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 "assym.s" 60 61#include <sys/syscall.h> 62 63#include <machine/trap.h> 64#include <machine/param.h> 65#include <machine/spr.h> 66#include <machine/asm.h> 67#include "opt_platform.h" 68 69#include "opt_kdtrace.h" 70 71/* Locate the per-CPU data structure */ 72#define GET_CPUINFO(r) \ 73 mfsprg0 r 74 75/* 76 * Compiled KERNBASE location and the kernel load address 77 */ 78 .globl kernbase 79 .set kernbase, KERNBASE 80 81#define TMPSTKSZ 8192 /* 8K temporary stack */ 82 83/* 84 * Globals 85 */ 86 .data 87 .align 4 88GLOBAL(tmpstk) 89 .space TMPSTKSZ 90GLOBAL(esym) 91 .long 0 /* end of symbol table */ 92 93#define INTRCNT_COUNT 256 /* max(HROWPIC_IRQMAX,OPENPIC_IRQMAX) */ 94GLOBAL(intrnames) 95 .space INTRCNT_COUNT * (MAXCOMLEN + 1) * 2 96GLOBAL(sintrnames) 97 .long INTRCNT_COUNT * (MAXCOMLEN + 1) * 2 98 99 .align 4 100GLOBAL(intrcnt) 101 .space INTRCNT_COUNT * 4 * 2 102GLOBAL(sintrcnt) 103 .long INTRCNT_COUNT * 4 * 2 104 105 .text 106 .globl btext 107btext: 108 109/* 110 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 111 * mark the start of kernel text. 112 */ 113 .globl kernel_text 114kernel_text: 115 116/* 117 * Startup entry. Note, this must be the first thing in the text 118 * segment! 119 */ 120 .text 121 .globl __start 122__start: 123 li 8,0 124 li 9,0x100 125 mtctr 9 1261: 127 dcbf 0,8 128 icbi 0,8 129 addi 8,8,0x20 130 bdnz 1b 131 sync 132 isync 133#ifdef WII 134#include <powerpc/wii/locore.S> 135#endif 136 /* Zero bss, in case we were started by something unhelpful */ 137 li 0,0 138 lis 8,_edata@ha 139 addi 8,8,_edata@l 140 lis 9,_end@ha 141 addi 9,9,_end@l 1422: stw 0,0(8) 143 addi 8,8,4 144 cmplw 8,9 145 blt 2b 146 147 /* Save the argument pointer and length */ 148 mr 20,6 149 mr 21,7 150 151 lis 8,openfirmware_entry@ha 152 stw 5,openfirmware_entry@l(8) /* save client interface handler */ 153 154 lis 1,(tmpstk+TMPSTKSZ-16)@ha 155 addi 1,1,(tmpstk+TMPSTKSZ-16)@l 156 157 mfmsr 0 158 lis 9,ofmsr@ha 159 stwu 0,ofmsr@l(9) 160 161 mfsprg0 0 /* save SPRG0-3 */ 162 stw 0,4(9) /* ofmsr[1] = sprg0 */ 163 mfsprg1 0 164 stw 0,8(9) /* ofmsr[2] = sprg1 */ 165 mfsprg2 0 166 stw 0,12(9) /* ofmsr[3] = sprg2 */ 167 mfsprg3 0 168 stw 0,16(9) /* ofmsr[4] = sprg3 */ 169 170 bl OF_initial_setup 171 172 lis 3,kernel_text@ha 173 addi 3,3,kernel_text@l 174 175 lis 4,end@ha 176 addi 4,4,end@l 177 add 4,4,3 178 mr 5,4 179 180 /* Restore the argument pointer and length */ 181 mr 6,20 182 mr 7,21 183 184 bl powerpc_init 185 mr %r1, %r3 186 li %r3, 0 187 stw %r3, 0(%r1) 188 bl mi_startup 189 b OF_exit 190 191/* 192 * int setfault() 193 * 194 * Similar to setjmp to setup for handling faults on accesses to user memory. 195 * Any routine using this may only call bcopy, either the form below, 196 * or the (currently used) C code optimized, so it doesn't use any non-volatile 197 * registers. 198 */ 199 .globl setfault 200setfault: 201 mflr 0 202 mfcr 12 203 mfsprg 4,0 204 lwz 4,TD_PCB(2) /* curthread = r2 */ 205 stw 3,PCB_ONFAULT(4) 206 stw 0,0(3) 207 stw 1,4(3) 208 stw 2,8(3) 209 stmw 12,12(3) 210 xor 3,3,3 211 blr 212 213#include <powerpc/aim/trap_subr32.S> 214