/* $NetBSD: locore.S,v 1.75 2021/02/11 19:06:24 macallan 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 "opt_kgdb.h"
#include "opt_lockdebug.h"
#include "opt_modular.h"
#include "opt_multiprocessor.h"
#include "opt_altivec.h"
#include "opt_ppcparam.h"
#include "ksyms.h"
#include "assym.h"
#include <sys/syscall.h>
#include <machine/param.h>
#include <machine/psl.h>
#include <machine/trap.h>
#include <machine/asm.h>
#include <powerpc/spr.h>
#include <powerpc/oea/spr.h>
/*
* Some instructions gas doesn't understand (yet?)
*/
#define bdneq bdnzf 2,
/*
* Globals
*/
.data
GLOBAL(esym)
.long 0 /* end of symbol table */
GLOBAL(oeacpufeat)
.long 0 /* cpu features */
/*
* 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:
bl _C_LABEL(ofwinit) /* init OF */
mr 13,6
mr 14,7
bl _C_LABEL(cpu_model_init) /* init oeacpufeat */
li 0,0
#ifndef FIRMWORKSBUGS
mtmsr 0 /* Disable FPU/MMU/exceptions */
#endif
isync
/* compute end of kernel memory */
lis 4,_C_LABEL(end)@ha
addi 4,4,_C_LABEL(end)@l
#if NKSYMS || defined(DDB) || defined(MODULAR)
/* skip symbol table */
mr 6,13
mr 7,14
cmpwi 6,0
beq 1f
add 9,6,7 /* r9 = args + l */
lwz 9,-8(9) /* esym */
cmpwi 9,0
beq 1f
mr 4,9
1:
#endif
#if defined (PMAC_G5) || defined (MAMBO)
/* and clear HID5 DCBZ bits (56/57), need to do this early */
mfspr 11,SPR_HID5
rldimi 11,0,6,56
sync
mtspr SPR_HID5,11
isync
sync
/* Setup HID1 features, prefetch + i-cacheability controlled by PTE */
mfspr 0,SPR_HID1
li 11,0x1200
sldi 11,11,44
or 0,0,11
mtspr SPR_HID1,0
isync
sync
/* Restore r0 */
li 0,0
#endif /* PMAC_G5 */
/*
* Initialize cpu_info[0]
*/
INIT_CPUINFO(4,1,9,0)
lis 3,__start@ha
addi 3,3,__start@l
mr 5,6 /* args string */
bl _C_LABEL(initppc)
bl _C_LABEL(main)
b _C_LABEL(OF_exit)
#if defined (PPC_OEA64_BRIDGE)
/* Return all 64 bits of HID4 */
.text
.globl _C_LABEL(mfhid4)
_C_LABEL(mfhid4):
mfspr 4, SPR_HID4
std 4, 0(3)
blr
/* Set all 64 bits of HID4 */
.text
.globl _C_LABEL(mthid4)
_C_LABEL(mthid4):
ld 4, 0(3)
sync
mtspr SPR_HID4, 4
isync
isync
blr
.text
.globl _C_LABEL(change_hid4)
_C_LABEL(change_hid4):
mfspr 6, SPR_HID4
rldicl 5, 6, 32, 0
ori 5, 5, 0x100
rldicl 5, 5, 32, 0
std 5, 0(3)
blr
#endif
/*
* Pull in common Open Firmware code.
*/
#include <powerpc/oea/ofw_subr.S>
/*
* Pull in common switch and setfault code.
*/
#include <powerpc/powerpc/locore_subr.S>
/*
* Pull in common trap vector code.
*/
#include <powerpc/powerpc/trap_subr.S>
/*
* Pull in common pio / bus_space code.
*/
#include <powerpc/powerpc/pio_subr.S>