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authorGreg Ungerer <gerg@uclinux.org>2011-05-05 16:32:12 +0400
committerGreg Ungerer <gerg@uclinux.org>2011-07-25 05:20:40 +0400
commitf941f5caa0e947f4ed060a751ca4a3bf552af625 (patch)
treef6811757e568e74307abd39534b1d7e7813c8d0f /arch/m68k/platform/68360
parent10f939ff3ab80514da3bd96357bb54a8a59b9225 (diff)
downloadlinux-f941f5caa0e947f4ed060a751ca4a3bf552af625.tar.xz
m68k: merge MMU and non MMU versions of system.h
The non-MMU m68k targets can use the same asm/system.h as the MMU targets. So switch the current system_mm.h to be system.h and remove system_no.h. The assembly support code for the non-MMU resume functions needs to be modified to match the now common switch_to() macro. Specifically this means correctly saving and restoring the status flags in the case of the ColdFire resume, and some reordering of the code to not use registers before they are saved or after they are restored. Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Diffstat (limited to 'arch/m68k/platform/68360')
-rw-r--r--arch/m68k/platform/68360/entry.S13
1 files changed, 6 insertions, 7 deletions
diff --git a/arch/m68k/platform/68360/entry.S b/arch/m68k/platform/68360/entry.S
index a07b14feed92..0ede6702127a 100644
--- a/arch/m68k/platform/68360/entry.S
+++ b/arch/m68k/platform/68360/entry.S
@@ -162,22 +162,21 @@ bad_interrupt:
/*
* Beware - when entering resume, prev (the current task) is
- * in a0, next (the new task) is in a1,so don't change these
+ * in a0, next (the new task) is in a1, so don't change these
* registers until their contents are no longer needed.
*/
ENTRY(resume)
movel %a0,%d1 /* save prev thread in d1 */
movew %sr,%a0@(TASK_THREAD+THREAD_SR) /* save sr */
- movel %usp,%a2 /* save usp */
- movel %a2,%a0@(TASK_THREAD+THREAD_USP)
-
SAVE_SWITCH_STACK
movel %sp,%a0@(TASK_THREAD+THREAD_KSP) /* save kernel stack */
+ movel %usp,%a3 /* save usp */
+ movel %a3,%a0@(TASK_THREAD+THREAD_USP)
+
+ movel %a1@(TASK_THREAD+THREAD_USP),%a3 /* restore user stack */
+ movel %a3,%usp
movel %a1@(TASK_THREAD+THREAD_KSP),%sp /* restore new thread stack */
RESTORE_SWITCH_STACK
-
- movel %a1@(TASK_THREAD+THREAD_USP),%a0 /* restore user stack */
- movel %a0,%usp
movew %a1@(TASK_THREAD+THREAD_SR),%sr /* restore thread status reg */
rts