locore32.S revision 186347
1/* $FreeBSD: head/sys/powerpc/aim/locore.S 186347 2008-12-20 00:33:10Z nwhitehorn $ */ 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/sr.h> 66#include <machine/spr.h> 67#include <machine/psl.h> 68#include <machine/asm.h> 69 70/* Locate the per-CPU data structure */ 71#define GET_CPUINFO(r) \ 72 mfsprg0 r 73 74/* 75 * Compiled KERNBASE location and the kernel load address 76 */ 77 .globl kernbase 78 .set kernbase, KERNBASE 79 80#define TMPSTKSZ 8192 /* 8K temporary stack */ 81 82/* 83 * Globals 84 */ 85 .data 86 .align 4 87GLOBAL(tmpstk) 88 .space TMPSTKSZ 89GLOBAL(esym) 90 .long 0 /* end of symbol table */ 91 92GLOBAL(ofmsr) 93 .long 0, 0, 0, 0, 0 /* msr/sprg0-3 used in Open Firmware */ 94 95#define INTRCNT_COUNT 256 /* max(HROWPIC_IRQMAX,OPENPIC_IRQMAX) */ 96GLOBAL(intrnames) 97 .space INTRCNT_COUNT * (MAXCOMLEN + 1) * 2 98GLOBAL(eintrnames) 99 .align 4 100GLOBAL(intrcnt) 101 .space INTRCNT_COUNT * 4 * 2 102GLOBAL(eintrcnt) 103 104/* 105 * File-scope for locore.S 106 */ 107idle_u: 108 .long 0 /* fake uarea during idle after exit */ 109openfirmware_entry: 110 .long 0 /* Open Firmware entry point */ 111srsave: 112 .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 113 114 .text 115 .globl btext 116btext: 117 118/* 119 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 120 * mark the start of kernel text. 121 */ 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 li 8,0 133 li 9,0x100 134 mtctr 9 1351: 136 dcbf 0,8 137 icbi 0,8 138 addi 8,8,0x20 139 bdnz 1b 140 sync 141 isync 142 143 /* Save the argument pointer and length */ 144 mr 20,6 145 mr 21,7 146 147 lis 8,openfirmware_entry@ha 148 stw 5,openfirmware_entry@l(8) /* save client interface handler */ 149 150 lis 1,(tmpstk+TMPSTKSZ-16)@ha 151 addi 1,1,(tmpstk+TMPSTKSZ-16)@l 152 153 mfmsr 0 154 lis 9,ofmsr@ha 155 stwu 0,ofmsr@l(9) 156 157 mfsprg0 0 /* save SPRG0-3 */ 158 stw 0,4(9) /* ofmsr[1] = sprg0 */ 159 mfsprg1 0 160 stw 0,8(9) /* ofmsr[2] = sprg1 */ 161 mfsprg2 0 162 stw 0,12(9) /* ofmsr[3] = sprg2 */ 163 mfsprg3 0 164 stw 0,16(9) /* ofmsr[4] = sprg3 */ 165 166 bl OF_initial_setup 167 168 lis 4,end@ha 169 addi 4,4,end@l 170 mr 5,4 171 172 lis 3,kernel_text@ha 173 addi 3,3,kernel_text@l 174 175 /* Restore the argument pointer and length */ 176 mr 6,20 177 mr 7,21 178 179 bl powerpc_init 180 mr %r1, %r3 181 li %r3, 0 182 stw %r3, 0(%r1) 183 bl mi_startup 184 b OF_exit 185 186/* 187 * int setfault() 188 * 189 * Similar to setjmp to setup for handling faults on accesses to user memory. 190 * Any routine using this may only call bcopy, either the form below, 191 * or the (currently used) C code optimized, so it doesn't use any non-volatile 192 * registers. 193 */ 194 .globl setfault 195setfault: 196 mflr 0 197 mfcr 12 198 mfsprg 4,0 199 lwz 4,PC_CURTHREAD(4) 200 lwz 4,TD_PCB(4) 201 stw 3,PCB_ONFAULT(4) 202 stw 0,0(3) 203 stw 1,4(3) 204 stw 2,8(3) 205 stmw 12,12(3) 206 xor 3,3,3 207 blr 208 209#include <powerpc/aim/trap_subr.S> 210