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>
73 #define _LINUX_CONFIG_H 1 /* avoid reading Linux autoconf.h file */
75 #include <ppc_asm.tmpl>
78 #include <asm/cache.h>
80 #include <asm/ppc4xx-isram.h>
82 #ifdef CONFIG_SYS_INIT_DCACHE_CS
83 # if (CONFIG_SYS_INIT_DCACHE_CS == 0)
86 # if (defined(CONFIG_SYS_EBC_PB0AP) && defined(CONFIG_SYS_EBC_PB0CR))
87 # define PBxAP_VAL CONFIG_SYS_EBC_PB0AP
88 # define PBxCR_VAL CONFIG_SYS_EBC_PB0CR
91 # if (CONFIG_SYS_INIT_DCACHE_CS == 1)
94 # if (defined(CONFIG_SYS_EBC_PB1AP) && defined(CONFIG_SYS_EBC_PB1CR))
95 # define PBxAP_VAL CONFIG_SYS_EBC_PB1AP
96 # define PBxCR_VAL CONFIG_SYS_EBC_PB1CR
99 # if (CONFIG_SYS_INIT_DCACHE_CS == 2)
102 # if (defined(CONFIG_SYS_EBC_PB2AP) && defined(CONFIG_SYS_EBC_PB2CR))
103 # define PBxAP_VAL CONFIG_SYS_EBC_PB2AP
104 # define PBxCR_VAL CONFIG_SYS_EBC_PB2CR
107 # if (CONFIG_SYS_INIT_DCACHE_CS == 3)
110 # if (defined(CONFIG_SYS_EBC_PB3AP) && defined(CONFIG_SYS_EBC_PB3CR))
111 # define PBxAP_VAL CONFIG_SYS_EBC_PB3AP
112 # define PBxCR_VAL CONFIG_SYS_EBC_PB3CR
115 # if (CONFIG_SYS_INIT_DCACHE_CS == 4)
118 # if (defined(CONFIG_SYS_EBC_PB4AP) && defined(CONFIG_SYS_EBC_PB4CR))
119 # define PBxAP_VAL CONFIG_SYS_EBC_PB4AP
120 # define PBxCR_VAL CONFIG_SYS_EBC_PB4CR
123 # if (CONFIG_SYS_INIT_DCACHE_CS == 5)
126 # if (defined(CONFIG_SYS_EBC_PB5AP) && defined(CONFIG_SYS_EBC_PB5CR))
127 # define PBxAP_VAL CONFIG_SYS_EBC_PB5AP
128 # define PBxCR_VAL CONFIG_SYS_EBC_PB5CR
131 # if (CONFIG_SYS_INIT_DCACHE_CS == 6)
134 # if (defined(CONFIG_SYS_EBC_PB6AP) && defined(CONFIG_SYS_EBC_PB6CR))
135 # define PBxAP_VAL CONFIG_SYS_EBC_PB6AP
136 # define PBxCR_VAL CONFIG_SYS_EBC_PB6CR
139 # if (CONFIG_SYS_INIT_DCACHE_CS == 7)
142 # if (defined(CONFIG_SYS_EBC_PB7AP) && defined(CONFIG_SYS_EBC_PB7CR))
143 # define PBxAP_VAL CONFIG_SYS_EBC_PB7AP
144 # define PBxCR_VAL CONFIG_SYS_EBC_PB7CR
154 * Memory Bank x (nothingness) initialization CONFIG_SYS_INIT_RAM_ADDR + 64 MiB
155 * used as temporary stack pointer for the primordial stack
157 # ifndef CONFIG_SYS_INIT_DCACHE_PBxAR
158 # define CONFIG_SYS_INIT_DCACHE_PBxAR (EBC_BXAP_BME_DISABLED | \
159 EBC_BXAP_TWT_ENCODE(7) | \
160 EBC_BXAP_BCE_DISABLE | \
161 EBC_BXAP_BCT_2TRANS | \
162 EBC_BXAP_CSN_ENCODE(0) | \
163 EBC_BXAP_OEN_ENCODE(0) | \
164 EBC_BXAP_WBN_ENCODE(0) | \
165 EBC_BXAP_WBF_ENCODE(0) | \
166 EBC_BXAP_TH_ENCODE(2) | \
167 EBC_BXAP_RE_DISABLED | \
168 EBC_BXAP_SOR_NONDELAYED | \
169 EBC_BXAP_BEM_WRITEONLY | \
170 EBC_BXAP_PEN_DISABLED)
171 # endif /* CONFIG_SYS_INIT_DCACHE_PBxAR */
172 # ifndef CONFIG_SYS_INIT_DCACHE_PBxCR
173 # define CONFIG_SYS_INIT_DCACHE_PBxCR (EBC_BXCR_BAS_ENCODE(CONFIG_SYS_INIT_RAM_ADDR) | \
177 # endif /* CONFIG_SYS_INIT_DCACHE_PBxCR */
178 # ifndef CONFIG_SYS_INIT_RAM_PATTERN
179 # define CONFIG_SYS_INIT_RAM_PATTERN 0xDEADDEAD
181 #endif /* CONFIG_SYS_INIT_DCACHE_CS */
183 #if (defined(CONFIG_SYS_INIT_RAM_DCACHE) && (CONFIG_SYS_INIT_RAM_SIZE > (4 << 10)))
184 #error Only 4k of init-ram is supported - please adjust CONFIG_SYS_INIT_RAM_SIZE!
188 * Unless otherwise overriden, enable two 128MB cachable instruction regions
189 * at CONFIG_SYS_SDRAM_BASE and another 128MB cacheable instruction region covering
190 * NOR flash at CONFIG_SYS_FLASH_BASE. Disable all cacheable data regions.
192 #if !defined(CONFIG_SYS_FLASH_BASE)
193 /* If not already defined, set it to the "last" 128MByte region */
194 # define CONFIG_SYS_FLASH_BASE 0xf8000000
196 #if !defined(CONFIG_SYS_ICACHE_SACR_VALUE)
197 # define CONFIG_SYS_ICACHE_SACR_VALUE \
198 (PPC_128MB_SACR_VALUE(CONFIG_SYS_SDRAM_BASE + ( 0 << 20)) | \
199 PPC_128MB_SACR_VALUE(CONFIG_SYS_SDRAM_BASE + (128 << 20)) | \
200 PPC_128MB_SACR_VALUE(CONFIG_SYS_FLASH_BASE))
201 #endif /* !defined(CONFIG_SYS_ICACHE_SACR_VALUE) */
203 #if !defined(CONFIG_SYS_DCACHE_SACR_VALUE)
204 # define CONFIG_SYS_DCACHE_SACR_VALUE \
206 #endif /* !defined(CONFIG_SYS_DCACHE_SACR_VALUE) */
208 #if !defined(CONFIG_SYS_TLB_FOR_BOOT_FLASH)
209 #define CONFIG_SYS_TLB_FOR_BOOT_FLASH 0 /* use TLB 0 as default */
212 #define function_prolog(func_name) .text; \
216 #define function_epilog(func_name) .type func_name,@function; \
217 .size func_name,.-func_name
219 /* We don't want the MMU yet.
222 #define MSR_KERNEL ( MSR_ME ) /* Machine Check */
225 .extern ext_bus_cntlr_init
226 #ifdef CONFIG_NAND_U_BOOT
227 .extern reconfig_tlb0
231 * Set up GOT: Global Offset Table
233 * Use r12 to access the GOT
235 #if !defined(CONFIG_NAND_SPL)
237 GOT_ENTRY(_GOT2_TABLE_)
238 GOT_ENTRY(_FIXUP_TABLE_)
241 GOT_ENTRY(_start_of_vectors)
242 GOT_ENTRY(_end_of_vectors)
243 GOT_ENTRY(transfer_to_handler)
245 GOT_ENTRY(__init_end)
246 GOT_ENTRY(__bss_end__)
247 GOT_ENTRY(__bss_start)
249 #endif /* CONFIG_NAND_SPL */
251 #if defined(CONFIG_NAND_U_BOOT) && !defined(CONFIG_NAND_SPL)
253 * NAND U-Boot image is started from offset 0
256 #if defined(CONFIG_440)
260 bl cpu_init_f /* run low-level CPU init code (from Flash) */
262 /* NOTREACHED - board_init_f() does not return */
265 #if defined(CONFIG_SYS_RAMBOOT) || defined(CONFIG_BOOT_FROM_XMD)
267 * 4xx RAM-booting U-Boot image is started from offset 0
274 * 440 Startup -- on reset only the top 4k of the effective
275 * address space is mapped in by an entry in the instruction
276 * and data shadow TLB. The .bootpg section is located in the
277 * top 4k & does only what's necessary to map in the the rest
278 * of the boot rom. Once the boot rom is mapped in we can
279 * proceed with normal startup.
281 * NOTE: CS0 only covers the top 2MB of the effective address
285 #if defined(CONFIG_440)
286 #if !defined(CONFIG_NAND_SPL)
287 .section .bootpg,"ax"
291 /**************************************************************************/
293 /*--------------------------------------------------------------------+
294 | 440EPX BUP Change - Hardware team request
295 +--------------------------------------------------------------------*/
296 #if defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
301 /*----------------------------------------------------------------+
302 | Core bug fix. Clear the esr
303 +-----------------------------------------------------------------*/
306 /*----------------------------------------------------------------*/
307 /* Clear and set up some registers. */
308 /*----------------------------------------------------------------*/
309 iccci r0,r0 /* NOTE: operands not used for 440 */
310 dccci r0,r0 /* NOTE: operands not used for 440 */
317 /* NOTE: 440GX adds machine check status regs */
318 #if defined(CONFIG_440) && !defined(CONFIG_440GP)
325 /*----------------------------------------------------------------*/
327 /*----------------------------------------------------------------*/
328 /* Disable store gathering & broadcast, guarantee inst/data
329 * cache block touch, force load/store alignment
330 * (see errata 1.12: 440_33)
332 lis r1,0x0030 /* store gathering & broadcast disable */
333 ori r1,r1,0x6000 /* cache touch */
336 /*----------------------------------------------------------------*/
337 /* Initialize debug */
338 /*----------------------------------------------------------------*/
340 andis. r1, r1, 0x8000 /* test DBCR0[EDM] bit */
341 bne skip_debug_init /* if set, don't clear debug register */
343 ori r1,r1,CCR0_DTB@l /* Disable Trace Broadcast */
357 mtspr SPRN_DBSR,r1 /* Clear all valid bits */
360 #if defined (CONFIG_440SPE)
361 /*----------------------------------------------------------------+
362 | Initialize Core Configuration Reg1.
363 | a. ICDPEI: Record even parity. Normal operation.
364 | b. ICTPEI: Record even parity. Normal operation.
365 | c. DCTPEI: Record even parity. Normal operation.
366 | d. DCDPEI: Record even parity. Normal operation.
367 | e. DCUPEI: Record even parity. Normal operation.
368 | f. DCMPEI: Record even parity. Normal operation.
369 | g. FCOM: Normal operation
370 | h. MMUPEI: Record even parity. Normal operation.
371 | i. FFF: Flush only as much data as necessary.
372 | j. TCS: Timebase increments from CPU clock.
373 +-----------------------------------------------------------------*/
377 /*----------------------------------------------------------------+
378 | Reset the timebase.
379 | The previous write to CCR1 sets the timebase source.
380 +-----------------------------------------------------------------*/
385 /*----------------------------------------------------------------*/
386 /* Setup interrupt vectors */
387 /*----------------------------------------------------------------*/
388 mtspr SPRN_IVPR,r0 /* Vectors start at 0x0000_0000 */
390 mtspr SPRN_IVOR0,r1 /* Critical input */
392 mtspr SPRN_IVOR1,r1 /* Machine check */
394 mtspr SPRN_IVOR2,r1 /* Data storage */
396 mtspr SPRN_IVOR3,r1 /* Instruction storage */
398 mtspr SPRN_IVOR4,r1 /* External interrupt */
400 mtspr SPRN_IVOR5,r1 /* Alignment */
402 mtspr SPRN_IVOR6,r1 /* Program check */
404 mtspr SPRN_IVOR7,r1 /* Floating point unavailable */
406 mtspr SPRN_IVOR8,r1 /* System call */
408 mtspr SPRN_IVOR9,r1 /* Auxiliary Processor unavailable */
410 mtspr SPRN_IVOR10,r1 /* Decrementer */
412 mtspr SPRN_IVOR13,r1 /* Data TLB error */
414 mtspr SPRN_IVOR14,r1 /* Instr TLB error */
416 mtspr SPRN_IVOR15,r1 /* Debug */
418 /*----------------------------------------------------------------*/
419 /* Configure cache regions */
420 /*----------------------------------------------------------------*/
438 /*----------------------------------------------------------------*/
439 /* Cache victim limits */
440 /*----------------------------------------------------------------*/
441 /* floors 0, ceiling max to use the entire cache -- nothing locked
448 /*----------------------------------------------------------------+
449 |Initialize MMUCR[STID] = 0.
450 +-----------------------------------------------------------------*/
457 /*----------------------------------------------------------------*/
458 /* Clear all TLB entries -- TID = 0, TS = 0 */
459 /*----------------------------------------------------------------*/
461 #ifdef CONFIG_SYS_RAMBOOT
462 li r4,0 /* Start with TLB #0 */
464 li r4,1 /* Start with TLB #1 */
466 li r1,64 /* 64 TLB entries */
467 sub r1,r1,r4 /* calculate last TLB # */
470 #ifdef CONFIG_SYS_RAMBOOT
471 tlbre r3,r4,0 /* Read contents from TLB word #0 to get EPN */
472 rlwinm. r3,r3,0,0xfffffc00 /* Mask EPN */
473 beq tlbnxt /* Skip EPN=0 TLB, this is the SDRAM TLB */
475 tlbwe r0,r4,0 /* Invalidate all entries (V=0)*/
478 tlbnxt: addi r4,r4,1 /* Next TLB */
481 /*----------------------------------------------------------------*/
482 /* TLB entry setup -- step thru tlbtab */
483 /*----------------------------------------------------------------*/
484 #if defined(CONFIG_440SPE_REVA)
485 /*----------------------------------------------------------------*/
486 /* We have different TLB tables for revA and rev B of 440SPe */
487 /*----------------------------------------------------------------*/
499 bl tlbtab /* Get tlbtab pointer */
502 li r1,0x003f /* 64 TLB entries max */
508 #ifdef CONFIG_SYS_RAMBOOT
509 tlbre r3,r4,0 /* Read contents from TLB word #0 */
510 rlwinm. r3,r3,0,0x00000200 /* Mask V (valid) bit */
511 bne tlbnx2 /* Skip V=1 TLB, this is the SDRAM TLB */
515 beq 2f /* 0 marks end */
518 tlbwe r0,r4,0 /* TLB Word 0 */
519 tlbwe r1,r4,1 /* TLB Word 1 */
520 tlbwe r2,r4,2 /* TLB Word 2 */
521 tlbnx2: addi r4,r4,1 /* Next TLB */
524 /*----------------------------------------------------------------*/
525 /* Continue from 'normal' start */
526 /*----------------------------------------------------------------*/
532 mtspr SPRN_SRR1,r0 /* Keep things disabled for now */
536 #endif /* CONFIG_440 */
539 * r3 - 1st arg to board_init(): IMMP pointer
540 * r4 - 2nd arg to board_init(): boot flag
542 #ifndef CONFIG_NAND_SPL
544 .long 0x27051956 /* U-Boot Magic Number */
545 .globl version_string
547 .ascii U_BOOT_VERSION_STRING, "\0"
549 . = EXC_OFF_SYS_RESET
550 .globl _start_of_vectors
553 /* Critical input. */
554 CRIT_EXCEPTION(0x100, CritcalInput, UnknownException)
558 MCK_EXCEPTION(0x200, MachineCheck, MachineCheckException)
560 CRIT_EXCEPTION(0x200, MachineCheck, MachineCheckException)
561 #endif /* CONFIG_440 */
563 /* Data Storage exception. */
564 STD_EXCEPTION(0x300, DataStorage, UnknownException)
566 /* Instruction Storage exception. */
567 STD_EXCEPTION(0x400, InstStorage, UnknownException)
569 /* External Interrupt exception. */
570 STD_EXCEPTION(0x500, ExtInterrupt, external_interrupt)
572 /* Alignment exception. */
575 EXCEPTION_PROLOG(SRR0, SRR1)
580 addi r3,r1,STACK_FRAME_OVERHEAD
581 EXC_XFER_TEMPLATE(Alignment, AlignmentException, MSR_KERNEL, COPY_EE)
583 /* Program check exception */
586 EXCEPTION_PROLOG(SRR0, SRR1)
587 addi r3,r1,STACK_FRAME_OVERHEAD
588 EXC_XFER_TEMPLATE(ProgramCheck, ProgramCheckException,
592 STD_EXCEPTION(0x800, FPUnavailable, UnknownException)
593 STD_EXCEPTION(0x900, Decrementer, DecrementerPITException)
594 STD_EXCEPTION(0xa00, APU, UnknownException)
596 STD_EXCEPTION(0xc00, SystemCall, UnknownException)
599 STD_EXCEPTION(0x1300, DataTLBError, UnknownException)
600 STD_EXCEPTION(0x1400, InstructionTLBError, UnknownException)
602 STD_EXCEPTION(0x1000, PIT, DecrementerPITException)
603 STD_EXCEPTION(0x1100, InstructionTLBMiss, UnknownException)
604 STD_EXCEPTION(0x1200, DataTLBMiss, UnknownException)
606 CRIT_EXCEPTION(0x2000, DebugBreakpoint, DebugException )
608 .globl _end_of_vectors
615 /*****************************************************************************/
616 #if defined(CONFIG_440)
618 /*----------------------------------------------------------------*/
619 /* Clear and set up some registers. */
620 /*----------------------------------------------------------------*/
623 mtspr SPRN_DEC,r0 /* prevent dec exceptions */
624 mtspr SPRN_TBWL,r0 /* prevent fit & wdt exceptions */
626 mtspr SPRN_TSR,r1 /* clear all timer exception status */
627 mtspr SPRN_TCR,r0 /* disable all */
628 mtspr SPRN_ESR,r0 /* clear exception syndrome register */
629 mtxer r0 /* clear integer exception register */
631 /*----------------------------------------------------------------*/
632 /* Debug setup -- some (not very good) ice's need an event*/
633 /* to establish control :-( Define CONFIG_SYS_INIT_DBCR to the dbsr */
634 /* value you need in this case 0x8cff 0000 should do the trick */
635 /*----------------------------------------------------------------*/
636 #if defined(CONFIG_SYS_INIT_DBCR)
639 mtspr SPRN_DBSR,r1 /* Clear all status bits */
640 lis r0,CONFIG_SYS_INIT_DBCR@h
641 ori r0,r0,CONFIG_SYS_INIT_DBCR@l
646 /*----------------------------------------------------------------*/
647 /* Setup the internal SRAM */
648 /*----------------------------------------------------------------*/
651 #ifdef CONFIG_SYS_INIT_RAM_DCACHE
652 /* Clear Dcache to use as RAM */
653 addis r3,r0,CONFIG_SYS_INIT_RAM_ADDR@h
654 ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l
655 addis r4,r0,CONFIG_SYS_INIT_RAM_SIZE@h
656 ori r4,r4,CONFIG_SYS_INIT_RAM_SIZE@l
657 rlwinm. r5,r4,0,27,31
669 * Lock the init-ram/stack in d-cache, so that other regions
670 * may use d-cache as well
671 * Note, that this current implementation locks exactly 4k
672 * of d-cache, so please make sure that you don't define a
673 * bigger init-ram area. Take a look at the lwmon5 440EPx
674 * implementation as a reference.
678 /* 8. set TFLOOR/NFLOOR to 8 (-> 8*16*32 bytes locked -> 4k) */
694 #endif /* CONFIG_SYS_INIT_RAM_DCACHE */
696 /* 440EP & 440GR are only 440er PPC's without internal SRAM */
697 #if !defined(CONFIG_440EP) && !defined(CONFIG_440GR)
698 /* not all PPC's have internal SRAM usable as L2-cache */
699 #if defined(CONFIG_440GX) || \
700 defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
701 defined(CONFIG_460SX)
702 mtdcr L2_CACHE_CFG,r0 /* Ensure L2 Cache is off */
703 #elif defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
704 defined(CONFIG_APM821XX)
706 ori r1,r1,0x0008 /* Set L2_CACHE_CFG[RDBW]=1 */
707 mtdcr L2_CACHE_CFG,r1
713 and r1,r1,r2 /* Disable parity check */
716 and r1,r1,r2 /* Disable pwr mgmt */
719 lis r1,0x8000 /* BAS = 8000_0000 */
720 #if defined(CONFIG_440GX) || defined(CONFIG_440SP)
721 ori r1,r1,0x0980 /* first 64k */
722 mtdcr ISRAM0_SB0CR,r1
724 ori r1,r1,0x0980 /* second 64k */
725 mtdcr ISRAM0_SB1CR,r1
727 ori r1,r1, 0x0980 /* third 64k */
728 mtdcr ISRAM0_SB2CR,r1
730 ori r1,r1, 0x0980 /* fourth 64k */
731 mtdcr ISRAM0_SB3CR,r1
732 #elif defined(CONFIG_440SPE) || defined(CONFIG_460EX) || \
733 defined(CONFIG_460GT) || defined(CONFIG_APM821XX)
734 lis r1,0x0000 /* BAS = X_0000_0000 */
735 ori r1,r1,0x0984 /* first 64k */
736 mtdcr ISRAM0_SB0CR,r1
738 ori r1,r1,0x0984 /* second 64k */
739 mtdcr ISRAM0_SB1CR,r1
741 ori r1,r1, 0x0984 /* third 64k */
742 mtdcr ISRAM0_SB2CR,r1
744 ori r1,r1, 0x0984 /* fourth 64k */
745 mtdcr ISRAM0_SB3CR,r1
746 #if defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
747 defined(CONFIG_APM821XX)
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,ISRAM1_SIZE /* ocm size */
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) */
803 /* NOTREACHED - board_init_f() does not return */
806 #endif /* CONFIG_440 */
808 /*****************************************************************************/
809 #if defined(CONFIG_405GP) || defined(CONFIG_405CR) || \
810 defined(CONFIG_405EP) || defined(CONFIG_405EZ) || \
811 defined(CONFIG_405EX) || defined(CONFIG_405)
812 /*----------------------------------------------------------------------- */
813 /* Clear and set up some registers. */
814 /*----------------------------------------------------------------------- */
816 #if !defined(CONFIG_405EX)
820 * On 405EX, completely clearing the SGR leads to PPC hangup
821 * upon PCIe configuration access. The PCIe memory regions
822 * need to be guarded!
829 mtesr r4 /* clear Exception Syndrome Reg */
830 mttcr r4 /* clear Timer Control Reg */
831 mtxer r4 /* clear Fixed-Point Exception Reg */
832 mtevpr r4 /* clear Exception Vector Prefix Reg */
833 addi r4,r0,(0xFFFF-0x10000) /* set r4 to 0xFFFFFFFF (status in the */
834 /* dbsr is cleared by setting bits to 1) */
835 mtdbsr r4 /* clear/reset the dbsr */
837 /* Invalidate the i- and d-caches. */
841 /* Set-up icache cacheability. */
842 lis r4, CONFIG_SYS_ICACHE_SACR_VALUE@h
843 ori r4, r4, CONFIG_SYS_ICACHE_SACR_VALUE@l
847 /* Set-up dcache cacheability. */
848 lis r4, CONFIG_SYS_DCACHE_SACR_VALUE@h
849 ori r4, r4, CONFIG_SYS_DCACHE_SACR_VALUE@l
852 #if !(defined(CONFIG_SYS_EBC_PB0AP) && defined(CONFIG_SYS_EBC_PB0CR))\
853 && !defined (CONFIG_XILINX_405)
854 /*----------------------------------------------------------------------- */
855 /* Tune the speed and size for flash CS0 */
856 /*----------------------------------------------------------------------- */
857 bl ext_bus_cntlr_init
860 #if !(defined(CONFIG_SYS_INIT_DCACHE_CS) || defined(CONFIG_SYS_TEMP_STACK_OCM))
862 * For boards that don't have OCM and can't use the data cache
863 * for their primordial stack, setup stack here directly after the
864 * SDRAM is initialized in ext_bus_cntlr_init.
866 lis r1, CONFIG_SYS_INIT_RAM_ADDR@h
867 ori r1,r1,CONFIG_SYS_INIT_SP_OFFSET /* set up the stack in SDRAM */
869 li r0, 0 /* Make room for stack frame header and */
870 stwu r0, -4(r1) /* clear final stack frame so that */
871 stwu r0, -4(r1) /* stack backtraces terminate cleanly */
873 * Set up a dummy frame to store reset vector as return address.
874 * this causes stack underflow to reset board.
876 stwu r1, -8(r1) /* Save back chain and move SP */
877 lis r0, RESET_VECTOR@h /* Address of reset vector */
878 ori r0, r0, RESET_VECTOR@l
879 stwu r1, -8(r1) /* Save back chain and move SP */
880 stw r0, +12(r1) /* Save return addr (underflow vect) */
881 #endif /* !(CONFIG_SYS_INIT_DCACHE_CS || !CONFIG_SYS_TEM_STACK_OCM) */
883 #if defined(CONFIG_405EP)
884 /*----------------------------------------------------------------------- */
885 /* DMA Status, clear to come up clean */
886 /*----------------------------------------------------------------------- */
887 addis r3,r0, 0xFFFF /* Clear all existing DMA status */
891 bl ppc405ep_init /* do ppc405ep specific init */
892 #endif /* CONFIG_405EP */
894 #if defined(CONFIG_SYS_OCM_DATA_ADDR) && defined(CONFIG_SYS_OCM_DATA_SIZE)
895 #if defined(CONFIG_405EZ)
896 /********************************************************************
897 * Setup OCM - On Chip Memory - PPC405EZ uses OCM Controller V2
898 *******************************************************************/
900 * We can map the OCM on the PLB3, so map it at
901 * CONFIG_SYS_OCM_DATA_ADDR + 0x8000
903 lis r3,CONFIG_SYS_OCM_DATA_ADDR@h /* OCM location */
904 ori r3,r3,CONFIG_SYS_OCM_DATA_ADDR@l
905 ori r3,r3,0x0270 /* 16K for Bank 1, R/W/Enable */
906 mtdcr OCM0_PLBCR1,r3 /* Set PLB Access */
907 ori r3,r3,0x4000 /* Add 0x4000 for bank 2 */
908 mtdcr OCM0_PLBCR2,r3 /* Set PLB Access */
911 lis r3,CONFIG_SYS_OCM_DATA_ADDR@h /* OCM location */
912 ori r3,r3,CONFIG_SYS_OCM_DATA_ADDR@l
913 ori r3,r3,0x0270 /* 16K for Bank 1, R/W/Enable */
914 mtdcr OCM0_DSRC1, r3 /* Set Data Side */
915 mtdcr OCM0_ISRC1, r3 /* Set Instruction Side */
916 ori r3,r3,0x4000 /* Add 0x4000 for bank 2 */
917 mtdcr OCM0_DSRC2, r3 /* Set Data Side */
918 mtdcr OCM0_ISRC2, r3 /* Set Instruction Side */
919 addis r3,0,0x0800 /* OCM Data Parity Disable - 1 Wait State */
923 #else /* CONFIG_405EZ */
924 /********************************************************************
925 * Setup OCM - On Chip Memory
926 *******************************************************************/
930 mfdcr r3, OCM0_ISCNTL /* get instr-side IRAM config */
931 mfdcr r4, OCM0_DSCNTL /* get data-side IRAM config */
932 and r3, r3, r0 /* disable data-side IRAM */
933 and r4, r4, r0 /* disable data-side IRAM */
934 mtdcr OCM0_ISCNTL, r3 /* set instr-side IRAM config */
935 mtdcr OCM0_DSCNTL, r4 /* set data-side IRAM config */
938 lis r3,CONFIG_SYS_OCM_DATA_ADDR@h /* OCM location */
939 ori r3,r3,CONFIG_SYS_OCM_DATA_ADDR@l
941 addis r4, 0, 0xC000 /* OCM data area enabled */
942 mtdcr OCM0_DSCNTL, r4
944 #endif /* CONFIG_405EZ */
947 /*----------------------------------------------------------------------- */
948 /* Setup temporary stack in DCACHE or OCM if needed for SDRAM SPD. */
949 /*----------------------------------------------------------------------- */
950 #ifdef CONFIG_SYS_INIT_DCACHE_CS
952 mtdcr EBC0_CFGADDR, r4
953 lis r4, CONFIG_SYS_INIT_DCACHE_PBxAR@h
954 ori r4, r4, CONFIG_SYS_INIT_DCACHE_PBxAR@l
955 mtdcr EBC0_CFGDATA, r4
958 mtdcr EBC0_CFGADDR, r4
959 lis r4, CONFIG_SYS_INIT_DCACHE_PBxCR@h
960 ori r4, r4, CONFIG_SYS_INIT_DCACHE_PBxCR@l
961 mtdcr EBC0_CFGDATA, r4
964 * Enable the data cache for the 128MB storage access control region
965 * at CONFIG_SYS_INIT_RAM_ADDR.
968 oris r4, r4, PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@h
969 ori r4, r4, PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@l
973 * Preallocate data cache lines to be used to avoid a subsequent
974 * cache miss and an ensuing machine check exception when exceptions
979 lis r3, CONFIG_SYS_INIT_RAM_ADDR@h
980 ori r3, r3, CONFIG_SYS_INIT_RAM_ADDR@l
982 lis r4, CONFIG_SYS_INIT_RAM_SIZE@h
983 ori r4, r4, CONFIG_SYS_INIT_RAM_SIZE@l
986 * Convert the size, in bytes, to the number of cache lines/blocks
989 clrlwi. r5, r4, (32 - L1_CACHE_SHIFT)
990 srwi r5, r4, L1_CACHE_SHIFT
996 /* Preallocate the computed number of cache blocks. */
997 ..alloc_dcache_block:
999 addi r3, r3, L1_CACHE_BYTES
1000 bdnz ..alloc_dcache_block
1004 * Load the initial stack pointer and data area and convert the size,
1005 * in bytes, to the number of words to initialize to a known value.
1007 lis r1, CONFIG_SYS_INIT_RAM_ADDR@h
1008 ori r1, r1, CONFIG_SYS_INIT_SP_OFFSET@l
1010 lis r4, (CONFIG_SYS_INIT_RAM_SIZE >> 2)@h
1011 ori r4, r4, (CONFIG_SYS_INIT_RAM_SIZE >> 2)@l
1014 lis r2, CONFIG_SYS_INIT_RAM_ADDR@h
1015 ori r2, r2, CONFIG_SYS_INIT_RAM_SIZE@l
1017 lis r4, CONFIG_SYS_INIT_RAM_PATTERN@h
1018 ori r4, r4, CONFIG_SYS_INIT_RAM_PATTERN@l
1025 * Make room for stack frame header and clear final stack frame so
1026 * that stack backtraces terminate cleanly.
1032 * Set up a dummy frame to store reset vector as return address.
1033 * this causes stack underflow to reset board.
1035 stwu r1, -8(r1) /* Save back chain and move SP */
1036 addis r0, 0, RESET_VECTOR@h /* Address of reset vector */
1037 ori r0, r0, RESET_VECTOR@l
1038 stwu r1, -8(r1) /* Save back chain and move SP */
1039 stw r0, +12(r1) /* Save return addr (underflow vect) */
1041 #elif defined(CONFIG_SYS_TEMP_STACK_OCM) && \
1042 (defined(CONFIG_SYS_OCM_DATA_ADDR) && defined(CONFIG_SYS_OCM_DATA_SIZE))
1047 /* Set up Stack at top of OCM */
1048 lis r1, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET)@h
1049 ori r1, r1, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET)@l
1051 /* Set up a zeroized stack frame so that backtrace works right */
1057 * Set up a dummy frame to store reset vector as return address.
1058 * this causes stack underflow to reset board.
1060 stwu r1, -8(r1) /* Save back chain and move SP */
1061 lis r0, RESET_VECTOR@h /* Address of reset vector */
1062 ori r0, r0, RESET_VECTOR@l
1063 stwu r1, -8(r1) /* Save back chain and move SP */
1064 stw r0, +12(r1) /* Save return addr (underflow vect) */
1065 #endif /* CONFIG_SYS_INIT_DCACHE_CS */
1067 #ifdef CONFIG_NAND_SPL
1068 bl nand_boot_common /* will not return */
1070 GET_GOT /* initialize GOT access */
1072 bl cpu_init_f /* run low-level CPU init code (from Flash) */
1074 bl board_init_f /* run first part of init code (from Flash) */
1075 /* NOTREACHED - board_init_f() does not return */
1077 #endif /* CONFIG_NAND_SPL */
1079 #endif /* CONFIG_405GP || CONFIG_405CR || CONFIG_405 || CONFIG_405EP */
1080 /*----------------------------------------------------------------------- */
1083 #ifndef CONFIG_NAND_SPL
1085 * This code finishes saving the registers to the exception frame
1086 * and jumps to the appropriate handler for the exception.
1087 * Register r21 is pointer into trap frame, r1 has new stack pointer.
1089 .globl transfer_to_handler
1090 transfer_to_handler:
1100 andi. r24,r23,0x3f00 /* get vector offset */
1104 mtspr SPRG2,r22 /* r1 is now kernel sp */
1105 lwz r24,0(r23) /* virtual address of handler */
1106 lwz r23,4(r23) /* where to go when done */
1111 rfi /* jump to handler, enable MMU */
1114 mfmsr r28 /* Disable interrupts */
1118 SYNC /* Some chip revs need this... */
1133 lwz r2,_NIP(r1) /* Restore environment */
1144 mfmsr r28 /* Disable interrupts */
1148 SYNC /* Some chip revs need this... */
1163 lwz r2,_NIP(r1) /* Restore environment */
1175 mfmsr r28 /* Disable interrupts */
1179 SYNC /* Some chip revs need this... */
1194 lwz r2,_NIP(r1) /* Restore environment */
1196 mtspr SPRN_MCSRR0,r2
1197 mtspr SPRN_MCSRR1,r0
1203 #endif /* CONFIG_440 */
1211 /*------------------------------------------------------------------------------- */
1212 /* Function: out16 */
1213 /* Description: Output 16 bits */
1214 /*------------------------------------------------------------------------------- */
1220 /*------------------------------------------------------------------------------- */
1221 /* Function: out16r */
1222 /* Description: Byte reverse and output 16 bits */
1223 /*------------------------------------------------------------------------------- */
1229 /*------------------------------------------------------------------------------- */
1230 /* Function: out32r */
1231 /* Description: Byte reverse and output 32 bits */
1232 /*------------------------------------------------------------------------------- */
1238 /*------------------------------------------------------------------------------- */
1239 /* Function: in16 */
1240 /* Description: Input 16 bits */
1241 /*------------------------------------------------------------------------------- */
1247 /*------------------------------------------------------------------------------- */
1248 /* Function: in16r */
1249 /* Description: Input 16 bits and byte reverse */
1250 /*------------------------------------------------------------------------------- */
1256 /*------------------------------------------------------------------------------- */
1257 /* Function: in32r */
1258 /* Description: Input 32 bits and byte reverse */
1259 /*------------------------------------------------------------------------------- */
1266 * void relocate_code (addr_sp, gd, addr_moni)
1268 * This "function" does not return, instead it continues in RAM
1269 * after relocating the monitor code.
1271 * r3 = Relocated stack pointer
1272 * r4 = Relocated global data pointer
1273 * r5 = Relocated text pointer
1275 .globl relocate_code
1277 #if defined(CONFIG_4xx_DCACHE) || defined(CONFIG_SYS_INIT_DCACHE_CS)
1279 * We need to flush the initial global data (gd_t) and bd_info
1280 * before the dcache will be invalidated.
1283 /* Save registers */
1289 * Flush complete dcache, this is faster than flushing the
1290 * ranges for global_data and bd_info instead.
1294 #if defined(CONFIG_SYS_INIT_DCACHE_CS)
1296 * Undo the earlier data cache set-up for the primordial stack and
1297 * data area. First, invalidate the data cache and then disable data
1298 * cacheability for that area. Finally, restore the EBC values, if
1302 /* Invalidate the primordial stack and data area in cache */
1303 lis r3, CONFIG_SYS_INIT_RAM_ADDR@h
1304 ori r3, r3, CONFIG_SYS_INIT_RAM_ADDR@l
1306 lis r4, CONFIG_SYS_INIT_RAM_SIZE@h
1307 ori r4, r4, CONFIG_SYS_INIT_RAM_SIZE@l
1310 bl invalidate_dcache_range
1312 /* Disable cacheability for the region */
1314 lis r4, ~PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@h
1315 ori r4, r4, ~PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@l
1319 /* Restore the EBC parameters */
1321 mtdcr EBC0_CFGADDR, r3
1323 ori r3, r3, PBxAP_VAL@l
1324 mtdcr EBC0_CFGDATA, r3
1327 mtdcr EBC0_CFGADDR, r3
1329 ori r3, r3, PBxCR_VAL@l
1330 mtdcr EBC0_CFGDATA, r3
1331 #endif /* defined(CONFIG_SYS_INIT_DCACHE_CS) */
1333 /* Restore registers */
1337 #endif /* defined(CONFIG_4xx_DCACHE) || defined(CONFIG_SYS_INIT_DCACHE_CS) */
1339 #ifdef CONFIG_SYS_INIT_RAM_DCACHE
1341 * Unlock the previously locked d-cache
1345 /* set TFLOOR/NFLOOR to 0 again */
1362 /* Invalidate data cache, now no longer our stack */
1366 #endif /* CONFIG_SYS_INIT_RAM_DCACHE */
1369 * On some 440er platforms the cache is enabled in the first TLB (Boot-CS)
1370 * to speed up the boot process. Now this cache needs to be disabled.
1372 #if defined(CONFIG_440)
1373 /* Clear all potential pending exceptions */
1376 addi r1,r0,CONFIG_SYS_TLB_FOR_BOOT_FLASH /* Use defined TLB */
1377 tlbre r0,r1,0x0002 /* Read contents */
1378 ori r0,r0,0x0c00 /* Or in the inhibit, write through bit */
1379 tlbwe r0,r1,0x0002 /* Save it out */
1382 #endif /* defined(CONFIG_440) */
1383 mr r1, r3 /* Set new stack pointer */
1384 mr r9, r4 /* Save copy of Init Data pointer */
1385 mr r10, r5 /* Save copy of Destination Address */
1388 mr r3, r5 /* Destination Address */
1389 lis r4, CONFIG_SYS_MONITOR_BASE@h /* Source Address */
1390 ori r4, r4, CONFIG_SYS_MONITOR_BASE@l
1391 lwz r5, GOT(__init_end)
1393 li r6, L1_CACHE_BYTES /* Cache Line Size */
1398 * New GOT-PTR = (old GOT-PTR - CONFIG_SYS_MONITOR_BASE) + Destination Address
1404 /* First our own GOT */
1406 /* then the one used by the C code */
1416 beq cr1,4f /* In place copy is not necessary */
1417 beq 7f /* Protect against 0 count */
1436 * Now flush the cache: note that we must start from a cache aligned
1437 * address. Otherwise we might miss one cache line.
1441 beq 7f /* Always flush prefetch queue in any case */
1449 sync /* Wait for all dcbst to complete on bus */
1455 7: sync /* Wait for all icbi to complete on bus */
1459 * We are done. Do not return, instead branch to second part of board
1460 * initialization, now running from RAM.
1463 addi r0, r10, in_ram - _start + _START_OFFSET
1465 blr /* NEVER RETURNS! */
1470 * Relocation Function, r12 point to got2+0x8000
1472 * Adjust got2 pointers, no need to check for 0, this code
1473 * already puts a few entries in the table.
1475 li r0,__got2_entries@sectoff@l
1476 la r3,GOT(_GOT2_TABLE_)
1477 lwz r11,GOT(_GOT2_TABLE_)
1489 * Now adjust the fixups and the pointers to the fixups
1490 * in case we need to move ourselves again.
1492 li r0,__fixup_entries@sectoff@l
1493 lwz r3,GOT(_FIXUP_TABLE_)
1509 * Now clear BSS segment
1511 lwz r3,GOT(__bss_start)
1512 lwz r4,GOT(__bss_end__)
1534 mr r3, r9 /* Init Data pointer */
1535 mr r4, r10 /* Destination Address */
1539 * Copy exception vector code to low memory
1542 * r7: source address, r8: end address, r9: target address
1546 mflr r4 /* save link register */
1548 lwz r7, GOT(_start_of_vectors)
1549 lwz r8, GOT(_end_of_vectors)
1551 li r9, 0x100 /* reset vector always at 0x100 */
1554 bgelr /* return if r7>=r8 - just in case */
1564 * relocate `hdlr' and `int_return' entries
1566 li r7, .L_MachineCheck - _start + _START_OFFSET
1567 li r8, Alignment - _start + _START_OFFSET
1570 addi r7, r7, 0x100 /* next exception vector */
1574 li r7, .L_Alignment - _start + _START_OFFSET
1577 li r7, .L_ProgramCheck - _start + _START_OFFSET
1581 li r7, .L_FPUnavailable - _start + _START_OFFSET
1584 li r7, .L_Decrementer - _start + _START_OFFSET
1587 li r7, .L_APU - _start + _START_OFFSET
1590 li r7, .L_InstructionTLBError - _start + _START_OFFSET
1593 li r7, .L_DataTLBError - _start + _START_OFFSET
1595 #else /* CONFIG_440 */
1596 li r7, .L_PIT - _start + _START_OFFSET
1599 li r7, .L_InstructionTLBMiss - _start + _START_OFFSET
1602 li r7, .L_DataTLBMiss - _start + _START_OFFSET
1604 #endif /* CONFIG_440 */
1606 li r7, .L_DebugBreakpoint - _start + _START_OFFSET
1609 #if !defined(CONFIG_440)
1610 addi r7,r0,0x1000 /* set ME bit (Machine Exceptions) */
1611 oris r7,r7,0x0002 /* set CE bit (Critical Exceptions) */
1612 mtmsr r7 /* change MSR */
1615 b __440_msr_continue
1618 addi r7,r0,0x1000 /* set ME bit (Machine Exceptions) */
1619 oris r7,r7,0x0002 /* set CE bit (Critical Exceptions) */
1627 mtlr r4 /* restore link register */
1630 #if defined(CONFIG_440)
1631 /*----------------------------------------------------------------------------+
1633 +----------------------------------------------------------------------------*/
1634 function_prolog(dcbz_area)
1635 rlwinm. r5,r4,0,27,31
1636 rlwinm r5,r4,27,5,31
1645 function_epilog(dcbz_area)
1646 #endif /* CONFIG_440 */
1647 #endif /* CONFIG_NAND_SPL */
1649 /*------------------------------------------------------------------------------- */
1651 /* Description: Input 8 bits */
1652 /*------------------------------------------------------------------------------- */
1658 /*------------------------------------------------------------------------------- */
1659 /* Function: out8 */
1660 /* Description: Output 8 bits */
1661 /*------------------------------------------------------------------------------- */
1667 /*------------------------------------------------------------------------------- */
1668 /* Function: out32 */
1669 /* Description: Output 32 bits */
1670 /*------------------------------------------------------------------------------- */
1676 /*------------------------------------------------------------------------------- */
1677 /* Function: in32 */
1678 /* Description: Input 32 bits */
1679 /*------------------------------------------------------------------------------- */
1685 /**************************************************************************/
1686 /* PPC405EP specific stuff */
1687 /**************************************************************************/
1691 #ifdef CONFIG_BUBINGA
1693 * Initialize EBC chip selects 1 & 4 and GPIO pins (for alternate
1694 * function) to support FPGA and NVRAM accesses below.
1697 lis r3,GPIO0_OSRH@h /* config GPIO output select */
1698 ori r3,r3,GPIO0_OSRH@l
1699 lis r4,CONFIG_SYS_GPIO0_OSRH@h
1700 ori r4,r4,CONFIG_SYS_GPIO0_OSRH@l
1703 ori r3,r3,GPIO0_OSRL@l
1704 lis r4,CONFIG_SYS_GPIO0_OSRL@h
1705 ori r4,r4,CONFIG_SYS_GPIO0_OSRL@l
1708 lis r3,GPIO0_ISR1H@h /* config GPIO input select */
1709 ori r3,r3,GPIO0_ISR1H@l
1710 lis r4,CONFIG_SYS_GPIO0_ISR1H@h
1711 ori r4,r4,CONFIG_SYS_GPIO0_ISR1H@l
1713 lis r3,GPIO0_ISR1L@h
1714 ori r3,r3,GPIO0_ISR1L@l
1715 lis r4,CONFIG_SYS_GPIO0_ISR1L@h
1716 ori r4,r4,CONFIG_SYS_GPIO0_ISR1L@l
1719 lis r3,GPIO0_TSRH@h /* config GPIO three-state select */
1720 ori r3,r3,GPIO0_TSRH@l
1721 lis r4,CONFIG_SYS_GPIO0_TSRH@h
1722 ori r4,r4,CONFIG_SYS_GPIO0_TSRH@l
1725 ori r3,r3,GPIO0_TSRL@l
1726 lis r4,CONFIG_SYS_GPIO0_TSRL@h
1727 ori r4,r4,CONFIG_SYS_GPIO0_TSRL@l
1730 lis r3,GPIO0_TCR@h /* config GPIO driver output enables */
1731 ori r3,r3,GPIO0_TCR@l
1732 lis r4,CONFIG_SYS_GPIO0_TCR@h
1733 ori r4,r4,CONFIG_SYS_GPIO0_TCR@l
1736 li r3,PB1AP /* program EBC bank 1 for RTC access */
1737 mtdcr EBC0_CFGADDR,r3
1738 lis r3,CONFIG_SYS_EBC_PB1AP@h
1739 ori r3,r3,CONFIG_SYS_EBC_PB1AP@l
1740 mtdcr EBC0_CFGDATA,r3
1742 mtdcr EBC0_CFGADDR,r3
1743 lis r3,CONFIG_SYS_EBC_PB1CR@h
1744 ori r3,r3,CONFIG_SYS_EBC_PB1CR@l
1745 mtdcr EBC0_CFGDATA,r3
1747 li r3,PB1AP /* program EBC bank 1 for RTC access */
1748 mtdcr EBC0_CFGADDR,r3
1749 lis r3,CONFIG_SYS_EBC_PB1AP@h
1750 ori r3,r3,CONFIG_SYS_EBC_PB1AP@l
1751 mtdcr EBC0_CFGDATA,r3
1753 mtdcr EBC0_CFGADDR,r3
1754 lis r3,CONFIG_SYS_EBC_PB1CR@h
1755 ori r3,r3,CONFIG_SYS_EBC_PB1CR@l
1756 mtdcr EBC0_CFGDATA,r3
1758 li r3,PB4AP /* program EBC bank 4 for FPGA access */
1759 mtdcr EBC0_CFGADDR,r3
1760 lis r3,CONFIG_SYS_EBC_PB4AP@h
1761 ori r3,r3,CONFIG_SYS_EBC_PB4AP@l
1762 mtdcr EBC0_CFGDATA,r3
1764 mtdcr EBC0_CFGADDR,r3
1765 lis r3,CONFIG_SYS_EBC_PB4CR@h
1766 ori r3,r3,CONFIG_SYS_EBC_PB4CR@l
1767 mtdcr EBC0_CFGDATA,r3
1771 !-----------------------------------------------------------------------
1772 ! Check to see if chip is in bypass mode.
1773 ! If so, write stored CPC0_PLLMR0 and CPC0_PLLMR1 values and perform a
1774 ! CPU reset Otherwise, skip this step and keep going.
1775 ! Note: Running BIOS in bypass mode is not supported since PLB speed
1776 ! will not be fast enough for the SDRAM (min 66MHz)
1777 !-----------------------------------------------------------------------
1779 mfdcr r5, CPC0_PLLMR1
1780 rlwinm r4,r5,1,0x1 /* get system clock source (SSCS) */
1783 beq pll_done /* if SSCS =b'1' then PLL has */
1784 /* already been set */
1785 /* and CPU has been reset */
1786 /* so skip to next section */
1788 #ifdef CONFIG_BUBINGA
1790 !-----------------------------------------------------------------------
1791 ! Read NVRAM to get value to write in PLLMR.
1792 ! If value has not been correctly saved, write default value
1793 ! Default config values (assuming on-board 33MHz SYS_CLK) are above.
1794 ! See CPU_DEFAULT_200 and CPU_DEFAULT_266 above.
1796 ! WARNING: This code assumes the first three words in the nvram_t
1797 ! structure in openbios.h. Changing the beginning of
1798 ! the structure will break this code.
1800 !-----------------------------------------------------------------------
1802 addis r3,0,NVRAM_BASE@h
1803 addi r3,r3,NVRAM_BASE@l
1806 addis r5,0,NVRVFY1@h
1807 addi r5,r5,NVRVFY1@l
1808 cmp cr0,0,r4,r5 /* Compare 1st NVRAM Magic number*/
1812 addis r5,0,NVRVFY2@h
1813 addi r5,r5,NVRVFY2@l
1814 cmp cr0,0,r4,r5 /* Compare 2 NVRAM Magic number */
1816 addi r3,r3,8 /* Skip over conf_size */
1817 lwz r4, 4(r3) /* Load PLLMR1 value from NVRAM */
1818 lwz r3, 0(r3) /* Load PLLMR0 value from NVRAM */
1819 rlwinm r5,r4,1,0x1 /* get system clock source (SSCS) */
1820 cmpi cr0,0,r5,1 /* See if PLL is locked */
1823 #endif /* CONFIG_BUBINGA */
1827 andi. r5, r4, CPC0_BOOT_SEP@l
1828 bne strap_1 /* serial eeprom present */
1829 addis r5,0,CPLD_REG0_ADDR@h
1830 ori r5,r5,CPLD_REG0_ADDR@l
1833 #endif /* CONFIG_TAIHU */
1835 #if defined(CONFIG_ZEUS)
1837 andi. r5, r4, CPC0_BOOT_SEP@l
1838 bne strap_1 /* serial eeprom present */
1845 mfdcr r3, CPC0_PLLMR0
1846 mfdcr r4, CPC0_PLLMR1
1850 addis r3,0,PLLMR0_DEFAULT@h /* PLLMR0 default value */
1851 ori r3,r3,PLLMR0_DEFAULT@l /* */
1852 addis r4,0,PLLMR1_DEFAULT@h /* PLLMR1 default value */
1853 ori r4,r4,PLLMR1_DEFAULT@l /* */
1858 addis r3,0,PLLMR0_DEFAULT_PCI66@h
1859 ori r3,r3,PLLMR0_DEFAULT_PCI66@l
1860 addis r4,0,PLLMR1_DEFAULT_PCI66@h
1861 ori r4,r4,PLLMR1_DEFAULT_PCI66@l
1864 mfdcr r3, CPC0_PLLMR0
1865 mfdcr r4, CPC0_PLLMR1
1866 #endif /* CONFIG_TAIHU */
1869 b pll_write /* Write the CPC0_PLLMR with new value */
1873 !-----------------------------------------------------------------------
1874 ! Clear Soft Reset Register
1875 ! This is needed to enable PCI if not booting from serial EPROM
1876 !-----------------------------------------------------------------------
1886 blr /* return to main code */
1889 !-----------------------------------------------------------------------------
1890 ! Function: pll_write
1891 ! Description: Updates the value of the CPC0_PLLMR according to CMOS27E documentation
1893 ! 1. Pll is first disabled (de-activated by putting in bypass mode)
1895 ! 3. Clock dividers are set while PLL is held in reset and bypassed
1896 ! 4. PLL Reset is cleared
1897 ! 5. Wait 100us for PLL to lock
1898 ! 6. A core reset is performed
1899 ! Input: r3 = Value to write to CPC0_PLLMR0
1900 ! Input: r4 = Value to write to CPC0_PLLMR1
1902 !-----------------------------------------------------------------------------
1908 ori r5,r5,0x0101 /* Stop the UART clocks */
1909 mtdcr CPC0_UCR,r5 /* Before changing PLL */
1911 mfdcr r5, CPC0_PLLMR1
1912 rlwinm r5,r5,0,0x7FFFFFFF /* Disable PLL */
1913 mtdcr CPC0_PLLMR1,r5
1914 oris r5,r5,0x4000 /* Set PLL Reset */
1915 mtdcr CPC0_PLLMR1,r5
1917 mtdcr CPC0_PLLMR0,r3 /* Set clock dividers */
1918 rlwinm r5,r4,0,0x3FFFFFFF /* Reset & Bypass new PLL dividers */
1919 oris r5,r5,0x4000 /* Set PLL Reset */
1920 mtdcr CPC0_PLLMR1,r5 /* Set clock dividers */
1921 rlwinm r5,r5,0,0xBFFFFFFF /* Clear PLL Reset */
1922 mtdcr CPC0_PLLMR1,r5
1925 ! Wait min of 100us for PLL to lock.
1926 ! See CMOS 27E databook for more info.
1927 ! At 200MHz, that means waiting 20,000 instructions
1929 addi r3,0,20000 /* 2000 = 0x4e20 */
1934 oris r5,r5,0x8000 /* Enable PLL */
1935 mtdcr CPC0_PLLMR1,r5 /* Engage */
1938 * Reset CPU to guarantee timings are OK
1939 * Not sure if this is needed...
1942 mtspr SPRN_DBCR0,r3 /* This will cause a CPU core reset, and */
1943 /* execution will continue from the poweron */
1944 /* vector of 0xfffffffc */
1945 #endif /* CONFIG_405EP */
1947 #if defined(CONFIG_440)
1948 /*----------------------------------------------------------------------------+
1950 +----------------------------------------------------------------------------*/
1951 function_prolog(mttlb3)
1954 function_epilog(mttlb3)
1956 /*----------------------------------------------------------------------------+
1958 +----------------------------------------------------------------------------*/
1959 function_prolog(mftlb3)
1962 function_epilog(mftlb3)
1964 /*----------------------------------------------------------------------------+
1966 +----------------------------------------------------------------------------*/
1967 function_prolog(mttlb2)
1970 function_epilog(mttlb2)
1972 /*----------------------------------------------------------------------------+
1974 +----------------------------------------------------------------------------*/
1975 function_prolog(mftlb2)
1978 function_epilog(mftlb2)
1980 /*----------------------------------------------------------------------------+
1982 +----------------------------------------------------------------------------*/
1983 function_prolog(mttlb1)
1986 function_epilog(mttlb1)
1988 /*----------------------------------------------------------------------------+
1990 +----------------------------------------------------------------------------*/
1991 function_prolog(mftlb1)
1994 function_epilog(mftlb1)
1995 #endif /* CONFIG_440 */
1997 #if defined(CONFIG_NAND_SPL)
1999 * void nand_boot_relocate(dst, src, bytes)
2001 * r3 = Destination address to copy code to (in SDRAM)
2002 * r4 = Source address to copy code from
2003 * r5 = size to copy in bytes
2011 * Copy SPL from icache into SDRAM
2023 * Calculate "corrected" link register, so that we "continue"
2024 * in execution in destination range
2026 sub r3,r7,r6 /* r3 = src - dst */
2027 sub r8,r8,r3 /* r8 = link-reg - (src - dst) */
2033 * First initialize SDRAM. It has to be available *before* calling
2036 lis r3,CONFIG_SYS_SDRAM_BASE@h
2037 ori r3,r3,CONFIG_SYS_SDRAM_BASE@l
2041 * Now copy the 4k SPL code into SDRAM and continue execution
2044 lis r3,CONFIG_SYS_NAND_BOOT_SPL_DST@h
2045 ori r3,r3,CONFIG_SYS_NAND_BOOT_SPL_DST@l
2046 lis r4,CONFIG_SYS_NAND_BOOT_SPL_SRC@h
2047 ori r4,r4,CONFIG_SYS_NAND_BOOT_SPL_SRC@l
2048 lis r5,CONFIG_SYS_NAND_BOOT_SPL_SIZE@h
2049 ori r5,r5,CONFIG_SYS_NAND_BOOT_SPL_SIZE@l
2050 bl nand_boot_relocate
2053 * We're running from SDRAM now!!!
2055 * It is necessary for 4xx systems to relocate from running at
2056 * the original location (0xfffffxxx) to somewhere else (SDRAM
2057 * preferably). This is because CS0 needs to be reconfigured for
2058 * NAND access. And we can't reconfigure this CS when currently
2059 * "running" from it.
2063 * Finally call nand_boot() to load main NAND U-Boot image from
2064 * NAND and jump to it.
2066 bl nand_boot /* will not return */
2067 #endif /* CONFIG_NAND_SPL */