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Introduce MIPS_TBRPL() which replaces a TLB entry of given vaddr

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with new entryHi and entryLo pair iff found in TLB.  Works only
for KSEG2 this moment.  mips3 version will follow.
This commit is contained in:
nisimura 2000-04-16 09:00:26 +00:00
parent 72cbcc0079
commit 7717409808
1 changed files with 29 additions and 1 deletions
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30
sys/arch/mips/mips/locore_mips1.S
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@ -1,4 +1,4 @@
/* $NetBSD: locore_mips1.S,v 1.29 2000/04/11 04:53:57 nisimura Exp $ */
/* $NetBSD: locore_mips1.S,v 1.30 2000/04/16 09:00:26 nisimura Exp $ */
/*
* Copyright (c) 1992, 1993
@ -1658,6 +1658,34 @@ LEAF(mips1_TBIA)
mtc0 v1, MIPS_COP_0_STATUS # restore status register
END(mips1_TBIA)
/*
* void mips1_TBRPL(vpn1, vpn2, pte)
* probe TLB entry which has vpn1 address; if found, have it new
* entryHi and entryLo pair of [vpn2, pte]
*/
LEAF(mips1_TBRPL)
mfc0 v1, MIPS_COP_0_STATUS
mtc0 zero, MIPS_COP_0_STATUS
mfc0 v0, MIPS_COP_0_TLB_HI
nop
mtc0 a0, MIPS_COP_0_TLB_HI
nop
tlbp
mfc0 t0, MIPS_COP_0_TLB_INDEX
nop
bltz t0, 1f
nop
or a2, a2, MIPS1_PG_G
mtc0 a1, MIPS_COP_0_TLB_HI
mtc0 a2, MIPS_COP_0_TLB_LOW
nop
tlbwi
1:
mtc0 v0, MIPS_COP_0_TLB_HI
j ra
mtc0 v1, MIPS_COP_0_STATUS
END(mips1_TBRPL)
.data
mips1_excausesw:
####