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Introduce mips3_TBRPL(); not used in this moment, to be useful to 

discard MachTLBUpdate() calls, however, the necessity of TLB entry
modification in such a way is under question because implementation
glitches on ASID management was straightened, those calls can be
sanely removed after all.
This commit is contained in:
nisimura 2000-05-09 09:50:17 +00:00
parent 5290363261
commit 34a943161d
1 changed files with 56 additions and 1 deletions
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57
sys/arch/mips/mips/locore_mips3.S
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@ -1,4 +1,4 @@
/* $NetBSD: locore_mips3.S,v 1.25 2000/04/21 14:14:55 shin Exp $ */
/* $NetBSD: locore_mips3.S,v 1.26 2000/05/09 09:50:17 nisimura Exp $ */
/*
* Copyright (c) 1997 Jonathan Stone (hereinafter referred to as the author)
@ -2381,6 +2381,61 @@ LEAF_NOPROFILE(mips3_TBIA)
mtc0 v1, MIPS_COP_0_STATUS # restore status register
END(mips3_TBIA)
/*
* void mips3_TBRPL(vpn1, vpn2, pte)
* probe TLB entry which has vpn1 address; if found, have it new
* entryHi and entryLo[01] pair as [vpn2, pte]
*/
LEAF_NOPROFILE(mips3_TBRPL)
mfc0 v1, MIPS_COP_0_STATUS
mtc0 zero, MIPS_COP_0_STATUS
dmfc0 v0, MIPS_COP_0_TLB_HI
li t0, (MIPS3_PG_HVPN | MIPS3_PG_ASID)
and a0, a0, t0
dmtc0 a0, MIPS_COP_0_TLB_HI
nop
nop
tlbp
nop
nop
mfc0 t1, MIPS_COP_0_TLB_INDEX
nop
nop
bltz t1, 9f
nop
tlbr
#nop
#nop
and t1, a1, MIPS3_PG_ODDPG
and a1, a1, t0
dsll a2, a2, 34
dsrl a2, a2, 34
or a2, a2, MIPS3_PG_G
li a0, MIPS3_PG_G
bnez t1, 1f
nop
0: #EVEN
dmtc0 a1, MIPS_COP_0_TLB_HI
dmtc0 a2, MIPS_COP_0_TLB_LO0
dmtc0 a0, MIPS_COP_0_TLB_LO1
b 2f
nop
1: #ODD
dmtc0 a1, MIPS_COP_0_TLB_HI
dmtc0 a0, MIPS_COP_0_TLB_LO0
dmtc0 a2, MIPS_COP_0_TLB_LO1
nop
nop
2:
tlbwi
nop
nop
9:
dmtc0 v0, MIPS_COP_0_TLB_HI
j ra
mtc0 v1, MIPS_COP_0_STATUS
END(mips3_TBRPL)
LEAF(mips3_Set64bit)
mfc0 v0, MIPS_COP_0_STATUS
lui v1, (MIPS3_SR_XX >> 16)