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| author | kib <kib@FreeBSD.org> | 2010-06-05 15:59:59 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2010-06-05 15:59:59 +0000 |
| commit | 2d77212fe48ecc0a97a3c56ca4cb8dc37493a066 (patch) | |
| tree | bcc333531405cbc8269cbb94116e1781440b2ed4 /sys/amd64/amd64/mp_machdep.c | |
| parent | fbdcfea8cb5a809b733223e1c53a383040e1dc4b (diff) | |
| download | FreeBSD-src-2d77212fe48ecc0a97a3c56ca4cb8dc37493a066.zip FreeBSD-src-2d77212fe48ecc0a97a3c56ca4cb8dc37493a066.tar.gz | |
Introduce the x86 kernel interfaces to allow kernel code to use
FPU/SSE hardware. Caller should provide a save area that is chained
into the stack of the areas; pcb save_area for usermode FPU state is
on top. The pcb now contains a pointer to the current FPU saved area,
used during FPUDNA handling and context switches. There is also a
facility to allow the kernel thread to use pcb save_area.
Change the dreaded warnings "npxdna in kernel mode!" into the panics
when FPU usage is not registered.
KPI discussed with: fabient
Tested by: pho, fabient
Hardware provided by: Sentex Communications
MFC after: 1 month
Diffstat (limited to 'sys/amd64/amd64/mp_machdep.c')
| -rw-r--r-- | sys/amd64/amd64/mp_machdep.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/amd64/amd64/mp_machdep.c b/sys/amd64/amd64/mp_machdep.c index 4a44aba..5430b03 100644 --- a/sys/amd64/amd64/mp_machdep.c +++ b/sys/amd64/amd64/mp_machdep.c @@ -1247,7 +1247,7 @@ cpususpend_handler(void) rf = intr_disable(); cr3 = rcr3(); - stopfpu = &stopxpcbs[cpu]->xpcb_pcb.pcb_save; + stopfpu = stopxpcbs[cpu]->xpcb_pcb.pcb_save; if (savectx2(stopxpcbs[cpu])) { fpugetregs(curthread, stopfpu); wbinvd(); |
