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>
5 * Copyright Freescale Semiconductor, Inc. 2004, 2006, 2008.
7 * See file CREDITS for list of people who contributed to this
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.
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.
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,
27 * U-Boot - Startup Code for MPC83xx PowerPC based Embedded Boards
30 #include <asm-offsets.h>
33 #include <timestamp.h>
36 #define CONFIG_83XX 1 /* needed for Linux kernel header files*/
37 #define _LINUX_CONFIG_H 1 /* avoid reading Linux autoconf.h file */
39 #include <ppc_asm.tmpl>
42 #include <asm/cache.h>
44 #include <asm/u-boot.h>
46 #ifndef CONFIG_IDENT_STRING
47 #define CONFIG_IDENT_STRING "MPC83XX"
50 /* We don't want the MMU yet.
55 * Floating Point enable, Machine Check and Recoverable Interr.
58 #define MSR_KERNEL (MSR_FP|MSR_RI)
60 #define MSR_KERNEL (MSR_FP|MSR_ME|MSR_RI)
63 #if !defined(CONFIG_NAND_SPL) && !defined(CONFIG_SYS_RAMBOOT)
64 #define CONFIG_SYS_FLASHBOOT
68 * Set up GOT: Global Offset Table
70 * Use r12 to access the GOT
73 GOT_ENTRY(_GOT2_TABLE_)
74 GOT_ENTRY(__bss_start)
75 GOT_ENTRY(__bss_end__)
77 #ifndef CONFIG_NAND_SPL
78 GOT_ENTRY(_FIXUP_TABLE_)
80 GOT_ENTRY(_start_of_vectors)
81 GOT_ENTRY(_end_of_vectors)
82 GOT_ENTRY(transfer_to_handler)
87 * The Hard Reset Configuration Word (HRCW) table is in the first 64
88 * (0x40) bytes of flash. It has 8 bytes, but each byte is repeated 8
89 * times so the processor can fetch it out of flash whether the flash
90 * is 8, 16, 32, or 64 bits wide (hardware trickery).
93 #define _HRCW_TABLE_ENTRY(w) \
94 .fill 8,1,(((w)>>24)&0xff); \
95 .fill 8,1,(((w)>>16)&0xff); \
96 .fill 8,1,(((w)>> 8)&0xff); \
97 .fill 8,1,(((w) )&0xff)
99 _HRCW_TABLE_ENTRY(CONFIG_SYS_HRCW_LOW)
100 _HRCW_TABLE_ENTRY(CONFIG_SYS_HRCW_HIGH)
103 * Magic number and version string - put it after the HRCW since it
104 * cannot be first in flash like it is in many other processors.
106 .long 0x27051956 /* U-Boot Magic Number */
108 .globl version_string
110 .ascii U_BOOT_VERSION
111 .ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")"
112 .ascii " ", CONFIG_IDENT_STRING, "\0"
116 .globl enable_addr_trans
118 /* enable address translation */
120 ori r5, r5, (MSR_IR | MSR_DR)
125 .globl disable_addr_trans
127 /* disable address translation */
130 andi. r0, r3, (MSR_IR | MSR_DR)
154 #ifndef CONFIG_DEFAULT_IMMR
155 #error CONFIG_DEFAULT_IMMR must be defined
156 #endif /* CONFIG_SYS_DEFAULT_IMMR */
157 #ifndef CONFIG_SYS_IMMR
158 #define CONFIG_SYS_IMMR CONFIG_DEFAULT_IMMR
159 #endif /* CONFIG_SYS_IMMR */
162 * After configuration, a system reset exception is executed using the
163 * vector at offset 0x100 relative to the base set by MSR[IP]. If
164 * MSR[IP] is 0, the base address is 0x00000000. If MSR[IP] is 1, the
165 * base address is 0xfff00000. In the case of a Power On Reset or Hard
166 * Reset, the value of MSR[IP] is determined by the CIP field in the
169 * Other bits in the HRCW set up the Base Address and Port Size in BR0.
170 * This determines the location of the boot ROM (flash or EPROM) in the
171 * processor's address space at boot time. As long as the HRCW is set up
172 * so that we eventually end up executing the code below when the
173 * processor executes the reset exception, the actual values used should
176 * Once we have got here, the address mask in OR0 is cleared so that the
177 * bottom 32K of the boot ROM is effectively repeated all throughout the
178 * processor's address space, after which we can jump to the absolute
179 * address at which the boot ROM was linked at compile time, and proceed
180 * to initialise the memory controller without worrying if the rug will
181 * be pulled out from under us, so to speak (it will be fine as long as
182 * we configure BR0 with the same boot ROM link address).
184 . = EXC_OFF_SYS_RESET
187 _start: /* time t 0 */
188 lis r4, CONFIG_DEFAULT_IMMR@h
191 mfmsr r5 /* save msr contents */
193 /* 83xx manuals prescribe a specific sequence for updating IMMRBAR. */
197 lis r3, CONFIG_SYS_IMMR@h
198 ori r3, r3, CONFIG_SYS_IMMR@l
204 lwz r6, 0(r7) /* Arbitrary external load */
210 /* Initialise the E300 processor core */
211 /*------------------------------------------*/
213 #ifdef CONFIG_NAND_SPL
214 /* The FCM begins execution after only the first page
215 * is loaded. Wait for the rest before branching
216 * to another flash page.
218 1: lwz r6, 0x50b0(r3)
225 #ifdef CONFIG_SYS_FLASHBOOT
227 /* Inflate flash location so it appears everywhere, calculate */
228 /* the absolute address in final location of the FLASH, jump */
229 /* there and deflate the flash size back to minimal size */
230 /*------------------------------------------------------------*/
232 lis r4, (CONFIG_SYS_MONITOR_BASE)@h
233 ori r4, r4, (CONFIG_SYS_MONITOR_BASE)@l
234 addi r5, r4, in_flash - _start + EXC_OFF_SYS_RESET
238 #if 1 /* Remapping flash with LAW0. */
239 bl remap_flash_by_law0
241 #endif /* CONFIG_SYS_FLASHBOOT */
248 * Cache must be enabled here for stack-in-cache trick.
249 * This means we need to enable the BATS.
251 * 1) for the EVB, original gt regs need to be mapped
252 * 2) need to have an IBAT for the 0xf region,
253 * we are running there!
254 * Cache should be turned on after BATs, since by default
255 * everything is write-through.
256 * The init-mem BAT can be reused after reloc. The old
257 * gt-regs BAT can be reused after board_init_f calls
258 * board_early_init_f (EVB only).
260 /* enable address translation */
264 /* enable the data cache */
267 #ifdef CONFIG_SYS_INIT_RAM_LOCK
272 /* set up the stack pointer in our newly created
274 lis r1, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET)@h
275 ori r1, r1, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET)@l
277 li r0, 0 /* Make room for stack frame header and */
278 stwu r0, -4(r1) /* clear final stack frame so that */
279 stwu r0, -4(r1) /* stack backtraces terminate cleanly */
282 /* let the C-code set up the rest */
284 /* Be careful to keep code relocatable & stack humble */
285 /*------------------------------------------------------*/
287 GET_GOT /* initialize GOT access */
290 lis r3, CONFIG_SYS_IMMR@h
291 /* run low-level CPU init code (in Flash)*/
294 /* run 1st part of board init code (in Flash)*/
297 /* NOTREACHED - board_init_f() does not return */
299 #ifndef CONFIG_NAND_SPL
304 .globl _start_of_vectors
308 STD_EXCEPTION(0x200, MachineCheck, MachineCheckException)
310 /* Data Storage exception. */
311 STD_EXCEPTION(0x300, DataStorage, UnknownException)
313 /* Instruction Storage exception. */
314 STD_EXCEPTION(0x400, InstStorage, UnknownException)
316 /* External Interrupt exception. */
318 STD_EXCEPTION(0x500, ExtInterrupt, external_interrupt)
321 /* Alignment exception. */
324 EXCEPTION_PROLOG(SRR0, SRR1)
329 addi r3,r1,STACK_FRAME_OVERHEAD
330 EXC_XFER_TEMPLATE(Alignment, AlignmentException, MSR_KERNEL, COPY_EE)
332 /* Program check exception */
335 EXCEPTION_PROLOG(SRR0, SRR1)
336 addi r3,r1,STACK_FRAME_OVERHEAD
337 EXC_XFER_TEMPLATE(ProgramCheck, ProgramCheckException,
340 STD_EXCEPTION(0x800, FPUnavailable, UnknownException)
342 /* I guess we could implement decrementer, and may have
343 * to someday for timekeeping.
345 STD_EXCEPTION(0x900, Decrementer, timer_interrupt)
347 STD_EXCEPTION(0xa00, Trap_0a, UnknownException)
348 STD_EXCEPTION(0xb00, Trap_0b, UnknownException)
349 STD_EXCEPTION(0xc00, SystemCall, UnknownException)
350 STD_EXCEPTION(0xd00, SingleStep, UnknownException)
352 STD_EXCEPTION(0xe00, Trap_0e, UnknownException)
353 STD_EXCEPTION(0xf00, Trap_0f, UnknownException)
355 STD_EXCEPTION(0x1000, InstructionTLBMiss, UnknownException)
356 STD_EXCEPTION(0x1100, DataLoadTLBMiss, UnknownException)
357 STD_EXCEPTION(0x1200, DataStoreTLBMiss, UnknownException)
361 * This exception occurs when the program counter matches the
362 * Instruction Address Breakpoint Register (IABR).
364 * I want the cpu to halt if this occurs so I can hunt around
365 * with the debugger and look at things.
367 * When DEBUG is defined, both machine check enable (in the MSR)
368 * and checkstop reset enable (in the reset mode register) are
369 * turned off and so a checkstop condition will result in the cpu
372 * I force the cpu into a checkstop condition by putting an illegal
373 * instruction here (at least this is the theory).
375 * well - that didnt work, so just do an infinite loop!
379 STD_EXCEPTION(0x1300, InstructionBreakpoint, DebugException)
381 STD_EXCEPTION(0x1400, SMI, UnknownException)
383 STD_EXCEPTION(0x1500, Trap_15, UnknownException)
384 STD_EXCEPTION(0x1600, Trap_16, UnknownException)
385 STD_EXCEPTION(0x1700, Trap_17, UnknownException)
386 STD_EXCEPTION(0x1800, Trap_18, UnknownException)
387 STD_EXCEPTION(0x1900, Trap_19, UnknownException)
388 STD_EXCEPTION(0x1a00, Trap_1a, UnknownException)
389 STD_EXCEPTION(0x1b00, Trap_1b, UnknownException)
390 STD_EXCEPTION(0x1c00, Trap_1c, UnknownException)
391 STD_EXCEPTION(0x1d00, Trap_1d, UnknownException)
392 STD_EXCEPTION(0x1e00, Trap_1e, UnknownException)
393 STD_EXCEPTION(0x1f00, Trap_1f, UnknownException)
394 STD_EXCEPTION(0x2000, Trap_20, UnknownException)
395 STD_EXCEPTION(0x2100, Trap_21, UnknownException)
396 STD_EXCEPTION(0x2200, Trap_22, UnknownException)
397 STD_EXCEPTION(0x2300, Trap_23, UnknownException)
398 STD_EXCEPTION(0x2400, Trap_24, UnknownException)
399 STD_EXCEPTION(0x2500, Trap_25, UnknownException)
400 STD_EXCEPTION(0x2600, Trap_26, UnknownException)
401 STD_EXCEPTION(0x2700, Trap_27, UnknownException)
402 STD_EXCEPTION(0x2800, Trap_28, UnknownException)
403 STD_EXCEPTION(0x2900, Trap_29, UnknownException)
404 STD_EXCEPTION(0x2a00, Trap_2a, UnknownException)
405 STD_EXCEPTION(0x2b00, Trap_2b, UnknownException)
406 STD_EXCEPTION(0x2c00, Trap_2c, UnknownException)
407 STD_EXCEPTION(0x2d00, Trap_2d, UnknownException)
408 STD_EXCEPTION(0x2e00, Trap_2e, UnknownException)
409 STD_EXCEPTION(0x2f00, Trap_2f, UnknownException)
412 .globl _end_of_vectors
418 * This code finishes saving the registers to the exception frame
419 * and jumps to the appropriate handler for the exception.
420 * Register r21 is pointer into trap frame, r1 has new stack pointer.
422 .globl transfer_to_handler
433 andi. r24,r23,0x3f00 /* get vector offset */
437 lwz r24,0(r23) /* virtual address of handler */
438 lwz r23,4(r23) /* where to go when done */
443 rfi /* jump to handler, enable MMU */
446 mfmsr r28 /* Disable interrupts */
450 SYNC /* Some chip revs need this... */
465 lwz r2,_NIP(r1) /* Restore environment */
474 #endif /* !CONFIG_NAND_SPL */
477 * This code initialises the E300 processor core
478 * (conforms to PowerPC 603e spec)
479 * Note: expects original MSR contents to be in r5.
481 .globl init_e300_core
482 init_e300_core: /* time t 10 */
483 /* Initialize machine status; enable machine check interrupt */
484 /*-----------------------------------------------------------*/
486 li r3, MSR_KERNEL /* Set ME and RI flags */
487 rlwimi r3, r5, 0, 25, 25 /* preserve IP bit set by HRCW */
489 rlwimi r3, r5, 0, 21, 22 /* debugger might set SE & BE bits */
491 SYNC /* Some chip revs need this... */
494 mtspr SRR1, r3 /* Make SRR1 match MSR */
497 lis r3, CONFIG_SYS_IMMR@h
498 #if defined(CONFIG_WATCHDOG)
499 /* Initialise the Watchdog values and reset it (if req) */
500 /*------------------------------------------------------*/
501 lis r4, CONFIG_SYS_WATCHDOG_VALUE
502 ori r4, r4, (SWCRR_SWEN | SWCRR_SWRI | SWCRR_SWPR)
512 /* Disable Watchdog */
513 /*-------------------*/
515 /* Check to see if its enabled for disabling
516 once disabled by SW you can't re-enable */
522 #endif /* CONFIG_WATCHDOG */
524 #if defined(CONFIG_MASK_AER_AO)
525 /* Write the Arbiter Event Enable to mask Address Only traps. */
526 /* This prevents the dcbz instruction from being trapped when */
527 /* HID0_ABE Address Broadcast Enable is set and the MEMORY */
528 /* COHERENCY bit is set in the WIMG bits, which is often */
529 /* needed for PCI operation. */
531 rlwinm r0, r4, 0, ~AER_AO
533 #endif /* CONFIG_MASK_AER_AO */
535 /* Initialize the Hardware Implementation-dependent Registers */
536 /* HID0 also contains cache control */
537 /* - force invalidation of data and instruction caches */
538 /*------------------------------------------------------*/
540 lis r3, CONFIG_SYS_HID0_INIT@h
541 ori r3, r3, (CONFIG_SYS_HID0_INIT | HID0_ICFI | HID0_DCFI)@l
545 lis r3, CONFIG_SYS_HID0_FINAL@h
546 ori r3, r3, (CONFIG_SYS_HID0_FINAL & ~(HID0_ICFI | HID0_DCFI))@l
550 lis r3, CONFIG_SYS_HID2@h
551 ori r3, r3, CONFIG_SYS_HID2@l
556 /*------------------------------*/
559 /* setup_bats - set them up to some initial state */
565 addis r4, r0, CONFIG_SYS_IBAT0L@h
566 ori r4, r4, CONFIG_SYS_IBAT0L@l
567 addis r3, r0, CONFIG_SYS_IBAT0U@h
568 ori r3, r3, CONFIG_SYS_IBAT0U@l
573 addis r4, r0, CONFIG_SYS_DBAT0L@h
574 ori r4, r4, CONFIG_SYS_DBAT0L@l
575 addis r3, r0, CONFIG_SYS_DBAT0U@h
576 ori r3, r3, CONFIG_SYS_DBAT0U@l
581 addis r4, r0, CONFIG_SYS_IBAT1L@h
582 ori r4, r4, CONFIG_SYS_IBAT1L@l
583 addis r3, r0, CONFIG_SYS_IBAT1U@h
584 ori r3, r3, CONFIG_SYS_IBAT1U@l
589 addis r4, r0, CONFIG_SYS_DBAT1L@h
590 ori r4, r4, CONFIG_SYS_DBAT1L@l
591 addis r3, r0, CONFIG_SYS_DBAT1U@h
592 ori r3, r3, CONFIG_SYS_DBAT1U@l
597 addis r4, r0, CONFIG_SYS_IBAT2L@h
598 ori r4, r4, CONFIG_SYS_IBAT2L@l
599 addis r3, r0, CONFIG_SYS_IBAT2U@h
600 ori r3, r3, CONFIG_SYS_IBAT2U@l
605 addis r4, r0, CONFIG_SYS_DBAT2L@h
606 ori r4, r4, CONFIG_SYS_DBAT2L@l
607 addis r3, r0, CONFIG_SYS_DBAT2U@h
608 ori r3, r3, CONFIG_SYS_DBAT2U@l
613 addis r4, r0, CONFIG_SYS_IBAT3L@h
614 ori r4, r4, CONFIG_SYS_IBAT3L@l
615 addis r3, r0, CONFIG_SYS_IBAT3U@h
616 ori r3, r3, CONFIG_SYS_IBAT3U@l
621 addis r4, r0, CONFIG_SYS_DBAT3L@h
622 ori r4, r4, CONFIG_SYS_DBAT3L@l
623 addis r3, r0, CONFIG_SYS_DBAT3U@h
624 ori r3, r3, CONFIG_SYS_DBAT3U@l
628 #ifdef CONFIG_HIGH_BATS
630 addis r4, r0, CONFIG_SYS_IBAT4L@h
631 ori r4, r4, CONFIG_SYS_IBAT4L@l
632 addis r3, r0, CONFIG_SYS_IBAT4U@h
633 ori r3, r3, CONFIG_SYS_IBAT4U@l
638 addis r4, r0, CONFIG_SYS_DBAT4L@h
639 ori r4, r4, CONFIG_SYS_DBAT4L@l
640 addis r3, r0, CONFIG_SYS_DBAT4U@h
641 ori r3, r3, CONFIG_SYS_DBAT4U@l
646 addis r4, r0, CONFIG_SYS_IBAT5L@h
647 ori r4, r4, CONFIG_SYS_IBAT5L@l
648 addis r3, r0, CONFIG_SYS_IBAT5U@h
649 ori r3, r3, CONFIG_SYS_IBAT5U@l
654 addis r4, r0, CONFIG_SYS_DBAT5L@h
655 ori r4, r4, CONFIG_SYS_DBAT5L@l
656 addis r3, r0, CONFIG_SYS_DBAT5U@h
657 ori r3, r3, CONFIG_SYS_DBAT5U@l
662 addis r4, r0, CONFIG_SYS_IBAT6L@h
663 ori r4, r4, CONFIG_SYS_IBAT6L@l
664 addis r3, r0, CONFIG_SYS_IBAT6U@h
665 ori r3, r3, CONFIG_SYS_IBAT6U@l
670 addis r4, r0, CONFIG_SYS_DBAT6L@h
671 ori r4, r4, CONFIG_SYS_DBAT6L@l
672 addis r3, r0, CONFIG_SYS_DBAT6U@h
673 ori r3, r3, CONFIG_SYS_DBAT6U@l
678 addis r4, r0, CONFIG_SYS_IBAT7L@h
679 ori r4, r4, CONFIG_SYS_IBAT7L@l
680 addis r3, r0, CONFIG_SYS_IBAT7U@h
681 ori r3, r3, CONFIG_SYS_IBAT7U@l
686 addis r4, r0, CONFIG_SYS_DBAT7L@h
687 ori r4, r4, CONFIG_SYS_DBAT7L@l
688 addis r3, r0, CONFIG_SYS_DBAT7U@h
689 ori r3, r3, CONFIG_SYS_DBAT7U@l
696 /* invalidate all tlb's
698 * From the 603e User Manual: "The 603e provides the ability to
699 * invalidate a TLB entry. The TLB Invalidate Entry (tlbie)
700 * instruction invalidates the TLB entry indexed by the EA, and
701 * operates on both the instruction and data TLBs simultaneously
702 * invalidating four TLB entries (both sets in each TLB). The
703 * index corresponds to bits 15-19 of the EA. To invalidate all
704 * entries within both TLBs, 32 tlbie instructions should be
705 * issued, incrementing this field by one each time."
707 * "Note that the tlbia instruction is not implemented on the
710 * bits 15-19 correspond to addresses 0x00000000 to 0x0001F000
711 * incrementing by 0x1000 each time. The code below is sort of
712 * based on code in "flush_tlbs" from arch/powerpc/kernel/head.S
728 * Note: requires that all cache bits in
729 * HID0 are in the low half word.
731 #ifndef CONFIG_NAND_SPL
736 li r4, HID0_ICFI|HID0_ILOCK
738 ori r4, r3, HID0_ICFI
740 mtspr HID0, r4 /* sets enable and invalidate, clears lock */
742 mtspr HID0, r3 /* clears invalidate */
745 .globl icache_disable
749 ori r4, r4, HID0_ICE|HID0_ICFI|HID0_ILOCK
752 mtspr HID0, r3 /* clears invalidate, enable and lock */
758 rlwinm r3, r3, (31 - HID0_ICE_SHIFT + 1), 31, 31
760 #endif /* !CONFIG_NAND_SPL */
765 li r5, HID0_DCFI|HID0_DLOCK
769 mtspr HID0, r3 /* enable, no invalidate */
772 .globl dcache_disable
775 bl flush_dcache /* uses r3 and r5 */
777 li r5, HID0_DCE|HID0_DLOCK
779 ori r5, r3, HID0_DCFI
781 mtspr HID0, r5 /* sets invalidate, clears enable and lock */
783 mtspr HID0, r3 /* clears invalidate */
790 rlwinm r3, r3, (31 - HID0_DCE_SHIFT + 1), 31, 31
796 lis r5, CONFIG_SYS_CACHELINE_SIZE
800 lis r5, CONFIG_SYS_CACHELINE_SIZE
805 /*-------------------------------------------------------------------*/
808 * void relocate_code (addr_sp, gd, addr_moni)
810 * This "function" does not return, instead it continues in RAM
811 * after relocating the monitor code.
815 * r5 = length in bytes
820 mr r1, r3 /* Set new stack pointer */
821 mr r9, r4 /* Save copy of Global Data pointer */
822 mr r10, r5 /* Save copy of Destination Address */
825 mr r3, r5 /* Destination Address */
826 lis r4, CONFIG_SYS_MONITOR_BASE@h /* Source Address */
827 ori r4, r4, CONFIG_SYS_MONITOR_BASE@l
828 lwz r5, GOT(__bss_start)
830 li r6, CONFIG_SYS_CACHELINE_SIZE /* Cache Line Size */
835 * New GOT-PTR = (old GOT-PTR - CONFIG_SYS_MONITOR_BASE)
836 * + Destination Address
842 /* First our own GOT */
844 /* then the one used by the C code */
854 beq cr1,4f /* In place copy is not necessary */
855 beq 7f /* Protect against 0 count */
884 2: slwi r0,r0,2 /* re copy in reverse order ... y do we needed it? */
892 * Now flush the cache: note that we must start from a cache aligned
893 * address. Otherwise we might miss one cache line.
897 beq 7f /* Always flush prefetch queue in any case */
905 sync /* Wait for all dcbst to complete on bus */
911 7: sync /* Wait for all icbi to complete on bus */
915 * We are done. Do not return, instead branch to second part of board
916 * initialization, now running from RAM.
918 addi r0, r10, in_ram - _start + EXC_OFF_SYS_RESET
925 * Relocation Function, r12 point to got2+0x8000
927 * Adjust got2 pointers, no need to check for 0, this code
928 * already puts a few entries in the table.
930 li r0,__got2_entries@sectoff@l
931 la r3,GOT(_GOT2_TABLE_)
932 lwz r11,GOT(_GOT2_TABLE_)
943 #ifndef CONFIG_NAND_SPL
945 * Now adjust the fixups and the pointers to the fixups
946 * in case we need to move ourselves again.
948 li r0,__fixup_entries@sectoff@l
949 lwz r3,GOT(_FIXUP_TABLE_)
967 * Now clear BSS segment
969 lwz r3,GOT(__bss_start)
970 #if defined(CONFIG_HYMOD)
972 * For HYMOD - the environment is the very last item in flash.
973 * The real .bss stops just before environment starts, so only
974 * clear up to that point.
976 * taken from mods for FADS board
978 lwz r4,GOT(environment)
980 lwz r4,GOT(__bss_end__)
994 mr r3, r9 /* Global Data pointer */
995 mr r4, r10 /* Destination Address */
998 #ifndef CONFIG_NAND_SPL
1000 * Copy exception vector code to low memory
1003 * r7: source address, r8: end address, r9: target address
1007 mflr r4 /* save link register */
1010 lwz r8, GOT(_end_of_vectors)
1012 li r9, 0x100 /* reset vector always at 0x100 */
1015 bgelr /* return if r7>=r8 - just in case */
1025 * relocate `hdlr' and `int_return' entries
1027 li r7, .L_MachineCheck - _start + EXC_OFF_SYS_RESET
1028 li r8, Alignment - _start + EXC_OFF_SYS_RESET
1031 addi r7, r7, 0x100 /* next exception vector */
1035 li r7, .L_Alignment - _start + EXC_OFF_SYS_RESET
1038 li r7, .L_ProgramCheck - _start + EXC_OFF_SYS_RESET
1041 li r7, .L_FPUnavailable - _start + EXC_OFF_SYS_RESET
1042 li r8, SystemCall - _start + EXC_OFF_SYS_RESET
1045 addi r7, r7, 0x100 /* next exception vector */
1049 li r7, .L_SingleStep - _start + EXC_OFF_SYS_RESET
1050 li r8, _end_of_vectors - _start + EXC_OFF_SYS_RESET
1053 addi r7, r7, 0x100 /* next exception vector */
1057 mfmsr r3 /* now that the vectors have */
1058 lis r7, MSR_IP@h /* relocated into low memory */
1059 ori r7, r7, MSR_IP@l /* MSR[IP] can be turned off */
1060 andc r3, r3, r7 /* (if it was on) */
1061 SYNC /* Some chip revs need this... */
1065 mtlr r4 /* restore link register */
1068 #endif /* !CONFIG_NAND_SPL */
1070 #ifdef CONFIG_SYS_INIT_RAM_LOCK
1072 /* Allocate Initial RAM in data cache.
1074 lis r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@h
1075 ori r3, r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@l
1076 li r4, ((CONFIG_SYS_INIT_RAM_SIZE & ~31) + \
1077 (CONFIG_SYS_INIT_RAM_ADDR & 31) + 31) / 32
1084 /* Lock the data cache */
1086 ori r0, r0, HID0_DLOCK
1092 #ifndef CONFIG_NAND_SPL
1093 .globl unlock_ram_in_cache
1094 unlock_ram_in_cache:
1095 /* invalidate the INIT_RAM section */
1096 lis r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@h
1097 ori r3, r3, (CONFIG_SYS_INIT_RAM_ADDR & ~31)@l
1098 li r4, ((CONFIG_SYS_INIT_RAM_SIZE & ~31) + \
1099 (CONFIG_SYS_INIT_RAM_ADDR & 31) + 31) / 32
1105 sync /* Wait for all icbi to complete on bus */
1108 /* Unlock the data cache and invalidate it */
1110 li r5, HID0_DLOCK|HID0_DCFI
1111 andc r3, r3, r5 /* no invalidate, unlock */
1112 ori r5, r3, HID0_DCFI /* invalidate, unlock */
1114 mtspr HID0, r5 /* invalidate, unlock */
1116 mtspr HID0, r3 /* no invalidate, unlock */
1118 #endif /* !CONFIG_NAND_SPL */
1119 #endif /* CONFIG_SYS_INIT_RAM_LOCK */
1121 #ifdef CONFIG_SYS_FLASHBOOT
1123 /* When booting from ROM (Flash or EPROM), clear the */
1124 /* Address Mask in OR0 so ROM appears everywhere */
1125 /*----------------------------------------------------*/
1126 lis r3, (CONFIG_SYS_IMMR)@h /* r3 <= CONFIG_SYS_IMMR */
1128 li r5, 0x7fff /* r5 <= 0x00007FFFF */
1130 stw r4, OR0@l(r3) /* OR0 <= OR0 & 0x00007FFFF */
1132 /* As MPC8349E User's Manual presented, when RCW[BMS] is set to 0,
1133 * system will boot from 0x0000_0100, and the LBLAWBAR0[BASE_ADDR]
1134 * reset value is 0x00000; when RCW[BMS] is set to 1, system will boot
1135 * from 0xFFF0_0100, and the LBLAWBAR0[BASE_ADDR] reset value is
1136 * 0xFF800. From the hard resetting to here, the processor fetched and
1137 * executed the instructions one by one. There is not absolutely
1138 * jumping happened. Laterly, the u-boot code has to do an absolutely
1139 * jumping to tell the CPU instruction fetching component what the
1140 * u-boot TEXT base address is. Because the TEXT base resides in the
1141 * boot ROM memory space, to garantee the code can run smoothly after
1142 * that jumping, we must map in the entire boot ROM by Local Access
1143 * Window. Sometimes, we desire an non-0x00000 or non-0xFF800 starting
1144 * address for boot ROM, such as 0xFE000000. In this case, the default
1145 * LBIU Local Access Widow 0 will not cover this memory space. So, we
1146 * need another window to map in it.
1148 lis r4, (CONFIG_SYS_FLASH_BASE)@h
1149 ori r4, r4, (CONFIG_SYS_FLASH_BASE)@l
1150 stw r4, LBLAWBAR1(r3) /* LBLAWBAR1 <= CONFIG_SYS_FLASH_BASE */
1152 /* Store 0x80000012 + log2(CONFIG_SYS_FLASH_SIZE) into LBLAWAR1 */
1153 lis r4, (0x80000012)@h
1154 ori r4, r4, (0x80000012)@l
1155 li r5, CONFIG_SYS_FLASH_SIZE
1156 1: srawi. r5, r5, 1 /* r5 = r5 >> 1 */
1160 stw r4, LBLAWAR1(r3) /* LBLAWAR1 <= 8MB Flash Size */
1161 /* Wait for HW to catch up */
1162 lwz r4, LBLAWAR1(r3)
1167 /* Though all the LBIU Local Access Windows and LBC Banks will be
1168 * initialized in the C code, we'd better configure boot ROM's
1169 * window 0 and bank 0 correctly at here.
1171 remap_flash_by_law0:
1172 /* Initialize the BR0 with the boot ROM starting address. */
1176 lis r5, (CONFIG_SYS_FLASH_BASE & 0xFFFF8000)@h
1177 ori r5, r5, (CONFIG_SYS_FLASH_BASE & 0xFFFF8000)@l
1179 stw r5, BR0(r3) /* r5 <= (CONFIG_SYS_FLASH_BASE & 0xFFFF8000) | (BR0 & 0x00007FFF) */
1182 lis r5, ~((CONFIG_SYS_FLASH_SIZE << 4) - 1)
1186 lis r4, (CONFIG_SYS_FLASH_BASE)@h
1187 ori r4, r4, (CONFIG_SYS_FLASH_BASE)@l
1188 stw r4, LBLAWBAR0(r3) /* LBLAWBAR0 <= CONFIG_SYS_FLASH_BASE */
1190 /* Store 0x80000012 + log2(CONFIG_SYS_FLASH_SIZE) into LBLAWAR0 */
1191 lis r4, (0x80000012)@h
1192 ori r4, r4, (0x80000012)@l
1193 li r5, CONFIG_SYS_FLASH_SIZE
1194 1: srawi. r5, r5, 1 /* r5 = r5 >> 1 */
1197 stw r4, LBLAWAR0(r3) /* LBLAWAR0 <= Flash Size */
1201 stw r4, LBLAWBAR1(r3)
1202 stw r4, LBLAWAR1(r3) /* Off LBIU LAW1 */
1203 /* Wait for HW to catch up */
1204 lwz r4, LBLAWAR1(r3)
1208 #endif /* CONFIG_SYS_FLASHBOOT */