1 /* $NetBSD: locore.S,v 1.30 2021/02/26 02:18:55 thorpej 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_lockdebug.h" 37 #include "opt_modular.h" 38 #include "opt_multiprocessor.h" 39 #include "opt_ppcparam.h" 40 #include "assym.h" 41 #include "ksyms.h" 42 43 #include <sys/syscall.h> 44 45 #include <machine/param.h> 46 #include <machine/psl.h> 47 #include <machine/trap.h> 48 #include <machine/asm.h> 49 50 #include <powerpc/spr.h> 51 #include <powerpc/oea/hid.h> 52 #include <powerpc/oea/spr.h> 53 54 /* 55 * Some instructions gas doesn't understand (yet?) 56 */ 57 #define bdneq bdnzf 2, 58 59 /* 60 * Globals 61 */ 62 GLOBAL(startsym) 63 .long 0 /* start symbol table */ 64 GLOBAL(endsym) 65 .long 0 /* end symbol table */ 66 67 /* XXX All of this should die */ 68 GLOBAL(intrnames) 69 .asciz "clock", "irq1", "irq2", "irq3" 70 .asciz "irq4", "irq5", "irq6", "irq7" 71 .asciz "irq8", "irq9", "irq10", "irq11" 72 .asciz "irq12", "irq13", "irq14", "irq15" 73 .asciz "irq16", "irq17", "irq18", "irq19" 74 .asciz "irq20", "irq21", "irq22", "irq23" 75 .asciz "irq24", "irq25", "irq26", "irq27" 76 .asciz "irq28", "softnet", "softclock", "softserial" 77 GLOBAL(eintrnames) 78 .align 4 79 GLOBAL(intrcnt) 80 .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 81 .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 82 GLOBAL(eintrcnt) 83 84 /* 85 * File-scope for locore.S 86 */ 87 .data 88 idle_u: 89 .long 0 /* fake uarea during idle after exit */ 90 91 /* 92 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 93 * mark the start of kernel text. 94 */ 95 .text 96 .globl _C_LABEL(kernel_text) 97 _C_LABEL(kernel_text): 98 99 /* 100 * Startup entry. Note, this must be the first thing in the text 101 * segment! 102 */ 103 .text 104 .globl __start 105 __start: 106 li 0,0 107 mtmsr 0 /* Disable FPU/MMU/exceptions */ 108 isync 109 110 /* 111 * CPU detect. 112 * 113 */ 114 lis 8, 0x7FFF 115 ori 8, 8, 0xF3F0 116 lwz 9, 0(8) /* read processor ID */ 117 andis. 9, 9, 0x0200 /* bit 6: */ 118 cmpwi 0, 9, 0 /* 0 if read by CPU 0, 1 if read by CPU 1 */ 119 bne __start_cpu1 120 b __start_cpu0 121 nop 122 123 __start_cpu1: 124 /* Disable data and instruction caches for spinup. */ 125 li 8,0 126 mtspr SPR_HID0,8 127 sync 128 isync 129 130 #ifdef MULTIPROCESSOR 131 li 3, 0x1 /* CPU ID 1 */ 132 ba cpu_spinstart /* cpu_spinstart(CPU ID) */ 133 #else 134 1: 135 b 1b 136 #endif 137 nop 138 139 __start_cpu0: 140 /* Enable data and instruction caches */ 141 mfspr 8,SPR_HID0 142 andi. 8,8,(HID0_ICE|HID0_DCE)@l 143 andi. 0,8,HID0_DCE 144 ori 7,8,HID0_ICFI 145 bne 1f 146 ori 7,7,HID0_DCFI 147 1: 148 sync 149 mtspr SPR_HID0,7 150 sync 151 mtspr SPR_HID0,8 152 sync 153 isync 154 155 /* compute end of kernel memory */ 156 #if defined(DDB) || NKSYMS || defined(MODULAR) 157 lis 7,_C_LABEL(startsym)@ha 158 addi 7,7,_C_LABEL(startsym)@l 159 stw 3,0(7) 160 lis 7,_C_LABEL(endsym)@ha 161 addi 7,7,_C_LABEL(endsym)@l 162 stw 4,0(7) /* end of symbol table */ 163 #else 164 lis 4,_C_LABEL(end)@ha 165 addi 4,4,_C_LABEL(end)@l 166 #endif 167 168 INIT_CPUINFO(4,1,9,0) 169 170 lis 3,__start@ha 171 addi 3,3,__start@l 172 173 bl _C_LABEL(initppc) 174 bl _C_LABEL(main) 175 176 loop: b loop /* XXX not reached */ 177 178 179 .globl _C_LABEL(cache_flush_invalidate_all) 180 _C_LABEL(cache_flush_invalidate_all): 181 mtctr 3 182 li 4,0x0 183 loop1: lwz 5,0(4) 184 addi 4,4,32 185 bdnz loop1 186 187 mtctr 3 188 li 4,0x0 189 loop2: dcbf 0,4 190 addi 4,4,32 191 bdnz loop2 192 193 blr 194 195 .globl _C_LABEL(debug_led) 196 _C_LABEL(debug_led): 197 lis 4, 0x8000 198 ori 4, 4, 0x0c00 199 stb 3, 0(4) 200 blr 201 /* 202 * Pull in common switch & setfault code. 203 */ 204 #include <powerpc/powerpc/locore_subr.S> 205 206 /* 207 * Pull in common trap vector code. 208 */ 209 #include <powerpc/powerpc/trap_subr.S> 210 211 /* 212 * Pull in common pio / bus_space code. 213 */ 214 #include <powerpc/powerpc/pio_subr.S> 215
Indexes created Fri Oct 03 14:09:59 GMT 2025