| Message ID | 1361961363-28412-1-git-send-email-inderpal.singh@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Inderpal Singh wrote: > > 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 <inderpal.singh@linaro.org> > --- > changes in v2: > - check processor midr instead of checking all soc ids as > suggested by Kukjin > > changes in v3: > - simplify by reading midr in assembly as per Russell > > arch/arm/plat-samsung/s5p-sleep.S | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/arch/arm/plat-samsung/s5p-sleep.S b/arch/arm/plat-samsung/s5p- > sleep.S > index bdf6dad..6e15993 100644 > --- a/arch/arm/plat-samsung/s5p-sleep.S > +++ b/arch/arm/plat-samsung/s5p-sleep.S > @@ -25,6 +25,9 @@ > #include <asm/asm-offsets.h> > #include <asm/hardware/cache-l2x0.h> > > +#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] > -- > 1.7.9.5 Looks good to me, applied. Thanks. - Kukjin
diff --git a/arch/arm/plat-samsung/s5p-sleep.S b/arch/arm/plat-samsung/s5p-sleep.S index bdf6dad..6e15993 100644 --- a/arch/arm/plat-samsung/s5p-sleep.S +++ b/arch/arm/plat-samsung/s5p-sleep.S @@ -25,6 +25,9 @@ #include <asm/asm-offsets.h> #include <asm/hardware/cache-l2x0.h> +#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]
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 <inderpal.singh@linaro.org> --- changes in v2: - check processor midr instead of checking all soc ids as suggested by Kukjin changes in v3: - simplify by reading midr in assembly as per Russell arch/arm/plat-samsung/s5p-sleep.S | 9 +++++++++ 1 file changed, 9 insertions(+)