projects / J-u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 47d1a6e1 WD |
1 | /* |
| 2 | * Copyright (C) 1998 Dan Malek <[email protected]> | |
| 3 | * Copyright (C) 1999 Magnus Damm <kieraypc01.p.y.kie.era.ericsson.se> | |
| 4 | * Copyright (C) 2000,2001,2002 Wolfgang Denk <[email protected]> | |
| 5 | * Copyright (C) 2001 Josh Huber <[email protected]> | |
| 6 | * | |
| 7 | * See file CREDITS for list of people who contributed to this | |
| 8 | * project. | |
| 9 | * | |
| 10 | * This program is free software; you can redistribute it and/or | |
| 11 | * modify it under the terms of the GNU General Public License as | |
| 12 | * published by the Free Software Foundation; either version 2 of | |
| 13 | * the License, or (at your option) any later version. | |
| 14 | * | |
| 15 | * This program is distributed in the hope that it will be useful, | |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 18 | * GNU General Public License for more details. | |
| 19 | * | |
| 20 | * You should have received a copy of the GNU General Public License | |
| 21 | * along with this program; if not, write to the Free Software | |
| 22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
| 23 | * MA 02111-1307 USA | |
| 24 | */ | |
| 25 | ||
| 26 | /* U-Boot - Startup Code for PowerPC based Embedded Boards | |
| 27 | * | |
| 28 | * | |
| 29 | * The processor starts at 0xfff00100 and the code is executed | |
| 30 | * from flash. The code is organized to be at an other address | |
| 31 | * in memory, but as long we don't jump around before relocating. | |
| 32 | * board_init lies at a quite high address and when the cpu has | |
| 33 | * jumped there, everything is ok. | |
| 34 | */ | |
| 35 | #include <config.h> | |
| 36 | #include <74xx_7xx.h> | |
| 37 | #include <version.h> | |
| 38 | ||
| 39 | #include <ppc_asm.tmpl> | |
| 40 | #include <ppc_defs.h> | |
| 41 | ||
| 42 | #include <asm/cache.h> | |
| 43 | #include <asm/mmu.h> | |
| 44 | ||
| 3a473b2a WD |
45 | #if !defined(CONFIG_DB64360) && \ |
| 46 | !defined(CONFIG_DB64460) | |
| 47d1a6e1 | 47 | #include <galileo/gt64260R.h> |
| 3a473b2a | 48 | #endif |
| 47d1a6e1 WD |
49 | |
| 50 | #ifndef CONFIG_IDENT_STRING | |
| 51 | #define CONFIG_IDENT_STRING "" | |
| 52 | #endif | |
| 53 | ||
| 54 | /* We don't want the MMU yet. | |
| 55 | */ | |
| 56 | #undef MSR_KERNEL | |
| 57 | /* Machine Check and Recoverable Interr. */ | |
| 58 | #define MSR_KERNEL ( MSR_ME | MSR_RI ) | |
| 59 | ||
| 60 | /* | |
| 61 | * Set up GOT: Global Offset Table | |
| 62 | * | |
| 63 | * Use r14 to access the GOT | |
| 64 | */ | |
| 65 | START_GOT | |
| 66 | GOT_ENTRY(_GOT2_TABLE_) | |
| 67 | GOT_ENTRY(_FIXUP_TABLE_) | |
| 68 | ||
| 69 | GOT_ENTRY(_start) | |
| 70 | GOT_ENTRY(_start_of_vectors) | |
| 71 | GOT_ENTRY(_end_of_vectors) | |
| 72 | GOT_ENTRY(transfer_to_handler) | |
| 73 | ||
| 3b57fe0a | 74 | GOT_ENTRY(__init_end) |
| 47d1a6e1 | 75 | GOT_ENTRY(_end) |
| 5d232d0e | 76 | GOT_ENTRY(__bss_start) |
| 47d1a6e1 WD |
77 | END_GOT |
| 78 | ||
| 79 | /* | |
| 80 | * r3 - 1st arg to board_init(): IMMP pointer | |
| 81 | * r4 - 2nd arg to board_init(): boot flag | |
| 82 | */ | |
| 83 | .text | |
| 84 | .long 0x27051956 /* U-Boot Magic Number */ | |
| 85 | .globl version_string | |
| 86 | version_string: | |
| 87 | .ascii U_BOOT_VERSION | |
| 88 | .ascii " (", __DATE__, " - ", __TIME__, ")" | |
| 89 | .ascii CONFIG_IDENT_STRING, "\0" | |
| 90 | ||
| 91 | . = EXC_OFF_SYS_RESET | |
| 92 | .globl _start | |
| 93 | _start: | |
| 94 | li r21, BOOTFLAG_COLD /* Normal Power-On: Boot from FLASH */ | |
| 95 | b boot_cold | |
| 96 | sync | |
| 97 | ||
| 98 | . = EXC_OFF_SYS_RESET + 0x10 | |
| 99 | ||
| 100 | .globl _start_warm | |
| 101 | _start_warm: | |
| 102 | li r21, BOOTFLAG_WARM /* Software reboot */ | |
| 103 | b boot_warm | |
| 104 | sync | |
| 105 | ||
| 106 | /* the boot code is located below the exception table */ | |
| 107 | ||
| 108 | .globl _start_of_vectors | |
| 109 | _start_of_vectors: | |
| 110 | ||
| 111 | /* Machine check */ | |
| 112 | STD_EXCEPTION(0x200, MachineCheck, MachineCheckException) | |
| 113 | ||
| 114 | /* Data Storage exception. "Never" generated on the 860. */ | |
| 115 | STD_EXCEPTION(0x300, DataStorage, UnknownException) | |
| 116 | ||
| 117 | /* Instruction Storage exception. "Never" generated on the 860. */ | |
| 118 | STD_EXCEPTION(0x400, InstStorage, UnknownException) | |
| 119 | ||
| 120 | /* External Interrupt exception. */ | |
| 121 | STD_EXCEPTION(0x500, ExtInterrupt, external_interrupt) | |
| 122 | ||
| 123 | /* Alignment exception. */ | |
| 124 | . = 0x600 | |
| 125 | Alignment: | |
| 126 | EXCEPTION_PROLOG | |
| 127 | mfspr r4,DAR | |
| 128 | stw r4,_DAR(r21) | |
| 129 | mfspr r5,DSISR | |
| 130 | stw r5,_DSISR(r21) | |
| 131 | addi r3,r1,STACK_FRAME_OVERHEAD | |
| 132 | li r20,MSR_KERNEL | |
| 133 | rlwimi r20,r23,0,16,16 /* copy EE bit from saved MSR */ | |
| 134 | lwz r6,GOT(transfer_to_handler) | |
| 135 | mtlr r6 | |
| 136 | blrl | |
| 137 | .L_Alignment: | |
| 138 | .long AlignmentException - _start + EXC_OFF_SYS_RESET | |
| 139 | .long int_return - _start + EXC_OFF_SYS_RESET | |
| 140 | ||
| 141 | /* Program check exception */ | |
| 142 | . = 0x700 | |
| 143 | ProgramCheck: | |
| 144 | EXCEPTION_PROLOG | |
| 145 | addi r3,r1,STACK_FRAME_OVERHEAD | |
| 146 | li r20,MSR_KERNEL | |
| 147 | rlwimi r20,r23,0,16,16 /* copy EE bit from saved MSR */ | |
| 148 | lwz r6,GOT(transfer_to_handler) | |
| 149 | mtlr r6 | |
| 150 | blrl | |
| 151 | .L_ProgramCheck: | |
| 152 | .long ProgramCheckException - _start + EXC_OFF_SYS_RESET | |
| 153 | .long int_return - _start + EXC_OFF_SYS_RESET | |
| 154 | ||
| 155 | /* No FPU on MPC8xx. This exception is not supposed to happen. | |
| 156 | */ | |
| 157 | STD_EXCEPTION(0x800, FPUnavailable, UnknownException) | |
| 158 | ||
| 159 | /* I guess we could implement decrementer, and may have | |
| 160 | * to someday for timekeeping. | |
| 161 | */ | |
| 162 | STD_EXCEPTION(0x900, Decrementer, timer_interrupt) | |
| 163 | STD_EXCEPTION(0xa00, Trap_0a, UnknownException) | |
| 164 | STD_EXCEPTION(0xb00, Trap_0b, UnknownException) | |
| 27b207fd | 165 | STD_EXCEPTION(0xc00, SystemCall, UnknownException) |
| 47d1a6e1 WD |
166 | STD_EXCEPTION(0xd00, SingleStep, UnknownException) |
| 167 | ||
| 168 | STD_EXCEPTION(0xe00, Trap_0e, UnknownException) | |
| 169 | STD_EXCEPTION(0xf00, Trap_0f, UnknownException) | |
| 170 | ||
| 8bde7f77 WD |
171 | /* |
| 172 | * On the MPC8xx, this is a software emulation interrupt. It | |
| 173 | * occurs for all unimplemented and illegal instructions. | |
| 47d1a6e1 WD |
174 | */ |
| 175 | STD_EXCEPTION(0x1000, SoftEmu, SoftEmuException) | |
| 176 | ||
| 177 | STD_EXCEPTION(0x1100, InstructionTLBMiss, UnknownException) | |
| 178 | STD_EXCEPTION(0x1200, DataTLBMiss, UnknownException) | |
| 179 | STD_EXCEPTION(0x1300, InstructionTLBError, UnknownException) | |
| 180 | STD_EXCEPTION(0x1400, DataTLBError, UnknownException) | |
| 181 | ||
| 182 | STD_EXCEPTION(0x1500, Reserved5, UnknownException) | |
| 183 | STD_EXCEPTION(0x1600, Reserved6, UnknownException) | |
| 184 | STD_EXCEPTION(0x1700, Reserved7, UnknownException) | |
| 185 | STD_EXCEPTION(0x1800, Reserved8, UnknownException) | |
| 186 | STD_EXCEPTION(0x1900, Reserved9, UnknownException) | |
| 187 | STD_EXCEPTION(0x1a00, ReservedA, UnknownException) | |
| 188 | STD_EXCEPTION(0x1b00, ReservedB, UnknownException) | |
| 189 | ||
| 190 | STD_EXCEPTION(0x1c00, DataBreakpoint, UnknownException) | |
| 191 | STD_EXCEPTION(0x1d00, InstructionBreakpoint, UnknownException) | |
| 192 | STD_EXCEPTION(0x1e00, PeripheralBreakpoint, UnknownException) | |
| 193 | STD_EXCEPTION(0x1f00, DevPortBreakpoint, UnknownException) | |
| 194 | ||
| 195 | .globl _end_of_vectors | |
| 196 | _end_of_vectors: | |
| 197 | ||
| 198 | . = 0x2000 | |
| 199 | ||
| 200 | boot_cold: | |
| 201 | boot_warm: | |
| 202 | /* disable everything */ | |
| 203 | li r0, 0 | |
| 204 | mtspr HID0, r0 | |
| 205 | sync | |
| 206 | mtmsr 0 | |
| 207 | bl invalidate_bats | |
| 208 | sync | |
| 209 | ||
| 210 | #ifdef CFG_L2 | |
| 211 | /* init the L2 cache */ | |
| 212 | addis r3, r0, L2_INIT@h | |
| 213 | ori r3, r3, L2_INIT@l | |
| 214 | sync | |
| 215 | mtspr l2cr, r3 | |
| 216 | #endif | |
| 217 | #if defined(CONFIG_ALTIVEC) && defined(CONFIG_74xx) | |
| 218 | .long 0x7e00066c | |
| 219 | /* | |
| 8bde7f77 WD |
220 | * dssall instruction, gas doesn't have it yet |
| 221 | * ...for altivec, data stream stop all this probably | |
| 222 | * isn't needed unless we warm (software) reboot U-Boot | |
| 47d1a6e1 WD |
223 | */ |
| 224 | #endif | |
| 225 | ||
| 226 | #ifdef CFG_L2 | |
| 227 | /* invalidate the L2 cache */ | |
| 228 | bl l2cache_invalidate | |
| 229 | sync | |
| 230 | #endif | |
| 231 | #ifdef CFG_BOARD_ASM_INIT | |
| 232 | /* do early init */ | |
| 233 | bl board_asm_init | |
| 234 | #endif | |
| 235 | ||
| 236 | /* | |
| 237 | * Calculate absolute address in FLASH and jump there | |
| 238 | *------------------------------------------------------*/ | |
| 239 | lis r3, CFG_MONITOR_BASE@h | |
| 240 | ori r3, r3, CFG_MONITOR_BASE@l | |
| 241 | addi r3, r3, in_flash - _start + EXC_OFF_SYS_RESET | |
| 242 | mtlr r3 | |
| 243 | blr | |
| 244 | ||
| 245 | in_flash: | |
| 246 | /* let the C-code set up the rest */ | |
| 247 | /* */ | |
| 248 | /* Be careful to keep code relocatable ! */ | |
| 249 | /*------------------------------------------------------*/ | |
| 250 | ||
| 251 | /* perform low-level init */ | |
| 252 | /* sdram init, galileo init, etc */ | |
| 253 | /* r3: NHR bit from HID0 */ | |
| 254 | ||
| 255 | /* setup the bats */ | |
| 256 | bl setup_bats | |
| 257 | sync | |
| 258 | ||
| 259 | /* | |
| 260 | * Cache must be enabled here for stack-in-cache trick. | |
| 261 | * This means we need to enable the BATS. | |
| 262 | * This means: | |
| 8bde7f77 | 263 | * 1) for the EVB, original gt regs need to be mapped |
| 47d1a6e1 WD |
264 | * 2) need to have an IBAT for the 0xf region, |
| 265 | * we are running there! | |
| 8bde7f77 WD |
266 | * Cache should be turned on after BATs, since by default |
| 267 | * everything is write-through. | |
| 268 | * The init-mem BAT can be reused after reloc. The old | |
| 269 | * gt-regs BAT can be reused after board_init_f calls | |
| 270 | * board_pre_init (EVB only). | |
| 271 | */ | |
| 47d1a6e1 WD |
272 | #if !defined(CONFIG_BAB7xx) && !defined(CONFIG_ELPPC) |
| 273 | /* enable address translation */ | |
| 274 | bl enable_addr_trans | |
| 275 | sync | |
| 276 | ||
| 277 | /* enable and invalidate the data cache */ | |
| 278 | bl l1dcache_enable | |
| 279 | sync | |
| 280 | #endif | |
| 281 | #ifdef CFG_INIT_RAM_LOCK | |
| 282 | bl lock_ram_in_cache | |
| 283 | sync | |
| 284 | #endif | |
| 285 | ||
| 286 | /* set up the stack pointer in our newly created | |
| 287 | * cache-ram (r1) */ | |
| 288 | lis r1, (CFG_INIT_RAM_ADDR + CFG_GBL_DATA_OFFSET)@h | |
| 289 | ori r1, r1, (CFG_INIT_RAM_ADDR + CFG_GBL_DATA_OFFSET)@l | |
| 290 | ||
| 291 | li r0, 0 /* Make room for stack frame header and */ | |
| 292 | stwu r0, -4(r1) /* clear final stack frame so that */ | |
| 293 | stwu r0, -4(r1) /* stack backtraces terminate cleanly */ | |
| 294 | ||
| 295 | GET_GOT /* initialize GOT access */ | |
| 296 | ||
| 297 | /* run low-level CPU init code (from Flash) */ | |
| 298 | bl cpu_init_f | |
| 299 | sync | |
| 300 | ||
| 301 | mr r3, r21 | |
| 302 | ||
| 303 | /* r3: BOOTFLAG */ | |
| 304 | /* run 1st part of board init code (from Flash) */ | |
| 305 | bl board_init_f | |
| 306 | sync | |
| 307 | ||
| 308 | /* NOTREACHED */ | |
| 309 | ||
| 310 | .globl invalidate_bats | |
| 311 | invalidate_bats: | |
| 312 | /* invalidate BATs */ | |
| 313 | mtspr IBAT0U, r0 | |
| 314 | mtspr IBAT1U, r0 | |
| 315 | mtspr IBAT2U, r0 | |
| 316 | mtspr IBAT3U, r0 | |
| 72755c71 WD |
317 | #ifdef CONFIG_750FX |
| 318 | mtspr IBAT4U, r0 | |
| 319 | mtspr IBAT5U, r0 | |
| 320 | mtspr IBAT6U, r0 | |
| 321 | mtspr IBAT7U, r0 | |
| 322 | #endif | |
| 47d1a6e1 WD |
323 | isync |
| 324 | mtspr DBAT0U, r0 | |
| 325 | mtspr DBAT1U, r0 | |
| 326 | mtspr DBAT2U, r0 | |
| 327 | mtspr DBAT3U, r0 | |
| 72755c71 | 328 | #ifdef CONFIG_750FX |
| 8bde7f77 WD |
329 | mtspr DBAT4U, r0 |
| 330 | mtspr DBAT5U, r0 | |
| 331 | mtspr DBAT6U, r0 | |
| 332 | mtspr DBAT7U, r0 | |
| 72755c71 | 333 | #endif |
| 47d1a6e1 WD |
334 | isync |
| 335 | sync | |
| 336 | blr | |
| 337 | ||
| 338 | /* setup_bats - set them up to some initial state */ | |
| 339 | .globl setup_bats | |
| 340 | setup_bats: | |
| 341 | addis r0, r0, 0x0000 | |
| 342 | ||
| 343 | /* IBAT 0 */ | |
| 344 | addis r4, r0, CFG_IBAT0L@h | |
| 345 | ori r4, r4, CFG_IBAT0L@l | |
| 346 | addis r3, r0, CFG_IBAT0U@h | |
| 347 | ori r3, r3, CFG_IBAT0U@l | |
| 348 | mtspr IBAT0L, r4 | |
| 349 | mtspr IBAT0U, r3 | |
| 350 | isync | |
| 351 | ||
| 352 | /* DBAT 0 */ | |
| 353 | addis r4, r0, CFG_DBAT0L@h | |
| 354 | ori r4, r4, CFG_DBAT0L@l | |
| 355 | addis r3, r0, CFG_DBAT0U@h | |
| 356 | ori r3, r3, CFG_DBAT0U@l | |
| 357 | mtspr DBAT0L, r4 | |
| 358 | mtspr DBAT0U, r3 | |
| 359 | isync | |
| 360 | ||
| 361 | /* IBAT 1 */ | |
| 362 | addis r4, r0, CFG_IBAT1L@h | |
| 363 | ori r4, r4, CFG_IBAT1L@l | |
| 364 | addis r3, r0, CFG_IBAT1U@h | |
| 365 | ori r3, r3, CFG_IBAT1U@l | |
| 366 | mtspr IBAT1L, r4 | |
| 367 | mtspr IBAT1U, r3 | |
| 368 | isync | |
| 369 | ||
| 370 | /* DBAT 1 */ | |
| 371 | addis r4, r0, CFG_DBAT1L@h | |
| 372 | ori r4, r4, CFG_DBAT1L@l | |
| 373 | addis r3, r0, CFG_DBAT1U@h | |
| 374 | ori r3, r3, CFG_DBAT1U@l | |
| 375 | mtspr DBAT1L, r4 | |
| 376 | mtspr DBAT1U, r3 | |
| 377 | isync | |
| 378 | ||
| 379 | /* IBAT 2 */ | |
| 380 | addis r4, r0, CFG_IBAT2L@h | |
| 381 | ori r4, r4, CFG_IBAT2L@l | |
| 382 | addis r3, r0, CFG_IBAT2U@h | |
| 383 | ori r3, r3, CFG_IBAT2U@l | |
| 384 | mtspr IBAT2L, r4 | |
| 385 | mtspr IBAT2U, r3 | |
| 386 | isync | |
| 387 | ||
| 388 | /* DBAT 2 */ | |
| 389 | addis r4, r0, CFG_DBAT2L@h | |
| 390 | ori r4, r4, CFG_DBAT2L@l | |
| 391 | addis r3, r0, CFG_DBAT2U@h | |
| 392 | ori r3, r3, CFG_DBAT2U@l | |
| 393 | mtspr DBAT2L, r4 | |
| 394 | mtspr DBAT2U, r3 | |
| 395 | isync | |
| 396 | ||
| 397 | /* IBAT 3 */ | |
| 398 | addis r4, r0, CFG_IBAT3L@h | |
| 399 | ori r4, r4, CFG_IBAT3L@l | |
| 400 | addis r3, r0, CFG_IBAT3U@h | |
| 401 | ori r3, r3, CFG_IBAT3U@l | |
| 402 | mtspr IBAT3L, r4 | |
| 403 | mtspr IBAT3U, r3 | |
| 404 | isync | |
| 405 | ||
| 406 | /* DBAT 3 */ | |
| 407 | addis r4, r0, CFG_DBAT3L@h | |
| 408 | ori r4, r4, CFG_DBAT3L@l | |
| 409 | addis r3, r0, CFG_DBAT3U@h | |
| 410 | ori r3, r3, CFG_DBAT3U@l | |
| 411 | mtspr DBAT3L, r4 | |
| 412 | mtspr DBAT3U, r3 | |
| 413 | isync | |
| 414 | ||
| 72755c71 WD |
415 | #ifdef CONFIG_750FX |
| 416 | /* IBAT 4 */ | |
| 8bde7f77 WD |
417 | addis r4, r0, CFG_IBAT4L@h |
| 418 | ori r4, r4, CFG_IBAT4L@l | |
| 419 | addis r3, r0, CFG_IBAT4U@h | |
| 420 | ori r3, r3, CFG_IBAT4U@l | |
| 421 | mtspr IBAT4L, r4 | |
| 422 | mtspr IBAT4U, r3 | |
| 423 | isync | |
| 72755c71 WD |
424 | |
| 425 | /* DBAT 4 */ | |
| 8bde7f77 WD |
426 | addis r4, r0, CFG_DBAT4L@h |
| 427 | ori r4, r4, CFG_DBAT4L@l | |
| 428 | addis r3, r0, CFG_DBAT4U@h | |
| 429 | ori r3, r3, CFG_DBAT4U@l | |
| 430 | mtspr DBAT4L, r4 | |
| 431 | mtspr DBAT4U, r3 | |
| 432 | isync | |
| 433 | ||
| 434 | /* IBAT 5 */ | |
| 435 | addis r4, r0, CFG_IBAT5L@h | |
| 436 | ori r4, r4, CFG_IBAT5L@l | |
| 437 | addis r3, r0, CFG_IBAT5U@h | |
| 438 | ori r3, r3, CFG_IBAT5U@l | |
| 439 | mtspr IBAT5L, r4 | |
| 440 | mtspr IBAT5U, r3 | |
| 441 | isync | |
| 72755c71 WD |
442 | |
| 443 | /* DBAT 5 */ | |
| 8bde7f77 WD |
444 | addis r4, r0, CFG_DBAT5L@h |
| 445 | ori r4, r4, CFG_DBAT5L@l | |
| 446 | addis r3, r0, CFG_DBAT5U@h | |
| 447 | ori r3, r3, CFG_DBAT5U@l | |
| 448 | mtspr DBAT5L, r4 | |
| 449 | mtspr DBAT5U, r3 | |
| 450 | isync | |
| 451 | ||
| 452 | /* IBAT 6 */ | |
| 453 | addis r4, r0, CFG_IBAT6L@h | |
| 454 | ori r4, r4, CFG_IBAT6L@l | |
| 455 | addis r3, r0, CFG_IBAT6U@h | |
| 456 | ori r3, r3, CFG_IBAT6U@l | |
| 457 | mtspr IBAT6L, r4 | |
| 458 | mtspr IBAT6U, r3 | |
| 459 | isync | |
| 72755c71 WD |
460 | |
| 461 | /* DBAT 6 */ | |
| 8bde7f77 WD |
462 | addis r4, r0, CFG_DBAT6L@h |
| 463 | ori r4, r4, CFG_DBAT6L@l | |
| 464 | addis r3, r0, CFG_DBAT6U@h | |
| 465 | ori r3, r3, CFG_DBAT6U@l | |
| 466 | mtspr DBAT6L, r4 | |
| 467 | mtspr DBAT6U, r3 | |
| 468 | isync | |
| 469 | ||
| 470 | /* IBAT 7 */ | |
| 471 | addis r4, r0, CFG_IBAT7L@h | |
| 472 | ori r4, r4, CFG_IBAT7L@l | |
| 473 | addis r3, r0, CFG_IBAT7U@h | |
| 474 | ori r3, r3, CFG_IBAT7U@l | |
| 475 | mtspr IBAT7L, r4 | |
| 476 | mtspr IBAT7U, r3 | |
| 477 | isync | |
| 72755c71 WD |
478 | |
| 479 | /* DBAT 7 */ | |
| 8bde7f77 WD |
480 | addis r4, r0, CFG_DBAT7L@h |
| 481 | ori r4, r4, CFG_DBAT7L@l | |
| 482 | addis r3, r0, CFG_DBAT7U@h | |
| 483 | ori r3, r3, CFG_DBAT7U@l | |
| 484 | mtspr DBAT7L, r4 | |
| 485 | mtspr DBAT7U, r3 | |
| 486 | isync | |
| 72755c71 WD |
487 | #endif |
| 488 | ||
| 47d1a6e1 WD |
489 | /* bats are done, now invalidate the TLBs */ |
| 490 | ||
| 491 | addis r3, 0, 0x0000 | |
| 492 | addis r5, 0, 0x4 /* upper bound of 0x00040000 for 7400/750 */ | |
| 493 | ||
| 494 | isync | |
| 495 | ||
| 496 | tlblp: | |
| 497 | tlbie r3 | |
| 498 | sync | |
| 499 | addi r3, r3, 0x1000 | |
| 500 | cmp 0, 0, r3, r5 | |
| 501 | blt tlblp | |
| 502 | ||
| 503 | blr | |
| 504 | ||
| 505 | .globl enable_addr_trans | |
| 506 | enable_addr_trans: | |
| 507 | /* enable address translation */ | |
| 508 | mfmsr r5 | |
| 509 | ori r5, r5, (MSR_IR | MSR_DR) | |
| 510 | mtmsr r5 | |
| 511 | isync | |
| 512 | blr | |
| 513 | ||
| 514 | .globl disable_addr_trans | |
| 515 | disable_addr_trans: | |
| 516 | /* disable address translation */ | |
| 517 | mflr r4 | |
| 518 | mfmsr r3 | |
| 519 | andi. r0, r3, (MSR_IR | MSR_DR) | |
| 520 | beqlr | |
| 521 | andc r3, r3, r0 | |
| 522 | mtspr SRR0, r4 | |
| 523 | mtspr SRR1, r3 | |
| 524 | rfi | |
| 525 | ||
| 526 | /* | |
| 527 | * This code finishes saving the registers to the exception frame | |
| 528 | * and jumps to the appropriate handler for the exception. | |
| 529 | * Register r21 is pointer into trap frame, r1 has new stack pointer. | |
| 530 | */ | |
| 531 | .globl transfer_to_handler | |
| 532 | transfer_to_handler: | |
| 533 | stw r22,_NIP(r21) | |
| 534 | lis r22,MSR_POW@h | |
| 535 | andc r23,r23,r22 | |
| 536 | stw r23,_MSR(r21) | |
| 537 | SAVE_GPR(7, r21) | |
| 538 | SAVE_4GPRS(8, r21) | |
| 539 | SAVE_8GPRS(12, r21) | |
| 540 | SAVE_8GPRS(24, r21) | |
| 541 | mflr r23 | |
| 542 | andi. r24,r23,0x3f00 /* get vector offset */ | |
| 543 | stw r24,TRAP(r21) | |
| 544 | li r22,0 | |
| 545 | stw r22,RESULT(r21) | |
| 546 | mtspr SPRG2,r22 /* r1 is now kernel sp */ | |
| 547 | lwz r24,0(r23) /* virtual address of handler */ | |
| 548 | lwz r23,4(r23) /* where to go when done */ | |
| 549 | mtspr SRR0,r24 | |
| 550 | mtspr SRR1,r20 | |
| 551 | mtlr r23 | |
| 552 | SYNC | |
| 553 | rfi /* jump to handler, enable MMU */ | |
| 554 | ||
| 555 | int_return: | |
| 556 | mfmsr r28 /* Disable interrupts */ | |
| 557 | li r4,0 | |
| 558 | ori r4,r4,MSR_EE | |
| 559 | andc r28,r28,r4 | |
| 560 | SYNC /* Some chip revs need this... */ | |
| 561 | mtmsr r28 | |
| 562 | SYNC | |
| 563 | lwz r2,_CTR(r1) | |
| 564 | lwz r0,_LINK(r1) | |
| 565 | mtctr r2 | |
| 566 | mtlr r0 | |
| 567 | lwz r2,_XER(r1) | |
| 568 | lwz r0,_CCR(r1) | |
| 569 | mtspr XER,r2 | |
| 570 | mtcrf 0xFF,r0 | |
| 571 | REST_10GPRS(3, r1) | |
| 572 | REST_10GPRS(13, r1) | |
| 573 | REST_8GPRS(23, r1) | |
| 574 | REST_GPR(31, r1) | |
| 575 | lwz r2,_NIP(r1) /* Restore environment */ | |
| 576 | lwz r0,_MSR(r1) | |
| 577 | mtspr SRR0,r2 | |
| 578 | mtspr SRR1,r0 | |
| 579 | lwz r0,GPR0(r1) | |
| 580 | lwz r2,GPR2(r1) | |
| 581 | lwz r1,GPR1(r1) | |
| 582 | SYNC | |
| 583 | rfi | |
| 584 | ||
| 585 | .globl dc_read | |
| 586 | dc_read: | |
| 587 | blr | |
| 588 | ||
| 589 | .globl get_pvr | |
| 590 | get_pvr: | |
| 591 | mfspr r3, PVR | |
| 592 | blr | |
| 593 | ||
| 594 | /*-----------------------------------------------------------------------*/ | |
| 595 | /* | |
| 596 | * void relocate_code (addr_sp, gd, addr_moni) | |
| 597 | * | |
| 598 | * This "function" does not return, instead it continues in RAM | |
| 599 | * after relocating the monitor code. | |
| 600 | * | |
| 601 | * r3 = dest | |
| 602 | * r4 = src | |
| 603 | * r5 = length in bytes | |
| 604 | * r6 = cachelinesize | |
| 605 | */ | |
| 606 | .globl relocate_code | |
| 607 | relocate_code: | |
| 608 | mr r1, r3 /* Set new stack pointer */ | |
| 609 | mr r9, r4 /* Save copy of Global Data pointer */ | |
| 610 | mr r10, r5 /* Save copy of Destination Address */ | |
| 611 | ||
| 612 | mr r3, r5 /* Destination Address */ | |
| 613 | lis r4, CFG_MONITOR_BASE@h /* Source Address */ | |
| 614 | ori r4, r4, CFG_MONITOR_BASE@l | |
| 3b57fe0a WD |
615 | lwz r5, GOT(__init_end) |
| 616 | sub r5, r5, r4 | |
| 47d1a6e1 WD |
617 | li r6, CFG_CACHELINE_SIZE /* Cache Line Size */ |
| 618 | ||
| 619 | /* | |
| 620 | * Fix GOT pointer: | |
| 621 | * | |
| 622 | * New GOT-PTR = (old GOT-PTR - CFG_MONITOR_BASE) + Destination Address | |
| 623 | * | |
| 624 | * Offset: | |
| 625 | */ | |
| 626 | sub r15, r10, r4 | |
| 627 | ||
| 628 | /* First our own GOT */ | |
| 629 | add r14, r14, r15 | |
| 630 | /* then the one used by the C code */ | |
| 631 | add r30, r30, r15 | |
| 632 | ||
| 633 | /* | |
| 634 | * Now relocate code | |
| 635 | */ | |
| 636 | #ifdef CONFIG_ECC | |
| 637 | bl board_relocate_rom | |
| 638 | sync | |
| 639 | mr r3, r10 /* Destination Address */ | |
| 640 | lis r4, CFG_MONITOR_BASE@h /* Source Address */ | |
| 641 | ori r4, r4, CFG_MONITOR_BASE@l | |
| 3b57fe0a WD |
642 | lwz r5, GOT(__init_end) |
| 643 | sub r5, r5, r4 | |
| 47d1a6e1 WD |
644 | li r6, CFG_CACHELINE_SIZE /* Cache Line Size */ |
| 645 | #else | |
| 646 | cmplw cr1,r3,r4 | |
| 647 | addi r0,r5,3 | |
| 648 | srwi. r0,r0,2 | |
| 649 | beq cr1,4f /* In place copy is not necessary */ | |
| 650 | beq 7f /* Protect against 0 count */ | |
| 651 | mtctr r0 | |
| 652 | bge cr1,2f | |
| 653 | ||
| 654 | la r8,-4(r4) | |
| 655 | la r7,-4(r3) | |
| 656 | 1: lwzu r0,4(r8) | |
| 657 | stwu r0,4(r7) | |
| 658 | bdnz 1b | |
| 659 | b 4f | |
| 660 | ||
| 661 | 2: slwi r0,r0,2 | |
| 662 | add r8,r4,r0 | |
| 663 | add r7,r3,r0 | |
| 664 | 3: lwzu r0,-4(r8) | |
| 665 | stwu r0,-4(r7) | |
| 666 | bdnz 3b | |
| 667 | #endif | |
| 668 | /* | |
| 669 | * Now flush the cache: note that we must start from a cache aligned | |
| 670 | * address. Otherwise we might miss one cache line. | |
| 671 | */ | |
| 672 | 4: cmpwi r6,0 | |
| 673 | add r5,r3,r5 | |
| 674 | beq 7f /* Always flush prefetch queue in any case */ | |
| 675 | subi r0,r6,1 | |
| 676 | andc r3,r3,r0 | |
| 677 | mr r4,r3 | |
| 678 | 5: dcbst 0,r4 | |
| 679 | add r4,r4,r6 | |
| 680 | cmplw r4,r5 | |
| 681 | blt 5b | |
| 682 | sync /* Wait for all dcbst to complete on bus */ | |
| 683 | mr r4,r3 | |
| 684 | 6: icbi 0,r4 | |
| 685 | add r4,r4,r6 | |
| 686 | cmplw r4,r5 | |
| 687 | blt 6b | |
| 688 | 7: sync /* Wait for all icbi to complete on bus */ | |
| 689 | isync | |
| 690 | ||
| 691 | /* | |
| 692 | * We are done. Do not return, instead branch to second part of board | |
| 693 | * initialization, now running from RAM. | |
| 694 | */ | |
| 695 | addi r0, r10, in_ram - _start + EXC_OFF_SYS_RESET | |
| 696 | mtlr r0 | |
| 697 | blr | |
| 698 | ||
| 699 | in_ram: | |
| 700 | #ifdef CONFIG_ECC | |
| 701 | bl board_init_ecc | |
| 702 | #endif | |
| 703 | /* | |
| 704 | * Relocation Function, r14 point to got2+0x8000 | |
| 705 | * | |
| 8bde7f77 WD |
706 | * Adjust got2 pointers, no need to check for 0, this code |
| 707 | * already puts a few entries in the table. | |
| 47d1a6e1 WD |
708 | */ |
| 709 | li r0,__got2_entries@sectoff@l | |
| 710 | la r3,GOT(_GOT2_TABLE_) | |
| 711 | lwz r11,GOT(_GOT2_TABLE_) | |
| 712 | mtctr r0 | |
| 713 | sub r11,r3,r11 | |
| 714 | addi r3,r3,-4 | |
| 715 | 1: lwzu r0,4(r3) | |
| 716 | add r0,r0,r11 | |
| 717 | stw r0,0(r3) | |
| 718 | bdnz 1b | |
| 719 | ||
| 720 | /* | |
| 8bde7f77 | 721 | * Now adjust the fixups and the pointers to the fixups |
| 47d1a6e1 WD |
722 | * in case we need to move ourselves again. |
| 723 | */ | |
| 724 | 2: li r0,__fixup_entries@sectoff@l | |
| 725 | lwz r3,GOT(_FIXUP_TABLE_) | |
| 726 | cmpwi r0,0 | |
| 727 | mtctr r0 | |
| 728 | addi r3,r3,-4 | |
| 729 | beq 4f | |
| 730 | 3: lwzu r4,4(r3) | |
| 731 | lwzux r0,r4,r11 | |
| 732 | add r0,r0,r11 | |
| 733 | stw r10,0(r3) | |
| 734 | stw r0,0(r4) | |
| 735 | bdnz 3b | |
| 736 | 4: | |
| 737 | /* clear_bss: */ | |
| 738 | /* | |
| 739 | * Now clear BSS segment | |
| 740 | */ | |
| 5d232d0e | 741 | lwz r3,GOT(__bss_start) |
| 47d1a6e1 WD |
742 | lwz r4,GOT(_end) |
| 743 | ||
| 744 | cmplw 0, r3, r4 | |
| 745 | beq 6f | |
| 746 | ||
| 747 | li r0, 0 | |
| 748 | 5: | |
| 749 | stw r0, 0(r3) | |
| 750 | addi r3, r3, 4 | |
| 751 | cmplw 0, r3, r4 | |
| 752 | bne 5b | |
| 753 | 6: | |
| 754 | mr r3, r10 /* Destination Address */ | |
| 3a473b2a WD |
755 | #if defined(CONFIG_AMIGAONEG3SE) || \ |
| 756 | defined(CONFIG_DB64360) || \ | |
| 757 | defined(CONFIG_DB64460) | |
| 7c7a23bd WD |
758 | mr r4, r9 /* Use RAM copy of the global data */ |
| 759 | #endif | |
| 47d1a6e1 WD |
760 | bl after_reloc |
| 761 | ||
| 762 | /* not reached - end relocate_code */ | |
| 763 | /*-----------------------------------------------------------------------*/ | |
| 764 | ||
| 47d1a6e1 WD |
765 | /* |
| 766 | * Copy exception vector code to low memory | |
| 767 | * | |
| 768 | * r3: dest_addr | |
| 769 | * r7: source address, r8: end address, r9: target address | |
| 770 | */ | |
| 771 | .globl trap_init | |
| 772 | trap_init: | |
| 773 | lwz r7, GOT(_start) | |
| 774 | lwz r8, GOT(_end_of_vectors) | |
| 775 | ||
| 682011ff | 776 | li r9, 0x100 /* reset vector always at 0x100 */ |
| 47d1a6e1 WD |
777 | |
| 778 | cmplw 0, r7, r8 | |
| 779 | bgelr /* return if r7>=r8 - just in case */ | |
| 780 | ||
| 781 | mflr r4 /* save link register */ | |
| 782 | 1: | |
| 783 | lwz r0, 0(r7) | |
| 784 | stw r0, 0(r9) | |
| 785 | addi r7, r7, 4 | |
| 786 | addi r9, r9, 4 | |
| 787 | cmplw 0, r7, r8 | |
| 788 | bne 1b | |
| 789 | ||
| 790 | /* | |
| 791 | * relocate `hdlr' and `int_return' entries | |
| 792 | */ | |
| 793 | li r7, .L_MachineCheck - _start + EXC_OFF_SYS_RESET | |
| 794 | li r8, Alignment - _start + EXC_OFF_SYS_RESET | |
| 795 | 2: | |
| 796 | bl trap_reloc | |
| 797 | addi r7, r7, 0x100 /* next exception vector */ | |
| 798 | cmplw 0, r7, r8 | |
| 799 | blt 2b | |
| 800 | ||
| 801 | li r7, .L_Alignment - _start + EXC_OFF_SYS_RESET | |
| 802 | bl trap_reloc | |
| 803 | ||
| 804 | li r7, .L_ProgramCheck - _start + EXC_OFF_SYS_RESET | |
| 805 | bl trap_reloc | |
| 806 | ||
| 807 | li r7, .L_FPUnavailable - _start + EXC_OFF_SYS_RESET | |
| 808 | li r8, SystemCall - _start + EXC_OFF_SYS_RESET | |
| 809 | 3: | |
| 810 | bl trap_reloc | |
| 811 | addi r7, r7, 0x100 /* next exception vector */ | |
| 812 | cmplw 0, r7, r8 | |
| 813 | blt 3b | |
| 814 | ||
| 815 | li r7, .L_SingleStep - _start + EXC_OFF_SYS_RESET | |
| 816 | li r8, _end_of_vectors - _start + EXC_OFF_SYS_RESET | |
| 817 | 4: | |
| 818 | bl trap_reloc | |
| 819 | addi r7, r7, 0x100 /* next exception vector */ | |
| 820 | cmplw 0, r7, r8 | |
| 821 | blt 4b | |
| 822 | ||
| 823 | /* enable execptions from RAM vectors */ | |
| 824 | mfmsr r7 | |
| 825 | li r8,MSR_IP | |
| 826 | andc r7,r7,r8 | |
| 827 | mtmsr r7 | |
| 828 | ||
| 829 | mtlr r4 /* restore link register */ | |
| 830 | blr | |
| 831 | ||
| 832 | /* | |
| 833 | * Function: relocate entries for one exception vector | |
| 834 | */ | |
| 835 | trap_reloc: | |
| 836 | lwz r0, 0(r7) /* hdlr ... */ | |
| 837 | add r0, r0, r3 /* ... += dest_addr */ | |
| 838 | stw r0, 0(r7) | |
| 839 | ||
| 840 | lwz r0, 4(r7) /* int_return ... */ | |
| 841 | add r0, r0, r3 /* ... += dest_addr */ | |
| 842 | stw r0, 4(r7) | |
| 843 | ||
| 844 | sync | |
| 845 | isync | |
| 846 | ||
| 847 | blr | |
| 848 | ||
| 849 | #ifdef CFG_INIT_RAM_LOCK | |
| 850 | lock_ram_in_cache: | |
| 851 | /* Allocate Initial RAM in data cache. | |
| 852 | */ | |
| 853 | lis r3, (CFG_INIT_RAM_ADDR & ~31)@h | |
| 854 | ori r3, r3, (CFG_INIT_RAM_ADDR & ~31)@l | |
| 855 | li r2, ((CFG_INIT_RAM_END & ~31) + \ | |
| 856 | (CFG_INIT_RAM_ADDR & 31) + 31) / 32 | |
| 857 | mtctr r2 | |
| 858 | 1: | |
| 859 | dcbz r0, r3 | |
| 860 | addi r3, r3, 32 | |
| 861 | bdnz 1b | |
| 862 | ||
| 863 | /* Lock the data cache */ | |
| 864 | mfspr r0, HID0 | |
| 865 | ori r0, r0, 0x1000 | |
| 866 | sync | |
| 867 | mtspr HID0, r0 | |
| 868 | sync | |
| 869 | blr | |
| 870 | ||
| 871 | .globl unlock_ram_in_cache | |
| 872 | unlock_ram_in_cache: | |
| 873 | /* invalidate the INIT_RAM section */ | |
| 874 | lis r3, (CFG_INIT_RAM_ADDR & ~31)@h | |
| 875 | ori r3, r3, (CFG_INIT_RAM_ADDR & ~31)@l | |
| 876 | li r2, ((CFG_INIT_RAM_END & ~31) + \ | |
| 877 | (CFG_INIT_RAM_ADDR & 31) + 31) / 32 | |
| 878 | mtctr r2 | |
| 879 | 1: icbi r0, r3 | |
| 880 | addi r3, r3, 32 | |
| 881 | bdnz 1b | |
| 882 | sync /* Wait for all icbi to complete on bus */ | |
| 883 | isync | |
| 884 | ||
| 885 | /* Unlock the data cache and invalidate it */ | |
| 886 | mfspr r0, HID0 | |
| 887 | li r3,0x1000 | |
| 888 | andc r0,r0,r3 | |
| 889 | li r3,0x0400 | |
| 890 | or r0,r0,r3 | |
| 891 | sync | |
| 892 | mtspr HID0, r0 | |
| 893 | sync | |
| 894 | blr | |
| 895 | #endif |