]> pilppa.com Git - linux-2.6-omap-h63xx.git/commit
powerpc: Introduce VSX thread_struct and CONFIG_VSX
authorMichael Neuling <mikey@neuling.org>
Wed, 25 Jun 2008 04:07:18 +0000 (14:07 +1000)
committerPaul Mackerras <paulus@samba.org>
Tue, 1 Jul 2008 01:28:46 +0000 (11:28 +1000)
commitc6e6771b87d4e339d27f1383c8a808ae9b4ee5b8
tree1900b7350ec685c3a31f2233fd88a57e34725b5c
parent6f3d8e6947ec98e358514fc0f7b2e37fe88a21bb
powerpc: Introduce VSX thread_struct and CONFIG_VSX

The layout of the new VSR registers and how they overlap on top of the
legacy FPR and VR registers is:

                   VSR doubleword 0               VSR doubleword 1
          ----------------------------------------------------------------
  VSR[0]  |             FPR[0]            |                              |
          ----------------------------------------------------------------
  VSR[1]  |             FPR[1]            |                              |
          ----------------------------------------------------------------
          |              ...              |                              |
          |              ...              |                              |
          ----------------------------------------------------------------
  VSR[30] |             FPR[30]           |                              |
          ----------------------------------------------------------------
  VSR[31] |             FPR[31]           |                              |
          ----------------------------------------------------------------
  VSR[32] |                             VR[0]                            |
          ----------------------------------------------------------------
  VSR[33] |                             VR[1]                            |
          ----------------------------------------------------------------
          |                              ...                             |
          |                              ...                             |
          ----------------------------------------------------------------
  VSR[62] |                             VR[30]                           |
          ----------------------------------------------------------------
  VSR[63] |                             VR[31]                           |
          ----------------------------------------------------------------

VSX has 64 128bit registers.  The first 32 regs overlap with the FP
registers and hence extend them with and additional 64 bits.  The
second 32 regs overlap with the VMX registers.

This commit introduces the thread_struct changes required to reflect
this register layout.  Ptrace and signals code is updated so that the
floating point registers are correctly accessed from the thread_struct
when CONFIG_VSX is enabled.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
arch/powerpc/kernel/asm-offsets.c
arch/powerpc/kernel/ptrace.c
arch/powerpc/kernel/signal_32.c
arch/powerpc/kernel/signal_64.c
include/asm-powerpc/processor.h