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Query MVPConf0.PVPE for number of CPUs.

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Rather than hard-coding the number of CPUs to 2, look up the PVPE field
in MVPConf0, as the valid VPE numbers are from 0 to PVPE inclusive.

Submitted by:	"James Clarke" <jrtc4@cam.ac.uk>
Reviewed by:	br
Sponsored by:	DARPA, AFRL
Differential Revision:	https://reviews.freebsd.org/D16644
This commit is contained in:
Ruslan Bukin 2018-08-14 16:29:10 +00:00
parent ef52dc71eb
commit 5bcd113c91
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=337771
1 changed files with 7 additions and 3 deletions
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10
sys/mips/malta/malta_mp.c
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@ -48,9 +48,10 @@ __FBSDID("$FreeBSD$");
#include <machine/md_var.h>
#include <machine/smp.h>
#define MALTA_MAXCPU 2
#define VPECONF0_VPA (1 << 0)
#define MVPCONTROL_VPC (1 << 1)
#define MVPCONF0_PVPE_SHIFT 10
#define MVPCONF0_PVPE_MASK (0xf << MVPCONF0_PVPE_SHIFT)
#define TCSTATUS_A (1 << 13)
unsigned malta_ap_boot = ~0;
@ -208,10 +209,13 @@ platform_init_ap(int cpuid)
void
platform_cpu_mask(cpuset_t *mask)
{
uint32_t i, m;
uint32_t i, ncpus, reg;
reg = mftc0(0, 2);
ncpus = ((reg & MVPCONF0_PVPE_MASK) >> MVPCONF0_PVPE_SHIFT) + 1;
CPU_ZERO(mask);
for (i = 0, m = 1 ; i < MALTA_MAXCPU; i++, m <<= 1)
for (i = 0; i < ncpus; i++)
CPU_SET(i, mask);
}