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| author | jasone <jasone@FreeBSD.org> | 2000-09-07 01:33:02 +0000 |
|---|---|---|
| committer | jasone <jasone@FreeBSD.org> | 2000-09-07 01:33:02 +0000 |
| commit | 769e0f974d8929599ba599ac496510fffc90ff34 (patch) | |
| tree | 9387522900085835de81e7830e570ef3f6b3ea80 /sys/amd64/amd64/initcpu.c | |
| parent | acf1927de02afda4855ec278b1128fd9446405ea (diff) | |
| download | FreeBSD-src-769e0f974d8929599ba599ac496510fffc90ff34.zip FreeBSD-src-769e0f974d8929599ba599ac496510fffc90ff34.tar.gz | |
Major update to the way synchronization is done in the kernel. Highlights
include:
* Mutual exclusion is used instead of spl*(). See mutex(9). (Note: The
alpha port is still in transition and currently uses both.)
* Per-CPU idle processes.
* Interrupts are run in their own separate kernel threads and can be
preempted (i386 only).
Partially contributed by: BSDi (BSD/OS)
Submissions by (at least): cp, dfr, dillon, grog, jake, jhb, sheldonh
Diffstat (limited to 'sys/amd64/amd64/initcpu.c')
| -rw-r--r-- | sys/amd64/amd64/initcpu.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/sys/amd64/amd64/initcpu.c b/sys/amd64/amd64/initcpu.c index be86c65..b9395bf 100644 --- a/sys/amd64/amd64/initcpu.c +++ b/sys/amd64/amd64/initcpu.c @@ -607,12 +607,14 @@ void enable_K5_wt_alloc(void) { u_int64_t msr; + int intrstate; /* * Write allocate is supported only on models 1, 2, and 3, with * a stepping of 4 or greater. */ if (((cpu_id & 0xf0) > 0) && ((cpu_id & 0x0f) > 3)) { + intrstate = save_intr(); disable_intr(); msr = rdmsr(0x83); /* HWCR */ wrmsr(0x83, msr & !(0x10)); @@ -645,7 +647,7 @@ enable_K5_wt_alloc(void) msr=rdmsr(0x83); wrmsr(0x83, msr|0x10); /* enable write allocate */ - enable_intr(); + restore_intr(intrstate); } } @@ -708,7 +710,6 @@ enable_K6_wt_alloc(void) wrmsr(0x0c0000082, whcr); write_eflags(eflags); - enable_intr(); } void @@ -770,7 +771,6 @@ enable_K6_2_wt_alloc(void) wrmsr(0x0c0000082, whcr); write_eflags(eflags); - enable_intr(); } #endif /* I585_CPU && CPU_WT_ALLOC */ |
