diff options
| author | Huacai Chen <chenhc@lemote.com> | 2016-03-03 01:45:12 (GMT) |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2016-05-13 12:02:15 (GMT) |
| commit | 380cd582c08831217ae693c86411902e6300ba6b (patch) | |
| tree | b7782319903d4af1ceae2e76edd8812b8392ef42 /arch/mips/include | |
| parent | 06e4814eec988f7ee01c29762f945b3ff59355fb (diff) | |
| download | linux-380cd582c08831217ae693c86411902e6300ba6b.tar.xz | |
MIPS: Loongson-3: Fast TLB refill handler
Loongson-3A R2 has pwbase/pwfield/pwsize/pwctl registers in CP0 (this
is very similar to HTW) and lwdir/lwpte/lddir/ldpte instructions which
can be used for fast TLB refill.
[ralf@linux-mips.org: Resolve conflict.]
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: Steven J . Hill <sjhill@realitydiluted.com>
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12754/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include')
| -rw-r--r-- | arch/mips/include/asm/cpu-features.h | 3 | ||||
| -rw-r--r-- | arch/mips/include/asm/cpu.h | 1 | ||||
| -rw-r--r-- | arch/mips/include/asm/mipsregs.h | 6 | ||||
| -rw-r--r-- | arch/mips/include/asm/uasm.h | 3 | ||||
| -rw-r--r-- | arch/mips/include/uapi/asm/inst.h | 10 |
5 files changed, 22 insertions, 1 deletions
diff --git a/arch/mips/include/asm/cpu-features.h b/arch/mips/include/asm/cpu-features.h index 6ff0504..da92d51 100644 --- a/arch/mips/include/asm/cpu-features.h +++ b/arch/mips/include/asm/cpu-features.h @@ -35,6 +35,9 @@ #ifndef cpu_has_htw #define cpu_has_htw (cpu_data[0].options & MIPS_CPU_HTW) #endif +#ifndef cpu_has_ldpte +#define cpu_has_ldpte (cpu_data[0].options & MIPS_CPU_LDPTE) +#endif #ifndef cpu_has_rixiex #define cpu_has_rixiex (cpu_data[0].options & MIPS_CPU_RIXIEX) #endif diff --git a/arch/mips/include/asm/cpu.h b/arch/mips/include/asm/cpu.h index 810536b..d9150a2 100644 --- a/arch/mips/include/asm/cpu.h +++ b/arch/mips/include/asm/cpu.h @@ -402,6 +402,7 @@ enum cpu_type_enum { #define MIPS_CPU_NAN_LEGACY MBIT_ULL(38) /* Legacy NaN implemented */ #define MIPS_CPU_NAN_2008 MBIT_ULL(39) /* 2008 NaN implemented */ #define MIPS_CPU_VP MBIT_ULL(40) /* MIPSr6 Virtual Processors (multi-threading) */ +#define MIPS_CPU_LDPTE MBIT_ULL(41) /* CPU has ldpte/lddir instructions */ /* * CPU ASE encodings diff --git a/arch/mips/include/asm/mipsregs.h b/arch/mips/include/asm/mipsregs.h index 0d0bd16..1e9d337 100644 --- a/arch/mips/include/asm/mipsregs.h +++ b/arch/mips/include/asm/mipsregs.h @@ -1474,6 +1474,12 @@ do { \ #define read_c0_pwctl() __read_32bit_c0_register($6, 6) #define write_c0_pwctl(val) __write_32bit_c0_register($6, 6, val) +#define read_c0_pgd() __read_64bit_c0_register($9, 7) +#define write_c0_pgd(val) __write_64bit_c0_register($9, 7, val) + +#define read_c0_kpgd() __read_64bit_c0_register($31, 7) +#define write_c0_kpgd(val) __write_64bit_c0_register($31, 7, val) + /* Cavium OCTEON (cnMIPS) */ #define read_c0_cvmcount() __read_ulong_c0_register($9, 6) #define write_c0_cvmcount(val) __write_ulong_c0_register($9, 6, val) diff --git a/arch/mips/include/asm/uasm.h b/arch/mips/include/asm/uasm.h index fc1cdd2..b6ecfee 100644 --- a/arch/mips/include/asm/uasm.h +++ b/arch/mips/include/asm/uasm.h @@ -171,7 +171,8 @@ Ip_u2u1(_wsbh); Ip_u3u1u2(_xor); Ip_u2u1u3(_xori); Ip_u2u1(_yield); - +Ip_u1u2(_ldpte); +Ip_u2u1u3(_lddir); /* Handle labels. */ struct uasm_label { diff --git a/arch/mips/include/uapi/asm/inst.h b/arch/mips/include/uapi/asm/inst.h index ddea53e..3bb8cd9 100644 --- a/arch/mips/include/uapi/asm/inst.h +++ b/arch/mips/include/uapi/asm/inst.h @@ -204,6 +204,16 @@ enum mad_func { }; /* + * func field for page table walker (Loongson-3). + */ +enum ptw_func { + lwdir_op = 0x00, + lwpte_op = 0x01, + lddir_op = 0x02, + ldpte_op = 0x03, +}; + +/* * func field for special3 lx opcodes (Cavium Octeon). */ enum lx_func { |