1/* $FreeBSD$ */ 2/* $NetBSD: locore.S,v 1.24 2000/05/31 05:09:17 thorpej Exp $ */ 3 4/* 5 * Copyright (C) 2001 Benno Rice 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 25 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 26 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28/* 29 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 30 * Copyright (C) 1995, 1996 TooLs GmbH. 31 * All rights reserved. 32 * 33 * Redistribution and use in source and binary forms, with or without 34 * modification, are permitted provided that the following conditions 35 * are met: 36 * 1. Redistributions of source code must retain the above copyright 37 * notice, this list of conditions and the following disclaimer. 38 * 2. Redistributions in binary form must reproduce the above copyright 39 * notice, this list of conditions and the following disclaimer in the 40 * documentation and/or other materials provided with the distribution. 41 * 3. All advertising materials mentioning features or use of this software 42 * must display the following acknowledgement: 43 * This product includes software developed by TooLs GmbH. 44 * 4. The name of TooLs GmbH may not be used to endorse or promote products 45 * derived from this software without specific prior written permission. 46 * 47 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 48 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 49 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 50 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 51 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 52 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 53 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 54 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 55 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 56 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 57 */ 58 59#include "opt_ddb.h" 60#include "opt_ipkdb.h" 61#include "assym.s" 62 63#include <sys/syscall.h> 64 65#include <machine/trap.h> 66#include <machine/param.h> 67#include <machine/sr.h> 68#include <machine/spr.h> 69#include <machine/psl.h> 70#include <machine/asm.h> 71 72/* 73 * Some instructions gas doesn't understand (yet?) 74 */ 75#define bdneq bdnzf 2, 76 77/* 78 * Globals 79 */ 80 .data 81GLOBAL(tmpstk) 82 .space 8208 83GLOBAL(esym) 84 .long 0 /* end of symbol table */ 85 86GLOBAL(ofmsr) 87 .long 0 /* msr used in Open Firmware */ 88 89GLOBAL(powersave) 90 .long 0 91 92#define INTSTK 8192 /* 8K interrupt stack */ 93#define SPILLSTK 4096 /* 4K spill stack */ 94 95/* 96 * Dummy interrupt table to keep sysctl happy until 97 * it's worked out what to do with naming 98 */ 99GLOBAL(intrnames) 100 .asciz "dummy" 101GLOBAL(eintrnames) 102 .align 4 103GLOBAL(intrcnt) 104 .long 0 105GLOBAL(eintrcnt) 106 107/* 108 * File-scope for locore.S 109 */ 110idle_u: 111 .long 0 /* fake uarea during idle after exit */ 112openfirmware_entry: 113 .long 0 /* openfirmware entry point */ 114srsave: 115 .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 116 117/* 118 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 119 * mark the start of kernel text. 120 */ 121 .text 122 .globl kernel_text 123kernel_text: 124 125/* 126 * Startup entry. Note, this must be the first thing in the text 127 * segment! 128 */ 129 .text 130 .globl __start 131__start: 132#ifdef FIRMWORKSBUGS 133 mfmsr 0 134 andi. 0,0,PSL_IR|PSL_DR 135 beq 1f 136 137 bl ofwr_init 1381: 139#endif 140 li 8,0 141 li 9,0x100 142 mtctr 9 1431: 144 dcbf 0,8 145 icbi 0,8 146 addi 8,8,0x20 147 bdnz 1b 148 sync 149 isync 150 151 /* Save the argument pointer and length */ 152 mr 20,6 153 mr 21,7 154 155 lis 8,openfirmware_entry@ha 156 stw 5,openfirmware_entry@l(8) /* save client interface handler */ 157 mr 3,5 158 159 lis 1,tmpstk@ha 160 addi 1,1,tmpstk@l 161 addi 1,1,8192 162 163 mfmsr 0 164 lis 9,ofmsr@ha 165 stw 0,ofmsr@l(9) 166 167 bl OF_init 168 169 lis 4,end@ha 170 addi 4,4,end@l 171 mr 5,4 172 173 lis 3,kernel_text@ha 174 addi 3,3,kernel_text@l 175 176 /* Restore the argument pointer and length */ 177 mr 6,20 178 mr 7,21 179 180 bl powerpc_init 181 bl mi_startup 182 b OF_exit 183 184/* 185 * int setfault() 186 * 187 * Similar to setjmp to setup for handling faults on accesses to user memory. 188 * Any routine using this may only call bcopy, either the form below, 189 * or the (currently used) C code optimized, so it doesn't use any non-volatile 190 * registers. 191 */ 192 .globl setfault 193setfault: 194 mflr 0 195 mfcr 12 196 mfsprg 4,0 197 lwz 4,PC_CURTHREAD(4) 198 lwz 4,TD_PCB(4) 199 stw 3,PCB_ONFAULT(4) 200 stw 0,0(3) 201 stw 1,4(3) 202 stw 2,8(3) 203 stmw 12,12(3) 204 xor 3,3,3 205 blr 206 207#include <powerpc/powerpc/trap_subr.S> 208