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/* Locate the per-CPU data structure */ 70#define GET_CPUINFO(r) \ 71 mfsprg0 r 72 73/* 74 * Compiled KERNBASE location and the kernel load address 75 */ 76 .globl kernbase 77 .set kernbase, KERNBASE 78 79#define TMPSTKSZ 8192 /* 8K temporary stack */ 80 81/* 82 * Globals 83 */ 84 .data 85 .align 4 86GLOBAL(tmpstk) 87 .space TMPSTKSZ 88GLOBAL(esym) 89 .long 0 /* end of symbol table */ 90 91#define INTRCNT_COUNT 256 /* max(HROWPIC_IRQMAX,OPENPIC_IRQMAX) */ 92GLOBAL(intrnames) 93 .space INTRCNT_COUNT * (MAXCOMLEN + 1) * 2 94GLOBAL(sintrnames) 95 .long INTRCNT_COUNT * (MAXCOMLEN + 1) * 2 96 97 .align 4 98GLOBAL(intrcnt) 99 .space INTRCNT_COUNT * 4 * 2 100GLOBAL(sintrcnt) 101 .long INTRCNT_COUNT * 4 * 2 102 103 .text 104 .globl btext 105btext: 106 107/* 108 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 109 * mark the start of kernel text. 110 */ 111 .globl kernel_text 112kernel_text: 113 114/* 115 * Startup entry. Note, this must be the first thing in the text 116 * segment! 117 */ 118 .text 119 .globl __start 120__start: 121 li 8,0 122 li 9,0x100 123 mtctr 9 1241: 125 dcbf 0,8 126 icbi 0,8 127 addi 8,8,0x20 128 bdnz 1b 129 sync 130 isync 131#ifdef WII 132#include <powerpc/wii/locore.S> 133#endif 134 /* Zero bss, in case we were started by something unhelpful */ 135 li 0,0 136 lis 8,_edata@ha 137 addi 8,8,_edata@l 138 lis 9,_end@ha 139 addi 9,9,_end@l 1402: stw 0,0(8) 141 addi 8,8,4 142 cmplw 8,9 143 blt 2b 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 */ 151 152 lis 1,(tmpstk+TMPSTKSZ-16)@ha 153 addi 1,1,(tmpstk+TMPSTKSZ-16)@l 154 155 mfmsr 0 156 lis 9,ofmsr@ha 157 stwu 0,ofmsr@l(9) 158 159 mfsprg0 0 /* save SPRG0-3 */ 160 stw 0,4(9) /* ofmsr[1] = sprg0 */ 161 mfsprg1 0 162 stw 0,8(9) /* ofmsr[2] = sprg1 */ 163 mfsprg2 0 164 stw 0,12(9) /* ofmsr[3] = sprg2 */ 165 mfsprg3 0 166 stw 0,16(9) /* ofmsr[4] = sprg3 */ 167 168 bl OF_initial_setup 169 170 lis 3,kernel_text@ha 171 addi 3,3,kernel_text@l 172 173 lis 4,end@ha 174 addi 4,4,end@l 175 add 4,4,3 176 mr 5,4 177 178 /* Restore the argument pointer and length */ 179 mr 6,20 180 mr 7,21 181 182 bl powerpc_init 183 mr %r1, %r3 184 li %r3, 0 185 stw %r3, 0(%r1) 186 bl mi_startup 187 b OF_exit 188 189/* 190 * int setfault() 191 * 192 * Similar to setjmp to setup for handling faults on accesses to user memory. 193 * Any routine using this may only call bcopy, either the form below, 194 * or the (currently used) C code optimized, so it doesn't use any non-volatile 195 * registers. 196 */ 197 .globl setfault 198setfault: 199 mflr 0 200 mfcr 12 201 mfsprg 4,0 202 lwz 4,TD_PCB(2) /* curthread = r2 */ 203 stw 3,PCB_ONFAULT(4) 204 stw 0,0(3) 205 stw 1,4(3) 206 stw 2,8(3) 207 stmw 12,12(3) 208 xor 3,3,3 209 blr 210 211#include <powerpc/aim/trap_subr32.S> 212