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- convert to register prefixes

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- zero out BSS before we start calling into C code instead of memset()
  (pulled from macppc/stand/ofwboot/Locore.c rev 1.16)
This commit is contained in:
tsutsui 2007-05-21 13:20:03 +00:00
parent 29070a7e6e
commit b69e9377c9
1 changed files with 28 additions and 14 deletions
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42
sys/arch/ofppc/stand/ofwboot/Locore.c
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@ -1,4 +1,4 @@
/* $NetBSD: Locore.c,v 1.14 2006/01/27 04:11:41 uwe Exp $ */
/* $NetBSD: Locore.c,v 1.15 2007/05/21 13:20:03 tsutsui Exp $ */
/*
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
@ -50,21 +50,37 @@ __asm(
" .text \n"
" .globl _start \n"
"_start: \n"
" li 8,0 \n"
" li 9,0x100 \n"
" mtctr 9 \n"
" li %r8,0 \n"
" li %r9,0x100 \n"
" mtctr %r9 \n"
"1: \n"
" dcbf 0,8 \n"
" icbi 0,8 \n"
" addi 8,8,0x20 \n"
" dcbf 0,%r8 \n"
" icbi 0,%r8 \n"
" addi %r8,%r8,0x20 \n"
" bdnz 1b \n"
" sync \n"
" isync \n"
" lis 1,stack@ha \n"
" addi 1,1,stack@l \n"
" addi 1,1,8192 \n"
" b startup \n"
" lis %r1,stack@ha \n"
" addi %r1,%r1,stack@l \n"
" addi %r1,%r1,8192 \n"
" \n"
/*
* Make sure that .bss is zeroed
*/
" \n"
" li %r0,0 \n"
" lis %r8,_edata@ha \n"
" addi %r8,%r8,_edata@l \n"
" lis %r9,_end@ha \n"
" addi %r9,%r9,_end@l \n"
" \n"
"2: cmpw 0,%r8,%r9 \n"
" bge 3f \n"
" stw %r0,0(%r8) \n"
" addi %r8,%r8,4 \n"
" b 2b \n"
" \n"
"3: b startup \n"
);
static int
@ -82,9 +98,7 @@ openfirmware(void *arg)
static void
startup(void *vpd, int res, int (*openfirm)(void *), char *arg, int argl)
{
extern char _end[], _edata[];
memset(_edata, 0, (_end - _edata));
openfirmware_entry = openfirm;
setup();
main();