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MIPS: Detect the MSA ASE

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This patch adds support for probing the MSAP bit within the Config3
register in order to detect the presence of the MSA ASE. Presence of the
ASE will be indicated in /proc/cpuinfo. The value of the MSA
implementation register will be displayed at boot to aid debugging and
verification of a correct setup, as is done for the FPU.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6430/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Paul Burton
2014-01-27 15:23:10 +00:00
committed by Ralf Baechle
parent 7f65afb97f
commit a5e9a69e2c
6 changed files with 50 additions and 0 deletions
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6
arch/mips/include/asm/cpu-features.h
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@@ -299,4 +299,10 @@
#define cpu_has_vz (cpu_data[0].ases & MIPS_ASE_VZ)
#endif
#if defined(CONFIG_CPU_HAS_MSA) && !defined(cpu_has_msa)
# define cpu_has_msa (cpu_data[0].ases & MIPS_ASE_MSA)
#elif !defined(cpu_has_msa)
# define cpu_has_msa 0
#endif
#endif /* __ASM_CPU_FEATURES_H */

1
arch/mips/include/asm/cpu-info.h
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@@ -49,6 +49,7 @@ struct cpuinfo_mips {
unsigned long ases;
unsigned int processor_id;
unsigned int fpu_id;
unsigned int msa_id;
unsigned int cputype;
int isa_level;
int tlbsize;

1
arch/mips/include/asm/cpu.h
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@@ -370,5 +370,6 @@ enum cpu_type_enum {
#define MIPS_ASE_MIPSMT 0x00000020 /* CPU supports MIPS MT */
#define MIPS_ASE_DSP2P 0x00000040 /* Signal Processing ASE Rev 2 */
#define MIPS_ASE_VZ 0x00000080 /* Virtualization ASE */
#define MIPS_ASE_MSA 0x00000100 /* MIPS SIMD Architecture */
#endif /* _ASM_CPU_H */