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use branch slot in pmap_copy_page.

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This commit is contained in:
petrov 2003-04-04 21:35:39 +00:00
parent c8be46a52c
commit 7facff52bd
1 changed files with 7 additions and 13 deletions
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20
sys/arch/sparc64/sparc64/locore.s
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@ -1,4 +1,4 @@
/* $NetBSD: locore.s,v 1.173 2003/03/24 13:27:44 nakayama Exp $ */
/* $NetBSD: locore.s,v 1.174 2003/04/04 21:35:39 petrov Exp $ */
/*
* Copyright (c) 1996-2002 Eduardo Horvath
@ -8600,6 +8600,7 @@ ENTRY(pmap_zero_page)
flush %o3
retl
wr %g0, ASI_PRIMARY_NOFAULT, %asi ! Make C code happy
/*
* pmap_copy_page(paddr_t src, paddr_t dst)
*
@ -8607,19 +8608,19 @@ ENTRY(pmap_zero_page)
* We need to use a global reg for ldxa/stxa
* so the top 32-bits cannot be lost if we take
* a trap and need to save our stack frame to a
* 32-bit stack. We will unroll the loop by 8 to
* 32-bit stack. We will unroll the loop by 4 to
* improve performance.
*
* We also need to blast the D$ and flush like
* pmap_zero_page.
* XXX We also need to blast the D$ and flush like
* XXX pmap_zero_page.
*/
ENTRY(pmap_copy_page)
#ifndef _LP64
!!
!! If we have 64-bit physical addresses (and we do now)
!! we need to move the pointer from %o0:%o1 to %o0 and
!! %o2:%o3 to %o1
!!
#ifndef _LP64
#if PADDRT == 8
COMBINE(%o0, %o1, %o0)
COMBINE(%o2, %o3, %o1)
@ -8645,12 +8646,6 @@ ENTRY(pmap_copy_page)
3:
#endif
#if 1
/*
* XXXX
* We will make use of all global regs. This may cause problems
* if we ever decide to store static data in a global reg, like
* a pointer to curcpu or something.
*/
set NBPG, %o2
wr %g0, ASI_PHYS_CACHED, %asi
1:
@ -8666,9 +8661,8 @@ ENTRY(pmap_copy_page)
stxa %o5, [%o1 + 0x18] %asi
bg,pt %icc, 1b ! We don't care about pages >4GB
inc 0x20, %o1
wr %g0, ASI_PRIMARY_NOFAULT, %asi
retl
clr %g4 ! Restore g4
wr %g0, ASI_PRIMARY_NOFAULT, %asi
#else
set NBPG, %o3
add %o3, %o0, %o3