From bc94081c6ac823c4723d8e36e9604c6cf3eba0ef Mon Sep 17 00:00:00 2001 From: Catalin Marinas Date: Tue, 22 Apr 2014 16:14:28 +0100 Subject: ARM: 8035/1: Disable preemption in crunch_task_enable() This patch is in preparation for calling the crunch_task_enable() function with interrupts enabled. Signed-off-by: Catalin Marinas Cc: Hartley Sweeten Cc: Ryan Mallon Signed-off-by: Russell King --- arch/arm/mach-ep93xx/crunch-bits.S | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) (limited to 'arch/arm/mach-ep93xx') diff --git a/arch/arm/mach-ep93xx/crunch-bits.S b/arch/arm/mach-ep93xx/crunch-bits.S index 0ec9bb48fab9..eaa5e34729d3 100644 --- a/arch/arm/mach-ep93xx/crunch-bits.S +++ b/arch/arm/mach-ep93xx/crunch-bits.S @@ -16,6 +16,7 @@ #include #include #include +#include #include /* @@ -65,11 +66,13 @@ * called from prefetch exception handler with interrupts disabled */ ENTRY(crunch_task_enable) + inc_preempt_count r10, r3 + ldr r8, =(EP93XX_APB_VIRT_BASE + 0x00130000) @ syscon addr ldr r1, [r8, #0x80] tst r1, #0x00800000 @ access to crunch enabled? - movne pc, lr @ if so no business here + bne 2f @ if so no business here mov r3, #0xaa @ unlock syscon swlock str r3, [r8, #0xc0] orr r1, r1, #0x00800000 @ enable access to crunch @@ -142,7 +145,7 @@ crunch_save: teq r0, #0 @ anything to load? cfldr64eq mvdx0, [r1, #CRUNCH_MVDX0] @ mvdx0 was clobbered - moveq pc, lr + beq 1f crunch_load: cfldr64 mvdx0, [r0, #CRUNCH_DSPSC] @ load status word @@ -190,6 +193,11 @@ crunch_load: cfldr64 mvdx14, [r0, #CRUNCH_MVDX14] cfldr64 mvdx15, [r0, #CRUNCH_MVDX15] +1: +#ifdef CONFIG_PREEMPT_COUNT + get_thread_info r10 +#endif +2: dec_preempt_count r10, r3 mov pc, lr /* -- cgit