From 531c633d2be8e79087335a46d3c017ca5837e588 Mon Sep 17 00:00:00 2001 From: Bob Moore Date: Wed, 18 Feb 2009 14:06:12 +0800 Subject: [PATCH] ACPICA: Split out PM1 status registers from the FADT Add new globals for the PM1 status registers (A/B), similar to the way the PM1 enable registers are handled. Instead of overloading the FADT Event Register blocks. This makes the code clearer and less prone to error. Signed-off-by: Bob Moore Signed-off-by: Lin Ming Signed-off-by: Len Brown --- drivers/acpi/acpica/acglobal.h | 5 +- drivers/acpi/acpica/hwregs.c | 18 +-- drivers/acpi/acpica/tbfadt.c | 246 ++++++++++++++++++--------------- 3 files changed, 147 insertions(+), 122 deletions(-) diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h index 634fb0785e7..f3e87ba43db 100644 --- a/drivers/acpi/acpica/acglobal.h +++ b/drivers/acpi/acpica/acglobal.h @@ -148,9 +148,12 @@ ACPI_EXTERN struct acpi_internal_rsdt acpi_gbl_root_table_list; ACPI_EXTERN struct acpi_table_fadt acpi_gbl_FADT; ACPI_EXTERN struct acpi_table_facs *acpi_gbl_FACS; -/* These addresses are calculated from FADT address values */ +/* These addresses are calculated from the FADT Event Block addresses */ +ACPI_EXTERN struct acpi_generic_address acpi_gbl_xpm1a_status; ACPI_EXTERN struct acpi_generic_address acpi_gbl_xpm1a_enable; + +ACPI_EXTERN struct acpi_generic_address acpi_gbl_xpm1b_status; ACPI_EXTERN struct acpi_generic_address acpi_gbl_xpm1b_enable; /* diff --git a/drivers/acpi/acpica/hwregs.c b/drivers/acpi/acpica/hwregs.c index 4dc43b01851..7ef0b8eadbc 100644 --- a/drivers/acpi/acpica/hwregs.c +++ b/drivers/acpi/acpica/hwregs.c @@ -72,21 +72,23 @@ acpi_status acpi_hw_clear_acpi_status(void) ACPI_DEBUG_PRINT((ACPI_DB_IO, "About to write %04X to %04X\n", ACPI_BITMASK_ALL_FIXED_STATUS, - (u16) acpi_gbl_FADT.xpm1a_event_block.address)); + (u16) acpi_gbl_xpm1a_status.address)); lock_flags = acpi_os_acquire_lock(acpi_gbl_hardware_lock); + /* Clear the fixed events */ + status = acpi_hw_register_write(ACPI_REGISTER_PM1_STATUS, ACPI_BITMASK_ALL_FIXED_STATUS); if (ACPI_FAILURE(status)) { goto unlock_and_exit; } - /* Clear the fixed events */ + /* Write PM1B register if present */ - if (acpi_gbl_FADT.xpm1b_event_block.address) { + if (acpi_gbl_xpm1b_status.address) { status = acpi_write(ACPI_BITMASK_ALL_FIXED_STATUS, - &acpi_gbl_FADT.xpm1b_event_block); + &acpi_gbl_xpm1b_status); if (ACPI_FAILURE(status)) { goto unlock_and_exit; } @@ -150,14 +152,14 @@ acpi_hw_register_read(u32 register_id, u32 * return_value) switch (register_id) { case ACPI_REGISTER_PM1_STATUS: /* 16-bit access */ - status = acpi_read(&value1, &acpi_gbl_FADT.xpm1a_event_block); + status = acpi_read(&value1, &acpi_gbl_xpm1a_status); if (ACPI_FAILURE(status)) { goto exit; } /* PM1B is optional */ - status = acpi_read(&value2, &acpi_gbl_FADT.xpm1b_event_block); + status = acpi_read(&value2, &acpi_gbl_xpm1b_status); value1 |= value2; break; @@ -267,14 +269,14 @@ acpi_status acpi_hw_register_write(u32 register_id, u32 value) /* Now we can write the data */ - status = acpi_write(value, &acpi_gbl_FADT.xpm1a_event_block); + status = acpi_write(value, &acpi_gbl_xpm1a_status); if (ACPI_FAILURE(status)) { goto exit; } /* PM1B is optional */ - status = acpi_write(value, &acpi_gbl_FADT.xpm1b_event_block); + status = acpi_write(value, &acpi_gbl_xpm1b_status); break; case ACPI_REGISTER_PM1_ENABLE: /* 16-bit access */ diff --git a/drivers/acpi/acpica/tbfadt.c b/drivers/acpi/acpica/tbfadt.c index 4b683ccd4a9..a8191efd9aa 100644 --- a/drivers/acpi/acpica/tbfadt.c +++ b/drivers/acpi/acpica/tbfadt.c @@ -57,6 +57,8 @@ static void acpi_tb_convert_fadt(void); static void acpi_tb_validate_fadt(void); +static void acpi_tb_setup_fadt_registers(void); + /* Table for conversion of FADT to common internal format and FADT validation */ typedef struct acpi_fadt_info { @@ -132,6 +134,35 @@ static struct acpi_fadt_info fadt_info_table[] = { #define ACPI_FADT_INFO_ENTRIES (sizeof (fadt_info_table) / sizeof (struct acpi_fadt_info)) +/* Table used to split Event Blocks into separate status/enable registers */ + +typedef struct acpi_fadt_pm_info { + struct acpi_generic_address *target; + u8 source; + u8 register_num; + +} acpi_fadt_pm_info; + +static struct acpi_fadt_pm_info fadt_pm_info_table[] = { + {&acpi_gbl_xpm1a_status, + ACPI_FADT_OFFSET(xpm1a_event_block), + 0}, + + {&acpi_gbl_xpm1a_enable, + ACPI_FADT_OFFSET(xpm1a_event_block), + 1}, + + {&acpi_gbl_xpm1b_status, + ACPI_FADT_OFFSET(xpm1b_event_block), + 0}, + + {&acpi_gbl_xpm1b_enable, + ACPI_FADT_OFFSET(xpm1b_event_block), + 1} +}; + +#define ACPI_FADT_PM_INFO_ENTRIES (sizeof (fadt_pm_info_table) / sizeof (struct acpi_fadt_pm_info)) + /******************************************************************************* * * FUNCTION: acpi_tb_init_generic_address @@ -207,7 +238,7 @@ void acpi_tb_parse_fadt(u32 table_index) */ (void)acpi_tb_verify_checksum(table, length); - /* Obtain a local copy of the FADT in common ACPI 2.0+ format */ + /* Create a local copy of the FADT in common ACPI 2.0+ format */ acpi_tb_create_local_fadt(table, length); @@ -265,11 +296,17 @@ void acpi_tb_create_local_fadt(struct acpi_table_header *table, u32 length) ACPI_MEMCPY(&acpi_gbl_FADT, table, ACPI_MIN(length, sizeof(struct acpi_table_fadt))); - /* - * 1) Convert the local copy of the FADT to the common internal format - * 2) Validate some of the important values within the FADT - */ + /* Convert the local copy of the FADT to the common internal format */ + acpi_tb_convert_fadt(); + + /* Validate FADT values now, before we make any changes */ + + acpi_tb_validate_fadt(); + + /* Initialize the global ACPI register structures */ + + acpi_tb_setup_fadt_registers(); } /******************************************************************************* @@ -303,8 +340,6 @@ void acpi_tb_create_local_fadt(struct acpi_table_header *table, u32 length) static void acpi_tb_convert_fadt(void) { - u8 pm1_register_bit_width; - u8 pm1_register_byte_width; struct acpi_generic_address *target64; u32 i; @@ -379,112 +414,6 @@ static void acpi_tb_convert_fadt(void) address32)); } } - - /* Validate FADT values now, before we make any changes */ - - acpi_tb_validate_fadt(); - - /* - * Optionally check all register lengths against the default values and - * update them if they are incorrect. - */ - if (acpi_gbl_use_default_register_widths) { - for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) { - target64 = - ACPI_ADD_PTR(struct acpi_generic_address, - &acpi_gbl_FADT, - fadt_info_table[i].address64); - - /* - * If a valid register (Address != 0) and the (default_length > 0) - * (Not a GPE register), then check the width against the default. - */ - if ((target64->address) && - (fadt_info_table[i].default_length > 0) && - (fadt_info_table[i].default_length != - target64->bit_width)) { - ACPI_WARNING((AE_INFO, - "Invalid length for %s: %d, using default %d", - fadt_info_table[i].name, - target64->bit_width, - fadt_info_table[i]. - default_length)); - - /* Incorrect size, set width to the default */ - - target64->bit_width = - fadt_info_table[i].default_length; - } - } - } - - /* - * Get the length of the individual PM1 registers (enable and status). - * Each register is defined to be (event block length / 2). - */ - pm1_register_bit_width = - (u8)ACPI_DIV_2(acpi_gbl_FADT.xpm1a_event_block.bit_width); - pm1_register_byte_width = (u8)ACPI_DIV_8(pm1_register_bit_width); - - /* - * Adjust the lengths of the PM1 Event Blocks so that they can be used to - * access the PM1 status register(s). Use (width / 2) - */ - acpi_gbl_FADT.xpm1a_event_block.bit_width = pm1_register_bit_width; - acpi_gbl_FADT.xpm1b_event_block.bit_width = pm1_register_bit_width; - - /* - * Calculate separate GAS structs for the PM1 Enable registers. - * These addresses do not appear (directly) in the FADT, so it is - * useful to calculate them once, here. - * - * The PM event blocks are split into two register blocks, first is the - * PM Status Register block, followed immediately by the PM Enable - * Register block. Each is of length (xpm1x_event_block.bit_width/2). - * - * On various systems the v2 fields (and particularly the bit widths) - * cannot be relied upon, though. Hence resort to using the v1 length - * here (and warn about the inconsistency). - */ - if (acpi_gbl_FADT.xpm1a_event_block.bit_width - != acpi_gbl_FADT.pm1_event_length * 8) - printk(KERN_WARNING "FADT: " - "X_PM1a_EVT_BLK.bit_width (%u) does not match" - " PM1_EVT_LEN (%u)\n", - acpi_gbl_FADT.xpm1a_event_block.bit_width, - acpi_gbl_FADT.pm1_event_length); - - /* The PM1A register block is required */ - - acpi_tb_init_generic_address(&acpi_gbl_xpm1a_enable, - acpi_gbl_FADT.xpm1a_event_block.space_id, - pm1_register_byte_width, - (acpi_gbl_FADT.xpm1a_event_block.address + - pm1_register_byte_width)); - /* Don't forget to copy space_id of the GAS */ - acpi_gbl_xpm1a_enable.space_id = - acpi_gbl_FADT.xpm1a_event_block.space_id; - - /* The PM1B register block is optional, ignore if not present */ - - if (acpi_gbl_FADT.xpm1b_event_block.address) { - if (acpi_gbl_FADT.xpm1b_event_block.bit_width - != acpi_gbl_FADT.pm1_event_length * 8) - printk(KERN_WARNING "FADT: " - "X_PM1b_EVT_BLK.bit_width (%u) does not match" - " PM1_EVT_LEN (%u)\n", - acpi_gbl_FADT.xpm1b_event_block.bit_width, - acpi_gbl_FADT.pm1_event_length); - acpi_tb_init_generic_address(&acpi_gbl_xpm1b_enable, - acpi_gbl_FADT.xpm1b_event_block.space_id, - pm1_register_byte_width, - (acpi_gbl_FADT.xpm1b_event_block. - address + pm1_register_byte_width)); - /* Don't forget to copy space_id of the GAS */ - acpi_gbl_xpm1b_enable.space_id = - acpi_gbl_FADT.xpm1b_event_block.space_id; - - } } /****************************************************************************** @@ -607,3 +536,94 @@ static void acpi_tb_validate_fadt(void) } } } + +/****************************************************************************** + * + * FUNCTION: acpi_tb_setup_fadt_registers + * + * PARAMETERS: None, uses acpi_gbl_FADT. + * + * RETURN: None + * + * DESCRIPTION: Initialize global ACPI PM1 register definitions. Optionally, + * force FADT register definitions to their default lengths. + * + ******************************************************************************/ + +static void acpi_tb_setup_fadt_registers(void) +{ + struct acpi_generic_address *target64; + struct acpi_generic_address *source64; + u8 pm1_register_byte_width; + u32 i; + + /* + * Optionally check all register lengths against the default values and + * update them if they are incorrect. + */ + if (acpi_gbl_use_default_register_widths) { + for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++) { + target64 = + ACPI_ADD_PTR(struct acpi_generic_address, + &acpi_gbl_FADT, + fadt_info_table[i].address64); + + /* + * If a valid register (Address != 0) and the (default_length > 0) + * (Not a GPE register), then check the width against the default. + */ + if ((target64->address) && + (fadt_info_table[i].default_length > 0) && + (fadt_info_table[i].default_length != + target64->bit_width)) { + ACPI_WARNING((AE_INFO, + "Invalid length for %s: %d, using default %d", + fadt_info_table[i].name, + target64->bit_width, + fadt_info_table[i]. + default_length)); + + /* Incorrect size, set width to the default */ + + target64->bit_width = + fadt_info_table[i].default_length; + } + } + } + + /* + * Get the length of the individual PM1 registers (enable and status). + * Each register is defined to be (event block length / 2). Extra divide + * by 8 converts bits to bytes. + */ + pm1_register_byte_width = + (u8)ACPI_DIV_16(acpi_gbl_FADT.xpm1a_event_block.bit_width); + + /* + * Calculate separate GAS structs for the PM1x (A/B) Status and Enable + * registers. These addresses do not appear (directly) in the FADT, so it + * is useful to pre-calculate them from the PM1 Event Block definitions. + * + * The PM event blocks are split into two register blocks, first is the + * PM Status Register block, followed immediately by the PM Enable + * Register block. Each is of length (pm1_event_length/2) + * + * Note: The PM1A event block is required by the ACPI specification. + * However, the PM1B event block is optional and is rarely, if ever, + * used. + */ + + for (i = 0; i < ACPI_FADT_PM_INFO_ENTRIES; i++) { + source64 = + ACPI_ADD_PTR(struct acpi_generic_address, &acpi_gbl_FADT, + fadt_pm_info_table[i].source); + + acpi_tb_init_generic_address(fadt_pm_info_table[i].target, + source64->space_id, + pm1_register_byte_width, + source64->address + + (fadt_pm_info_table[i]. + register_num * + pm1_register_byte_width)); + } +} -- 2.41.1