diff options
| author | Jiaxun Yang <jiaxun.yang@flygoat.com> | 2020-01-13 18:16:11 +0800 |
|---|---|---|
| committer | Paul Burton <paulburton@kernel.org> | 2020-01-22 15:56:08 -0800 |
| commit | ece276de2a1f90b6a7836d388c372b9025345469 (patch) | |
| tree | 7a1a50ccc9502f153efd87015a51a2c8fdb9b961 /arch/mips/include/asm/cpu.h | |
| parent | 0a3d5b577784e93ae1b21aff4c1f150eca25813a (diff) | |
MIPS: Add MAC2008 Support
MAC2008 means the processor implemented IEEE754 style Fused MADD
instruction. It was introduced in Release3 but removed in Release5.
The toolchain support of MAC2008 have never landed except for Loongson
processors.
This patch aimed to disabled the MAC2008 if it's optional. For
MAC2008 only processors, we corrected math-emu behavior to align
with actual hardware behavior.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
[paulburton@kernel.org: Fixup MIPSr2-r5 check in cpu_set_fpu_2008.]
Signed-off-by: Paul Burton <paulburton@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: chenhc@lemote.com
Cc: paul.burton@mips.com
Cc: linux-kernel@vger.kernel.org
Diffstat (limited to 'arch/mips/include/asm/cpu.h')
| -rw-r--r-- | arch/mips/include/asm/cpu.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/mips/include/asm/cpu.h b/arch/mips/include/asm/cpu.h index 0e10ffcf0c1b..216a22916740 100644 --- a/arch/mips/include/asm/cpu.h +++ b/arch/mips/include/asm/cpu.h @@ -416,6 +416,7 @@ enum cpu_type_enum { #define MIPS_CPU_MT_PER_TC_PERF_COUNTERS \ BIT_ULL(56) /* CPU has perf counters implemented per TC (MIPSMT ASE) */ #define MIPS_CPU_MMID BIT_ULL(57) /* CPU supports MemoryMapIDs */ +#define MIPS_CPU_MAC_2008_ONLY BIT_ULL(58) /* CPU Only support MAC2008 Fused multiply-add instruction */ /* * CPU ASE encodings |