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Diffstat (limited to 'arch/mips/kernel/cpu-probe.c')
-rw-r--r--arch/mips/kernel/cpu-probe.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index 80e202eca05..9c187a64649 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -284,6 +284,15 @@ static inline int __cpu_has_fpu(void)
return ((cpu_get_fpu_id() & 0xff00) != FPIR_IMP_NONE);
}
+static inline void cpu_probe_vmbits(struct cpuinfo_mips *c)
+{
+#ifdef __NEED_VMBITS_PROBE
+ write_c0_entryhi(0x3ffffffffffff000ULL);
+ back_to_back_c0_hazard();
+ c->vmbits = fls64(read_c0_entryhi() & 0x3ffffffffffff000ULL);
+#endif
+}
+
#define R4K_OPTS (MIPS_CPU_TLB | MIPS_CPU_4KEX | MIPS_CPU_4K_CACHE \
| MIPS_CPU_COUNTER)
@@ -969,6 +978,8 @@ __cpuinit void cpu_probe(void)
c->srsets = ((read_c0_srsctl() >> 26) & 0x0f) + 1;
else
c->srsets = 1;
+
+ cpu_probe_vmbits(c);
}
__cpuinit void cpu_report(void)