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MIPS: cpu-features: Add cpu_has_ftlb

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Add cpu_has_ftlb, which specifies that an FTLB is present in addition to
the VTLB, probed based on whether Config.MT == 4 (rather than 1 for
standard JTLB).

This is necessary since MIPS release 6 removes Config4.MMUExtDef, so the
presence of the FTLB fields in Config4 must be determined from Config.MT
instead.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/11159/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
James Hogan
2015-09-17 17:49:20 +01:00
committed by Ralf Baechle
parent 19446da415
commit 2f6f31363c
4 changed files with 11 additions and 3 deletions
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1
arch/mips/include/asm/cpu.h
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@ -385,6 +385,7 @@ enum cpu_type_enum {
#define MIPS_CPU_CDMM 0x4000000000ull /* CPU has Common Device Memory Map */
#define MIPS_CPU_BP_GHIST 0x8000000000ull /* R12K+ Branch Prediction Global History */
#define MIPS_CPU_SP 0x10000000000ull /* Small (1KB) page support */
#define MIPS_CPU_FTLB 0x20000000000ull /* CPU has Fixed-page-size TLB */
/*
* CPU ASE encodings