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 (C) 2007 Stefan Roese <sr@denx.de>, DENX Software Engineering
6 * Copyright (c) 2008 Nuovation System Designs, LLC
7 * Grant Erickson <gerickson@nuovations.com>
9 * See file CREDITS for list of people who contributed to this
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation; either version 2 of
15 * the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27 /*------------------------------------------------------------------------------+
28 * This source code is dual-licensed. You may use it under the terms of the
29 * GNU General Public License version 2, or under the license below.
31 * This source code has been made available to you by IBM on an AS-IS
32 * basis. Anyone receiving this source is licensed under IBM
33 * copyrights to use it in any way he or she deems fit, including
34 * copying it, modifying it, compiling it, and redistributing it either
35 * with or without modifications. No license under IBM patents or
36 * patent applications is to be implied by the copyright license.
38 * Any user of this software should understand that IBM cannot provide
39 * technical support for this software and will not be responsible for
40 * any consequences resulting from the use of this software.
42 * Any person who transfers this source code or any derivative work
43 * must include the IBM copyright notice, this paragraph, and the
44 * preceding two paragraphs in the transferred software.
46 * COPYRIGHT I B M CORPORATION 1995
47 * LICENSED MATERIAL - PROGRAM PROPERTY OF I B M
48 *-------------------------------------------------------------------------------
51 /* U-Boot - Startup Code for AMCC 4xx PowerPC based Embedded Boards
54 * The processor starts at 0xfffffffc and the code is executed
56 * in memory, but as long we don't jump around before relocating.
57 * board_init lies at a quite high address and when the cpu has
58 * jumped there, everything is ok.
59 * This works because the cpu gives the FLASH (CS0) the whole
60 * address space at startup, and board_init lies as a echo of
61 * the flash somewhere up there in the memorymap.
63 * board_init will change CS0 to be positioned at the correct
64 * address and (s)dram will be positioned at address 0
67 #include <asm/ppc4xx.h>
68 #include <timestamp.h>
71 #define _LINUX_CONFIG_H 1 /* avoid reading Linux autoconf.h file */
73 #include <ppc_asm.tmpl>
76 #include <asm/cache.h>
78 #include <asm/ppc4xx-isram.h>
80 #ifndef CONFIG_IDENT_STRING
81 #define CONFIG_IDENT_STRING ""
84 #ifdef CONFIG_SYS_INIT_DCACHE_CS
85 # if (CONFIG_SYS_INIT_DCACHE_CS == 0)
88 # if (defined(CONFIG_SYS_EBC_PB0AP) && defined(CONFIG_SYS_EBC_PB0CR))
89 # define PBxAP_VAL CONFIG_SYS_EBC_PB0AP
90 # define PBxCR_VAL CONFIG_SYS_EBC_PB0CR
93 # if (CONFIG_SYS_INIT_DCACHE_CS == 1)
96 # if (defined(CONFIG_SYS_EBC_PB1AP) && defined(CONFIG_SYS_EBC_PB1CR))
97 # define PBxAP_VAL CONFIG_SYS_EBC_PB1AP
98 # define PBxCR_VAL CONFIG_SYS_EBC_PB1CR
101 # if (CONFIG_SYS_INIT_DCACHE_CS == 2)
104 # if (defined(CONFIG_SYS_EBC_PB2AP) && defined(CONFIG_SYS_EBC_PB2CR))
105 # define PBxAP_VAL CONFIG_SYS_EBC_PB2AP
106 # define PBxCR_VAL CONFIG_SYS_EBC_PB2CR
109 # if (CONFIG_SYS_INIT_DCACHE_CS == 3)
112 # if (defined(CONFIG_SYS_EBC_PB3AP) && defined(CONFIG_SYS_EBC_PB3CR))
113 # define PBxAP_VAL CONFIG_SYS_EBC_PB3AP
114 # define PBxCR_VAL CONFIG_SYS_EBC_PB3CR
117 # if (CONFIG_SYS_INIT_DCACHE_CS == 4)
120 # if (defined(CONFIG_SYS_EBC_PB4AP) && defined(CONFIG_SYS_EBC_PB4CR))
121 # define PBxAP_VAL CONFIG_SYS_EBC_PB4AP
122 # define PBxCR_VAL CONFIG_SYS_EBC_PB4CR
125 # if (CONFIG_SYS_INIT_DCACHE_CS == 5)
128 # if (defined(CONFIG_SYS_EBC_PB5AP) && defined(CONFIG_SYS_EBC_PB5CR))
129 # define PBxAP_VAL CONFIG_SYS_EBC_PB5AP
130 # define PBxCR_VAL CONFIG_SYS_EBC_PB5CR
133 # if (CONFIG_SYS_INIT_DCACHE_CS == 6)
136 # if (defined(CONFIG_SYS_EBC_PB6AP) && defined(CONFIG_SYS_EBC_PB6CR))
137 # define PBxAP_VAL CONFIG_SYS_EBC_PB6AP
138 # define PBxCR_VAL CONFIG_SYS_EBC_PB6CR
141 # if (CONFIG_SYS_INIT_DCACHE_CS == 7)
144 # if (defined(CONFIG_SYS_EBC_PB7AP) && defined(CONFIG_SYS_EBC_PB7CR))
145 # define PBxAP_VAL CONFIG_SYS_EBC_PB7AP
146 # define PBxCR_VAL CONFIG_SYS_EBC_PB7CR
156 * Memory Bank x (nothingness) initialization CONFIG_SYS_INIT_RAM_ADDR + 64 MiB
157 * used as temporary stack pointer for the primordial stack
159 # ifndef CONFIG_SYS_INIT_DCACHE_PBxAR
160 # define CONFIG_SYS_INIT_DCACHE_PBxAR (EBC_BXAP_BME_DISABLED | \
161 EBC_BXAP_TWT_ENCODE(7) | \
162 EBC_BXAP_BCE_DISABLE | \
163 EBC_BXAP_BCT_2TRANS | \
164 EBC_BXAP_CSN_ENCODE(0) | \
165 EBC_BXAP_OEN_ENCODE(0) | \
166 EBC_BXAP_WBN_ENCODE(0) | \
167 EBC_BXAP_WBF_ENCODE(0) | \
168 EBC_BXAP_TH_ENCODE(2) | \
169 EBC_BXAP_RE_DISABLED | \
170 EBC_BXAP_SOR_NONDELAYED | \
171 EBC_BXAP_BEM_WRITEONLY | \
172 EBC_BXAP_PEN_DISABLED)
173 # endif /* CONFIG_SYS_INIT_DCACHE_PBxAR */
174 # ifndef CONFIG_SYS_INIT_DCACHE_PBxCR
175 # define CONFIG_SYS_INIT_DCACHE_PBxCR (EBC_BXCR_BAS_ENCODE(CONFIG_SYS_INIT_RAM_ADDR) | \
179 # endif /* CONFIG_SYS_INIT_DCACHE_PBxCR */
180 # ifndef CONFIG_SYS_INIT_RAM_PATTERN
181 # define CONFIG_SYS_INIT_RAM_PATTERN 0xDEADDEAD
183 #endif /* CONFIG_SYS_INIT_DCACHE_CS */
185 #if (defined(CONFIG_SYS_INIT_RAM_DCACHE) && (CONFIG_SYS_INIT_RAM_END > (4 << 10)))
186 #error Only 4k of init-ram is supported - please adjust CONFIG_SYS_INIT_RAM_END!
190 * Unless otherwise overriden, enable two 128MB cachable instruction regions
191 * at CONFIG_SYS_SDRAM_BASE and another 128MB cacheable instruction region covering
192 * NOR flash at CONFIG_SYS_FLASH_BASE. Disable all cacheable data regions.
194 #if !defined(CONFIG_SYS_FLASH_BASE)
195 /* If not already defined, set it to the "last" 128MByte region */
196 # define CONFIG_SYS_FLASH_BASE 0xf8000000
198 #if !defined(CONFIG_SYS_ICACHE_SACR_VALUE)
199 # define CONFIG_SYS_ICACHE_SACR_VALUE \
200 (PPC_128MB_SACR_VALUE(CONFIG_SYS_SDRAM_BASE + ( 0 << 20)) | \
201 PPC_128MB_SACR_VALUE(CONFIG_SYS_SDRAM_BASE + (128 << 20)) | \
202 PPC_128MB_SACR_VALUE(CONFIG_SYS_FLASH_BASE))
203 #endif /* !defined(CONFIG_SYS_ICACHE_SACR_VALUE) */
205 #if !defined(CONFIG_SYS_DCACHE_SACR_VALUE)
206 # define CONFIG_SYS_DCACHE_SACR_VALUE \
208 #endif /* !defined(CONFIG_SYS_DCACHE_SACR_VALUE) */
210 #if !defined(CONFIG_SYS_TLB_FOR_BOOT_FLASH)
211 #define CONFIG_SYS_TLB_FOR_BOOT_FLASH 0 /* use TLB 0 as default */
214 #define function_prolog(func_name) .text; \
218 #define function_epilog(func_name) .type func_name,@function; \
219 .size func_name,.-func_name
221 /* We don't want the MMU yet.
224 #define MSR_KERNEL ( MSR_ME ) /* Machine Check */
227 .extern ext_bus_cntlr_init
228 #ifdef CONFIG_NAND_U_BOOT
229 .extern reconfig_tlb0
233 * Set up GOT: Global Offset Table
235 * Use r12 to access the GOT
237 #if !defined(CONFIG_NAND_SPL)
239 GOT_ENTRY(_GOT2_TABLE_)
240 GOT_ENTRY(_FIXUP_TABLE_)
243 GOT_ENTRY(_start_of_vectors)
244 GOT_ENTRY(_end_of_vectors)
245 GOT_ENTRY(transfer_to_handler)
247 GOT_ENTRY(__init_end)
249 GOT_ENTRY(__bss_start)
251 #endif /* CONFIG_NAND_SPL */
253 #if defined(CONFIG_NAND_U_BOOT) && !defined(CONFIG_NAND_SPL)
255 * NAND U-Boot image is started from offset 0
258 #if defined(CONFIG_440)
262 bl cpu_init_f /* run low-level CPU init code (from Flash) */
266 #if defined(CONFIG_SYS_RAMBOOT)
268 * 4xx RAM-booting U-Boot image is started from offset 0
275 * 440 Startup -- on reset only the top 4k of the effective
276 * address space is mapped in by an entry in the instruction
277 * and data shadow TLB. The .bootpg section is located in the
278 * top 4k & does only what's necessary to map in the the rest
279 * of the boot rom. Once the boot rom is mapped in we can
280 * proceed with normal startup.
282 * NOTE: CS0 only covers the top 2MB of the effective address
286 #if defined(CONFIG_440)
287 #if !defined(CONFIG_NAND_SPL)
288 .section .bootpg,"ax"
292 /**************************************************************************/
294 /*--------------------------------------------------------------------+
295 | 440EPX BUP Change - Hardware team request
296 +--------------------------------------------------------------------*/
297 #if defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
302 /*----------------------------------------------------------------+
303 | Core bug fix. Clear the esr
304 +-----------------------------------------------------------------*/
307 /*----------------------------------------------------------------*/
308 /* Clear and set up some registers. */
309 /*----------------------------------------------------------------*/
310 iccci r0,r0 /* NOTE: operands not used for 440 */
311 dccci r0,r0 /* NOTE: operands not used for 440 */
318 /* NOTE: 440GX adds machine check status regs */
319 #if defined(CONFIG_440) && !defined(CONFIG_440GP)
326 /*----------------------------------------------------------------*/
328 /*----------------------------------------------------------------*/
329 /* Disable store gathering & broadcast, guarantee inst/data
330 * cache block touch, force load/store alignment
331 * (see errata 1.12: 440_33)
333 lis r1,0x0030 /* store gathering & broadcast disable */
334 ori r1,r1,0x6000 /* cache touch */
337 /*----------------------------------------------------------------*/
338 /* Initialize debug */
339 /*----------------------------------------------------------------*/
341 andis. r1, r1, 0x8000 /* test DBCR0[EDM] bit */
342 bne skip_debug_init /* if set, don't clear debug register */
344 ori r1,r1,CCR0_DTB@l /* Disable Trace Broadcast */
358 mtspr SPRN_DBSR,r1 /* Clear all valid bits */
361 #if defined (CONFIG_440SPE)
362 /*----------------------------------------------------------------+
363 | Initialize Core Configuration Reg1.
364 | a. ICDPEI: Record even parity. Normal operation.
365 | b. ICTPEI: Record even parity. Normal operation.
366 | c. DCTPEI: Record even parity. Normal operation.
367 | d. DCDPEI: Record even parity. Normal operation.
368 | e. DCUPEI: Record even parity. Normal operation.
369 | f. DCMPEI: Record even parity. Normal operation.
370 | g. FCOM: Normal operation
371 | h. MMUPEI: Record even parity. Normal operation.
372 | i. FFF: Flush only as much data as necessary.
373 | j. TCS: Timebase increments from CPU clock.
374 +-----------------------------------------------------------------*/
378 /*----------------------------------------------------------------+
379 | Reset the timebase.
380 | The previous write to CCR1 sets the timebase source.
381 +-----------------------------------------------------------------*/
386 /*----------------------------------------------------------------*/
387 /* Setup interrupt vectors */
388 /*----------------------------------------------------------------*/
389 mtspr SPRN_IVPR,r0 /* Vectors start at 0x0000_0000 */
391 mtspr SPRN_IVOR0,r1 /* Critical input */
393 mtspr SPRN_IVOR1,r1 /* Machine check */
395 mtspr SPRN_IVOR2,r1 /* Data storage */
397 mtspr SPRN_IVOR3,r1 /* Instruction storage */
399 mtspr SPRN_IVOR4,r1 /* External interrupt */
401 mtspr SPRN_IVOR5,r1 /* Alignment */
403 mtspr SPRN_IVOR6,r1 /* Program check */
405 mtspr SPRN_IVOR7,r1 /* Floating point unavailable */
407 mtspr SPRN_IVOR8,r1 /* System call */
409 mtspr SPRN_IVOR9,r1 /* Auxiliary Processor unavailable */
411 mtspr SPRN_IVOR10,r1 /* Decrementer */
413 mtspr SPRN_IVOR13,r1 /* Data TLB error */
415 mtspr SPRN_IVOR14,r1 /* Instr TLB error */
417 mtspr SPRN_IVOR15,r1 /* Debug */
419 /*----------------------------------------------------------------*/
420 /* Configure cache regions */
421 /*----------------------------------------------------------------*/
439 /*----------------------------------------------------------------*/
440 /* Cache victim limits */
441 /*----------------------------------------------------------------*/
442 /* floors 0, ceiling max to use the entire cache -- nothing locked
449 /*----------------------------------------------------------------+
450 |Initialize MMUCR[STID] = 0.
451 +-----------------------------------------------------------------*/
458 /*----------------------------------------------------------------*/
459 /* Clear all TLB entries -- TID = 0, TS = 0 */
460 /*----------------------------------------------------------------*/
462 #ifdef CONFIG_SYS_RAMBOOT
463 li r4,0 /* Start with TLB #0 */
465 li r4,1 /* Start with TLB #1 */
467 li r1,64 /* 64 TLB entries */
468 sub r1,r1,r4 /* calculate last TLB # */
471 #ifdef CONFIG_SYS_RAMBOOT
472 tlbre r3,r4,0 /* Read contents from TLB word #0 to get EPN */
473 rlwinm. r3,r3,0,0xfffffc00 /* Mask EPN */
474 beq tlbnxt /* Skip EPN=0 TLB, this is the SDRAM TLB */
476 tlbwe r0,r4,0 /* Invalidate all entries (V=0)*/
479 tlbnxt: addi r4,r4,1 /* Next TLB */
482 /*----------------------------------------------------------------*/
483 /* TLB entry setup -- step thru tlbtab */
484 /*----------------------------------------------------------------*/
485 #if defined(CONFIG_440SPE_REVA)
486 /*----------------------------------------------------------------*/
487 /* We have different TLB tables for revA and rev B of 440SPe */
488 /*----------------------------------------------------------------*/
500 bl tlbtab /* Get tlbtab pointer */
503 li r1,0x003f /* 64 TLB entries max */
509 #ifdef CONFIG_SYS_RAMBOOT
510 tlbre r3,r4,0 /* Read contents from TLB word #0 */
511 rlwinm. r3,r3,0,0x00000200 /* Mask V (valid) bit */
512 bne tlbnx2 /* Skip V=1 TLB, this is the SDRAM TLB */
516 beq 2f /* 0 marks end */
519 tlbwe r0,r4,0 /* TLB Word 0 */
520 tlbwe r1,r4,1 /* TLB Word 1 */
521 tlbwe r2,r4,2 /* TLB Word 2 */
522 tlbnx2: addi r4,r4,1 /* Next TLB */
525 /*----------------------------------------------------------------*/
526 /* Continue from 'normal' start */
527 /*----------------------------------------------------------------*/
533 mtspr SPRN_SRR1,r0 /* Keep things disabled for now */
537 #endif /* CONFIG_440 */
540 * r3 - 1st arg to board_init(): IMMP pointer
541 * r4 - 2nd arg to board_init(): boot flag
543 #ifndef CONFIG_NAND_SPL
545 .long 0x27051956 /* U-Boot Magic Number */
546 .globl version_string
548 .ascii U_BOOT_VERSION
549 .ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")"
550 .ascii CONFIG_IDENT_STRING, "\0"
552 . = EXC_OFF_SYS_RESET
553 .globl _start_of_vectors
556 /* Critical input. */
557 CRIT_EXCEPTION(0x100, CritcalInput, UnknownException)
561 MCK_EXCEPTION(0x200, MachineCheck, MachineCheckException)
563 CRIT_EXCEPTION(0x200, MachineCheck, MachineCheckException)
564 #endif /* CONFIG_440 */
566 /* Data Storage exception. */
567 STD_EXCEPTION(0x300, DataStorage, UnknownException)
569 /* Instruction Storage exception. */
570 STD_EXCEPTION(0x400, InstStorage, UnknownException)
572 /* External Interrupt exception. */
573 STD_EXCEPTION(0x500, ExtInterrupt, external_interrupt)
575 /* Alignment exception. */
578 EXCEPTION_PROLOG(SRR0, SRR1)
583 addi r3,r1,STACK_FRAME_OVERHEAD
584 EXC_XFER_TEMPLATE(Alignment, AlignmentException, MSR_KERNEL, COPY_EE)
586 /* Program check exception */
589 EXCEPTION_PROLOG(SRR0, SRR1)
590 addi r3,r1,STACK_FRAME_OVERHEAD
591 EXC_XFER_TEMPLATE(ProgramCheck, ProgramCheckException,
595 STD_EXCEPTION(0x800, FPUnavailable, UnknownException)
596 STD_EXCEPTION(0x900, Decrementer, DecrementerPITException)
597 STD_EXCEPTION(0xa00, APU, UnknownException)
599 STD_EXCEPTION(0xc00, SystemCall, UnknownException)
602 STD_EXCEPTION(0x1300, DataTLBError, UnknownException)
603 STD_EXCEPTION(0x1400, InstructionTLBError, UnknownException)
605 STD_EXCEPTION(0x1000, PIT, DecrementerPITException)
606 STD_EXCEPTION(0x1100, InstructionTLBMiss, UnknownException)
607 STD_EXCEPTION(0x1200, DataTLBMiss, UnknownException)
609 CRIT_EXCEPTION(0x2000, DebugBreakpoint, DebugException )
611 .globl _end_of_vectors
618 /*****************************************************************************/
619 #if defined(CONFIG_440)
621 /*----------------------------------------------------------------*/
622 /* Clear and set up some registers. */
623 /*----------------------------------------------------------------*/
626 mtspr SPRN_DEC,r0 /* prevent dec exceptions */
627 mtspr SPRN_TBWL,r0 /* prevent fit & wdt exceptions */
629 mtspr SPRN_TSR,r1 /* clear all timer exception status */
630 mtspr SPRN_TCR,r0 /* disable all */
631 mtspr SPRN_ESR,r0 /* clear exception syndrome register */
632 mtxer r0 /* clear integer exception register */
634 /*----------------------------------------------------------------*/
635 /* Debug setup -- some (not very good) ice's need an event*/
636 /* to establish control :-( Define CONFIG_SYS_INIT_DBCR to the dbsr */
637 /* value you need in this case 0x8cff 0000 should do the trick */
638 /*----------------------------------------------------------------*/
639 #if defined(CONFIG_SYS_INIT_DBCR)
642 mtspr SPRN_DBSR,r1 /* Clear all status bits */
643 lis r0,CONFIG_SYS_INIT_DBCR@h
644 ori r0,r0,CONFIG_SYS_INIT_DBCR@l
649 /*----------------------------------------------------------------*/
650 /* Setup the internal SRAM */
651 /*----------------------------------------------------------------*/
654 #ifdef CONFIG_SYS_INIT_RAM_DCACHE
655 /* Clear Dcache to use as RAM */
656 addis r3,r0,CONFIG_SYS_INIT_RAM_ADDR@h
657 ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l
658 addis r4,r0,CONFIG_SYS_INIT_RAM_END@h
659 ori r4,r4,CONFIG_SYS_INIT_RAM_END@l
660 rlwinm. r5,r4,0,27,31
672 * Lock the init-ram/stack in d-cache, so that other regions
673 * may use d-cache as well
674 * Note, that this current implementation locks exactly 4k
675 * of d-cache, so please make sure that you don't define a
676 * bigger init-ram area. Take a look at the lwmon5 440EPx
677 * implementation as a reference.
681 /* 8. set TFLOOR/NFLOOR to 8 (-> 8*16*32 bytes locked -> 4k) */
697 #endif /* CONFIG_SYS_INIT_RAM_DCACHE */
699 /* 440EP & 440GR are only 440er PPC's without internal SRAM */
700 #if !defined(CONFIG_440EP) && !defined(CONFIG_440GR)
701 /* not all PPC's have internal SRAM usable as L2-cache */
702 #if defined(CONFIG_440GX) || \
703 defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
704 defined(CONFIG_460SX)
705 mtdcr L2_CACHE_CFG,r0 /* Ensure L2 Cache is off */
706 #elif defined(CONFIG_460EX) || defined(CONFIG_460GT)
708 ori r1,r1,0x0008 /* Set L2_CACHE_CFG[RDBW]=1 */
709 mtdcr L2_CACHE_CFG,r1
715 and r1,r1,r2 /* Disable parity check */
718 and r1,r1,r2 /* Disable pwr mgmt */
721 lis r1,0x8000 /* BAS = 8000_0000 */
722 #if defined(CONFIG_440GX) || defined(CONFIG_440SP)
723 ori r1,r1,0x0980 /* first 64k */
724 mtdcr ISRAM0_SB0CR,r1
726 ori r1,r1,0x0980 /* second 64k */
727 mtdcr ISRAM0_SB1CR,r1
729 ori r1,r1, 0x0980 /* third 64k */
730 mtdcr ISRAM0_SB2CR,r1
732 ori r1,r1, 0x0980 /* fourth 64k */
733 mtdcr ISRAM0_SB3CR,r1
734 #elif defined(CONFIG_440SPE) || defined(CONFIG_460EX) || defined(CONFIG_460GT)
735 lis r1,0x0000 /* BAS = X_0000_0000 */
736 ori r1,r1,0x0984 /* first 64k */
737 mtdcr ISRAM0_SB0CR,r1
739 ori r1,r1,0x0984 /* second 64k */
740 mtdcr ISRAM0_SB1CR,r1
742 ori r1,r1, 0x0984 /* third 64k */
743 mtdcr ISRAM0_SB2CR,r1
745 ori r1,r1, 0x0984 /* fourth 64k */
746 mtdcr ISRAM0_SB3CR,r1
747 #if defined(CONFIG_460EX) || defined(CONFIG_460GT)
751 and r1,r1,r2 /* Disable parity check */
754 and r1,r1,r2 /* Disable pwr mgmt */
757 lis r1,0x0004 /* BAS = 4_0004_0000 */
758 ori r1,r1,0x0984 /* 64k */
759 mtdcr ISRAM1_SB0CR,r1
761 #elif defined(CONFIG_460SX)
762 lis r1,0x0000 /* BAS = 0000_0000 */
763 ori r1,r1,0x0B84 /* first 128k */
764 mtdcr ISRAM0_SB0CR,r1
766 ori r1,r1,0x0B84 /* second 128k */
767 mtdcr ISRAM0_SB1CR,r1
769 ori r1,r1, 0x0B84 /* third 128k */
770 mtdcr ISRAM0_SB2CR,r1
772 ori r1,r1, 0x0B84 /* fourth 128k */
773 mtdcr ISRAM0_SB3CR,r1
774 #elif defined(CONFIG_440GP)
775 ori r1,r1,0x0380 /* 8k rw */
776 mtdcr ISRAM0_SB0CR,r1
777 mtdcr ISRAM0_SB1CR,r0 /* Disable bank 1 */
779 #endif /* #if !defined(CONFIG_440EP) && !defined(CONFIG_440GR) */
781 /*----------------------------------------------------------------*/
782 /* Setup the stack in internal SRAM */
783 /*----------------------------------------------------------------*/
784 lis r1,CONFIG_SYS_INIT_RAM_ADDR@h
785 ori r1,r1,CONFIG_SYS_INIT_SP_OFFSET@l
788 stwu r0,-4(r1) /* Terminate call chain */
790 stwu r1,-8(r1) /* Save back chain and move SP */
791 lis r0,RESET_VECTOR@h /* Address of reset vector */
792 ori r0,r0, RESET_VECTOR@l
793 stwu r1,-8(r1) /* Save back chain and move SP */
794 stw r0,+12(r1) /* Save return addr (underflow vect) */
796 #ifdef CONFIG_NAND_SPL
797 bl nand_boot_common /* will not return */
801 bl cpu_init_f /* run low-level CPU init code (from Flash) */
805 #endif /* CONFIG_440 */
807 /*****************************************************************************/
809 /*----------------------------------------------------------------------- */
810 /* Set up some machine state registers. */
811 /*----------------------------------------------------------------------- */
812 addi r0,r0,0x0000 /* initialize r0 to zero */
813 mtspr SPRN_ESR,r0 /* clear Exception Syndrome Reg */
814 mttcr r0 /* timer control register */
815 mtexier r0 /* disable all interrupts */
816 addis r4,r0,0xFFFF /* set r4 to 0xFFFFFFFF (status in the */
817 ori r4,r4,0xFFFF /* dbsr is cleared by setting bits to 1) */
818 mtdbsr r4 /* clear/reset the dbsr */
819 mtexisr r4 /* clear all pending interrupts */
821 mtexier r4 /* enable critical exceptions */
822 addis r4,r0,0x0000 /* assume 403GCX - enable core clk */
823 ori r4,r4,0x4020 /* dbling (no harm done on GA and GC */
824 mtiocr r4 /* since bit not used) & DRC to latch */
825 /* data bus on rising edge of CAS */
826 /*----------------------------------------------------------------------- */
828 /*----------------------------------------------------------------------- */
830 /*----------------------------------------------------------------------- */
831 /* Invalidate i-cache and d-cache TAG arrays. */
832 /*----------------------------------------------------------------------- */
833 addi r3,0,1024 /* 1/4 of I-cache size, half of D-cache */
834 addi r4,0,1024 /* 1/4 of I-cache */
839 addic. r3,r3,-16 /* move back one cache line */
840 bne ..cloop /* loop back to do rest until r3 = 0 */
843 /* initialize IOP480 so it can read 1 MB code area for SRAM spaces */
844 /* this requires enabling MA[17..0], by default only MA[12..0] are enabled. */
847 /* first copy IOP480 register base address into r3 */
848 addis r3,0,0x5000 /* IOP480 register base address hi */
849 /* ori r3,r3,0x0000 / IOP480 register base address lo */
852 /* use r4 as the working variable */
853 /* turn on CS3 (LOCCTL.7) */
854 lwz r4,0x84(r3) /* LOCTL is at offset 0x84 */
855 andi. r4,r4,0xff7f /* make bit 7 = 0 -- CS3 mode */
856 stw r4,0x84(r3) /* LOCTL is at offset 0x84 */
859 #ifdef CONFIG_DASA_SIM
860 /* use r4 as the working variable */
861 /* turn on MA17 (LOCCTL.7) */
862 lwz r4,0x84(r3) /* LOCTL is at offset 0x84 */
863 ori r4,r4,0x80 /* make bit 7 = 1 -- MA17 mode */
864 stw r4,0x84(r3) /* LOCTL is at offset 0x84 */
867 /* turn on MA16..13 (LCS0BRD.12 = 0) */
868 lwz r4,0x100(r3) /* LCS0BRD is at offset 0x100 */
869 andi. r4,r4,0xefff /* make bit 12 = 0 */
870 stw r4,0x100(r3) /* LCS0BRD is at offset 0x100 */
872 /* make sure above stores all comlete before going on */
875 /* last thing, set local init status done bit (DEVINIT.31) */
876 lwz r4,0x80(r3) /* DEVINIT is at offset 0x80 */
877 oris r4,r4,0x8000 /* make bit 31 = 1 */
878 stw r4,0x80(r3) /* DEVINIT is at offset 0x80 */
880 /* clear all pending interrupts and disable all interrupts */
881 li r4,-1 /* set p1 to 0xffffffff */
882 stw r4,0x1b0(r3) /* clear all pending interrupts */
883 stw r4,0x1b8(r3) /* clear all pending interrupts */
884 li r4,0 /* set r4 to 0 */
885 stw r4,0x1b4(r3) /* disable all interrupts */
886 stw r4,0x1bc(r3) /* disable all interrupts */
888 /* make sure above stores all comlete before going on */
891 /* Set-up icache cacheability. */
892 lis r1, CONFIG_SYS_ICACHE_SACR_VALUE@h
893 ori r1, r1, CONFIG_SYS_ICACHE_SACR_VALUE@l
897 /* Set-up dcache cacheability. */
898 lis r1, CONFIG_SYS_DCACHE_SACR_VALUE@h
899 ori r1, r1, CONFIG_SYS_DCACHE_SACR_VALUE@l
902 addis r1,r0,CONFIG_SYS_INIT_RAM_ADDR@h
903 ori r1,r1,CONFIG_SYS_INIT_SP_OFFSET /* set up the stack to SDRAM */
904 li r0, 0 /* Make room for stack frame header and */
905 stwu r0, -4(r1) /* clear final stack frame so that */
906 stwu r0, -4(r1) /* stack backtraces terminate cleanly */
908 GET_GOT /* initialize GOT access */
910 bl board_init_f /* run first part of init code (from Flash) */
912 #endif /* CONFIG_IOP480 */
914 /*****************************************************************************/
915 #if defined(CONFIG_405GP) || defined(CONFIG_405CR) || \
916 defined(CONFIG_405EP) || defined(CONFIG_405EZ) || \
917 defined(CONFIG_405EX) || defined(CONFIG_405)
918 /*----------------------------------------------------------------------- */
919 /* Clear and set up some registers. */
920 /*----------------------------------------------------------------------- */
922 #if !defined(CONFIG_405EX)
926 * On 405EX, completely clearing the SGR leads to PPC hangup
927 * upon PCIe configuration access. The PCIe memory regions
928 * need to be guarded!
935 mtesr r4 /* clear Exception Syndrome Reg */
936 mttcr r4 /* clear Timer Control Reg */
937 mtxer r4 /* clear Fixed-Point Exception Reg */
938 mtevpr r4 /* clear Exception Vector Prefix Reg */
939 addi r4,r0,(0xFFFF-0x10000) /* set r4 to 0xFFFFFFFF (status in the */
940 /* dbsr is cleared by setting bits to 1) */
941 mtdbsr r4 /* clear/reset the dbsr */
943 /* Invalidate the i- and d-caches. */
947 /* Set-up icache cacheability. */
948 lis r4, CONFIG_SYS_ICACHE_SACR_VALUE@h
949 ori r4, r4, CONFIG_SYS_ICACHE_SACR_VALUE@l
953 /* Set-up dcache cacheability. */
954 lis r4, CONFIG_SYS_DCACHE_SACR_VALUE@h
955 ori r4, r4, CONFIG_SYS_DCACHE_SACR_VALUE@l
958 #if !(defined(CONFIG_SYS_EBC_PB0AP) && defined(CONFIG_SYS_EBC_PB0CR))\
959 && !defined (CONFIG_XILINX_405)
960 /*----------------------------------------------------------------------- */
961 /* Tune the speed and size for flash CS0 */
962 /*----------------------------------------------------------------------- */
963 bl ext_bus_cntlr_init
966 #if !(defined(CONFIG_SYS_INIT_DCACHE_CS) || defined(CONFIG_SYS_TEMP_STACK_OCM))
968 * For boards that don't have OCM and can't use the data cache
969 * for their primordial stack, setup stack here directly after the
970 * SDRAM is initialized in ext_bus_cntlr_init.
972 lis r1, CONFIG_SYS_INIT_RAM_ADDR@h
973 ori r1,r1,CONFIG_SYS_INIT_SP_OFFSET /* set up the stack in SDRAM */
975 li r0, 0 /* Make room for stack frame header and */
976 stwu r0, -4(r1) /* clear final stack frame so that */
977 stwu r0, -4(r1) /* stack backtraces terminate cleanly */
979 * Set up a dummy frame to store reset vector as return address.
980 * this causes stack underflow to reset board.
982 stwu r1, -8(r1) /* Save back chain and move SP */
983 lis r0, RESET_VECTOR@h /* Address of reset vector */
984 ori r0, r0, RESET_VECTOR@l
985 stwu r1, -8(r1) /* Save back chain and move SP */
986 stw r0, +12(r1) /* Save return addr (underflow vect) */
987 #endif /* !(CONFIG_SYS_INIT_DCACHE_CS || !CONFIG_SYS_TEM_STACK_OCM) */
989 #if defined(CONFIG_405EP)
990 /*----------------------------------------------------------------------- */
991 /* DMA Status, clear to come up clean */
992 /*----------------------------------------------------------------------- */
993 addis r3,r0, 0xFFFF /* Clear all existing DMA status */
997 bl ppc405ep_init /* do ppc405ep specific init */
998 #endif /* CONFIG_405EP */
1000 #if defined(CONFIG_SYS_OCM_DATA_ADDR) && defined(CONFIG_SYS_OCM_DATA_SIZE)
1001 #if defined(CONFIG_405EZ)
1002 /********************************************************************
1003 * Setup OCM - On Chip Memory - PPC405EZ uses OCM Controller V2
1004 *******************************************************************/
1006 * We can map the OCM on the PLB3, so map it at
1007 * CONFIG_SYS_OCM_DATA_ADDR + 0x8000
1009 lis r3,CONFIG_SYS_OCM_DATA_ADDR@h /* OCM location */
1010 ori r3,r3,CONFIG_SYS_OCM_DATA_ADDR@l
1011 ori r3,r3,0x0270 /* 16K for Bank 1, R/W/Enable */
1012 mtdcr OCM0_PLBCR1,r3 /* Set PLB Access */
1013 ori r3,r3,0x4000 /* Add 0x4000 for bank 2 */
1014 mtdcr OCM0_PLBCR2,r3 /* Set PLB Access */
1017 lis r3,CONFIG_SYS_OCM_DATA_ADDR@h /* OCM location */
1018 ori r3,r3,CONFIG_SYS_OCM_DATA_ADDR@l
1019 ori r3,r3,0x0270 /* 16K for Bank 1, R/W/Enable */
1020 mtdcr OCM0_DSRC1, r3 /* Set Data Side */
1021 mtdcr OCM0_ISRC1, r3 /* Set Instruction Side */
1022 ori r3,r3,0x4000 /* Add 0x4000 for bank 2 */
1023 mtdcr OCM0_DSRC2, r3 /* Set Data Side */
1024 mtdcr OCM0_ISRC2, r3 /* Set Instruction Side */
1025 addis r3,0,0x0800 /* OCM Data Parity Disable - 1 Wait State */
1026 mtdcr OCM0_DISDPC,r3
1029 #else /* CONFIG_405EZ */
1030 /********************************************************************
1031 * Setup OCM - On Chip Memory
1032 *******************************************************************/
1036 mfdcr r3, OCM0_ISCNTL /* get instr-side IRAM config */
1037 mfdcr r4, OCM0_DSCNTL /* get data-side IRAM config */
1038 and r3, r3, r0 /* disable data-side IRAM */
1039 and r4, r4, r0 /* disable data-side IRAM */
1040 mtdcr OCM0_ISCNTL, r3 /* set instr-side IRAM config */
1041 mtdcr OCM0_DSCNTL, r4 /* set data-side IRAM config */
1044 lis r3,CONFIG_SYS_OCM_DATA_ADDR@h /* OCM location */
1045 ori r3,r3,CONFIG_SYS_OCM_DATA_ADDR@l
1046 mtdcr OCM0_DSARC, r3
1047 addis r4, 0, 0xC000 /* OCM data area enabled */
1048 mtdcr OCM0_DSCNTL, r4
1050 #endif /* CONFIG_405EZ */
1053 /*----------------------------------------------------------------------- */
1054 /* Setup temporary stack in DCACHE or OCM if needed for SDRAM SPD. */
1055 /*----------------------------------------------------------------------- */
1056 #ifdef CONFIG_SYS_INIT_DCACHE_CS
1058 mtdcr EBC0_CFGADDR, r4
1059 lis r4, CONFIG_SYS_INIT_DCACHE_PBxAR@h
1060 ori r4, r4, CONFIG_SYS_INIT_DCACHE_PBxAR@l
1061 mtdcr EBC0_CFGDATA, r4
1064 mtdcr EBC0_CFGADDR, r4
1065 lis r4, CONFIG_SYS_INIT_DCACHE_PBxCR@h
1066 ori r4, r4, CONFIG_SYS_INIT_DCACHE_PBxCR@l
1067 mtdcr EBC0_CFGDATA, r4
1070 * Enable the data cache for the 128MB storage access control region
1071 * at CONFIG_SYS_INIT_RAM_ADDR.
1074 oris r4, r4, PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@h
1075 ori r4, r4, PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@l
1079 * Preallocate data cache lines to be used to avoid a subsequent
1080 * cache miss and an ensuing machine check exception when exceptions
1085 lis r3, CONFIG_SYS_INIT_RAM_ADDR@h
1086 ori r3, r3, CONFIG_SYS_INIT_RAM_ADDR@l
1088 lis r4, CONFIG_SYS_INIT_RAM_END@h
1089 ori r4, r4, CONFIG_SYS_INIT_RAM_END@l
1092 * Convert the size, in bytes, to the number of cache lines/blocks
1095 clrlwi. r5, r4, (32 - L1_CACHE_SHIFT)
1096 srwi r5, r4, L1_CACHE_SHIFT
1102 /* Preallocate the computed number of cache blocks. */
1103 ..alloc_dcache_block:
1105 addi r3, r3, L1_CACHE_BYTES
1106 bdnz ..alloc_dcache_block
1110 * Load the initial stack pointer and data area and convert the size,
1111 * in bytes, to the number of words to initialize to a known value.
1113 lis r1, CONFIG_SYS_INIT_RAM_ADDR@h
1114 ori r1, r1, CONFIG_SYS_INIT_SP_OFFSET@l
1116 lis r4, (CONFIG_SYS_INIT_RAM_END >> 2)@h
1117 ori r4, r4, (CONFIG_SYS_INIT_RAM_END >> 2)@l
1120 lis r2, CONFIG_SYS_INIT_RAM_ADDR@h
1121 ori r2, r2, CONFIG_SYS_INIT_RAM_END@l
1123 lis r4, CONFIG_SYS_INIT_RAM_PATTERN@h
1124 ori r4, r4, CONFIG_SYS_INIT_RAM_PATTERN@l
1131 * Make room for stack frame header and clear final stack frame so
1132 * that stack backtraces terminate cleanly.
1138 * Set up a dummy frame to store reset vector as return address.
1139 * this causes stack underflow to reset board.
1141 stwu r1, -8(r1) /* Save back chain and move SP */
1142 addis r0, 0, RESET_VECTOR@h /* Address of reset vector */
1143 ori r0, r0, RESET_VECTOR@l
1144 stwu r1, -8(r1) /* Save back chain and move SP */
1145 stw r0, +12(r1) /* Save return addr (underflow vect) */
1147 #elif defined(CONFIG_SYS_TEMP_STACK_OCM) && \
1148 (defined(CONFIG_SYS_OCM_DATA_ADDR) && defined(CONFIG_SYS_OCM_DATA_SIZE))
1153 /* Set up Stack at top of OCM */
1154 lis r1, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET)@h
1155 ori r1, r1, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET)@l
1157 /* Set up a zeroized stack frame so that backtrace works right */
1163 * Set up a dummy frame to store reset vector as return address.
1164 * this causes stack underflow to reset board.
1166 stwu r1, -8(r1) /* Save back chain and move SP */
1167 lis r0, RESET_VECTOR@h /* Address of reset vector */
1168 ori r0, r0, RESET_VECTOR@l
1169 stwu r1, -8(r1) /* Save back chain and move SP */
1170 stw r0, +12(r1) /* Save return addr (underflow vect) */
1171 #endif /* CONFIG_SYS_INIT_DCACHE_CS */
1173 #ifdef CONFIG_NAND_SPL
1174 bl nand_boot_common /* will not return */
1176 GET_GOT /* initialize GOT access */
1178 bl cpu_init_f /* run low-level CPU init code (from Flash) */
1180 /* NEVER RETURNS! */
1181 bl board_init_f /* run first part of init code (from Flash) */
1182 #endif /* CONFIG_NAND_SPL */
1184 #endif /* CONFIG_405GP || CONFIG_405CR || CONFIG_405 || CONFIG_405EP */
1185 /*----------------------------------------------------------------------- */
1188 #ifndef CONFIG_NAND_SPL
1190 * This code finishes saving the registers to the exception frame
1191 * and jumps to the appropriate handler for the exception.
1192 * Register r21 is pointer into trap frame, r1 has new stack pointer.
1194 .globl transfer_to_handler
1195 transfer_to_handler:
1205 andi. r24,r23,0x3f00 /* get vector offset */
1209 mtspr SPRG2,r22 /* r1 is now kernel sp */
1210 lwz r24,0(r23) /* virtual address of handler */
1211 lwz r23,4(r23) /* where to go when done */
1216 rfi /* jump to handler, enable MMU */
1219 mfmsr r28 /* Disable interrupts */
1223 SYNC /* Some chip revs need this... */
1238 lwz r2,_NIP(r1) /* Restore environment */
1249 mfmsr r28 /* Disable interrupts */
1253 SYNC /* Some chip revs need this... */
1268 lwz r2,_NIP(r1) /* Restore environment */
1280 mfmsr r28 /* Disable interrupts */
1284 SYNC /* Some chip revs need this... */
1299 lwz r2,_NIP(r1) /* Restore environment */
1301 mtspr SPRN_MCSRR0,r2
1302 mtspr SPRN_MCSRR1,r0
1308 #endif /* CONFIG_440 */
1316 /*------------------------------------------------------------------------------- */
1317 /* Function: out16 */
1318 /* Description: Output 16 bits */
1319 /*------------------------------------------------------------------------------- */
1325 /*------------------------------------------------------------------------------- */
1326 /* Function: out16r */
1327 /* Description: Byte reverse and output 16 bits */
1328 /*------------------------------------------------------------------------------- */
1334 /*------------------------------------------------------------------------------- */
1335 /* Function: out32r */
1336 /* Description: Byte reverse and output 32 bits */
1337 /*------------------------------------------------------------------------------- */
1343 /*------------------------------------------------------------------------------- */
1344 /* Function: in16 */
1345 /* Description: Input 16 bits */
1346 /*------------------------------------------------------------------------------- */
1352 /*------------------------------------------------------------------------------- */
1353 /* Function: in16r */
1354 /* Description: Input 16 bits and byte reverse */
1355 /*------------------------------------------------------------------------------- */
1361 /*------------------------------------------------------------------------------- */
1362 /* Function: in32r */
1363 /* Description: Input 32 bits and byte reverse */
1364 /*------------------------------------------------------------------------------- */
1371 * void relocate_code (addr_sp, gd, addr_moni)
1373 * This "function" does not return, instead it continues in RAM
1374 * after relocating the monitor code.
1376 * r3 = Relocated stack pointer
1377 * r4 = Relocated global data pointer
1378 * r5 = Relocated text pointer
1380 .globl relocate_code
1382 #if defined(CONFIG_4xx_DCACHE) || defined(CONFIG_SYS_INIT_DCACHE_CS)
1384 * We need to flush the initial global data (gd_t) before the dcache
1385 * will be invalidated.
1388 /* Save registers */
1393 /* Flush initial global data range */
1395 addi r4, r4, CONFIG_SYS_GBL_DATA_SIZE@l
1396 bl flush_dcache_range
1398 #if defined(CONFIG_SYS_INIT_DCACHE_CS)
1400 * Undo the earlier data cache set-up for the primordial stack and
1401 * data area. First, invalidate the data cache and then disable data
1402 * cacheability for that area. Finally, restore the EBC values, if
1406 /* Invalidate the primordial stack and data area in cache */
1407 lis r3, CONFIG_SYS_INIT_RAM_ADDR@h
1408 ori r3, r3, CONFIG_SYS_INIT_RAM_ADDR@l
1410 lis r4, CONFIG_SYS_INIT_RAM_END@h
1411 ori r4, r4, CONFIG_SYS_INIT_RAM_END@l
1414 bl invalidate_dcache_range
1416 /* Disable cacheability for the region */
1418 lis r4, ~PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@h
1419 ori r4, r4, ~PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@l
1423 /* Restore the EBC parameters */
1425 mtdcr EBC0_CFGADDR, r3
1427 ori r3, r3, PBxAP_VAL@l
1428 mtdcr EBC0_CFGDATA, r3
1431 mtdcr EBC0_CFGADDR, r3
1433 ori r3, r3, PBxCR_VAL@l
1434 mtdcr EBC0_CFGDATA, r3
1435 #endif /* defined(CONFIG_SYS_INIT_DCACHE_CS) */
1437 /* Restore registers */
1441 #endif /* defined(CONFIG_4xx_DCACHE) || defined(CONFIG_SYS_INIT_DCACHE_CS) */
1443 #ifdef CONFIG_SYS_INIT_RAM_DCACHE
1445 * Unlock the previously locked d-cache
1449 /* set TFLOOR/NFLOOR to 0 again */
1466 /* Invalidate data cache, now no longer our stack */
1470 #endif /* CONFIG_SYS_INIT_RAM_DCACHE */
1473 * On some 440er platforms the cache is enabled in the first TLB (Boot-CS)
1474 * to speed up the boot process. Now this cache needs to be disabled.
1476 #if defined(CONFIG_440)
1477 /* Clear all potential pending exceptions */
1480 addi r1,r0,CONFIG_SYS_TLB_FOR_BOOT_FLASH /* Use defined TLB */
1481 tlbre r0,r1,0x0002 /* Read contents */
1482 ori r0,r0,0x0c00 /* Or in the inhibit, write through bit */
1483 tlbwe r0,r1,0x0002 /* Save it out */
1486 #endif /* defined(CONFIG_440) */
1487 mr r1, r3 /* Set new stack pointer */
1488 mr r9, r4 /* Save copy of Init Data pointer */
1489 mr r10, r5 /* Save copy of Destination Address */
1492 mr r3, r5 /* Destination Address */
1493 lis r4, CONFIG_SYS_MONITOR_BASE@h /* Source Address */
1494 ori r4, r4, CONFIG_SYS_MONITOR_BASE@l
1495 lwz r5, GOT(__init_end)
1497 li r6, L1_CACHE_BYTES /* Cache Line Size */
1502 * New GOT-PTR = (old GOT-PTR - CONFIG_SYS_MONITOR_BASE) + Destination Address
1508 /* First our own GOT */
1510 /* then the one used by the C code */
1520 beq cr1,4f /* In place copy is not necessary */
1521 beq 7f /* Protect against 0 count */
1540 * Now flush the cache: note that we must start from a cache aligned
1541 * address. Otherwise we might miss one cache line.
1545 beq 7f /* Always flush prefetch queue in any case */
1553 sync /* Wait for all dcbst to complete on bus */
1559 7: sync /* Wait for all icbi to complete on bus */
1563 * We are done. Do not return, instead branch to second part of board
1564 * initialization, now running from RAM.
1567 addi r0, r10, in_ram - _start + _START_OFFSET
1569 blr /* NEVER RETURNS! */
1574 * Relocation Function, r12 point to got2+0x8000
1576 * Adjust got2 pointers, no need to check for 0, this code
1577 * already puts a few entries in the table.
1579 li r0,__got2_entries@sectoff@l
1580 la r3,GOT(_GOT2_TABLE_)
1581 lwz r11,GOT(_GOT2_TABLE_)
1593 * Now adjust the fixups and the pointers to the fixups
1594 * in case we need to move ourselves again.
1596 li r0,__fixup_entries@sectoff@l
1597 lwz r3,GOT(_FIXUP_TABLE_)
1611 * Now clear BSS segment
1613 lwz r3,GOT(__bss_start)
1636 mr r3, r9 /* Init Data pointer */
1637 mr r4, r10 /* Destination Address */
1641 * Copy exception vector code to low memory
1644 * r7: source address, r8: end address, r9: target address
1648 mflr r4 /* save link register */
1650 lwz r7, GOT(_start_of_vectors)
1651 lwz r8, GOT(_end_of_vectors)
1653 li r9, 0x100 /* reset vector always at 0x100 */
1656 bgelr /* return if r7>=r8 - just in case */
1666 * relocate `hdlr' and `int_return' entries
1668 li r7, .L_MachineCheck - _start + _START_OFFSET
1669 li r8, Alignment - _start + _START_OFFSET
1672 addi r7, r7, 0x100 /* next exception vector */
1676 li r7, .L_Alignment - _start + _START_OFFSET
1679 li r7, .L_ProgramCheck - _start + _START_OFFSET
1683 li r7, .L_FPUnavailable - _start + _START_OFFSET
1686 li r7, .L_Decrementer - _start + _START_OFFSET
1689 li r7, .L_APU - _start + _START_OFFSET
1692 li r7, .L_InstructionTLBError - _start + _START_OFFSET
1695 li r7, .L_DataTLBError - _start + _START_OFFSET
1697 #else /* CONFIG_440 */
1698 li r7, .L_PIT - _start + _START_OFFSET
1701 li r7, .L_InstructionTLBMiss - _start + _START_OFFSET
1704 li r7, .L_DataTLBMiss - _start + _START_OFFSET
1706 #endif /* CONFIG_440 */
1708 li r7, .L_DebugBreakpoint - _start + _START_OFFSET
1711 #if !defined(CONFIG_440)
1712 addi r7,r0,0x1000 /* set ME bit (Machine Exceptions) */
1713 oris r7,r7,0x0002 /* set CE bit (Critical Exceptions) */
1714 mtmsr r7 /* change MSR */
1717 b __440_msr_continue
1720 addi r7,r0,0x1000 /* set ME bit (Machine Exceptions) */
1721 oris r7,r7,0x0002 /* set CE bit (Critical Exceptions) */
1729 mtlr r4 /* restore link register */
1732 #if defined(CONFIG_440)
1733 /*----------------------------------------------------------------------------+
1735 +----------------------------------------------------------------------------*/
1736 function_prolog(dcbz_area)
1737 rlwinm. r5,r4,0,27,31
1738 rlwinm r5,r4,27,5,31
1747 function_epilog(dcbz_area)
1748 #endif /* CONFIG_440 */
1749 #endif /* CONFIG_NAND_SPL */
1751 /*------------------------------------------------------------------------------- */
1753 /* Description: Input 8 bits */
1754 /*------------------------------------------------------------------------------- */
1760 /*------------------------------------------------------------------------------- */
1761 /* Function: out8 */
1762 /* Description: Output 8 bits */
1763 /*------------------------------------------------------------------------------- */
1769 /*------------------------------------------------------------------------------- */
1770 /* Function: out32 */
1771 /* Description: Output 32 bits */
1772 /*------------------------------------------------------------------------------- */
1778 /*------------------------------------------------------------------------------- */
1779 /* Function: in32 */
1780 /* Description: Input 32 bits */
1781 /*------------------------------------------------------------------------------- */
1787 /**************************************************************************/
1788 /* PPC405EP specific stuff */
1789 /**************************************************************************/
1793 #ifdef CONFIG_BUBINGA
1795 * Initialize EBC chip selects 1 & 4 and GPIO pins (for alternate
1796 * function) to support FPGA and NVRAM accesses below.
1799 lis r3,GPIO0_OSRH@h /* config GPIO output select */
1800 ori r3,r3,GPIO0_OSRH@l
1801 lis r4,CONFIG_SYS_GPIO0_OSRH@h
1802 ori r4,r4,CONFIG_SYS_GPIO0_OSRH@l
1805 ori r3,r3,GPIO0_OSRL@l
1806 lis r4,CONFIG_SYS_GPIO0_OSRL@h
1807 ori r4,r4,CONFIG_SYS_GPIO0_OSRL@l
1810 lis r3,GPIO0_ISR1H@h /* config GPIO input select */
1811 ori r3,r3,GPIO0_ISR1H@l
1812 lis r4,CONFIG_SYS_GPIO0_ISR1H@h
1813 ori r4,r4,CONFIG_SYS_GPIO0_ISR1H@l
1815 lis r3,GPIO0_ISR1L@h
1816 ori r3,r3,GPIO0_ISR1L@l
1817 lis r4,CONFIG_SYS_GPIO0_ISR1L@h
1818 ori r4,r4,CONFIG_SYS_GPIO0_ISR1L@l
1821 lis r3,GPIO0_TSRH@h /* config GPIO three-state select */
1822 ori r3,r3,GPIO0_TSRH@l
1823 lis r4,CONFIG_SYS_GPIO0_TSRH@h
1824 ori r4,r4,CONFIG_SYS_GPIO0_TSRH@l
1827 ori r3,r3,GPIO0_TSRL@l
1828 lis r4,CONFIG_SYS_GPIO0_TSRL@h
1829 ori r4,r4,CONFIG_SYS_GPIO0_TSRL@l
1832 lis r3,GPIO0_TCR@h /* config GPIO driver output enables */
1833 ori r3,r3,GPIO0_TCR@l
1834 lis r4,CONFIG_SYS_GPIO0_TCR@h
1835 ori r4,r4,CONFIG_SYS_GPIO0_TCR@l
1838 li r3,PB1AP /* program EBC bank 1 for RTC access */
1839 mtdcr EBC0_CFGADDR,r3
1840 lis r3,CONFIG_SYS_EBC_PB1AP@h
1841 ori r3,r3,CONFIG_SYS_EBC_PB1AP@l
1842 mtdcr EBC0_CFGDATA,r3
1844 mtdcr EBC0_CFGADDR,r3
1845 lis r3,CONFIG_SYS_EBC_PB1CR@h
1846 ori r3,r3,CONFIG_SYS_EBC_PB1CR@l
1847 mtdcr EBC0_CFGDATA,r3
1849 li r3,PB1AP /* program EBC bank 1 for RTC access */
1850 mtdcr EBC0_CFGADDR,r3
1851 lis r3,CONFIG_SYS_EBC_PB1AP@h
1852 ori r3,r3,CONFIG_SYS_EBC_PB1AP@l
1853 mtdcr EBC0_CFGDATA,r3
1855 mtdcr EBC0_CFGADDR,r3
1856 lis r3,CONFIG_SYS_EBC_PB1CR@h
1857 ori r3,r3,CONFIG_SYS_EBC_PB1CR@l
1858 mtdcr EBC0_CFGDATA,r3
1860 li r3,PB4AP /* program EBC bank 4 for FPGA access */
1861 mtdcr EBC0_CFGADDR,r3
1862 lis r3,CONFIG_SYS_EBC_PB4AP@h
1863 ori r3,r3,CONFIG_SYS_EBC_PB4AP@l
1864 mtdcr EBC0_CFGDATA,r3
1866 mtdcr EBC0_CFGADDR,r3
1867 lis r3,CONFIG_SYS_EBC_PB4CR@h
1868 ori r3,r3,CONFIG_SYS_EBC_PB4CR@l
1869 mtdcr EBC0_CFGDATA,r3
1873 !-----------------------------------------------------------------------
1874 ! Check to see if chip is in bypass mode.
1875 ! If so, write stored CPC0_PLLMR0 and CPC0_PLLMR1 values and perform a
1876 ! CPU reset Otherwise, skip this step and keep going.
1877 ! Note: Running BIOS in bypass mode is not supported since PLB speed
1878 ! will not be fast enough for the SDRAM (min 66MHz)
1879 !-----------------------------------------------------------------------
1881 mfdcr r5, CPC0_PLLMR1
1882 rlwinm r4,r5,1,0x1 /* get system clock source (SSCS) */
1885 beq pll_done /* if SSCS =b'1' then PLL has */
1886 /* already been set */
1887 /* and CPU has been reset */
1888 /* so skip to next section */
1890 #ifdef CONFIG_BUBINGA
1892 !-----------------------------------------------------------------------
1893 ! Read NVRAM to get value to write in PLLMR.
1894 ! If value has not been correctly saved, write default value
1895 ! Default config values (assuming on-board 33MHz SYS_CLK) are above.
1896 ! See CPU_DEFAULT_200 and CPU_DEFAULT_266 above.
1898 ! WARNING: This code assumes the first three words in the nvram_t
1899 ! structure in openbios.h. Changing the beginning of
1900 ! the structure will break this code.
1902 !-----------------------------------------------------------------------
1904 addis r3,0,NVRAM_BASE@h
1905 addi r3,r3,NVRAM_BASE@l
1908 addis r5,0,NVRVFY1@h
1909 addi r5,r5,NVRVFY1@l
1910 cmp cr0,0,r4,r5 /* Compare 1st NVRAM Magic number*/
1914 addis r5,0,NVRVFY2@h
1915 addi r5,r5,NVRVFY2@l
1916 cmp cr0,0,r4,r5 /* Compare 2 NVRAM Magic number */
1918 addi r3,r3,8 /* Skip over conf_size */
1919 lwz r4, 4(r3) /* Load PLLMR1 value from NVRAM */
1920 lwz r3, 0(r3) /* Load PLLMR0 value from NVRAM */
1921 rlwinm r5,r4,1,0x1 /* get system clock source (SSCS) */
1922 cmpi cr0,0,r5,1 /* See if PLL is locked */
1925 #endif /* CONFIG_BUBINGA */
1929 andi. r5, r4, CPC0_BOOT_SEP@l
1930 bne strap_1 /* serial eeprom present */
1931 addis r5,0,CPLD_REG0_ADDR@h
1932 ori r5,r5,CPLD_REG0_ADDR@l
1935 #endif /* CONFIG_TAIHU */
1937 #if defined(CONFIG_ZEUS)
1939 andi. r5, r4, CPC0_BOOT_SEP@l
1940 bne strap_1 /* serial eeprom present */
1947 mfdcr r3, CPC0_PLLMR0
1948 mfdcr r4, CPC0_PLLMR1
1952 addis r3,0,PLLMR0_DEFAULT@h /* PLLMR0 default value */
1953 ori r3,r3,PLLMR0_DEFAULT@l /* */
1954 addis r4,0,PLLMR1_DEFAULT@h /* PLLMR1 default value */
1955 ori r4,r4,PLLMR1_DEFAULT@l /* */
1960 addis r3,0,PLLMR0_DEFAULT_PCI66@h
1961 ori r3,r3,PLLMR0_DEFAULT_PCI66@l
1962 addis r4,0,PLLMR1_DEFAULT_PCI66@h
1963 ori r4,r4,PLLMR1_DEFAULT_PCI66@l
1966 mfdcr r3, CPC0_PLLMR0
1967 mfdcr r4, CPC0_PLLMR1
1968 #endif /* CONFIG_TAIHU */
1971 b pll_write /* Write the CPC0_PLLMR with new value */
1975 !-----------------------------------------------------------------------
1976 ! Clear Soft Reset Register
1977 ! This is needed to enable PCI if not booting from serial EPROM
1978 !-----------------------------------------------------------------------
1988 blr /* return to main code */
1991 !-----------------------------------------------------------------------------
1992 ! Function: pll_write
1993 ! Description: Updates the value of the CPC0_PLLMR according to CMOS27E documentation
1995 ! 1. Pll is first disabled (de-activated by putting in bypass mode)
1997 ! 3. Clock dividers are set while PLL is held in reset and bypassed
1998 ! 4. PLL Reset is cleared
1999 ! 5. Wait 100us for PLL to lock
2000 ! 6. A core reset is performed
2001 ! Input: r3 = Value to write to CPC0_PLLMR0
2002 ! Input: r4 = Value to write to CPC0_PLLMR1
2004 !-----------------------------------------------------------------------------
2010 ori r5,r5,0x0101 /* Stop the UART clocks */
2011 mtdcr CPC0_UCR,r5 /* Before changing PLL */
2013 mfdcr r5, CPC0_PLLMR1
2014 rlwinm r5,r5,0,0x7FFFFFFF /* Disable PLL */
2015 mtdcr CPC0_PLLMR1,r5
2016 oris r5,r5,0x4000 /* Set PLL Reset */
2017 mtdcr CPC0_PLLMR1,r5
2019 mtdcr CPC0_PLLMR0,r3 /* Set clock dividers */
2020 rlwinm r5,r4,0,0x3FFFFFFF /* Reset & Bypass new PLL dividers */
2021 oris r5,r5,0x4000 /* Set PLL Reset */
2022 mtdcr CPC0_PLLMR1,r5 /* Set clock dividers */
2023 rlwinm r5,r5,0,0xBFFFFFFF /* Clear PLL Reset */
2024 mtdcr CPC0_PLLMR1,r5
2027 ! Wait min of 100us for PLL to lock.
2028 ! See CMOS 27E databook for more info.
2029 ! At 200MHz, that means waiting 20,000 instructions
2031 addi r3,0,20000 /* 2000 = 0x4e20 */
2036 oris r5,r5,0x8000 /* Enable PLL */
2037 mtdcr CPC0_PLLMR1,r5 /* Engage */
2040 * Reset CPU to guarantee timings are OK
2041 * Not sure if this is needed...
2044 mtspr SPRN_DBCR0,r3 /* This will cause a CPU core reset, and */
2045 /* execution will continue from the poweron */
2046 /* vector of 0xfffffffc */
2047 #endif /* CONFIG_405EP */
2049 #if defined(CONFIG_440)
2050 /*----------------------------------------------------------------------------+
2052 +----------------------------------------------------------------------------*/
2053 function_prolog(mttlb3)
2056 function_epilog(mttlb3)
2058 /*----------------------------------------------------------------------------+
2060 +----------------------------------------------------------------------------*/
2061 function_prolog(mftlb3)
2064 function_epilog(mftlb3)
2066 /*----------------------------------------------------------------------------+
2068 +----------------------------------------------------------------------------*/
2069 function_prolog(mttlb2)
2072 function_epilog(mttlb2)
2074 /*----------------------------------------------------------------------------+
2076 +----------------------------------------------------------------------------*/
2077 function_prolog(mftlb2)
2080 function_epilog(mftlb2)
2082 /*----------------------------------------------------------------------------+
2084 +----------------------------------------------------------------------------*/
2085 function_prolog(mttlb1)
2088 function_epilog(mttlb1)
2090 /*----------------------------------------------------------------------------+
2092 +----------------------------------------------------------------------------*/
2093 function_prolog(mftlb1)
2096 function_epilog(mftlb1)
2097 #endif /* CONFIG_440 */
2099 #if defined(CONFIG_NAND_SPL)
2101 * void nand_boot_relocate(dst, src, bytes)
2103 * r3 = Destination address to copy code to (in SDRAM)
2104 * r4 = Source address to copy code from
2105 * r5 = size to copy in bytes
2113 * Copy SPL from icache into SDRAM
2125 * Calculate "corrected" link register, so that we "continue"
2126 * in execution in destination range
2128 sub r3,r7,r6 /* r3 = src - dst */
2129 sub r8,r8,r3 /* r8 = link-reg - (src - dst) */
2135 * First initialize SDRAM. It has to be available *before* calling
2138 lis r3,CONFIG_SYS_SDRAM_BASE@h
2139 ori r3,r3,CONFIG_SYS_SDRAM_BASE@l
2143 * Now copy the 4k SPL code into SDRAM and continue execution
2146 lis r3,CONFIG_SYS_NAND_BOOT_SPL_DST@h
2147 ori r3,r3,CONFIG_SYS_NAND_BOOT_SPL_DST@l
2148 lis r4,CONFIG_SYS_NAND_BOOT_SPL_SRC@h
2149 ori r4,r4,CONFIG_SYS_NAND_BOOT_SPL_SRC@l
2150 lis r5,CONFIG_SYS_NAND_BOOT_SPL_SIZE@h
2151 ori r5,r5,CONFIG_SYS_NAND_BOOT_SPL_SIZE@l
2152 bl nand_boot_relocate
2155 * We're running from SDRAM now!!!
2157 * It is necessary for 4xx systems to relocate from running at
2158 * the original location (0xfffffxxx) to somewhere else (SDRAM
2159 * preferably). This is because CS0 needs to be reconfigured for
2160 * NAND access. And we can't reconfigure this CS when currently
2161 * "running" from it.
2165 * Finally call nand_boot() to load main NAND U-Boot image from
2166 * NAND and jump to it.
2168 bl nand_boot /* will not return */
2169 #endif /* CONFIG_NAND_SPL */