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ARM: pm: add L2 cache cleaning for suspend

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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>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
Tested-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2011-09-01 11:57:59 +01:00
parent abda1bd5f4
commit 8e6f83bbdf
1 changed files with 3 additions and 0 deletions
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3
arch/arm/kernel/suspend.c
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@ -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));
}
/*