locore.S revision 1.3
1 /* $NetBSD: locore.S,v 1.3 2001/06/23 02:12:34 matt 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 #include <powerpc/spr.h> 52 53 /* 54 * Some instructions gas doesn't understand (yet?) 55 */ 56 #define bdneq bdnzf 2, 57 58 /* 59 * cache bit 60 */ 61 #define HID0_BTCD (1<<1) 62 #define HID0_BHTE (1<<2) 63 #define HID0_SIED (1<<7) 64 #define HID0_DCI (1<<10) 65 #define HID0_ICFI (1<<11) 66 #define HID0_DCE (1<<14) 67 #define HID0_ICE (1<<15) 68 69 #define INTSTK (8*1024) /* 8K interrupt stack */ 70 #define SPILLSTK 1024 /* 1K spill stack */ 71 72 /* 73 * Globals 74 */ 75 GLOBAL(startsym) 76 .long 0 /* start symbol table */ 77 GLOBAL(endsym) 78 .long 0 /* end symbol table */ 79 GLOBAL(proc0paddr) 80 .long 0 /* proc0 p_addr */ 81 82 GLOBAL(intrnames) 83 .asciz "clock", "irq1", "irq2", "irq3" 84 .asciz "irq4", "irq5", "irq6", "irq7" 85 .asciz "irq8", "irq9", "irq10", "irq11" 86 .asciz "irq12", "irq13", "irq14", "irq15" 87 .asciz "irq16", "irq17", "irq18", "irq19" 88 .asciz "irq20", "irq21", "irq22", "irq23" 89 .asciz "irq24", "irq25", "irq26", "irq27" 90 .asciz "irq28", "softnet", "softclock", "softserial" 91 GLOBAL(eintrnames) 92 .align 4 93 GLOBAL(intrcnt) 94 .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 95 .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 96 GLOBAL(eintrcnt) 97 98 /* 99 * File-scope for locore.S 100 */ 101 .data 102 idle_u: 103 .long 0 /* fake uarea during idle after exit */ 104 105 /* 106 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 107 * mark the start of kernel text. 108 */ 109 .text 110 .globl _C_LABEL(kernel_text) 111 _C_LABEL(kernel_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 0,0 121 mtmsr 0 /* Disable FPU/MMU/exceptions */ 122 isync 123 124 /* compute end of kernel memory */ 125 lis 8,_C_LABEL(end)@ha 126 addi 8,8,_C_LABEL(end)@l 127 #if defined(DDB) || defined(KERNFS) 128 lis 7,_C_LABEL(startsym)@ha 129 addi 7,7,_C_LABEL(startsym)@l 130 stw 3,0(7) 131 lis 7,_C_LABEL(endsym)@ha 132 addi 7,7,_C_LABEL(endsym)@l 133 stw 4,0(7) 134 mr 8,4 /* end of sysbol table */ 135 #endif 136 li 9,PGOFSET 137 add 8,8,9 138 andc 8,8,9 139 addi 8,8,NBPG 140 lis 9,idle_u@ha 141 stw 8,idle_u@l(9) 142 addi 8,8,USPACE /* space for idle_u */ 143 lis 9,_C_LABEL(proc0paddr)@ha 144 stw 8,_C_LABEL(proc0paddr)@l(9) 145 addi 1,8,USPACE-FRAMELEN /* stackpointer for proc0 */ 146 mr 4,1 /* end of mem reserved for kernel */ 147 xor 0,0,0 148 stwu 0,-16(1) /* end of stack chain */ 149 150 lis 3,__start@ha 151 addi 3,3,__start@l 152 153 bl _C_LABEL(initppc) 154 155 /* enable internal i/d-cache */ 156 mfpvr 9 157 rlwinm 9,9,16,16,31 158 cmpi 0,9,1 159 beq 3f /* not needed for 601 */ 160 mfspr 11,SPR_HID0 161 andi. 0,11,HID0_DCE 162 ori 11,11,HID0_ICE|HID0_DCE 163 ori 8,11,HID0_ICFI 164 bne 1f /* don't invalidate the D-cache */ 165 ori 8,8,HID0_DCI /* unless it wasn't enabled */ 166 1: 167 sync 168 mtspr SPR_HID0,8 /* enable and invalidate caches */ 169 sync 170 mtspr SPR_HID0,11 /* enable caches */ 171 sync 172 isync 173 cmpi 0,9,4 /* check for 604 */ 174 cmpi 1,9,9 /* or 604e */ 175 cmpi 2,9,10 /* or mach5 */ 176 cror 2,2,6 177 cror 2,2,10 178 bne 3f 179 ori 11,11,HID0_SIED|HID0_BHTE /* for 604[e], enable */ 180 bne 2,2f 181 ori 11,11,HID0_BTCD 182 2: 183 mtspr SPR_HID0,11 184 3: 185 sync 186 isync 187 188 bl _C_LABEL(main) 189 190 loop: 191 b loop /* not reached */ 192 193 .globl _C_LABEL(enable_intr) 194 _C_LABEL(enable_intr): 195 mfmsr 3 196 ori 3,3,PSL_EE@l 197 mtmsr 3 198 blr 199 200 .globl _C_LABEL(disable_intr) 201 _C_LABEL(disable_intr): 202 mfmsr 3 203 andi. 3,3,~PSL_EE@l 204 mtmsr 3 205 blr 206 207 /* 208 * Pull in common switch / setfault code. 209 */ 210 #include <powerpc/powerpc/locore_subr.S> 211 212 /* 213 * Pull in common trap vector code. 214 */ 215 #include <powerpc/powerpc/trap_subr.S> 216
Indexes created Fri Oct 03 02:09:57 GMT 2025