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MIPS: Introduce machinery for testing for MIPSxxR1/2.

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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle
2005-12-08 14:04:24 +00:00
committed by
parent e7958bb90d
commit b4672d3729
11 changed files with 95 additions and 9 deletions
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35
arch/mips/kernel/cpu-probe.c
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@@ -435,6 +435,9 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c)
}
}
static char unknown_isa[] __initdata = KERN_ERR \
"Unsupported ISA type, c0.config0: %d.";
static inline unsigned int decode_config0(struct cpuinfo_mips *c)
{
unsigned int config0;
@@ -447,16 +450,37 @@ static inline unsigned int decode_config0(struct cpuinfo_mips *c)
isa = (config0 & MIPS_CONF_AT) >> 13;
switch (isa) {
case 0:
c->isa_level = MIPS_CPU_ISA_M32R1;
switch ((config0 >> 10) & 7) {
case 0:
c->isa_level = MIPS_CPU_ISA_M32R1;
break;
case 1:
c->isa_level = MIPS_CPU_ISA_M32R2;
break;
default:
goto unknown;
}
break;
case 2:
c->isa_level = MIPS_CPU_ISA_M64R1;
switch ((config0 >> 10) & 7) {
case 0:
c->isa_level = MIPS_CPU_ISA_M64R1;
break;
case 1:
c->isa_level = MIPS_CPU_ISA_M64R2;
break;
default:
goto unknown;
}
break;
default:
panic("Unsupported ISA type, cp0.config0.at: %d.", isa);
goto unknown;
}
return config0 & MIPS_CONF_M;
unknown:
panic(unknown_isa, config0);
}
static inline unsigned int decode_config1(struct cpuinfo_mips *c)
@@ -568,7 +592,6 @@ static inline void cpu_probe_mips(struct cpuinfo_mips *c)
break;
case PRID_IMP_34K:
c->cputype = CPU_34K;
c->isa_level = MIPS_CPU_ISA_M32R1;
break;
}
}
@@ -691,7 +714,9 @@ __init void cpu_probe(void)
c->fpu_id = cpu_get_fpu_id();
if (c->isa_level == MIPS_CPU_ISA_M32R1 ||
c->isa_level == MIPS_CPU_ISA_M64R1) {
c->isa_level == MIPS_CPU_ISA_M32R2 ||
c->isa_level == MIPS_CPU_ISA_M64R1 ||
c->isa_level == MIPS_CPU_ISA_M64R2) {
if (c->fpu_id & MIPS_FPIR_3D)
c->ases |= MIPS_ASE_MIPS3D;
}