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 *-------------------------------------------------------------------------------
52 * Startup code for IBM/AMCC PowerPC 4xx (PPC4xx) based boards
54 * The following description only applies to the NOR flash style booting.
55 * NAND booting is different. For more details about NAND booting on 4xx
56 * take a look at doc/README.nand-boot-ppc440.
58 * The CPU starts at address 0xfffffffc (last word in the address space).
59 * The U-Boot image therefore has to be located in the "upper" area of the
60 * flash (e.g. 512MiB - 0xfff80000 ... 0xffffffff). The default value for
61 * the boot chip-select (CS0) is quite big and covers this area. On the
62 * 405EX this is for example 0xffe00000 ... 0xffffffff. U-Boot will
63 * reconfigure this CS0 (and other chip-selects as well when configured
64 * this way) in the boot process to the "correct" values matching the
68 #include <asm-offsets.h>
70 #include <asm/ppc4xx.h>
71 #include <timestamp.h>
74 #define _LINUX_CONFIG_H 1 /* avoid reading Linux autoconf.h file */
76 #include <ppc_asm.tmpl>
79 #include <asm/cache.h>
81 #include <asm/ppc4xx-isram.h>
83 #ifndef CONFIG_IDENT_STRING
84 #define CONFIG_IDENT_STRING ""
87 #ifdef CONFIG_SYS_INIT_DCACHE_CS
88 # if (CONFIG_SYS_INIT_DCACHE_CS == 0)
91 # if (defined(CONFIG_SYS_EBC_PB0AP) && defined(CONFIG_SYS_EBC_PB0CR))
92 # define PBxAP_VAL CONFIG_SYS_EBC_PB0AP
93 # define PBxCR_VAL CONFIG_SYS_EBC_PB0CR
96 # if (CONFIG_SYS_INIT_DCACHE_CS == 1)
99 # if (defined(CONFIG_SYS_EBC_PB1AP) && defined(CONFIG_SYS_EBC_PB1CR))
100 # define PBxAP_VAL CONFIG_SYS_EBC_PB1AP
101 # define PBxCR_VAL CONFIG_SYS_EBC_PB1CR
104 # if (CONFIG_SYS_INIT_DCACHE_CS == 2)
107 # if (defined(CONFIG_SYS_EBC_PB2AP) && defined(CONFIG_SYS_EBC_PB2CR))
108 # define PBxAP_VAL CONFIG_SYS_EBC_PB2AP
109 # define PBxCR_VAL CONFIG_SYS_EBC_PB2CR
112 # if (CONFIG_SYS_INIT_DCACHE_CS == 3)
115 # if (defined(CONFIG_SYS_EBC_PB3AP) && defined(CONFIG_SYS_EBC_PB3CR))
116 # define PBxAP_VAL CONFIG_SYS_EBC_PB3AP
117 # define PBxCR_VAL CONFIG_SYS_EBC_PB3CR
120 # if (CONFIG_SYS_INIT_DCACHE_CS == 4)
123 # if (defined(CONFIG_SYS_EBC_PB4AP) && defined(CONFIG_SYS_EBC_PB4CR))
124 # define PBxAP_VAL CONFIG_SYS_EBC_PB4AP
125 # define PBxCR_VAL CONFIG_SYS_EBC_PB4CR
128 # if (CONFIG_SYS_INIT_DCACHE_CS == 5)
131 # if (defined(CONFIG_SYS_EBC_PB5AP) && defined(CONFIG_SYS_EBC_PB5CR))
132 # define PBxAP_VAL CONFIG_SYS_EBC_PB5AP
133 # define PBxCR_VAL CONFIG_SYS_EBC_PB5CR
136 # if (CONFIG_SYS_INIT_DCACHE_CS == 6)
139 # if (defined(CONFIG_SYS_EBC_PB6AP) && defined(CONFIG_SYS_EBC_PB6CR))
140 # define PBxAP_VAL CONFIG_SYS_EBC_PB6AP
141 # define PBxCR_VAL CONFIG_SYS_EBC_PB6CR
144 # if (CONFIG_SYS_INIT_DCACHE_CS == 7)
147 # if (defined(CONFIG_SYS_EBC_PB7AP) && defined(CONFIG_SYS_EBC_PB7CR))
148 # define PBxAP_VAL CONFIG_SYS_EBC_PB7AP
149 # define PBxCR_VAL CONFIG_SYS_EBC_PB7CR
159 * Memory Bank x (nothingness) initialization CONFIG_SYS_INIT_RAM_ADDR + 64 MiB
160 * used as temporary stack pointer for the primordial stack
162 # ifndef CONFIG_SYS_INIT_DCACHE_PBxAR
163 # define CONFIG_SYS_INIT_DCACHE_PBxAR (EBC_BXAP_BME_DISABLED | \
164 EBC_BXAP_TWT_ENCODE(7) | \
165 EBC_BXAP_BCE_DISABLE | \
166 EBC_BXAP_BCT_2TRANS | \
167 EBC_BXAP_CSN_ENCODE(0) | \
168 EBC_BXAP_OEN_ENCODE(0) | \
169 EBC_BXAP_WBN_ENCODE(0) | \
170 EBC_BXAP_WBF_ENCODE(0) | \
171 EBC_BXAP_TH_ENCODE(2) | \
172 EBC_BXAP_RE_DISABLED | \
173 EBC_BXAP_SOR_NONDELAYED | \
174 EBC_BXAP_BEM_WRITEONLY | \
175 EBC_BXAP_PEN_DISABLED)
176 # endif /* CONFIG_SYS_INIT_DCACHE_PBxAR */
177 # ifndef CONFIG_SYS_INIT_DCACHE_PBxCR
178 # define CONFIG_SYS_INIT_DCACHE_PBxCR (EBC_BXCR_BAS_ENCODE(CONFIG_SYS_INIT_RAM_ADDR) | \
182 # endif /* CONFIG_SYS_INIT_DCACHE_PBxCR */
183 # ifndef CONFIG_SYS_INIT_RAM_PATTERN
184 # define CONFIG_SYS_INIT_RAM_PATTERN 0xDEADDEAD
186 #endif /* CONFIG_SYS_INIT_DCACHE_CS */
188 #if (defined(CONFIG_SYS_INIT_RAM_DCACHE) && (CONFIG_SYS_INIT_RAM_SIZE > (4 << 10)))
189 #error Only 4k of init-ram is supported - please adjust CONFIG_SYS_INIT_RAM_SIZE!
193 * Unless otherwise overriden, enable two 128MB cachable instruction regions
194 * at CONFIG_SYS_SDRAM_BASE and another 128MB cacheable instruction region covering
195 * NOR flash at CONFIG_SYS_FLASH_BASE. Disable all cacheable data regions.
197 #if !defined(CONFIG_SYS_FLASH_BASE)
198 /* If not already defined, set it to the "last" 128MByte region */
199 # define CONFIG_SYS_FLASH_BASE 0xf8000000
201 #if !defined(CONFIG_SYS_ICACHE_SACR_VALUE)
202 # define CONFIG_SYS_ICACHE_SACR_VALUE \
203 (PPC_128MB_SACR_VALUE(CONFIG_SYS_SDRAM_BASE + ( 0 << 20)) | \
204 PPC_128MB_SACR_VALUE(CONFIG_SYS_SDRAM_BASE + (128 << 20)) | \
205 PPC_128MB_SACR_VALUE(CONFIG_SYS_FLASH_BASE))
206 #endif /* !defined(CONFIG_SYS_ICACHE_SACR_VALUE) */
208 #if !defined(CONFIG_SYS_DCACHE_SACR_VALUE)
209 # define CONFIG_SYS_DCACHE_SACR_VALUE \
211 #endif /* !defined(CONFIG_SYS_DCACHE_SACR_VALUE) */
213 #if !defined(CONFIG_SYS_TLB_FOR_BOOT_FLASH)
214 #define CONFIG_SYS_TLB_FOR_BOOT_FLASH 0 /* use TLB 0 as default */
217 #define function_prolog(func_name) .text; \
221 #define function_epilog(func_name) .type func_name,@function; \
222 .size func_name,.-func_name
224 /* We don't want the MMU yet.
227 #define MSR_KERNEL ( MSR_ME ) /* Machine Check */
230 .extern ext_bus_cntlr_init
231 #ifdef CONFIG_NAND_U_BOOT
232 .extern reconfig_tlb0
236 * Set up GOT: Global Offset Table
238 * Use r12 to access the GOT
240 #if !defined(CONFIG_NAND_SPL)
242 GOT_ENTRY(_GOT2_TABLE_)
243 GOT_ENTRY(_FIXUP_TABLE_)
246 GOT_ENTRY(_start_of_vectors)
247 GOT_ENTRY(_end_of_vectors)
248 GOT_ENTRY(transfer_to_handler)
250 GOT_ENTRY(__init_end)
251 GOT_ENTRY(__bss_end__)
252 GOT_ENTRY(__bss_start)
254 #endif /* CONFIG_NAND_SPL */
256 #if defined(CONFIG_NAND_U_BOOT) && !defined(CONFIG_NAND_SPL)
258 * NAND U-Boot image is started from offset 0
261 #if defined(CONFIG_440)
265 bl cpu_init_f /* run low-level CPU init code (from Flash) */
267 /* NOTREACHED - board_init_f() does not return */
270 #if defined(CONFIG_SYS_RAMBOOT) || defined(CONFIG_BOOT_FROM_XMD)
272 * 4xx RAM-booting U-Boot image is started from offset 0
279 * 440 Startup -- on reset only the top 4k of the effective
280 * address space is mapped in by an entry in the instruction
281 * and data shadow TLB. The .bootpg section is located in the
282 * top 4k & does only what's necessary to map in the the rest
283 * of the boot rom. Once the boot rom is mapped in we can
284 * proceed with normal startup.
286 * NOTE: CS0 only covers the top 2MB of the effective address
290 #if defined(CONFIG_440)
291 #if !defined(CONFIG_NAND_SPL)
292 .section .bootpg,"ax"
296 /**************************************************************************/
298 /*--------------------------------------------------------------------+
299 | 440EPX BUP Change - Hardware team request
300 +--------------------------------------------------------------------*/
301 #if defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
306 /*----------------------------------------------------------------+
307 | Core bug fix. Clear the esr
308 +-----------------------------------------------------------------*/
311 /*----------------------------------------------------------------*/
312 /* Clear and set up some registers. */
313 /*----------------------------------------------------------------*/
314 iccci r0,r0 /* NOTE: operands not used for 440 */
315 dccci r0,r0 /* NOTE: operands not used for 440 */
322 /* NOTE: 440GX adds machine check status regs */
323 #if defined(CONFIG_440) && !defined(CONFIG_440GP)
330 /*----------------------------------------------------------------*/
332 /*----------------------------------------------------------------*/
333 /* Disable store gathering & broadcast, guarantee inst/data
334 * cache block touch, force load/store alignment
335 * (see errata 1.12: 440_33)
337 lis r1,0x0030 /* store gathering & broadcast disable */
338 ori r1,r1,0x6000 /* cache touch */
341 /*----------------------------------------------------------------*/
342 /* Initialize debug */
343 /*----------------------------------------------------------------*/
345 andis. r1, r1, 0x8000 /* test DBCR0[EDM] bit */
346 bne skip_debug_init /* if set, don't clear debug register */
348 ori r1,r1,CCR0_DTB@l /* Disable Trace Broadcast */
362 mtspr SPRN_DBSR,r1 /* Clear all valid bits */
365 #if defined (CONFIG_440SPE)
366 /*----------------------------------------------------------------+
367 | Initialize Core Configuration Reg1.
368 | a. ICDPEI: Record even parity. Normal operation.
369 | b. ICTPEI: Record even parity. Normal operation.
370 | c. DCTPEI: Record even parity. Normal operation.
371 | d. DCDPEI: Record even parity. Normal operation.
372 | e. DCUPEI: Record even parity. Normal operation.
373 | f. DCMPEI: Record even parity. Normal operation.
374 | g. FCOM: Normal operation
375 | h. MMUPEI: Record even parity. Normal operation.
376 | i. FFF: Flush only as much data as necessary.
377 | j. TCS: Timebase increments from CPU clock.
378 +-----------------------------------------------------------------*/
382 /*----------------------------------------------------------------+
383 | Reset the timebase.
384 | The previous write to CCR1 sets the timebase source.
385 +-----------------------------------------------------------------*/
390 /*----------------------------------------------------------------*/
391 /* Setup interrupt vectors */
392 /*----------------------------------------------------------------*/
393 mtspr SPRN_IVPR,r0 /* Vectors start at 0x0000_0000 */
395 mtspr SPRN_IVOR0,r1 /* Critical input */
397 mtspr SPRN_IVOR1,r1 /* Machine check */
399 mtspr SPRN_IVOR2,r1 /* Data storage */
401 mtspr SPRN_IVOR3,r1 /* Instruction storage */
403 mtspr SPRN_IVOR4,r1 /* External interrupt */
405 mtspr SPRN_IVOR5,r1 /* Alignment */
407 mtspr SPRN_IVOR6,r1 /* Program check */
409 mtspr SPRN_IVOR7,r1 /* Floating point unavailable */
411 mtspr SPRN_IVOR8,r1 /* System call */
413 mtspr SPRN_IVOR9,r1 /* Auxiliary Processor unavailable */
415 mtspr SPRN_IVOR10,r1 /* Decrementer */
417 mtspr SPRN_IVOR13,r1 /* Data TLB error */
419 mtspr SPRN_IVOR14,r1 /* Instr TLB error */
421 mtspr SPRN_IVOR15,r1 /* Debug */
423 /*----------------------------------------------------------------*/
424 /* Configure cache regions */
425 /*----------------------------------------------------------------*/
443 /*----------------------------------------------------------------*/
444 /* Cache victim limits */
445 /*----------------------------------------------------------------*/
446 /* floors 0, ceiling max to use the entire cache -- nothing locked
453 /*----------------------------------------------------------------+
454 |Initialize MMUCR[STID] = 0.
455 +-----------------------------------------------------------------*/
462 /*----------------------------------------------------------------*/
463 /* Clear all TLB entries -- TID = 0, TS = 0 */
464 /*----------------------------------------------------------------*/
466 #ifdef CONFIG_SYS_RAMBOOT
467 li r4,0 /* Start with TLB #0 */
469 li r4,1 /* Start with TLB #1 */
471 li r1,64 /* 64 TLB entries */
472 sub r1,r1,r4 /* calculate last TLB # */
475 #ifdef CONFIG_SYS_RAMBOOT
476 tlbre r3,r4,0 /* Read contents from TLB word #0 to get EPN */
477 rlwinm. r3,r3,0,0xfffffc00 /* Mask EPN */
478 beq tlbnxt /* Skip EPN=0 TLB, this is the SDRAM TLB */
480 tlbwe r0,r4,0 /* Invalidate all entries (V=0)*/
483 tlbnxt: addi r4,r4,1 /* Next TLB */
486 /*----------------------------------------------------------------*/
487 /* TLB entry setup -- step thru tlbtab */
488 /*----------------------------------------------------------------*/
489 #if defined(CONFIG_440SPE_REVA)
490 /*----------------------------------------------------------------*/
491 /* We have different TLB tables for revA and rev B of 440SPe */
492 /*----------------------------------------------------------------*/
504 bl tlbtab /* Get tlbtab pointer */
507 li r1,0x003f /* 64 TLB entries max */
513 #ifdef CONFIG_SYS_RAMBOOT
514 tlbre r3,r4,0 /* Read contents from TLB word #0 */
515 rlwinm. r3,r3,0,0x00000200 /* Mask V (valid) bit */
516 bne tlbnx2 /* Skip V=1 TLB, this is the SDRAM TLB */
520 beq 2f /* 0 marks end */
523 tlbwe r0,r4,0 /* TLB Word 0 */
524 tlbwe r1,r4,1 /* TLB Word 1 */
525 tlbwe r2,r4,2 /* TLB Word 2 */
526 tlbnx2: addi r4,r4,1 /* Next TLB */
529 /*----------------------------------------------------------------*/
530 /* Continue from 'normal' start */
531 /*----------------------------------------------------------------*/
537 mtspr SPRN_SRR1,r0 /* Keep things disabled for now */
541 #endif /* CONFIG_440 */
544 * r3 - 1st arg to board_init(): IMMP pointer
545 * r4 - 2nd arg to board_init(): boot flag
547 #ifndef CONFIG_NAND_SPL
549 .long 0x27051956 /* U-Boot Magic Number */
550 .globl version_string
552 .ascii U_BOOT_VERSION
553 .ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")"
554 .ascii CONFIG_IDENT_STRING, "\0"
556 . = EXC_OFF_SYS_RESET
557 .globl _start_of_vectors
560 /* Critical input. */
561 CRIT_EXCEPTION(0x100, CritcalInput, UnknownException)
565 MCK_EXCEPTION(0x200, MachineCheck, MachineCheckException)
567 CRIT_EXCEPTION(0x200, MachineCheck, MachineCheckException)
568 #endif /* CONFIG_440 */
570 /* Data Storage exception. */
571 STD_EXCEPTION(0x300, DataStorage, UnknownException)
573 /* Instruction Storage exception. */
574 STD_EXCEPTION(0x400, InstStorage, UnknownException)
576 /* External Interrupt exception. */
577 STD_EXCEPTION(0x500, ExtInterrupt, external_interrupt)
579 /* Alignment exception. */
582 EXCEPTION_PROLOG(SRR0, SRR1)
587 addi r3,r1,STACK_FRAME_OVERHEAD
588 EXC_XFER_TEMPLATE(Alignment, AlignmentException, MSR_KERNEL, COPY_EE)
590 /* Program check exception */
593 EXCEPTION_PROLOG(SRR0, SRR1)
594 addi r3,r1,STACK_FRAME_OVERHEAD
595 EXC_XFER_TEMPLATE(ProgramCheck, ProgramCheckException,
599 STD_EXCEPTION(0x800, FPUnavailable, UnknownException)
600 STD_EXCEPTION(0x900, Decrementer, DecrementerPITException)
601 STD_EXCEPTION(0xa00, APU, UnknownException)
603 STD_EXCEPTION(0xc00, SystemCall, UnknownException)
606 STD_EXCEPTION(0x1300, DataTLBError, UnknownException)
607 STD_EXCEPTION(0x1400, InstructionTLBError, UnknownException)
609 STD_EXCEPTION(0x1000, PIT, DecrementerPITException)
610 STD_EXCEPTION(0x1100, InstructionTLBMiss, UnknownException)
611 STD_EXCEPTION(0x1200, DataTLBMiss, UnknownException)
613 CRIT_EXCEPTION(0x2000, DebugBreakpoint, DebugException )
615 .globl _end_of_vectors
622 /*****************************************************************************/
623 #if defined(CONFIG_440)
625 /*----------------------------------------------------------------*/
626 /* Clear and set up some registers. */
627 /*----------------------------------------------------------------*/
630 mtspr SPRN_DEC,r0 /* prevent dec exceptions */
631 mtspr SPRN_TBWL,r0 /* prevent fit & wdt exceptions */
633 mtspr SPRN_TSR,r1 /* clear all timer exception status */
634 mtspr SPRN_TCR,r0 /* disable all */
635 mtspr SPRN_ESR,r0 /* clear exception syndrome register */
636 mtxer r0 /* clear integer exception register */
638 /*----------------------------------------------------------------*/
639 /* Debug setup -- some (not very good) ice's need an event*/
640 /* to establish control :-( Define CONFIG_SYS_INIT_DBCR to the dbsr */
641 /* value you need in this case 0x8cff 0000 should do the trick */
642 /*----------------------------------------------------------------*/
643 #if defined(CONFIG_SYS_INIT_DBCR)
646 mtspr SPRN_DBSR,r1 /* Clear all status bits */
647 lis r0,CONFIG_SYS_INIT_DBCR@h
648 ori r0,r0,CONFIG_SYS_INIT_DBCR@l
653 /*----------------------------------------------------------------*/
654 /* Setup the internal SRAM */
655 /*----------------------------------------------------------------*/
658 #ifdef CONFIG_SYS_INIT_RAM_DCACHE
659 /* Clear Dcache to use as RAM */
660 addis r3,r0,CONFIG_SYS_INIT_RAM_ADDR@h
661 ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l
662 addis r4,r0,CONFIG_SYS_INIT_RAM_SIZE@h
663 ori r4,r4,CONFIG_SYS_INIT_RAM_SIZE@l
664 rlwinm. r5,r4,0,27,31
676 * Lock the init-ram/stack in d-cache, so that other regions
677 * may use d-cache as well
678 * Note, that this current implementation locks exactly 4k
679 * of d-cache, so please make sure that you don't define a
680 * bigger init-ram area. Take a look at the lwmon5 440EPx
681 * implementation as a reference.
685 /* 8. set TFLOOR/NFLOOR to 8 (-> 8*16*32 bytes locked -> 4k) */
701 #endif /* CONFIG_SYS_INIT_RAM_DCACHE */
703 /* 440EP & 440GR are only 440er PPC's without internal SRAM */
704 #if !defined(CONFIG_440EP) && !defined(CONFIG_440GR)
705 /* not all PPC's have internal SRAM usable as L2-cache */
706 #if defined(CONFIG_440GX) || \
707 defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
708 defined(CONFIG_460SX)
709 mtdcr L2_CACHE_CFG,r0 /* Ensure L2 Cache is off */
710 #elif defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
711 defined(CONFIG_APM821XX)
713 ori r1,r1,0x0008 /* Set L2_CACHE_CFG[RDBW]=1 */
714 mtdcr L2_CACHE_CFG,r1
720 and r1,r1,r2 /* Disable parity check */
723 and r1,r1,r2 /* Disable pwr mgmt */
726 lis r1,0x8000 /* BAS = 8000_0000 */
727 #if defined(CONFIG_440GX) || defined(CONFIG_440SP)
728 ori r1,r1,0x0980 /* first 64k */
729 mtdcr ISRAM0_SB0CR,r1
731 ori r1,r1,0x0980 /* second 64k */
732 mtdcr ISRAM0_SB1CR,r1
734 ori r1,r1, 0x0980 /* third 64k */
735 mtdcr ISRAM0_SB2CR,r1
737 ori r1,r1, 0x0980 /* fourth 64k */
738 mtdcr ISRAM0_SB3CR,r1
739 #elif defined(CONFIG_440SPE) || defined(CONFIG_460EX) || \
740 defined(CONFIG_460GT) || defined(CONFIG_APM821XX)
741 lis r1,0x0000 /* BAS = X_0000_0000 */
742 ori r1,r1,0x0984 /* first 64k */
743 mtdcr ISRAM0_SB0CR,r1
745 ori r1,r1,0x0984 /* second 64k */
746 mtdcr ISRAM0_SB1CR,r1
748 ori r1,r1, 0x0984 /* third 64k */
749 mtdcr ISRAM0_SB2CR,r1
751 ori r1,r1, 0x0984 /* fourth 64k */
752 mtdcr ISRAM0_SB3CR,r1
753 #if defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
754 defined(CONFIG_APM821XX)
758 and r1,r1,r2 /* Disable parity check */
761 and r1,r1,r2 /* Disable pwr mgmt */
764 lis r1,0x0004 /* BAS = 4_0004_0000 */
765 ori r1,r1,ISRAM1_SIZE /* ocm size */
766 mtdcr ISRAM1_SB0CR,r1
768 #elif defined(CONFIG_460SX)
769 lis r1,0x0000 /* BAS = 0000_0000 */
770 ori r1,r1,0x0B84 /* first 128k */
771 mtdcr ISRAM0_SB0CR,r1
773 ori r1,r1,0x0B84 /* second 128k */
774 mtdcr ISRAM0_SB1CR,r1
776 ori r1,r1, 0x0B84 /* third 128k */
777 mtdcr ISRAM0_SB2CR,r1
779 ori r1,r1, 0x0B84 /* fourth 128k */
780 mtdcr ISRAM0_SB3CR,r1
781 #elif defined(CONFIG_440GP)
782 ori r1,r1,0x0380 /* 8k rw */
783 mtdcr ISRAM0_SB0CR,r1
784 mtdcr ISRAM0_SB1CR,r0 /* Disable bank 1 */
786 #endif /* #if !defined(CONFIG_440EP) && !defined(CONFIG_440GR) */
788 /*----------------------------------------------------------------*/
789 /* Setup the stack in internal SRAM */
790 /*----------------------------------------------------------------*/
791 lis r1,CONFIG_SYS_INIT_RAM_ADDR@h
792 ori r1,r1,CONFIG_SYS_INIT_SP_OFFSET@l
795 stwu r0,-4(r1) /* Terminate call chain */
797 stwu r1,-8(r1) /* Save back chain and move SP */
798 lis r0,RESET_VECTOR@h /* Address of reset vector */
799 ori r0,r0, RESET_VECTOR@l
800 stwu r1,-8(r1) /* Save back chain and move SP */
801 stw r0,+12(r1) /* Save return addr (underflow vect) */
803 #ifdef CONFIG_NAND_SPL
804 bl nand_boot_common /* will not return */
808 bl cpu_init_f /* run low-level CPU init code (from Flash) */
810 /* NOTREACHED - board_init_f() does not return */
813 #endif /* CONFIG_440 */
815 /*****************************************************************************/
817 /*----------------------------------------------------------------------- */
818 /* Set up some machine state registers. */
819 /*----------------------------------------------------------------------- */
820 addi r0,r0,0x0000 /* initialize r0 to zero */
821 mtspr SPRN_ESR,r0 /* clear Exception Syndrome Reg */
822 mttcr r0 /* timer control register */
823 mtexier r0 /* disable all interrupts */
824 addis r4,r0,0xFFFF /* set r4 to 0xFFFFFFFF (status in the */
825 ori r4,r4,0xFFFF /* dbsr is cleared by setting bits to 1) */
826 mtdbsr r4 /* clear/reset the dbsr */
827 mtexisr r4 /* clear all pending interrupts */
829 mtexier r4 /* enable critical exceptions */
830 addis r4,r0,0x0000 /* assume 403GCX - enable core clk */
831 ori r4,r4,0x4020 /* dbling (no harm done on GA and GC */
832 mtiocr r4 /* since bit not used) & DRC to latch */
833 /* data bus on rising edge of CAS */
834 /*----------------------------------------------------------------------- */
836 /*----------------------------------------------------------------------- */
838 /*----------------------------------------------------------------------- */
839 /* Invalidate i-cache and d-cache TAG arrays. */
840 /*----------------------------------------------------------------------- */
841 addi r3,0,1024 /* 1/4 of I-cache size, half of D-cache */
842 addi r4,0,1024 /* 1/4 of I-cache */
847 addic. r3,r3,-16 /* move back one cache line */
848 bne ..cloop /* loop back to do rest until r3 = 0 */
851 /* initialize IOP480 so it can read 1 MB code area for SRAM spaces */
852 /* this requires enabling MA[17..0], by default only MA[12..0] are enabled. */
855 /* first copy IOP480 register base address into r3 */
856 addis r3,0,0x5000 /* IOP480 register base address hi */
857 /* ori r3,r3,0x0000 / IOP480 register base address lo */
860 /* use r4 as the working variable */
861 /* turn on CS3 (LOCCTL.7) */
862 lwz r4,0x84(r3) /* LOCTL is at offset 0x84 */
863 andi. r4,r4,0xff7f /* make bit 7 = 0 -- CS3 mode */
864 stw r4,0x84(r3) /* LOCTL is at offset 0x84 */
867 #ifdef CONFIG_DASA_SIM
868 /* use r4 as the working variable */
869 /* turn on MA17 (LOCCTL.7) */
870 lwz r4,0x84(r3) /* LOCTL is at offset 0x84 */
871 ori r4,r4,0x80 /* make bit 7 = 1 -- MA17 mode */
872 stw r4,0x84(r3) /* LOCTL is at offset 0x84 */
875 /* turn on MA16..13 (LCS0BRD.12 = 0) */
876 lwz r4,0x100(r3) /* LCS0BRD is at offset 0x100 */
877 andi. r4,r4,0xefff /* make bit 12 = 0 */
878 stw r4,0x100(r3) /* LCS0BRD is at offset 0x100 */
880 /* make sure above stores all comlete before going on */
883 /* last thing, set local init status done bit (DEVINIT.31) */
884 lwz r4,0x80(r3) /* DEVINIT is at offset 0x80 */
885 oris r4,r4,0x8000 /* make bit 31 = 1 */
886 stw r4,0x80(r3) /* DEVINIT is at offset 0x80 */
888 /* clear all pending interrupts and disable all interrupts */
889 li r4,-1 /* set p1 to 0xffffffff */
890 stw r4,0x1b0(r3) /* clear all pending interrupts */
891 stw r4,0x1b8(r3) /* clear all pending interrupts */
892 li r4,0 /* set r4 to 0 */
893 stw r4,0x1b4(r3) /* disable all interrupts */
894 stw r4,0x1bc(r3) /* disable all interrupts */
896 /* make sure above stores all comlete before going on */
899 /* Set-up icache cacheability. */
900 lis r1, CONFIG_SYS_ICACHE_SACR_VALUE@h
901 ori r1, r1, CONFIG_SYS_ICACHE_SACR_VALUE@l
905 /* Set-up dcache cacheability. */
906 lis r1, CONFIG_SYS_DCACHE_SACR_VALUE@h
907 ori r1, r1, CONFIG_SYS_DCACHE_SACR_VALUE@l
910 addis r1,r0,CONFIG_SYS_INIT_RAM_ADDR@h
911 ori r1,r1,CONFIG_SYS_INIT_SP_OFFSET /* set up the stack to SDRAM */
912 li r0, 0 /* Make room for stack frame header and */
913 stwu r0, -4(r1) /* clear final stack frame so that */
914 stwu r0, -4(r1) /* stack backtraces terminate cleanly */
916 GET_GOT /* initialize GOT access */
918 bl board_init_f /* run first part of init code (from Flash) */
919 /* NOTREACHED - board_init_f() does not return */
921 #endif /* CONFIG_IOP480 */
923 /*****************************************************************************/
924 #if defined(CONFIG_405GP) || defined(CONFIG_405CR) || \
925 defined(CONFIG_405EP) || defined(CONFIG_405EZ) || \
926 defined(CONFIG_405EX) || defined(CONFIG_405)
927 /*----------------------------------------------------------------------- */
928 /* Clear and set up some registers. */
929 /*----------------------------------------------------------------------- */
931 #if !defined(CONFIG_405EX)
935 * On 405EX, completely clearing the SGR leads to PPC hangup
936 * upon PCIe configuration access. The PCIe memory regions
937 * need to be guarded!
944 mtesr r4 /* clear Exception Syndrome Reg */
945 mttcr r4 /* clear Timer Control Reg */
946 mtxer r4 /* clear Fixed-Point Exception Reg */
947 mtevpr r4 /* clear Exception Vector Prefix Reg */
948 addi r4,r0,(0xFFFF-0x10000) /* set r4 to 0xFFFFFFFF (status in the */
949 /* dbsr is cleared by setting bits to 1) */
950 mtdbsr r4 /* clear/reset the dbsr */
952 /* Invalidate the i- and d-caches. */
956 /* Set-up icache cacheability. */
957 lis r4, CONFIG_SYS_ICACHE_SACR_VALUE@h
958 ori r4, r4, CONFIG_SYS_ICACHE_SACR_VALUE@l
962 /* Set-up dcache cacheability. */
963 lis r4, CONFIG_SYS_DCACHE_SACR_VALUE@h
964 ori r4, r4, CONFIG_SYS_DCACHE_SACR_VALUE@l
967 #if !(defined(CONFIG_SYS_EBC_PB0AP) && defined(CONFIG_SYS_EBC_PB0CR))\
968 && !defined (CONFIG_XILINX_405)
969 /*----------------------------------------------------------------------- */
970 /* Tune the speed and size for flash CS0 */
971 /*----------------------------------------------------------------------- */
972 bl ext_bus_cntlr_init
975 #if !(defined(CONFIG_SYS_INIT_DCACHE_CS) || defined(CONFIG_SYS_TEMP_STACK_OCM))
977 * For boards that don't have OCM and can't use the data cache
978 * for their primordial stack, setup stack here directly after the
979 * SDRAM is initialized in ext_bus_cntlr_init.
981 lis r1, CONFIG_SYS_INIT_RAM_ADDR@h
982 ori r1,r1,CONFIG_SYS_INIT_SP_OFFSET /* set up the stack in SDRAM */
984 li r0, 0 /* Make room for stack frame header and */
985 stwu r0, -4(r1) /* clear final stack frame so that */
986 stwu r0, -4(r1) /* stack backtraces terminate cleanly */
988 * Set up a dummy frame to store reset vector as return address.
989 * this causes stack underflow to reset board.
991 stwu r1, -8(r1) /* Save back chain and move SP */
992 lis r0, RESET_VECTOR@h /* Address of reset vector */
993 ori r0, r0, RESET_VECTOR@l
994 stwu r1, -8(r1) /* Save back chain and move SP */
995 stw r0, +12(r1) /* Save return addr (underflow vect) */
996 #endif /* !(CONFIG_SYS_INIT_DCACHE_CS || !CONFIG_SYS_TEM_STACK_OCM) */
998 #if defined(CONFIG_405EP)
999 /*----------------------------------------------------------------------- */
1000 /* DMA Status, clear to come up clean */
1001 /*----------------------------------------------------------------------- */
1002 addis r3,r0, 0xFFFF /* Clear all existing DMA status */
1006 bl ppc405ep_init /* do ppc405ep specific init */
1007 #endif /* CONFIG_405EP */
1009 #if defined(CONFIG_SYS_OCM_DATA_ADDR) && defined(CONFIG_SYS_OCM_DATA_SIZE)
1010 #if defined(CONFIG_405EZ)
1011 /********************************************************************
1012 * Setup OCM - On Chip Memory - PPC405EZ uses OCM Controller V2
1013 *******************************************************************/
1015 * We can map the OCM on the PLB3, so map it at
1016 * CONFIG_SYS_OCM_DATA_ADDR + 0x8000
1018 lis r3,CONFIG_SYS_OCM_DATA_ADDR@h /* OCM location */
1019 ori r3,r3,CONFIG_SYS_OCM_DATA_ADDR@l
1020 ori r3,r3,0x0270 /* 16K for Bank 1, R/W/Enable */
1021 mtdcr OCM0_PLBCR1,r3 /* Set PLB Access */
1022 ori r3,r3,0x4000 /* Add 0x4000 for bank 2 */
1023 mtdcr OCM0_PLBCR2,r3 /* Set PLB Access */
1026 lis r3,CONFIG_SYS_OCM_DATA_ADDR@h /* OCM location */
1027 ori r3,r3,CONFIG_SYS_OCM_DATA_ADDR@l
1028 ori r3,r3,0x0270 /* 16K for Bank 1, R/W/Enable */
1029 mtdcr OCM0_DSRC1, r3 /* Set Data Side */
1030 mtdcr OCM0_ISRC1, r3 /* Set Instruction Side */
1031 ori r3,r3,0x4000 /* Add 0x4000 for bank 2 */
1032 mtdcr OCM0_DSRC2, r3 /* Set Data Side */
1033 mtdcr OCM0_ISRC2, r3 /* Set Instruction Side */
1034 addis r3,0,0x0800 /* OCM Data Parity Disable - 1 Wait State */
1035 mtdcr OCM0_DISDPC,r3
1038 #else /* CONFIG_405EZ */
1039 /********************************************************************
1040 * Setup OCM - On Chip Memory
1041 *******************************************************************/
1045 mfdcr r3, OCM0_ISCNTL /* get instr-side IRAM config */
1046 mfdcr r4, OCM0_DSCNTL /* get data-side IRAM config */
1047 and r3, r3, r0 /* disable data-side IRAM */
1048 and r4, r4, r0 /* disable data-side IRAM */
1049 mtdcr OCM0_ISCNTL, r3 /* set instr-side IRAM config */
1050 mtdcr OCM0_DSCNTL, r4 /* set data-side IRAM config */
1053 lis r3,CONFIG_SYS_OCM_DATA_ADDR@h /* OCM location */
1054 ori r3,r3,CONFIG_SYS_OCM_DATA_ADDR@l
1055 mtdcr OCM0_DSARC, r3
1056 addis r4, 0, 0xC000 /* OCM data area enabled */
1057 mtdcr OCM0_DSCNTL, r4
1059 #endif /* CONFIG_405EZ */
1062 /*----------------------------------------------------------------------- */
1063 /* Setup temporary stack in DCACHE or OCM if needed for SDRAM SPD. */
1064 /*----------------------------------------------------------------------- */
1065 #ifdef CONFIG_SYS_INIT_DCACHE_CS
1067 mtdcr EBC0_CFGADDR, r4
1068 lis r4, CONFIG_SYS_INIT_DCACHE_PBxAR@h
1069 ori r4, r4, CONFIG_SYS_INIT_DCACHE_PBxAR@l
1070 mtdcr EBC0_CFGDATA, r4
1073 mtdcr EBC0_CFGADDR, r4
1074 lis r4, CONFIG_SYS_INIT_DCACHE_PBxCR@h
1075 ori r4, r4, CONFIG_SYS_INIT_DCACHE_PBxCR@l
1076 mtdcr EBC0_CFGDATA, r4
1079 * Enable the data cache for the 128MB storage access control region
1080 * at CONFIG_SYS_INIT_RAM_ADDR.
1083 oris r4, r4, PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@h
1084 ori r4, r4, PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@l
1088 * Preallocate data cache lines to be used to avoid a subsequent
1089 * cache miss and an ensuing machine check exception when exceptions
1094 lis r3, CONFIG_SYS_INIT_RAM_ADDR@h
1095 ori r3, r3, CONFIG_SYS_INIT_RAM_ADDR@l
1097 lis r4, CONFIG_SYS_INIT_RAM_SIZE@h
1098 ori r4, r4, CONFIG_SYS_INIT_RAM_SIZE@l
1101 * Convert the size, in bytes, to the number of cache lines/blocks
1104 clrlwi. r5, r4, (32 - L1_CACHE_SHIFT)
1105 srwi r5, r4, L1_CACHE_SHIFT
1111 /* Preallocate the computed number of cache blocks. */
1112 ..alloc_dcache_block:
1114 addi r3, r3, L1_CACHE_BYTES
1115 bdnz ..alloc_dcache_block
1119 * Load the initial stack pointer and data area and convert the size,
1120 * in bytes, to the number of words to initialize to a known value.
1122 lis r1, CONFIG_SYS_INIT_RAM_ADDR@h
1123 ori r1, r1, CONFIG_SYS_INIT_SP_OFFSET@l
1125 lis r4, (CONFIG_SYS_INIT_RAM_SIZE >> 2)@h
1126 ori r4, r4, (CONFIG_SYS_INIT_RAM_SIZE >> 2)@l
1129 lis r2, CONFIG_SYS_INIT_RAM_ADDR@h
1130 ori r2, r2, CONFIG_SYS_INIT_RAM_SIZE@l
1132 lis r4, CONFIG_SYS_INIT_RAM_PATTERN@h
1133 ori r4, r4, CONFIG_SYS_INIT_RAM_PATTERN@l
1140 * Make room for stack frame header and clear final stack frame so
1141 * that stack backtraces terminate cleanly.
1147 * Set up a dummy frame to store reset vector as return address.
1148 * this causes stack underflow to reset board.
1150 stwu r1, -8(r1) /* Save back chain and move SP */
1151 addis r0, 0, RESET_VECTOR@h /* Address of reset vector */
1152 ori r0, r0, RESET_VECTOR@l
1153 stwu r1, -8(r1) /* Save back chain and move SP */
1154 stw r0, +12(r1) /* Save return addr (underflow vect) */
1156 #elif defined(CONFIG_SYS_TEMP_STACK_OCM) && \
1157 (defined(CONFIG_SYS_OCM_DATA_ADDR) && defined(CONFIG_SYS_OCM_DATA_SIZE))
1162 /* Set up Stack at top of OCM */
1163 lis r1, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET)@h
1164 ori r1, r1, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET)@l
1166 /* Set up a zeroized stack frame so that backtrace works right */
1172 * Set up a dummy frame to store reset vector as return address.
1173 * this causes stack underflow to reset board.
1175 stwu r1, -8(r1) /* Save back chain and move SP */
1176 lis r0, RESET_VECTOR@h /* Address of reset vector */
1177 ori r0, r0, RESET_VECTOR@l
1178 stwu r1, -8(r1) /* Save back chain and move SP */
1179 stw r0, +12(r1) /* Save return addr (underflow vect) */
1180 #endif /* CONFIG_SYS_INIT_DCACHE_CS */
1182 #ifdef CONFIG_NAND_SPL
1183 bl nand_boot_common /* will not return */
1185 GET_GOT /* initialize GOT access */
1187 bl cpu_init_f /* run low-level CPU init code (from Flash) */
1189 bl board_init_f /* run first part of init code (from Flash) */
1190 /* NOTREACHED - board_init_f() does not return */
1192 #endif /* CONFIG_NAND_SPL */
1194 #endif /* CONFIG_405GP || CONFIG_405CR || CONFIG_405 || CONFIG_405EP */
1195 /*----------------------------------------------------------------------- */
1198 #ifndef CONFIG_NAND_SPL
1200 * This code finishes saving the registers to the exception frame
1201 * and jumps to the appropriate handler for the exception.
1202 * Register r21 is pointer into trap frame, r1 has new stack pointer.
1204 .globl transfer_to_handler
1205 transfer_to_handler:
1215 andi. r24,r23,0x3f00 /* get vector offset */
1219 mtspr SPRG2,r22 /* r1 is now kernel sp */
1220 lwz r24,0(r23) /* virtual address of handler */
1221 lwz r23,4(r23) /* where to go when done */
1226 rfi /* jump to handler, enable MMU */
1229 mfmsr r28 /* Disable interrupts */
1233 SYNC /* Some chip revs need this... */
1248 lwz r2,_NIP(r1) /* Restore environment */
1259 mfmsr r28 /* Disable interrupts */
1263 SYNC /* Some chip revs need this... */
1278 lwz r2,_NIP(r1) /* Restore environment */
1290 mfmsr r28 /* Disable interrupts */
1294 SYNC /* Some chip revs need this... */
1309 lwz r2,_NIP(r1) /* Restore environment */
1311 mtspr SPRN_MCSRR0,r2
1312 mtspr SPRN_MCSRR1,r0
1318 #endif /* CONFIG_440 */
1326 /*------------------------------------------------------------------------------- */
1327 /* Function: out16 */
1328 /* Description: Output 16 bits */
1329 /*------------------------------------------------------------------------------- */
1335 /*------------------------------------------------------------------------------- */
1336 /* Function: out16r */
1337 /* Description: Byte reverse and output 16 bits */
1338 /*------------------------------------------------------------------------------- */
1344 /*------------------------------------------------------------------------------- */
1345 /* Function: out32r */
1346 /* Description: Byte reverse and output 32 bits */
1347 /*------------------------------------------------------------------------------- */
1353 /*------------------------------------------------------------------------------- */
1354 /* Function: in16 */
1355 /* Description: Input 16 bits */
1356 /*------------------------------------------------------------------------------- */
1362 /*------------------------------------------------------------------------------- */
1363 /* Function: in16r */
1364 /* Description: Input 16 bits and byte reverse */
1365 /*------------------------------------------------------------------------------- */
1371 /*------------------------------------------------------------------------------- */
1372 /* Function: in32r */
1373 /* Description: Input 32 bits and byte reverse */
1374 /*------------------------------------------------------------------------------- */
1381 * void relocate_code (addr_sp, gd, addr_moni)
1383 * This "function" does not return, instead it continues in RAM
1384 * after relocating the monitor code.
1386 * r3 = Relocated stack pointer
1387 * r4 = Relocated global data pointer
1388 * r5 = Relocated text pointer
1390 .globl relocate_code
1392 #if defined(CONFIG_4xx_DCACHE) || defined(CONFIG_SYS_INIT_DCACHE_CS)
1394 * We need to flush the initial global data (gd_t) and bd_info
1395 * before the dcache will be invalidated.
1398 /* Save registers */
1404 * Flush complete dcache, this is faster than flushing the
1405 * ranges for global_data and bd_info instead.
1409 #if defined(CONFIG_SYS_INIT_DCACHE_CS)
1411 * Undo the earlier data cache set-up for the primordial stack and
1412 * data area. First, invalidate the data cache and then disable data
1413 * cacheability for that area. Finally, restore the EBC values, if
1417 /* Invalidate the primordial stack and data area in cache */
1418 lis r3, CONFIG_SYS_INIT_RAM_ADDR@h
1419 ori r3, r3, CONFIG_SYS_INIT_RAM_ADDR@l
1421 lis r4, CONFIG_SYS_INIT_RAM_SIZE@h
1422 ori r4, r4, CONFIG_SYS_INIT_RAM_SIZE@l
1425 bl invalidate_dcache_range
1427 /* Disable cacheability for the region */
1429 lis r4, ~PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@h
1430 ori r4, r4, ~PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@l
1434 /* Restore the EBC parameters */
1436 mtdcr EBC0_CFGADDR, r3
1438 ori r3, r3, PBxAP_VAL@l
1439 mtdcr EBC0_CFGDATA, r3
1442 mtdcr EBC0_CFGADDR, r3
1444 ori r3, r3, PBxCR_VAL@l
1445 mtdcr EBC0_CFGDATA, r3
1446 #endif /* defined(CONFIG_SYS_INIT_DCACHE_CS) */
1448 /* Restore registers */
1452 #endif /* defined(CONFIG_4xx_DCACHE) || defined(CONFIG_SYS_INIT_DCACHE_CS) */
1454 #ifdef CONFIG_SYS_INIT_RAM_DCACHE
1456 * Unlock the previously locked d-cache
1460 /* set TFLOOR/NFLOOR to 0 again */
1477 /* Invalidate data cache, now no longer our stack */
1481 #endif /* CONFIG_SYS_INIT_RAM_DCACHE */
1484 * On some 440er platforms the cache is enabled in the first TLB (Boot-CS)
1485 * to speed up the boot process. Now this cache needs to be disabled.
1487 #if defined(CONFIG_440)
1488 /* Clear all potential pending exceptions */
1491 addi r1,r0,CONFIG_SYS_TLB_FOR_BOOT_FLASH /* Use defined TLB */
1492 tlbre r0,r1,0x0002 /* Read contents */
1493 ori r0,r0,0x0c00 /* Or in the inhibit, write through bit */
1494 tlbwe r0,r1,0x0002 /* Save it out */
1497 #endif /* defined(CONFIG_440) */
1498 mr r1, r3 /* Set new stack pointer */
1499 mr r9, r4 /* Save copy of Init Data pointer */
1500 mr r10, r5 /* Save copy of Destination Address */
1503 mr r3, r5 /* Destination Address */
1504 lis r4, CONFIG_SYS_MONITOR_BASE@h /* Source Address */
1505 ori r4, r4, CONFIG_SYS_MONITOR_BASE@l
1506 lwz r5, GOT(__init_end)
1508 li r6, L1_CACHE_BYTES /* Cache Line Size */
1513 * New GOT-PTR = (old GOT-PTR - CONFIG_SYS_MONITOR_BASE) + Destination Address
1519 /* First our own GOT */
1521 /* then the one used by the C code */
1531 beq cr1,4f /* In place copy is not necessary */
1532 beq 7f /* Protect against 0 count */
1551 * Now flush the cache: note that we must start from a cache aligned
1552 * address. Otherwise we might miss one cache line.
1556 beq 7f /* Always flush prefetch queue in any case */
1564 sync /* Wait for all dcbst to complete on bus */
1570 7: sync /* Wait for all icbi to complete on bus */
1574 * We are done. Do not return, instead branch to second part of board
1575 * initialization, now running from RAM.
1578 addi r0, r10, in_ram - _start + _START_OFFSET
1580 blr /* NEVER RETURNS! */
1585 * Relocation Function, r12 point to got2+0x8000
1587 * Adjust got2 pointers, no need to check for 0, this code
1588 * already puts a few entries in the table.
1590 li r0,__got2_entries@sectoff@l
1591 la r3,GOT(_GOT2_TABLE_)
1592 lwz r11,GOT(_GOT2_TABLE_)
1604 * Now adjust the fixups and the pointers to the fixups
1605 * in case we need to move ourselves again.
1607 li r0,__fixup_entries@sectoff@l
1608 lwz r3,GOT(_FIXUP_TABLE_)
1624 * Now clear BSS segment
1626 lwz r3,GOT(__bss_start)
1627 lwz r4,GOT(__bss_end__)
1649 mr r3, r9 /* Init Data pointer */
1650 mr r4, r10 /* Destination Address */
1654 * Copy exception vector code to low memory
1657 * r7: source address, r8: end address, r9: target address
1661 mflr r4 /* save link register */
1663 lwz r7, GOT(_start_of_vectors)
1664 lwz r8, GOT(_end_of_vectors)
1666 li r9, 0x100 /* reset vector always at 0x100 */
1669 bgelr /* return if r7>=r8 - just in case */
1679 * relocate `hdlr' and `int_return' entries
1681 li r7, .L_MachineCheck - _start + _START_OFFSET
1682 li r8, Alignment - _start + _START_OFFSET
1685 addi r7, r7, 0x100 /* next exception vector */
1689 li r7, .L_Alignment - _start + _START_OFFSET
1692 li r7, .L_ProgramCheck - _start + _START_OFFSET
1696 li r7, .L_FPUnavailable - _start + _START_OFFSET
1699 li r7, .L_Decrementer - _start + _START_OFFSET
1702 li r7, .L_APU - _start + _START_OFFSET
1705 li r7, .L_InstructionTLBError - _start + _START_OFFSET
1708 li r7, .L_DataTLBError - _start + _START_OFFSET
1710 #else /* CONFIG_440 */
1711 li r7, .L_PIT - _start + _START_OFFSET
1714 li r7, .L_InstructionTLBMiss - _start + _START_OFFSET
1717 li r7, .L_DataTLBMiss - _start + _START_OFFSET
1719 #endif /* CONFIG_440 */
1721 li r7, .L_DebugBreakpoint - _start + _START_OFFSET
1724 #if !defined(CONFIG_440)
1725 addi r7,r0,0x1000 /* set ME bit (Machine Exceptions) */
1726 oris r7,r7,0x0002 /* set CE bit (Critical Exceptions) */
1727 mtmsr r7 /* change MSR */
1730 b __440_msr_continue
1733 addi r7,r0,0x1000 /* set ME bit (Machine Exceptions) */
1734 oris r7,r7,0x0002 /* set CE bit (Critical Exceptions) */
1742 mtlr r4 /* restore link register */
1745 #if defined(CONFIG_440)
1746 /*----------------------------------------------------------------------------+
1748 +----------------------------------------------------------------------------*/
1749 function_prolog(dcbz_area)
1750 rlwinm. r5,r4,0,27,31
1751 rlwinm r5,r4,27,5,31
1760 function_epilog(dcbz_area)
1761 #endif /* CONFIG_440 */
1762 #endif /* CONFIG_NAND_SPL */
1764 /*------------------------------------------------------------------------------- */
1766 /* Description: Input 8 bits */
1767 /*------------------------------------------------------------------------------- */
1773 /*------------------------------------------------------------------------------- */
1774 /* Function: out8 */
1775 /* Description: Output 8 bits */
1776 /*------------------------------------------------------------------------------- */
1782 /*------------------------------------------------------------------------------- */
1783 /* Function: out32 */
1784 /* Description: Output 32 bits */
1785 /*------------------------------------------------------------------------------- */
1791 /*------------------------------------------------------------------------------- */
1792 /* Function: in32 */
1793 /* Description: Input 32 bits */
1794 /*------------------------------------------------------------------------------- */
1800 /**************************************************************************/
1801 /* PPC405EP specific stuff */
1802 /**************************************************************************/
1806 #ifdef CONFIG_BUBINGA
1808 * Initialize EBC chip selects 1 & 4 and GPIO pins (for alternate
1809 * function) to support FPGA and NVRAM accesses below.
1812 lis r3,GPIO0_OSRH@h /* config GPIO output select */
1813 ori r3,r3,GPIO0_OSRH@l
1814 lis r4,CONFIG_SYS_GPIO0_OSRH@h
1815 ori r4,r4,CONFIG_SYS_GPIO0_OSRH@l
1818 ori r3,r3,GPIO0_OSRL@l
1819 lis r4,CONFIG_SYS_GPIO0_OSRL@h
1820 ori r4,r4,CONFIG_SYS_GPIO0_OSRL@l
1823 lis r3,GPIO0_ISR1H@h /* config GPIO input select */
1824 ori r3,r3,GPIO0_ISR1H@l
1825 lis r4,CONFIG_SYS_GPIO0_ISR1H@h
1826 ori r4,r4,CONFIG_SYS_GPIO0_ISR1H@l
1828 lis r3,GPIO0_ISR1L@h
1829 ori r3,r3,GPIO0_ISR1L@l
1830 lis r4,CONFIG_SYS_GPIO0_ISR1L@h
1831 ori r4,r4,CONFIG_SYS_GPIO0_ISR1L@l
1834 lis r3,GPIO0_TSRH@h /* config GPIO three-state select */
1835 ori r3,r3,GPIO0_TSRH@l
1836 lis r4,CONFIG_SYS_GPIO0_TSRH@h
1837 ori r4,r4,CONFIG_SYS_GPIO0_TSRH@l
1840 ori r3,r3,GPIO0_TSRL@l
1841 lis r4,CONFIG_SYS_GPIO0_TSRL@h
1842 ori r4,r4,CONFIG_SYS_GPIO0_TSRL@l
1845 lis r3,GPIO0_TCR@h /* config GPIO driver output enables */
1846 ori r3,r3,GPIO0_TCR@l
1847 lis r4,CONFIG_SYS_GPIO0_TCR@h
1848 ori r4,r4,CONFIG_SYS_GPIO0_TCR@l
1851 li r3,PB1AP /* program EBC bank 1 for RTC access */
1852 mtdcr EBC0_CFGADDR,r3
1853 lis r3,CONFIG_SYS_EBC_PB1AP@h
1854 ori r3,r3,CONFIG_SYS_EBC_PB1AP@l
1855 mtdcr EBC0_CFGDATA,r3
1857 mtdcr EBC0_CFGADDR,r3
1858 lis r3,CONFIG_SYS_EBC_PB1CR@h
1859 ori r3,r3,CONFIG_SYS_EBC_PB1CR@l
1860 mtdcr EBC0_CFGDATA,r3
1862 li r3,PB1AP /* program EBC bank 1 for RTC access */
1863 mtdcr EBC0_CFGADDR,r3
1864 lis r3,CONFIG_SYS_EBC_PB1AP@h
1865 ori r3,r3,CONFIG_SYS_EBC_PB1AP@l
1866 mtdcr EBC0_CFGDATA,r3
1868 mtdcr EBC0_CFGADDR,r3
1869 lis r3,CONFIG_SYS_EBC_PB1CR@h
1870 ori r3,r3,CONFIG_SYS_EBC_PB1CR@l
1871 mtdcr EBC0_CFGDATA,r3
1873 li r3,PB4AP /* program EBC bank 4 for FPGA access */
1874 mtdcr EBC0_CFGADDR,r3
1875 lis r3,CONFIG_SYS_EBC_PB4AP@h
1876 ori r3,r3,CONFIG_SYS_EBC_PB4AP@l
1877 mtdcr EBC0_CFGDATA,r3
1879 mtdcr EBC0_CFGADDR,r3
1880 lis r3,CONFIG_SYS_EBC_PB4CR@h
1881 ori r3,r3,CONFIG_SYS_EBC_PB4CR@l
1882 mtdcr EBC0_CFGDATA,r3
1886 !-----------------------------------------------------------------------
1887 ! Check to see if chip is in bypass mode.
1888 ! If so, write stored CPC0_PLLMR0 and CPC0_PLLMR1 values and perform a
1889 ! CPU reset Otherwise, skip this step and keep going.
1890 ! Note: Running BIOS in bypass mode is not supported since PLB speed
1891 ! will not be fast enough for the SDRAM (min 66MHz)
1892 !-----------------------------------------------------------------------
1894 mfdcr r5, CPC0_PLLMR1
1895 rlwinm r4,r5,1,0x1 /* get system clock source (SSCS) */
1898 beq pll_done /* if SSCS =b'1' then PLL has */
1899 /* already been set */
1900 /* and CPU has been reset */
1901 /* so skip to next section */
1903 #ifdef CONFIG_BUBINGA
1905 !-----------------------------------------------------------------------
1906 ! Read NVRAM to get value to write in PLLMR.
1907 ! If value has not been correctly saved, write default value
1908 ! Default config values (assuming on-board 33MHz SYS_CLK) are above.
1909 ! See CPU_DEFAULT_200 and CPU_DEFAULT_266 above.
1911 ! WARNING: This code assumes the first three words in the nvram_t
1912 ! structure in openbios.h. Changing the beginning of
1913 ! the structure will break this code.
1915 !-----------------------------------------------------------------------
1917 addis r3,0,NVRAM_BASE@h
1918 addi r3,r3,NVRAM_BASE@l
1921 addis r5,0,NVRVFY1@h
1922 addi r5,r5,NVRVFY1@l
1923 cmp cr0,0,r4,r5 /* Compare 1st NVRAM Magic number*/
1927 addis r5,0,NVRVFY2@h
1928 addi r5,r5,NVRVFY2@l
1929 cmp cr0,0,r4,r5 /* Compare 2 NVRAM Magic number */
1931 addi r3,r3,8 /* Skip over conf_size */
1932 lwz r4, 4(r3) /* Load PLLMR1 value from NVRAM */
1933 lwz r3, 0(r3) /* Load PLLMR0 value from NVRAM */
1934 rlwinm r5,r4,1,0x1 /* get system clock source (SSCS) */
1935 cmpi cr0,0,r5,1 /* See if PLL is locked */
1938 #endif /* CONFIG_BUBINGA */
1942 andi. r5, r4, CPC0_BOOT_SEP@l
1943 bne strap_1 /* serial eeprom present */
1944 addis r5,0,CPLD_REG0_ADDR@h
1945 ori r5,r5,CPLD_REG0_ADDR@l
1948 #endif /* CONFIG_TAIHU */
1950 #if defined(CONFIG_ZEUS)
1952 andi. r5, r4, CPC0_BOOT_SEP@l
1953 bne strap_1 /* serial eeprom present */
1960 mfdcr r3, CPC0_PLLMR0
1961 mfdcr r4, CPC0_PLLMR1
1965 addis r3,0,PLLMR0_DEFAULT@h /* PLLMR0 default value */
1966 ori r3,r3,PLLMR0_DEFAULT@l /* */
1967 addis r4,0,PLLMR1_DEFAULT@h /* PLLMR1 default value */
1968 ori r4,r4,PLLMR1_DEFAULT@l /* */
1973 addis r3,0,PLLMR0_DEFAULT_PCI66@h
1974 ori r3,r3,PLLMR0_DEFAULT_PCI66@l
1975 addis r4,0,PLLMR1_DEFAULT_PCI66@h
1976 ori r4,r4,PLLMR1_DEFAULT_PCI66@l
1979 mfdcr r3, CPC0_PLLMR0
1980 mfdcr r4, CPC0_PLLMR1
1981 #endif /* CONFIG_TAIHU */
1984 b pll_write /* Write the CPC0_PLLMR with new value */
1988 !-----------------------------------------------------------------------
1989 ! Clear Soft Reset Register
1990 ! This is needed to enable PCI if not booting from serial EPROM
1991 !-----------------------------------------------------------------------
2001 blr /* return to main code */
2004 !-----------------------------------------------------------------------------
2005 ! Function: pll_write
2006 ! Description: Updates the value of the CPC0_PLLMR according to CMOS27E documentation
2008 ! 1. Pll is first disabled (de-activated by putting in bypass mode)
2010 ! 3. Clock dividers are set while PLL is held in reset and bypassed
2011 ! 4. PLL Reset is cleared
2012 ! 5. Wait 100us for PLL to lock
2013 ! 6. A core reset is performed
2014 ! Input: r3 = Value to write to CPC0_PLLMR0
2015 ! Input: r4 = Value to write to CPC0_PLLMR1
2017 !-----------------------------------------------------------------------------
2023 ori r5,r5,0x0101 /* Stop the UART clocks */
2024 mtdcr CPC0_UCR,r5 /* Before changing PLL */
2026 mfdcr r5, CPC0_PLLMR1
2027 rlwinm r5,r5,0,0x7FFFFFFF /* Disable PLL */
2028 mtdcr CPC0_PLLMR1,r5
2029 oris r5,r5,0x4000 /* Set PLL Reset */
2030 mtdcr CPC0_PLLMR1,r5
2032 mtdcr CPC0_PLLMR0,r3 /* Set clock dividers */
2033 rlwinm r5,r4,0,0x3FFFFFFF /* Reset & Bypass new PLL dividers */
2034 oris r5,r5,0x4000 /* Set PLL Reset */
2035 mtdcr CPC0_PLLMR1,r5 /* Set clock dividers */
2036 rlwinm r5,r5,0,0xBFFFFFFF /* Clear PLL Reset */
2037 mtdcr CPC0_PLLMR1,r5
2040 ! Wait min of 100us for PLL to lock.
2041 ! See CMOS 27E databook for more info.
2042 ! At 200MHz, that means waiting 20,000 instructions
2044 addi r3,0,20000 /* 2000 = 0x4e20 */
2049 oris r5,r5,0x8000 /* Enable PLL */
2050 mtdcr CPC0_PLLMR1,r5 /* Engage */
2053 * Reset CPU to guarantee timings are OK
2054 * Not sure if this is needed...
2057 mtspr SPRN_DBCR0,r3 /* This will cause a CPU core reset, and */
2058 /* execution will continue from the poweron */
2059 /* vector of 0xfffffffc */
2060 #endif /* CONFIG_405EP */
2062 #if defined(CONFIG_440)
2063 /*----------------------------------------------------------------------------+
2065 +----------------------------------------------------------------------------*/
2066 function_prolog(mttlb3)
2069 function_epilog(mttlb3)
2071 /*----------------------------------------------------------------------------+
2073 +----------------------------------------------------------------------------*/
2074 function_prolog(mftlb3)
2077 function_epilog(mftlb3)
2079 /*----------------------------------------------------------------------------+
2081 +----------------------------------------------------------------------------*/
2082 function_prolog(mttlb2)
2085 function_epilog(mttlb2)
2087 /*----------------------------------------------------------------------------+
2089 +----------------------------------------------------------------------------*/
2090 function_prolog(mftlb2)
2093 function_epilog(mftlb2)
2095 /*----------------------------------------------------------------------------+
2097 +----------------------------------------------------------------------------*/
2098 function_prolog(mttlb1)
2101 function_epilog(mttlb1)
2103 /*----------------------------------------------------------------------------+
2105 +----------------------------------------------------------------------------*/
2106 function_prolog(mftlb1)
2109 function_epilog(mftlb1)
2110 #endif /* CONFIG_440 */
2112 #if defined(CONFIG_NAND_SPL)
2114 * void nand_boot_relocate(dst, src, bytes)
2116 * r3 = Destination address to copy code to (in SDRAM)
2117 * r4 = Source address to copy code from
2118 * r5 = size to copy in bytes
2126 * Copy SPL from icache into SDRAM
2138 * Calculate "corrected" link register, so that we "continue"
2139 * in execution in destination range
2141 sub r3,r7,r6 /* r3 = src - dst */
2142 sub r8,r8,r3 /* r8 = link-reg - (src - dst) */
2148 * First initialize SDRAM. It has to be available *before* calling
2151 lis r3,CONFIG_SYS_SDRAM_BASE@h
2152 ori r3,r3,CONFIG_SYS_SDRAM_BASE@l
2156 * Now copy the 4k SPL code into SDRAM and continue execution
2159 lis r3,CONFIG_SYS_NAND_BOOT_SPL_DST@h
2160 ori r3,r3,CONFIG_SYS_NAND_BOOT_SPL_DST@l
2161 lis r4,CONFIG_SYS_NAND_BOOT_SPL_SRC@h
2162 ori r4,r4,CONFIG_SYS_NAND_BOOT_SPL_SRC@l
2163 lis r5,CONFIG_SYS_NAND_BOOT_SPL_SIZE@h
2164 ori r5,r5,CONFIG_SYS_NAND_BOOT_SPL_SIZE@l
2165 bl nand_boot_relocate
2168 * We're running from SDRAM now!!!
2170 * It is necessary for 4xx systems to relocate from running at
2171 * the original location (0xfffffxxx) to somewhere else (SDRAM
2172 * preferably). This is because CS0 needs to be reconfigured for
2173 * NAND access. And we can't reconfigure this CS when currently
2174 * "running" from it.
2178 * Finally call nand_boot() to load main NAND U-Boot image from
2179 * NAND and jump to it.
2181 bl nand_boot /* will not return */
2182 #endif /* CONFIG_NAND_SPL */