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ARM: Add API to detect SCU base address from CP15 

Add API to detect SCU base address from CP15.

Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Hiroshi Doyu 2013-01-22 07:52:01 +02:00 committed by Stephen Warren
parent a8a6930157
commit e9d6b3358a
1 changed files with 17 additions and 0 deletions
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17
arch/arm/include/asm/smp_scu.h
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@ -6,6 +6,23 @@
#define SCU_PM_POWEROFF 3
#ifndef __ASSEMBLER__
#include <asm/cputype.h>
static inline bool scu_a9_has_base(void)
{
return read_cpuid_part_number() == ARM_CPU_PART_CORTEX_A9;
}
static inline unsigned long scu_a9_get_base(void)
{
unsigned long pa;
asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (pa));
return pa;
}
unsigned int scu_get_core_count(void __iomem *);
void scu_enable(void __iomem *);
int scu_power_mode(void __iomem *, unsigned int);