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/* 80 * Globals 81 */ 82 .data 83 .align 3 84GLOBAL(__startkernel) 85 .long begin 86GLOBAL(__endkernel) 87 .long end 88 .align 4 89#define TMPSTKSZ 8192 /* 8K temporary stack */ 90GLOBAL(tmpstk) 91 .space TMPSTKSZ 92 93 .text 94 .globl btext 95btext: 96 97/* 98 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 99 * mark the start of kernel text. 100 */ 101 .globl kernel_text 102kernel_text: 103 104/* 105 * Startup entry. Note, this must be the first thing in the text 106 * segment! 107 */ 108 .text 109 .globl __start 110__start: 111 /* Figure out where we are */ 112 bl 1f 113 .long _DYNAMIC-. 114 .long _GLOBAL_OFFSET_TABLE_-. 115 .long tmpstk-. 1161: mflr %r30 117 118 /* Set up temporary stack pointer */ 119 lwz %r1,8(%r30) 120 add %r1,%r1,%r30 121 addi %r1,%r1,(8+TMPSTKSZ-32) 122 123 /* Relocate self */ 124 stw %r3,16(%r1) 125 stw %r4,20(%r1) 126 stw %r5,24(%r1) 127 stw %r6,28(%r1) 128 129 lwz %r3,0(%r30) /* _DYNAMIC in %r3 */ 130 add %r3,%r3,%r30 131 lwz %r4,4(%r30) /* GOT pointer */ 132 add %r4,%r4,%r30 133 lwz %r4,4(%r4) /* got[0] is _DYNAMIC link addr */ 134 subf %r4,%r4,%r3 /* subtract to calculate relocbase */ 135 bl elf_reloc_self 136 137 lwz %r3,16(%r1) 138 lwz %r4,20(%r1) 139 lwz %r5,24(%r1) 140 lwz %r6,28(%r1) 141 142 /* MD setup */ 143 bl powerpc_init 144 145 /* Set stack pointer to new value and branch to mi_startup */ 146 mr %r1, %r3 147 li %r3, 0 148 stw %r3, 0(%r1) 149 bl mi_startup 150 151 /* If mi_startup somehow returns, exit. This would be bad. */ 152 b OF_exit 153 154/* 155 * int setfault() 156 * 157 * Similar to setjmp to setup for handling faults on accesses to user memory. 158 * Any routine using this may only call bcopy, either the form below, 159 * or the (currently used) C code optimized, so it doesn't use any non-volatile 160 * registers. 161 */ 162 .globl setfault 163setfault: 164 mflr 0 165 mfcr 12 166 mfsprg 4,0 167 lwz 4,TD_PCB(2) /* curthread = r2 */ 168 stw 3,PCB_ONFAULT(4) 169 stw 0,0(3) 170 stw 1,4(3) 171 stw 2,8(3) 172 stmw 12,12(3) 173 xor 3,3,3 174 blr 175 176#include <powerpc/aim/trap_subr32.S> 177