locore32.S revision 237737
1/* $FreeBSD: head/sys/powerpc/aim/locore32.S 237737 2012-06-29 01:55:20Z rpaulo $ */ 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 68/* Locate the per-CPU data structure */ 69#define GET_CPUINFO(r) \ 70 mfsprg0 r 71 72/* 73 * Compiled KERNBASE location and the kernel load address 74 */ 75 .globl kernbase 76 .set kernbase, KERNBASE 77 78#define TMPSTKSZ 8192 /* 8K temporary stack */ 79 80/* 81 * Globals 82 */ 83 .data 84 .align 4 85GLOBAL(tmpstk) 86 .space TMPSTKSZ 87GLOBAL(esym) 88 .long 0 /* end of symbol table */ 89 90#define INTRCNT_COUNT 256 /* max(HROWPIC_IRQMAX,OPENPIC_IRQMAX) */ 91GLOBAL(intrnames) 92 .space INTRCNT_COUNT * (MAXCOMLEN + 1) * 2 93GLOBAL(sintrnames) 94 .long INTRCNT_COUNT * (MAXCOMLEN + 1) * 2 95 96 .align 4 97GLOBAL(intrcnt) 98 .space INTRCNT_COUNT * 4 * 2 99GLOBAL(sintrcnt) 100 .long INTRCNT_COUNT * 4 * 2 101 102 .text 103 .globl btext 104btext: 105 106/* 107 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 108 * mark the start of kernel text. 109 */ 110 .globl kernel_text 111kernel_text: 112 113/* 114 * Startup entry. Note, this must be the first thing in the text 115 * segment! 116 */ 117 .text 118 .globl __start 119__start: 120 li 8,0 121 li 9,0x100 122 mtctr 9 1231: 124 dcbf 0,8 125 icbi 0,8 126 addi 8,8,0x20 127 bdnz 1b 128 sync 129 isync 130 131 /* Zero bss, in case we were started by something unhelpful */ 132 li 0,0 133 lis 8,_edata@ha 134 addi 8,8,_edata@l 135 lis 9,_end@ha 136 addi 9,9,_end@l 1372: stw 0,0(8) 138 addi 8,8,4 139 cmplw 8,9 140 blt 2b 141 142 /* Save the argument pointer and length */ 143 mr 20,6 144 mr 21,7 145 146 lis 8,openfirmware_entry@ha 147 stw 5,openfirmware_entry@l(8) /* save client interface handler */ 148 149 lis 1,(tmpstk+TMPSTKSZ-16)@ha 150 addi 1,1,(tmpstk+TMPSTKSZ-16)@l 151 152 mfmsr 0 153 lis 9,ofmsr@ha 154 stwu 0,ofmsr@l(9) 155 156 mfsprg0 0 /* save SPRG0-3 */ 157 stw 0,4(9) /* ofmsr[1] = sprg0 */ 158 mfsprg1 0 159 stw 0,8(9) /* ofmsr[2] = sprg1 */ 160 mfsprg2 0 161 stw 0,12(9) /* ofmsr[3] = sprg2 */ 162 mfsprg3 0 163 stw 0,16(9) /* ofmsr[4] = sprg3 */ 164 165 bl OF_initial_setup 166 167 lis 3,kernel_text@ha 168 addi 3,3,kernel_text@l 169 170 lis 4,end@ha 171 addi 4,4,end@l 172 add 4,4,3 173 mr 5,4 174 175 /* 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,TD_PCB(2) /* curthread = r2 */ 200 stw 3,PCB_ONFAULT(4) 201 stw 0,0(3) 202 stw 1,4(3) 203 stw 2,8(3) 204 stmw 12,12(3) 205 xor 3,3,3 206 blr 207 208#include <powerpc/aim/trap_subr32.S> 209