1/* 2 * Copyright (C) 2003 Josef Baumgartner <josef.baumgartner@telex.de> 3 * Based on code from Bernhard Kuhn <bkuhn@metrowerks.com> 4 * 5 * See file CREDITS for list of people who contributed to this 6 * project. 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License as 10 * published by the Free Software Foundation; either version 2 of 11 * the License, or (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21 * MA 02111-1307 USA 22 */ 23 24#include <asm-offsets.h> 25#include <config.h> 26#include <timestamp.h> 27#include "version.h" 28#include <asm/cache.h> 29 30#ifndef CONFIG_IDENT_STRING 31#define CONFIG_IDENT_STRING "" 32#endif 33 34#define _START _start 35#define _FAULT _fault 36 37 38#define SAVE_ALL \ 39 move.w #0x2700,%sr; /* disable intrs */ \ 40 subl #60,%sp; /* space for 15 regs */ \ 41 moveml %d0-%d7/%a0-%a6,%sp@; \ 42 43#define RESTORE_ALL \ 44 moveml %sp@,%d0-%d7/%a0-%a6; \ 45 addl #60,%sp; /* space for 15 regs */ \ 46 rte 47 48/* If we come from a pre-loader we don't need an initial exception 49 * table. 50 */ 51#if !defined(CONFIG_MONITOR_IS_IN_RAM) 52 53.text 54/* 55 * Vector table. This is used for initial platform startup. 56 * These vectors are to catch any un-intended traps. 57 */ 58_vectors: 59 60.long 0x00000000 /* Flash offset is 0 until we setup CS0 */ 61#if defined(CONFIG_M5282) && (CONFIG_SYS_TEXT_BASE == CONFIG_SYS_INT_FLASH_BASE) 62.long _start - CONFIG_SYS_TEXT_BASE 63#else 64.long _START 65#endif 66 67.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 68.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 69.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 70.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 71.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 72.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 73.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 74.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 75 76.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 77.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 78.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 79.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 80.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 81.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 82.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 83.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 84 85.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 86.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 87.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 88.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 89.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 90.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 91.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 92.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 93 94.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 95.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 96.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 97.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 98.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 99.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 100.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 101.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 102 103#endif 104 105 .text 106 107 108#if defined(CONFIG_SYS_INT_FLASH_BASE) && \ 109 (defined(CONFIG_M5282) || defined(CONFIG_M5281)) 110 #if (CONFIG_SYS_TEXT_BASE == CONFIG_SYS_INT_FLASH_BASE) 111 .long 0x55AA55AA,0xAA55AA55 /* CFM Backdoorkey */ 112 .long 0xFFFFFFFF /* all sectors protected */ 113 .long 0x00000000 /* supervisor/User restriction */ 114 .long 0x00000000 /* programm/data space restriction */ 115 .long 0x00000000 /* Flash security */ 116 #endif 117#endif 118 .globl _start 119_start: 120 nop 121 nop 122 move.w #0x2700,%sr 123 124#if defined(CONFIG_M5208) 125 /* Initialize RAMBAR: locate SRAM and validate it */ 126 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0 127 movec %d0, %RAMBAR1 128#endif 129 130#if defined(CONFIG_M5272) || defined(CONFIG_M5249) || defined(CONFIG_M5253) 131 move.l #(CONFIG_SYS_MBAR + 1), %d0 /* set MBAR address + valid flag */ 132 move.c %d0, %MBAR 133 134 /*** The 5249 has MBAR2 as well ***/ 135#ifdef CONFIG_SYS_MBAR2 136 move.l #(CONFIG_SYS_MBAR2 + 1), %d0 /* Get MBAR2 address */ 137 movec %d0, #0xc0e /* Set MBAR2 */ 138#endif 139 140 move.l #(CONFIG_SYS_INIT_RAM_ADDR + 1), %d0 141 movec %d0, %RAMBAR0 142#endif /* CONFIG_M5272 || CONFIG_M5249 || CONFIG_M5253 */ 143 144#if defined(CONFIG_M5282) || defined(CONFIG_M5271) 145 /* Initialize IPSBAR */ 146 move.l #(CONFIG_SYS_MBAR + 1), %d0 /* set IPSBAR address + valid flag */ 147 move.l %d0, 0x40000000 148 149 /* Initialize RAMBAR1: locate SRAM and validate it */ 150 move.l #(CONFIG_SYS_INIT_RAM_ADDR + 0x21), %d0 151 movec %d0, %RAMBAR1 152 153#if defined(CONFIG_M5282) 154#if (CONFIG_SYS_TEXT_BASE == CONFIG_SYS_INT_FLASH_BASE) 155 /* Setup code in SRAM to initialize FLASHBAR, if start from internal Flash */ 156 157 move.l #(_flashbar_setup-CONFIG_SYS_INT_FLASH_BASE), %a0 158 move.l #(_flashbar_setup_end-CONFIG_SYS_INT_FLASH_BASE), %a1 159 move.l #(CONFIG_SYS_INIT_RAM_ADDR), %a2 160_copy_flash: 161 move.l (%a0)+, (%a2)+ 162 cmp.l %a0, %a1 163 bgt.s _copy_flash 164 jmp CONFIG_SYS_INIT_RAM_ADDR 165 166_flashbar_setup: 167 /* Initialize FLASHBAR: locate internal Flash and validate it */ 168 move.l #(CONFIG_SYS_INT_FLASH_BASE + CONFIG_SYS_INT_FLASH_ENABLE), %d0 169 movec %d0, %FLASHBAR 170 jmp _after_flashbar_copy.L /* Force jump to absolute address */ 171_flashbar_setup_end: 172 nop 173_after_flashbar_copy: 174#else 175 /* Setup code to initialize FLASHBAR, if start from external Memory */ 176 move.l #(CONFIG_SYS_INT_FLASH_BASE + CONFIG_SYS_INT_FLASH_ENABLE), %d0 177 movec %d0, %FLASHBAR 178#endif /* (CONFIG_SYS_TEXT_BASE == CONFIG_SYS_INT_FLASH_BASE) */ 179 180#endif 181#endif 182 /* if we come from a pre-loader we have no exception table and 183 * therefore no VBR to set 184 */ 185#if !defined(CONFIG_MONITOR_IS_IN_RAM) 186#if defined(CONFIG_M5282) && (CONFIG_SYS_TEXT_BASE == CONFIG_SYS_INT_FLASH_BASE) 187 move.l #CONFIG_SYS_INT_FLASH_BASE, %d0 188#else 189 move.l #CONFIG_SYS_FLASH_BASE, %d0 190#endif 191 movec %d0, %VBR 192#endif 193 194#ifdef CONFIG_M5275 195 /* Initialize IPSBAR */ 196 move.l #(CONFIG_SYS_MBAR + 1), %d0 /* set IPSBAR address + valid flag */ 197 move.l %d0, 0x40000000 198/* movec %d0, %MBAR */ 199 200 /* Initialize RAMBAR: locate SRAM and validate it */ 201 move.l #(CONFIG_SYS_INIT_RAM_ADDR + 0x21), %d0 202 movec %d0, %RAMBAR1 203#endif 204 205 /* initialize general use internal ram */ 206 move.l #0, %d0 207 move.l #(ICACHE_STATUS), %a1 /* icache */ 208 move.l #(DCACHE_STATUS), %a2 /* icache */ 209 move.l %d0, (%a1) 210 move.l %d0, (%a2) 211 212 /* set stackpointer to end of internal ram to get some stackspace for the first c-code */ 213 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp 214 clr.l %sp@- 215 216 move.l #__got_start, %a5 /* put relocation table address to a5 */ 217 218 bsr cpu_init_f /* run low-level CPU init code (from flash) */ 219 bsr board_init_f /* run low-level board init code (from flash) */ 220 221 /* board_init_f() does not return */ 222 223/*------------------------------------------------------------------------------*/ 224 225/* 226 * void relocate_code (addr_sp, gd, addr_moni) 227 * 228 * This "function" does not return, instead it continues in RAM 229 * after relocating the monitor code. 230 * 231 * r3 = dest 232 * r4 = src 233 * r5 = length in bytes 234 * r6 = cachelinesize 235 */ 236 .globl relocate_code 237relocate_code: 238 link.w %a6,#0 239 move.l 8(%a6), %sp /* set new stack pointer */ 240 241 move.l 12(%a6), %d0 /* Save copy of Global Data pointer */ 242 move.l 16(%a6), %a0 /* Save copy of Destination Address */ 243 244 move.l #CONFIG_SYS_MONITOR_BASE, %a1 245 move.l #__init_end, %a2 246 move.l %a0, %a3 247 /* copy the code to RAM */ 2481: 249 move.l (%a1)+, (%a3)+ 250 cmp.l %a1,%a2 251 bgt.s 1b 252 253/* 254 * We are done. Do not return, instead branch to second part of board 255 * initialization, now running from RAM. 256 */ 257 move.l %a0, %a1 258 add.l #(in_ram - CONFIG_SYS_MONITOR_BASE), %a1 259 jmp (%a1) 260 261in_ram: 262 263clear_bss: 264 /* 265 * Now clear BSS segment 266 */ 267 move.l %a0, %a1 268 add.l #(_sbss - CONFIG_SYS_MONITOR_BASE),%a1 269 move.l %a0, %d1 270 add.l #(_ebss - CONFIG_SYS_MONITOR_BASE),%d1 2716: 272 clr.l (%a1)+ 273 cmp.l %a1,%d1 274 bgt.s 6b 275 276 /* 277 * fix got table in RAM 278 */ 279 move.l %a0, %a1 280 add.l #(__got_start - CONFIG_SYS_MONITOR_BASE),%a1 281 move.l %a1,%a5 /* * fix got pointer register a5 */ 282 283 move.l %a0, %a2 284 add.l #(__got_end - CONFIG_SYS_MONITOR_BASE),%a2 285 2867: 287 move.l (%a1),%d1 288 sub.l #_start,%d1 289 add.l %a0,%d1 290 move.l %d1,(%a1)+ 291 cmp.l %a2, %a1 292 bne 7b 293 294 /* calculate relative jump to board_init_r in ram */ 295 move.l %a0, %a1 296 add.l #(board_init_r - CONFIG_SYS_MONITOR_BASE), %a1 297 298 /* set parameters for board_init_r */ 299 move.l %a0,-(%sp) /* dest_addr */ 300 move.l %d0,-(%sp) /* gd */ 301#if defined(DEBUG) && (CONFIG_SYS_TEXT_BASE != CONFIG_SYS_INT_FLASH_BASE) && \ 302 defined(CONFIG_SYS_HALT_BEFOR_RAM_JUMP) 303 halt 304#endif 305 jsr (%a1) 306 307/*------------------------------------------------------------------------------*/ 308/* exception code */ 309 .globl _fault 310_fault: 311 jmp _fault 312 313 .globl _exc_handler 314_exc_handler: 315 SAVE_ALL 316 movel %sp,%sp@- 317 bsr exc_handler 318 addql #4,%sp 319 RESTORE_ALL 320 321 .globl _int_handler 322_int_handler: 323 SAVE_ALL 324 movel %sp,%sp@- 325 bsr int_handler 326 addql #4,%sp 327 RESTORE_ALL 328 329/*------------------------------------------------------------------------------*/ 330 331 .globl version_string 332version_string: 333 .ascii U_BOOT_VERSION 334 .ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")" 335 .ascii CONFIG_IDENT_STRING, "\0" 336 .align 4 337