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authorRussell King <rmk+kernel@arm.linux.org.uk>2013-04-18 18:15:44 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2013-04-18 20:08:04 +0100
commitbca7a5a04933700a8bde4ea5798119607a8b0436 (patch)
tree9d1c2663fa2cd60d434d1603d192bbba3ae3d706 /arch/arm
parent51acdfd1fa38a2bf1003255be9f105c19fbc0176 (diff)
downloadlinux-stericsson-bca7a5a04933700a8bde4ea5798119607a8b0436.tar.gz
ARM: cpu hotplug: remove majority of cache flushing from platforms
Remove the majority of cache flushing calls from the individual platform files. This is now handled by the core code. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mach-exynos/hotplug.c1
-rw-r--r--arch/arm/mach-highbank/hotplug.c4
-rw-r--r--arch/arm/mach-imx/hotplug.c2
-rw-r--r--arch/arm/mach-msm/hotplug.c4
-rw-r--r--arch/arm/mach-omap2/omap-hotplug.c3
-rw-r--r--arch/arm/mach-prima2/hotplug.c3
-rw-r--r--arch/arm/mach-realview/hotplug.c2
-rw-r--r--arch/arm/mach-shmobile/smp-sh73a0.c8
-rw-r--r--arch/arm/mach-spear13xx/hotplug.c2
-rw-r--r--arch/arm/mach-tegra/hotplug.c1
-rw-r--r--arch/arm/mach-ux500/hotplug.c3
-rw-r--r--arch/arm/mach-vexpress/hotplug.c2
12 files changed, 0 insertions, 35 deletions
diff --git a/arch/arm/mach-exynos/hotplug.c b/arch/arm/mach-exynos/hotplug.c
index c3f825b27947..af90cfa2f826 100644
--- a/arch/arm/mach-exynos/hotplug.c
+++ b/arch/arm/mach-exynos/hotplug.c
@@ -28,7 +28,6 @@ static inline void cpu_enter_lowpower_a9(void)
{
unsigned int v;
- flush_cache_all();
asm volatile(
" mcr p15, 0, %1, c7, c5, 0\n"
" mcr p15, 0, %1, c7, c10, 4\n"
diff --git a/arch/arm/mach-highbank/hotplug.c b/arch/arm/mach-highbank/hotplug.c
index f30c52843396..35dd42e21685 100644
--- a/arch/arm/mach-highbank/hotplug.c
+++ b/arch/arm/mach-highbank/hotplug.c
@@ -15,8 +15,6 @@
*/
#include <linux/kernel.h>
-#include <asm/cacheflush.h>
-
#include "core.h"
#include "sysregs.h"
@@ -28,8 +26,6 @@ extern void secondary_startup(void);
*/
void __ref highbank_cpu_die(unsigned int cpu)
{
- flush_cache_all();
-
highbank_set_cpu_jump(cpu, phys_to_virt(0));
highbank_set_core_pwr();
diff --git a/arch/arm/mach-imx/hotplug.c b/arch/arm/mach-imx/hotplug.c
index 361a253e2b63..5e91112dcbee 100644
--- a/arch/arm/mach-imx/hotplug.c
+++ b/arch/arm/mach-imx/hotplug.c
@@ -11,7 +11,6 @@
*/
#include <linux/errno.h>
-#include <asm/cacheflush.h>
#include <asm/cp15.h>
#include "common.h"
@@ -20,7 +19,6 @@ static inline void cpu_enter_lowpower(void)
{
unsigned int v;
- flush_cache_all();
asm volatile(
"mcr p15, 0, %1, c7, c5, 0\n"
" mcr p15, 0, %1, c7, c10, 4\n"
diff --git a/arch/arm/mach-msm/hotplug.c b/arch/arm/mach-msm/hotplug.c
index 750446feb444..326a87261f9a 100644
--- a/arch/arm/mach-msm/hotplug.c
+++ b/arch/arm/mach-msm/hotplug.c
@@ -10,16 +10,12 @@
#include <linux/errno.h>
#include <linux/smp.h>
-#include <asm/cacheflush.h>
#include <asm/smp_plat.h>
#include "common.h"
static inline void cpu_enter_lowpower(void)
{
- /* Just flush the cache. Changing the coherency is not yet
- * available on msm. */
- flush_cache_all();
}
static inline void cpu_leave_lowpower(void)
diff --git a/arch/arm/mach-omap2/omap-hotplug.c b/arch/arm/mach-omap2/omap-hotplug.c
index e712d1725a8b..ceb30a59bf28 100644
--- a/arch/arm/mach-omap2/omap-hotplug.c
+++ b/arch/arm/mach-omap2/omap-hotplug.c
@@ -35,9 +35,6 @@ void __ref omap4_cpu_die(unsigned int cpu)
unsigned int boot_cpu = 0;
void __iomem *base = omap_get_wakeupgen_base();
- flush_cache_all();
- dsb();
-
/*
* we're ready for shutdown now, so do it
*/
diff --git a/arch/arm/mach-prima2/hotplug.c b/arch/arm/mach-prima2/hotplug.c
index f4b17cbababd..0ab2f8bae28e 100644
--- a/arch/arm/mach-prima2/hotplug.c
+++ b/arch/arm/mach-prima2/hotplug.c
@@ -10,13 +10,10 @@
#include <linux/errno.h>
#include <linux/smp.h>
-#include <asm/cacheflush.h>
#include <asm/smp_plat.h>
static inline void platform_do_lowpower(unsigned int cpu)
{
- flush_cache_all();
-
/* we put the platform to just WFI */
for (;;) {
__asm__ __volatile__("dsb\n\t" "wfi\n\t"
diff --git a/arch/arm/mach-realview/hotplug.c b/arch/arm/mach-realview/hotplug.c
index 53818e5cd3ad..ac22dd41b135 100644
--- a/arch/arm/mach-realview/hotplug.c
+++ b/arch/arm/mach-realview/hotplug.c
@@ -12,7 +12,6 @@
#include <linux/errno.h>
#include <linux/smp.h>
-#include <asm/cacheflush.h>
#include <asm/cp15.h>
#include <asm/smp_plat.h>
@@ -20,7 +19,6 @@ static inline void cpu_enter_lowpower(void)
{
unsigned int v;
- flush_cache_all();
asm volatile(
" mcr p15, 0, %1, c7, c5, 0\n"
" mcr p15, 0, %1, c7, c10, 4\n"
diff --git a/arch/arm/mach-shmobile/smp-sh73a0.c b/arch/arm/mach-shmobile/smp-sh73a0.c
index acb46a94ccdf..2f1ef1bc805d 100644
--- a/arch/arm/mach-shmobile/smp-sh73a0.c
+++ b/arch/arm/mach-shmobile/smp-sh73a0.c
@@ -119,14 +119,6 @@ static int sh73a0_cpu_kill(unsigned int cpu)
static void sh73a0_cpu_die(unsigned int cpu)
{
- /*
- * The ARM MPcore does not issue a cache coherency request for the L1
- * cache when powering off single CPUs. We must take care of this and
- * further caches.
- */
- dsb();
- flush_cache_all();
-
/* Set power off mode. This takes the CPU out of the MP cluster */
scu_power_mode(scu_base_addr(), SCU_PM_POWEROFF);
diff --git a/arch/arm/mach-spear13xx/hotplug.c b/arch/arm/mach-spear13xx/hotplug.c
index a7d2dd11a4f2..d97749c642ce 100644
--- a/arch/arm/mach-spear13xx/hotplug.c
+++ b/arch/arm/mach-spear13xx/hotplug.c
@@ -13,7 +13,6 @@
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/smp.h>
-#include <asm/cacheflush.h>
#include <asm/cp15.h>
#include <asm/smp_plat.h>
@@ -21,7 +20,6 @@ static inline void cpu_enter_lowpower(void)
{
unsigned int v;
- flush_cache_all();
asm volatile(
" mcr p15, 0, %1, c7, c5, 0\n"
" dsb\n"
diff --git a/arch/arm/mach-tegra/hotplug.c b/arch/arm/mach-tegra/hotplug.c
index 1fb9915f7895..e8323bc95770 100644
--- a/arch/arm/mach-tegra/hotplug.c
+++ b/arch/arm/mach-tegra/hotplug.c
@@ -12,7 +12,6 @@
#include <linux/smp.h>
#include <linux/clk/tegra.h>
-#include <asm/cacheflush.h>
#include <asm/smp_plat.h>
#include "sleep.h"
diff --git a/arch/arm/mach-ux500/hotplug.c b/arch/arm/mach-ux500/hotplug.c
index 2f6af259015d..1c55a55dd89e 100644
--- a/arch/arm/mach-ux500/hotplug.c
+++ b/arch/arm/mach-ux500/hotplug.c
@@ -12,7 +12,6 @@
#include <linux/errno.h>
#include <linux/smp.h>
-#include <asm/cacheflush.h>
#include <asm/smp_plat.h>
#include <mach/setup.h>
@@ -24,8 +23,6 @@
*/
void __ref ux500_cpu_die(unsigned int cpu)
{
- flush_cache_all();
-
/* directly enter low power state, skipping secure registers */
for (;;) {
__asm__ __volatile__("dsb\n\t" "wfi\n\t"
diff --git a/arch/arm/mach-vexpress/hotplug.c b/arch/arm/mach-vexpress/hotplug.c
index a141b98d84fe..f0ce6b8f5e71 100644
--- a/arch/arm/mach-vexpress/hotplug.c
+++ b/arch/arm/mach-vexpress/hotplug.c
@@ -12,7 +12,6 @@
#include <linux/errno.h>
#include <linux/smp.h>
-#include <asm/cacheflush.h>
#include <asm/smp_plat.h>
#include <asm/cp15.h>
@@ -20,7 +19,6 @@ static inline void cpu_enter_lowpower(void)
{
unsigned int v;
- flush_cache_all();
asm volatile(
"mcr p15, 0, %1, c7, c5, 0\n"
" mcr p15, 0, %1, c7, c10, 4\n"