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/* Locate the per-CPU data structure */ 73#define GET_CPUINFO(r) \ 74 mfsprg0 r 75 76/* 77 * Globals 78 */ 79 .data 80GLOBAL(tmpstk) 81 .space 8208 82GLOBAL(esym) 83 .long 0 /* end of symbol table */ 84 85GLOBAL(ofmsr) 86 .long 0 /* msr used in Open Firmware */ 87 88GLOBAL(powersave) 89 .long 0 90 91#define INTSTK 8192 /* 8K interrupt stack */ 92#define INTRCNT_COUNT 256 /* max(HROWPIC_IRQMAX,OPENPIC_IRQMAX) */ 93GLOBAL(intrnames) 94 .space INTRCNT_COUNT * (MAXCOMLEN + 1) * 2 95GLOBAL(eintrnames) 96 .align 4 97GLOBAL(intrcnt) 98 .space INTRCNT_COUNT * 4 * 2 99GLOBAL(eintrcnt) 100 101/* 102 * File-scope for locore.S 103 */ 104idle_u: 105 .long 0 /* fake uarea during idle after exit */ 106openfirmware_entry: 107 .long 0 /* openfirmware entry point */ 108srsave: 109 .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 110 111/* 112 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 113 * mark the start of kernel text. 114 */ 115 .text 116 .globl kernel_text 117kernel_text: 118 119/* 120 * Startup entry. Note, this must be the first thing in the text 121 * segment! 122 */ 123 .text 124 .globl __start 125__start: 126#ifdef FIRMWORKSBUGS 127 mfmsr 0 128 andi. 0,0,PSL_IR|PSL_DR 129 beq 1f 130 131 bl ofwr_init 1321: 133#endif 134 li 8,0 135 li 9,0x100 136 mtctr 9 1371: 138 dcbf 0,8 139 icbi 0,8 140 addi 8,8,0x20 141 bdnz 1b 142 sync 143 isync 144 145 /* Save the argument pointer and length */ 146 mr 20,6 147 mr 21,7 148 149 lis 8,openfirmware_entry@ha 150 stw 5,openfirmware_entry@l(8) /* save client interface handler */ 151 mr 3,5 152 153 lis 1,tmpstk@ha 154 addi 1,1,tmpstk@l 155 addi 1,1,8192 156 157 mfmsr 0 158 lis 9,ofmsr@ha 159 stw 0,ofmsr@l(9) 160 161 bl OF_init 162 163 lis 4,end@ha 164 addi 4,4,end@l 165 mr 5,4 166 167 lis 3,kernel_text@ha 168 addi 3,3,kernel_text@l 169 170 /* Restore the argument pointer and length */ 171 mr 6,20 172 mr 7,21 173 174 bl powerpc_init 175 bl mi_startup 176 b OF_exit 177 178/* 179 * int setfault() 180 * 181 * Similar to setjmp to setup for handling faults on accesses to user memory. 182 * Any routine using this may only call bcopy, either the form below, 183 * or the (currently used) C code optimized, so it doesn't use any non-volatile 184 * registers. 185 */ 186 .globl setfault 187setfault: 188 mflr 0 189 mfcr 12 190 mfsprg 4,0 191 lwz 4,PC_CURTHREAD(4) 192 lwz 4,TD_PCB(4) 193 stw 3,PCB_ONFAULT(4) 194 stw 0,0(3) 195 stw 1,4(3) 196 stw 2,8(3) 197 stmw 12,12(3) 198 xor 3,3,3 199 blr 200 201#include <powerpc/powerpc/trap_subr.S> 202