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authorPaul Burton <paul.burton@imgtec.com>2014-03-27 10:57:01 +0000
committerRalf Baechle <ralf@linux-mips.org>2014-03-31 18:17:12 +0200
commit968a0734db05ad907bc8fffabdbe7da5e1e731f6 (patch)
tree61a4dcad59737a6c23c841489edfe3c46b296846
parentd94c90f8050e1e7d46a4217909af106a08dd31ea (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.h11
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;