diff options
Diffstat (limited to 'arch/arm/include/asm/smp_scu.h')
-rw-r--r-- | arch/arm/include/asm/smp_scu.h | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/arch/arm/include/asm/smp_scu.h b/arch/arm/include/asm/smp_scu.h new file mode 100644 index 0000000000..b818e5d0cd --- /dev/null +++ b/arch/arm/include/asm/smp_scu.h @@ -0,0 +1,62 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ASMARM_ARCH_SCU_H +#define __ASMARM_ARCH_SCU_H + +#define SCU_PM_NORMAL 0 +#define SCU_PM_DORMANT 2 +#define SCU_PM_POWEROFF 3 + +#ifndef __ASSEMBLER__ + +#include <linux/errno.h> +#include <asm/cputype.h> + +static inline bool scu_a9_has_base(void) +{ + return read_cpuid_part() == 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; +} + +#ifdef CONFIG_HAVE_ARM_SCU +unsigned int scu_get_core_count(void __iomem *); +int scu_power_mode(void __iomem *, unsigned int); +int scu_cpu_power_enable(void __iomem *, unsigned int); +int scu_get_cpu_power_mode(void __iomem *scu_base, unsigned int logical_cpu); +#else +static inline unsigned int scu_get_core_count(void __iomem *scu_base) +{ + return 0; +} +static inline int scu_power_mode(void __iomem *scu_base, unsigned int mode) +{ + return -EINVAL; +} +static inline int scu_cpu_power_enable(void __iomem *scu_base, + unsigned int mode) +{ + return -EINVAL; +} +static inline int scu_get_cpu_power_mode(void __iomem *scu_base, + unsigned int logical_cpu) +{ + return -EINVAL; +} +#endif + +#if defined(CONFIG_SMP) && defined(CONFIG_HAVE_ARM_SCU) +void scu_enable(void __iomem *scu_base); +#else +static inline void scu_enable(void __iomem *scu_base) {} +#endif + +#endif + +#endif |