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 | 6 | * |
| 1a459660 | 7 | * SPDX-License-Identifier: GPL-2.0+ |
| f046ccd1 EL |
8 | */ |
| 9 | ||
| 10 | /* | |
| 11 | * U-Boot - Startup Code for MPC83xx PowerPC based Embedded Boards | |
| 12 | */ | |
| 13 | ||
| 25ddd1fb | 14 | #include <asm-offsets.h> |
| f046ccd1 | 15 | #include <config.h> |
| de1d0a69 | 16 | #include <mpc83xx.h> |
| f046ccd1 EL |
17 | #include <version.h> |
| 18 | ||
| 19 | #define CONFIG_83XX 1 /* needed for Linux kernel header files*/ | |
| f046ccd1 EL |
20 | |
| 21 | #include <ppc_asm.tmpl> | |
| 22 | #include <ppc_defs.h> | |
| 23 | ||
| 24 | #include <asm/cache.h> | |
| 25 | #include <asm/mmu.h> | |
| d98b0523 | 26 | #include <asm/u-boot.h> |
| f046ccd1 | 27 | |
| f046ccd1 EL |
28 | /* We don't want the MMU yet. |
| 29 | */ | |
| 30 | #undef MSR_KERNEL | |
| 31 | ||
| 32 | /* | |
| 33 | * Floating Point enable, Machine Check and Recoverable Interr. | |
| 34 | */ | |
| 35 | #ifdef DEBUG | |
| 36 | #define MSR_KERNEL (MSR_FP|MSR_RI) | |
| 37 | #else | |
| 38 | #define MSR_KERNEL (MSR_FP|MSR_ME|MSR_RI) | |
| 39 | #endif | |
| 40 | ||
| 06f60ae3 SW |
41 | #if defined(CONFIG_NAND_SPL) || \ |
| 42 | (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_INIT_MINIMAL)) | |
| 43 | #define MINIMAL_SPL | |
| 44 | #endif | |
| 45 | ||
| 46 | #if !defined(CONFIG_SPL_BUILD) && !defined(CONFIG_NAND_SPL) && \ | |
| 47 | !defined(CONFIG_SYS_RAMBOOT) | |
| 6d0f6bcf | 48 | #define CONFIG_SYS_FLASHBOOT |
| e4c09508 SW |
49 | #endif |
| 50 | ||
| f046ccd1 EL |
51 | /* |
| 52 | * Set up GOT: Global Offset Table | |
| 53 | * | |
| 0f8aa159 | 54 | * Use r12 to access the GOT |
| f046ccd1 EL |
55 | */ |
| 56 | START_GOT | |
| 57 | GOT_ENTRY(_GOT2_TABLE_) | |
| e4c09508 | 58 | GOT_ENTRY(__bss_start) |
| 3929fb0a | 59 | GOT_ENTRY(__bss_end) |
| f046ccd1 | 60 | |
| 06f60ae3 | 61 | #ifndef MINIMAL_SPL |
| e4c09508 | 62 | GOT_ENTRY(_FIXUP_TABLE_) |
| f046ccd1 EL |
63 | GOT_ENTRY(_start) |
| 64 | GOT_ENTRY(_start_of_vectors) | |
| 65 | GOT_ENTRY(_end_of_vectors) | |
| 66 | GOT_ENTRY(transfer_to_handler) | |
| e4c09508 | 67 | #endif |
| f046ccd1 EL |
68 | END_GOT |
| 69 | ||
| 70 | /* | |
| f35f3582 JVB |
71 | * The Hard Reset Configuration Word (HRCW) table is in the first 64 |
| 72 | * (0x40) bytes of flash. It has 8 bytes, but each byte is repeated 8 | |
| 73 | * times so the processor can fetch it out of flash whether the flash | |
| 74 | * is 8, 16, 32, or 64 bits wide (hardware trickery). | |
| f046ccd1 | 75 | */ |
| f046ccd1 EL |
76 | .text |
| 77 | #define _HRCW_TABLE_ENTRY(w) \ | |
| 78 | .fill 8,1,(((w)>>24)&0xff); \ | |
| 79 | .fill 8,1,(((w)>>16)&0xff); \ | |
| 80 | .fill 8,1,(((w)>> 8)&0xff); \ | |
| 81 | .fill 8,1,(((w) )&0xff) | |
| 82 | ||
| 6d0f6bcf JCPV |
83 | _HRCW_TABLE_ENTRY(CONFIG_SYS_HRCW_LOW) |
| 84 | _HRCW_TABLE_ENTRY(CONFIG_SYS_HRCW_HIGH) | |
| f046ccd1 | 85 | |
| f35f3582 JVB |
86 | /* |
| 87 | * Magic number and version string - put it after the HRCW since it | |
| 88 | * cannot be first in flash like it is in many other processors. | |
| 89 | */ | |
| 90 | .long 0x27051956 /* U-Boot Magic Number */ | |
| 91 | ||
| 92 | .globl version_string | |
| 93 | version_string: | |
| 09c2e90c | 94 | .ascii U_BOOT_VERSION_STRING, "\0" |
| f35f3582 | 95 | |
| 455a4691 RM |
96 | .align 2 |
| 97 | ||
| 98 | .globl enable_addr_trans | |
| 99 | enable_addr_trans: | |
| 100 | /* enable address translation */ | |
| 101 | mfmsr r5 | |
| 102 | ori r5, r5, (MSR_IR | MSR_DR) | |
| 103 | mtmsr r5 | |
| 104 | isync | |
| 105 | blr | |
| 106 | ||
| 107 | .globl disable_addr_trans | |
| 108 | disable_addr_trans: | |
| 109 | /* disable address translation */ | |
| 110 | mflr r4 | |
| 111 | mfmsr r3 | |
| 112 | andi. r0, r3, (MSR_IR | MSR_DR) | |
| 113 | beqlr | |
| 114 | andc r3, r3, r0 | |
| 115 | mtspr SRR0, r4 | |
| 116 | mtspr SRR1, r3 | |
| 117 | rfi | |
| 118 | ||
| 3f283f4b RM |
119 | .globl get_svr |
| 120 | get_svr: | |
| 121 | mfspr r3, SVR | |
| 122 | blr | |
| 123 | ||
| 455a4691 RM |
124 | .globl get_pvr |
| 125 | get_pvr: | |
| 126 | mfspr r3, PVR | |
| 127 | blr | |
| 128 | ||
| 129 | .globl ppcDWstore | |
| 130 | ppcDWstore: | |
| 131 | lfd 1, 0(r4) | |
| 132 | stfd 1, 0(r3) | |
| 133 | blr | |
| 134 | ||
| 135 | .globl ppcDWload | |
| 136 | ppcDWload: | |
| 137 | lfd 1, 0(r3) | |
| 138 | stfd 1, 0(r4) | |
| 139 | blr | |
| f046ccd1 | 140 | |
| f046ccd1 EL |
141 | #ifndef CONFIG_DEFAULT_IMMR |
| 142 | #error CONFIG_DEFAULT_IMMR must be defined | |
| 6d0f6bcf JCPV |
143 | #endif /* CONFIG_SYS_DEFAULT_IMMR */ |
| 144 | #ifndef CONFIG_SYS_IMMR | |
| 145 | #define CONFIG_SYS_IMMR CONFIG_DEFAULT_IMMR | |
| 146 | #endif /* CONFIG_SYS_IMMR */ | |
| f046ccd1 EL |
147 | |
| 148 | /* | |
| 149 | * After configuration, a system reset exception is executed using the | |
| 150 | * vector at offset 0x100 relative to the base set by MSR[IP]. If | |
| 151 | * MSR[IP] is 0, the base address is 0x00000000. If MSR[IP] is 1, the | |
| 152 | * base address is 0xfff00000. In the case of a Power On Reset or Hard | |
| 153 | * Reset, the value of MSR[IP] is determined by the CIP field in the | |
| 154 | * HRCW. | |
| 155 | * | |
| 156 | * Other bits in the HRCW set up the Base Address and Port Size in BR0. | |
| 157 | * This determines the location of the boot ROM (flash or EPROM) in the | |
| 158 | * processor's address space at boot time. As long as the HRCW is set up | |
| 159 | * so that we eventually end up executing the code below when the | |
| 160 | * processor executes the reset exception, the actual values used should | |
| 161 | * not matter. | |
| 162 | * | |
| 163 | * Once we have got here, the address mask in OR0 is cleared so that the | |
| 164 | * bottom 32K of the boot ROM is effectively repeated all throughout the | |
| 165 | * processor's address space, after which we can jump to the absolute | |
| 166 | * address at which the boot ROM was linked at compile time, and proceed | |
| 167 | * to initialise the memory controller without worrying if the rug will | |
| 168 | * be pulled out from under us, so to speak (it will be fine as long as | |
| 169 | * we configure BR0 with the same boot ROM link address). | |
| 170 | */ | |
| 171 | . = EXC_OFF_SYS_RESET | |
| 172 | ||
| 173 | .globl _start | |
| 174 | _start: /* time t 0 */ | |
| f046ccd1 EL |
175 | lis r4, CONFIG_DEFAULT_IMMR@h |
| 176 | nop | |
| 52ebd9c1 | 177 | |
| f046ccd1 | 178 | mfmsr r5 /* save msr contents */ |
| 66778761 SW |
179 | |
| 180 | /* 83xx manuals prescribe a specific sequence for updating IMMRBAR. */ | |
| 181 | bl 1f | |
| 182 | 1: mflr r7 | |
| 183 | ||
| 6d0f6bcf JCPV |
184 | lis r3, CONFIG_SYS_IMMR@h |
| 185 | ori r3, r3, CONFIG_SYS_IMMR@l | |
| 66778761 SW |
186 | |
| 187 | lwz r6, IMMRBAR(r4) | |
| 188 | isync | |
| 189 | ||
| f046ccd1 | 190 | stw r3, IMMRBAR(r4) |
| 66778761 SW |
191 | lwz r6, 0(r7) /* Arbitrary external load */ |
| 192 | isync | |
| 193 | ||
| 194 | lwz r6, IMMRBAR(r3) | |
| 195 | isync | |
| de1d0a69 | 196 | |
| f046ccd1 EL |
197 | /* Initialise the E300 processor core */ |
| 198 | /*------------------------------------------*/ | |
| de1d0a69 | 199 | |
| 06f60ae3 SW |
200 | #if (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_MPC83XX_WAIT_FOR_NAND)) || \ |
| 201 | defined(CONFIG_NAND_SPL) | |
| fa7b1c07 LS |
202 | /* The FCM begins execution after only the first page |
| 203 | * is loaded. Wait for the rest before branching | |
| 204 | * to another flash page. | |
| 205 | */ | |
| 66778761 | 206 | 1: lwz r6, 0x50b0(r3) |
| fa7b1c07 LS |
207 | andi. r6, r6, 1 |
| 208 | beq 1b | |
| 209 | #endif | |
| 210 | ||
| f046ccd1 | 211 | bl init_e300_core |
| de1d0a69 | 212 | |
| 6d0f6bcf | 213 | #ifdef CONFIG_SYS_FLASHBOOT |
| f046ccd1 EL |
214 | |
| 215 | /* Inflate flash location so it appears everywhere, calculate */ | |
| 216 | /* the absolute address in final location of the FLASH, jump */ | |
| 217 | /* there and deflate the flash size back to minimal size */ | |
| 218 | /*------------------------------------------------------------*/ | |
| 219 | bl map_flash_by_law1 | |
| 6d0f6bcf JCPV |
220 | lis r4, (CONFIG_SYS_MONITOR_BASE)@h |
| 221 | ori r4, r4, (CONFIG_SYS_MONITOR_BASE)@l | |
| f046ccd1 EL |
222 | addi r5, r4, in_flash - _start + EXC_OFF_SYS_RESET |
| 223 | mtlr r5 | |
| 224 | blr | |
| 225 | in_flash: | |
| 226 | #if 1 /* Remapping flash with LAW0. */ | |
| 227 | bl remap_flash_by_law0 | |
| 228 | #endif | |
| 6d0f6bcf | 229 | #endif /* CONFIG_SYS_FLASHBOOT */ |
| f046ccd1 | 230 | |
| 2688e2f9 KG |
231 | /* setup the bats */ |
| 232 | bl setup_bats | |
| 233 | sync | |
| 234 | ||
| 235 | /* | |
| 236 | * Cache must be enabled here for stack-in-cache trick. | |
| 237 | * This means we need to enable the BATS. | |
| 238 | * This means: | |
| 239 | * 1) for the EVB, original gt regs need to be mapped | |
| 240 | * 2) need to have an IBAT for the 0xf region, | |
| 241 | * we are running there! | |
| 242 | * Cache should be turned on after BATs, since by default | |
| 243 | * everything is write-through. | |
| 244 | * The init-mem BAT can be reused after reloc. The old | |
| 245 | * gt-regs BAT can be reused after board_init_f calls | |
| 246 | * board_early_init_f (EVB only). | |
| 247 | */ | |
| 248 | /* enable address translation */ | |
| 249 | bl enable_addr_trans | |
| 250 | sync | |
| 251 | ||
| 6eb2a44e | 252 | /* enable the data cache */ |
| 2688e2f9 KG |
253 | bl dcache_enable |
| 254 | sync | |
| 6d0f6bcf | 255 | #ifdef CONFIG_SYS_INIT_RAM_LOCK |
| 2688e2f9 KG |
256 | bl lock_ram_in_cache |
| 257 | sync | |
| 258 | #endif | |
| 259 | ||
| 260 | /* set up the stack pointer in our newly created | |
| e80311a5 | 261 | * cache-ram; use r3 to keep the new SP for now to |
| 262 | * avoid overiding the SP it uselessly */ | |
| 263 | lis r3, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET)@h | |
| 264 | ori r3, r3, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET)@l | |
| 2688e2f9 | 265 | |
| dbcb2c0e | 266 | /* r4 = end of GD area */ |
| 267 | addi r4, r3, GENERATED_GBL_DATA_SIZE | |
| 268 | ||
| 269 | /* Zero GD area */ | |
| 270 | li r0, 0 | |
| 271 | 1: | |
| 272 | subi r4, r4, 1 | |
| 273 | stb r0, 0(r4) | |
| 274 | cmplw r3, r4 | |
| 275 | bne 1b | |
| 276 | ||
| 277 | #ifdef CONFIG_SYS_MALLOC_F_LEN | |
| 278 | ||
| 279 | #if CONFIG_SYS_MALLOC_F_LEN + GENERATED_GBL_DATA_SIZE > CONFIG_SYS_INIT_RAM_SIZE | |
| 280 | #error "CONFIG_SYS_MALLOC_F_LEN too large to fit into initial RAM." | |
| 281 | #endif | |
| 282 | ||
| 283 | /* r3 = new stack pointer / pre-reloc malloc area */ | |
| 284 | subi r3, r3, CONFIG_SYS_MALLOC_F_LEN | |
| 285 | ||
| 286 | /* Set pointer to pre-reloc malloc area in GD */ | |
| 287 | stw r3, GD_MALLOC_BASE(r4) | |
| 288 | #endif | |
| 2688e2f9 | 289 | li r0, 0 /* Make room for stack frame header and */ |
| e80311a5 | 290 | stwu r0, -4(r3) /* clear final stack frame so that */ |
| 291 | stwu r0, -4(r3) /* stack backtraces terminate cleanly */ | |
| 2688e2f9 | 292 | |
| e80311a5 | 293 | /* Finally, actually set SP */ |
| 294 | mr r1, r3 | |
| f046ccd1 EL |
295 | |
| 296 | /* let the C-code set up the rest */ | |
| 2688e2f9 | 297 | /* */ |
| f046ccd1 EL |
298 | /* Be careful to keep code relocatable & stack humble */ |
| 299 | /*------------------------------------------------------*/ | |
| 300 | ||
| 301 | GET_GOT /* initialize GOT access */ | |
| 8c4734e9 | 302 | |
| f046ccd1 | 303 | /* r3: IMMR */ |
| 6d0f6bcf | 304 | lis r3, CONFIG_SYS_IMMR@h |
| f046ccd1 EL |
305 | /* run low-level CPU init code (in Flash)*/ |
| 306 | bl cpu_init_f | |
| 307 | ||
| f046ccd1 | 308 | /* run 1st part of board init code (in Flash)*/ |
| e83a7e94 | 309 | li r3, 0 /* clear boot_flag for calling board_init_f */ |
| f046ccd1 EL |
310 | bl board_init_f |
| 311 | ||
| 52ebd9c1 PT |
312 | /* NOTREACHED - board_init_f() does not return */ |
| 313 | ||
| 06f60ae3 | 314 | #ifndef MINIMAL_SPL |
| f046ccd1 EL |
315 | /* |
| 316 | * Vector Table | |
| 317 | */ | |
| 318 | ||
| 319 | .globl _start_of_vectors | |
| 320 | _start_of_vectors: | |
| 321 | ||
| 322 | /* Machine check */ | |
| 323 | STD_EXCEPTION(0x200, MachineCheck, MachineCheckException) | |
| 324 | ||
| 325 | /* Data Storage exception. */ | |
| 326 | STD_EXCEPTION(0x300, DataStorage, UnknownException) | |
| 327 | ||
| 328 | /* Instruction Storage exception. */ | |
| 329 | STD_EXCEPTION(0x400, InstStorage, UnknownException) | |
| 330 | ||
| 331 | /* External Interrupt exception. */ | |
| 332 | #ifndef FIXME | |
| 333 | STD_EXCEPTION(0x500, ExtInterrupt, external_interrupt) | |
| de1d0a69 | 334 | #endif |
| f046ccd1 EL |
335 | |
| 336 | /* Alignment exception. */ | |
| 337 | . = 0x600 | |
| 338 | Alignment: | |
| 02032e8f | 339 | EXCEPTION_PROLOG(SRR0, SRR1) |
| f046ccd1 EL |
340 | mfspr r4,DAR |
| 341 | stw r4,_DAR(r21) | |
| 342 | mfspr r5,DSISR | |
| 343 | stw r5,_DSISR(r21) | |
| 344 | addi r3,r1,STACK_FRAME_OVERHEAD | |
| fc4e1887 | 345 | EXC_XFER_TEMPLATE(Alignment, AlignmentException, MSR_KERNEL, COPY_EE) |
| f046ccd1 EL |
346 | |
| 347 | /* Program check exception */ | |
| 348 | . = 0x700 | |
| 349 | ProgramCheck: | |
| 02032e8f | 350 | EXCEPTION_PROLOG(SRR0, SRR1) |
| f046ccd1 | 351 | addi r3,r1,STACK_FRAME_OVERHEAD |
| fc4e1887 JT |
352 | EXC_XFER_TEMPLATE(ProgramCheck, ProgramCheckException, |
| 353 | MSR_KERNEL, COPY_EE) | |
| f046ccd1 EL |
354 | |
| 355 | STD_EXCEPTION(0x800, FPUnavailable, UnknownException) | |
| 356 | ||
| 357 | /* I guess we could implement decrementer, and may have | |
| 358 | * to someday for timekeeping. | |
| 359 | */ | |
| 360 | STD_EXCEPTION(0x900, Decrementer, timer_interrupt) | |
| 361 | ||
| 362 | STD_EXCEPTION(0xa00, Trap_0a, UnknownException) | |
| 363 | STD_EXCEPTION(0xb00, Trap_0b, UnknownException) | |
| 364 | STD_EXCEPTION(0xc00, SystemCall, UnknownException) | |
| 365 | STD_EXCEPTION(0xd00, SingleStep, UnknownException) | |
| 366 | ||
| 367 | STD_EXCEPTION(0xe00, Trap_0e, UnknownException) | |
| 368 | STD_EXCEPTION(0xf00, Trap_0f, UnknownException) | |
| 369 | ||
| 370 | STD_EXCEPTION(0x1000, InstructionTLBMiss, UnknownException) | |
| 371 | STD_EXCEPTION(0x1100, DataLoadTLBMiss, UnknownException) | |
| 372 | STD_EXCEPTION(0x1200, DataStoreTLBMiss, UnknownException) | |
| 373 | #ifdef DEBUG | |
| 374 | . = 0x1300 | |
| 375 | /* | |
| 376 | * This exception occurs when the program counter matches the | |
| 377 | * Instruction Address Breakpoint Register (IABR). | |
| 378 | * | |
| 379 | * I want the cpu to halt if this occurs so I can hunt around | |
| 380 | * with the debugger and look at things. | |
| 381 | * | |
| 382 | * When DEBUG is defined, both machine check enable (in the MSR) | |
| 383 | * and checkstop reset enable (in the reset mode register) are | |
| 384 | * turned off and so a checkstop condition will result in the cpu | |
| 385 | * halting. | |
| 386 | * | |
| 387 | * I force the cpu into a checkstop condition by putting an illegal | |
| 388 | * instruction here (at least this is the theory). | |
| 389 | * | |
| 390 | * well - that didnt work, so just do an infinite loop! | |
| 391 | */ | |
| 392 | 1: b 1b | |
| 393 | #else | |
| 394 | STD_EXCEPTION(0x1300, InstructionBreakpoint, DebugException) | |
| 395 | #endif | |
| 396 | STD_EXCEPTION(0x1400, SMI, UnknownException) | |
| 397 | ||
| 398 | STD_EXCEPTION(0x1500, Trap_15, UnknownException) | |
| 399 | STD_EXCEPTION(0x1600, Trap_16, UnknownException) | |
| 400 | STD_EXCEPTION(0x1700, Trap_17, UnknownException) | |
| 401 | STD_EXCEPTION(0x1800, Trap_18, UnknownException) | |
| 402 | STD_EXCEPTION(0x1900, Trap_19, UnknownException) | |
| 403 | STD_EXCEPTION(0x1a00, Trap_1a, UnknownException) | |
| 404 | STD_EXCEPTION(0x1b00, Trap_1b, UnknownException) | |
| 405 | STD_EXCEPTION(0x1c00, Trap_1c, UnknownException) | |
| 406 | STD_EXCEPTION(0x1d00, Trap_1d, UnknownException) | |
| 407 | STD_EXCEPTION(0x1e00, Trap_1e, UnknownException) | |
| 408 | STD_EXCEPTION(0x1f00, Trap_1f, UnknownException) | |
| 409 | STD_EXCEPTION(0x2000, Trap_20, UnknownException) | |
| 410 | STD_EXCEPTION(0x2100, Trap_21, UnknownException) | |
| 411 | STD_EXCEPTION(0x2200, Trap_22, UnknownException) | |
| 412 | STD_EXCEPTION(0x2300, Trap_23, UnknownException) | |
| 413 | STD_EXCEPTION(0x2400, Trap_24, UnknownException) | |
| 414 | STD_EXCEPTION(0x2500, Trap_25, UnknownException) | |
| 415 | STD_EXCEPTION(0x2600, Trap_26, UnknownException) | |
| 416 | STD_EXCEPTION(0x2700, Trap_27, UnknownException) | |
| 417 | STD_EXCEPTION(0x2800, Trap_28, UnknownException) | |
| 418 | STD_EXCEPTION(0x2900, Trap_29, UnknownException) | |
| 419 | STD_EXCEPTION(0x2a00, Trap_2a, UnknownException) | |
| 420 | STD_EXCEPTION(0x2b00, Trap_2b, UnknownException) | |
| 421 | STD_EXCEPTION(0x2c00, Trap_2c, UnknownException) | |
| 422 | STD_EXCEPTION(0x2d00, Trap_2d, UnknownException) | |
| 423 | STD_EXCEPTION(0x2e00, Trap_2e, UnknownException) | |
| 424 | STD_EXCEPTION(0x2f00, Trap_2f, UnknownException) | |
| 425 | ||
| 426 | ||
| 427 | .globl _end_of_vectors | |
| 428 | _end_of_vectors: | |
| 429 | ||
| 430 | . = 0x3000 | |
| 431 | ||
| 432 | /* | |
| 433 | * This code finishes saving the registers to the exception frame | |
| 434 | * and jumps to the appropriate handler for the exception. | |
| 435 | * Register r21 is pointer into trap frame, r1 has new stack pointer. | |
| 436 | */ | |
| 437 | .globl transfer_to_handler | |
| 438 | transfer_to_handler: | |
| 439 | stw r22,_NIP(r21) | |
| 440 | lis r22,MSR_POW@h | |
| 441 | andc r23,r23,r22 | |
| 442 | stw r23,_MSR(r21) | |
| 443 | SAVE_GPR(7, r21) | |
| 444 | SAVE_4GPRS(8, r21) | |
| 445 | SAVE_8GPRS(12, r21) | |
| 446 | SAVE_8GPRS(24, r21) | |
| 447 | mflr r23 | |
| 448 | andi. r24,r23,0x3f00 /* get vector offset */ | |
| 449 | stw r24,TRAP(r21) | |
| 450 | li r22,0 | |
| 451 | stw r22,RESULT(r21) | |
| 452 | lwz r24,0(r23) /* virtual address of handler */ | |
| 453 | lwz r23,4(r23) /* where to go when done */ | |
| 454 | mtspr SRR0,r24 | |
| 455 | mtspr SRR1,r20 | |
| 456 | mtlr r23 | |
| 457 | SYNC | |
| 458 | rfi /* jump to handler, enable MMU */ | |
| 459 | ||
| 460 | int_return: | |
| 461 | mfmsr r28 /* Disable interrupts */ | |
| 462 | li r4,0 | |
| 463 | ori r4,r4,MSR_EE | |
| 464 | andc r28,r28,r4 | |
| 465 | SYNC /* Some chip revs need this... */ | |
| 466 | mtmsr r28 | |
| 467 | SYNC | |
| 468 | lwz r2,_CTR(r1) | |
| 469 | lwz r0,_LINK(r1) | |
| 470 | mtctr r2 | |
| 471 | mtlr r0 | |
| 472 | lwz r2,_XER(r1) | |
| 473 | lwz r0,_CCR(r1) | |
| 474 | mtspr XER,r2 | |
| 475 | mtcrf 0xFF,r0 | |
| 476 | REST_10GPRS(3, r1) | |
| 477 | REST_10GPRS(13, r1) | |
| 478 | REST_8GPRS(23, r1) | |
| 479 | REST_GPR(31, r1) | |
| 480 | lwz r2,_NIP(r1) /* Restore environment */ | |
| 481 | lwz r0,_MSR(r1) | |
| 482 | mtspr SRR0,r2 | |
| 483 | mtspr SRR1,r0 | |
| 484 | lwz r0,GPR0(r1) | |
| 485 | lwz r2,GPR2(r1) | |
| 486 | lwz r1,GPR1(r1) | |
| 487 | SYNC | |
| 488 | rfi | |
| 06f60ae3 | 489 | #endif /* !MINIMAL_SPL */ |
| f046ccd1 EL |
490 | |
| 491 | /* | |
| 492 | * This code initialises the E300 processor core | |
| 493 | * (conforms to PowerPC 603e spec) | |
| 494 | * Note: expects original MSR contents to be in r5. | |
| 495 | */ | |
| 496 | .globl init_e300_core | |
| 497 | init_e300_core: /* time t 10 */ | |
| 498 | /* Initialize machine status; enable machine check interrupt */ | |
| 499 | /*-----------------------------------------------------------*/ | |
| 500 | ||
| 501 | li r3, MSR_KERNEL /* Set ME and RI flags */ | |
| 502 | rlwimi r3, r5, 0, 25, 25 /* preserve IP bit set by HRCW */ | |
| 503 | #ifdef DEBUG | |
| 504 | rlwimi r3, r5, 0, 21, 22 /* debugger might set SE & BE bits */ | |
| 505 | #endif | |
| 506 | SYNC /* Some chip revs need this... */ | |
| 507 | mtmsr r3 | |
| 508 | SYNC | |
| 509 | mtspr SRR1, r3 /* Make SRR1 match MSR */ | |
| 510 | ||
| 511 | ||
| 6d0f6bcf | 512 | lis r3, CONFIG_SYS_IMMR@h |
| f046ccd1 | 513 | #if defined(CONFIG_WATCHDOG) |
| f6970d0c | 514 | /* Initialise the Watchdog values and reset it (if req) */ |
| f046ccd1 | 515 | /*------------------------------------------------------*/ |
| 6d0f6bcf | 516 | lis r4, CONFIG_SYS_WATCHDOG_VALUE |
| f046ccd1 EL |
517 | ori r4, r4, (SWCRR_SWEN | SWCRR_SWRI | SWCRR_SWPR) |
| 518 | stw r4, SWCRR(r3) | |
| de1d0a69 | 519 | |
| f046ccd1 | 520 | /* and reset it */ |
| de1d0a69 | 521 | |
| f046ccd1 EL |
522 | li r4, 0x556C |
| 523 | sth r4, SWSRR@l(r3) | |
| f6db9456 | 524 | li r4, -0x55C7 |
| f046ccd1 EL |
525 | sth r4, SWSRR@l(r3) |
| 526 | #else | |
| f6970d0c | 527 | /* Disable Watchdog */ |
| f046ccd1 | 528 | /*-------------------*/ |
| ec00c335 KG |
529 | lwz r4, SWCRR(r3) |
| 530 | /* Check to see if its enabled for disabling | |
| 531 | once disabled by SW you can't re-enable */ | |
| 532 | andi. r4, r4, 0x4 | |
| 533 | beq 1f | |
| f046ccd1 EL |
534 | xor r4, r4, r4 |
| 535 | stw r4, SWCRR(r3) | |
| ec00c335 | 536 | 1: |
| f046ccd1 EL |
537 | #endif /* CONFIG_WATCHDOG */ |
| 538 | ||
| 46497056 NS |
539 | #if defined(CONFIG_MASK_AER_AO) |
| 540 | /* Write the Arbiter Event Enable to mask Address Only traps. */ | |
| 541 | /* This prevents the dcbz instruction from being trapped when */ | |
| 542 | /* HID0_ABE Address Broadcast Enable is set and the MEMORY */ | |
| 543 | /* COHERENCY bit is set in the WIMG bits, which is often */ | |
| 544 | /* needed for PCI operation. */ | |
| 545 | lwz r4, 0x0808(r3) | |
| 546 | rlwinm r0, r4, 0, ~AER_AO | |
| 547 | stw r0, 0x0808(r3) | |
| 548 | #endif /* CONFIG_MASK_AER_AO */ | |
| 549 | ||
| f046ccd1 EL |
550 | /* Initialize the Hardware Implementation-dependent Registers */ |
| 551 | /* HID0 also contains cache control */ | |
| 6eb2a44e | 552 | /* - force invalidation of data and instruction caches */ |
| f046ccd1 EL |
553 | /*------------------------------------------------------*/ |
| 554 | ||
| 6d0f6bcf JCPV |
555 | lis r3, CONFIG_SYS_HID0_INIT@h |
| 556 | ori r3, r3, (CONFIG_SYS_HID0_INIT | HID0_ICFI | HID0_DCFI)@l | |
| f046ccd1 EL |
557 | SYNC |
| 558 | mtspr HID0, r3 | |
| 559 | ||
| 6d0f6bcf JCPV |
560 | lis r3, CONFIG_SYS_HID0_FINAL@h |
| 561 | ori r3, r3, (CONFIG_SYS_HID0_FINAL & ~(HID0_ICFI | HID0_DCFI))@l | |
| f046ccd1 EL |
562 | SYNC |
| 563 | mtspr HID0, r3 | |
| 564 | ||
| 6d0f6bcf JCPV |
565 | lis r3, CONFIG_SYS_HID2@h |
| 566 | ori r3, r3, CONFIG_SYS_HID2@l | |
| f046ccd1 EL |
567 | SYNC |
| 568 | mtspr HID2, r3 | |
| 569 | ||
| f046ccd1 EL |
570 | /* Done! */ |
| 571 | /*------------------------------*/ | |
| de1d0a69 | 572 | blr |
| f046ccd1 | 573 | |
| 2688e2f9 KG |
574 | /* setup_bats - set them up to some initial state */ |
| 575 | .globl setup_bats | |
| 576 | setup_bats: | |
| 577 | addis r0, r0, 0x0000 | |
| 578 | ||
| 579 | /* IBAT 0 */ | |
| 6d0f6bcf JCPV |
580 | addis r4, r0, CONFIG_SYS_IBAT0L@h |
| 581 | ori r4, r4, CONFIG_SYS_IBAT0L@l | |
| 582 | addis r3, r0, CONFIG_SYS_IBAT0U@h | |
| 583 | ori r3, r3, CONFIG_SYS_IBAT0U@l | |
| 2688e2f9 KG |
584 | mtspr IBAT0L, r4 |
| 585 | mtspr IBAT0U, r3 | |
| 2688e2f9 KG |
586 | |
| 587 | /* DBAT 0 */ | |
| 6d0f6bcf JCPV |
588 | addis r4, r0, CONFIG_SYS_DBAT0L@h |
| 589 | ori r4, r4, CONFIG_SYS_DBAT0L@l | |
| 590 | addis r3, r0, CONFIG_SYS_DBAT0U@h | |
| 591 | ori r3, r3, CONFIG_SYS_DBAT0U@l | |
| 2688e2f9 KG |
592 | mtspr DBAT0L, r4 |
| 593 | mtspr DBAT0U, r3 | |
| 2688e2f9 KG |
594 | |
| 595 | /* IBAT 1 */ | |
| 6d0f6bcf JCPV |
596 | addis r4, r0, CONFIG_SYS_IBAT1L@h |
| 597 | ori r4, r4, CONFIG_SYS_IBAT1L@l | |
| 598 | addis r3, r0, CONFIG_SYS_IBAT1U@h | |
| 599 | ori r3, r3, CONFIG_SYS_IBAT1U@l | |
| 2688e2f9 KG |
600 | mtspr IBAT1L, r4 |
| 601 | mtspr IBAT1U, r3 | |
| 2688e2f9 KG |
602 | |
| 603 | /* DBAT 1 */ | |
| 6d0f6bcf JCPV |
604 | addis r4, r0, CONFIG_SYS_DBAT1L@h |
| 605 | ori r4, r4, CONFIG_SYS_DBAT1L@l | |
| 606 | addis r3, r0, CONFIG_SYS_DBAT1U@h | |
| 607 | ori r3, r3, CONFIG_SYS_DBAT1U@l | |
| 2688e2f9 KG |
608 | mtspr DBAT1L, r4 |
| 609 | mtspr DBAT1U, r3 | |
| 2688e2f9 KG |
610 | |
| 611 | /* IBAT 2 */ | |
| 6d0f6bcf JCPV |
612 | addis r4, r0, CONFIG_SYS_IBAT2L@h |
| 613 | ori r4, r4, CONFIG_SYS_IBAT2L@l | |
| 614 | addis r3, r0, CONFIG_SYS_IBAT2U@h | |
| 615 | ori r3, r3, CONFIG_SYS_IBAT2U@l | |
| 2688e2f9 KG |
616 | mtspr IBAT2L, r4 |
| 617 | mtspr IBAT2U, r3 | |
| 2688e2f9 KG |
618 | |
| 619 | /* DBAT 2 */ | |
| 6d0f6bcf JCPV |
620 | addis r4, r0, CONFIG_SYS_DBAT2L@h |
| 621 | ori r4, r4, CONFIG_SYS_DBAT2L@l | |
| 622 | addis r3, r0, CONFIG_SYS_DBAT2U@h | |
| 623 | ori r3, r3, CONFIG_SYS_DBAT2U@l | |
| 2688e2f9 KG |
624 | mtspr DBAT2L, r4 |
| 625 | mtspr DBAT2U, r3 | |
| 2688e2f9 KG |
626 | |
| 627 | /* IBAT 3 */ | |
| 6d0f6bcf JCPV |
628 | addis r4, r0, CONFIG_SYS_IBAT3L@h |
| 629 | ori r4, r4, CONFIG_SYS_IBAT3L@l | |
| 630 | addis r3, r0, CONFIG_SYS_IBAT3U@h | |
| 631 | ori r3, r3, CONFIG_SYS_IBAT3U@l | |
| 2688e2f9 KG |
632 | mtspr IBAT3L, r4 |
| 633 | mtspr IBAT3U, r3 | |
| 2688e2f9 KG |
634 | |
| 635 | /* DBAT 3 */ | |
| 6d0f6bcf JCPV |
636 | addis r4, r0, CONFIG_SYS_DBAT3L@h |
| 637 | ori r4, r4, CONFIG_SYS_DBAT3L@l | |
| 638 | addis r3, r0, CONFIG_SYS_DBAT3U@h | |
| 639 | ori r3, r3, CONFIG_SYS_DBAT3U@l | |
| 2688e2f9 KG |
640 | mtspr DBAT3L, r4 |
| 641 | mtspr DBAT3U, r3 | |
| 2688e2f9 | 642 | |
| 31d82672 | 643 | #ifdef CONFIG_HIGH_BATS |
| 2688e2f9 | 644 | /* IBAT 4 */ |
| 6d0f6bcf JCPV |
645 | addis r4, r0, CONFIG_SYS_IBAT4L@h |
| 646 | ori r4, r4, CONFIG_SYS_IBAT4L@l | |
| 647 | addis r3, r0, CONFIG_SYS_IBAT4U@h | |
| 648 | ori r3, r3, CONFIG_SYS_IBAT4U@l | |
| 2688e2f9 KG |
649 | mtspr IBAT4L, r4 |
| 650 | mtspr IBAT4U, r3 | |
| 2688e2f9 KG |
651 | |
| 652 | /* DBAT 4 */ | |
| 6d0f6bcf JCPV |
653 | addis r4, r0, CONFIG_SYS_DBAT4L@h |
| 654 | ori r4, r4, CONFIG_SYS_DBAT4L@l | |
| 655 | addis r3, r0, CONFIG_SYS_DBAT4U@h | |
| 656 | ori r3, r3, CONFIG_SYS_DBAT4U@l | |
| 2688e2f9 KG |
657 | mtspr DBAT4L, r4 |
| 658 | mtspr DBAT4U, r3 | |
| 2688e2f9 KG |
659 | |
| 660 | /* IBAT 5 */ | |
| 6d0f6bcf JCPV |
661 | addis r4, r0, CONFIG_SYS_IBAT5L@h |
| 662 | ori r4, r4, CONFIG_SYS_IBAT5L@l | |
| 663 | addis r3, r0, CONFIG_SYS_IBAT5U@h | |
| 664 | ori r3, r3, CONFIG_SYS_IBAT5U@l | |
| 2688e2f9 KG |
665 | mtspr IBAT5L, r4 |
| 666 | mtspr IBAT5U, r3 | |
| 2688e2f9 KG |
667 | |
| 668 | /* DBAT 5 */ | |
| 6d0f6bcf JCPV |
669 | addis r4, r0, CONFIG_SYS_DBAT5L@h |
| 670 | ori r4, r4, CONFIG_SYS_DBAT5L@l | |
| 671 | addis r3, r0, CONFIG_SYS_DBAT5U@h | |
| 672 | ori r3, r3, CONFIG_SYS_DBAT5U@l | |
| 2688e2f9 KG |
673 | mtspr DBAT5L, r4 |
| 674 | mtspr DBAT5U, r3 | |
| 2688e2f9 KG |
675 | |
| 676 | /* IBAT 6 */ | |
| 6d0f6bcf JCPV |
677 | addis r4, r0, CONFIG_SYS_IBAT6L@h |
| 678 | ori r4, r4, CONFIG_SYS_IBAT6L@l | |
| 679 | addis r3, r0, CONFIG_SYS_IBAT6U@h | |
| 680 | ori r3, r3, CONFIG_SYS_IBAT6U@l | |
| 2688e2f9 KG |
681 | mtspr IBAT6L, r4 |
| 682 | mtspr IBAT6U, r3 | |
| 2688e2f9 KG |
683 | |
| 684 | /* DBAT 6 */ | |
| 6d0f6bcf JCPV |
685 | addis r4, r0, CONFIG_SYS_DBAT6L@h |
| 686 | ori r4, r4, CONFIG_SYS_DBAT6L@l | |
| 687 | addis r3, r0, CONFIG_SYS_DBAT6U@h | |
| 688 | ori r3, r3, CONFIG_SYS_DBAT6U@l | |
| 2688e2f9 KG |
689 | mtspr DBAT6L, r4 |
| 690 | mtspr DBAT6U, r3 | |
| 2688e2f9 KG |
691 | |
| 692 | /* IBAT 7 */ | |
| 6d0f6bcf JCPV |
693 | addis r4, r0, CONFIG_SYS_IBAT7L@h |
| 694 | ori r4, r4, CONFIG_SYS_IBAT7L@l | |
| 695 | addis r3, r0, CONFIG_SYS_IBAT7U@h | |
| 696 | ori r3, r3, CONFIG_SYS_IBAT7U@l | |
| 2688e2f9 KG |
697 | mtspr IBAT7L, r4 |
| 698 | mtspr IBAT7U, r3 | |
| 2688e2f9 KG |
699 | |
| 700 | /* DBAT 7 */ | |
| 6d0f6bcf JCPV |
701 | addis r4, r0, CONFIG_SYS_DBAT7L@h |
| 702 | ori r4, r4, CONFIG_SYS_DBAT7L@l | |
| 703 | addis r3, r0, CONFIG_SYS_DBAT7U@h | |
| 704 | ori r3, r3, CONFIG_SYS_DBAT7U@l | |
| 2688e2f9 KG |
705 | mtspr DBAT7L, r4 |
| 706 | mtspr DBAT7U, r3 | |
| 2688e2f9 KG |
707 | #endif |
| 708 | ||
| e4c09508 SW |
709 | isync |
| 710 | ||
| 711 | /* invalidate all tlb's | |
| 712 | * | |
| 713 | * From the 603e User Manual: "The 603e provides the ability to | |
| 714 | * invalidate a TLB entry. The TLB Invalidate Entry (tlbie) | |
| 715 | * instruction invalidates the TLB entry indexed by the EA, and | |
| 716 | * operates on both the instruction and data TLBs simultaneously | |
| 717 | * invalidating four TLB entries (both sets in each TLB). The | |
| 718 | * index corresponds to bits 15-19 of the EA. To invalidate all | |
| 719 | * entries within both TLBs, 32 tlbie instructions should be | |
| 720 | * issued, incrementing this field by one each time." | |
| 721 | * | |
| 722 | * "Note that the tlbia instruction is not implemented on the | |
| 723 | * 603e." | |
| 724 | * | |
| 725 | * bits 15-19 correspond to addresses 0x00000000 to 0x0001F000 | |
| 726 | * incrementing by 0x1000 each time. The code below is sort of | |
| a47a12be | 727 | * based on code in "flush_tlbs" from arch/powerpc/kernel/head.S |
| e4c09508 | 728 | * |
| 2688e2f9 KG |
729 | */ |
| 730 | lis r3, 0 | |
| 731 | lis r5, 2 | |
| 732 | ||
| 733 | 1: | |
| 734 | tlbie r3 | |
| 735 | addi r3, r3, 0x1000 | |
| 736 | cmp 0, 0, r3, r5 | |
| 737 | blt 1b | |
| 738 | ||
| 739 | blr | |
| 740 | ||
| f046ccd1 EL |
741 | /* Cache functions. |
| 742 | * | |
| 743 | * Note: requires that all cache bits in | |
| 744 | * HID0 are in the low half word. | |
| 745 | */ | |
| 06f60ae3 | 746 | #ifndef MINIMAL_SPL |
| f046ccd1 EL |
747 | .globl icache_enable |
| 748 | icache_enable: | |
| 749 | mfspr r3, HID0 | |
| 750 | ori r3, r3, HID0_ICE | |
| 6eb2a44e | 751 | li r4, HID0_ICFI|HID0_ILOCK |
| f046ccd1 EL |
752 | andc r3, r3, r4 |
| 753 | ori r4, r3, HID0_ICFI | |
| 754 | isync | |
| 755 | mtspr HID0, r4 /* sets enable and invalidate, clears lock */ | |
| 756 | isync | |
| 757 | mtspr HID0, r3 /* clears invalidate */ | |
| 758 | blr | |
| 759 | ||
| 760 | .globl icache_disable | |
| 761 | icache_disable: | |
| 762 | mfspr r3, HID0 | |
| 763 | lis r4, 0 | |
| 6eb2a44e | 764 | ori r4, r4, HID0_ICE|HID0_ICFI|HID0_ILOCK |
| f046ccd1 | 765 | andc r3, r3, r4 |
| f046ccd1 | 766 | isync |
| 6eb2a44e | 767 | mtspr HID0, r3 /* clears invalidate, enable and lock */ |
| f046ccd1 EL |
768 | blr |
| 769 | ||
| 770 | .globl icache_status | |
| 771 | icache_status: | |
| 772 | mfspr r3, HID0 | |
| a7c66ad2 | 773 | rlwinm r3, r3, (31 - HID0_ICE_SHIFT + 1), 31, 31 |
| f046ccd1 | 774 | blr |
| 06f60ae3 | 775 | #endif /* !MINIMAL_SPL */ |
| f046ccd1 EL |
776 | |
| 777 | .globl dcache_enable | |
| 778 | dcache_enable: | |
| 779 | mfspr r3, HID0 | |
| 2688e2f9 KG |
780 | li r5, HID0_DCFI|HID0_DLOCK |
| 781 | andc r3, r3, r5 | |
| 2688e2f9 | 782 | ori r3, r3, HID0_DCE |
| f046ccd1 | 783 | sync |
| 6eb2a44e | 784 | mtspr HID0, r3 /* enable, no invalidate */ |
| f046ccd1 EL |
785 | blr |
| 786 | ||
| 787 | .globl dcache_disable | |
| 788 | dcache_disable: | |
| 6eb2a44e NS |
789 | mflr r4 |
| 790 | bl flush_dcache /* uses r3 and r5 */ | |
| f046ccd1 | 791 | mfspr r3, HID0 |
| 6eb2a44e NS |
792 | li r5, HID0_DCE|HID0_DLOCK |
| 793 | andc r3, r3, r5 | |
| 794 | ori r5, r3, HID0_DCFI | |
| f046ccd1 | 795 | sync |
| 6eb2a44e | 796 | mtspr HID0, r5 /* sets invalidate, clears enable and lock */ |
| f046ccd1 EL |
797 | sync |
| 798 | mtspr HID0, r3 /* clears invalidate */ | |
| 6eb2a44e | 799 | mtlr r4 |
| f046ccd1 EL |
800 | blr |
| 801 | ||
| 802 | .globl dcache_status | |
| 803 | dcache_status: | |
| 804 | mfspr r3, HID0 | |
| a7c66ad2 | 805 | rlwinm r3, r3, (31 - HID0_DCE_SHIFT + 1), 31, 31 |
| f046ccd1 EL |
806 | blr |
| 807 | ||
| 6eb2a44e NS |
808 | .globl flush_dcache |
| 809 | flush_dcache: | |
| 810 | lis r3, 0 | |
| 6d0f6bcf | 811 | lis r5, CONFIG_SYS_CACHELINE_SIZE |
| 6eb2a44e NS |
812 | 1: cmp 0, 1, r3, r5 |
| 813 | bge 2f | |
| 814 | lwz r5, 0(r3) | |
| 6d0f6bcf | 815 | lis r5, CONFIG_SYS_CACHELINE_SIZE |
| 6eb2a44e NS |
816 | addi r3, r3, 0x4 |
| 817 | b 1b | |
| 818 | 2: blr | |
| 819 | ||
| f046ccd1 EL |
820 | /*-------------------------------------------------------------------*/ |
| 821 | ||
| 822 | /* | |
| 823 | * void relocate_code (addr_sp, gd, addr_moni) | |
| 824 | * | |
| 825 | * This "function" does not return, instead it continues in RAM | |
| 826 | * after relocating the monitor code. | |
| 827 | * | |
| 828 | * r3 = dest | |
| 829 | * r4 = src | |
| 830 | * r5 = length in bytes | |
| 831 | * r6 = cachelinesize | |
| 832 | */ | |
| 833 | .globl relocate_code | |
| 834 | relocate_code: | |
| 835 | mr r1, r3 /* Set new stack pointer */ | |
| 836 | mr r9, r4 /* Save copy of Global Data pointer */ | |
| 837 | mr r10, r5 /* Save copy of Destination Address */ | |
| 838 | ||
| 0f8aa159 | 839 | GET_GOT |
| f046ccd1 | 840 | mr r3, r5 /* Destination Address */ |
| 6d0f6bcf JCPV |
841 | lis r4, CONFIG_SYS_MONITOR_BASE@h /* Source Address */ |
| 842 | ori r4, r4, CONFIG_SYS_MONITOR_BASE@l | |
| e4c09508 | 843 | lwz r5, GOT(__bss_start) |
| f046ccd1 | 844 | sub r5, r5, r4 |
| 6d0f6bcf | 845 | li r6, CONFIG_SYS_CACHELINE_SIZE /* Cache Line Size */ |
| f046ccd1 EL |
846 | |
| 847 | /* | |
| 848 | * Fix GOT pointer: | |
| 849 | * | |
| 6d0f6bcf | 850 | * New GOT-PTR = (old GOT-PTR - CONFIG_SYS_MONITOR_BASE) |
| f046ccd1 EL |
851 | * + Destination Address |
| 852 | * | |
| 853 | * Offset: | |
| 854 | */ | |
| 855 | sub r15, r10, r4 | |
| 856 | ||
| 857 | /* First our own GOT */ | |
| 0f8aa159 | 858 | add r12, r12, r15 |
| f046ccd1 EL |
859 | /* then the one used by the C code */ |
| 860 | add r30, r30, r15 | |
| 861 | ||
| 862 | /* | |
| 863 | * Now relocate code | |
| 864 | */ | |
| 865 | ||
| 866 | cmplw cr1,r3,r4 | |
| 867 | addi r0,r5,3 | |
| 868 | srwi. r0,r0,2 | |
| 869 | beq cr1,4f /* In place copy is not necessary */ | |
| 870 | beq 7f /* Protect against 0 count */ | |
| 871 | mtctr r0 | |
| 872 | bge cr1,2f | |
| 873 | la r8,-4(r4) | |
| 874 | la r7,-4(r3) | |
| 875 | ||
| 876 | /* copy */ | |
| 877 | 1: lwzu r0,4(r8) | |
| 878 | stwu r0,4(r7) | |
| 879 | bdnz 1b | |
| 880 | ||
| 881 | addi r0,r5,3 | |
| 882 | srwi. r0,r0,2 | |
| 883 | mtctr r0 | |
| 884 | la r8,-4(r4) | |
| 885 | la r7,-4(r3) | |
| de1d0a69 JL |
886 | |
| 887 | /* and compare */ | |
| f046ccd1 EL |
888 | 20: lwzu r20,4(r8) |
| 889 | lwzu r21,4(r7) | |
| 890 | xor. r22, r20, r21 | |
| 891 | bne 30f | |
| 892 | bdnz 20b | |
| 893 | b 4f | |
| 894 | ||
| 895 | /* compare failed */ | |
| 896 | 30: li r3, 0 | |
| 897 | blr | |
| 898 | ||
| 899 | 2: slwi r0,r0,2 /* re copy in reverse order ... y do we needed it? */ | |
| 900 | add r8,r4,r0 | |
| 901 | add r7,r3,r0 | |
| 902 | 3: lwzu r0,-4(r8) | |
| 903 | stwu r0,-4(r7) | |
| 904 | bdnz 3b | |
| f046ccd1 EL |
905 | |
| 906 | /* | |
| 907 | * Now flush the cache: note that we must start from a cache aligned | |
| 908 | * address. Otherwise we might miss one cache line. | |
| 909 | */ | |
| 2688e2f9 | 910 | 4: cmpwi r6,0 |
| f046ccd1 | 911 | add r5,r3,r5 |
| 2688e2f9 | 912 | beq 7f /* Always flush prefetch queue in any case */ |
| f046ccd1 EL |
913 | subi r0,r6,1 |
| 914 | andc r3,r3,r0 | |
| f046ccd1 EL |
915 | mr r4,r3 |
| 916 | 5: dcbst 0,r4 | |
| 917 | add r4,r4,r6 | |
| 918 | cmplw r4,r5 | |
| 919 | blt 5b | |
| 2688e2f9 | 920 | sync /* Wait for all dcbst to complete on bus */ |
| f046ccd1 EL |
921 | mr r4,r3 |
| 922 | 6: icbi 0,r4 | |
| 923 | add r4,r4,r6 | |
| 924 | cmplw r4,r5 | |
| 925 | blt 6b | |
| 2688e2f9 | 926 | 7: sync /* Wait for all icbi to complete on bus */ |
| f046ccd1 EL |
927 | isync |
| 928 | ||
| 929 | /* | |
| 930 | * We are done. Do not return, instead branch to second part of board | |
| 931 | * initialization, now running from RAM. | |
| 932 | */ | |
| f046ccd1 EL |
933 | addi r0, r10, in_ram - _start + EXC_OFF_SYS_RESET |
| 934 | mtlr r0 | |
| 935 | blr | |
| 936 | ||
| 937 | in_ram: | |
| 938 | ||
| 939 | /* | |
| 0f8aa159 | 940 | * Relocation Function, r12 point to got2+0x8000 |
| f046ccd1 EL |
941 | * |
| 942 | * Adjust got2 pointers, no need to check for 0, this code | |
| 943 | * already puts a few entries in the table. | |
| 944 | */ | |
| 945 | li r0,__got2_entries@sectoff@l | |
| 946 | la r3,GOT(_GOT2_TABLE_) | |
| 947 | lwz r11,GOT(_GOT2_TABLE_) | |
| 948 | mtctr r0 | |
| 949 | sub r11,r3,r11 | |
| 950 | addi r3,r3,-4 | |
| 951 | 1: lwzu r0,4(r3) | |
| afc3ba0f JT |
952 | cmpwi r0,0 |
| 953 | beq- 2f | |
| f046ccd1 EL |
954 | add r0,r0,r11 |
| 955 | stw r0,0(r3) | |
| afc3ba0f | 956 | 2: bdnz 1b |
| f046ccd1 | 957 | |
| 06f60ae3 | 958 | #ifndef MINIMAL_SPL |
| f046ccd1 EL |
959 | /* |
| 960 | * Now adjust the fixups and the pointers to the fixups | |
| 961 | * in case we need to move ourselves again. | |
| 962 | */ | |
| afc3ba0f | 963 | li r0,__fixup_entries@sectoff@l |
| f046ccd1 EL |
964 | lwz r3,GOT(_FIXUP_TABLE_) |
| 965 | cmpwi r0,0 | |
| 966 | mtctr r0 | |
| 967 | addi r3,r3,-4 | |
| 968 | beq 4f | |
| 969 | 3: lwzu r4,4(r3) | |
| 970 | lwzux r0,r4,r11 | |
| d1e0b10a | 971 | cmpwi r0,0 |
| f046ccd1 | 972 | add r0,r0,r11 |
| 34bbf618 | 973 | stw r4,0(r3) |
| d1e0b10a | 974 | beq- 5f |
| f046ccd1 | 975 | stw r0,0(r4) |
| d1e0b10a | 976 | 5: bdnz 3b |
| f046ccd1 | 977 | 4: |
| e4c09508 SW |
978 | #endif |
| 979 | ||
| f046ccd1 EL |
980 | clear_bss: |
| 981 | /* | |
| 982 | * Now clear BSS segment | |
| 983 | */ | |
| 984 | lwz r3,GOT(__bss_start) | |
| 3929fb0a | 985 | lwz r4,GOT(__bss_end) |
| f046ccd1 EL |
986 | |
| 987 | cmplw 0, r3, r4 | |
| 988 | beq 6f | |
| 989 | ||
| 990 | li r0, 0 | |
| 991 | 5: | |
| 992 | stw r0, 0(r3) | |
| 993 | addi r3, r3, 4 | |
| 994 | cmplw 0, r3, r4 | |
| 995 | bne 5b | |
| 996 | 6: | |
| 997 | ||
| 998 | mr r3, r9 /* Global Data pointer */ | |
| 999 | mr r4, r10 /* Destination Address */ | |
| 1000 | bl board_init_r | |
| 1001 | ||
| 06f60ae3 | 1002 | #ifndef MINIMAL_SPL |
| f046ccd1 EL |
1003 | /* |
| 1004 | * Copy exception vector code to low memory | |
| 1005 | * | |
| 1006 | * r3: dest_addr | |
| 1007 | * r7: source address, r8: end address, r9: target address | |
| 1008 | */ | |
| 1009 | .globl trap_init | |
| 1010 | trap_init: | |
| 0f8aa159 JT |
1011 | mflr r4 /* save link register */ |
| 1012 | GET_GOT | |
| f046ccd1 EL |
1013 | lwz r7, GOT(_start) |
| 1014 | lwz r8, GOT(_end_of_vectors) | |
| 1015 | ||
| 1016 | li r9, 0x100 /* reset vector always at 0x100 */ | |
| 1017 | ||
| 1018 | cmplw 0, r7, r8 | |
| 1019 | bgelr /* return if r7>=r8 - just in case */ | |
| f046ccd1 EL |
1020 | 1: |
| 1021 | lwz r0, 0(r7) | |
| 1022 | stw r0, 0(r9) | |
| 1023 | addi r7, r7, 4 | |
| 1024 | addi r9, r9, 4 | |
| 1025 | cmplw 0, r7, r8 | |
| 1026 | bne 1b | |
| 1027 | ||
| 1028 | /* | |
| 1029 | * relocate `hdlr' and `int_return' entries | |
| 1030 | */ | |
| 1031 | li r7, .L_MachineCheck - _start + EXC_OFF_SYS_RESET | |
| 1032 | li r8, Alignment - _start + EXC_OFF_SYS_RESET | |
| 1033 | 2: | |
| 1034 | bl trap_reloc | |
| 1035 | addi r7, r7, 0x100 /* next exception vector */ | |
| 1036 | cmplw 0, r7, r8 | |
| 1037 | blt 2b | |
| 1038 | ||
| 1039 | li r7, .L_Alignment - _start + EXC_OFF_SYS_RESET | |
| 1040 | bl trap_reloc | |
| 1041 | ||
| 1042 | li r7, .L_ProgramCheck - _start + EXC_OFF_SYS_RESET | |
| 1043 | bl trap_reloc | |
| 1044 | ||
| 1045 | li r7, .L_FPUnavailable - _start + EXC_OFF_SYS_RESET | |
| 1046 | li r8, SystemCall - _start + EXC_OFF_SYS_RESET | |
| 1047 | 3: | |
| 1048 | bl trap_reloc | |
| 1049 | addi r7, r7, 0x100 /* next exception vector */ | |
| 1050 | cmplw 0, r7, r8 | |
| 1051 | blt 3b | |
| 1052 | ||
| 1053 | li r7, .L_SingleStep - _start + EXC_OFF_SYS_RESET | |
| 1054 | li r8, _end_of_vectors - _start + EXC_OFF_SYS_RESET | |
| 1055 | 4: | |
| 1056 | bl trap_reloc | |
| 1057 | addi r7, r7, 0x100 /* next exception vector */ | |
| 1058 | cmplw 0, r7, r8 | |
| 1059 | blt 4b | |
| 1060 | ||
| 1061 | mfmsr r3 /* now that the vectors have */ | |
| 1062 | lis r7, MSR_IP@h /* relocated into low memory */ | |
| 1063 | ori r7, r7, MSR_IP@l /* MSR[IP] can be turned off */ | |
| 1064 | andc r3, r3, r7 /* (if it was on) */ | |
| 1065 | SYNC /* Some chip revs need this... */ | |
| 1066 | mtmsr r3 | |
| 1067 | SYNC | |
| 1068 | ||
| 1069 | mtlr r4 /* restore link register */ | |
| 1070 | blr | |
| 1071 | ||
| 06f60ae3 | 1072 | #endif /* !MINIMAL_SPL */ |
| f046ccd1 | 1073 | |
| 6d0f6bcf | 1074 | #ifdef CONFIG_SYS_INIT_RAM_LOCK |
| 2688e2f9 KG |
1075 | lock_ram_in_cache: |
| 1076 | /* Allocate Initial RAM in data cache. | |
| 1077 | */ | |
| 6d0f6bcf JCPV |
1078 | lis r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@h |
| 1079 | ori r3, r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@l | |
| 553f0982 | 1080 | li r4, ((CONFIG_SYS_INIT_RAM_SIZE & ~31) + \ |
| 6d0f6bcf | 1081 | (CONFIG_SYS_INIT_RAM_ADDR & 31) + 31) / 32 |
| ade50c7f | 1082 | mtctr r4 |
| 2688e2f9 KG |
1083 | 1: |
| 1084 | dcbz r0, r3 | |
| 1085 | addi r3, r3, 32 | |
| 1086 | bdnz 1b | |
| 1087 | ||
| 1088 | /* Lock the data cache */ | |
| 1089 | mfspr r0, HID0 | |
| 6eb2a44e | 1090 | ori r0, r0, HID0_DLOCK |
| 2688e2f9 KG |
1091 | sync |
| 1092 | mtspr HID0, r0 | |
| 1093 | sync | |
| 1094 | blr | |
| 1095 | ||
| 06f60ae3 | 1096 | #ifndef MINIMAL_SPL |
| f046ccd1 EL |
1097 | .globl unlock_ram_in_cache |
| 1098 | unlock_ram_in_cache: | |
| 1099 | /* invalidate the INIT_RAM section */ | |
| 6d0f6bcf JCPV |
1100 | lis r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@h |
| 1101 | ori r3, r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@l | |
| 553f0982 | 1102 | li r4, ((CONFIG_SYS_INIT_RAM_SIZE & ~31) + \ |
| 6d0f6bcf | 1103 | (CONFIG_SYS_INIT_RAM_ADDR & 31) + 31) / 32 |
| ade50c7f | 1104 | mtctr r4 |
| f046ccd1 EL |
1105 | 1: icbi r0, r3 |
| 1106 | dcbi r0, r3 | |
| 1107 | addi r3, r3, 32 | |
| 1108 | bdnz 1b | |
| 1109 | sync /* Wait for all icbi to complete on bus */ | |
| 1110 | isync | |
| 2688e2f9 KG |
1111 | |
| 1112 | /* Unlock the data cache and invalidate it */ | |
| 1113 | mfspr r3, HID0 | |
| 1114 | li r5, HID0_DLOCK|HID0_DCFI | |
| 1115 | andc r3, r3, r5 /* no invalidate, unlock */ | |
| 1116 | ori r5, r3, HID0_DCFI /* invalidate, unlock */ | |
| 6eb2a44e | 1117 | sync |
| 2688e2f9 | 1118 | mtspr HID0, r5 /* invalidate, unlock */ |
| 2688e2f9 | 1119 | sync |
| 6eb2a44e | 1120 | mtspr HID0, r3 /* no invalidate, unlock */ |
| f046ccd1 | 1121 | blr |
| 06f60ae3 | 1122 | #endif /* !MINIMAL_SPL */ |
| 6d0f6bcf | 1123 | #endif /* CONFIG_SYS_INIT_RAM_LOCK */ |
| f046ccd1 | 1124 | |
| 6d0f6bcf | 1125 | #ifdef CONFIG_SYS_FLASHBOOT |
| f046ccd1 EL |
1126 | map_flash_by_law1: |
| 1127 | /* When booting from ROM (Flash or EPROM), clear the */ | |
| 1128 | /* Address Mask in OR0 so ROM appears everywhere */ | |
| 1129 | /*----------------------------------------------------*/ | |
| 6d0f6bcf | 1130 | lis r3, (CONFIG_SYS_IMMR)@h /* r3 <= CONFIG_SYS_IMMR */ |
| de1d0a69 | 1131 | lwz r4, OR0@l(r3) |
| f046ccd1 | 1132 | li r5, 0x7fff /* r5 <= 0x00007FFFF */ |
| de1d0a69 | 1133 | and r4, r4, r5 |
| f046ccd1 EL |
1134 | stw r4, OR0@l(r3) /* OR0 <= OR0 & 0x00007FFFF */ |
| 1135 | ||
| 1136 | /* As MPC8349E User's Manual presented, when RCW[BMS] is set to 0, | |
| 1137 | * system will boot from 0x0000_0100, and the LBLAWBAR0[BASE_ADDR] | |
| 1138 | * reset value is 0x00000; when RCW[BMS] is set to 1, system will boot | |
| 1139 | * from 0xFFF0_0100, and the LBLAWBAR0[BASE_ADDR] reset value is | |
| 1140 | * 0xFF800. From the hard resetting to here, the processor fetched and | |
| 1141 | * executed the instructions one by one. There is not absolutely | |
| 1142 | * jumping happened. Laterly, the u-boot code has to do an absolutely | |
| 1143 | * jumping to tell the CPU instruction fetching component what the | |
| 1144 | * u-boot TEXT base address is. Because the TEXT base resides in the | |
| 1145 | * boot ROM memory space, to garantee the code can run smoothly after | |
| 1146 | * that jumping, we must map in the entire boot ROM by Local Access | |
| 1147 | * Window. Sometimes, we desire an non-0x00000 or non-0xFF800 starting | |
| 1148 | * address for boot ROM, such as 0xFE000000. In this case, the default | |
| 1149 | * LBIU Local Access Widow 0 will not cover this memory space. So, we | |
| 1150 | * need another window to map in it. | |
| 1151 | */ | |
| 6d0f6bcf JCPV |
1152 | lis r4, (CONFIG_SYS_FLASH_BASE)@h |
| 1153 | ori r4, r4, (CONFIG_SYS_FLASH_BASE)@l | |
| 1154 | stw r4, LBLAWBAR1(r3) /* LBLAWBAR1 <= CONFIG_SYS_FLASH_BASE */ | |
| 31068b7c | 1155 | |
| 6d0f6bcf | 1156 | /* Store 0x80000012 + log2(CONFIG_SYS_FLASH_SIZE) into LBLAWAR1 */ |
| 31068b7c TT |
1157 | lis r4, (0x80000012)@h |
| 1158 | ori r4, r4, (0x80000012)@l | |
| 6d0f6bcf | 1159 | li r5, CONFIG_SYS_FLASH_SIZE |
| 31068b7c TT |
1160 | 1: srawi. r5, r5, 1 /* r5 = r5 >> 1 */ |
| 1161 | addi r4, r4, 1 | |
| 1162 | bne 1b | |
| 1163 | ||
| f046ccd1 | 1164 | stw r4, LBLAWAR1(r3) /* LBLAWAR1 <= 8MB Flash Size */ |
| e45c98ad JT |
1165 | /* Wait for HW to catch up */ |
| 1166 | lwz r4, LBLAWAR1(r3) | |
| 1167 | twi 0,r4,0 | |
| 1168 | isync | |
| f046ccd1 EL |
1169 | blr |
| 1170 | ||
| 1171 | /* Though all the LBIU Local Access Windows and LBC Banks will be | |
| 1172 | * initialized in the C code, we'd better configure boot ROM's | |
| 1173 | * window 0 and bank 0 correctly at here. | |
| 1174 | */ | |
| 1175 | remap_flash_by_law0: | |
| 1176 | /* Initialize the BR0 with the boot ROM starting address. */ | |
| 1177 | lwz r4, BR0(r3) | |
| 1178 | li r5, 0x7FFF | |
| de1d0a69 | 1179 | and r4, r4, r5 |
| 6d0f6bcf JCPV |
1180 | lis r5, (CONFIG_SYS_FLASH_BASE & 0xFFFF8000)@h |
| 1181 | ori r5, r5, (CONFIG_SYS_FLASH_BASE & 0xFFFF8000)@l | |
| f046ccd1 | 1182 | or r5, r5, r4 |
| 6d0f6bcf | 1183 | stw r5, BR0(r3) /* r5 <= (CONFIG_SYS_FLASH_BASE & 0xFFFF8000) | (BR0 & 0x00007FFF) */ |
| f046ccd1 EL |
1184 | |
| 1185 | lwz r4, OR0(r3) | |
| 6d0f6bcf | 1186 | lis r5, ~((CONFIG_SYS_FLASH_SIZE << 4) - 1) |
| f046ccd1 | 1187 | or r4, r4, r5 |
| 31068b7c | 1188 | stw r4, OR0(r3) |
| f046ccd1 | 1189 | |
| 6d0f6bcf JCPV |
1190 | lis r4, (CONFIG_SYS_FLASH_BASE)@h |
| 1191 | ori r4, r4, (CONFIG_SYS_FLASH_BASE)@l | |
| 1192 | stw r4, LBLAWBAR0(r3) /* LBLAWBAR0 <= CONFIG_SYS_FLASH_BASE */ | |
| f046ccd1 | 1193 | |
| 6d0f6bcf | 1194 | /* Store 0x80000012 + log2(CONFIG_SYS_FLASH_SIZE) into LBLAWAR0 */ |
| 31068b7c TT |
1195 | lis r4, (0x80000012)@h |
| 1196 | ori r4, r4, (0x80000012)@l | |
| 6d0f6bcf | 1197 | li r5, CONFIG_SYS_FLASH_SIZE |
| 31068b7c TT |
1198 | 1: srawi. r5, r5, 1 /* r5 = r5 >> 1 */ |
| 1199 | addi r4, r4, 1 | |
| 1200 | bne 1b | |
| 1201 | stw r4, LBLAWAR0(r3) /* LBLAWAR0 <= Flash Size */ | |
| 1202 | ||
| f046ccd1 EL |
1203 | |
| 1204 | xor r4, r4, r4 | |
| 1205 | stw r4, LBLAWBAR1(r3) | |
| 1206 | stw r4, LBLAWAR1(r3) /* Off LBIU LAW1 */ | |
| e45c98ad JT |
1207 | /* Wait for HW to catch up */ |
| 1208 | lwz r4, LBLAWAR1(r3) | |
| 1209 | twi 0,r4,0 | |
| 1210 | isync | |
| f046ccd1 | 1211 | blr |
| 6d0f6bcf | 1212 | #endif /* CONFIG_SYS_FLASHBOOT */ |