| /* |
| * ARM specific SMP header, this contains our implementation |
| * details. |
| */ |
| #ifndef __ASMARM_SMP_PLAT_H |
| #define __ASMARM_SMP_PLAT_H |
| |
| #include <linux/cpumask.h> |
| #include <linux/err.h> |
| |
| #include <asm/cputype.h> |
| |
| /* |
| * Return true if we are running on a SMP platform |
| */ |
| static inline bool is_smp(void) |
| { |
| #ifndef CONFIG_SMP |
| return false; |
| #elif defined(CONFIG_SMP_ON_UP) |
| extern unsigned int smp_on_up; |
| return !!smp_on_up; |
| #else |
| return true; |
| #endif |
| } |
| |
| /* all SMP configurations have the extended CPUID registers */ |
| #ifndef CONFIG_MMU |
| #define tlb_ops_need_broadcast() 0 |
| #else |
| static inline int tlb_ops_need_broadcast(void) |
| { |
| if (!is_smp()) |
| return 0; |
| |
| return ((read_cpuid_ext(CPUID_EXT_MMFR3) >> 12) & 0xf) < 2; |
| } |
| #endif |
| |
| #if !defined(CONFIG_SMP) || __LINUX_ARM_ARCH__ >= 7 |
| #define cache_ops_need_broadcast() 0 |
| #else |
| static inline int cache_ops_need_broadcast(void) |
| { |
| if (!is_smp()) |
| return 0; |
| |
| return ((read_cpuid_ext(CPUID_EXT_MMFR3) >> 12) & 0xf) < 1; |
| } |
| #endif |
| |
| /* |
| * Logical CPU mapping. |
| */ |
| extern int __cpu_logical_map[]; |
| #define cpu_logical_map(cpu) __cpu_logical_map[cpu] |
| /* |
| * Retrieve logical cpu index corresponding to a given MPIDR[23:0] |
| * - mpidr: MPIDR[23:0] to be used for the look-up |
| * |
| * Returns the cpu logical index or -EINVAL on look-up error |
| */ |
| static inline int get_logical_index(u32 mpidr) |
| { |
| int cpu; |
| for (cpu = 0; cpu < nr_cpu_ids; cpu++) |
| if (cpu_logical_map(cpu) == mpidr) |
| return cpu; |
| return -EINVAL; |
| } |
| |
| struct mpidr_hash { |
| u32 mask; |
| u32 shift_aff[3]; |
| u32 bits; |
| }; |
| |
| extern struct mpidr_hash mpidr_hash; |
| |
| static inline u32 mpidr_hash_size(void) |
| { |
| return 1 << mpidr_hash.bits; |
| } |
| #endif |