locore.S revision 1.11
1 /* $NetBSD: locore.S,v 1.11 2008/11/13 10:53:30 ad 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 GLOBAL(oeacpufeat) 83 .long 0 /* cpu features */ 84 85 /* 86 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 87 * mark the start of kernel text. 88 */ 89 .text 90 .globl _C_LABEL(kernel_text) 91 _C_LABEL(kernel_text): 92 93 /* 94 * Startup entry. Note, this must be the first thing in the text 95 * segment! 96 */ 97 .text 98 .globl __start 99 __start: 100 li 0,0 101 mtmsr 0 /* Disable FPU/MMU/exceptions */ 102 isync 103 104 /* compute end of kernel memory */ 105 #if NKSYMS || defined(DDB) || defined(MODULAR) || defined(KERNFS) 106 lis 7,_C_LABEL(startsym)@ha 107 addi 7,7,_C_LABEL(startsym)@l 108 stw 3,0(7) 109 lis 7,_C_LABEL(endsym)@ha 110 addi 7,7,_C_LABEL(endsym)@l 111 stw 4,0(7) 112 #else 113 lis 4,_C_LABEL(end)@ha 114 addi 4,4,_C_LABEL(end)@l 115 #endif 116 117 INIT_CPUINFO(4,1,9,0) 118 119 lis 3,__start@ha 120 addi 3,3,__start@l 121 122 bl _C_LABEL(initppc) 123 124 /* enable internal i/d-cache */ 125 mfpvr 9 126 rlwinm 9,9,16,16,31 127 cmpi 0,9,1 128 beq 3f /* not needed for 601 */ 129 mfspr 11,SPR_HID0 130 andi. 0,11,HID0_DCE 131 ori 11,11,HID0_ICE|HID0_DCE 132 ori 8,11,HID0_ICFI 133 bne 1f /* don't invalidate the D-cache */ 134 ori 8,8,HID0_DCI /* unless it wasn't enabled */ 135 1: 136 sync 137 mtspr SPR_HID0,8 /* enable and invalidate caches */ 138 sync 139 mtspr SPR_HID0,11 /* enable caches */ 140 sync 141 isync 142 cmpi 0,9,4 /* check for 604 */ 143 cmpi 1,9,9 /* or 604e */ 144 cmpi 2,9,10 /* or mach5 */ 145 cror 2,2,6 146 cror 2,2,10 147 bne 3f 148 ori 11,11,HID0_SIED|HID0_BHTE /* for 604[e], enable */ 149 bne 2,2f 150 ori 11,11,HID0_BTCD 151 2: 152 mtspr SPR_HID0,11 153 3: 154 sync 155 isync 156 157 bl _C_LABEL(main) 158 159 loop: 160 b loop /* not reached */ 161 162 .globl _C_LABEL(enable_intr) 163 _C_LABEL(enable_intr): 164 mfmsr 3 165 ori 4,3,PSL_EE@l 166 mtmsr 4 167 blr 168 169 .globl _C_LABEL(disable_intr) 170 _C_LABEL(disable_intr): 171 mfmsr 3 172 andi. 4,3,~PSL_EE@l 173 mtmsr 4 174 blr 175 176 /* 177 * Pull in common switch / setfault code. 178 */ 179 #include <powerpc/powerpc/locore_subr.S> 180 181 /* 182 * Pull in common trap vector code. 183 */ 184 #include <powerpc/powerpc/trap_subr.S> 185 186 /* 187 * Pull in common pio / bus_space code. 188 */ 189 #include <powerpc/powerpc/pio_subr.S> 190
Indexes created Sat Oct 11 19:10:01 GMT 2025