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MIPS: detect presence of MAARs

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Detect the presence of MAAR using the MRP bit in Config5, and record
that presence using a CPU option bit. A cpu_has_maar macro will then
allow code to conditionalise upon the presence of MAARs.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7330/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Paul Burton
2014-07-14 10:32:14 +01:00
committed by Ralf Baechle
parent e19d5dbad5
commit 1f6c52ff72
3 changed files with 6 additions and 0 deletions
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2
arch/mips/kernel/cpu-probe.c
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@@ -405,6 +405,8 @@ static inline unsigned int decode_config5(struct cpuinfo_mips *c)
if (config5 & MIPS_CONF5_EVA)
c->options |= MIPS_CPU_EVA;
if (config5 & MIPS_CONF5_MRP)
c->options |= MIPS_CPU_MAAR;
return config5 & MIPS_CONF_M;
}