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Simplify doboot().

This commit is contained in:
briggs 1995-09-16 15:35:05 +00:00
parent ea4e385abd
commit ccaff4431c
1 changed files with 1 additions and 20 deletions
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21
sys/arch/mac68k/mac68k/locore.s
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@ -1,4 +1,4 @@
/* $NetBSD: locore.s,v 1.47 1995/09/02 05:44:07 briggs Exp $ */
/* $NetBSD: locore.s,v 1.48 1995/09/16 15:35:05 briggs Exp $ */
/*
* Copyright (c) 1988 University of Utah.
@ -1942,27 +1942,8 @@ _doboot:
movl #CACHE_OFF,d0
movc d0,cacr | disable on-chip cache(s)
cmpl #MMU_68040, _mmutype
jeq Lreboot | go ahead and reboot if '040
cmpl #MMU_68030, _mmutype
jeq Lmap030rom | don't turn off MMU if '030
lea longscratch,a0 | make sure we have real memory
movl #0,a0@ | value for pmove to TC (turn off MMU)
pmove a0@,tc | disable MMU
jra Lreboot
| If '030, we can't turn off MMU because we might not be PA == VA.
| We must therefore map the ROMs using the tt registers before
| we jump there.
Lmap030rom:
lea longscratch,a0
movl #0x400F8307,a0@ | map all of 0x4xxxxxxx
.long 0xf0100800 | pmove a0@,tt0
movl _MacOSROMBase, _ROMBase | Load MacOS ROMBase
Lreboot:
movl #0x90,a1 | offset of ROM reset routine
addl _ROMBase,a1 | add to ROM base
jra a1@ | and jump to ROM to reset machine