| #ifndef __ASM_ARM_CPUTYPE_H |
| #define __ASM_ARM_CPUTYPE_H |
| |
| #include <linux/stringify.h> |
| |
| #define CPUID_ID 0 |
| #define CPUID_CACHETYPE 1 |
| #define CPUID_TCM 2 |
| #define CPUID_TLBTYPE 3 |
| |
| #define CPUID_EXT_PFR0 "c1, 0" |
| #define CPUID_EXT_PFR1 "c1, 1" |
| #define CPUID_EXT_DFR0 "c1, 2" |
| #define CPUID_EXT_AFR0 "c1, 3" |
| #define CPUID_EXT_MMFR0 "c1, 4" |
| #define CPUID_EXT_MMFR1 "c1, 5" |
| #define CPUID_EXT_MMFR2 "c1, 6" |
| #define CPUID_EXT_MMFR3 "c1, 7" |
| #define CPUID_EXT_ISAR0 "c2, 0" |
| #define CPUID_EXT_ISAR1 "c2, 1" |
| #define CPUID_EXT_ISAR2 "c2, 2" |
| #define CPUID_EXT_ISAR3 "c2, 3" |
| #define CPUID_EXT_ISAR4 "c2, 4" |
| #define CPUID_EXT_ISAR5 "c2, 5" |
| |
| #ifdef CONFIG_CPU_CP15 |
| #define read_cpuid(reg) \ |
| ({ \ |
| unsigned int __val; \ |
| asm("mrc p15, 0, %0, c0, c0, " __stringify(reg) \ |
| : "=r" (__val) \ |
| : \ |
| : "cc"); \ |
| __val; \ |
| }) |
| #define read_cpuid_ext(ext_reg) \ |
| ({ \ |
| unsigned int __val; \ |
| asm("mrc p15, 0, %0, c0, " ext_reg \ |
| : "=r" (__val) \ |
| : \ |
| : "cc"); \ |
| __val; \ |
| }) |
| #else |
| extern unsigned int processor_id; |
| #define read_cpuid(reg) (processor_id) |
| #define read_cpuid_ext(reg) 0 |
| #endif |
| |
| /* |
| * The CPU ID never changes at run time, so we might as well tell the |
| * compiler that it's constant. Use this function to read the CPU ID |
| * rather than directly reading processor_id or read_cpuid() directly. |
| */ |
| static inline unsigned int __attribute_const__ read_cpuid_id(void) |
| { |
| return read_cpuid(CPUID_ID); |
| } |
| |
| static inline unsigned int __attribute_const__ read_cpuid_cachetype(void) |
| { |
| return read_cpuid(CPUID_CACHETYPE); |
| } |
| |
| static inline unsigned int __attribute_const__ read_cpuid_tcmstatus(void) |
| { |
| return read_cpuid(CPUID_TCM); |
| } |
| |
| /* |
| * Intel's XScale3 core supports some v6 features (supersections, L2) |
| * but advertises itself as v5 as it does not support the v6 ISA. For |
| * this reason, we need a way to explicitly test for this type of CPU. |
| */ |
| #ifndef CONFIG_CPU_XSC3 |
| #define cpu_is_xsc3() 0 |
| #else |
| static inline int cpu_is_xsc3(void) |
| { |
| unsigned int id; |
| id = read_cpuid_id() & 0xffffe000; |
| /* It covers both Intel ID and Marvell ID */ |
| if ((id == 0x69056000) || (id == 0x56056000)) |
| return 1; |
| |
| return 0; |
| } |
| #endif |
| |
| #if !defined(CONFIG_CPU_XSCALE) && !defined(CONFIG_CPU_XSC3) |
| #define cpu_is_xscale() 0 |
| #else |
| #define cpu_is_xscale() 1 |
| #endif |
| |
| #endif |