RTOS/rtems
1
0
Fork 0
forked from Imagelibrary/rtems
Code Pull Requests Activity

powerpc: Add r2 to CPU context

Browse Source 
The r2 may be used for thread-local storage.
This commit is contained in:
Sebastian Huber
2013-06-24 15:21:46 +02:00
parent 8dc2e7bd7e
commit 39a4574652
5 changed files with 20 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
c/src/lib/libcpu/powerpc/new-exceptions/cpu.c
View File

@@ -68,6 +68,7 @@ void _CPU_Context_Initialize(
ppc_context *the_ppc_context;
uint32_t msr_value;
uint32_t sp;
register uint32_t gpr2 __asm__("2");
sp = (uint32_t)stack_base + size - PPC_MINIMUM_STACK_FRAME_SIZE;
@@ -127,6 +128,7 @@ void _CPU_Context_Initialize(
the_ppc_context->gpr1 = sp;
the_ppc_context->msr = msr_value;
the_ppc_context->lr = (uint32_t) entry_point;
the_ppc_context->gpr2 = gpr2;
#ifdef __ALTIVEC__
_CPU_Context_initialize_altivec( the_ppc_context );

6
c/src/lib/libcpu/powerpc/new-exceptions/cpu_asm.S
View File

@@ -23,7 +23,7 @@
* COPYRIGHT (c) 1989-1997.
* On-Line Applications Research Corporation (OAR).
*
* Copyright (c) 2011-2012 embedded brains GmbH.
* Copyright (c) 2011-2013 embedded brains GmbH.
*
* The license and distribution terms for this file may in
* the file LICENSE in this distribution or at
@@ -323,6 +323,8 @@ PROC (_CPU_Context_switch):
PPC_GPR_STORE r30, PPC_CONTEXT_OFFSET_GPR30(r3)
PPC_GPR_STORE r31, PPC_CONTEXT_OFFSET_GPR31(r3)
stw r2, PPC_CONTEXT_OFFSET_GPR2(r3)
/* Restore context from r4 */
restore_context:
@@ -363,6 +365,8 @@ restore_context:
PPC_GPR_LOAD r30, PPC_CONTEXT_OFFSET_GPR30(r4)
PPC_GPR_LOAD r31, PPC_CONTEXT_OFFSET_GPR31(r4)
lwz r2, PPC_CONTEXT_OFFSET_GPR2(r4)
mtcr r7
mtlr r6
mtmsr r5