diff options
Diffstat (limited to 'arch/mips/kernel/cpu-probe.c')
| -rw-r--r-- | arch/mips/kernel/cpu-probe.c | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c index 5d71eca41575..8e6427a50916 100644 --- a/arch/mips/kernel/cpu-probe.c +++ b/arch/mips/kernel/cpu-probe.c @@ -191,7 +191,7 @@ static inline int __cpu_has_fpu(void) return ((cpu_get_fpu_id() & 0xff00) != FPIR_IMP_NONE); } -#define R4K_OPTS (MIPS_CPU_TLB | MIPS_CPU_4KEX | MIPS_CPU_4KTLB \ +#define R4K_OPTS (MIPS_CPU_TLB | MIPS_CPU_4KEX | MIPS_CPU_4K_CACHE \ | MIPS_CPU_COUNTER) static inline void cpu_probe_legacy(struct cpuinfo_mips *c) @@ -200,7 +200,8 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c) case PRID_IMP_R2000: c->cputype = CPU_R2000; c->isa_level = MIPS_CPU_ISA_I; - c->options = MIPS_CPU_TLB | MIPS_CPU_NOFPUEX; + c->options = MIPS_CPU_TLB | MIPS_CPU_3K_CACHE | + MIPS_CPU_NOFPUEX; if (__cpu_has_fpu()) c->options |= MIPS_CPU_FPU; c->tlbsize = 64; @@ -214,7 +215,8 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c) else c->cputype = CPU_R3000; c->isa_level = MIPS_CPU_ISA_I; - c->options = MIPS_CPU_TLB | MIPS_CPU_NOFPUEX; + c->options = MIPS_CPU_TLB | MIPS_CPU_3K_CACHE | + MIPS_CPU_NOFPUEX; if (__cpu_has_fpu()) c->options |= MIPS_CPU_FPU; c->tlbsize = 64; @@ -297,7 +299,7 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c) #endif case PRID_IMP_TX39: c->isa_level = MIPS_CPU_ISA_I; - c->options = MIPS_CPU_TLB; + c->options = MIPS_CPU_TLB | MIPS_CPU_TX39_CACHE; if ((c->processor_id & 0xf0) == (PRID_REV_TX3927 & 0xf0)) { c->cputype = CPU_TX3927; @@ -441,7 +443,7 @@ static inline unsigned int decode_config0(struct cpuinfo_mips *c) config0 = read_c0_config(); if (((config0 & MIPS_CONF_MT) >> 7) == 1) - c->options |= MIPS_CPU_TLB | MIPS_CPU_4KTLB; + c->options |= MIPS_CPU_TLB; isa = (config0 & MIPS_CONF_AT) >> 13; switch (isa) { case 0: @@ -516,8 +518,8 @@ static inline unsigned int decode_config3(struct cpuinfo_mips *c) static inline void decode_configs(struct cpuinfo_mips *c) { /* MIPS32 or MIPS64 compliant CPU. */ - c->options = MIPS_CPU_4KEX | MIPS_CPU_COUNTER | MIPS_CPU_DIVEC | - MIPS_CPU_LLSC | MIPS_CPU_MCHECK; + c->options = MIPS_CPU_4KEX | MIPS_CPU_4K_CACHE | MIPS_CPU_COUNTER | + MIPS_CPU_DIVEC | MIPS_CPU_LLSC | MIPS_CPU_MCHECK; c->scache.flags = MIPS_CACHE_NOT_PRESENT; @@ -603,6 +605,15 @@ static inline void cpu_probe_alchemy(struct cpuinfo_mips *c) static inline void cpu_probe_sibyte(struct cpuinfo_mips *c) { decode_configs(c); + + /* + * For historical reasons the SB1 comes with it's own variant of + * cache code which eventually will be folded into c-r4k.c. Until + * then we pretend it's got it's own cache architecture. + */ + c->options &= MIPS_CPU_4K_CACHE; + c->options |= MIPS_CPU_SB1_CACHE; + switch (c->processor_id & 0xff00) { case PRID_IMP_SB1: c->cputype = CPU_SB1; |