Add API to detect SCU base address from CP15. Signed-off-by: Hiroshi Doyu <hdoyu@xxxxxxxxxx> --- NOTE: This wasn't delivered to linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, resending.... For usage: http://patchwork.ozlabs.org/patch/212013/ --- arch/arm/include/asm/smp_scu.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/arch/arm/include/asm/smp_scu.h b/arch/arm/include/asm/smp_scu.h index 4eb6d00..f619eef 100644 --- a/arch/arm/include/asm/smp_scu.h +++ b/arch/arm/include/asm/smp_scu.h @@ -6,6 +6,23 @@ #define SCU_PM_POWEROFF 3 #ifndef __ASSEMBLER__ + +#include <asm/cputype.h> + +static inline phys_addr_t scu_get_base(void) +{ + phys_addr_t pa; + unsigned long part_number = read_cpuid_part_number(); + + switch (part_number) { + case ARM_CPU_PART_CORTEX_A9: + /* Get SCU physical base */ + asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (pa)); + return pa; + default: + return 0; + } +} unsigned int scu_get_core_count(void __iomem *); void scu_enable(void __iomem *); int scu_power_mode(void __iomem *, unsigned int); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
