From d9cdeb814fd6bb1b5eaa49c5848f10ba7acf992a Mon Sep 17 00:00:00 2001 From: Inderpal Singh Date: Thu, 4 Apr 2013 16:01:15 +0900 Subject: ARM: SAMSUNG: check processor type before cache restoration in resume Only cortex-a9 based samsung platforms have l2x0 cache controller. Hence check the same before restoring the cache in resume. This is needed for single kernel image. Signed-off-by: Inderpal Singh Signed-off-by: Kukjin Kim --- arch/arm/plat-samsung/s5p-sleep.S | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'arch/arm/plat-samsung') diff --git a/arch/arm/plat-samsung/s5p-sleep.S b/arch/arm/plat-samsung/s5p-sleep.S index bdf6dad..a030e73 100644 --- a/arch/arm/plat-samsung/s5p-sleep.S +++ b/arch/arm/plat-samsung/s5p-sleep.S @@ -25,6 +25,9 @@ #include #include +#define CPU_MASK 0xff0ffff0 +#define CPU_CORTEX_A9 0x410fc090 + /* * The following code is located into the .data section. This is to * allow l2x0_regs_phys to be accessed with a relative load while we @@ -51,6 +54,12 @@ ENTRY(s3c_cpu_resume) #ifdef CONFIG_CACHE_L2X0 + mrc p15, 0, r0, c0, c0, 0 + ldr r1, =CPU_MASK + and r0, r0, r1 + ldr r1, =CPU_CORTEX_A9 + cmp r0, r1 + bne resume_l2on adr r0, l2x0_regs_phys ldr r0, [r0] ldr r1, [r0, #L2X0_R_PHY_BASE] -- cgit v1.1