
+/*
+ * IRQs on the Malta board look basically (barring software IRQs which we
+ * don't use at all and all external interrupt sources are combined together
+ * on hardware interrupt 0 (MIPS IRQ 2)) like:
+ *
+ * MIPS IRQ Source
+ * -------- ------
+ * 0 Software (ignored)
+ * 1 Software (ignored)
+ * 2 Combined hardware interrupt (hw0)
+ * 3 Hardware (ignored)
+ * 4 Hardware (ignored)
+ * 5 Hardware (ignored)
+ * 6 Hardware (ignored)
+ * 7 R4k timer (what we use)
+ *
+ * We handle the IRQ according to _our_ priority which is:
+ *
+ * Highest ---- R4k Timer
+ * Lowest ---- Combined hardware interrupt
+ *
+ * then we just return, if multiple IRQs are pending then we will just take
+ * another exception, big deal.
+ */
+
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
+ int irq;
+
+ irq = irq_ffs(pending);
+
+ if (irq == MIPSCPU_INT_I8259A)
+ malta_hw0_irqdispatch(regs);
+ else if (irq > 0)
+ do_IRQ(MIPSCPU_INT_BASE + irq, regs);
+ else
+ spurious_interrupt(regs);
+}
+
static struct irqaction i8259irq = {
.handler = no_action,
.name = "XT-PIC cascade"
void __init arch_init_irq(void)
{
- set_except_vector(0, mipsIRQ);
init_i8259_irqs();
if (!cpu_has_veic)
setup_irq (MIPSCPU_INT_BASE+MIPSCPU_INT_COREHI, &corehi_irqaction);
}
else {
- set_except_vector(0, mipsIRQ);
setup_irq (MIPSCPU_INT_BASE+MIPSCPU_INT_I8259A, &i8259irq);
setup_irq (MIPSCPU_INT_BASE+MIPSCPU_INT_COREHI, &corehi_irqaction);
}
# under Linux.
#
-obj-y := sead_int.o sead-irq.o sead_setup.o
+obj-y := sead_int.o sead_setup.o
+++ /dev/null
-/*
- * Carsten Langgaard, carstenl@mips.com
- * Copyright (C) 1999, 2000 MIPS Technologies, Inc. All rights reserved.
- *
- * ########################################################################
- *
- * This program is free software; you can distribute it and/or modify it
- * under the terms of the GNU General Public License (Version 2) as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * ########################################################################
- *
- * Interrupt exception dispatch code.
- *
- */
-#include <linux/config.h>
-
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-#include <asm/mips-boards/seadint.h>
-
-/*
- * IRQs on the SEAD board look basically are combined together on hardware
- * interrupt 0 (MIPS IRQ 2)) like:
- *
- * MIPS IRQ Source
- * -------- ------
- * 0 Software (ignored)
- * 1 Software (ignored)
- * 2 UART0 (hw0)
- * 3 UART1 (hw1)
- * 4 Hardware (ignored)
- * 5 Hardware (ignored)
- * 6 Hardware (ignored)
- * 7 R4k timer (what we use)
- *
- * We handle the IRQ according to _our_ priority which is:
- *
- * Highest ---- R4k Timer
- * Lowest ---- Combined hardware interrupt
- *
- * then we just return, if multiple IRQs are pending then we will just take
- * another exception, big deal.
- */
-
- .text
- .set noreorder
- .set noat
- .align 5
- NESTED(mipsIRQ, PT_SIZE, sp)
- SAVE_ALL
- CLI
- .set at
-
- mfc0 s0, CP0_CAUSE # get irq bits
- mfc0 s1, CP0_STATUS # get irq mask
- andi s0, ST0_IM # CAUSE.CE may be non-zero!
- and s0, s1
-
-#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64)
- .set mips32
- clz a0, s0
- .set mips0
- negu a0
- addu a0, 31-CAUSEB_IP
- bltz a0, spurious
-#else
- beqz s0, spurious
- li a0, 7
-
- and t0, s0, 0xf000
- sltiu t0, t0, 1
- sll t0, 2
- subu a0, t0
- sll s0, t0
-
- and t0, s0, 0xc000
- sltiu t0, t0, 1
- sll t0, 1
- subu a0, t0
- sll s0, t0
-
- and t0, s0, 0x8000
- sltiu t0, t0, 1
- # sll t0, 0
- subu a0, t0
- # sll s0, t0
-#endif
-
- addu a0, MIPSCPU_INT_BASE
- jal do_IRQ
- move a1, sp
-
- j ret_from_irq
- nop
-
-spurious:
- j spurious_interrupt
- nop
- END(mipsIRQ)
#include <linux/irq.h>
#include <asm/irq_cpu.h>
+#include <asm/mipsregs.h>
#include <asm/system.h>
#include <asm/mips-boards/seadint.h>
-extern asmlinkage void mipsIRQ(void);
+static inline int clz(unsigned long x)
+{
+ __asm__ (
+ " .set push \n"
+ " .set mips32 \n"
+ " clz %0, %1 \n"
+ " .set pop \n"
+ : "=r" (x)
+ : "r" (x));
+
+ return x;
+}
+
+/*
+ * Version of ffs that only looks at bits 12..15.
+ */
+static inline unsigned int irq_ffs(unsigned int pending)
+{
+#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64)
+ return -clz(pending) + 31 - CAUSEB_IP;
+#else
+ unsigned int a0 = 7;
+ unsigned int t0;
+
+ t0 = s0 & 0xf000;
+ t0 = t0 < 1;
+ t0 = t0 << 2;
+ a0 = a0 - t0;
+ s0 = s0 << t0;
+
+ t0 = s0 & 0xc000;
+ t0 = t0 < 1;
+ t0 = t0 << 1;
+ a0 = a0 - t0;
+ s0 = s0 << t0;
+
+ t0 = s0 & 0x8000;
+ t0 = t0 < 1;
+ //t0 = t0 << 2;
+ a0 = a0 - t0;
+ //s0 = s0 << t0;
+
+ return a0;
+#endif
+}
+
+/*
+ * IRQs on the SEAD board look basically are combined together on hardware
+ * interrupt 0 (MIPS IRQ 2)) like:
+ *
+ * MIPS IRQ Source
+ * -------- ------
+ * 0 Software (ignored)
+ * 1 Software (ignored)
+ * 2 UART0 (hw0)
+ * 3 UART1 (hw1)
+ * 4 Hardware (ignored)
+ * 5 Hardware (ignored)
+ * 6 Hardware (ignored)
+ * 7 R4k timer (what we use)
+ *
+ * We handle the IRQ according to _our_ priority which is:
+ *
+ * Highest ---- R4k Timer
+ * Lowest ---- Combined hardware interrupt
+ *
+ * then we just return, if multiple IRQs are pending then we will just take
+ * another exception, big deal.
+ */
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
+ int irq;
+
+ irq = irq_ffs(pending);
+
+ if (irq >= 0)
+ do_IRQ(MIPSCPU_INT_BASE + irq, regs);
+ else
+ spurious_interrupt(regs);
+}
void __init arch_init_irq(void)
{
mips_cpu_irq_init(MIPSCPU_INT_BASE);
-
- /* Now safe to set the exception vector. */
- set_except_vector(0, mipsIRQ);
}
extern void mips_cpu_irq_init(int);
-extern asmlinkage void simIRQ(void);
+static inline int clz(unsigned long x)
+{
+ __asm__ (
+ " .set push \n"
+ " .set mips32 \n"
+ " clz %0, %1 \n"
+ " .set pop \n"
+ : "=r" (x)
+ : "r" (x));
+
+ return x;
+}
+
+/*
+ * Version of ffs that only looks at bits 12..15.
+ */
+static inline unsigned int irq_ffs(unsigned int pending)
+{
+#if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64)
+ return -clz(pending) + 31 - CAUSEB_IP;
+#else
+ unsigned int a0 = 7;
+ unsigned int t0;
+
+ t0 = s0 & 0xf000;
+ t0 = t0 < 1;
+ t0 = t0 << 2;
+ a0 = a0 - t0;
+ s0 = s0 << t0;
+
+ t0 = s0 & 0xc000;
+ t0 = t0 < 1;
+ t0 = t0 << 1;
+ a0 = a0 - t0;
+ s0 = s0 << t0;
-asmlinkage void sim_hw0_irqdispatch(struct pt_regs *regs)
+ t0 = s0 & 0x8000;
+ t0 = t0 < 1;
+ //t0 = t0 << 2;
+ a0 = a0 - t0;
+ //s0 = s0 << t0;
+
+ return a0;
+#endif
+}
+
+static inline void sim_hw0_irqdispatch(struct pt_regs *regs)
{
do_IRQ(2, regs);
}
-void __init arch_init_irq(void)
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
- /* Now safe to set the exception vector. */
- set_except_vector(0, simIRQ);
+ unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
+ int irq;
+
+ irq = irq_ffs(pending);
+ if (irq > 0)
+ do_IRQ(MIPSCPU_INT_BASE + irq, regs);
+ else
+ spurious_interrupt(regs);
+}
+
+void __init arch_init_irq(void)
+{
mips_cpu_irq_init(MIPSCPU_INT_BASE);
}
# unless it's something special (ie not a .c file).
#
-obj-y += int-handler.o irq.o prom.o reset.o setup.o
+obj-y += irq.o prom.o reset.o setup.o
obj-$(CONFIG_SERIAL_8250_CONSOLE) += ja-console.o
obj-$(CONFIG_REMOTE_DEBUG) += dbg_io.o
+++ /dev/null
-/*
- * Copyright 2002 Momentum Computer Inc.
- * Author: Matthew Dharm <mdharm@momenco.com>
- *
- * Based on work:
- * Copyright 2001 MontaVista Software Inc.
- * Author: jsun@mvista.com or jsun@junsun.net
- *
- * First-level interrupt dispatcher for Jaguar-ATX board.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/addrspace.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-
-/*
- * First level interrupt dispatcher for Ocelot-CS board
- */
- .align 5
- NESTED(jaguar_handle_int, PT_SIZE, sp)
- SAVE_ALL
- CLI
- .set at
- mfc0 t0, CP0_CAUSE
- mfc0 t2, CP0_STATUS
-
- and t0, t2
-
- andi t1, t0, STATUSF_IP0 /* sw0 software interrupt */
- bnez t1, ll_sw0_irq
- andi t1, t0, STATUSF_IP1 /* sw1 software interrupt */
- bnez t1, ll_sw1_irq
- andi t1, t0, STATUSF_IP2 /* int0 hardware line */
- bnez t1, ll_pcixa_irq
- andi t1, t0, STATUSF_IP3 /* int1 hardware line */
- bnez t1, ll_pcixb_irq
- andi t1, t0, STATUSF_IP4 /* int2 hardware line */
- bnez t1, ll_pcia_irq
- andi t1, t0, STATUSF_IP5 /* int3 hardware line */
- bnez t1, ll_pcib_irq
- andi t1, t0, STATUSF_IP6 /* int4 hardware line */
- bnez t1, ll_uart_irq
- andi t1, t0, STATUSF_IP7 /* cpu timer */
- bnez t1, ll_cputimer_irq
-
- nop
- nop
-
- /* now look at extended interrupts */
- mfc0 t0, CP0_CAUSE
- cfc0 t1, CP0_S1_INTCONTROL
-
- /* shift the mask 8 bits left to line up the bits */
- sll t2, t1, 8
-
- and t0, t2
- srl t0, t0, 16
-
- andi t1, t0, STATUSF_IP8 /* int6 hardware line */
- bnez t1, ll_mv64340_decode_irq
-
- nop
- nop
-
- .set reorder
-
- /* wrong alarm or masked ... */
- j spurious_interrupt
- nop
- END(jaguar_handle_int)
-
- .align 5
-ll_sw0_irq:
- li a0, 0
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-ll_sw1_irq:
- li a0, 1
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-ll_pcixa_irq:
- li a0, 2
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_pcixb_irq:
- li a0, 3
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_pcia_irq:
- li a0, 4
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_pcib_irq:
- li a0, 5
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_uart_irq:
- li a0, 6
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_cputimer_irq:
- li a0, 7
- move a1, sp
- jal ll_timer_interrupt
- j ret_from_irq
-
-ll_mv64340_decode_irq:
- move a0, sp
- jal ll_mv64340_irq
- j ret_from_irq
* Copyright 2001 MontaVista Software Inc.
* Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
*
- * Copyright (C) 2000, 2001 Ralf Baechle (ralf@gnu.org)
+ * Copyright (C) 2000, 01, 06 Ralf Baechle (ralf@linux-mips.org)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
#include <linux/types.h>
#include <asm/irq_cpu.h>
#include <asm/mipsregs.h>
+#include <asm/time.h>
-extern asmlinkage void jaguar_handle_int(void);
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int pending = read_c0_cause() & read_c0_status();
+
+ if (pending & STATUSF_IP0)
+ do_IRQ(0, regs);
+ else if (pending & STATUSF_IP1)
+ do_IRQ(1, regs);
+ else if (pending & STATUSF_IP2)
+ do_IRQ(2, regs);
+ else if (pending & STATUSF_IP3)
+ do_IRQ(3, regs);
+ else if (pending & STATUSF_IP4)
+ do_IRQ(4, regs);
+ else if (pending & STATUSF_IP5)
+ do_IRQ(5, regs);
+ else if (pending & STATUSF_IP6)
+ do_IRQ(6, regs);
+ else if (pending & STATUSF_IP7)
+ ll_timer_interrupt(7, regs);
+ else {
+ /*
+ * Now look at the extended interrupts
+ */
+ pending = (read_c0_cause() & (read_c0_intcontrol() << 8)) >> 16;
+ if (pending & STATUSF_IP8)
+ ll_mv64340_irq(regs);
+ }
+}
static struct irqaction cascade_mv64340 = {
no_action, SA_INTERRUPT, CPU_MASK_NONE, "MV64340-Cascade", NULL, NULL
*/
clear_c0_status(ST0_IM);
- /* Sets the first-level interrupt dispatcher. */
- set_except_vector(0, jaguar_handle_int);
mips_cpu_irq_init(0);
rm7k_cpu_irq_init(8);
# removes any old dependencies. DON'T put your own dependencies here
# unless it's something special (ie not a .c file).
#
-obj-y += int-handler.o irq.o prom.o reset.o setup.o
+obj-y += irq.o prom.o reset.o setup.o
+++ /dev/null
-/*
- * Copyright 2002 Momentum Computer Inc.
- * Author: Matthew Dharm <mdharm@momenco.com>
- *
- * Copyright 2001 MontaVista Software Inc.
- * Author: jsun@mvista.com or jsun@junsun.net
- *
- * Copyright 2004 PMC-Sierra
- * Author: Manish Lachwani (lachwani@pmc-sierra.com)
- *
- * Copyright (C) 2004 MontaVista Software Inc.
- * Author: Manish Lachwani, mlachwani@mvista.com
- *
- * First-level interrupt dispatcher for Ocelot-3 board.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/addrspace.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-
-/*
- * First level interrupt dispatcher for Ocelot-3 board
- */
- .align 5
- NESTED(ocelot3_handle_int, PT_SIZE, sp)
- SAVE_ALL
- CLI
- .set at
-
- mfc0 t0, CP0_CAUSE
- mfc0 t2, CP0_STATUS
-
- and t0, t2
-
- andi t1, t0, STATUSF_IP0 /* sw0 software interrupt (IRQ0) */
- bnez t1, ll_sw0_irq
-
- andi t1, t0, STATUSF_IP1 /* sw1 software interrupt (IRQ1) */
- bnez t1, ll_sw1_irq
-
- andi t1, t0, STATUSF_IP2 /* int0 hardware line (IRQ2) */
- bnez t1, ll_pci0slot1_irq
-
- andi t1, t0, STATUSF_IP3 /* int1 hardware line (IRQ3) */
- bnez t1, ll_pci0slot2_irq
-
- andi t1, t0, STATUSF_IP4 /* int2 hardware line (IRQ4) */
- bnez t1, ll_pci1slot1_irq
-
- andi t1, t0, STATUSF_IP5 /* int3 hardware line (IRQ5) */
- bnez t1, ll_pci1slot2_irq
-
- andi t1, t0, STATUSF_IP6 /* int4 hardware line (IRQ6) */
- bnez t1, ll_uart_irq
-
- andi t1, t0, STATUSF_IP7 /* cpu timer (IRQ7) */
- bnez t1, ll_cputimer_irq
-
- /* now look at extended interrupts */
- mfc0 t0, CP0_CAUSE
- cfc0 t1, CP0_S1_INTCONTROL
-
- /* shift the mask 8 bits left to line up the bits */
- sll t2, t1, 8
-
- and t0, t2
- srl t0, t0, 16
-
- andi t1, t0, STATUSF_IP8 /* int6 hardware line (IRQ9) */
- bnez t1, ll_mv64340_decode_irq
-
- .set reorder
-
- /* wrong alarm or masked ... */
- jal spurious_interrupt
- nop
- j ret_from_irq
- nop
- END(ocelot3_handle_int)
-
- .align 5
-ll_sw0_irq:
- li a0, 0 /* IRQ 1 */
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-ll_sw1_irq:
- li a0, 1 /* IRQ 2 */
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_pci0slot1_irq:
- li a0, 2 /* IRQ 3 */
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_pci0slot2_irq:
- li a0, 3 /* IRQ 4 */
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_pci1slot1_irq:
- li a0, 4 /* IRQ 5 */
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_pci1slot2_irq:
- li a0, 5 /* IRQ 6 */
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_uart_irq:
- li a0, 6 /* IRQ 7 */
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_cputimer_irq:
- li a0, 7 /* IRQ 8 */
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_mv64340_decode_irq:
- move a0, sp
- jal ll_mv64340_irq
- j ret_from_irq
-
#include <asm/mipsregs.h>
#include <asm/system.h>
-extern asmlinkage void ocelot3_handle_int(void);
-
static struct irqaction cascade_mv64340 = {
no_action, SA_INTERRUPT, CPU_MASK_NONE, "MV64340-Cascade", NULL, NULL
};
*/
clear_c0_status(ST0_IM | ST0_BEV);
- /* Sets the first-level interrupt dispatcher. */
- set_except_vector(0, ocelot3_handle_int);
- mips_cpu_irq_init(0);
rm7k_cpu_irq_init(8);
/* set up the cascading interrupts */
set_c0_status(ST0_IM); /* IE in the status register */
}
+
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int pending = read_c0_cause() & read_c0_status();
+
+ if (pending & STATUSF_IP0)
+ do_IRQ(0, regs);
+ else if (pending & STATUSF_IP1)
+ do_IRQ(1, regs);
+ else if (pending & STATUSF_IP2)
+ do_IRQ(2, regs);
+ else if (pending & STATUSF_IP3)
+ do_IRQ(3, regs);
+ else if (pending & STATUSF_IP4)
+ do_IRQ(4, regs);
+ else if (pending & STATUSF_IP5)
+ do_IRQ(5, regs);
+ else if (pending & STATUSF_IP6)
+ do_IRQ(6, regs);
+ else if (pending & STATUSF_IP7)
+ do_IRQ(7, regs);
+ else {
+ /*
+ * Now look at the extended interrupts
+ */
+ pending = (read_c0_cause() & (read_c0_intcontrol() << 8)) >> 16;
+
+ if (pending & STATUSF_IP8)
+ ll_mv64340_irq(regs);
+ else
+ spurious_interrupt(regs);
+ }
+}
# Makefile for Momentum Computer's Ocelot-C and -CS boards.
#
-obj-y += cpci-irq.o int-handler.o irq.o prom.o reset.o \
+obj-y += cpci-irq.o irq.o prom.o reset.o \
setup.o uart-irq.o
obj-$(CONFIG_KGDB) += dbg_io.o
+++ /dev/null
-/*
- * Copyright 2002 Momentum Computer Inc.
- * Author: Matthew Dharm <mdharm@momenco.com>
- *
- * Copyright 2001 MontaVista Software Inc.
- * Author: jsun@mvista.com or jsun@junsun.net
- *
- * First-level interrupt dispatcher for Ocelot-CS board.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/addrspace.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-#include "ocelot_c_fpga.h"
-
-/*
- * First level interrupt dispatcher for Ocelot-CS board
- */
- .align 5
- NESTED(ocelot_handle_int, PT_SIZE, sp)
- SAVE_ALL
- CLI
- .set at
- mfc0 t0, CP0_CAUSE
- mfc0 t2, CP0_STATUS
-
- and t0, t2
-
- andi t1, t0, STATUSF_IP0 /* sw0 software interrupt */
- bnez t1, ll_sw0_irq
- andi t1, t0, STATUSF_IP1 /* sw1 software interrupt */
- bnez t1, ll_sw1_irq
- andi t1, t0, STATUSF_IP2 /* int0 hardware line */
- bnez t1, ll_scsi_irq
- andi t1, t0, STATUSF_IP3 /* int1 hardware line */
- bnez t1, ll_uart_decode_irq
- andi t1, t0, STATUSF_IP4 /* int2 hardware line */
- bnez t1, ll_pmc_irq
- andi t1, t0, STATUSF_IP5 /* int3 hardware line */
- bnez t1, ll_cpci_decode_irq
- andi t1, t0, STATUSF_IP6 /* int4 hardware line */
- bnez t1, ll_mv64340_decode_irq
- andi t1, t0, STATUSF_IP7 /* cpu timer */
- bnez t1, ll_cputimer_irq
-
- .set reorder
-
- /* wrong alarm or masked ... */
- jal spurious_interrupt
- nop
- j ret_from_irq
- END(ocelot_handle_int)
-
- .align 5
-ll_sw0_irq:
- li a0, 0
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-ll_sw1_irq:
- li a0, 1
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-ll_scsi_irq:
- li a0, 2
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_uart_decode_irq:
- move a0, sp
- jal ll_uart_irq
- j ret_from_irq
-
-ll_pmc_irq:
- li a0, 4
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_cpci_decode_irq:
- move a0, sp
- jal ll_cpci_irq
- j ret_from_irq
-
-ll_mv64340_decode_irq:
- move a0, sp
- jal ll_mv64340_irq
- j ret_from_irq
-
-ll_cputimer_irq:
- li a0, 7
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
#include <asm/mipsregs.h>
#include <asm/system.h>
-extern asmlinkage void ocelot_handle_int(void);
extern void uart_irq_init(void);
extern void cpci_irq_init(void);
no_action, SA_INTERRUPT, CPU_MASK_NONE, "cascade via MV64340", NULL, NULL
};
+extern void ll_uart_irq(struct pt_regs *regs);
+extern void ll_cpci_irq(struct pt_regs *regs);
+
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int pending = read_c0_cause() & read_c0_status();
+
+ if (pending & STATUSF_IP0)
+ do_IRQ(0, regs);
+ else if (pending & STATUSF_IP1)
+ do_IRQ(1, regs);
+ else if (pending & STATUSF_IP2)
+ do_IRQ(2, regs);
+ else if (pending & STATUSF_IP3)
+ ll_uart_irq(regs);
+ else if (pending & STATUSF_IP4)
+ do_IRQ(4, regs);
+ else if (pending & STATUSF_IP5)
+ ll_cpci_irq(regs);
+ else if (pending & STATUSF_IP6)
+ ll_mv64340_irq(regs);
+ else if (pending & STATUSF_IP7)
+ do_IRQ(7, regs);
+ else
+ spurious_interrupt(regs);
+}
+
void __init arch_init_irq(void)
{
/*
*/
clear_c0_status(ST0_IM);
- /* Sets the first-level interrupt dispatcher. */
- set_except_vector(0, ocelot_handle_int);
mips_cpu_irq_init(0);
/* set up the cascading interrupts */
# Makefile for Momentum Computer's Ocelot-G board.
#
-obj-y += int-handler.o irq.o gt-irq.o prom.o reset.o setup.o
+obj-y += irq.o gt-irq.o prom.o reset.o setup.o
obj-$(CONFIG_KGDB) += dbg_io.o
EXTRA_AFLAGS := $(CFLAGS)
+++ /dev/null
-/*
- * Copyright 2001 MontaVista Software Inc.
- * Author: jsun@mvista.com or jsun@junsun.net
- *
- * First-level interrupt dispatcher for ocelot board.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/addrspace.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-
-/*
- * first level interrupt dispatcher for ocelot board -
- * We check for the timer first, then check PCI ints A and D.
- * Then check for serial IRQ and fall through.
- */
- .align 5
- NESTED(ocelot_handle_int, PT_SIZE, sp)
- SAVE_ALL
- CLI
- .set at
- mfc0 t0, CP0_CAUSE
- mfc0 t2, CP0_STATUS
-
- and t0, t2
-
- andi t1, t0, STATUSF_IP2 /* int0 hardware line */
- bnez t1, ll_pri_enet_irq
- andi t1, t0, STATUSF_IP3 /* int1 hardware line */
- bnez t1, ll_sec_enet_irq
- andi t1, t0, STATUSF_IP4 /* int2 hardware line */
- bnez t1, ll_uart_irq
- andi t1, t0, STATUSF_IP5 /* int3 hardware line */
- bnez t1, ll_cpci_irq
- andi t1, t0, STATUSF_IP6 /* int4 hardware line */
- bnez t1, ll_galileo_p0_irq
- andi t1, t0, STATUSF_IP7 /* cpu timer */
- bnez t1, ll_cputimer_irq
-
- /* now look at the extended interrupts */
- mfc0 t0, CP0_CAUSE
- cfc0 t1, CP0_S1_INTCONTROL
-
- /* shift the mask 8 bits left to line up the bits */
- sll t2, t1, 8
-
- and t0, t2
- srl t0, t0, 16
-
- andi t1, t0, STATUSF_IP8 /* int6 hardware line */
- bnez t1, ll_galileo_p1_irq
- andi t1, t0, STATUSF_IP9 /* int7 hardware line */
- bnez t1, ll_pmc_irq
- andi t1, t0, STATUSF_IP10 /* int8 hardware line */
- bnez t1, ll_cpci_abcd_irq
- andi t1, t0, STATUSF_IP11 /* int9 hardware line */
- bnez t1, ll_testpoint_irq
-
- .set reorder
-
- /* wrong alarm or masked ... */
- j spurious_interrupt
- nop
- END(ocelot_handle_int)
-
- .align 5
-ll_pri_enet_irq:
- li a0, 2
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_sec_enet_irq:
- li a0, 3
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_uart_irq:
- li a0, 4
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_cpci_irq:
- li a0, 5
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_galileo_p0_irq:
- li a0, 6
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_cputimer_irq:
- li a0, 7
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_galileo_p1_irq:
- li a0, 8
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_pmc_irq:
- li a0, 9
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_cpci_abcd_irq:
- li a0, 10
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_testpoint_irq:
- li a0, 11
- move a1, sp
- jal do_IRQ
- j ret_from_irq
#include <asm/mipsregs.h>
#include <asm/system.h>
-extern asmlinkage void ocelot_handle_int(void);
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int pending = read_c0_cause() & read_c0_status();
+
+ if (pending & STATUSF_IP2)
+ do_IRQ(2, regs);
+ else if (pending & STATUSF_IP3)
+ do_IRQ(3, regs);
+ else if (pending & STATUSF_IP4)
+ do_IRQ(4, regs);
+ else if (pending & STATUSF_IP5)
+ do_IRQ(5, regs);
+ else if (pending & STATUSF_IP6)
+ do_IRQ(6, regs);
+ else if (pending & STATUSF_IP7)
+ do_IRQ(7, regs);
+ else {
+ /*
+ * Now look at the extended interrupts
+ */
+ pending = (read_c0_cause() & (read_c0_intcontrol() << 8)) >> 16;
+
+ if (pending & STATUSF_IP8)
+ do_IRQ(8, regs);
+ else if (pending & STATUSF_IP9)
+ do_IRQ(9, regs);
+ else if (pending & STATUSF_IP10)
+ do_IRQ(10, regs);
+ else if (pending & STATUSF_IP11)
+ do_IRQ(11, regs);
+ else
+ spurious_interrupt(regs);
+ }
+}
+
extern void gt64240_irq_init(void);
void __init arch_init_irq(void)
clear_c0_status(ST0_IM);
local_irq_disable();
- /* Sets the first-level interrupt dispatcher. */
- set_except_vector(0, ocelot_handle_int);
mips_cpu_irq_init(0);
rm7k_cpu_irq_init(8);
# under Linux.
#
-obj-y := setup.o prom.o mipsIRQ.o int.o reset.o time.o proc.o platform.o
+obj-y := setup.o prom.o int.o reset.o time.o proc.o platform.o
obj-$(CONFIG_PCI) += pci.o
obj-$(CONFIG_KGDB) += gdb_hook.o
#include <int.h>
#include <uart.h>
-extern asmlinkage void cp0_irqdispatch(void);
-
static DEFINE_SPINLOCK(irq_lock);
/* default prio for interrupts */
1 // 70
};
-void hw0_irqdispatch(int irq, struct pt_regs *regs)
+static void hw0_irqdispatch(int irq, struct pt_regs *regs)
{
/* find out which interrupt */
irq = PNX8550_GIC_VECTOR_0 >> 3;
}
-void timer_irqdispatch(int irq, struct pt_regs *regs)
+static void timer_irqdispatch(int irq, struct pt_regs *regs)
{
irq = (0x01c0 & read_c0_config7()) >> 6;
}
}
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int pending = read_c0_status() & read_c0_cause();
+
+ if (pending & STATUSF_IP2)
+ do_IRQ(2, regs);
+ else if (pending & STATUSF_IP7) {
+ if (read_c0_config7() & 0x01c0)
+ timer_irqdispatch(7, regs);
+ }
+
+ spurious_interrupt(regs);
+}
+
static inline void modify_cp0_intmask(unsigned clr_mask, unsigned set_mask)
{
unsigned long status = read_c0_status();
int i;
int configPR;
- /* init of cp0 interrupts */
- set_except_vector(0, cp0_irqdispatch);
-
for (i = 0; i < PNX8550_INT_CP0_TOTINT; i++) {
irq_desc[i].handler = &level_irq_type;
pnx8550_ack(i); /* mask the irq just in case */
+++ /dev/null
-/*
- * Copyright (c) 2002 Philips, Inc. All rights.
- * Copyright (c) 2002 Red Hat, Inc. All rights.
- *
- * This software may be freely redistributed under the terms of the
- * GNU General Public License.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Based upon arch/mips/galileo-boards/ev64240/int-handler.S
- *
- */
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/addrspace.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-
-/*
- * cp0_irqdispatch
- *
- * Code to handle in-core interrupt exception.
- */
-
- .align 5
- .set reorder
- .set noat
- NESTED(cp0_irqdispatch, PT_SIZE, sp)
- SAVE_ALL
- CLI
- .set at
- mfc0 t0,CP0_CAUSE
- mfc0 t2,CP0_STATUS
-
- and t0,t2
-
- andi t1,t0,STATUSF_IP2 /* int0 hardware line */
- bnez t1,ll_hw0_irq
- nop
-
- andi t1,t0,STATUSF_IP7 /* int5 hardware line */
- bnez t1,ll_timer_irq
- nop
-
- /* wrong alarm or masked ... */
-
- jal spurious_interrupt
- nop
- j ret_from_irq
- END(cp0_irqdispatch)
-
- .align 5
- .set reorder
-ll_hw0_irq:
- li a0,2
- move a1,sp
- jal hw0_irqdispatch
- nop
- j ret_from_irq
- nop
-
- .align 5
- .set reorder
-ll_timer_irq:
- mfc0 t3,CP0_CONFIG,7
- andi t4,t3,0x01c0
- beqz t4,ll_timer_out
- nop
- li a0,7
- move a1,sp
- jal timer_irqdispatch
- nop
-
-ll_timer_out: j ret_from_irq
- nop
# Makefile for the PMC-Sierra Titan
#
-obj-y += irq-handler.o irq.o i2c-yosemite.o prom.o py-console.o setup.o
+obj-y += irq.o i2c-yosemite.o prom.o py-console.o setup.o
obj-$(CONFIG_KGDB) += dbg_io.o
obj-$(CONFIG_SMP) += smp.o
+++ /dev/null
-/*
- * Copyright 2003, 04 PMC-Sierra Inc.
- * Author: Manish Lachwani (lachwani@pmc-sierra.com
- * Copyright 2004 Ralf Baechle (ralf@linux-mips.org)
- *
- * First-level interrupt router for the PMC-Sierra Titan board
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * Titan supports Hypertransport or PCI but not both. Hence, one interrupt
- * line is shared between the PCI slot A and Hypertransport. This is the
- * Processor INTB #0.
- */
-
-#include <linux/config.h>
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/addrspace.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-
- .align 5
- NESTED(titan_handle_int, PT_SIZE, sp)
- SAVE_ALL
- CLI
- .set at
- .set noreorder
- la ra, ret_from_irq
- mfc0 t0, CP0_CAUSE
- mfc0 t2, CP0_STATUS
-
- and t0, t2
-
- andi t2, t0, STATUSF_IP7 /* INTB5 hardware line */
- bnez t2, ll_timer_irq /* Timer */
- andi t1, t0, STATUSF_IP2 /* INTB0 hardware line */
- bnez t1, ll_pcia_irq /* 64-bit PCI */
- andi t2, t0, STATUSF_IP3 /* INTB1 hardware line */
- bnez t2, ll_pcib_irq /* second 64-bit PCI slot */
- andi t1, t0, STATUSF_IP4 /* INTB2 hardware line */
- bnez t1, ll_duart_irq /* UART */
- andi t2, t0, STATUSF_IP5 /* SMP inter-core interrupts */
- bnez t2, ll_smp_irq
- andi t1, t0, STATUSF_IP6
- bnez t1, ll_ht_irq /* Hypertransport */
-
- move a0, sp
- j do_extended_irq
- END(titan_handle_int)
-
- .set reorder
- .align 5
-
-ll_pcia_irq:
- li a0, 2
- move a1, sp
-#ifdef CONFIG_HYPERTRANSPORT
- j ll_ht_smp_irq_handler
-#else
- j do_IRQ
-#endif
-
-ll_pcib_irq:
- li a0, 3
- move a1, sp
- j do_IRQ
-
-ll_duart_irq:
- li a0, 4
- move a1, sp
- j do_IRQ
-
-ll_smp_irq:
- li a0, 5
- move a1, sp
-#ifdef CONFIG_SMP
- j titan_mailbox_irq
-#else
- j do_IRQ
-#endif
-
-ll_ht_irq:
- li a0, 6
- move a1, sp
- j ll_ht_smp_irq_handler
-
-ll_timer_irq:
- li a0, 7
- move a1, sp
- j do_IRQ
* Copyright (C) 2003 PMC-Sierra Inc.
* Author: Manish Lachwani (lachwani@pmc-sierra.com)
*
+ * Copyright (C) 2006 Ralf Baechle (ralf@linux-mips.org)
+ *
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
#define HYPERTRANSPORT_INTC 0x7a /* INTC# */
#define HYPERTRANSPORT_INTD 0x7b /* INTD# */
-extern asmlinkage void titan_handle_int(void);
extern void jaguar_mailbox_irq(struct pt_regs *);
/*
}
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int cause = read_c0_cause();
+ unsigned int status = read_c0_status();
+ unsigned int pending = cause & status;
+
+ if (pending & STATUSF_IP7) {
+ do_IRQ(7, regs);
+ } else if (pending & STATUSF_IP2) {
+#ifdef CONFIG_HYPERTRANSPORT
+ ll_ht_smp_irq_handler(2, regs);
+#else
+ do_IRQ(2, regs);
+#endif
+ } else if (pending & STATUSF_IP3) {
+ do_IRQ(3, regs);
+ } else if (pending & STATUSF_IP4) {
+ do_IRQ(4, regs);
+ } else if (pending & STATUSF_IP5) {
+#ifdef CONFIG_SMP
+ titan_mailbox_irq(regs);
+#else
+ do_IRQ(5, regs);
+#endif
+ } else if (pending & STATUSF_IP6) {
+ do_IRQ(4, regs);
+ }
+}
+
#ifdef CONFIG_KGDB
extern void init_second_port(void);
#endif
{
clear_c0_status(ST0_IM);
- set_except_vector(0, titan_handle_int);
mips_cpu_irq_init(0);
rm7k_cpu_irq_init(8);
rm9k_cpu_irq_init(12);
# Makefile for Qemu specific kernel interface routines under Linux.
#
-obj-y = q-firmware.o q-int.o q-irq.o q-mem.o q-setup.o
+obj-y = q-firmware.o q-irq.o q-mem.o q-setup.o
obj-$(CONFIG_SMP) += q-smp.o
+++ /dev/null
-/*
- * Qemu interrupt handler code.
- *
- * Copyright (C) 2005 by Ralf Baechle
- */
-#include <asm/asm.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-
- .align 5
- NESTED(qemu_handle_int, PT_SIZE, sp)
- SAVE_ALL
- CLI
- move a0, sp
- PTR_LA ra, ret_from_irq
- j do_qemu_int
- END(qemu_handle_int)
extern asmlinkage void qemu_handle_int(void);
-asmlinkage void do_qemu_int(struct pt_regs *regs)
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
unsigned int pending = read_c0_status() & read_c0_cause();
void __init arch_init_irq(void)
{
- set_except_vector(0, qemu_handle_int);
mips_hpt_frequency = QEMU_C0_COUNTER_CLOCK; /* 100MHz */
init_i8259_irqs();
# under Linux.
#
-obj-y += ip22-mc.o ip22-hpc.o ip22-int.o ip22-irq.o ip22-berr.o \
+obj-y += ip22-mc.o ip22-hpc.o ip22-int.o ip22-berr.o \
ip22-time.o ip22-nvram.o ip22-reset.o ip22-setup.o
obj-$(CONFIG_EISA) += ip22-eisa.o
static char lc2msk_to_irqnr[256];
static char lc3msk_to_irqnr[256];
-extern asmlinkage void indyIRQ(void);
extern int ip22_eisa_init(void);
static void enable_local0_irq(unsigned int irq)
.end = end_local3_irq,
};
-void indy_local0_irqdispatch(struct pt_regs *regs)
+static void indy_local0_irqdispatch(struct pt_regs *regs)
{
u8 mask = sgint->istat0 & sgint->imask0;
u8 mask2;
return;
}
-void indy_local1_irqdispatch(struct pt_regs *regs)
+static void indy_local1_irqdispatch(struct pt_regs *regs)
{
u8 mask = sgint->istat1 & sgint->imask1;
u8 mask2;
extern void ip22_be_interrupt(int irq, struct pt_regs *regs);
-void indy_buserror_irq(struct pt_regs *regs)
+static void indy_buserror_irq(struct pt_regs *regs)
{
int irq = SGI_BUSERR_IRQ;
#define SGI_INTERRUPTS SGINT_LOCAL3
#endif
+extern void indy_r4k_timer_interrupt(struct pt_regs *regs);
+extern void indy_8254timer_irq(struct pt_regs *regs);
+
+/*
+ * IRQs on the INDY look basically (barring software IRQs which we don't use
+ * at all) like:
+ *
+ * MIPS IRQ Source
+ * -------- ------
+ * 0 Software (ignored)
+ * 1 Software (ignored)
+ * 2 Local IRQ level zero
+ * 3 Local IRQ level one
+ * 4 8254 Timer zero
+ * 5 8254 Timer one
+ * 6 Bus Error
+ * 7 R4k timer (what we use)
+ *
+ * We handle the IRQ according to _our_ priority which is:
+ *
+ * Highest ---- R4k Timer
+ * Local IRQ zero
+ * Local IRQ one
+ * Bus Error
+ * 8254 Timer zero
+ * Lowest ---- 8254 Timer one
+ *
+ * then we just return, if multiple IRQs are pending then we will just take
+ * another exception, big deal.
+ */
+
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int pending = read_c0_cause();
+
+ /*
+ * First we check for r4k counter/timer IRQ.
+ */
+ if (pending & CAUSEF_IP7)
+ indy_r4k_timer_interrupt(regs);
+ else if (pending & CAUSEF_IP2)
+ indy_local0_irqdispatch(regs);
+ else if (pending & CAUSEF_IP3)
+ indy_local1_irqdispatch(regs);
+ else if (pending & CAUSEF_IP6)
+ indy_buserror_irq(regs);
+ else if (pending & (CAUSEF_IP4 | CAUSEF_IP5))
+ indy_8254timer_irq(regs);
+}
+
extern void mips_cpu_irq_init(unsigned int irq_base);
void __init arch_init_irq(void)
sgint->cmeimask0 = 0;
sgint->cmeimask1 = 0;
- set_except_vector(0, indyIRQ);
-
/* init CPU irqs */
mips_cpu_irq_init(SGINT_CPU);
+++ /dev/null
-/*
- * ip22-irq.S: Interrupt exception dispatch code for FullHouse and
- * Guiness.
- *
- * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
- */
-
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-
-/* A lot of complication here is taken away because:
- *
- * 1) We handle one interrupt and return, sitting in a loop and moving across
- * all the pending IRQ bits in the cause register is _NOT_ the answer, the
- * common case is one pending IRQ so optimize in that direction.
- *
- * 2) We need not check against bits in the status register IRQ mask, that
- * would make this routine slow as hell.
- *
- * 3) Linux only thinks in terms of all IRQs on or all IRQs off, nothing in
- * between like BSD spl() brain-damage.
- *
- * Furthermore, the IRQs on the INDY look basically (barring software IRQs
- * which we don't use at all) like:
- *
- * MIPS IRQ Source
- * -------- ------
- * 0 Software (ignored)
- * 1 Software (ignored)
- * 2 Local IRQ level zero
- * 3 Local IRQ level one
- * 4 8254 Timer zero
- * 5 8254 Timer one
- * 6 Bus Error
- * 7 R4k timer (what we use)
- *
- * We handle the IRQ according to _our_ priority which is:
- *
- * Highest ---- R4k Timer
- * Local IRQ zero
- * Local IRQ one
- * Bus Error
- * 8254 Timer zero
- * Lowest ---- 8254 Timer one
- *
- * then we just return, if multiple IRQs are pending then we will just take
- * another exception, big deal.
- */
-
- .text
- .set noreorder
- .set noat
- .align 5
- NESTED(indyIRQ, PT_SIZE, sp)
- SAVE_ALL
- CLI
- .set at
- mfc0 s0, CP0_CAUSE # get irq mask
-
- /* First we check for r4k counter/timer IRQ. */
- andi a0, s0, CAUSEF_IP7
- beq a0, zero, 1f
- andi a0, s0, CAUSEF_IP2 # delay slot, check local level zero
-
- /* Wheee, a timer interrupt. */
- jal indy_r4k_timer_interrupt
- move a0, sp # delay slot
- j ret_from_irq
- nop # delay slot
-
-1:
- beq a0, zero, 1f
- andi a0, s0, CAUSEF_IP3 # delay slot, check local level one
-
- /* Wheee, local level zero interrupt. */
- jal indy_local0_irqdispatch
- move a0, sp # delay slot
-
- j ret_from_irq
- nop # delay slot
-
-1:
- beq a0, zero, 1f
- andi a0, s0, CAUSEF_IP6 # delay slot, check bus error
-
- /* Wheee, local level one interrupt. */
- jal indy_local1_irqdispatch
- move a0, sp # delay slot
- j ret_from_irq
- nop # delay slot
-
-1:
- beq a0, zero, 1f
- andi a0, s0, (CAUSEF_IP4 | CAUSEF_IP5) # delay slot
-
- /* Wheee, an asynchronous bus error... */
- jal indy_buserror_irq
- move a0, sp # delay slot
- j ret_from_irq
- nop # delay slot
-
-1:
- /* Here by mistake? It is possible, that by the time we take
- * the exception the IRQ pin goes low, so just leave if this
- * is the case.
- */
- beq a0, zero, 1f
- nop # delay slot
-
- /* Must be one of the 8254 timers... */
- jal indy_8254timer_irq
- move a0, sp # delay slot
-1:
- j ret_from_irq
- nop # delay slot
- END(indyIRQ)
# Makefile for the IP27 specific kernel interface routines under Linux.
#
-obj-y := ip27-berr.o ip27-console.o ip27-irq.o ip27-init.o ip27-irq-glue.o \
+obj-y := ip27-berr.o ip27-console.o ip27-irq.o ip27-init.o \
ip27-klconfig.o ip27-klnuma.o ip27-memory.o ip27-nmi.o ip27-reset.o \
ip27-timer.o ip27-hubio.o ip27-xtalk.o
in irix?
6. Investigate why things do not work without the setup_test() call
being invoked on all nodes in ip27-memory.c.
-7. Too many CLIs in the locore handlers :
-For the low level handlers set up by set_except_vector(),
-__tlb_refill_debug_tramp, __xtlb_refill_debug_tramp and cacheerror,
-investigate whether the code should do CLI, STI or KMODE.
8. Too many do_page_faults invoked - investigate.
9. start_thread must turn off UX64 ... and define tlb_refill_debug.
10. Need a bad pmd table, bad pte table. __bad_pmd_table/__bad_pagetable
+++ /dev/null
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1999 Ralf Baechle
- * Copyright (C) 1999 Silicon Graphics, Inc.
- */
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-
- .text
- .align 5
-NESTED(ip27_irq, PT_SIZE, sp)
- SAVE_ALL
- CLI
-
- mfc0 s0, CP0_CAUSE
- mfc0 t0, CP0_STATUS
- and s0, t0
- move a0, sp
- PTR_LA ra, ret_from_irq
-
- /* First check for RT interrupt. */
- andi t0, s0, CAUSEF_IP4
- bnez t0, ip4
- andi t0, s0, CAUSEF_IP2
- bnez t0, ip2
- andi t0, s0, CAUSEF_IP3
- bnez t0, ip3
- andi t0, s0, CAUSEF_IP5
- bnez t0, ip5
- andi t0, s0, CAUSEF_IP6
- bnez t0, ip6
- j ra
-
-ip2: j ip27_do_irq_mask0 # PI_INT_PEND_0 or CC_PEND_{A|B}
-ip3: j ip27_do_irq_mask1 # PI_INT_PEND_1
-ip4: j ip27_rt_timer_interrupt
-ip5: j ip27_prof_timer
-ip6: j ip27_hub_error
-
- END(ip27_irq)
* Kanoj 05.13.00
*/
-void ip27_do_irq_mask0(struct pt_regs *regs)
+static void ip27_do_irq_mask0(struct pt_regs *regs)
{
int irq, swlevel;
hubreg_t pend0, mask0;
LOCAL_HUB_L(PI_INT_PEND0);
}
-void ip27_do_irq_mask1(struct pt_regs *regs)
+static void ip27_do_irq_mask1(struct pt_regs *regs)
{
int irq, swlevel;
hubreg_t pend1, mask1;
LOCAL_HUB_L(PI_INT_PEND1);
}
-void ip27_prof_timer(struct pt_regs *regs)
+static void ip27_prof_timer(struct pt_regs *regs)
{
panic("CPU %d got a profiling interrupt", smp_processor_id());
}
-void ip27_hub_error(struct pt_regs *regs)
+static void ip27_hub_error(struct pt_regs *regs)
{
panic("CPU %d got a hub error interrupt", smp_processor_id());
}
return irq;
}
+extern void ip27_rt_timer_interrupt(struct pt_regs *regs);
+
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned long pending = read_c0_cause() & read_c0_status();
+
+ if (pending & CAUSEF_IP4)
+ ip27_rt_timer_interrupt(regs);
+ else if (pending & CAUSEF_IP2) /* PI_INT_PEND_0 or CC_PEND_{A|B} */
+ ip27_do_irq_mask0(regs);
+ else if (pending & CAUSEF_IP3) /* PI_INT_PEND_1 */
+ ip27_do_irq_mask1(regs);
+ else if (pending & CAUSEF_IP5)
+ ip27_prof_timer(regs);
+ else if (pending & CAUSEF_IP6)
+ ip27_hub_error(regs);
+}
+
void __init arch_init_irq(void)
{
- set_except_vector(0, ip27_irq);
}
void install_ipi(void)
# under Linux.
#
-obj-y += ip32-berr.o ip32-irq.o ip32-irq-glue.o ip32-setup.o ip32-reset.o \
+obj-y += ip32-berr.o ip32-irq.o ip32-setup.o ip32-reset.o \
crime.o ip32-memory.o
EXTRA_AFLAGS := $(CFLAGS)
+++ /dev/null
-/*
- * Low level interrupt handler for the SGI O2 aka IP32 aka Moosehead
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2000 Harald Koerfgen
- * Copyright (C) 2001 Keith M Wesolowski
- */
-#include <asm/asm.h>
-#include <asm/regdef.h>
-#include <asm/mipsregs.h>
-#include <asm/stackframe.h>
-#include <asm/addrspace.h>
-
- .text
- .set noreorder
- .set noat
- .align 5
- NESTED(ip32_handle_int, PT_SIZE, ra)
- .set noat
- SAVE_ALL
- CLI # TEST: interrupts should be off
- .set at
- .set noreorder
-
- mfc0 s0,CP0_CAUSE
-
- andi t1, s0, IE_IRQ0
- bnez t1, handle_irq0
- andi t1, s0, IE_IRQ1
- bnez t1, handle_irq1
- andi t1, s0, IE_IRQ2
- bnez t1, handle_irq2
- andi t1, s0, IE_IRQ3
- bnez t1, handle_irq3
- andi t1, s0, IE_IRQ4
- bnez t1, handle_irq4
- andi t1, s0, IE_IRQ5
- bnez t1, handle_irq5
- nop
-
- /* Either someone has triggered the "software interrupts"
- * or we lost an interrupt somehow. Ignore it.
- */
- j ret_from_irq
- nop
-
-handle_irq0:
- jal ip32_irq0
- move a0, sp
- j ret_from_irq
- nop
-
-handle_irq1:
- jal ip32_irq1
- move a0, sp
- j ret_from_irq
- nop
-
-handle_irq2:
- jal ip32_irq2
- move a0, sp
- j ret_from_irq
- nop
-
-handle_irq3:
- jal ip32_irq3
- move a0, sp
- j ret_from_irq
- nop
-
-handle_irq4:
- jal ip32_irq4
- move a0, sp
- j ret_from_irq
- nop
-
-handle_irq5:
- jal ip32_irq5
- move a0, sp
- j ret_from_irq
- nop
-
- END(ip32_handle_int)
struct irqaction cpuerr_irq = { crime_cpuerr_intr, SA_INTERRUPT,
CPU_MASK_NONE, "CRIME CPU error", NULL, NULL };
-extern void ip32_handle_int(void);
-
/*
* For interrupts wired from a single device to the CPU. Only the clock
* uses this it seems, which is IRQ 0 and IP7.
/* CRIME 1.1 appears to deliver all interrupts to this one pin. */
/* change this to loop over all edge-triggered irqs, exception masked out ones */
-void ip32_irq0(struct pt_regs *regs)
+static void ip32_irq0(struct pt_regs *regs)
{
uint64_t crime_int;
int irq = 0;
do_IRQ(irq, regs);
}
-void ip32_irq1(struct pt_regs *regs)
+static void ip32_irq1(struct pt_regs *regs)
{
ip32_unknown_interrupt(regs);
}
-void ip32_irq2(struct pt_regs *regs)
+static void ip32_irq2(struct pt_regs *regs)
{
ip32_unknown_interrupt(regs);
}
-void ip32_irq3(struct pt_regs *regs)
+static void ip32_irq3(struct pt_regs *regs)
{
ip32_unknown_interrupt(regs);
}
-void ip32_irq4(struct pt_regs *regs)
+static void ip32_irq4(struct pt_regs *regs)
{
ip32_unknown_interrupt(regs);
}
-void ip32_irq5(struct pt_regs *regs)
+static void ip32_irq5(struct pt_regs *regs)
{
ll_timer_interrupt(IP32_R4K_TIMER_IRQ, regs);
}
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int pending = read_c0_cause();
+
+ if (likely(pending & IE_IRQ0))
+ ip32_irq0(regs);
+ else if (unlikely(pending & IE_IRQ1))
+ ip32_irq1(regs);
+ else if (unlikely(pending & IE_IRQ2))
+ ip32_irq2(regs);
+ else if (unlikely(pending & IE_IRQ3))
+ ip32_irq3(regs);
+ else if (unlikely(pending & IE_IRQ4))
+ ip32_irq4(regs);
+ else if (likely(pending & IE_IRQ5))
+ ip32_irq5(regs);
+}
+
void __init arch_init_irq(void)
{
unsigned int irq;
crime->soft_int = 0;
mace->perif.ctrl.istat = 0;
mace->perif.ctrl.imask = 0;
- set_except_vector(0, ip32_handle_int);
for (irq = 0; irq <= IP32_IRQ_MAX; irq++) {
hw_irq_controller *controller;
-obj-y := setup.o irq.o irq_handler.o time.o
+obj-y := setup.o irq.o time.o
obj-$(CONFIG_SMP) += smp.o
#endif
-/* Defined in arch/mips/sibyte/bcm1480/irq_handler.S */
-extern void bcm1480_irq_handler(void);
-
/*****************************************************************************/
static unsigned int startup_bcm1480_irq(unsigned int irq)
#endif
/* Enable necessary IPs, disable the rest */
change_c0_status(ST0_IM, imask);
- set_except_vector(0, bcm1480_irq_handler);
#ifdef CONFIG_KGDB
if (kgdb_flag) {
}
#endif /* CONFIG_KGDB */
+
+static inline int dclz(unsigned long long x)
+{
+ int lz;
+
+ __asm__ (
+ " .set push \n"
+ " .set mips64 \n"
+ " dclz %0, %1 \n"
+ " .set pop \n"
+ : "=r" (lz)
+ : "r" (x));
+
+ return lz;
+}
+
+extern void bcm1480_timer_interrupt(struct pt_regs *regs);
+extern void bcm1480_mailbox_interrupt(struct pt_regs *regs);
+extern void bcm1480_kgdb_interrupt(struct pt_regs *regs);
+
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int pending;
+
+#ifdef CONFIG_SIBYTE_BCM1480_PROF
+ /* Set compare to count to silence count/compare timer interrupts */
+ write_c0_compare(read_c0_count());
+#endif
+
+ pending = read_c0_cause();
+
+#ifdef CONFIG_SIBYTE_BCM1480_PROF
+ if (pending & CAUSEF_IP7) /* Cpu performance counter interrupt */
+ sbprof_cpu_intr(exception_epc(regs));
+#endif
+
+ if (pending & CAUSEF_IP4)
+ bcm1480_timer_interrupt(regs);
+
+#ifdef CONFIG_SMP
+ if (pending & CAUSEF_IP3)
+ bcm1480_mailbox_interrupt(regs);
+#endif
+
+#ifdef CONFIG_KGDB
+ if (pending & CAUSEF_IP6)
+ bcm1480_kgdb_interrupt(regs); /* KGDB (uart 1) */
+#endif
+
+ if (pending & CAUSEF_IP2) {
+ unsigned long long mask_h, mask_l;
+ unsigned long base;
+
+ /*
+ * Default...we've hit an IP[2] interrupt, which means we've
+ * got to check the 1480 interrupt registers to figure out what
+ * to do. Need to detect which CPU we're on, now that
+ * smp_affinity is supported.
+ */
+ base = A_BCM1480_IMR_MAPPER(smp_processor_id());
+ mask_h = __raw_readq(
+ IOADDR(base + R_BCM1480_IMR_INTERRUPT_STATUS_BASE_H));
+ mask_l = __raw_readq(
+ IOADDR(base + R_BCM1480_IMR_INTERRUPT_STATUS_BASE_L));
+
+ if (!mask_h) {
+ if (mask_h ^ 1)
+ do_IRQ(63 - dclz(mask_h), regs);
+ else
+ do_IRQ(127 - dclz(mask_l), regs);
+ }
+ }
+}
+++ /dev/null
-/*
- * Copyright (C) 2000,2001,2002,2003,2004 Broadcom Corporation
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-/*
- * bcm1480_irq_handler() is the routine that is actually called when an
- * interrupt occurs. It is installed as the exception vector handler in
- * init_IRQ() in arch/mips/sibyte/bcm1480/irq.c
- *
- * In the handle we figure out which interrupts need handling, and use that
- * to call the dispatcher, which will take care of actually calling
- * registered handlers
- *
- * Note that we take care of all raised interrupts in one go at the handler.
- * This is more BSDish than the Indy code, and also, IMHO, more sane.
- */
-#include <linux/config.h>
-
-#include <asm/addrspace.h>
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-#include <asm/sibyte/sb1250_defs.h>
-#include <asm/sibyte/bcm1480_regs.h>
-#include <asm/sibyte/bcm1480_int.h>
-
-/*
- * What a pain. We have to be really careful saving the upper 32 bits of any
- * register across function calls if we don't want them trashed--since were
- * running in -o32, the calling routing never saves the full 64 bits of a
- * register across a function call. Being the interrupt handler, we're
- * guaranteed that interrupts are disabled during this code so we don't have
- * to worry about random interrupts blasting the high 32 bits.
- */
-
- .text
- .set push
- .set noreorder
- .set noat
- .set mips64
- #.set mips4
- .align 5
- NESTED(bcm1480_irq_handler, PT_SIZE, sp)
- SAVE_ALL
- CLI
-
-#ifdef CONFIG_SIBYTE_BCM1480_PROF
- /* Set compare to count to silence count/compare timer interrupts */
- mfc0 t1, CP0_COUNT
- mtc0 t1, CP0_COMPARE /* pause to clear IP[7] bit of cause ? */
-#endif
- /* Read cause */
- mfc0 s0, CP0_CAUSE
-
-#ifdef CONFIG_SIBYTE_BCM1480_PROF
- /* Cpu performance counter interrupt is routed to IP[7] */
- andi t1, s0, CAUSEF_IP7
- beqz t1, 0f
- srl t1, s0, (CAUSEB_BD-2) /* Shift BD bit to bit 2 */
- and t1, t1, 0x4 /* mask to get just BD bit */
-#ifdef CONFIG_MIPS64
- dmfc0 a0, CP0_EPC
- daddu a0, a0, t1 /* a0 = EPC + (BD ? 4 : 0) */
-#else
- mfc0 a0, CP0_EPC
- addu a0, a0, t1 /* a0 = EPC + (BD ? 4 : 0) */
-#endif
- jal sbprof_cpu_intr
- nop
- j ret_from_irq
- nop
-0:
-#endif
-
- /* Timer interrupt is routed to IP[4] */
- andi t1, s0, CAUSEF_IP4
- beqz t1, 1f
- nop
- jal bcm1480_timer_interrupt
- move a0, sp /* Pass the registers along */
- j ret_from_irq
- nop /* delay slot */
-1:
-
-#ifdef CONFIG_SMP
- /* Mailbox interrupt is routed to IP[3] */
- andi t1, s0, CAUSEF_IP3
- beqz t1, 2f
- nop
- jal bcm1480_mailbox_interrupt
- move a0, sp
- j ret_from_irq
- nop /* delay slot */
-2:
-#endif
-
-#ifdef CONFIG_KGDB
- /* KGDB (uart 1) interrupt is routed to IP[6] */
- andi t1, s0, CAUSEF_IP6
- beqz t1, 3f
- nop /* delay slot */
- jal bcm1480_kgdb_interrupt
- move a0, sp
- j ret_from_irq
- nop /* delay slot */
-3:
-#endif
-
- and t1, s0, CAUSEF_IP2
- beqz t1, 9f
- nop
-
- /*
- * Default...we've hit an IP[2] interrupt, which means we've got
- * to check the 1480 interrupt registers to figure out what to do
- * Need to detect which CPU we're on, now that smp_affinity is
- * supported.
- */
- PTR_LA v0, CKSEG1 + A_BCM1480_IMR_CPU0_BASE
-#ifdef CONFIG_SMP
- lw t1, TI_CPU($28)
- sll t1, t1, BCM1480_IMR_REGISTER_SPACING_SHIFT
- addu v0, v0, t1
-#endif
-
- /* Read IP[2] status (get both high and low halves of status) */
- ld s0, R_BCM1480_IMR_INTERRUPT_STATUS_BASE_H(v0)
- ld s1, R_BCM1480_IMR_INTERRUPT_STATUS_BASE_L(v0)
-
- move s2, zero /* intr number */
- li s3, 64
-
- beqz s0, 9f /* No interrupts. Return. */
- move a1, sp
-
- xori s4, s0, 1 /* if s0 (_H) == 1, it's a low intr, so... */
- movz s2, s3, s4 /* start the intr number at 64, and */
- movz s0, s1, s4 /* look at the low status value. */
-
- dclz s1, s0 /* Find the next interrupt. */
- dsubu a0, zero, s1
- daddiu a0, a0, 63
- jal do_IRQ
- daddu a0, a0, s2
-
-9: j ret_from_irq
- nop
-
- .set pop
- END(bcm1480_irq_handler)
-obj-y := setup.o irq.o irq_handler.o time.o
+obj-y := setup.o irq.o time.o
obj-$(CONFIG_SMP) += smp.o
obj-$(CONFIG_SIBYTE_TBPROF) += bcm1250_tbprof.o
}
#endif
-
-/* Defined in arch/mips/sibyte/sb1250/irq_handler.S */
-extern void sb1250_irq_handler(void);
-
/*****************************************************************************/
static unsigned int startup_sb1250_irq(unsigned int irq)
#endif
/* Enable necessary IPs, disable the rest */
change_c0_status(ST0_IM, imask);
- set_except_vector(0, sb1250_irq_handler);
#ifdef CONFIG_KGDB
if (kgdb_flag) {
#define duart_out(reg, val) csr_out32(val, IOADDR(A_DUART_CHANREG(kgdb_port,reg)))
#define duart_in(reg) csr_in32(IOADDR(A_DUART_CHANREG(kgdb_port,reg)))
-void sb1250_kgdb_interrupt(struct pt_regs *regs)
+static void sb1250_kgdb_interrupt(struct pt_regs *regs)
{
/*
* Clear break-change status (allow some time for the remote
}
#endif /* CONFIG_KGDB */
+
+static inline int dclz(unsigned long long x)
+{
+ int lz;
+
+ __asm__ (
+ " .set push \n"
+ " .set mips64 \n"
+ " dclz %0, %1 \n"
+ " .set pop \n"
+ : "=r" (lz)
+ : "r" (x));
+
+ return lz;
+}
+
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int pending;
+
+#ifdef CONFIG_SIBYTE_SB1250_PROF
+ /* Set compare to count to silence count/compare timer interrupts */
+ write_c0_count(read_c0_count());
+#endif
+
+ /*
+ * What a pain. We have to be really careful saving the upper 32 bits
+ * of any * register across function calls if we don't want them
+ * trashed--since were running in -o32, the calling routing never saves
+ * the full 64 bits of a register across a function call. Being the
+ * interrupt handler, we're guaranteed that interrupts are disabled
+ * during this code so we don't have to worry about random interrupts
+ * blasting the high 32 bits.
+ */
+
+ pending = read_c0_cause();
+
+#ifdef CONFIG_SIBYTE_SB1250_PROF
+ if (pending & CAUSEF_IP7) { /* Cpu performance counter interrupt */
+ sbprof_cpu_intr(exception_epc(regs));
+ }
+#endif
+
+ if (pending & CAUSEF_IP4)
+ sb1250_timer_interrupt(regs);
+
+#ifdef CONFIG_SMP
+ if (pending & CAUSEF_IP3)
+ sb1250_mailbox_interrupt(regs);
+#endif
+
+#ifdef CONFIG_KGDB
+ if (pending & CAUSEF_IP6) /* KGDB (uart 1) */
+ sb1250_kgdb_interrupt(regs);
+#endif
+
+ if (pending & CAUSEF_IP2) {
+ unsigned long long mask;
+
+ /*
+ * Default...we've hit an IP[2] interrupt, which means we've
+ * got to check the 1250 interrupt registers to figure out what
+ * to do. Need to detect which CPU we're on, now that
+ ~ smp_affinity is supported.
+ */
+ mask = __raw_readq(IOADDR(A_IMR_REGISTER(smp_processor_id(),
+ R_IMR_INTERRUPT_STATUS_BASE)));
+ if (mask)
+ do_IRQ(63 - dclz(mask), regs);
+ }
+}
+++ /dev/null
-/*
- * Copyright (C) 2000, 2001, 2002, 2003 Broadcom Corporation
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-/*
- * sb1250_handle_int() is the routine that is actually called when an interrupt
- * occurs. It is installed as the exception vector handler in arch_init_irq()
- * in arch/mips/sibyte/sb1250/irq.c
- *
- * In the handle we figure out which interrupts need handling, and use that to
- * call the dispatcher, which will take care of actually calling registered
- * handlers
- *
- * Note that we take care of all raised interrupts in one go at the handler.
- * This is more BSDish than the Indy code, and also, IMHO, more sane.
- */
-#include <linux/config.h>
-
-#include <asm/addrspace.h>
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-#include <asm/sibyte/sb1250_defs.h>
-#include <asm/sibyte/sb1250_regs.h>
-#include <asm/sibyte/sb1250_int.h>
-
-/*
- * What a pain. We have to be really careful saving the upper 32 bits of any
- * register across function calls if we don't want them trashed--since were
- * running in -o32, the calling routing never saves the full 64 bits of a
- * register across a function call. Being the interrupt handler, we're
- * guaranteed that interrupts are disabled during this code so we don't have
- * to worry about random interrupts blasting the high 32 bits.
- */
-
- .text
- .set push
- .set noreorder
- .set noat
- .set mips64
- .align 5
- NESTED(sb1250_irq_handler, PT_SIZE, sp)
- SAVE_ALL
- CLI
-
-#ifdef CONFIG_SIBYTE_SB1250_PROF
- /* Set compare to count to silence count/compare timer interrupts */
- mfc0 t1, CP0_COUNT
- mtc0 t1, CP0_COMPARE /* pause to clear IP[7] bit of cause ? */
-#endif
- /* Read cause */
- mfc0 s0, CP0_CAUSE
-
-#ifdef CONFIG_SIBYTE_SB1250_PROF
- /* Cpu performance counter interrupt is routed to IP[7] */
- andi t1, s0, CAUSEF_IP7
- beqz t1, 0f
- srl t1, s0, (CAUSEB_BD-2) /* Shift BD bit to bit 2 */
- and t1, t1, 0x4 /* mask to get just BD bit */
- mfc0 a0, CP0_EPC
- jal sbprof_cpu_intr
- addu a0, a0, t1 /* a0 = EPC + (BD ? 4 : 0) */
- j ret_from_irq
- nop
-0:
-#endif
-
- /* Timer interrupt is routed to IP[4] */
- andi t1, s0, CAUSEF_IP4
- beqz t1, 1f
- nop
- jal sb1250_timer_interrupt
- move a0, sp /* Pass the registers along */
- j ret_from_irq
- nop # delay slot
-1:
-
-#ifdef CONFIG_SMP
- /* Mailbox interrupt is routed to IP[3] */
- andi t1, s0, CAUSEF_IP3
- beqz t1, 2f
- nop
- jal sb1250_mailbox_interrupt
- move a0, sp
- j ret_from_irq
- nop # delay slot
-2:
-#endif
-
-#ifdef CONFIG_KGDB
- /* KGDB (uart 1) interrupt is routed to IP[6] */
- andi t1, s0, CAUSEF_IP6
- beqz t1, 1f
- nop # delay slot
- jal sb1250_kgdb_interrupt
- move a0, sp
- j ret_from_irq
- nop # delay slot
-1:
-#endif
-
- and t1, s0, CAUSEF_IP2
- beqz t1, 4f
- nop
-
- /*
- * Default...we've hit an IP[2] interrupt, which means we've got to
- * check the 1250 interrupt registers to figure out what to do
- * Need to detect which CPU we're on, now that smp_affinity is supported.
- */
- PTR_LA v0, CKSEG1 + A_IMR_CPU0_BASE
-#ifdef CONFIG_SMP
- lw t1, TI_CPU($28)
- sll t1, IMR_REGISTER_SPACING_SHIFT
- addu v0, t1
-#endif
- ld s0, R_IMR_INTERRUPT_STATUS_BASE(v0) /* read IP[2] status */
-
- beqz s0, 4f /* No interrupts. Return */
- move a1, sp
-
-3: dclz s1, s0 /* Find the next interrupt */
- dsubu a0, zero, s1
- daddiu a0, a0, 63
- jal do_IRQ
- nop
-
-4: j ret_from_irq
- nop
-
- .set pop
- END(sb1250_irq_handler)
# Makefile for the SNI specific part of the kernel
#
-obj-y += int-handler.o irq.o pcimt_scache.o reset.o setup.o
+obj-y += irq.o pcimt_scache.o reset.o setup.o
EXTRA_AFLAGS := $(CFLAGS)
+++ /dev/null
-/*
- * SNI RM200 PCI specific interrupt handler code.
- *
- * Copyright (C) 1994, 95, 96, 97, 98, 1999, 2000, 01 by Ralf Baechle
- */
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/regdef.h>
-#include <asm/sni.h>
-#include <asm/stackframe.h>
-
-/*
- * The PCI ASIC has the nasty property that it may delay writes if it is busy.
- * As a consequence from writes that have not graduated when we exit from the
- * interrupt handler we might catch a spurious interrupt. To avoid this we
- * force the PCI ASIC to graduate all writes by executing a read from the
- * PCI bus.
- */
- .set noreorder
- .set noat
- .align 5
- NESTED(sni_rm200_pci_handle_int, PT_SIZE, sp)
- SAVE_ALL
- CLI
- .set at
-
- /* Blinken light ... */
- lb t0, led_cache
- addiu t0, 1
- sb t0, led_cache
- sb t0, PCIMT_CSLED # write only register
- .data
-led_cache: .byte 0
- .text
-
- mfc0 t0, CP0_STATUS
- mfc0 t1, CP0_CAUSE
- and t0, t1
-
- andi t1, t0, 0x0800 # hardware interrupt 1
- bnez t1, _hwint1
- andi t1, t0, 0x4000 # hardware interrupt 4
- bnez t1, _hwint4
- andi t1, t0, 0x2000 # hardware interrupt 3
- bnez t1, _hwint3
- andi t1, t0, 0x1000 # hardware interrupt 2
- bnez t1, _hwint2
- andi t1, t0, 0x8000 # hardware interrupt 5
- bnez t1, _hwint5
- andi t1, t0, 0x0400 # hardware interrupt 0
- bnez t1, _hwint0
- nop
-
- j restore_all # spurious interrupt
- nop
-
- ##############################################################################
-
-/* hwint0 should deal with MP agent, ASIC PCI, EISA NMI and debug
- button interrupts. */
-_hwint0: jal pciasic_hwint0
- move a0, sp
- j ret_from_irq
- nop
-
-/*
- * hwint 1 deals with EISA and SCSI interrupts
- */
-_hwint1: jal pciasic_hwint1
- move a0, sp
- j ret_from_irq
- nop
-
-
-/*
- * This interrupt was used for the com1 console on the first prototypes;
- * it's unsed otherwise
- */
-_hwint2: jal pciasic_hwint2
- move a0, sp
- j ret_from_irq
- nop
-
-/*
- * hwint 3 are the PCI interrupts A - D
- */
-_hwint3: jal pciasic_hwint3
- move a0, sp
- j ret_from_irq
- nop
-
-/*
- * hwint 4 is used for only the onboard PCnet 32.
- */
-_hwint4: jal pciasic_hwint4
- move a0, sp
- j ret_from_irq
- nop
-
-/* hwint5 is the r4k count / compare interrupt */
-_hwint5: jal pciasic_hwint5
- move a0, sp
- j ret_from_irq
- nop
-
- END(sni_rm200_pci_handle_int)
DEFINE_SPINLOCK(pciasic_lock);
-extern asmlinkage void sni_rm200_pci_handle_int(void);
-
static void enable_pciasic_irq(unsigned int irq)
{
unsigned int mask = 1 << (irq - PCIMT_IRQ_INT2);
* hwint0 should deal with MP agent, ASIC PCI, EISA NMI and debug
* button interrupts. Later ...
*/
-void pciasic_hwint0(struct pt_regs *regs)
+static void pciasic_hwint0(struct pt_regs *regs)
{
panic("Received int0 but no handler yet ...");
}
/* This interrupt was used for the com1 console on the first prototypes. */
-void pciasic_hwint2(struct pt_regs *regs)
+static void pciasic_hwint2(struct pt_regs *regs)
{
/* I think this shouldn't happen on production machines. */
panic("hwint2 and no handler yet");
}
/* hwint5 is the r4k count / compare interrupt */
-void pciasic_hwint5(struct pt_regs *regs)
+static void pciasic_hwint5(struct pt_regs *regs)
{
panic("hwint5 and no handler yet");
}
*
* The EISA_INT bit in CSITPEND is high active, all others are low active.
*/
-void pciasic_hwint1(struct pt_regs *regs)
+static void pciasic_hwint1(struct pt_regs *regs)
{
u8 pend = *(volatile char *)PCIMT_CSITPEND;
unsigned long flags;
/*
* hwint 3 should deal with the PCI A - D interrupts,
*/
-void pciasic_hwint3(struct pt_regs *regs)
+static void pciasic_hwint3(struct pt_regs *regs)
{
u8 pend = *(volatile char *)PCIMT_CSITPEND;
int irq;
/*
* hwint 4 is used for only the onboard PCnet 32.
*/
-void pciasic_hwint4(struct pt_regs *regs)
+static void pciasic_hwint4(struct pt_regs *regs)
{
clear_c0_status(IE_IRQ4);
do_IRQ(PCIMT_IRQ_ETHERNET, regs);
set_c0_status(IE_IRQ4);
}
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int pending = read_c0_status() & read_c0_cause();
+ static unsigned char led_cache;
+
+ *(volatile unsigned char *) PCIMT_CSLED = ++led_cache;
+
+ if (pending & 0x0800)
+ pciasic_hwint1(regs);
+ else if (pending & 0x4000)
+ pciasic_hwint4(regs);
+ else if (pending & 0x2000)
+ pciasic_hwint3(regs);
+ else if (pending & 0x1000)
+ pciasic_hwint2(regs);
+ else if (pending & 0x8000)
+ pciasic_hwint5(regs);
+ else if (pending & 0x0400)
+ pciasic_hwint0(regs);
+}
+
void __init init_pciasic(void)
{
unsigned long flags;
{
int i;
- set_except_vector(0, sni_rm200_pci_handle_int);
-
init_i8259_irqs(); /* Integrated i8259 */
init_pciasic();
# unless it's something special (ie not a .c file).
#
-obj-y += tx4927_prom.o tx4927_setup.o tx4927_irq.o tx4927_irq_handler.o
+obj-y += tx4927_prom.o tx4927_setup.o tx4927_irq.o
obj-$(CONFIG_TOSHIBA_FPCIB0) += smsc_fdc37m81x.o
obj-$(CONFIG_KGDB) += tx4927_dbgio.o
*/
void __init tx4927_irq_init(void)
{
- extern asmlinkage void tx4927_irq_handler(void);
-
TX4927_IRQ_DPRINTK(TX4927_IRQ_INIT, "-\n");
TX4927_IRQ_DPRINTK(TX4927_IRQ_INIT, "=Calling tx4927_irq_cp0_init()\n");
TX4927_IRQ_DPRINTK(TX4927_IRQ_INIT, "=Calling tx4927_irq_pic_init()\n");
tx4927_irq_pic_init();
- TX4927_IRQ_DPRINTK(TX4927_IRQ_INIT,
- "=Calling set_except_vector(tx4927_irq_handler)\n");
- set_except_vector(0, tx4927_irq_handler);
-
TX4927_IRQ_DPRINTK(TX4927_IRQ_INIT, "+\n");
return;
}
-int tx4927_irq_nested(void)
+static int tx4927_irq_nested(void)
{
int sw_irq = 0;
u32 level2;
return (sw_irq);
}
+
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int pending = read_c0_status() & read_c0_cause();
+
+ if (pending & STATUSF_IP7) /* cpu timer */
+ do_IRQ(TX4927_IRQ_CPU_TIMER, regs);
+ else if (pending & STATUSF_IP2) { /* tx4927 pic */
+ unsigned int irq = tx4927_irq_nested();
+
+ if (unlikely(irq == 0)) {
+ spurious_interrupt(regs);
+ return;
+ }
+ do_IRQ(irq, regs);
+ } else if (pending & STATUSF_IP0) /* user line 0 */
+ do_IRQ(TX4927_IRQ_USER0, regs);
+ else if (pending & STATUSF_IP1) /* user line 1 */
+ do_IRQ(TX4927_IRQ_USER1, regs);
+ else
+ spurious_interrupt(regs);
+}
+++ /dev/null
-/*
- * linux/arch/mips/tx4927/common/tx4927_irq_handler.S
- *
- * Primary interrupt handler for tx4927 based systems
- *
- * Author: MontaVista Software, Inc.
- * Author: jsun@mvista.com or jsun@junsun.net
- * source@mvista.com
- *
- * Copyright 2001-2002 MontaVista Software Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
- * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/addrspace.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-#include <asm/tx4927/tx4927.h>
-
- .align 5
- NESTED(tx4927_irq_handler, PT_SIZE, sp)
- SAVE_ALL
- CLI
- .set at
-
- mfc0 t0, CP0_CAUSE
- mfc0 t1, CP0_STATUS
- and t0, t1
-
- andi t1, t0, STATUSF_IP7 /* cpu timer */
- bnez t1, ll_ip7
-
- /* IP6..IP3 multiplexed -- do not use */
-
- andi t1, t0, STATUSF_IP2 /* tx4927 pic */
- bnez t1, ll_ip2
-
- andi t1, t0, STATUSF_IP0 /* user line 0 */
- bnez t1, ll_ip0
-
- andi t1, t0, STATUSF_IP1 /* user line 1 */
- bnez t1, ll_ip1
-
- .set reorder
-
- /* wrong alarm or masked ... */
- jal spurious_interrupt
- nop
- j ret_from_irq
- END(tx4927_irq_handler)
-
- .align 5
-
-
-ll_ip7:
- li a0, TX4927_IRQ_CPU_TIMER
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_ip2:
- jal tx4927_irq_nested
- nop
- beqz v0, goto_spurious_interrupt
- nop
- move a0, v0
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-goto_spurious_interrupt:
- j spurious_interrupt
- nop
-
-ll_ip1:
- li a0, TX4927_IRQ_USER1
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_ip0:
- li a0, TX4927_IRQ_USER0
- move a1, sp
- jal do_IRQ
- j ret_from_irq
# unless it's something special (ie not a .c file).
#
-obj-y += prom.o setup.o irq.o irq_handler.o rtc_rx5c348.o
+obj-y += prom.o setup.o irq.o rtc_rx5c348.o
obj-$(CONFIG_KGDB) += dbgio.o
void __init
tx4938_irq_init(void)
{
- extern asmlinkage void tx4938_irq_handler(void);
-
tx4938_irq_cp0_init();
tx4938_irq_pic_init();
- set_except_vector(0, tx4938_irq_handler);
return;
}
wbflush();
return (sw_irq);
}
+
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int pending = read_c0_cause() & read_c0_status();
+
+ if (pending & STATUSF_IP7)
+ do_IRQ(TX4938_IRQ_CPU_TIMER, regs);
+ else if (pending & STATUSF_IP2) {
+ int irq = tx4938_irq_nested();
+ if (irq)
+ do_IRQ(irq, regs);
+ else
+ spurious_interrupt(regs);
+ } else if (pending & STATUSF_IP1)
+ do_IRQ(TX4938_IRQ_USER1, regs);
+ else if (pending & STATUSF_IP0)
+ do_IRQ(TX4938_IRQ_USER0, regs);
+}
+++ /dev/null
-/*
- * linux/arch/mips/tx4938/common/handler.S
- *
- * Primary interrupt handler for tx4938 based systems
- * Copyright (C) 2000-2001 Toshiba Corporation
- *
- * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the
- * terms of the GNU General Public License version 2. This program is
- * licensed "as is" without any warranty of any kind, whether express
- * or implied.
- *
- * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com)
- */
-#include <asm/asm.h>
-#include <asm/mipsregs.h>
-#include <asm/addrspace.h>
-#include <asm/regdef.h>
-#include <asm/stackframe.h>
-#include <asm/tx4938/rbtx4938.h>
-
-
- .align 5
- NESTED(tx4938_irq_handler, PT_SIZE, sp)
- SAVE_ALL
- CLI
- .set at
-
- mfc0 t0, CP0_CAUSE
- mfc0 t1, CP0_STATUS
- and t0, t1
-
- andi t1, t0, STATUSF_IP7 /* cpu timer */
- bnez t1, ll_ip7
-
- /* IP6..IP3 multiplexed -- do not use */
-
- andi t1, t0, STATUSF_IP2 /* tx4938 pic */
- bnez t1, ll_ip2
-
- andi t1, t0, STATUSF_IP1 /* user line 1 */
- bnez t1, ll_ip1
-
- andi t1, t0, STATUSF_IP0 /* user line 0 */
- bnez t1, ll_ip0
-
- .set reorder
-
- nop
- END(tx4938_irq_handler)
-
- .align 5
-
-
-ll_ip7:
- li a0, TX4938_IRQ_CPU_TIMER
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-
-ll_ip2:
- jal tx4938_irq_nested
- nop
- beqz v0, goto_spurious_interrupt
- nop
- move a0, v0
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-goto_spurious_interrupt:
- j ret_from_irq
-
-ll_ip1:
- li a0, TX4938_IRQ_USER1
- move a1, sp
- jal do_IRQ
- j ret_from_irq
-
-ll_ip0:
- li a0, TX4938_IRQ_USER0
- move a1, sp
- jal do_IRQ
- j ret_from_irq
# Makefile for common code of the NEC VR4100 series.
#
-obj-y += bcu.o cmu.o icu.o init.o int-handler.o irq.o pmu.o type.o
+obj-y += bcu.o cmu.o icu.o init.o irq.o pmu.o type.o
obj-$(CONFIG_VRC4173) += vrc4173.o
EXTRA_AFLAGS := $(CFLAGS)
+++ /dev/null
-/*
- * FILE NAME
- * arch/mips/vr41xx/common/int-handler.S
- *
- * BRIEF MODULE DESCRIPTION
- * Interrupt dispatcher for the NEC VR4100 series.
- *
- * Author: Yoichi Yuasa
- * yyuasa@mvista.com or source@mvista.com
- *
- * Copyright 2001 MontaVista Software Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
- * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
- * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-/*
- * Changes:
- * MontaVista Software Inc. <yyuasa@mvista.com> or <source@mvista.com>
- * - New creation, NEC VR4100 series are supported.
- *
- * Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
- * - Coped with INTASSIGN of NEC VR4133.
- */
-#include <asm/asm.h>
-#include <asm/regdef.h>
-#include <asm/mipsregs.h>
-#include <asm/stackframe.h>
-
- .text
- .set noreorder
-
- .align 5
- NESTED(vr41xx_handle_interrupt, PT_SIZE, ra)
- .set noat
- SAVE_ALL
- CLI
- .set at
- .set noreorder
-
- /*
- * Get the pending interrupts
- */
- mfc0 t0, CP0_CAUSE
- mfc0 t1, CP0_STATUS
- andi t0, 0xff00
- and t0, t0, t1
-
- andi t1, t0, CAUSEF_IP7 # MIPS timer interrupt
- bnez t1, handle_irq
- li a0, 7
-
- andi t1, t0, 0x7800 # check for Int1-4
- beqz t1, 1f
-
- andi t1, t0, CAUSEF_IP3 # check for Int1
- bnez t1, handle_int
- li a0, 3
-
- andi t1, t0, CAUSEF_IP4 # check for Int2
- bnez t1, handle_int
- li a0, 4
-
- andi t1, t0, CAUSEF_IP5 # check for Int3
- bnez t1, handle_int
- li a0, 5
-
- andi t1, t0, CAUSEF_IP6 # check for Int4
- bnez t1, handle_int
- li a0, 6
-
-1:
- andi t1, t0, CAUSEF_IP2 # check for Int0
- bnez t1, handle_int
- li a0, 2
-
- andi t1, t0, CAUSEF_IP0 # check for IP0
- bnez t1, handle_irq
- li a0, 0
-
- andi t1, t0, CAUSEF_IP1 # check for IP1
- bnez t1, handle_irq
- li a0, 1
-
- jal spurious_interrupt
- nop
- j ret_from_irq
- nop
-
-handle_int:
- jal irq_dispatch
- move a1, sp
- j ret_from_irq
- nop
-
-handle_irq:
- jal do_IRQ
- move a1, sp
- j ret_from_irq
- END(vr41xx_handle_interrupt)
EXPORT_SYMBOL_GPL(cascade_irq);
-asmlinkage void irq_dispatch(unsigned int irq, struct pt_regs *regs)
+static void irq_dispatch(unsigned int irq, struct pt_regs *regs)
{
irq_cascade_t *cascade;
irq_desc_t *desc;
do_IRQ(irq, regs);
}
-extern asmlinkage void vr41xx_handle_interrupt(void);
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+ unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
+
+ if (pending & CAUSEF_IP7)
+ do_IRQ(7, regs);
+ else if (pending & 0x7800) {
+ if (pending & CAUSEF_IP3)
+ irq_dispatch(3, regs);
+ else if (pending & CAUSEF_IP4)
+ irq_dispatch(4, regs);
+ else if (pending & CAUSEF_IP5)
+ irq_dispatch(5, regs);
+ else if (pending & CAUSEF_IP6)
+ irq_dispatch(6, regs);
+ } else if (pending & CAUSEF_IP2)
+ irq_dispatch(2, regs);
+ else if (pending & CAUSEF_IP0)
+ do_IRQ(0, regs);
+ else if (pending & CAUSEF_IP1)
+ do_IRQ(1, regs);
+ else
+ spurious_interrupt(regs);
+}
void __init arch_init_irq(void)
{
mips_cpu_irq_init(MIPS_CPU_IRQ_BASE);
-
- set_except_vector(0, vr41xx_handle_interrupt);
}
projects / linux-2.6-omap-h63xx.git / commitdiff