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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-09-22 20:54:53 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-09-22 21:01:40 +0100 |
| commit | ae19ffbadc1b2100285a5b5b3d0a4e0a11390904 (patch) | |
| tree | 3c2086ab67398a019089a47ca3f362a4bc6db74f /arch/arm/kernel/entry-header.S | |
| parent | 34e84f39a27d059a3e6ec6e8b94aafa702e6f220 (diff) | |
| parent | 9173a8ef24a6b1b8031507b35b8ffe5f85a87692 (diff) | |
Merge branch 'master' into for-linus
Diffstat (limited to 'arch/arm/kernel/entry-header.S')
| -rw-r--r-- | arch/arm/kernel/entry-header.S | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/arm/kernel/entry-header.S b/arch/arm/kernel/entry-header.S index a4eaf4f920c..e17e3c30d95 100644 --- a/arch/arm/kernel/entry-header.S +++ b/arch/arm/kernel/entry-header.S @@ -76,13 +76,25 @@ #ifndef CONFIG_THUMB2_KERNEL .macro svc_exit, rpsr msr spsr_cxsf, \rpsr +#if defined(CONFIG_CPU_32v6K) + clrex @ clear the exclusive monitor ldmia sp, {r0 - pc}^ @ load r0 - pc, cpsr +#elif defined (CONFIG_CPU_V6) + ldr r0, [sp] + strex r1, r2, [sp] @ clear the exclusive monitor + ldmib sp, {r1 - pc}^ @ load r1 - pc, cpsr +#endif .endm .macro restore_user_regs, fast = 0, offset = 0 ldr r1, [sp, #\offset + S_PSR] @ get calling cpsr ldr lr, [sp, #\offset + S_PC]! @ get pc msr spsr_cxsf, r1 @ save in spsr_svc +#if defined(CONFIG_CPU_32v6K) + clrex @ clear the exclusive monitor +#elif defined (CONFIG_CPU_V6) + strex r1, r2, [sp] @ clear the exclusive monitor +#endif .if \fast ldmdb sp, {r1 - lr}^ @ get calling r1 - lr .else @@ -98,6 +110,7 @@ .endm #else /* CONFIG_THUMB2_KERNEL */ .macro svc_exit, rpsr + clrex @ clear the exclusive monitor ldr r0, [sp, #S_SP] @ top of the stack ldr r1, [sp, #S_PC] @ return address tst r0, #4 @ orig stack 8-byte aligned? @@ -110,6 +123,7 @@ .endm .macro restore_user_regs, fast = 0, offset = 0 + clrex @ clear the exclusive monitor mov r2, sp load_user_sp_lr r2, r3, \offset + S_SP @ calling sp, lr ldr r1, [sp, #\offset + S_PSR] @ get calling cpsr |