Messages in this thread Patch in this message | | | From | wzch <> | Subject | [PATCH] ARM: suspend: use flush range instead of flush all | Date | Wed, 12 Sep 2012 15:18:48 +0800 |
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From: Wenzeng Chen <wzch@marvell.com>
In cpu suspend function __cpu_suspend_save(), we save cp15 registers, resume function, sp and suspend_pgd, then flush the data to DDR, but no need to flush all D cache, only need to flush range.
Change-Id: I591a1fde929f3f987c69306b601843ed975d3e41 Signed-off-by: Wenzeng Chen <wzch@marvell.com> --- arch/arm/kernel/suspend.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/arch/arm/kernel/suspend.c b/arch/arm/kernel/suspend.c index 1794cc3..bb582d8 100644 --- a/arch/arm/kernel/suspend.c +++ b/arch/arm/kernel/suspend.c @@ -17,6 +17,7 @@ extern void cpu_resume_mmu(void); */ void __cpu_suspend_save(u32 *ptr, u32 ptrsz, u32 sp, u32 *save_ptr) { + u32 *ptr_orig = ptr; *save_ptr = virt_to_phys(ptr); /* This must correspond to the LDM in cpu_resume() assembly */ @@ -26,7 +27,8 @@ void __cpu_suspend_save(u32 *ptr, u32 ptrsz, u32 sp, u32 *save_ptr) cpu_do_suspend(ptr); - flush_cache_all(); + __cpuc_flush_dcache_area((void *)ptr_orig, ptrsz); + __cpuc_flush_dcache_area((void *)save_ptr, sizeof(*save_ptr)); outer_clean_range(*save_ptr, *save_ptr + ptrsz); outer_clean_range(virt_to_phys(save_ptr), virt_to_phys(save_ptr) + sizeof(*save_ptr)); -- 1.7.1
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