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Xintr_lapic_tlb_bcast: saving and restoring %ds may take up to 100 cycles.

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Just access the globals using %ss.
This commit is contained in:
ad 2007-12-01 22:34:28 +00:00
parent adc8fdec92
commit f8e6fbe610
1 changed files with 7 additions and 11 deletions
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18
sys/arch/i386/i386/vector.S
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@ -1,4 +1,4 @@
/* $NetBSD: vector.S,v 1.29 2007/11/14 17:55:00 ad Exp $ */
/* $NetBSD: vector.S,v 1.30 2007/12/01 22:34:28 ad Exp $ */
/*
* Copyright 2002 (c) Wasabi Systems, Inc.
@ -253,27 +253,23 @@ IDTVEC(intr_lapic_tlb_bcast)
pushl %eax
pushl %ebx
pushl %edx
pushl %ds
movl $GSEL(GDATA_SEL, SEL_KPL), %eax
movl %eax, %ds
/* Find out what we need to invalidate. */
movl _C_LABEL(pmap_mbox)+MB_ADDR1, %eax
movl _C_LABEL(pmap_mbox)+MB_ADDR2, %edx
movl _C_LABEL(pmap_mbox)+MB_GLOBAL, %ebx
movl $0, _C_LABEL(local_apic)+LAPIC_EOI
movl %ss:_C_LABEL(pmap_mbox)+MB_ADDR1, %eax
movl %ss:_C_LABEL(pmap_mbox)+MB_ADDR2, %edx
movl %ss:_C_LABEL(pmap_mbox)+MB_GLOBAL, %ebx
movl $0, %ss:_C_LABEL(local_apic)+LAPIC_EOI
cmpl $-1, %eax
je,pn 3f
1:
/* Invalidate a single page or a range of pages. */
invlpg (%eax)
invlpg %ss:(%eax)
addl $PAGE_SIZE, %eax
cmpl %edx, %eax
jb 1b
2:
/* Ack the request, restore state & return. */
lock
incl _C_LABEL(pmap_mbox)+MB_TAIL
popl %ds
incl %ss:_C_LABEL(pmap_mbox)+MB_TAIL
popl %edx
popl %ebx
popl %eax