locore.S revision 1.7
1 /* $NetBSD: locore.S,v 1.7 2003/07/31 07:50:06 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 "opt_ppcparam.h" 41 #include "assym.h" 42 43 #include <sys/syscall.h> 44 45 #include <machine/param.h> 46 #include <machine/vmparam.h> 47 #include <machine/pmap.h> 48 #include <machine/psl.h> 49 #include <machine/trap.h> 50 #define _NOREGNAMES 51 #include <machine/asm.h> 52 53 #include <powerpc/spr.h> 54 55 #include "ksyms.h" 56 57 /* 58 * Some instructions gas doesn't understand (yet?) 59 */ 60 #define bdneq bdnzf 2, 61 62 /* 63 * cache bit 64 */ 65 #define HID0_BTCD (1<<1) 66 #define HID0_BHTE (1<<2) 67 #define HID0_SIED (1<<7) 68 #define HID0_DCI (1<<10) 69 #define HID0_ICFI (1<<11) 70 #define HID0_DCE (1<<14) 71 #define HID0_ICE (1<<15) 72 73 /* 74 * Globals 75 */ 76 GLOBAL(startsym) 77 .long 0 /* start symbol table */ 78 GLOBAL(endsym) 79 .long 0 /* end symbol table */ 80 GLOBAL(proc0paddr) 81 .long 0 /* proc0 p_addr */ 82 83 GLOBAL(intrnames) 84 .asciz "clock", "irq1", "irq2", "irq3" 85 .asciz "irq4", "irq5", "irq6", "irq7" 86 .asciz "irq8", "irq9", "irq10", "irq11" 87 .asciz "irq12", "irq13", "irq14", "irq15" 88 .asciz "irq16", "irq17", "irq18", "irq19" 89 .asciz "irq20", "irq21", "irq22", "irq23" 90 .asciz "irq24", "irq25", "irq26", "irq27" 91 .asciz "irq28", "softnet", "softclock", "softserial" 92 GLOBAL(eintrnames) 93 .align 4 94 GLOBAL(intrcnt) 95 .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 96 .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 97 GLOBAL(eintrcnt) 98 99 /* 100 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 101 * mark the start of kernel text. 102 */ 103 .text 104 .globl _C_LABEL(kernel_text) 105 _C_LABEL(kernel_text): 106 107 /* 108 * Startup entry. Note, this must be the first thing in the text 109 * segment! 110 */ 111 .text 112 .globl __start 113 __start: 114 li 0,0 115 mtmsr 0 /* Disable FPU/MMU/exceptions */ 116 isync 117 118 /* compute end of kernel memory */ 119 #if NKSYMS || defined(DDB) || defined(LKM) || defined(KERNFS) 120 lis 7,_C_LABEL(startsym)@ha 121 addi 7,7,_C_LABEL(startsym)@l 122 stw 3,0(7) 123 lis 7,_C_LABEL(endsym)@ha 124 addi 7,7,_C_LABEL(endsym)@l 125 stw 4,0(7) 126 #else 127 lis 4,_C_LABEL(end)@ha 128 addi 4,4,_C_LABEL(end)@l 129 #endif 130 131 INIT_CPUINFO(4,1,9,0) 132 133 lis 3,__start@ha 134 addi 3,3,__start@l 135 136 bl _C_LABEL(initppc) 137 138 /* enable internal i/d-cache */ 139 mfpvr 9 140 rlwinm 9,9,16,16,31 141 cmpi 0,9,1 142 beq 3f /* not needed for 601 */ 143 mfspr 11,SPR_HID0 144 andi. 0,11,HID0_DCE 145 ori 11,11,HID0_ICE|HID0_DCE 146 ori 8,11,HID0_ICFI 147 bne 1f /* don't invalidate the D-cache */ 148 ori 8,8,HID0_DCI /* unless it wasn't enabled */ 149 1: 150 sync 151 mtspr SPR_HID0,8 /* enable and invalidate caches */ 152 sync 153 mtspr SPR_HID0,11 /* enable caches */ 154 sync 155 isync 156 cmpi 0,9,4 /* check for 604 */ 157 cmpi 1,9,9 /* or 604e */ 158 cmpi 2,9,10 /* or mach5 */ 159 cror 2,2,6 160 cror 2,2,10 161 bne 3f 162 ori 11,11,HID0_SIED|HID0_BHTE /* for 604[e], enable */ 163 bne 2,2f 164 ori 11,11,HID0_BTCD 165 2: 166 mtspr SPR_HID0,11 167 3: 168 sync 169 isync 170 171 bl _C_LABEL(main) 172 173 loop: 174 b loop /* not reached */ 175 176 .globl _C_LABEL(enable_intr) 177 _C_LABEL(enable_intr): 178 mfmsr 3 179 ori 4,3,PSL_EE@l 180 mtmsr 4 181 blr 182 183 .globl _C_LABEL(disable_intr) 184 _C_LABEL(disable_intr): 185 mfmsr 3 186 andi. 4,3,~PSL_EE@l 187 mtmsr 4 188 blr 189 190 /* 191 * Pull in common switch / setfault code. 192 */ 193 #include <powerpc/powerpc/locore_subr.S> 194 195 /* 196 * Pull in common trap vector code. 197 */ 198 #include <powerpc/powerpc/trap_subr.S> 199 200 /* 201 * Pull in common pio / bus_space code. 202 */ 203 #include <powerpc/powerpc/pio_subr.S> 204
Indexes created Tue Oct 14 01:09:49 GMT 2025