locore.S revision 1.6
1 /* $NetBSD: locore.S,v 1.6 2003/04/27 10:42:52 ragge 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 #include <machine/asm.h> 51 52 #include <powerpc/spr.h> 53 54 #include "ksyms.h" 55 56 /* 57 * Some instructions gas doesn't understand (yet?) 58 */ 59 #define bdneq bdnzf 2, 60 61 /* 62 * cache bit 63 */ 64 #define HID0_BTCD (1<<1) 65 #define HID0_BHTE (1<<2) 66 #define HID0_SIED (1<<7) 67 #define HID0_DCI (1<<10) 68 #define HID0_ICFI (1<<11) 69 #define HID0_DCE (1<<14) 70 #define HID0_ICE (1<<15) 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 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 100 * mark the start of kernel text. 101 */ 102 .text 103 .globl _C_LABEL(kernel_text) 104 _C_LABEL(kernel_text): 105 106 /* 107 * Startup entry. Note, this must be the first thing in the text 108 * segment! 109 */ 110 .text 111 .globl __start 112 __start: 113 li 0,0 114 mtmsr 0 /* Disable FPU/MMU/exceptions */ 115 isync 116 117 /* compute end of kernel memory */ 118 #if NKSYMS || defined(DDB) || defined(LKM) || defined(KERNFS) 119 lis 7,_C_LABEL(startsym)@ha 120 addi 7,7,_C_LABEL(startsym)@l 121 stw 3,0(7) 122 lis 7,_C_LABEL(endsym)@ha 123 addi 7,7,_C_LABEL(endsym)@l 124 stw 4,0(7) 125 #else 126 lis 4,_C_LABEL(end)@ha 127 addi 4,4,_C_LABEL(end)@l 128 #endif 129 130 INIT_CPUINFO(4,1,9,0) 131 132 lis 3,__start@ha 133 addi 3,3,__start@l 134 135 bl _C_LABEL(initppc) 136 137 /* enable internal i/d-cache */ 138 mfpvr 9 139 rlwinm 9,9,16,16,31 140 cmpi 0,9,1 141 beq 3f /* not needed for 601 */ 142 mfspr 11,SPR_HID0 143 andi. 0,11,HID0_DCE 144 ori 11,11,HID0_ICE|HID0_DCE 145 ori 8,11,HID0_ICFI 146 bne 1f /* don't invalidate the D-cache */ 147 ori 8,8,HID0_DCI /* unless it wasn't enabled */ 148 1: 149 sync 150 mtspr SPR_HID0,8 /* enable and invalidate caches */ 151 sync 152 mtspr SPR_HID0,11 /* enable caches */ 153 sync 154 isync 155 cmpi 0,9,4 /* check for 604 */ 156 cmpi 1,9,9 /* or 604e */ 157 cmpi 2,9,10 /* or mach5 */ 158 cror 2,2,6 159 cror 2,2,10 160 bne 3f 161 ori 11,11,HID0_SIED|HID0_BHTE /* for 604[e], enable */ 162 bne 2,2f 163 ori 11,11,HID0_BTCD 164 2: 165 mtspr SPR_HID0,11 166 3: 167 sync 168 isync 169 170 bl _C_LABEL(main) 171 172 loop: 173 b loop /* not reached */ 174 175 .globl _C_LABEL(enable_intr) 176 _C_LABEL(enable_intr): 177 mfmsr 3 178 ori 4,3,PSL_EE@l 179 mtmsr 4 180 blr 181 182 .globl _C_LABEL(disable_intr) 183 _C_LABEL(disable_intr): 184 mfmsr 3 185 andi. 4,3,~PSL_EE@l 186 mtmsr 4 187 blr 188 189 /* 190 * Pull in common switch / setfault code. 191 */ 192 #include <powerpc/powerpc/locore_subr.S> 193 194 /* 195 * Pull in common trap vector code. 196 */ 197 #include <powerpc/powerpc/trap_subr.S> 198 199 /* 200 * Pull in common pio / bus_space code. 201 */ 202 #include <powerpc/powerpc/pio_subr.S> 203
Indexes created Tue Oct 07 21:09:53 GMT 2025