From: wzch <wzch@marvell.com>
To: Russell King <linux@arm.linux.org.uk>,
Dave Martin <dave.martin@linaro.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Cc: Wenzeng Chen <wzch@marvell.com>
Subject: [PATCH] ARM: suspend: use flush range instead of flush all
Date: Wed, 12 Sep 2012 15:18:48 +0800 [thread overview]
Message-ID: <1347434328-7207-1-git-send-email-wzch@marvell.com> (raw)
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
next reply other threads:[~2012-09-12 7:23 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-12 7:18 wzch [this message]
2012-09-12 7:43 ` [PATCH] ARM: suspend: use flush range instead of flush all Shilimkar, Santosh
2012-09-12 8:54 ` Russell King - ARM Linux
2012-09-12 9:10 ` Shilimkar, Santosh
2012-09-12 9:46 ` Russell King - ARM Linux
2012-09-12 9:57 ` Shilimkar, Santosh
2012-09-13 2:20 ` Raul Xiong
2012-09-13 8:52 ` Russell King - ARM Linux
2012-09-12 8:58 ` Lorenzo Pieralisi
2012-09-12 9:20 ` Shilimkar, Santosh
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