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ARM: tegra: add a flag for tegra_disable_clean_inv_dcache to do LoUIS or ALL 

Adding a flag for tegra_disable_clean_inv_dcache to flush cache as LoUIS
or ALL. After this patch, the v7_flush_dcache_louis is used for CPU hotplug
and CPU suspend in CPU power down (e.g. CPU idle power-down mode) case. And
the v7_flush_dcache_all is used for CPU cluster power down (e.g. suspend to
LP2 mode).

Signed-off-by: Joseph Lo <josephl@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Joseph Lo 2013-07-03 17:50:38 +08:00 committed by Stephen Warren
parent c04c77540a
commit ac2527bfc2
5 changed files with 14 additions and 3 deletions
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2
arch/arm/mach-tegra/hotplug.c
View File

@ -37,7 +37,7 @@ int tegra_cpu_kill(unsigned cpu)
void __ref tegra_cpu_die(unsigned int cpu)
{
/* Clean L1 data cache */
tegra_disable_clean_inv_dcache();
tegra_disable_clean_inv_dcache(TEGRA_FLUSH_CACHE_LOUIS);
/* Shut down the current CPU. */
tegra_hotplug_shutdown();

1
arch/arm/mach-tegra/sleep-tegra20.S
View File

@ -191,6 +191,7 @@ ENTRY(tegra20_sleep_cpu_secondary_finish)
mrc p15, 0, r11, c1, c0, 1 @ save actlr before exiting coherency
/* Flush and disable the L1 data cache */
mov r0, #TEGRA_FLUSH_CACHE_LOUIS
bl tegra_disable_clean_inv_dcache
mov32 r0, TEGRA_PMC_VIRT + PMC_SCRATCH41

1
arch/arm/mach-tegra/sleep-tegra30.S
View File

@ -137,6 +137,7 @@ ENTRY(tegra30_sleep_cpu_secondary_finish)
mov r7, lr
/* Flush and disable the L1 data cache */
mov r0, #TEGRA_FLUSH_CACHE_LOUIS
bl tegra_disable_clean_inv_dcache
/* Powergate this CPU. */

7
arch/arm/mach-tegra/sleep.S
View File

@ -56,7 +56,9 @@ ENTRY(tegra_disable_clean_inv_dcache)
isb
/* Flush the D-cache */
bl v7_flush_dcache_louis
cmp r0, #TEGRA_FLUSH_CACHE_ALL
blne v7_flush_dcache_louis
bleq v7_flush_dcache_all
/* Trun off coherency */
exit_smp r4, r5
@ -73,9 +75,12 @@ ENDPROC(tegra_disable_clean_inv_dcache)
* tegra?_tear_down_cpu
*/
ENTRY(tegra_sleep_cpu_finish)
mov r4, r0
/* Flush and disable the L1 data cache */
mov r0, #TEGRA_FLUSH_CACHE_ALL
bl tegra_disable_clean_inv_dcache
mov r0, r4
mov32 r6, tegra_tear_down_cpu
ldr r1, [r6]
add r1, r1, r0

6
arch/arm/mach-tegra/sleep.h
View File

@ -41,6 +41,10 @@
#define CPU_NOT_RESETTABLE 0
#endif
/* flag of tegra_disable_clean_inv_dcache to do LoUIS or all */
#define TEGRA_FLUSH_CACHE_LOUIS 0
#define TEGRA_FLUSH_CACHE_ALL 1
#ifdef __ASSEMBLY__
/* returns the offset of the flow controller halt register for a cpu */
.macro cpu_to_halt_reg rd, rcpu
@ -144,7 +148,7 @@ void tegra_pen_lock(void);
void tegra_pen_unlock(void);
void tegra_resume(void);
int tegra_sleep_cpu_finish(unsigned long);
void tegra_disable_clean_inv_dcache(void);
void tegra_disable_clean_inv_dcache(u32 flag);
#ifdef CONFIG_HOTPLUG_CPU
void tegra20_hotplug_shutdown(void);