Cleanup the mess in cpu_cache_init.

    
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

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;