locore.S revision 1.2
1 /* $NetBSD: locore.S,v 1.2 2001/06/17 16:01:28 nonaka Exp $ */ 2 /* $OpenBSD: locore.S,v 1.4 1997/01/26 09:06:38 rahnds Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 6 * Copyright (C) 1995, 1996 TooLs GmbH. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by TooLs GmbH. 20 * 4. The name of TooLs GmbH may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 28 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 29 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 31 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 32 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include "opt_ddb.h" 36 #include "fs_kernfs.h" 37 #include "opt_ipkdb.h" 38 #include "opt_lockdebug.h" 39 #include "opt_multiprocessor.h" 40 #include "assym.h" 41 42 #include <sys/syscall.h> 43 44 #include <machine/param.h> 45 #include <machine/vmparam.h> 46 #include <machine/pmap.h> 47 #include <machine/psl.h> 48 #include <machine/trap.h> 49 #include <machine/asm.h> 50 51 /* 52 * Some instructions gas doesn't understand (yet?) 53 */ 54 #define bdneq bdnzf 2, 55 56 /* 57 * cache bit 58 */ 59 #define HID0_BTCD (1<<1) 60 #define HID0_BHTE (1<<2) 61 #define HID0_SIED (1<<7) 62 #define HID0_DCI (1<<10) 63 #define HID0_ICFI (1<<11) 64 #define HID0_DCE (1<<14) 65 #define HID0_ICE (1<<15) 66 67 #define INTSTK (8*1024) /* 8K interrupt stack */ 68 #define SPILLSTK 1024 /* 1K spill stack */ 69 70 /* 71 * Globals 72 */ 73 GLOBAL(startsym) 74 .long 0 /* start symbol table */ 75 GLOBAL(endsym) 76 .long 0 /* end symbol table */ 77 GLOBAL(proc0paddr) 78 .long 0 /* proc0 p_addr */ 79 80 GLOBAL(intrnames) 81 .asciz "clock", "irq1", "irq2", "irq3" 82 .asciz "irq4", "irq5", "irq6", "irq7" 83 .asciz "irq8", "irq9", "irq10", "irq11" 84 .asciz "irq12", "irq13", "irq14", "irq15" 85 .asciz "irq16", "irq17", "irq18", "irq19" 86 .asciz "irq20", "irq21", "irq22", "irq23" 87 .asciz "irq24", "irq25", "irq26", "irq27" 88 .asciz "irq28", "softnet", "softclock", "softserial" 89 GLOBAL(eintrnames) 90 .align 4 91 GLOBAL(intrcnt) 92 .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 93 .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 94 GLOBAL(eintrcnt) 95 96 /* 97 * File-scope for locore.S 98 */ 99 .data 100 idle_u: 101 .long 0 /* fake uarea during idle after exit */ 102 103 /* 104 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 105 * mark the start of kernel text. 106 */ 107 .text 108 .globl _C_LABEL(kernel_text) 109 _C_LABEL(kernel_text): 110 111 /* 112 * Startup entry. Note, this must be the first thing in the text 113 * segment! 114 */ 115 .text 116 .globl __start 117 __start: 118 li 0,0 119 mtmsr 0 /* Disable FPU/MMU/exceptions */ 120 isync 121 122 /* compute end of kernel memory */ 123 lis 8,_C_LABEL(end)@ha 124 addi 8,8,_C_LABEL(end)@l 125 #if defined(DDB) || defined(KERNFS) 126 lis 7,_C_LABEL(startsym)@ha 127 addi 7,7,_C_LABEL(startsym)@l 128 stw 3,0(7) 129 lis 7,_C_LABEL(endsym)@ha 130 addi 7,7,_C_LABEL(endsym)@l 131 stw 4,0(7) 132 mr 8,4 /* end of sysbol table */ 133 #endif 134 li 9,PGOFSET 135 add 8,8,9 136 andc 8,8,9 137 addi 8,8,NBPG 138 lis 9,idle_u@ha 139 stw 8,idle_u@l(9) 140 addi 8,8,USPACE /* space for idle_u */ 141 lis 9,_C_LABEL(proc0paddr)@ha 142 stw 8,_C_LABEL(proc0paddr)@l(9) 143 addi 1,8,USPACE-FRAMELEN /* stackpointer for proc0 */ 144 mr 4,1 /* end of mem reserved for kernel */ 145 xor 0,0,0 146 stwu 0,-16(1) /* end of stack chain */ 147 148 lis 3,__start@ha 149 addi 3,3,__start@l 150 151 bl _C_LABEL(initppc) 152 153 /* enable internal i/d-cache */ 154 mfpvr 9 155 rlwinm 9,9,16,16,31 156 cmpi 0,9,1 157 beq 3f /* not needed for 601 */ 158 mfspr 11,1008 159 andi. 0,11,HID0_DCE 160 ori 11,11,HID0_ICE|HID0_DCE 161 ori 8,11,HID0_ICFI 162 bne 1f /* don't invalidate the D-cache */ 163 ori 8,8,HID0_DCI /* unless it wasn't enabled */ 164 1: 165 sync 166 mtspr 1008,8 /* enable and invalidate caches */ 167 sync 168 mtspr 1008,11 /* enable caches */ 169 sync 170 isync 171 cmpi 0,9,4 /* check for 604 */ 172 cmpi 1,9,9 /* or 604e */ 173 cmpi 2,9,10 /* or mach5 */ 174 cror 2,2,6 175 cror 2,2,10 176 bne 3f 177 ori 11,11,HID0_SIED|HID0_BHTE /* for 604[e], enable */ 178 bne 2,2f 179 ori 11,11,HID0_BTCD 180 2: 181 mtspr 1008,11 182 3: 183 sync 184 isync 185 186 bl _C_LABEL(main) 187 188 loop: 189 b loop /* not reached */ 190 191 .globl _C_LABEL(enable_intr) 192 _C_LABEL(enable_intr): 193 mfmsr 3 194 ori 3,3,PSL_EE@l 195 mtmsr 3 196 blr 197 198 .globl _C_LABEL(disable_intr) 199 _C_LABEL(disable_intr): 200 mfmsr 3 201 andi. 3,3,~PSL_EE@l 202 mtmsr 3 203 blr 204 205 /* 206 * Pull in common switch / setfault code. 207 */ 208 #include <powerpc/powerpc/locore_subr.S> 209 210 /* 211 * Pull in common trap vector code. 212 */ 213 #include <powerpc/powerpc/trap_subr.S> 214
Indexes created Fri Oct 03 02:09:57 GMT 2025