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MIPS: kernel: cpu-probe.c: Add support for MIPS R6

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Add MIPS R6 support when decoding the config0 c0 register.
Also add MIPS R6 support when examining the ebase c0 register
to get the core number and when getting the shadow set number
from the srsctl c0 register.

Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
This commit is contained in:
Leonid Yegoshin 2014-11-13 13:51:51 +00:00 committed by Markos Chandras
parent 54dac95083
commit 8b8aa636f0
1 changed files with 16 additions and 4 deletions
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20
arch/mips/kernel/cpu-probe.c
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@ -237,6 +237,13 @@ static void set_isa(struct cpuinfo_mips *c, unsigned int isa)
c->isa_level |= MIPS_CPU_ISA_II | MIPS_CPU_ISA_III;
break;
/* R6 incompatible with everything else */
case MIPS_CPU_ISA_M64R6:
c->isa_level |= MIPS_CPU_ISA_M32R6 | MIPS_CPU_ISA_M64R6;
case MIPS_CPU_ISA_M32R6:
c->isa_level |= MIPS_CPU_ISA_M32R6;
/* Break here so we don't add incompatible ISAs */
break;
case MIPS_CPU_ISA_M32R2:
c->isa_level |= MIPS_CPU_ISA_M32R2;
case MIPS_CPU_ISA_M32R1:
@ -326,6 +333,9 @@ static inline unsigned int decode_config0(struct cpuinfo_mips *c)
case 1:
set_isa(c, MIPS_CPU_ISA_M32R2);
break;
case 2:
set_isa(c, MIPS_CPU_ISA_M32R6);
break;
default:
goto unknown;
}
@ -338,6 +348,9 @@ static inline unsigned int decode_config0(struct cpuinfo_mips *c)
case 1:
set_isa(c, MIPS_CPU_ISA_M64R2);
break;
case 2:
set_isa(c, MIPS_CPU_ISA_M64R6);
break;
default:
goto unknown;
}
@ -543,7 +556,7 @@ static void decode_configs(struct cpuinfo_mips *c)
}
#ifndef CONFIG_MIPS_CPS
if (cpu_has_mips_r2) {
if (cpu_has_mips_r2_r6) {
c->core = get_ebase_cpunum();
if (cpu_has_mipsmt)
c->core >>= fls(core_nvpes()) - 1;
@ -1352,8 +1365,7 @@ void cpu_probe(void)
if (c->options & MIPS_CPU_FPU) {
c->fpu_id = cpu_get_fpu_id();
if (c->isa_level & (MIPS_CPU_ISA_M32R1 | MIPS_CPU_ISA_M32R2 |
MIPS_CPU_ISA_M64R1 | MIPS_CPU_ISA_M64R2)) {
if (c->isa_level & cpu_has_mips_r) {
if (c->fpu_id & MIPS_FPIR_3D)
c->ases |= MIPS_ASE_MIPS3D;
if (c->fpu_id & MIPS_FPIR_FREP)
@ -1361,7 +1373,7 @@ void cpu_probe(void)
}
}
if (cpu_has_mips_r2) {
if (cpu_has_mips_r2_r6) {
c->srsets = ((read_c0_srsctl() >> 26) & 0x0f) + 1;
/* R2 has Performance Counter Interrupt indicator */
c->options |= MIPS_CPU_PCI;