[PATCH V2 0/6] MIPS: Loongson: Add Loongson-3A R2 support

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This patchset is is prepared for the next 4.6 release for Linux/MIPS.
It adds Loongson-3A R2 (Loongson-3A2000) support and fixes a potential
bug related to FTLB.

Loongson-3 CPU family:

Code-name       Brand-name       PRId
Loongson-3A R1  Loongson-3A1000  0x6305
Loongson-3A R2  Loongson-3A2000  0x6308
Loongson-3B R1  Loongson-3B1000  0x6306
Loongson-3B R2  Loongson-3B1500  0x6307

Features of R2 revision of Loongson-3A:
1, Primary cache includes I-Cache, D-Cache and V-Cache (Victim Cache).
2, I-Cache, D-Cache and V-Cache are 16-way set-associative, linesize is 64 Bytes.
3, 64 entries of VTLB (classic TLB), 1024 entries of FTLB (8-way set-associative).
4, Support DSP/DSPv2 instructions, UserLocal register and Read-Inhibit/Execute-Inhibit.

V1 -> V2:
1, Probe MIPS_CPU_PREFETCH by PRId.
2, Use PRID_REV_MASK instead of hardcode.
3, Update commit messages to avoid confusion.

Huacai Chen(6):
 MIPS: Loongson: Add Loongson-3A R2 basic support.
 MIPS: Loongson: Invalidate special TLBs when needed.
 MIPS: Loongson-3: Fast TLB refill handler.
 MIPS: tlbex: Fix bugs in tlbchange handler.
 MIPS: Loongson: Introduce and use cpu_has_coherent_cache feature.
 MIPS: Loongson-3: Introduce CONFIG_LOONGSON3_ENHANCEMENT.

Signed-off-by: Huacai Chen <chenhc@xxxxxxxxxx>
---
 arch/mips/Kconfig                                  |  19 +++
 arch/mips/include/asm/cacheops.h                   |   6 +
 arch/mips/include/asm/cpu-features.h               |   6 +
 arch/mips/include/asm/cpu-info.h                   |   1 +
 arch/mips/include/asm/cpu.h                        |   6 +-
 arch/mips/include/asm/hazards.h                    |   7 +-
 arch/mips/include/asm/io.h                         |  10 +-
 arch/mips/include/asm/irqflags.h                   |   5 +
 .../asm/mach-loongson64/cpu-feature-overrides.h    |  13 +-
 .../asm/mach-loongson64/kernel-entry-init.h        |  18 ++-
 arch/mips/include/asm/mipsregs.h                   |   8 ++
 arch/mips/include/asm/pgtable-bits.h               |   8 +-
 arch/mips/include/asm/pgtable.h                    |   4 +-
 arch/mips/include/asm/uasm.h                       |   3 +-
 arch/mips/include/uapi/asm/inst.h                  |  10 ++
 arch/mips/kernel/cpu-probe.c                       |  40 +++++-
 arch/mips/kernel/idle.c                            |   5 +
 arch/mips/kernel/traps.c                           |   3 +-
 arch/mips/loongson64/common/env.c                  |   7 +-
 arch/mips/loongson64/loongson-3/smp.c              | 106 ++++++++++++--
 arch/mips/mm/c-r4k.c                               |  51 +++++++
 arch/mips/mm/page.c                                |   9 ++
 arch/mips/mm/tlb-r4k.c                             |  27 ++--
 arch/mips/mm/tlbex.c                               | 157 ++++++++++++++++++++-
 arch/mips/mm/uasm-mips.c                           |   2 +
 arch/mips/mm/uasm.c                                |   3 +
 drivers/platform/mips/cpu_hwmon.c                  |   4 +-
 27 files changed, 478 insertions(+), 60 deletions(-)
--
2.4.6






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