forked from Minki/linux
MIPS: Don't probe reserved EntryHi bits.
The patch that adds cpu_probe_vmbits is erroneously writing to reserved bit 12. Since we are really only probing high bits, don't write this bit with a one. Signed-off-by: David Daney <ddaney@caviumnetworks.com> To: linux-mips@linux-mips.org Cc: Guenter Roeck <guenter.roeck@ericsson.com> Patchwork: http://patchwork.linux-mips.org/patch/949/ Acked-by: Guenter Roeck <guenter.roeck@ericsson.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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@ -287,9 +287,9 @@ static inline int __cpu_has_fpu(void)
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static inline void cpu_probe_vmbits(struct cpuinfo_mips *c)
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static inline void cpu_probe_vmbits(struct cpuinfo_mips *c)
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{
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{
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#ifdef __NEED_VMBITS_PROBE
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#ifdef __NEED_VMBITS_PROBE
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write_c0_entryhi(0x3ffffffffffff000ULL);
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write_c0_entryhi(0x3fffffffffffe000ULL);
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back_to_back_c0_hazard();
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back_to_back_c0_hazard();
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c->vmbits = fls64(read_c0_entryhi() & 0x3ffffffffffff000ULL);
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c->vmbits = fls64(read_c0_entryhi() & 0x3fffffffffffe000ULL);
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#endif
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#endif
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}
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}
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