locore32.S revision 176617
1/* $FreeBSD: head/sys/powerpc/aim/locore.S 176617 2008-02-27 00:03:23Z marcel $ */ 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/* 81 * Globals 82 */ 83 .data 84GLOBAL(tmpstk) 85 .space 8208 86GLOBAL(esym) 87 .long 0 /* end of symbol table */ 88 89GLOBAL(ofmsr) 90 .long 0, 0, 0, 0, 0 /* msr/sprg0-3 used in Open Firmware */ 91 92GLOBAL(powersave) 93 .long 0 94 95#define INTSTK 16384 /* 16K interrupt stack */ 96#define INTRCNT_COUNT 256 /* max(HROWPIC_IRQMAX,OPENPIC_IRQMAX) */ 97GLOBAL(intrnames) 98 .space INTRCNT_COUNT * (MAXCOMLEN + 1) * 2 99GLOBAL(eintrnames) 100 .align 4 101GLOBAL(intrcnt) 102 .space INTRCNT_COUNT * 4 * 2 103GLOBAL(eintrcnt) 104 105/* 106 * File-scope for locore.S 107 */ 108idle_u: 109 .long 0 /* fake uarea during idle after exit */ 110openfirmware_entry: 111 .long 0 /* Open Firmware entry point */ 112srsave: 113 .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 114 115/* 116 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 117 * mark the start of kernel text. 118 */ 119 .text 120 .globl kernel_text 121kernel_text: 122 123/* 124 * Startup entry. Note, this must be the first thing in the text 125 * segment! 126 */ 127 .text 128 .globl __start 129__start: 130#ifdef FIRMWORKSBUGS 131 mfmsr 0 132 andi. 0,0,PSL_IR|PSL_DR 133 beq 1f 134 135 bl ofwr_init 1361: 137#endif 138 li 8,0 139 li 9,0x100 140 mtctr 9 1411: 142 dcbf 0,8 143 icbi 0,8 144 addi 8,8,0x20 145 bdnz 1b 146 sync 147 isync 148 149 /* Save the argument pointer and length */ 150 mr 20,6 151 mr 21,7 152 153 lis 8,openfirmware_entry@ha 154 stw 5,openfirmware_entry@l(8) /* save client interface handler */ 155 mr 3,5 156 157 lis 1,tmpstk@ha 158 addi 1,1,tmpstk@l 159 addi 1,1,8192 160 161 mfmsr 0 162 lis 9,ofmsr@ha 163 stwu 0,ofmsr@l(9) 164 165 mfsprg0 0 /* save SPRG0-3 */ 166 stw 0,4(9) /* ofmsr[1] = sprg0 */ 167 mfsprg1 0 168 stw 0,8(9) /* ofmsr[2] = sprg1 */ 169 mfsprg2 0 170 stw 0,12(9) /* ofmsr[3] = sprg2 */ 171 mfsprg3 0 172 stw 0,16(9) /* ofmsr[4] = sprg3 */ 173 174 bl OF_init 175 176 lis 4,end@ha 177 addi 4,4,end@l 178 mr 5,4 179 180 lis 3,kernel_text@ha 181 addi 3,3,kernel_text@l 182 183 /* Restore the argument pointer and length */ 184 mr 6,20 185 mr 7,21 186 187 bl powerpc_init 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,PC_CURTHREAD(4) 205 lwz 4,TD_PCB(4) 206 stw 3,PCB_ONFAULT(4) 207 stw 0,0(3) 208 stw 1,4(3) 209 stw 2,8(3) 210 stmw 12,12(3) 211 xor 3,3,3 212 blr 213 214#include <powerpc/aim/trap_subr.S> 215