Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/powerpc/powerpc/locore.S
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1 /* $FreeBSD: releng/7.4/sys/powerpc/powerpc/locore.S 151891 2005-10-30 21:29:59Z grehan $ */ 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 * Globals 76 */ 77 .data 78 GLOBAL(tmpstk) 79 .space 8208 80 GLOBAL(esym) 81 .long 0 /* end of symbol table */ 82 83 GLOBAL(ofmsr) 84 .long 0, 0, 0, 0, 0 /* msr/sprg0-3 used in Open Firmware */ 85 86 GLOBAL(powersave) 87 .long 0 88 89 #define INTSTK 16384 /* 16K interrupt stack */ 90 #define INTRCNT_COUNT 256 /* max(HROWPIC_IRQMAX,OPENPIC_IRQMAX) */ 91 GLOBAL(intrnames) 92 .space INTRCNT_COUNT * (MAXCOMLEN + 1) * 2 93 GLOBAL(eintrnames) 94 .align 4 95 GLOBAL(intrcnt) 96 .space INTRCNT_COUNT * 4 * 2 97 GLOBAL(eintrcnt) 98 99 /* 100 * File-scope for locore.S 101 */ 102 idle_u: 103 .long 0 /* fake uarea during idle after exit */ 104 openfirmware_entry: 105 .long 0 /* Open Firmware entry point */ 106 srsave: 107 .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 108 109 /* 110 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 111 * mark the start of kernel text. 112 */ 113 .text 114 .globl kernel_text 115 kernel_text: 116 117 /* 118 * Startup entry. Note, this must be the first thing in the text 119 * segment! 120 */ 121 .text 122 .globl __start 123 __start: 124 #ifdef FIRMWORKSBUGS 125 mfmsr 0 126 andi. 0,0,PSL_IR|PSL_DR 127 beq 1f 128 129 bl ofwr_init 130 1: 131 #endif 132 li 8,0 133 li 9,0x100 134 mtctr 9 135 1: 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 mr 3,5 150 151 lis 1,tmpstk@ha 152 addi 1,1,tmpstk@l 153 addi 1,1,8192 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_init 169 170 lis 4,end@ha 171 addi 4,4,end@l 172 mr 5,4 173 174 lis 3,kernel_text@ha 175 addi 3,3,kernel_text@l 176 177 /* Restore the argument pointer and length */ 178 mr 6,20 179 mr 7,21 180 181 bl powerpc_init 182 bl mi_startup 183 b OF_exit 184 185 /* 186 * int setfault() 187 * 188 * Similar to setjmp to setup for handling faults on accesses to user memory. 189 * Any routine using this may only call bcopy, either the form below, 190 * or the (currently used) C code optimized, so it doesn't use any non-volatile 191 * registers. 192 */ 193 .globl setfault 194 setfault: 195 mflr 0 196 mfcr 12 197 mfsprg 4,0 198 lwz 4,PC_CURTHREAD(4) 199 lwz 4,TD_PCB(4) 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/powerpc/trap_subr.S>
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