projects / people / ms / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| f046ccd1 EL |
1 | /* |
| 2 | * Copyright (C) 1998 Dan Malek <dmalek@jlc.net> | |
| 3 | * Copyright (C) 1999 Magnus Damm <kieraypc01.p.y.kie.era.ericsson.se> | |
| 4 | * Copyright (C) 2000, 2001,2002 Wolfgang Denk <wd@denx.de> | |
| e4c09508 | 5 | * Copyright Freescale Semiconductor, Inc. 2004, 2006, 2008. |
| f046ccd1 EL |
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 | /* | |
| 27 | * U-Boot - Startup Code for MPC83xx PowerPC based Embedded Boards | |
| 28 | */ | |
| 29 | ||
| 30 | #include <config.h> | |
| de1d0a69 | 31 | #include <mpc83xx.h> |
| 561858ee | 32 | #include <timestamp.h> |
| f046ccd1 EL |
33 | #include <version.h> |
| 34 | ||
| 35 | #define CONFIG_83XX 1 /* needed for Linux kernel header files*/ | |
| 36 | #define _LINUX_CONFIG_H 1 /* avoid reading Linux autoconf.h file */ | |
| 37 | ||
| 38 | #include <ppc_asm.tmpl> | |
| 39 | #include <ppc_defs.h> | |
| 40 | ||
| 41 | #include <asm/cache.h> | |
| 42 | #include <asm/mmu.h> | |
| 43 | ||
| 44 | #ifndef CONFIG_IDENT_STRING | |
| 45 | #define CONFIG_IDENT_STRING "MPC83XX" | |
| 46 | #endif | |
| 47 | ||
| 48 | /* We don't want the MMU yet. | |
| 49 | */ | |
| 50 | #undef MSR_KERNEL | |
| 51 | ||
| 52 | /* | |
| 53 | * Floating Point enable, Machine Check and Recoverable Interr. | |
| 54 | */ | |
| 55 | #ifdef DEBUG | |
| 56 | #define MSR_KERNEL (MSR_FP|MSR_RI) | |
| 57 | #else | |
| 58 | #define MSR_KERNEL (MSR_FP|MSR_ME|MSR_RI) | |
| 59 | #endif | |
| 60 | ||
| 6d0f6bcf JCPV |
61 | #if !defined(CONFIG_NAND_SPL) && !defined(CONFIG_SYS_RAMBOOT) |
| 62 | #define CONFIG_SYS_FLASHBOOT | |
| e4c09508 SW |
63 | #endif |
| 64 | ||
| f046ccd1 EL |
65 | /* |
| 66 | * Set up GOT: Global Offset Table | |
| 67 | * | |
| 0f8aa159 | 68 | * Use r12 to access the GOT |
| f046ccd1 EL |
69 | */ |
| 70 | START_GOT | |
| 71 | GOT_ENTRY(_GOT2_TABLE_) | |
| e4c09508 SW |
72 | GOT_ENTRY(__bss_start) |
| 73 | GOT_ENTRY(_end) | |
| f046ccd1 | 74 | |
| e4c09508 SW |
75 | #ifndef CONFIG_NAND_SPL |
| 76 | GOT_ENTRY(_FIXUP_TABLE_) | |
| f046ccd1 EL |
77 | GOT_ENTRY(_start) |
| 78 | GOT_ENTRY(_start_of_vectors) | |
| 79 | GOT_ENTRY(_end_of_vectors) | |
| 80 | GOT_ENTRY(transfer_to_handler) | |
| e4c09508 | 81 | #endif |
| f046ccd1 EL |
82 | END_GOT |
| 83 | ||
| 84 | /* | |
| f35f3582 JVB |
85 | * The Hard Reset Configuration Word (HRCW) table is in the first 64 |
| 86 | * (0x40) bytes of flash. It has 8 bytes, but each byte is repeated 8 | |
| 87 | * times so the processor can fetch it out of flash whether the flash | |
| 88 | * is 8, 16, 32, or 64 bits wide (hardware trickery). | |
| f046ccd1 | 89 | */ |
| f046ccd1 EL |
90 | .text |
| 91 | #define _HRCW_TABLE_ENTRY(w) \ | |
| 92 | .fill 8,1,(((w)>>24)&0xff); \ | |
| 93 | .fill 8,1,(((w)>>16)&0xff); \ | |
| 94 | .fill 8,1,(((w)>> 8)&0xff); \ | |
| 95 | .fill 8,1,(((w) )&0xff) | |
| 96 | ||
| 6d0f6bcf JCPV |
97 | _HRCW_TABLE_ENTRY(CONFIG_SYS_HRCW_LOW) |
| 98 | _HRCW_TABLE_ENTRY(CONFIG_SYS_HRCW_HIGH) | |
| f046ccd1 | 99 | |
| f35f3582 JVB |
100 | /* |
| 101 | * Magic number and version string - put it after the HRCW since it | |
| 102 | * cannot be first in flash like it is in many other processors. | |
| 103 | */ | |
| 104 | .long 0x27051956 /* U-Boot Magic Number */ | |
| 105 | ||
| 106 | .globl version_string | |
| 107 | version_string: | |
| 108 | .ascii U_BOOT_VERSION | |
| 561858ee | 109 | .ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")" |
| f35f3582 JVB |
110 | .ascii " ", CONFIG_IDENT_STRING, "\0" |
| 111 | ||
| 455a4691 RM |
112 | .align 2 |
| 113 | ||
| 114 | .globl enable_addr_trans | |
| 115 | enable_addr_trans: | |
| 116 | /* enable address translation */ | |
| 117 | mfmsr r5 | |
| 118 | ori r5, r5, (MSR_IR | MSR_DR) | |
| 119 | mtmsr r5 | |
| 120 | isync | |
| 121 | blr | |
| 122 | ||
| 123 | .globl disable_addr_trans | |
| 124 | disable_addr_trans: | |
| 125 | /* disable address translation */ | |
| 126 | mflr r4 | |
| 127 | mfmsr r3 | |
| 128 | andi. r0, r3, (MSR_IR | MSR_DR) | |
| 129 | beqlr | |
| 130 | andc r3, r3, r0 | |
| 131 | mtspr SRR0, r4 | |
| 132 | mtspr SRR1, r3 | |
| 133 | rfi | |
| 134 | ||
| 135 | .globl get_pvr | |
| 136 | get_pvr: | |
| 137 | mfspr r3, PVR | |
| 138 | blr | |
| 139 | ||
| 140 | .globl ppcDWstore | |
| 141 | ppcDWstore: | |
| 142 | lfd 1, 0(r4) | |
| 143 | stfd 1, 0(r3) | |
| 144 | blr | |
| 145 | ||
| 146 | .globl ppcDWload | |
| 147 | ppcDWload: | |
| 148 | lfd 1, 0(r3) | |
| 149 | stfd 1, 0(r4) | |
| 150 | blr | |
| f046ccd1 | 151 | |
| f046ccd1 EL |
152 | #ifndef CONFIG_DEFAULT_IMMR |
| 153 | #error CONFIG_DEFAULT_IMMR must be defined | |
| 6d0f6bcf JCPV |
154 | #endif /* CONFIG_SYS_DEFAULT_IMMR */ |
| 155 | #ifndef CONFIG_SYS_IMMR | |
| 156 | #define CONFIG_SYS_IMMR CONFIG_DEFAULT_IMMR | |
| 157 | #endif /* CONFIG_SYS_IMMR */ | |
| f046ccd1 EL |
158 | |
| 159 | /* | |
| 160 | * After configuration, a system reset exception is executed using the | |
| 161 | * vector at offset 0x100 relative to the base set by MSR[IP]. If | |
| 162 | * MSR[IP] is 0, the base address is 0x00000000. If MSR[IP] is 1, the | |
| 163 | * base address is 0xfff00000. In the case of a Power On Reset or Hard | |
| 164 | * Reset, the value of MSR[IP] is determined by the CIP field in the | |
| 165 | * HRCW. | |
| 166 | * | |
| 167 | * Other bits in the HRCW set up the Base Address and Port Size in BR0. | |
| 168 | * This determines the location of the boot ROM (flash or EPROM) in the | |
| 169 | * processor's address space at boot time. As long as the HRCW is set up | |
| 170 | * so that we eventually end up executing the code below when the | |
| 171 | * processor executes the reset exception, the actual values used should | |
| 172 | * not matter. | |
| 173 | * | |
| 174 | * Once we have got here, the address mask in OR0 is cleared so that the | |
| 175 | * bottom 32K of the boot ROM is effectively repeated all throughout the | |
| 176 | * processor's address space, after which we can jump to the absolute | |
| 177 | * address at which the boot ROM was linked at compile time, and proceed | |
| 178 | * to initialise the memory controller without worrying if the rug will | |
| 179 | * be pulled out from under us, so to speak (it will be fine as long as | |
| 180 | * we configure BR0 with the same boot ROM link address). | |
| 181 | */ | |
| 182 | . = EXC_OFF_SYS_RESET | |
| 183 | ||
| 184 | .globl _start | |
| 185 | _start: /* time t 0 */ | |
| 186 | li r21, BOOTFLAG_COLD /* Normal Power-On: Boot from FLASH*/ | |
| 187 | nop | |
| 188 | b boot_cold | |
| 189 | ||
| 190 | . = EXC_OFF_SYS_RESET + 0x10 | |
| 191 | ||
| 192 | .globl _start_warm | |
| de1d0a69 | 193 | _start_warm: |
| f046ccd1 EL |
194 | li r21, BOOTFLAG_WARM /* Software reboot */ |
| 195 | b boot_warm | |
| 196 | ||
| 197 | ||
| 198 | boot_cold: /* time t 3 */ | |
| 199 | lis r4, CONFIG_DEFAULT_IMMR@h | |
| 200 | nop | |
| 201 | boot_warm: /* time t 5 */ | |
| 202 | mfmsr r5 /* save msr contents */ | |
| 66778761 SW |
203 | |
| 204 | /* 83xx manuals prescribe a specific sequence for updating IMMRBAR. */ | |
| 205 | bl 1f | |
| 206 | 1: mflr r7 | |
| 207 | ||
| 6d0f6bcf JCPV |
208 | lis r3, CONFIG_SYS_IMMR@h |
| 209 | ori r3, r3, CONFIG_SYS_IMMR@l | |
| 66778761 SW |
210 | |
| 211 | lwz r6, IMMRBAR(r4) | |
| 212 | isync | |
| 213 | ||
| f046ccd1 | 214 | stw r3, IMMRBAR(r4) |
| 66778761 SW |
215 | lwz r6, 0(r7) /* Arbitrary external load */ |
| 216 | isync | |
| 217 | ||
| 218 | lwz r6, IMMRBAR(r3) | |
| 219 | isync | |
| de1d0a69 | 220 | |
| f046ccd1 EL |
221 | /* Initialise the E300 processor core */ |
| 222 | /*------------------------------------------*/ | |
| de1d0a69 | 223 | |
| fa7b1c07 LS |
224 | #ifdef CONFIG_NAND_SPL |
| 225 | /* The FCM begins execution after only the first page | |
| 226 | * is loaded. Wait for the rest before branching | |
| 227 | * to another flash page. | |
| 228 | */ | |
| 66778761 | 229 | 1: lwz r6, 0x50b0(r3) |
| fa7b1c07 LS |
230 | andi. r6, r6, 1 |
| 231 | beq 1b | |
| 232 | #endif | |
| 233 | ||
| f046ccd1 | 234 | bl init_e300_core |
| de1d0a69 | 235 | |
| 6d0f6bcf | 236 | #ifdef CONFIG_SYS_FLASHBOOT |
| f046ccd1 EL |
237 | |
| 238 | /* Inflate flash location so it appears everywhere, calculate */ | |
| 239 | /* the absolute address in final location of the FLASH, jump */ | |
| 240 | /* there and deflate the flash size back to minimal size */ | |
| 241 | /*------------------------------------------------------------*/ | |
| 242 | bl map_flash_by_law1 | |
| 6d0f6bcf JCPV |
243 | lis r4, (CONFIG_SYS_MONITOR_BASE)@h |
| 244 | ori r4, r4, (CONFIG_SYS_MONITOR_BASE)@l | |
| f046ccd1 EL |
245 | addi r5, r4, in_flash - _start + EXC_OFF_SYS_RESET |
| 246 | mtlr r5 | |
| 247 | blr | |
| 248 | in_flash: | |
| 249 | #if 1 /* Remapping flash with LAW0. */ | |
| 250 | bl remap_flash_by_law0 | |
| 251 | #endif | |
| 6d0f6bcf | 252 | #endif /* CONFIG_SYS_FLASHBOOT */ |
| f046ccd1 | 253 | |
| 2688e2f9 KG |
254 | /* setup the bats */ |
| 255 | bl setup_bats | |
| 256 | sync | |
| 257 | ||
| 258 | /* | |
| 259 | * Cache must be enabled here for stack-in-cache trick. | |
| 260 | * This means we need to enable the BATS. | |
| 261 | * This means: | |
| 262 | * 1) for the EVB, original gt regs need to be mapped | |
| 263 | * 2) need to have an IBAT for the 0xf region, | |
| 264 | * we are running there! | |
| 265 | * Cache should be turned on after BATs, since by default | |
| 266 | * everything is write-through. | |
| 267 | * The init-mem BAT can be reused after reloc. The old | |
| 268 | * gt-regs BAT can be reused after board_init_f calls | |
| 269 | * board_early_init_f (EVB only). | |
| 270 | */ | |
| 271 | /* enable address translation */ | |
| 272 | bl enable_addr_trans | |
| 273 | sync | |
| 274 | ||
| 6eb2a44e | 275 | /* enable the data cache */ |
| 2688e2f9 KG |
276 | bl dcache_enable |
| 277 | sync | |
| 6d0f6bcf | 278 | #ifdef CONFIG_SYS_INIT_RAM_LOCK |
| 2688e2f9 KG |
279 | bl lock_ram_in_cache |
| 280 | sync | |
| 281 | #endif | |
| 282 | ||
| 283 | /* set up the stack pointer in our newly created | |
| 284 | * cache-ram (r1) */ | |
| 6d0f6bcf JCPV |
285 | lis r1, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET)@h |
| 286 | ori r1, r1, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET)@l | |
| 2688e2f9 KG |
287 | |
| 288 | li r0, 0 /* Make room for stack frame header and */ | |
| 289 | stwu r0, -4(r1) /* clear final stack frame so that */ | |
| 290 | stwu r0, -4(r1) /* stack backtraces terminate cleanly */ | |
| 291 | ||
| f046ccd1 EL |
292 | |
| 293 | /* let the C-code set up the rest */ | |
| 2688e2f9 | 294 | /* */ |
| f046ccd1 EL |
295 | /* Be careful to keep code relocatable & stack humble */ |
| 296 | /*------------------------------------------------------*/ | |
| 297 | ||
| 298 | GET_GOT /* initialize GOT access */ | |
| 299 | ||
| 300 | /* r3: IMMR */ | |
| 6d0f6bcf | 301 | lis r3, CONFIG_SYS_IMMR@h |
| f046ccd1 EL |
302 | /* run low-level CPU init code (in Flash)*/ |
| 303 | bl cpu_init_f | |
| 304 | ||
| 305 | /* r3: BOOTFLAG */ | |
| 306 | mr r3, r21 | |
| 307 | /* run 1st part of board init code (in Flash)*/ | |
| 308 | bl board_init_f | |
| 309 | ||
| e4c09508 | 310 | #ifndef CONFIG_NAND_SPL |
| f046ccd1 EL |
311 | /* |
| 312 | * Vector Table | |
| 313 | */ | |
| 314 | ||
| 315 | .globl _start_of_vectors | |
| 316 | _start_of_vectors: | |
| 317 | ||
| 318 | /* Machine check */ | |
| 319 | STD_EXCEPTION(0x200, MachineCheck, MachineCheckException) | |
| 320 | ||
| 321 | /* Data Storage exception. */ | |
| 322 | STD_EXCEPTION(0x300, DataStorage, UnknownException) | |
| 323 | ||
| 324 | /* Instruction Storage exception. */ | |
| 325 | STD_EXCEPTION(0x400, InstStorage, UnknownException) | |
| 326 | ||
| 327 | /* External Interrupt exception. */ | |
| 328 | #ifndef FIXME | |
| 329 | STD_EXCEPTION(0x500, ExtInterrupt, external_interrupt) | |
| de1d0a69 | 330 | #endif |
| f046ccd1 EL |
331 | |
| 332 | /* Alignment exception. */ | |
| 333 | . = 0x600 | |
| 334 | Alignment: | |
| 02032e8f | 335 | EXCEPTION_PROLOG(SRR0, SRR1) |
| f046ccd1 EL |
336 | mfspr r4,DAR |
| 337 | stw r4,_DAR(r21) | |
| 338 | mfspr r5,DSISR | |
| 339 | stw r5,_DSISR(r21) | |
| 340 | addi r3,r1,STACK_FRAME_OVERHEAD | |
| fc4e1887 | 341 | EXC_XFER_TEMPLATE(Alignment, AlignmentException, MSR_KERNEL, COPY_EE) |
| f046ccd1 EL |
342 | |
| 343 | /* Program check exception */ | |
| 344 | . = 0x700 | |
| 345 | ProgramCheck: | |
| 02032e8f | 346 | EXCEPTION_PROLOG(SRR0, SRR1) |
| f046ccd1 | 347 | addi r3,r1,STACK_FRAME_OVERHEAD |
| fc4e1887 JT |
348 | EXC_XFER_TEMPLATE(ProgramCheck, ProgramCheckException, |
| 349 | MSR_KERNEL, COPY_EE) | |
| f046ccd1 EL |
350 | |
| 351 | STD_EXCEPTION(0x800, FPUnavailable, UnknownException) | |
| 352 | ||
| 353 | /* I guess we could implement decrementer, and may have | |
| 354 | * to someday for timekeeping. | |
| 355 | */ | |
| 356 | STD_EXCEPTION(0x900, Decrementer, timer_interrupt) | |
| 357 | ||
| 358 | STD_EXCEPTION(0xa00, Trap_0a, UnknownException) | |
| 359 | STD_EXCEPTION(0xb00, Trap_0b, UnknownException) | |
| 360 | STD_EXCEPTION(0xc00, SystemCall, UnknownException) | |
| 361 | STD_EXCEPTION(0xd00, SingleStep, UnknownException) | |
| 362 | ||
| 363 | STD_EXCEPTION(0xe00, Trap_0e, UnknownException) | |
| 364 | STD_EXCEPTION(0xf00, Trap_0f, UnknownException) | |
| 365 | ||
| 366 | STD_EXCEPTION(0x1000, InstructionTLBMiss, UnknownException) | |
| 367 | STD_EXCEPTION(0x1100, DataLoadTLBMiss, UnknownException) | |
| 368 | STD_EXCEPTION(0x1200, DataStoreTLBMiss, UnknownException) | |
| 369 | #ifdef DEBUG | |
| 370 | . = 0x1300 | |
| 371 | /* | |
| 372 | * This exception occurs when the program counter matches the | |
| 373 | * Instruction Address Breakpoint Register (IABR). | |
| 374 | * | |
| 375 | * I want the cpu to halt if this occurs so I can hunt around | |
| 376 | * with the debugger and look at things. | |
| 377 | * | |
| 378 | * When DEBUG is defined, both machine check enable (in the MSR) | |
| 379 | * and checkstop reset enable (in the reset mode register) are | |
| 380 | * turned off and so a checkstop condition will result in the cpu | |
| 381 | * halting. | |
| 382 | * | |
| 383 | * I force the cpu into a checkstop condition by putting an illegal | |
| 384 | * instruction here (at least this is the theory). | |
| 385 | * | |
| 386 | * well - that didnt work, so just do an infinite loop! | |
| 387 | */ | |
| 388 | 1: b 1b | |
| 389 | #else | |
| 390 | STD_EXCEPTION(0x1300, InstructionBreakpoint, DebugException) | |
| 391 | #endif | |
| 392 | STD_EXCEPTION(0x1400, SMI, UnknownException) | |
| 393 | ||
| 394 | STD_EXCEPTION(0x1500, Trap_15, UnknownException) | |
| 395 | STD_EXCEPTION(0x1600, Trap_16, UnknownException) | |
| 396 | STD_EXCEPTION(0x1700, Trap_17, UnknownException) | |
| 397 | STD_EXCEPTION(0x1800, Trap_18, UnknownException) | |
| 398 | STD_EXCEPTION(0x1900, Trap_19, UnknownException) | |
| 399 | STD_EXCEPTION(0x1a00, Trap_1a, UnknownException) | |
| 400 | STD_EXCEPTION(0x1b00, Trap_1b, UnknownException) | |
| 401 | STD_EXCEPTION(0x1c00, Trap_1c, UnknownException) | |
| 402 | STD_EXCEPTION(0x1d00, Trap_1d, UnknownException) | |
| 403 | STD_EXCEPTION(0x1e00, Trap_1e, UnknownException) | |
| 404 | STD_EXCEPTION(0x1f00, Trap_1f, UnknownException) | |
| 405 | STD_EXCEPTION(0x2000, Trap_20, UnknownException) | |
| 406 | STD_EXCEPTION(0x2100, Trap_21, UnknownException) | |
| 407 | STD_EXCEPTION(0x2200, Trap_22, UnknownException) | |
| 408 | STD_EXCEPTION(0x2300, Trap_23, UnknownException) | |
| 409 | STD_EXCEPTION(0x2400, Trap_24, UnknownException) | |
| 410 | STD_EXCEPTION(0x2500, Trap_25, UnknownException) | |
| 411 | STD_EXCEPTION(0x2600, Trap_26, UnknownException) | |
| 412 | STD_EXCEPTION(0x2700, Trap_27, UnknownException) | |
| 413 | STD_EXCEPTION(0x2800, Trap_28, UnknownException) | |
| 414 | STD_EXCEPTION(0x2900, Trap_29, UnknownException) | |
| 415 | STD_EXCEPTION(0x2a00, Trap_2a, UnknownException) | |
| 416 | STD_EXCEPTION(0x2b00, Trap_2b, UnknownException) | |
| 417 | STD_EXCEPTION(0x2c00, Trap_2c, UnknownException) | |
| 418 | STD_EXCEPTION(0x2d00, Trap_2d, UnknownException) | |
| 419 | STD_EXCEPTION(0x2e00, Trap_2e, UnknownException) | |
| 420 | STD_EXCEPTION(0x2f00, Trap_2f, UnknownException) | |
| 421 | ||
| 422 | ||
| 423 | .globl _end_of_vectors | |
| 424 | _end_of_vectors: | |
| 425 | ||
| 426 | . = 0x3000 | |
| 427 | ||
| 428 | /* | |
| 429 | * This code finishes saving the registers to the exception frame | |
| 430 | * and jumps to the appropriate handler for the exception. | |
| 431 | * Register r21 is pointer into trap frame, r1 has new stack pointer. | |
| 432 | */ | |
| 433 | .globl transfer_to_handler | |
| 434 | transfer_to_handler: | |
| 435 | stw r22,_NIP(r21) | |
| 436 | lis r22,MSR_POW@h | |
| 437 | andc r23,r23,r22 | |
| 438 | stw r23,_MSR(r21) | |
| 439 | SAVE_GPR(7, r21) | |
| 440 | SAVE_4GPRS(8, r21) | |
| 441 | SAVE_8GPRS(12, r21) | |
| 442 | SAVE_8GPRS(24, r21) | |
| 443 | mflr r23 | |
| 444 | andi. r24,r23,0x3f00 /* get vector offset */ | |
| 445 | stw r24,TRAP(r21) | |
| 446 | li r22,0 | |
| 447 | stw r22,RESULT(r21) | |
| 448 | lwz r24,0(r23) /* virtual address of handler */ | |
| 449 | lwz r23,4(r23) /* where to go when done */ | |
| 450 | mtspr SRR0,r24 | |
| 451 | mtspr SRR1,r20 | |
| 452 | mtlr r23 | |
| 453 | SYNC | |
| 454 | rfi /* jump to handler, enable MMU */ | |
| 455 | ||
| 456 | int_return: | |
| 457 | mfmsr r28 /* Disable interrupts */ | |
| 458 | li r4,0 | |
| 459 | ori r4,r4,MSR_EE | |
| 460 | andc r28,r28,r4 | |
| 461 | SYNC /* Some chip revs need this... */ | |
| 462 | mtmsr r28 | |
| 463 | SYNC | |
| 464 | lwz r2,_CTR(r1) | |
| 465 | lwz r0,_LINK(r1) | |
| 466 | mtctr r2 | |
| 467 | mtlr r0 | |
| 468 | lwz r2,_XER(r1) | |
| 469 | lwz r0,_CCR(r1) | |
| 470 | mtspr XER,r2 | |
| 471 | mtcrf 0xFF,r0 | |
| 472 | REST_10GPRS(3, r1) | |
| 473 | REST_10GPRS(13, r1) | |
| 474 | REST_8GPRS(23, r1) | |
| 475 | REST_GPR(31, r1) | |
| 476 | lwz r2,_NIP(r1) /* Restore environment */ | |
| 477 | lwz r0,_MSR(r1) | |
| 478 | mtspr SRR0,r2 | |
| 479 | mtspr SRR1,r0 | |
| 480 | lwz r0,GPR0(r1) | |
| 481 | lwz r2,GPR2(r1) | |
| 482 | lwz r1,GPR1(r1) | |
| 483 | SYNC | |
| 484 | rfi | |
| e4c09508 | 485 | #endif /* !CONFIG_NAND_SPL */ |
| f046ccd1 EL |
486 | |
| 487 | /* | |
| 488 | * This code initialises the E300 processor core | |
| 489 | * (conforms to PowerPC 603e spec) | |
| 490 | * Note: expects original MSR contents to be in r5. | |
| 491 | */ | |
| 492 | .globl init_e300_core | |
| 493 | init_e300_core: /* time t 10 */ | |
| 494 | /* Initialize machine status; enable machine check interrupt */ | |
| 495 | /*-----------------------------------------------------------*/ | |
| 496 | ||
| 497 | li r3, MSR_KERNEL /* Set ME and RI flags */ | |
| 498 | rlwimi r3, r5, 0, 25, 25 /* preserve IP bit set by HRCW */ | |
| 499 | #ifdef DEBUG | |
| 500 | rlwimi r3, r5, 0, 21, 22 /* debugger might set SE & BE bits */ | |
| 501 | #endif | |
| 502 | SYNC /* Some chip revs need this... */ | |
| 503 | mtmsr r3 | |
| 504 | SYNC | |
| 505 | mtspr SRR1, r3 /* Make SRR1 match MSR */ | |
| 506 | ||
| 507 | ||
| 6d0f6bcf | 508 | lis r3, CONFIG_SYS_IMMR@h |
| f046ccd1 | 509 | #if defined(CONFIG_WATCHDOG) |
| f6970d0c | 510 | /* Initialise the Watchdog values and reset it (if req) */ |
| f046ccd1 | 511 | /*------------------------------------------------------*/ |
| 6d0f6bcf | 512 | lis r4, CONFIG_SYS_WATCHDOG_VALUE |
| f046ccd1 EL |
513 | ori r4, r4, (SWCRR_SWEN | SWCRR_SWRI | SWCRR_SWPR) |
| 514 | stw r4, SWCRR(r3) | |
| de1d0a69 | 515 | |
| f046ccd1 | 516 | /* and reset it */ |
| de1d0a69 | 517 | |
| f046ccd1 EL |
518 | li r4, 0x556C |
| 519 | sth r4, SWSRR@l(r3) | |
| f6db9456 | 520 | li r4, -0x55C7 |
| f046ccd1 EL |
521 | sth r4, SWSRR@l(r3) |
| 522 | #else | |
| f6970d0c | 523 | /* Disable Watchdog */ |
| f046ccd1 | 524 | /*-------------------*/ |
| ec00c335 KG |
525 | lwz r4, SWCRR(r3) |
| 526 | /* Check to see if its enabled for disabling | |
| 527 | once disabled by SW you can't re-enable */ | |
| 528 | andi. r4, r4, 0x4 | |
| 529 | beq 1f | |
| f046ccd1 EL |
530 | xor r4, r4, r4 |
| 531 | stw r4, SWCRR(r3) | |
| ec00c335 | 532 | 1: |
| f046ccd1 EL |
533 | #endif /* CONFIG_WATCHDOG */ |
| 534 | ||
| 46497056 NS |
535 | #if defined(CONFIG_MASK_AER_AO) |
| 536 | /* Write the Arbiter Event Enable to mask Address Only traps. */ | |
| 537 | /* This prevents the dcbz instruction from being trapped when */ | |
| 538 | /* HID0_ABE Address Broadcast Enable is set and the MEMORY */ | |
| 539 | /* COHERENCY bit is set in the WIMG bits, which is often */ | |
| 540 | /* needed for PCI operation. */ | |
| 541 | lwz r4, 0x0808(r3) | |
| 542 | rlwinm r0, r4, 0, ~AER_AO | |
| 543 | stw r0, 0x0808(r3) | |
| 544 | #endif /* CONFIG_MASK_AER_AO */ | |
| 545 | ||
| f046ccd1 EL |
546 | /* Initialize the Hardware Implementation-dependent Registers */ |
| 547 | /* HID0 also contains cache control */ | |
| 6eb2a44e | 548 | /* - force invalidation of data and instruction caches */ |
| f046ccd1 EL |
549 | /*------------------------------------------------------*/ |
| 550 | ||
| 6d0f6bcf JCPV |
551 | lis r3, CONFIG_SYS_HID0_INIT@h |
| 552 | ori r3, r3, (CONFIG_SYS_HID0_INIT | HID0_ICFI | HID0_DCFI)@l | |
| f046ccd1 EL |
553 | SYNC |
| 554 | mtspr HID0, r3 | |
| 555 | ||
| 6d0f6bcf JCPV |
556 | lis r3, CONFIG_SYS_HID0_FINAL@h |
| 557 | ori r3, r3, (CONFIG_SYS_HID0_FINAL & ~(HID0_ICFI | HID0_DCFI))@l | |
| f046ccd1 EL |
558 | SYNC |
| 559 | mtspr HID0, r3 | |
| 560 | ||
| 6d0f6bcf JCPV |
561 | lis r3, CONFIG_SYS_HID2@h |
| 562 | ori r3, r3, CONFIG_SYS_HID2@l | |
| f046ccd1 EL |
563 | SYNC |
| 564 | mtspr HID2, r3 | |
| 565 | ||
| f046ccd1 EL |
566 | /* Done! */ |
| 567 | /*------------------------------*/ | |
| de1d0a69 | 568 | blr |
| f046ccd1 | 569 | |
| 2688e2f9 KG |
570 | /* setup_bats - set them up to some initial state */ |
| 571 | .globl setup_bats | |
| 572 | setup_bats: | |
| 573 | addis r0, r0, 0x0000 | |
| 574 | ||
| 575 | /* IBAT 0 */ | |
| 6d0f6bcf JCPV |
576 | addis r4, r0, CONFIG_SYS_IBAT0L@h |
| 577 | ori r4, r4, CONFIG_SYS_IBAT0L@l | |
| 578 | addis r3, r0, CONFIG_SYS_IBAT0U@h | |
| 579 | ori r3, r3, CONFIG_SYS_IBAT0U@l | |
| 2688e2f9 KG |
580 | mtspr IBAT0L, r4 |
| 581 | mtspr IBAT0U, r3 | |
| 2688e2f9 KG |
582 | |
| 583 | /* DBAT 0 */ | |
| 6d0f6bcf JCPV |
584 | addis r4, r0, CONFIG_SYS_DBAT0L@h |
| 585 | ori r4, r4, CONFIG_SYS_DBAT0L@l | |
| 586 | addis r3, r0, CONFIG_SYS_DBAT0U@h | |
| 587 | ori r3, r3, CONFIG_SYS_DBAT0U@l | |
| 2688e2f9 KG |
588 | mtspr DBAT0L, r4 |
| 589 | mtspr DBAT0U, r3 | |
| 2688e2f9 KG |
590 | |
| 591 | /* IBAT 1 */ | |
| 6d0f6bcf JCPV |
592 | addis r4, r0, CONFIG_SYS_IBAT1L@h |
| 593 | ori r4, r4, CONFIG_SYS_IBAT1L@l | |
| 594 | addis r3, r0, CONFIG_SYS_IBAT1U@h | |
| 595 | ori r3, r3, CONFIG_SYS_IBAT1U@l | |
| 2688e2f9 KG |
596 | mtspr IBAT1L, r4 |
| 597 | mtspr IBAT1U, r3 | |
| 2688e2f9 KG |
598 | |
| 599 | /* DBAT 1 */ | |
| 6d0f6bcf JCPV |
600 | addis r4, r0, CONFIG_SYS_DBAT1L@h |
| 601 | ori r4, r4, CONFIG_SYS_DBAT1L@l | |
| 602 | addis r3, r0, CONFIG_SYS_DBAT1U@h | |
| 603 | ori r3, r3, CONFIG_SYS_DBAT1U@l | |
| 2688e2f9 KG |
604 | mtspr DBAT1L, r4 |
| 605 | mtspr DBAT1U, r3 | |
| 2688e2f9 KG |
606 | |
| 607 | /* IBAT 2 */ | |
| 6d0f6bcf JCPV |
608 | addis r4, r0, CONFIG_SYS_IBAT2L@h |
| 609 | ori r4, r4, CONFIG_SYS_IBAT2L@l | |
| 610 | addis r3, r0, CONFIG_SYS_IBAT2U@h | |
| 611 | ori r3, r3, CONFIG_SYS_IBAT2U@l | |
| 2688e2f9 KG |
612 | mtspr IBAT2L, r4 |
| 613 | mtspr IBAT2U, r3 | |
| 2688e2f9 KG |
614 | |
| 615 | /* DBAT 2 */ | |
| 6d0f6bcf JCPV |
616 | addis r4, r0, CONFIG_SYS_DBAT2L@h |
| 617 | ori r4, r4, CONFIG_SYS_DBAT2L@l | |
| 618 | addis r3, r0, CONFIG_SYS_DBAT2U@h | |
| 619 | ori r3, r3, CONFIG_SYS_DBAT2U@l | |
| 2688e2f9 KG |
620 | mtspr DBAT2L, r4 |
| 621 | mtspr DBAT2U, r3 | |
| 2688e2f9 KG |
622 | |
| 623 | /* IBAT 3 */ | |
| 6d0f6bcf JCPV |
624 | addis r4, r0, CONFIG_SYS_IBAT3L@h |
| 625 | ori r4, r4, CONFIG_SYS_IBAT3L@l | |
| 626 | addis r3, r0, CONFIG_SYS_IBAT3U@h | |
| 627 | ori r3, r3, CONFIG_SYS_IBAT3U@l | |
| 2688e2f9 KG |
628 | mtspr IBAT3L, r4 |
| 629 | mtspr IBAT3U, r3 | |
| 2688e2f9 KG |
630 | |
| 631 | /* DBAT 3 */ | |
| 6d0f6bcf JCPV |
632 | addis r4, r0, CONFIG_SYS_DBAT3L@h |
| 633 | ori r4, r4, CONFIG_SYS_DBAT3L@l | |
| 634 | addis r3, r0, CONFIG_SYS_DBAT3U@h | |
| 635 | ori r3, r3, CONFIG_SYS_DBAT3U@l | |
| 2688e2f9 KG |
636 | mtspr DBAT3L, r4 |
| 637 | mtspr DBAT3U, r3 | |
| 2688e2f9 | 638 | |
| 31d82672 | 639 | #ifdef CONFIG_HIGH_BATS |
| 2688e2f9 | 640 | /* IBAT 4 */ |
| 6d0f6bcf JCPV |
641 | addis r4, r0, CONFIG_SYS_IBAT4L@h |
| 642 | ori r4, r4, CONFIG_SYS_IBAT4L@l | |
| 643 | addis r3, r0, CONFIG_SYS_IBAT4U@h | |
| 644 | ori r3, r3, CONFIG_SYS_IBAT4U@l | |
| 2688e2f9 KG |
645 | mtspr IBAT4L, r4 |
| 646 | mtspr IBAT4U, r3 | |
| 2688e2f9 KG |
647 | |
| 648 | /* DBAT 4 */ | |
| 6d0f6bcf JCPV |
649 | addis r4, r0, CONFIG_SYS_DBAT4L@h |
| 650 | ori r4, r4, CONFIG_SYS_DBAT4L@l | |
| 651 | addis r3, r0, CONFIG_SYS_DBAT4U@h | |
| 652 | ori r3, r3, CONFIG_SYS_DBAT4U@l | |
| 2688e2f9 KG |
653 | mtspr DBAT4L, r4 |
| 654 | mtspr DBAT4U, r3 | |
| 2688e2f9 KG |
655 | |
| 656 | /* IBAT 5 */ | |
| 6d0f6bcf JCPV |
657 | addis r4, r0, CONFIG_SYS_IBAT5L@h |
| 658 | ori r4, r4, CONFIG_SYS_IBAT5L@l | |
| 659 | addis r3, r0, CONFIG_SYS_IBAT5U@h | |
| 660 | ori r3, r3, CONFIG_SYS_IBAT5U@l | |
| 2688e2f9 KG |
661 | mtspr IBAT5L, r4 |
| 662 | mtspr IBAT5U, r3 | |
| 2688e2f9 KG |
663 | |
| 664 | /* DBAT 5 */ | |
| 6d0f6bcf JCPV |
665 | addis r4, r0, CONFIG_SYS_DBAT5L@h |
| 666 | ori r4, r4, CONFIG_SYS_DBAT5L@l | |
| 667 | addis r3, r0, CONFIG_SYS_DBAT5U@h | |
| 668 | ori r3, r3, CONFIG_SYS_DBAT5U@l | |
| 2688e2f9 KG |
669 | mtspr DBAT5L, r4 |
| 670 | mtspr DBAT5U, r3 | |
| 2688e2f9 KG |
671 | |
| 672 | /* IBAT 6 */ | |
| 6d0f6bcf JCPV |
673 | addis r4, r0, CONFIG_SYS_IBAT6L@h |
| 674 | ori r4, r4, CONFIG_SYS_IBAT6L@l | |
| 675 | addis r3, r0, CONFIG_SYS_IBAT6U@h | |
| 676 | ori r3, r3, CONFIG_SYS_IBAT6U@l | |
| 2688e2f9 KG |
677 | mtspr IBAT6L, r4 |
| 678 | mtspr IBAT6U, r3 | |
| 2688e2f9 KG |
679 | |
| 680 | /* DBAT 6 */ | |
| 6d0f6bcf JCPV |
681 | addis r4, r0, CONFIG_SYS_DBAT6L@h |
| 682 | ori r4, r4, CONFIG_SYS_DBAT6L@l | |
| 683 | addis r3, r0, CONFIG_SYS_DBAT6U@h | |
| 684 | ori r3, r3, CONFIG_SYS_DBAT6U@l | |
| 2688e2f9 KG |
685 | mtspr DBAT6L, r4 |
| 686 | mtspr DBAT6U, r3 | |
| 2688e2f9 KG |
687 | |
| 688 | /* IBAT 7 */ | |
| 6d0f6bcf JCPV |
689 | addis r4, r0, CONFIG_SYS_IBAT7L@h |
| 690 | ori r4, r4, CONFIG_SYS_IBAT7L@l | |
| 691 | addis r3, r0, CONFIG_SYS_IBAT7U@h | |
| 692 | ori r3, r3, CONFIG_SYS_IBAT7U@l | |
| 2688e2f9 KG |
693 | mtspr IBAT7L, r4 |
| 694 | mtspr IBAT7U, r3 | |
| 2688e2f9 KG |
695 | |
| 696 | /* DBAT 7 */ | |
| 6d0f6bcf JCPV |
697 | addis r4, r0, CONFIG_SYS_DBAT7L@h |
| 698 | ori r4, r4, CONFIG_SYS_DBAT7L@l | |
| 699 | addis r3, r0, CONFIG_SYS_DBAT7U@h | |
| 700 | ori r3, r3, CONFIG_SYS_DBAT7U@l | |
| 2688e2f9 KG |
701 | mtspr DBAT7L, r4 |
| 702 | mtspr DBAT7U, r3 | |
| 2688e2f9 KG |
703 | #endif |
| 704 | ||
| e4c09508 SW |
705 | isync |
| 706 | ||
| 707 | /* invalidate all tlb's | |
| 708 | * | |
| 709 | * From the 603e User Manual: "The 603e provides the ability to | |
| 710 | * invalidate a TLB entry. The TLB Invalidate Entry (tlbie) | |
| 711 | * instruction invalidates the TLB entry indexed by the EA, and | |
| 712 | * operates on both the instruction and data TLBs simultaneously | |
| 713 | * invalidating four TLB entries (both sets in each TLB). The | |
| 714 | * index corresponds to bits 15-19 of the EA. To invalidate all | |
| 715 | * entries within both TLBs, 32 tlbie instructions should be | |
| 716 | * issued, incrementing this field by one each time." | |
| 717 | * | |
| 718 | * "Note that the tlbia instruction is not implemented on the | |
| 719 | * 603e." | |
| 720 | * | |
| 721 | * bits 15-19 correspond to addresses 0x00000000 to 0x0001F000 | |
| 722 | * incrementing by 0x1000 each time. The code below is sort of | |
| a47a12be | 723 | * based on code in "flush_tlbs" from arch/powerpc/kernel/head.S |
| e4c09508 | 724 | * |
| 2688e2f9 KG |
725 | */ |
| 726 | lis r3, 0 | |
| 727 | lis r5, 2 | |
| 728 | ||
| 729 | 1: | |
| 730 | tlbie r3 | |
| 731 | addi r3, r3, 0x1000 | |
| 732 | cmp 0, 0, r3, r5 | |
| 733 | blt 1b | |
| 734 | ||
| 735 | blr | |
| 736 | ||
| f046ccd1 EL |
737 | /* Cache functions. |
| 738 | * | |
| 739 | * Note: requires that all cache bits in | |
| 740 | * HID0 are in the low half word. | |
| 741 | */ | |
| a4bfc4cc | 742 | #ifndef CONFIG_NAND_SPL |
| f046ccd1 EL |
743 | .globl icache_enable |
| 744 | icache_enable: | |
| 745 | mfspr r3, HID0 | |
| 746 | ori r3, r3, HID0_ICE | |
| 6eb2a44e | 747 | li r4, HID0_ICFI|HID0_ILOCK |
| f046ccd1 EL |
748 | andc r3, r3, r4 |
| 749 | ori r4, r3, HID0_ICFI | |
| 750 | isync | |
| 751 | mtspr HID0, r4 /* sets enable and invalidate, clears lock */ | |
| 752 | isync | |
| 753 | mtspr HID0, r3 /* clears invalidate */ | |
| 754 | blr | |
| 755 | ||
| 756 | .globl icache_disable | |
| 757 | icache_disable: | |
| 758 | mfspr r3, HID0 | |
| 759 | lis r4, 0 | |
| 6eb2a44e | 760 | ori r4, r4, HID0_ICE|HID0_ICFI|HID0_ILOCK |
| f046ccd1 | 761 | andc r3, r3, r4 |
| f046ccd1 | 762 | isync |
| 6eb2a44e | 763 | mtspr HID0, r3 /* clears invalidate, enable and lock */ |
| f046ccd1 EL |
764 | blr |
| 765 | ||
| 766 | .globl icache_status | |
| 767 | icache_status: | |
| 768 | mfspr r3, HID0 | |
| a7c66ad2 | 769 | rlwinm r3, r3, (31 - HID0_ICE_SHIFT + 1), 31, 31 |
| f046ccd1 | 770 | blr |
| a4bfc4cc | 771 | #endif /* !CONFIG_NAND_SPL */ |
| f046ccd1 EL |
772 | |
| 773 | .globl dcache_enable | |
| 774 | dcache_enable: | |
| 775 | mfspr r3, HID0 | |
| 2688e2f9 KG |
776 | li r5, HID0_DCFI|HID0_DLOCK |
| 777 | andc r3, r3, r5 | |
| 2688e2f9 | 778 | ori r3, r3, HID0_DCE |
| f046ccd1 | 779 | sync |
| 6eb2a44e | 780 | mtspr HID0, r3 /* enable, no invalidate */ |
| f046ccd1 EL |
781 | blr |
| 782 | ||
| 783 | .globl dcache_disable | |
| 784 | dcache_disable: | |
| 6eb2a44e NS |
785 | mflr r4 |
| 786 | bl flush_dcache /* uses r3 and r5 */ | |
| f046ccd1 | 787 | mfspr r3, HID0 |
| 6eb2a44e NS |
788 | li r5, HID0_DCE|HID0_DLOCK |
| 789 | andc r3, r3, r5 | |
| 790 | ori r5, r3, HID0_DCFI | |
| f046ccd1 | 791 | sync |
| 6eb2a44e | 792 | mtspr HID0, r5 /* sets invalidate, clears enable and lock */ |
| f046ccd1 EL |
793 | sync |
| 794 | mtspr HID0, r3 /* clears invalidate */ | |
| 6eb2a44e | 795 | mtlr r4 |
| f046ccd1 EL |
796 | blr |
| 797 | ||
| 798 | .globl dcache_status | |
| 799 | dcache_status: | |
| 800 | mfspr r3, HID0 | |
| a7c66ad2 | 801 | rlwinm r3, r3, (31 - HID0_DCE_SHIFT + 1), 31, 31 |
| f046ccd1 EL |
802 | blr |
| 803 | ||
| 6eb2a44e NS |
804 | .globl flush_dcache |
| 805 | flush_dcache: | |
| 806 | lis r3, 0 | |
| 6d0f6bcf | 807 | lis r5, CONFIG_SYS_CACHELINE_SIZE |
| 6eb2a44e NS |
808 | 1: cmp 0, 1, r3, r5 |
| 809 | bge 2f | |
| 810 | lwz r5, 0(r3) | |
| 6d0f6bcf | 811 | lis r5, CONFIG_SYS_CACHELINE_SIZE |
| 6eb2a44e NS |
812 | addi r3, r3, 0x4 |
| 813 | b 1b | |
| 814 | 2: blr | |
| 815 | ||
| f046ccd1 EL |
816 | /*-------------------------------------------------------------------*/ |
| 817 | ||
| 818 | /* | |
| 819 | * void relocate_code (addr_sp, gd, addr_moni) | |
| 820 | * | |
| 821 | * This "function" does not return, instead it continues in RAM | |
| 822 | * after relocating the monitor code. | |
| 823 | * | |
| 824 | * r3 = dest | |
| 825 | * r4 = src | |
| 826 | * r5 = length in bytes | |
| 827 | * r6 = cachelinesize | |
| 828 | */ | |
| 829 | .globl relocate_code | |
| 830 | relocate_code: | |
| 831 | mr r1, r3 /* Set new stack pointer */ | |
| 832 | mr r9, r4 /* Save copy of Global Data pointer */ | |
| 833 | mr r10, r5 /* Save copy of Destination Address */ | |
| 834 | ||
| 0f8aa159 | 835 | GET_GOT |
| f046ccd1 | 836 | mr r3, r5 /* Destination Address */ |
| 6d0f6bcf JCPV |
837 | lis r4, CONFIG_SYS_MONITOR_BASE@h /* Source Address */ |
| 838 | ori r4, r4, CONFIG_SYS_MONITOR_BASE@l | |
| e4c09508 | 839 | lwz r5, GOT(__bss_start) |
| f046ccd1 | 840 | sub r5, r5, r4 |
| 6d0f6bcf | 841 | li r6, CONFIG_SYS_CACHELINE_SIZE /* Cache Line Size */ |
| f046ccd1 EL |
842 | |
| 843 | /* | |
| 844 | * Fix GOT pointer: | |
| 845 | * | |
| 6d0f6bcf | 846 | * New GOT-PTR = (old GOT-PTR - CONFIG_SYS_MONITOR_BASE) |
| f046ccd1 EL |
847 | * + Destination Address |
| 848 | * | |
| 849 | * Offset: | |
| 850 | */ | |
| 851 | sub r15, r10, r4 | |
| 852 | ||
| 853 | /* First our own GOT */ | |
| 0f8aa159 | 854 | add r12, r12, r15 |
| f046ccd1 EL |
855 | /* then the one used by the C code */ |
| 856 | add r30, r30, r15 | |
| 857 | ||
| 858 | /* | |
| 859 | * Now relocate code | |
| 860 | */ | |
| 861 | ||
| 862 | cmplw cr1,r3,r4 | |
| 863 | addi r0,r5,3 | |
| 864 | srwi. r0,r0,2 | |
| 865 | beq cr1,4f /* In place copy is not necessary */ | |
| 866 | beq 7f /* Protect against 0 count */ | |
| 867 | mtctr r0 | |
| 868 | bge cr1,2f | |
| 869 | la r8,-4(r4) | |
| 870 | la r7,-4(r3) | |
| 871 | ||
| 872 | /* copy */ | |
| 873 | 1: lwzu r0,4(r8) | |
| 874 | stwu r0,4(r7) | |
| 875 | bdnz 1b | |
| 876 | ||
| 877 | addi r0,r5,3 | |
| 878 | srwi. r0,r0,2 | |
| 879 | mtctr r0 | |
| 880 | la r8,-4(r4) | |
| 881 | la r7,-4(r3) | |
| de1d0a69 JL |
882 | |
| 883 | /* and compare */ | |
| f046ccd1 EL |
884 | 20: lwzu r20,4(r8) |
| 885 | lwzu r21,4(r7) | |
| 886 | xor. r22, r20, r21 | |
| 887 | bne 30f | |
| 888 | bdnz 20b | |
| 889 | b 4f | |
| 890 | ||
| 891 | /* compare failed */ | |
| 892 | 30: li r3, 0 | |
| 893 | blr | |
| 894 | ||
| 895 | 2: slwi r0,r0,2 /* re copy in reverse order ... y do we needed it? */ | |
| 896 | add r8,r4,r0 | |
| 897 | add r7,r3,r0 | |
| 898 | 3: lwzu r0,-4(r8) | |
| 899 | stwu r0,-4(r7) | |
| 900 | bdnz 3b | |
| f046ccd1 EL |
901 | |
| 902 | /* | |
| 903 | * Now flush the cache: note that we must start from a cache aligned | |
| 904 | * address. Otherwise we might miss one cache line. | |
| 905 | */ | |
| 2688e2f9 | 906 | 4: cmpwi r6,0 |
| f046ccd1 | 907 | add r5,r3,r5 |
| 2688e2f9 | 908 | beq 7f /* Always flush prefetch queue in any case */ |
| f046ccd1 EL |
909 | subi r0,r6,1 |
| 910 | andc r3,r3,r0 | |
| f046ccd1 EL |
911 | mr r4,r3 |
| 912 | 5: dcbst 0,r4 | |
| 913 | add r4,r4,r6 | |
| 914 | cmplw r4,r5 | |
| 915 | blt 5b | |
| 2688e2f9 | 916 | sync /* Wait for all dcbst to complete on bus */ |
| f046ccd1 EL |
917 | mr r4,r3 |
| 918 | 6: icbi 0,r4 | |
| 919 | add r4,r4,r6 | |
| 920 | cmplw r4,r5 | |
| 921 | blt 6b | |
| 2688e2f9 | 922 | 7: sync /* Wait for all icbi to complete on bus */ |
| f046ccd1 EL |
923 | isync |
| 924 | ||
| 925 | /* | |
| 926 | * We are done. Do not return, instead branch to second part of board | |
| 927 | * initialization, now running from RAM. | |
| 928 | */ | |
| f046ccd1 EL |
929 | addi r0, r10, in_ram - _start + EXC_OFF_SYS_RESET |
| 930 | mtlr r0 | |
| 931 | blr | |
| 932 | ||
| 933 | in_ram: | |
| 934 | ||
| 935 | /* | |
| 0f8aa159 | 936 | * Relocation Function, r12 point to got2+0x8000 |
| f046ccd1 EL |
937 | * |
| 938 | * Adjust got2 pointers, no need to check for 0, this code | |
| 939 | * already puts a few entries in the table. | |
| 940 | */ | |
| 941 | li r0,__got2_entries@sectoff@l | |
| 942 | la r3,GOT(_GOT2_TABLE_) | |
| 943 | lwz r11,GOT(_GOT2_TABLE_) | |
| 944 | mtctr r0 | |
| 945 | sub r11,r3,r11 | |
| 946 | addi r3,r3,-4 | |
| 947 | 1: lwzu r0,4(r3) | |
| afc3ba0f JT |
948 | cmpwi r0,0 |
| 949 | beq- 2f | |
| f046ccd1 EL |
950 | add r0,r0,r11 |
| 951 | stw r0,0(r3) | |
| afc3ba0f | 952 | 2: bdnz 1b |
| f046ccd1 | 953 | |
| e4c09508 | 954 | #ifndef CONFIG_NAND_SPL |
| f046ccd1 EL |
955 | /* |
| 956 | * Now adjust the fixups and the pointers to the fixups | |
| 957 | * in case we need to move ourselves again. | |
| 958 | */ | |
| afc3ba0f | 959 | li r0,__fixup_entries@sectoff@l |
| f046ccd1 EL |
960 | lwz r3,GOT(_FIXUP_TABLE_) |
| 961 | cmpwi r0,0 | |
| 962 | mtctr r0 | |
| 963 | addi r3,r3,-4 | |
| 964 | beq 4f | |
| 965 | 3: lwzu r4,4(r3) | |
| 966 | lwzux r0,r4,r11 | |
| 967 | add r0,r0,r11 | |
| 968 | stw r10,0(r3) | |
| 969 | stw r0,0(r4) | |
| 970 | bdnz 3b | |
| 971 | 4: | |
| e4c09508 SW |
972 | #endif |
| 973 | ||
| f046ccd1 EL |
974 | clear_bss: |
| 975 | /* | |
| 976 | * Now clear BSS segment | |
| 977 | */ | |
| 978 | lwz r3,GOT(__bss_start) | |
| 979 | #if defined(CONFIG_HYMOD) | |
| 980 | /* | |
| 981 | * For HYMOD - the environment is the very last item in flash. | |
| 982 | * The real .bss stops just before environment starts, so only | |
| 983 | * clear up to that point. | |
| 984 | * | |
| 985 | * taken from mods for FADS board | |
| 986 | */ | |
| 987 | lwz r4,GOT(environment) | |
| 988 | #else | |
| 989 | lwz r4,GOT(_end) | |
| 990 | #endif | |
| 991 | ||
| 992 | cmplw 0, r3, r4 | |
| 993 | beq 6f | |
| 994 | ||
| 995 | li r0, 0 | |
| 996 | 5: | |
| 997 | stw r0, 0(r3) | |
| 998 | addi r3, r3, 4 | |
| 999 | cmplw 0, r3, r4 | |
| 1000 | bne 5b | |
| 1001 | 6: | |
| 1002 | ||
| 1003 | mr r3, r9 /* Global Data pointer */ | |
| 1004 | mr r4, r10 /* Destination Address */ | |
| 1005 | bl board_init_r | |
| 1006 | ||
| e4c09508 | 1007 | #ifndef CONFIG_NAND_SPL |
| f046ccd1 EL |
1008 | /* |
| 1009 | * Copy exception vector code to low memory | |
| 1010 | * | |
| 1011 | * r3: dest_addr | |
| 1012 | * r7: source address, r8: end address, r9: target address | |
| 1013 | */ | |
| 1014 | .globl trap_init | |
| 1015 | trap_init: | |
| 0f8aa159 JT |
1016 | mflr r4 /* save link register */ |
| 1017 | GET_GOT | |
| f046ccd1 EL |
1018 | lwz r7, GOT(_start) |
| 1019 | lwz r8, GOT(_end_of_vectors) | |
| 1020 | ||
| 1021 | li r9, 0x100 /* reset vector always at 0x100 */ | |
| 1022 | ||
| 1023 | cmplw 0, r7, r8 | |
| 1024 | bgelr /* return if r7>=r8 - just in case */ | |
| f046ccd1 EL |
1025 | 1: |
| 1026 | lwz r0, 0(r7) | |
| 1027 | stw r0, 0(r9) | |
| 1028 | addi r7, r7, 4 | |
| 1029 | addi r9, r9, 4 | |
| 1030 | cmplw 0, r7, r8 | |
| 1031 | bne 1b | |
| 1032 | ||
| 1033 | /* | |
| 1034 | * relocate `hdlr' and `int_return' entries | |
| 1035 | */ | |
| 1036 | li r7, .L_MachineCheck - _start + EXC_OFF_SYS_RESET | |
| 1037 | li r8, Alignment - _start + EXC_OFF_SYS_RESET | |
| 1038 | 2: | |
| 1039 | bl trap_reloc | |
| 1040 | addi r7, r7, 0x100 /* next exception vector */ | |
| 1041 | cmplw 0, r7, r8 | |
| 1042 | blt 2b | |
| 1043 | ||
| 1044 | li r7, .L_Alignment - _start + EXC_OFF_SYS_RESET | |
| 1045 | bl trap_reloc | |
| 1046 | ||
| 1047 | li r7, .L_ProgramCheck - _start + EXC_OFF_SYS_RESET | |
| 1048 | bl trap_reloc | |
| 1049 | ||
| 1050 | li r7, .L_FPUnavailable - _start + EXC_OFF_SYS_RESET | |
| 1051 | li r8, SystemCall - _start + EXC_OFF_SYS_RESET | |
| 1052 | 3: | |
| 1053 | bl trap_reloc | |
| 1054 | addi r7, r7, 0x100 /* next exception vector */ | |
| 1055 | cmplw 0, r7, r8 | |
| 1056 | blt 3b | |
| 1057 | ||
| 1058 | li r7, .L_SingleStep - _start + EXC_OFF_SYS_RESET | |
| 1059 | li r8, _end_of_vectors - _start + EXC_OFF_SYS_RESET | |
| 1060 | 4: | |
| 1061 | bl trap_reloc | |
| 1062 | addi r7, r7, 0x100 /* next exception vector */ | |
| 1063 | cmplw 0, r7, r8 | |
| 1064 | blt 4b | |
| 1065 | ||
| 1066 | mfmsr r3 /* now that the vectors have */ | |
| 1067 | lis r7, MSR_IP@h /* relocated into low memory */ | |
| 1068 | ori r7, r7, MSR_IP@l /* MSR[IP] can be turned off */ | |
| 1069 | andc r3, r3, r7 /* (if it was on) */ | |
| 1070 | SYNC /* Some chip revs need this... */ | |
| 1071 | mtmsr r3 | |
| 1072 | SYNC | |
| 1073 | ||
| 1074 | mtlr r4 /* restore link register */ | |
| 1075 | blr | |
| 1076 | ||
| e4c09508 | 1077 | #endif /* !CONFIG_NAND_SPL */ |
| f046ccd1 | 1078 | |
| 6d0f6bcf | 1079 | #ifdef CONFIG_SYS_INIT_RAM_LOCK |
| 2688e2f9 KG |
1080 | lock_ram_in_cache: |
| 1081 | /* Allocate Initial RAM in data cache. | |
| 1082 | */ | |
| 6d0f6bcf JCPV |
1083 | lis r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@h |
| 1084 | ori r3, r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@l | |
| 1085 | li r4, ((CONFIG_SYS_INIT_RAM_END & ~31) + \ | |
| 1086 | (CONFIG_SYS_INIT_RAM_ADDR & 31) + 31) / 32 | |
| ade50c7f | 1087 | mtctr r4 |
| 2688e2f9 KG |
1088 | 1: |
| 1089 | dcbz r0, r3 | |
| 1090 | addi r3, r3, 32 | |
| 1091 | bdnz 1b | |
| 1092 | ||
| 1093 | /* Lock the data cache */ | |
| 1094 | mfspr r0, HID0 | |
| 6eb2a44e | 1095 | ori r0, r0, HID0_DLOCK |
| 2688e2f9 KG |
1096 | sync |
| 1097 | mtspr HID0, r0 | |
| 1098 | sync | |
| 1099 | blr | |
| 1100 | ||
| e4c09508 | 1101 | #ifndef CONFIG_NAND_SPL |
| f046ccd1 EL |
1102 | .globl unlock_ram_in_cache |
| 1103 | unlock_ram_in_cache: | |
| 1104 | /* invalidate the INIT_RAM section */ | |
| 6d0f6bcf JCPV |
1105 | lis r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@h |
| 1106 | ori r3, r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@l | |
| 1107 | li r4, ((CONFIG_SYS_INIT_RAM_END & ~31) + \ | |
| 1108 | (CONFIG_SYS_INIT_RAM_ADDR & 31) + 31) / 32 | |
| ade50c7f | 1109 | mtctr r4 |
| f046ccd1 EL |
1110 | 1: icbi r0, r3 |
| 1111 | dcbi r0, r3 | |
| 1112 | addi r3, r3, 32 | |
| 1113 | bdnz 1b | |
| 1114 | sync /* Wait for all icbi to complete on bus */ | |
| 1115 | isync | |
| 2688e2f9 KG |
1116 | |
| 1117 | /* Unlock the data cache and invalidate it */ | |
| 1118 | mfspr r3, HID0 | |
| 1119 | li r5, HID0_DLOCK|HID0_DCFI | |
| 1120 | andc r3, r3, r5 /* no invalidate, unlock */ | |
| 1121 | ori r5, r3, HID0_DCFI /* invalidate, unlock */ | |
| 6eb2a44e | 1122 | sync |
| 2688e2f9 | 1123 | mtspr HID0, r5 /* invalidate, unlock */ |
| 2688e2f9 | 1124 | sync |
| 6eb2a44e | 1125 | mtspr HID0, r3 /* no invalidate, unlock */ |
| f046ccd1 | 1126 | blr |
| e4c09508 | 1127 | #endif /* !CONFIG_NAND_SPL */ |
| 6d0f6bcf | 1128 | #endif /* CONFIG_SYS_INIT_RAM_LOCK */ |
| f046ccd1 | 1129 | |
| 6d0f6bcf | 1130 | #ifdef CONFIG_SYS_FLASHBOOT |
| f046ccd1 EL |
1131 | map_flash_by_law1: |
| 1132 | /* When booting from ROM (Flash or EPROM), clear the */ | |
| 1133 | /* Address Mask in OR0 so ROM appears everywhere */ | |
| 1134 | /*----------------------------------------------------*/ | |
| 6d0f6bcf | 1135 | lis r3, (CONFIG_SYS_IMMR)@h /* r3 <= CONFIG_SYS_IMMR */ |
| de1d0a69 | 1136 | lwz r4, OR0@l(r3) |
| f046ccd1 | 1137 | li r5, 0x7fff /* r5 <= 0x00007FFFF */ |
| de1d0a69 | 1138 | and r4, r4, r5 |
| f046ccd1 EL |
1139 | stw r4, OR0@l(r3) /* OR0 <= OR0 & 0x00007FFFF */ |
| 1140 | ||
| 1141 | /* As MPC8349E User's Manual presented, when RCW[BMS] is set to 0, | |
| 1142 | * system will boot from 0x0000_0100, and the LBLAWBAR0[BASE_ADDR] | |
| 1143 | * reset value is 0x00000; when RCW[BMS] is set to 1, system will boot | |
| 1144 | * from 0xFFF0_0100, and the LBLAWBAR0[BASE_ADDR] reset value is | |
| 1145 | * 0xFF800. From the hard resetting to here, the processor fetched and | |
| 1146 | * executed the instructions one by one. There is not absolutely | |
| 1147 | * jumping happened. Laterly, the u-boot code has to do an absolutely | |
| 1148 | * jumping to tell the CPU instruction fetching component what the | |
| 1149 | * u-boot TEXT base address is. Because the TEXT base resides in the | |
| 1150 | * boot ROM memory space, to garantee the code can run smoothly after | |
| 1151 | * that jumping, we must map in the entire boot ROM by Local Access | |
| 1152 | * Window. Sometimes, we desire an non-0x00000 or non-0xFF800 starting | |
| 1153 | * address for boot ROM, such as 0xFE000000. In this case, the default | |
| 1154 | * LBIU Local Access Widow 0 will not cover this memory space. So, we | |
| 1155 | * need another window to map in it. | |
| 1156 | */ | |
| 6d0f6bcf JCPV |
1157 | lis r4, (CONFIG_SYS_FLASH_BASE)@h |
| 1158 | ori r4, r4, (CONFIG_SYS_FLASH_BASE)@l | |
| 1159 | stw r4, LBLAWBAR1(r3) /* LBLAWBAR1 <= CONFIG_SYS_FLASH_BASE */ | |
| 31068b7c | 1160 | |
| 6d0f6bcf | 1161 | /* Store 0x80000012 + log2(CONFIG_SYS_FLASH_SIZE) into LBLAWAR1 */ |
| 31068b7c TT |
1162 | lis r4, (0x80000012)@h |
| 1163 | ori r4, r4, (0x80000012)@l | |
| 6d0f6bcf | 1164 | li r5, CONFIG_SYS_FLASH_SIZE |
| 31068b7c TT |
1165 | 1: srawi. r5, r5, 1 /* r5 = r5 >> 1 */ |
| 1166 | addi r4, r4, 1 | |
| 1167 | bne 1b | |
| 1168 | ||
| f046ccd1 EL |
1169 | stw r4, LBLAWAR1(r3) /* LBLAWAR1 <= 8MB Flash Size */ |
| 1170 | blr | |
| 1171 | ||
| 1172 | /* Though all the LBIU Local Access Windows and LBC Banks will be | |
| 1173 | * initialized in the C code, we'd better configure boot ROM's | |
| 1174 | * window 0 and bank 0 correctly at here. | |
| 1175 | */ | |
| 1176 | remap_flash_by_law0: | |
| 1177 | /* Initialize the BR0 with the boot ROM starting address. */ | |
| 1178 | lwz r4, BR0(r3) | |
| 1179 | li r5, 0x7FFF | |
| de1d0a69 | 1180 | and r4, r4, r5 |
| 6d0f6bcf JCPV |
1181 | lis r5, (CONFIG_SYS_FLASH_BASE & 0xFFFF8000)@h |
| 1182 | ori r5, r5, (CONFIG_SYS_FLASH_BASE & 0xFFFF8000)@l | |
| f046ccd1 | 1183 | or r5, r5, r4 |
| 6d0f6bcf | 1184 | stw r5, BR0(r3) /* r5 <= (CONFIG_SYS_FLASH_BASE & 0xFFFF8000) | (BR0 & 0x00007FFF) */ |
| f046ccd1 EL |
1185 | |
| 1186 | lwz r4, OR0(r3) | |
| 6d0f6bcf | 1187 | lis r5, ~((CONFIG_SYS_FLASH_SIZE << 4) - 1) |
| f046ccd1 | 1188 | or r4, r4, r5 |
| 31068b7c | 1189 | stw r4, OR0(r3) |
| f046ccd1 | 1190 | |
| 6d0f6bcf JCPV |
1191 | lis r4, (CONFIG_SYS_FLASH_BASE)@h |
| 1192 | ori r4, r4, (CONFIG_SYS_FLASH_BASE)@l | |
| 1193 | stw r4, LBLAWBAR0(r3) /* LBLAWBAR0 <= CONFIG_SYS_FLASH_BASE */ | |
| f046ccd1 | 1194 | |
| 6d0f6bcf | 1195 | /* Store 0x80000012 + log2(CONFIG_SYS_FLASH_SIZE) into LBLAWAR0 */ |
| 31068b7c TT |
1196 | lis r4, (0x80000012)@h |
| 1197 | ori r4, r4, (0x80000012)@l | |
| 6d0f6bcf | 1198 | li r5, CONFIG_SYS_FLASH_SIZE |
| 31068b7c TT |
1199 | 1: srawi. r5, r5, 1 /* r5 = r5 >> 1 */ |
| 1200 | addi r4, r4, 1 | |
| 1201 | bne 1b | |
| 1202 | stw r4, LBLAWAR0(r3) /* LBLAWAR0 <= Flash Size */ | |
| 1203 | ||
| f046ccd1 EL |
1204 | |
| 1205 | xor r4, r4, r4 | |
| 1206 | stw r4, LBLAWBAR1(r3) | |
| 1207 | stw r4, LBLAWAR1(r3) /* Off LBIU LAW1 */ | |
| 1208 | blr | |
| 6d0f6bcf | 1209 | #endif /* CONFIG_SYS_FLASHBOOT */ |