locore.S revision 1.6
1 /* $NetBSD: locore.S,v 1.6 2003/08/07 16:27:24 agc Exp $ */ 2 3 /*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)locore.s 7.3 (Berkeley) 5/13/91 35 */ 36 37 /*- 38 * Copyright (c) 1993, 1994, 1995, 1997 39 * Charles M. Hannum. All rights reserved. 40 * 41 * This code is derived from software contributed to Berkeley by 42 * William Jolitz. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 1. Redistributions of source code must retain the above copyright 48 * notice, this list of conditions and the following disclaimer. 49 * 2. Redistributions in binary form must reproduce the above copyright 50 * notice, this list of conditions and the following disclaimer in the 51 * documentation and/or other materials provided with the distribution. 52 * 3. All advertising materials mentioning features or use of this software 53 * must display the following acknowledgement: 54 * This product includes software developed by the University of 55 * California, Berkeley and its contributors. 56 * 4. Neither the name of the University nor the names of its contributors 57 * may be used to endorse or promote products derived from this software 58 * without specific prior written permission. 59 * 60 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 61 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 62 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 63 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 64 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 65 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 66 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 70 * SUCH DAMAGE. 71 * 72 * @(#)locore.s 7.3 (Berkeley) 5/13/91 73 */ 74 75 #include "opt_cputype.h" 76 #include "opt_memsize.h" 77 #include "assym.h" 78 79 #if defined(SH3) && defined(SH4) 80 #error "evbsh3 port don't support SH3,SH4 common kernel." 81 #endif 82 83 #include <sh3/asm.h> 84 #include <sh3/exception.h> 85 #include <sh3/locore.h> 86 #include <sh3/mmu_sh3.h> 87 #include <sh3/mmu_sh4.h> 88 #include <sh3/cache_sh3.h> 89 #include <sh3/cache_sh4.h> 90 91 #define INIT_STACK \ 92 ((IOM_RAM_BEGIN + IOM_RAM_SIZE - 0x00001000) | 0x80000000) 93 94 NENTRY(start) 95 /* Set SP to initial position */ 96 mov.l XLtmpstk, r15 97 98 /* Mask all interrupt */ 99 __INTR_MASK(r0, r1) 100 101 /* Set Register Bank to Bank 0 */ 102 mov.l SR_init, r0 103 ldc r0, sr 104 105 /* MMU off */ 106 xor r0, r0 107 MOV (MMUCR, r2) 108 mov.l r0, @r2 109 110 bra start1 111 nop 112 .align 2 113 SR_init: .long 0x500000F0 114 REG_SYMBOL(MMUCR) 115 start1: 116 117 #ifdef ROMIMAGE 118 /* Initialize BUS State Control Regs. */ 119 mov.l _ROM_START, r3 120 mov.l XL_ram_start, r4 121 mov.l @r4, r4 122 sub r3, r4 123 /* Set Bus State Controler */ 124 mov.l XLInitializeBsc, r0 125 sub r4, r0 126 jsr @r0 127 nop 128 129 /* Move kernel image from ROM area to RAM area */ 130 mov.l ___end, r0 131 mov.l ___start, r1 132 mov.l _KERNBASE, r2 133 sub r2, r0 134 sub r2, r1 135 sub r1, r0 136 add #4, r0 /* size of bytes to be copied */ 137 shlr2 r0 /* number of long word */ 138 mov.l _ROM_START, r3 139 add r3, r1 /* src address */ 140 mov.l ___start, r3 141 sub r2, r3 142 mov.l XL_ram_start, r4 143 mov.l @r4, r4 144 add r4, r3 /* dest address */ 145 1: 146 mov.l @r1+, r4 147 mov.l r4, @r3 148 add #4, r3 149 dt r0 /* decrement and Test */ 150 bf 1b 151 /* kernel image copy end */ 152 153 mov.l LXstart_in_RAM, r0 154 jmp @r0 /* jump to RAM area */ 155 nop 156 157 .align 2 158 LXstart_in_RAM: 159 .long start_in_RAM 160 XL_ram_start: 161 .long _C_LABEL(ram_start) 162 #else /* ROMIMAGE */ 163 #ifndef DONT_INIT_BSC 164 /* Set Bus State Controler */ 165 mov.l XLInitializeBsc, r0 166 jsr @r0 167 nop 168 #endif /* !DONT_INIT_BSC */ 169 #endif /* ROMIMAGE */ 170 171 start_in_RAM: 172 mova 1f, r0 173 mov r0, r4 174 mov.l XLinitSH3, r0 175 jsr @r0 /* call initSH3() */ 176 nop 177 178 .align 2 179 1: 180 181 #ifdef SH4 182 /* CCR must be accessed from P2 area */ 183 mova cache_on, r0 184 mov r0, r5 185 mov.l XLtoP2, r1 186 add r1, r5 187 mova main_label, r0 188 mov r0, r2 189 MOV (CCR, r3) 190 mov.l XL_CCRVAL, r4 191 jmp @r5 192 nop 193 194 .align 2 195 cache_on: 196 mov.l r4, @r3 /* Write to CCR */ 197 nop 198 nop 199 nop 200 nop 201 nop 202 nop 203 nop 204 nop 205 jmp @r2 206 nop 207 208 .align 2 209 main_label: 210 #endif /* SH4 */ 211 mov.l XLmain, r0 212 jsr @r0 /* call main() */ 213 nop 214 215 .align 2 216 217 #ifndef DONT_INIT_BSC 218 XLInitializeBsc:.long _C_LABEL(InitializeBsc) 219 #endif /* DONT_INIT_BSC */ 220 ___start: .long start 221 ___etext: .long _etext 222 ___end: .long _end 223 XLtmpstk: .long INIT_STACK 224 _KERNBASE: .long 0x8c000000 225 _ROM_START: .long IOM_ROM_BEGIN 226 XLinitSH3: .long _C_LABEL(initSH3) 227 XLmain: .long _C_LABEL(main) 228 XLtoP2: .long 0x20000000 229 REG_SYMBOL(CCR) 230 #ifdef SH4 231 XL_CCRVAL: .long 0x0909 /* Operand cache ON */ 232 #endif /* SH4 */ 233 234 load_and_reset: 235 mov.l XL_start_address, r0 236 mov r0, r8 237 mov.l @r4+, r1 /* r1 = osimage size */ 238 mov.l @r4+, r2 /* r2 = check sum */ 239 shlr2 r1 /* r1 = osimage size in dword */ 240 1: 241 mov.l @r4+, r3 242 mov.l r3, @r0 243 add #4, r0 244 dt r1 245 bf 1b 246 247 jmp @r8 /* jump to start address */ 248 nop 249 250 .align 2 251 XL_start_address: 252 .long IOM_RAM_BEGIN + 0x00010000 253 load_and_reset_end: 254 255 ENTRY(XLoadAndReset) 256 __INTR_MASK(r0, r1) 257 /* copy trampoline code to RAM area top */ 258 mov.l XL_load_and_reset, r0 259 mov.l XL_load_and_reset_end, r1 260 mov.l XL_load_trampoline_addr, r2 261 mov r2, r8 262 sub r0, r1 /* r1 = bytes to be copied */ 263 1: mov.b @r0+, r3 264 mov.b r3, @r2 265 add #1, r2 266 dt r1 267 bf 1b 268 269 jmp @r8 /* jump to trampoline code */ 270 nop 271 272 .align 2 273 XL_load_trampoline_addr: 274 .long IOM_RAM_BEGIN + 0x00008000 275 XL_load_and_reset: 276 .long load_and_reset 277 XL_load_and_reset_end: 278 .long load_and_reset_end 279 .data 280 .align 2 281 .globl _C_LABEL(intrcnt), _C_LABEL(eintrcnt) 282 .globl _C_LABEL(intrnames), _C_LABEL(eintrnames) 283 _C_LABEL(intrcnt): 284 _C_LABEL(eintrcnt): 285 _C_LABEL(intrnames): 286 _C_LABEL(eintrnames): 287
Indexes created Sat Oct 18 23:09:54 GMT 2025