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[ARM] 5516/1: Flush the D-cache after initialising the SCU 

On MP systems, the data loaded by CPU0 before the SCU was initialised
may not be visible to the other CPUs.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

This also includes the following compile fix:

This patch includes 'asm/cacheflush.h' which is needed to use
'flush_cache_all()' function.

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Catalin Marinas 2009-05-18 16:26:27 +01:00 committed by Russell King
parent 4c5158d4c3
commit af73110d23
1 changed files with 7 additions and 0 deletions
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7
arch/arm/kernel/smp_scu.c
View File

@ -12,6 +12,7 @@
#include <linux/io.h> #include <linux/io.h>
#include <asm/smp_scu.h> #include <asm/smp_scu.h>
#include <asm/cacheflush.h>
#define SCU_CTRL 0x00 #define SCU_CTRL 0x00
#define SCU_CONFIG 0x04 #define SCU_CONFIG 0x04
@ -38,4 +39,10 @@ void __init scu_enable(void __iomem *scu_base)
scu_ctrl = __raw_readl(scu_base + SCU_CTRL); scu_ctrl = __raw_readl(scu_base + SCU_CTRL);
scu_ctrl |= 1; scu_ctrl |= 1;
__raw_writel(scu_ctrl, scu_base + SCU_CTRL); __raw_writel(scu_ctrl, scu_base + SCU_CTRL);
/*
* Ensure that the data accessed by CPU0 before the SCU was
* initialised is visible to the other CPUs.
*/
flush_cache_all();
} }