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MIPS: MT: core_nvpes function to retrieve VPE count

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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>
This commit is contained in:
Paul Burton 2014-03-27 10:57:01 +00:00 committed by Ralf Baechle
parent d94c90f805
commit 968a0734db
1 changed files with 11 additions and 0 deletions
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11
arch/mips/include/asm/mipsmtregs.h
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@ -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;