diff options
| author | Paul Burton <paul.burton@imgtec.com> | 2014-03-27 10:57:01 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2014-03-31 18:17:12 +0200 |
| commit | 968a0734db05ad907bc8fffabdbe7da5e1e731f6 (patch) | |
| tree | 61a4dcad59737a6c23c841489edfe3c46b296846 | |
| parent | d94c90f8050e1e7d46a4217909af106a08dd31ea (diff) | |
MIPS: MT: core_nvpes function to retrieve VPE count
This function simply returns the number of VPEs present in the current
core, or 1 if the core does not implement the MT ASE. In SMP kernels
this will typically equal smp_num_siblings, however it will also be
usable in UP kernels and helps prepare for the possibility of a
heterogenous system where the VPE count is not the same across all
cores.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6665/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| -rw-r--r-- | arch/mips/include/asm/mipsmtregs.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/mips/include/asm/mipsmtregs.h b/arch/mips/include/asm/mipsmtregs.h index 38b7704ee376..6efa79a27b6a 100644 --- a/arch/mips/include/asm/mipsmtregs.h +++ b/arch/mips/include/asm/mipsmtregs.h @@ -176,6 +176,17 @@ #ifndef __ASSEMBLY__ +static inline unsigned core_nvpes(void) +{ + unsigned conf0; + + if (!cpu_has_mipsmt) + return 1; + + conf0 = read_c0_mvpconf0(); + return ((conf0 & MVPCONF0_PVPE) >> MVPCONF0_PVPE_SHIFT) + 1; +} + static inline unsigned int dvpe(void) { int res = 0; |