locore.S revision 1.15
1 /* $NetBSD: locore.S,v 1.15 2010/03/03 00:30:15 pooka 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 "opt_ipkdb.h" 37 #include "opt_lockdebug.h" 38 #include "opt_modular.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 #include <powerpc/oea/spr.h> 55 56 #include "ksyms.h" 57 58 /* 59 * Some instructions gas doesn't understand (yet?) 60 */ 61 #define bdneq bdnzf 2, 62 63 /* 64 * cache bit 65 */ 66 #define HID0_BTCD (1<<1) 67 #define HID0_BHTE (1<<2) 68 #define HID0_SIED (1<<7) 69 #define HID0_DCI (1<<10) 70 #define HID0_ICFI (1<<11) 71 #define HID0_DCE (1<<14) 72 #define HID0_ICE (1<<15) 73 74 /* 75 * Globals 76 */ 77 GLOBAL(startsym) 78 .long 0 /* start symbol table */ 79 GLOBAL(endsym) 80 .long 0 /* end symbol table */ 81 GLOBAL(oeacpufeat) 82 .long 0 /* cpu features */ 83 84 /* 85 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 86 * mark the start of kernel text. 87 */ 88 .text 89 .globl _C_LABEL(kernel_text) 90 _C_LABEL(kernel_text): 91 92 /* 93 * Startup entry. Note, this must be the first thing in the text 94 * segment! 95 */ 96 .text 97 .globl __start 98 __start: 99 li 0,0 100 mtmsr 0 /* Disable FPU/MMU/exceptions */ 101 isync 102 103 /* compute end of kernel memory */ 104 #if NKSYMS || defined(DDB) || defined(MODULAR) 105 lis 7,_C_LABEL(startsym)@ha 106 addi 7,7,_C_LABEL(startsym)@l 107 stw 3,0(7) 108 lis 7,_C_LABEL(endsym)@ha 109 addi 7,7,_C_LABEL(endsym)@l 110 stw 4,0(7) 111 #else 112 lis 4,_C_LABEL(end)@ha 113 addi 4,4,_C_LABEL(end)@l 114 #endif 115 116 INIT_CPUINFO(4,1,9,0) 117 118 lis 3,__start@ha 119 addi 3,3,__start@l 120 121 bl _C_LABEL(initppc) 122 123 /* enable internal i/d-cache */ 124 mfpvr 9 125 rlwinm 9,9,16,16,31 126 cmpi 0,9,1 127 beq 3f /* not needed for 601 */ 128 mfspr 11,SPR_HID0 129 andi. 0,11,HID0_DCE 130 ori 11,11,HID0_ICE|HID0_DCE 131 ori 8,11,HID0_ICFI 132 bne 1f /* don't invalidate the D-cache */ 133 ori 8,8,HID0_DCI /* unless it wasn't enabled */ 134 1: 135 sync 136 mtspr SPR_HID0,8 /* enable and invalidate caches */ 137 sync 138 mtspr SPR_HID0,11 /* enable caches */ 139 sync 140 isync 141 cmpi 0,9,4 /* check for 604 */ 142 cmpi 1,9,9 /* or 604e */ 143 cmpi 2,9,10 /* or mach5 */ 144 cror 2,2,6 145 cror 2,2,10 146 bne 3f 147 ori 11,11,HID0_SIED|HID0_BHTE /* for 604[e], enable */ 148 bne 2,2f 149 ori 11,11,HID0_BTCD 150 2: 151 mtspr SPR_HID0,11 152 3: 153 sync 154 isync 155 156 bl _C_LABEL(main) 157 158 loop: 159 b loop /* not reached */ 160 161 .globl _C_LABEL(enable_intr) 162 _C_LABEL(enable_intr): 163 mfmsr 3 164 ori 4,3,PSL_EE@l 165 mtmsr 4 166 blr 167 168 .globl _C_LABEL(disable_intr) 169 _C_LABEL(disable_intr): 170 mfmsr 3 171 andi. 4,3,~PSL_EE@l 172 mtmsr 4 173 blr 174 175 /* 176 * Pull in common switch / setfault code. 177 */ 178 #include <powerpc/powerpc/locore_subr.S> 179 180 /* 181 * Pull in common trap vector code. 182 */ 183 #include <powerpc/powerpc/trap_subr.S> 184 185 /* 186 * Pull in common pio / bus_space code. 187 */ 188 #include <powerpc/powerpc/pio_subr.S> 189
Indexes created Tue Oct 14 15:09:51 GMT 2025