NetBSD/sys/arch/evbppc/ev64260/ev64260_locore.S

305 lines
6.1 KiB
ArmAsm

/* $NetBSD: ev64260_locore.S,v 1.6 2003/07/31 07:50:05 matt Exp $ */
/* $OpenBSD: locore.S,v 1.4 1997/01/26 09:06:38 rahnds Exp $ */
/*
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
* Copyright (C) 1995, 1996 TooLs GmbH.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "opt_ddb.h"
#include "fs_kernfs.h"
#include "opt_ppcparam.h"
#include "opt_ipkdb.h"
#include "opt_multiprocessor.h"
#include "opt_openpic.h"
#include "assym.h"
#include <sys/syscall.h>
#include <machine/param.h>
#include <machine/vmparam.h>
#include <machine/pmap.h>
#include <machine/psl.h>
#include <machine/trap.h>
#define _NOREGNAMES
#include <machine/asm.h>
#include <powerpc/spr.h>
#include <powerpc/oea/bat.h>
#include <powerpc/oea/hid.h>
/*
* Some instructions gas doesn't understand (yet?)
*/
#define bdneq bdnzf 2,
/*
* Globals
*/
GLOBAL(startsym)
.long 0 /* start symbol table */
GLOBAL(endsym)
.long 0 /* end symbol table */
GLOBAL(proc0paddr)
.long 0 /* proc0 p_addr */
GLOBAL(intrnames)
GLOBAL(eintrnames)
GLOBAL(intrcnt)
GLOBAL(eintrcnt)
.long 0 /* vmstat needs these. XXX */
/*
* File-scope for locore.S
*/
#ifdef DINK
.data
dink_return:
.long 0 /* fake uarea during idle after exit */
dink_stack:
.long 0 /* fake uarea during idle after exit */
#endif
/*
* This symbol is here for the benefit of kvm_mkdb, and is supposed to
* mark the start of kernel text.
*/
.text
.globl _C_LABEL(kernel_text)
_C_LABEL(kernel_text):
/*
* Startup entry. Note, this must be the first thing in the text
* segment!
*/
.text
.globl __start
__start:
#ifdef DINK
mflr 0
lis 8, dink_stack@ha
stw 1, dink_stack@l(8)
lis 8, dink_return@ha
stw 0, dink_return@l(8)
#endif
#if 0
eieio; sync
lis 8, 0xf100f104@ha
lwz 7, -3836(8)
li 0, 1
andc 7,7,0
stw 7, -3836(8)
eieio; sync
#endif
/*
* Make sure that .bss is zeroed.
*/
li 0,0
lis 8,edata@ha
addi 8,8,edata@l
lis 9,end@ha
addi 9,9,end@l
5: cmpw 0,8,9 /* edata & end are >= word aligned */
bge 6f
stw 0,0(8)
addi 8,8,4
b 5b
6:
li 0,0
mtmsr 0 /* Disable FPU/MMU/exceptions */
sync ; isync
#if 1
mfpvr 0
srwi 0,0,16
cmplwi 0,MPC7410
bne 16f
#if 0
/* flush and disable L2 */
mfspr 8,SPR_L2CR
lis 0,(L2CR_L2E|L2CR_L2WT)@h /* disable the L2 mode */
andc 8,8,0
ori 8,8,L2CR_L2HWF /* enable hardware flush */
sync
mtspr SPR_L2CR,8 /* do it */
sync /* wait for it to finish */
/* Disable data lock mode */
mfspr 8,SPR_HID0
li 0,HID0_DLOCK
andc 8,8,0
mtspr SPR_HID0,8
sync
#endif
#if 0
/*
* Flush the L1 cache
*/
mfspr 8,SPR_MSSCR0
oris 8,8,MSSCR0_DL1HWF@h
sync
mtspr SPR_MSSCR0,8
sync
#endif
#if 1
/* disable data and instruction caches */
mfspr 8,SPR_HID0
li 0,HID0_DLOCK@l
andc 8,8,0
sync
mtspr SPR_HID0,8
sync
isync
#endif
7:
#if 0
/* disable data and instruction caches */
mfspr 8,SPR_HID0
li 0,(HID0_ICE|HID0_DCE)@l
andc 8,8,0
sync
mtspr SPR_HID0,8
sync
isync
#endif
7:
#if 0
/* Enable and flush data and instruction caches */
ori 8,8,(HID0_ICFI|HID0_ICE|HID0_DCFI|HID0_DCE)
# ori 8,8,(HID0_ICFI|HID0_ICE)
mtspr SPR_HID0,8
isync
8: sync
mfspr 8,SPR_HID0
andi. 0,8,(HID0_ICFI|HID0_DCFI)
bne 8b
#endif
#if 0
mfspr 8,SPR_L2CR
oris 8,8,L2CR_L2E@h
sync
mtspr SPR_L2CR,8
sync
#endif
16:
#endif
/* compute end of kernel memory */
lis 8,_C_LABEL(end)@ha
addi 8,8,_C_LABEL(end)@l
#if NKSYMS || defined(DDB) || defined(LKM) || defined(KERNFS)
lis 7,_C_LABEL(startsym)@ha
addi 7,7,_C_LABEL(startsym)@l
stw 3,0(7)
lis 7,_C_LABEL(endsym)@ha
addi 7,7,_C_LABEL(endsym)@l
stw 4,0(7)
/* mr 8,4 * end of symbol table */
#endif
mr 4,8 /* end of mem reserved for kernel */
INIT_CPUINFO(4,1,9,0)
lis 3,__start@ha
addi 3,3,__start@l
li 5,0
li 6,0
bl _C_LABEL(initppc)
bl _C_LABEL(main)
loop: b loop /* XXX not reached */
#if 0
.globl _C_LABEL(extintr_enable)
_C_LABEL(extintr_enable):
mfmsr 3
ori 3,3,PSL_EE@l
sync
mtmsr 3
blr
.globl _C_LABEL(extintr_restore)
_C_LABEL(extintr_restore):
mfmsr 4
or 3,4,3
sync
mtmsr 3
blr
.globl _C_LABEL(extintr_disable)
_C_LABEL(extintr_disable):
mfmsr 3
andi. 4,3,~PSL_EE@l
sync
mtmsr 4
andi. 3,3,PSL_EE@l
blr
.globl _C_LABEL(mvpppc_reboot)
_C_LABEL(mvpppc_reboot):
mfmsr 3
ori 3,3,PSL_IP@l
sync
mtmsr 3
b 0xFFF00100
#endif
#ifdef DINK
.globl _C_LABEL(return_to_dink)
_C_LABEL(return_to_dink):
sync
lis 4, dink_stack@ha
lwz 1, dink_stack@l(4)
lis 4, dink_return@ha
lwz 5, dink_return@l(4)
mtlr 5
blr
#endif
/*
* Include common switch / setfault code
*/
#include <powerpc/powerpc/locore_subr.S>
/*
* Include common trap / execption code
*/
#include <powerpc/powerpc/trap_subr.S>
/*
* Include PIO routines
*/
#include <powerpc/powerpc/pio_subr.S>