[PATCH 7/7] ARM: pm: add L2 cache cleaning for suspend

Russell King - ARM Linux
2011-09-19T17:48:47Z

We need to ensure that state is pushed out from the L2 cache when
suspending so that the resume paths can access their data before the
MMU and caches have been re-initialized. Add the necessary calls to
__cpu_suspend_save().

Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
arch/arm/kernel/suspend.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/arch/arm/kernel/suspend.c b/arch/arm/kernel/suspend.c
index 2d60f19..93a22d2 100644
--- a/arch/arm/kernel/suspend.c
+++ b/arch/arm/kernel/suspend.c
@@ -28,6 +28,9 @@ void __cpu_suspend_save(u32 *ptr, u32 ptrsz, u32 sp, u32 *save_ptr)
cpu_do_suspend(ptr);

flush_cache_all();
+ outer_clean_range(*save_ptr, *save_ptr + ptrsz);
+ outer_clean_range(virt_to_phys(save_ptr),
+ virt_to_phys(save_ptr) + sizeof(*save_ptr));
}

/*
--
1.7.4.4