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 * SPDX-License-Identifier: GPL-2.0 IBM-pibs
13 * Startup code for IBM/AMCC PowerPC 4xx (PPC4xx) based boards
15 * The following description only applies to the NOR flash style booting.
16 * NAND booting is different. For more details about NAND booting on 4xx
17 * take a look at doc/README.nand-boot-ppc440.
19 * The CPU starts at address 0xfffffffc (last word in the address space).
20 * The U-Boot image therefore has to be located in the "upper" area of the
21 * flash (e.g. 512MiB - 0xfff80000 ... 0xffffffff). The default value for
22 * the boot chip-select (CS0) is quite big and covers this area. On the
23 * 405EX this is for example 0xffe00000 ... 0xffffffff. U-Boot will
24 * reconfigure this CS0 (and other chip-selects as well when configured
25 * this way) in the boot process to the "correct" values matching the
29 #include <asm-offsets.h>
31 #include <asm/ppc4xx.h>
34 #include <ppc_asm.tmpl>
37 #include <asm/cache.h>
39 #include <asm/ppc4xx-isram.h>
41 #ifdef CONFIG_SYS_INIT_DCACHE_CS
42 # if (CONFIG_SYS_INIT_DCACHE_CS == 0)
45 # if (defined(CONFIG_SYS_EBC_PB0AP) && defined(CONFIG_SYS_EBC_PB0CR))
46 # define PBxAP_VAL CONFIG_SYS_EBC_PB0AP
47 # define PBxCR_VAL CONFIG_SYS_EBC_PB0CR
50 # if (CONFIG_SYS_INIT_DCACHE_CS == 1)
53 # if (defined(CONFIG_SYS_EBC_PB1AP) && defined(CONFIG_SYS_EBC_PB1CR))
54 # define PBxAP_VAL CONFIG_SYS_EBC_PB1AP
55 # define PBxCR_VAL CONFIG_SYS_EBC_PB1CR
58 # if (CONFIG_SYS_INIT_DCACHE_CS == 2)
61 # if (defined(CONFIG_SYS_EBC_PB2AP) && defined(CONFIG_SYS_EBC_PB2CR))
62 # define PBxAP_VAL CONFIG_SYS_EBC_PB2AP
63 # define PBxCR_VAL CONFIG_SYS_EBC_PB2CR
66 # if (CONFIG_SYS_INIT_DCACHE_CS == 3)
69 # if (defined(CONFIG_SYS_EBC_PB3AP) && defined(CONFIG_SYS_EBC_PB3CR))
70 # define PBxAP_VAL CONFIG_SYS_EBC_PB3AP
71 # define PBxCR_VAL CONFIG_SYS_EBC_PB3CR
74 # if (CONFIG_SYS_INIT_DCACHE_CS == 4)
77 # if (defined(CONFIG_SYS_EBC_PB4AP) && defined(CONFIG_SYS_EBC_PB4CR))
78 # define PBxAP_VAL CONFIG_SYS_EBC_PB4AP
79 # define PBxCR_VAL CONFIG_SYS_EBC_PB4CR
82 # if (CONFIG_SYS_INIT_DCACHE_CS == 5)
85 # if (defined(CONFIG_SYS_EBC_PB5AP) && defined(CONFIG_SYS_EBC_PB5CR))
86 # define PBxAP_VAL CONFIG_SYS_EBC_PB5AP
87 # define PBxCR_VAL CONFIG_SYS_EBC_PB5CR
90 # if (CONFIG_SYS_INIT_DCACHE_CS == 6)
93 # if (defined(CONFIG_SYS_EBC_PB6AP) && defined(CONFIG_SYS_EBC_PB6CR))
94 # define PBxAP_VAL CONFIG_SYS_EBC_PB6AP
95 # define PBxCR_VAL CONFIG_SYS_EBC_PB6CR
98 # if (CONFIG_SYS_INIT_DCACHE_CS == 7)
101 # if (defined(CONFIG_SYS_EBC_PB7AP) && defined(CONFIG_SYS_EBC_PB7CR))
102 # define PBxAP_VAL CONFIG_SYS_EBC_PB7AP
103 # define PBxCR_VAL CONFIG_SYS_EBC_PB7CR
113 * Memory Bank x (nothingness) initialization CONFIG_SYS_INIT_RAM_ADDR + 64 MiB
114 * used as temporary stack pointer for the primordial stack
116 # ifndef CONFIG_SYS_INIT_DCACHE_PBxAR
117 # define CONFIG_SYS_INIT_DCACHE_PBxAR (EBC_BXAP_BME_DISABLED | \
118 EBC_BXAP_TWT_ENCODE(7) | \
119 EBC_BXAP_BCE_DISABLE | \
120 EBC_BXAP_BCT_2TRANS | \
121 EBC_BXAP_CSN_ENCODE(0) | \
122 EBC_BXAP_OEN_ENCODE(0) | \
123 EBC_BXAP_WBN_ENCODE(0) | \
124 EBC_BXAP_WBF_ENCODE(0) | \
125 EBC_BXAP_TH_ENCODE(2) | \
126 EBC_BXAP_RE_DISABLED | \
127 EBC_BXAP_SOR_NONDELAYED | \
128 EBC_BXAP_BEM_WRITEONLY | \
129 EBC_BXAP_PEN_DISABLED)
130 # endif /* CONFIG_SYS_INIT_DCACHE_PBxAR */
131 # ifndef CONFIG_SYS_INIT_DCACHE_PBxCR
132 # define CONFIG_SYS_INIT_DCACHE_PBxCR (EBC_BXCR_BAS_ENCODE(CONFIG_SYS_INIT_RAM_ADDR) | \
136 # endif /* CONFIG_SYS_INIT_DCACHE_PBxCR */
137 # ifndef CONFIG_SYS_INIT_RAM_PATTERN
138 # define CONFIG_SYS_INIT_RAM_PATTERN 0xDEADDEAD
140 #endif /* CONFIG_SYS_INIT_DCACHE_CS */
142 #if (defined(CONFIG_SYS_INIT_RAM_DCACHE) && (CONFIG_SYS_INIT_RAM_SIZE > (4 << 10)))
143 #error Only 4k of init-ram is supported - please adjust CONFIG_SYS_INIT_RAM_SIZE!
147 * Unless otherwise overriden, enable two 128MB cachable instruction regions
148 * at CONFIG_SYS_SDRAM_BASE and another 128MB cacheable instruction region covering
149 * NOR flash at CONFIG_SYS_FLASH_BASE. Disable all cacheable data regions.
151 #if !defined(CONFIG_SYS_FLASH_BASE)
152 /* If not already defined, set it to the "last" 128MByte region */
153 # define CONFIG_SYS_FLASH_BASE 0xf8000000
155 #if !defined(CONFIG_SYS_ICACHE_SACR_VALUE)
156 # define CONFIG_SYS_ICACHE_SACR_VALUE \
157 (PPC_128MB_SACR_VALUE(CONFIG_SYS_SDRAM_BASE + ( 0 << 20)) | \
158 PPC_128MB_SACR_VALUE(CONFIG_SYS_SDRAM_BASE + (128 << 20)) | \
159 PPC_128MB_SACR_VALUE(CONFIG_SYS_FLASH_BASE))
160 #endif /* !defined(CONFIG_SYS_ICACHE_SACR_VALUE) */
162 #if !defined(CONFIG_SYS_DCACHE_SACR_VALUE)
163 # define CONFIG_SYS_DCACHE_SACR_VALUE \
165 #endif /* !defined(CONFIG_SYS_DCACHE_SACR_VALUE) */
167 #if !defined(CONFIG_SYS_TLB_FOR_BOOT_FLASH)
168 #define CONFIG_SYS_TLB_FOR_BOOT_FLASH 0 /* use TLB 0 as default */
171 #define function_prolog(func_name) .text; \
175 #define function_epilog(func_name) .type func_name,@function; \
176 .size func_name,.-func_name
178 /* We don't want the MMU yet.
181 #define MSR_KERNEL ( MSR_ME ) /* Machine Check */
184 .extern ext_bus_cntlr_init
187 * Set up GOT: Global Offset Table
189 * Use r12 to access the GOT
191 #if !defined(CONFIG_SPL_BUILD)
193 GOT_ENTRY(_GOT2_TABLE_)
194 GOT_ENTRY(_FIXUP_TABLE_)
197 GOT_ENTRY(_start_of_vectors)
198 GOT_ENTRY(_end_of_vectors)
199 GOT_ENTRY(transfer_to_handler)
201 GOT_ENTRY(__init_end)
203 GOT_ENTRY(__bss_start)
205 #endif /* CONFIG_SPL_BUILD */
207 #if defined(CONFIG_SYS_RAMBOOT) || defined(CONFIG_BOOT_FROM_XMD)
209 * 4xx RAM-booting U-Boot image is started from offset 0
215 #if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD)
217 * This is the entry of the real U-Boot from a board port
218 * that supports SPL booting on the PPC4xx. We only need
219 * to call board_init_f() here. Everything else has already
220 * been done in the SPL u-boot version.
222 GET_GOT /* initialize GOT access */
223 bl board_init_f /* run 1st part of board init code (in Flash)*/
224 /* NOTREACHED - board_init_f() does not return */
228 * 440 Startup -- on reset only the top 4k of the effective
229 * address space is mapped in by an entry in the instruction
230 * and data shadow TLB. The .bootpg section is located in the
231 * top 4k & does only what's necessary to map in the the rest
232 * of the boot rom. Once the boot rom is mapped in we can
233 * proceed with normal startup.
235 * NOTE: CS0 only covers the top 2MB of the effective address
239 #if defined(CONFIG_440)
240 .section .bootpg,"ax"
243 /**************************************************************************/
245 /*--------------------------------------------------------------------+
246 | 440EPX BUP Change - Hardware team request
247 +--------------------------------------------------------------------*/
248 #if defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
253 /*----------------------------------------------------------------+
254 | Core bug fix. Clear the esr
255 +-----------------------------------------------------------------*/
258 /*----------------------------------------------------------------*/
259 /* Clear and set up some registers. */
260 /*----------------------------------------------------------------*/
261 iccci r0,r0 /* NOTE: operands not used for 440 */
262 dccci r0,r0 /* NOTE: operands not used for 440 */
269 /* NOTE: 440GX adds machine check status regs */
270 #if defined(CONFIG_440) && !defined(CONFIG_440GP)
277 /*----------------------------------------------------------------*/
279 /*----------------------------------------------------------------*/
280 /* Disable store gathering & broadcast, guarantee inst/data
281 * cache block touch, force load/store alignment
282 * (see errata 1.12: 440_33)
284 lis r1,0x0030 /* store gathering & broadcast disable */
285 ori r1,r1,0x6000 /* cache touch */
288 /*----------------------------------------------------------------*/
289 /* Initialize debug */
290 /*----------------------------------------------------------------*/
292 andis. r1, r1, 0x8000 /* test DBCR0[EDM] bit */
293 bne skip_debug_init /* if set, don't clear debug register */
295 ori r1,r1,CCR0_DTB@l /* Disable Trace Broadcast */
309 mtspr SPRN_DBSR,r1 /* Clear all valid bits */
312 #if defined (CONFIG_440SPE)
313 /*----------------------------------------------------------------+
314 | Initialize Core Configuration Reg1.
315 | a. ICDPEI: Record even parity. Normal operation.
316 | b. ICTPEI: Record even parity. Normal operation.
317 | c. DCTPEI: Record even parity. Normal operation.
318 | d. DCDPEI: Record even parity. Normal operation.
319 | e. DCUPEI: Record even parity. Normal operation.
320 | f. DCMPEI: Record even parity. Normal operation.
321 | g. FCOM: Normal operation
322 | h. MMUPEI: Record even parity. Normal operation.
323 | i. FFF: Flush only as much data as necessary.
324 | j. TCS: Timebase increments from CPU clock.
325 +-----------------------------------------------------------------*/
329 /*----------------------------------------------------------------+
330 | Reset the timebase.
331 | The previous write to CCR1 sets the timebase source.
332 +-----------------------------------------------------------------*/
337 /*----------------------------------------------------------------*/
338 /* Setup interrupt vectors */
339 /*----------------------------------------------------------------*/
340 mtspr SPRN_IVPR,r0 /* Vectors start at 0x0000_0000 */
342 mtspr SPRN_IVOR0,r1 /* Critical input */
344 mtspr SPRN_IVOR1,r1 /* Machine check */
346 mtspr SPRN_IVOR2,r1 /* Data storage */
348 mtspr SPRN_IVOR3,r1 /* Instruction storage */
350 mtspr SPRN_IVOR4,r1 /* External interrupt */
352 mtspr SPRN_IVOR5,r1 /* Alignment */
354 mtspr SPRN_IVOR6,r1 /* Program check */
356 mtspr SPRN_IVOR7,r1 /* Floating point unavailable */
358 mtspr SPRN_IVOR8,r1 /* System call */
360 mtspr SPRN_IVOR9,r1 /* Auxiliary Processor unavailable */
362 mtspr SPRN_IVOR10,r1 /* Decrementer */
364 mtspr SPRN_IVOR13,r1 /* Data TLB error */
366 mtspr SPRN_IVOR14,r1 /* Instr TLB error */
368 mtspr SPRN_IVOR15,r1 /* Debug */
370 /*----------------------------------------------------------------*/
371 /* Configure cache regions */
372 /*----------------------------------------------------------------*/
390 /*----------------------------------------------------------------*/
391 /* Cache victim limits */
392 /*----------------------------------------------------------------*/
393 /* floors 0, ceiling max to use the entire cache -- nothing locked
400 /*----------------------------------------------------------------+
401 |Initialize MMUCR[STID] = 0.
402 +-----------------------------------------------------------------*/
409 /*----------------------------------------------------------------*/
410 /* Clear all TLB entries -- TID = 0, TS = 0 */
411 /*----------------------------------------------------------------*/
413 #ifdef CONFIG_SYS_RAMBOOT
414 li r4,0 /* Start with TLB #0 */
416 li r4,1 /* Start with TLB #1 */
418 li r1,64 /* 64 TLB entries */
419 sub r1,r1,r4 /* calculate last TLB # */
422 #ifdef CONFIG_SYS_RAMBOOT
423 tlbre r3,r4,0 /* Read contents from TLB word #0 to get EPN */
424 rlwinm. r3,r3,0,0xfffffc00 /* Mask EPN */
425 beq tlbnxt /* Skip EPN=0 TLB, this is the SDRAM TLB */
427 tlbwe r0,r4,0 /* Invalidate all entries (V=0)*/
430 tlbnxt: addi r4,r4,1 /* Next TLB */
433 /*----------------------------------------------------------------*/
434 /* TLB entry setup -- step thru tlbtab */
435 /*----------------------------------------------------------------*/
436 #if defined(CONFIG_440SPE_REVA)
437 /*----------------------------------------------------------------*/
438 /* We have different TLB tables for revA and rev B of 440SPe */
439 /*----------------------------------------------------------------*/
451 bl tlbtab /* Get tlbtab pointer */
454 li r1,0x003f /* 64 TLB entries max */
460 #ifdef CONFIG_SYS_RAMBOOT
461 tlbre r3,r4,0 /* Read contents from TLB word #0 */
462 rlwinm. r3,r3,0,0x00000200 /* Mask V (valid) bit */
463 bne tlbnx2 /* Skip V=1 TLB, this is the SDRAM TLB */
467 beq 2f /* 0 marks end */
470 tlbwe r0,r4,0 /* TLB Word 0 */
471 tlbwe r1,r4,1 /* TLB Word 1 */
472 tlbwe r2,r4,2 /* TLB Word 2 */
473 tlbnx2: addi r4,r4,1 /* Next TLB */
476 /*----------------------------------------------------------------*/
477 /* Continue from 'normal' start */
478 /*----------------------------------------------------------------*/
484 mtspr SPRN_SRR1,r0 /* Keep things disabled for now */
488 #endif /* CONFIG_440 */
491 * r3 - 1st arg to board_init(): IMMP pointer
492 * r4 - 2nd arg to board_init(): boot flag
494 #if !defined(CONFIG_SPL_BUILD)
496 .long 0x27051956 /* U-Boot Magic Number */
497 .globl version_string
499 .ascii U_BOOT_VERSION_STRING, "\0"
501 . = EXC_OFF_SYS_RESET
502 .globl _start_of_vectors
505 /* Critical input. */
506 CRIT_EXCEPTION(0x100, CritcalInput, UnknownException)
510 MCK_EXCEPTION(0x200, MachineCheck, MachineCheckException)
512 CRIT_EXCEPTION(0x200, MachineCheck, MachineCheckException)
513 #endif /* CONFIG_440 */
515 /* Data Storage exception. */
516 STD_EXCEPTION(0x300, DataStorage, UnknownException)
518 /* Instruction Storage exception. */
519 STD_EXCEPTION(0x400, InstStorage, UnknownException)
521 /* External Interrupt exception. */
522 STD_EXCEPTION(0x500, ExtInterrupt, external_interrupt)
524 /* Alignment exception. */
527 EXCEPTION_PROLOG(SRR0, SRR1)
532 addi r3,r1,STACK_FRAME_OVERHEAD
533 EXC_XFER_TEMPLATE(Alignment, AlignmentException, MSR_KERNEL, COPY_EE)
535 /* Program check exception */
538 EXCEPTION_PROLOG(SRR0, SRR1)
539 addi r3,r1,STACK_FRAME_OVERHEAD
540 EXC_XFER_TEMPLATE(ProgramCheck, ProgramCheckException,
544 STD_EXCEPTION(0x800, FPUnavailable, UnknownException)
545 STD_EXCEPTION(0x900, Decrementer, DecrementerPITException)
546 STD_EXCEPTION(0xa00, APU, UnknownException)
548 STD_EXCEPTION(0xc00, SystemCall, UnknownException)
551 STD_EXCEPTION(0x1300, DataTLBError, UnknownException)
552 STD_EXCEPTION(0x1400, InstructionTLBError, UnknownException)
554 STD_EXCEPTION(0x1000, PIT, DecrementerPITException)
555 STD_EXCEPTION(0x1100, InstructionTLBMiss, UnknownException)
556 STD_EXCEPTION(0x1200, DataTLBMiss, UnknownException)
558 CRIT_EXCEPTION(0x2000, DebugBreakpoint, DebugException )
560 .globl _end_of_vectors
567 #if defined(CONFIG_SPL) && !defined(CONFIG_SPL_BUILD)
569 * This is the entry of the real U-Boot from a board port
570 * that supports SPL booting on the PPC4xx. We only need
571 * to call board_init_f() here. Everything else has already
572 * been done in the SPL u-boot version.
574 GET_GOT /* initialize GOT access */
575 bl board_init_f /* run 1st part of board init code (in Flash)*/
576 /* NOTREACHED - board_init_f() does not return */
579 /*****************************************************************************/
580 #if defined(CONFIG_440)
582 /*----------------------------------------------------------------*/
583 /* Clear and set up some registers. */
584 /*----------------------------------------------------------------*/
587 mtspr SPRN_DEC,r0 /* prevent dec exceptions */
588 mtspr SPRN_TBWL,r0 /* prevent fit & wdt exceptions */
590 mtspr SPRN_TSR,r1 /* clear all timer exception status */
591 mtspr SPRN_TCR,r0 /* disable all */
592 mtspr SPRN_ESR,r0 /* clear exception syndrome register */
593 mtxer r0 /* clear integer exception register */
595 /*----------------------------------------------------------------*/
596 /* Debug setup -- some (not very good) ice's need an event*/
597 /* to establish control :-( Define CONFIG_SYS_INIT_DBCR to the dbsr */
598 /* value you need in this case 0x8cff 0000 should do the trick */
599 /*----------------------------------------------------------------*/
600 #if defined(CONFIG_SYS_INIT_DBCR)
603 mtspr SPRN_DBSR,r1 /* Clear all status bits */
604 lis r0,CONFIG_SYS_INIT_DBCR@h
605 ori r0,r0,CONFIG_SYS_INIT_DBCR@l
610 /*----------------------------------------------------------------*/
611 /* Setup the internal SRAM */
612 /*----------------------------------------------------------------*/
615 #ifdef CONFIG_SYS_INIT_RAM_DCACHE
616 /* Clear Dcache to use as RAM */
617 addis r3,r0,CONFIG_SYS_INIT_RAM_ADDR@h
618 ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l
619 addis r4,r0,CONFIG_SYS_INIT_RAM_SIZE@h
620 ori r4,r4,CONFIG_SYS_INIT_RAM_SIZE@l
621 rlwinm. r5,r4,0,27,31
633 * Lock the init-ram/stack in d-cache, so that other regions
634 * may use d-cache as well
635 * Note, that this current implementation locks exactly 4k
636 * of d-cache, so please make sure that you don't define a
637 * bigger init-ram area. Take a look at the lwmon5 440EPx
638 * implementation as a reference.
642 /* 8. set TFLOOR/NFLOOR to 8 (-> 8*16*32 bytes locked -> 4k) */
658 #endif /* CONFIG_SYS_INIT_RAM_DCACHE */
660 /* 440EP & 440GR are only 440er PPC's without internal SRAM */
661 #if !defined(CONFIG_440EP) && !defined(CONFIG_440GR)
662 /* not all PPC's have internal SRAM usable as L2-cache */
663 #if defined(CONFIG_440GX) || \
664 defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
665 defined(CONFIG_460SX)
666 mtdcr L2_CACHE_CFG,r0 /* Ensure L2 Cache is off */
667 #elif defined(CONFIG_460EX) || defined(CONFIG_460GT)
669 ori r1,r1,0x0008 /* Set L2_CACHE_CFG[RDBW]=1 */
670 mtdcr L2_CACHE_CFG,r1
676 and r1,r1,r2 /* Disable parity check */
679 and r1,r1,r2 /* Disable pwr mgmt */
682 lis r1,0x8000 /* BAS = 8000_0000 */
683 #if defined(CONFIG_440GX) || defined(CONFIG_440SP)
684 ori r1,r1,0x0980 /* first 64k */
685 mtdcr ISRAM0_SB0CR,r1
687 ori r1,r1,0x0980 /* second 64k */
688 mtdcr ISRAM0_SB1CR,r1
690 ori r1,r1, 0x0980 /* third 64k */
691 mtdcr ISRAM0_SB2CR,r1
693 ori r1,r1, 0x0980 /* fourth 64k */
694 mtdcr ISRAM0_SB3CR,r1
695 #elif defined(CONFIG_440SPE) || defined(CONFIG_460EX) || \
696 defined(CONFIG_460GT)
697 lis r1,0x0000 /* BAS = X_0000_0000 */
698 ori r1,r1,0x0984 /* first 64k */
699 mtdcr ISRAM0_SB0CR,r1
701 ori r1,r1,0x0984 /* second 64k */
702 mtdcr ISRAM0_SB1CR,r1
704 ori r1,r1, 0x0984 /* third 64k */
705 mtdcr ISRAM0_SB2CR,r1
707 ori r1,r1, 0x0984 /* fourth 64k */
708 mtdcr ISRAM0_SB3CR,r1
709 #if defined(CONFIG_460EX) || defined(CONFIG_460GT)
713 and r1,r1,r2 /* Disable parity check */
716 and r1,r1,r2 /* Disable pwr mgmt */
719 lis r1,0x0004 /* BAS = 4_0004_0000 */
720 ori r1,r1,ISRAM1_SIZE /* ocm size */
721 mtdcr ISRAM1_SB0CR,r1
723 #elif defined(CONFIG_460SX)
724 lis r1,0x0000 /* BAS = 0000_0000 */
725 ori r1,r1,0x0B84 /* first 128k */
726 mtdcr ISRAM0_SB0CR,r1
728 ori r1,r1,0x0B84 /* second 128k */
729 mtdcr ISRAM0_SB1CR,r1
731 ori r1,r1, 0x0B84 /* third 128k */
732 mtdcr ISRAM0_SB2CR,r1
734 ori r1,r1, 0x0B84 /* fourth 128k */
735 mtdcr ISRAM0_SB3CR,r1
736 #elif defined(CONFIG_440GP)
737 ori r1,r1,0x0380 /* 8k rw */
738 mtdcr ISRAM0_SB0CR,r1
739 mtdcr ISRAM0_SB1CR,r0 /* Disable bank 1 */
741 #endif /* #if !defined(CONFIG_440EP) && !defined(CONFIG_440GR) */
743 /*----------------------------------------------------------------*/
744 /* Setup the stack in internal SRAM */
745 /*----------------------------------------------------------------*/
746 lis r1,CONFIG_SYS_INIT_RAM_ADDR@h
747 ori r1,r1,CONFIG_SYS_INIT_SP_OFFSET@l
750 stwu r0,-4(r1) /* Terminate call chain */
752 stwu r1,-8(r1) /* Save back chain and move SP */
753 lis r0,RESET_VECTOR@h /* Address of reset vector */
754 ori r0,r0, RESET_VECTOR@l
755 stwu r1,-8(r1) /* Save back chain and move SP */
756 stw r0,+12(r1) /* Save return addr (underflow vect) */
758 #ifndef CONFIG_SPL_BUILD
762 bl cpu_init_f /* run low-level CPU init code (from Flash) */
763 #ifdef CONFIG_SYS_GENERIC_BOARD
773 /* NOTREACHED - board_init_f() does not return */
775 #endif /* CONFIG_440 */
777 /*****************************************************************************/
778 #if defined(CONFIG_405GP) || \
779 defined(CONFIG_405EP) || defined(CONFIG_405EZ) || \
780 defined(CONFIG_405EX) || defined(CONFIG_405)
781 /*----------------------------------------------------------------------- */
782 /* Clear and set up some registers. */
783 /*----------------------------------------------------------------------- */
785 #if !defined(CONFIG_405EX)
789 * On 405EX, completely clearing the SGR leads to PPC hangup
790 * upon PCIe configuration access. The PCIe memory regions
791 * need to be guarded!
798 mtesr r4 /* clear Exception Syndrome Reg */
799 mttcr r4 /* clear Timer Control Reg */
800 mtxer r4 /* clear Fixed-Point Exception Reg */
801 mtevpr r4 /* clear Exception Vector Prefix Reg */
802 addi r4,r0,(0xFFFF-0x10000) /* set r4 to 0xFFFFFFFF (status in the */
803 /* dbsr is cleared by setting bits to 1) */
804 mtdbsr r4 /* clear/reset the dbsr */
806 /* Invalidate the i- and d-caches. */
810 /* Set-up icache cacheability. */
811 lis r4, CONFIG_SYS_ICACHE_SACR_VALUE@h
812 ori r4, r4, CONFIG_SYS_ICACHE_SACR_VALUE@l
816 /* Set-up dcache cacheability. */
817 lis r4, CONFIG_SYS_DCACHE_SACR_VALUE@h
818 ori r4, r4, CONFIG_SYS_DCACHE_SACR_VALUE@l
821 #if !(defined(CONFIG_SYS_EBC_PB0AP) && defined(CONFIG_SYS_EBC_PB0CR))\
822 && !defined (CONFIG_XILINX_405)
823 /*----------------------------------------------------------------------- */
824 /* Tune the speed and size for flash CS0 */
825 /*----------------------------------------------------------------------- */
826 bl ext_bus_cntlr_init
829 #if !(defined(CONFIG_SYS_INIT_DCACHE_CS) || defined(CONFIG_SYS_TEMP_STACK_OCM))
831 * For boards that don't have OCM and can't use the data cache
832 * for their primordial stack, setup stack here directly after the
833 * SDRAM is initialized in ext_bus_cntlr_init.
835 lis r1, CONFIG_SYS_INIT_RAM_ADDR@h
836 ori r1,r1,CONFIG_SYS_INIT_SP_OFFSET /* set up the stack in SDRAM */
838 li r0, 0 /* Make room for stack frame header and */
839 stwu r0, -4(r1) /* clear final stack frame so that */
840 stwu r0, -4(r1) /* stack backtraces terminate cleanly */
842 * Set up a dummy frame to store reset vector as return address.
843 * this causes stack underflow to reset board.
845 stwu r1, -8(r1) /* Save back chain and move SP */
846 lis r0, RESET_VECTOR@h /* Address of reset vector */
847 ori r0, r0, RESET_VECTOR@l
848 stwu r1, -8(r1) /* Save back chain and move SP */
849 stw r0, +12(r1) /* Save return addr (underflow vect) */
850 #endif /* !(CONFIG_SYS_INIT_DCACHE_CS || !CONFIG_SYS_TEM_STACK_OCM) */
852 #if defined(CONFIG_405EP)
853 /*----------------------------------------------------------------------- */
854 /* DMA Status, clear to come up clean */
855 /*----------------------------------------------------------------------- */
856 addis r3,r0, 0xFFFF /* Clear all existing DMA status */
860 bl ppc405ep_init /* do ppc405ep specific init */
861 #endif /* CONFIG_405EP */
863 #if defined(CONFIG_SYS_OCM_DATA_ADDR) && defined(CONFIG_SYS_OCM_DATA_SIZE)
864 #if defined(CONFIG_405EZ)
865 /********************************************************************
866 * Setup OCM - On Chip Memory - PPC405EZ uses OCM Controller V2
867 *******************************************************************/
869 * We can map the OCM on the PLB3, so map it at
870 * CONFIG_SYS_OCM_DATA_ADDR + 0x8000
872 lis r3,CONFIG_SYS_OCM_DATA_ADDR@h /* OCM location */
873 ori r3,r3,CONFIG_SYS_OCM_DATA_ADDR@l
874 ori r3,r3,0x0270 /* 16K for Bank 1, R/W/Enable */
875 mtdcr OCM0_PLBCR1,r3 /* Set PLB Access */
876 ori r3,r3,0x4000 /* Add 0x4000 for bank 2 */
877 mtdcr OCM0_PLBCR2,r3 /* Set PLB Access */
880 lis r3,CONFIG_SYS_OCM_DATA_ADDR@h /* OCM location */
881 ori r3,r3,CONFIG_SYS_OCM_DATA_ADDR@l
882 ori r3,r3,0x0270 /* 16K for Bank 1, R/W/Enable */
883 mtdcr OCM0_DSRC1, r3 /* Set Data Side */
884 mtdcr OCM0_ISRC1, r3 /* Set Instruction Side */
885 ori r3,r3,0x4000 /* Add 0x4000 for bank 2 */
886 mtdcr OCM0_DSRC2, r3 /* Set Data Side */
887 mtdcr OCM0_ISRC2, r3 /* Set Instruction Side */
888 addis r3,0,0x0800 /* OCM Data Parity Disable - 1 Wait State */
892 #else /* CONFIG_405EZ */
893 /********************************************************************
894 * Setup OCM - On Chip Memory
895 *******************************************************************/
899 mfdcr r3, OCM0_ISCNTL /* get instr-side IRAM config */
900 mfdcr r4, OCM0_DSCNTL /* get data-side IRAM config */
901 and r3, r3, r0 /* disable data-side IRAM */
902 and r4, r4, r0 /* disable data-side IRAM */
903 mtdcr OCM0_ISCNTL, r3 /* set instr-side IRAM config */
904 mtdcr OCM0_DSCNTL, r4 /* set data-side IRAM config */
907 lis r3,CONFIG_SYS_OCM_DATA_ADDR@h /* OCM location */
908 ori r3,r3,CONFIG_SYS_OCM_DATA_ADDR@l
910 addis r4, 0, 0xC000 /* OCM data area enabled */
911 mtdcr OCM0_DSCNTL, r4
913 #endif /* CONFIG_405EZ */
916 /*----------------------------------------------------------------------- */
917 /* Setup temporary stack in DCACHE or OCM if needed for SDRAM SPD. */
918 /*----------------------------------------------------------------------- */
919 #ifdef CONFIG_SYS_INIT_DCACHE_CS
921 mtdcr EBC0_CFGADDR, r4
922 lis r4, CONFIG_SYS_INIT_DCACHE_PBxAR@h
923 ori r4, r4, CONFIG_SYS_INIT_DCACHE_PBxAR@l
924 mtdcr EBC0_CFGDATA, r4
927 mtdcr EBC0_CFGADDR, r4
928 lis r4, CONFIG_SYS_INIT_DCACHE_PBxCR@h
929 ori r4, r4, CONFIG_SYS_INIT_DCACHE_PBxCR@l
930 mtdcr EBC0_CFGDATA, r4
933 * Enable the data cache for the 128MB storage access control region
934 * at CONFIG_SYS_INIT_RAM_ADDR.
937 oris r4, r4, PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@h
938 ori r4, r4, PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@l
942 * Preallocate data cache lines to be used to avoid a subsequent
943 * cache miss and an ensuing machine check exception when exceptions
948 lis r3, CONFIG_SYS_INIT_RAM_ADDR@h
949 ori r3, r3, CONFIG_SYS_INIT_RAM_ADDR@l
951 lis r4, CONFIG_SYS_INIT_RAM_SIZE@h
952 ori r4, r4, CONFIG_SYS_INIT_RAM_SIZE@l
955 * Convert the size, in bytes, to the number of cache lines/blocks
958 clrlwi. r5, r4, (32 - L1_CACHE_SHIFT)
959 srwi r5, r4, L1_CACHE_SHIFT
965 /* Preallocate the computed number of cache blocks. */
966 ..alloc_dcache_block:
968 addi r3, r3, L1_CACHE_BYTES
969 bdnz ..alloc_dcache_block
973 * Load the initial stack pointer and data area and convert the size,
974 * in bytes, to the number of words to initialize to a known value.
976 lis r1, CONFIG_SYS_INIT_RAM_ADDR@h
977 ori r1, r1, CONFIG_SYS_INIT_SP_OFFSET@l
979 lis r4, (CONFIG_SYS_INIT_RAM_SIZE >> 2)@h
980 ori r4, r4, (CONFIG_SYS_INIT_RAM_SIZE >> 2)@l
983 lis r2, CONFIG_SYS_INIT_RAM_ADDR@h
984 ori r2, r2, CONFIG_SYS_INIT_RAM_SIZE@l
986 lis r4, CONFIG_SYS_INIT_RAM_PATTERN@h
987 ori r4, r4, CONFIG_SYS_INIT_RAM_PATTERN@l
994 * Make room for stack frame header and clear final stack frame so
995 * that stack backtraces terminate cleanly.
1001 * Set up a dummy frame to store reset vector as return address.
1002 * this causes stack underflow to reset board.
1004 stwu r1, -8(r1) /* Save back chain and move SP */
1005 addis r0, 0, RESET_VECTOR@h /* Address of reset vector */
1006 ori r0, r0, RESET_VECTOR@l
1007 stwu r1, -8(r1) /* Save back chain and move SP */
1008 stw r0, +12(r1) /* Save return addr (underflow vect) */
1010 #elif defined(CONFIG_SYS_TEMP_STACK_OCM) && \
1011 (defined(CONFIG_SYS_OCM_DATA_ADDR) && defined(CONFIG_SYS_OCM_DATA_SIZE))
1016 /* Set up Stack at top of OCM */
1017 lis r1, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET)@h
1018 ori r1, r1, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET)@l
1020 /* Set up a zeroized stack frame so that backtrace works right */
1026 * Set up a dummy frame to store reset vector as return address.
1027 * this causes stack underflow to reset board.
1029 stwu r1, -8(r1) /* Save back chain and move SP */
1030 lis r0, RESET_VECTOR@h /* Address of reset vector */
1031 ori r0, r0, RESET_VECTOR@l
1032 stwu r1, -8(r1) /* Save back chain and move SP */
1033 stw r0, +12(r1) /* Save return addr (underflow vect) */
1034 #endif /* CONFIG_SYS_INIT_DCACHE_CS */
1036 GET_GOT /* initialize GOT access */
1038 bl cpu_init_f /* run low-level CPU init code (from Flash) */
1039 #ifdef CONFIG_SYS_GENERIC_BOARD
1047 bl board_init_f /* run first part of init code (from Flash) */
1048 /* NOTREACHED - board_init_f() does not return */
1050 #endif /* CONFIG_405GP || CONFIG_405 || CONFIG_405EP */
1051 /*----------------------------------------------------------------------- */
1054 #if !defined(CONFIG_SPL_BUILD)
1056 * This code finishes saving the registers to the exception frame
1057 * and jumps to the appropriate handler for the exception.
1058 * Register r21 is pointer into trap frame, r1 has new stack pointer.
1060 .globl transfer_to_handler
1061 transfer_to_handler:
1071 andi. r24,r23,0x3f00 /* get vector offset */
1075 mtspr SPRG2,r22 /* r1 is now kernel sp */
1076 lwz r24,0(r23) /* virtual address of handler */
1077 lwz r23,4(r23) /* where to go when done */
1082 rfi /* jump to handler, enable MMU */
1085 mfmsr r28 /* Disable interrupts */
1089 SYNC /* Some chip revs need this... */
1104 lwz r2,_NIP(r1) /* Restore environment */
1115 mfmsr r28 /* Disable interrupts */
1119 SYNC /* Some chip revs need this... */
1134 lwz r2,_NIP(r1) /* Restore environment */
1146 mfmsr r28 /* Disable interrupts */
1150 SYNC /* Some chip revs need this... */
1165 lwz r2,_NIP(r1) /* Restore environment */
1167 mtspr SPRN_MCSRR0,r2
1168 mtspr SPRN_MCSRR1,r0
1174 #endif /* CONFIG_440 */
1182 /*------------------------------------------------------------------------------- */
1183 /* Function: out16 */
1184 /* Description: Output 16 bits */
1185 /*------------------------------------------------------------------------------- */
1191 /*------------------------------------------------------------------------------- */
1192 /* Function: out16r */
1193 /* Description: Byte reverse and output 16 bits */
1194 /*------------------------------------------------------------------------------- */
1200 /*------------------------------------------------------------------------------- */
1201 /* Function: out32r */
1202 /* Description: Byte reverse and output 32 bits */
1203 /*------------------------------------------------------------------------------- */
1209 /*------------------------------------------------------------------------------- */
1210 /* Function: in16 */
1211 /* Description: Input 16 bits */
1212 /*------------------------------------------------------------------------------- */
1218 /*------------------------------------------------------------------------------- */
1219 /* Function: in16r */
1220 /* Description: Input 16 bits and byte reverse */
1221 /*------------------------------------------------------------------------------- */
1227 /*------------------------------------------------------------------------------- */
1228 /* Function: in32r */
1229 /* Description: Input 32 bits and byte reverse */
1230 /*------------------------------------------------------------------------------- */
1236 #if !defined(CONFIG_SPL_BUILD)
1238 * void relocate_code (addr_sp, gd, addr_moni)
1240 * This "function" does not return, instead it continues in RAM
1241 * after relocating the monitor code.
1243 * r3 = Relocated stack pointer
1244 * r4 = Relocated global data pointer
1245 * r5 = Relocated text pointer
1247 .globl relocate_code
1249 #if defined(CONFIG_4xx_DCACHE) || defined(CONFIG_SYS_INIT_DCACHE_CS)
1251 * We need to flush the initial global data (gd_t) and bd_info
1252 * before the dcache will be invalidated.
1255 /* Save registers */
1261 * Flush complete dcache, this is faster than flushing the
1262 * ranges for global_data and bd_info instead.
1266 #if defined(CONFIG_SYS_INIT_DCACHE_CS)
1268 * Undo the earlier data cache set-up for the primordial stack and
1269 * data area. First, invalidate the data cache and then disable data
1270 * cacheability for that area. Finally, restore the EBC values, if
1274 /* Invalidate the primordial stack and data area in cache */
1275 lis r3, CONFIG_SYS_INIT_RAM_ADDR@h
1276 ori r3, r3, CONFIG_SYS_INIT_RAM_ADDR@l
1278 lis r4, CONFIG_SYS_INIT_RAM_SIZE@h
1279 ori r4, r4, CONFIG_SYS_INIT_RAM_SIZE@l
1282 bl invalidate_dcache_range
1284 /* Disable cacheability for the region */
1286 lis r4, ~PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@h
1287 ori r4, r4, ~PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@l
1291 /* Restore the EBC parameters */
1293 mtdcr EBC0_CFGADDR, r3
1295 ori r3, r3, PBxAP_VAL@l
1296 mtdcr EBC0_CFGDATA, r3
1299 mtdcr EBC0_CFGADDR, r3
1301 ori r3, r3, PBxCR_VAL@l
1302 mtdcr EBC0_CFGDATA, r3
1303 #endif /* defined(CONFIG_SYS_INIT_DCACHE_CS) */
1305 /* Restore registers */
1309 #endif /* defined(CONFIG_4xx_DCACHE) || defined(CONFIG_SYS_INIT_DCACHE_CS) */
1311 #ifdef CONFIG_SYS_INIT_RAM_DCACHE
1313 * Unlock the previously locked d-cache
1317 /* set TFLOOR/NFLOOR to 0 again */
1334 /* Invalidate data cache, now no longer our stack */
1338 #endif /* CONFIG_SYS_INIT_RAM_DCACHE */
1341 * On some 440er platforms the cache is enabled in the first TLB (Boot-CS)
1342 * to speed up the boot process. Now this cache needs to be disabled.
1344 #if defined(CONFIG_440)
1345 /* Clear all potential pending exceptions */
1348 addi r1,r0,CONFIG_SYS_TLB_FOR_BOOT_FLASH /* Use defined TLB */
1349 tlbre r0,r1,0x0002 /* Read contents */
1350 ori r0,r0,0x0c00 /* Or in the inhibit, write through bit */
1351 tlbwe r0,r1,0x0002 /* Save it out */
1354 #endif /* defined(CONFIG_440) */
1355 mr r1, r3 /* Set new stack pointer */
1356 mr r9, r4 /* Save copy of Init Data pointer */
1357 mr r10, r5 /* Save copy of Destination Address */
1360 mr r3, r5 /* Destination Address */
1361 lis r4, CONFIG_SYS_MONITOR_BASE@h /* Source Address */
1362 ori r4, r4, CONFIG_SYS_MONITOR_BASE@l
1363 lwz r5, GOT(__init_end)
1365 li r6, L1_CACHE_BYTES /* Cache Line Size */
1370 * New GOT-PTR = (old GOT-PTR - CONFIG_SYS_MONITOR_BASE) + Destination Address
1376 /* First our own GOT */
1378 /* then the one used by the C code */
1388 beq cr1,4f /* In place copy is not necessary */
1389 beq 7f /* Protect against 0 count */
1408 * Now flush the cache: note that we must start from a cache aligned
1409 * address. Otherwise we might miss one cache line.
1413 beq 7f /* Always flush prefetch queue in any case */
1421 sync /* Wait for all dcbst to complete on bus */
1427 7: sync /* Wait for all icbi to complete on bus */
1431 * We are done. Do not return, instead branch to second part of board
1432 * initialization, now running from RAM.
1435 addi r0, r10, in_ram - _start + _START_OFFSET
1437 blr /* NEVER RETURNS! */
1442 * Relocation Function, r12 point to got2+0x8000
1444 * Adjust got2 pointers, no need to check for 0, this code
1445 * already puts a few entries in the table.
1447 li r0,__got2_entries@sectoff@l
1448 la r3,GOT(_GOT2_TABLE_)
1449 lwz r11,GOT(_GOT2_TABLE_)
1461 * Now adjust the fixups and the pointers to the fixups
1462 * in case we need to move ourselves again.
1464 li r0,__fixup_entries@sectoff@l
1465 lwz r3,GOT(_FIXUP_TABLE_)
1481 * Now clear BSS segment
1483 lwz r3,GOT(__bss_start)
1484 lwz r4,GOT(__bss_end)
1506 mr r3, r9 /* Init Data pointer */
1507 mr r4, r10 /* Destination Address */
1511 * Copy exception vector code to low memory
1514 * r7: source address, r8: end address, r9: target address
1518 mflr r4 /* save link register */
1520 lwz r7, GOT(_start_of_vectors)
1521 lwz r8, GOT(_end_of_vectors)
1523 li r9, 0x100 /* reset vector always at 0x100 */
1526 bgelr /* return if r7>=r8 - just in case */
1536 * relocate `hdlr' and `int_return' entries
1538 li r7, .L_MachineCheck - _start + _START_OFFSET
1539 li r8, Alignment - _start + _START_OFFSET
1542 addi r7, r7, 0x100 /* next exception vector */
1546 li r7, .L_Alignment - _start + _START_OFFSET
1549 li r7, .L_ProgramCheck - _start + _START_OFFSET
1553 li r7, .L_FPUnavailable - _start + _START_OFFSET
1556 li r7, .L_Decrementer - _start + _START_OFFSET
1559 li r7, .L_APU - _start + _START_OFFSET
1562 li r7, .L_InstructionTLBError - _start + _START_OFFSET
1565 li r7, .L_DataTLBError - _start + _START_OFFSET
1567 #else /* CONFIG_440 */
1568 li r7, .L_PIT - _start + _START_OFFSET
1571 li r7, .L_InstructionTLBMiss - _start + _START_OFFSET
1574 li r7, .L_DataTLBMiss - _start + _START_OFFSET
1576 #endif /* CONFIG_440 */
1578 li r7, .L_DebugBreakpoint - _start + _START_OFFSET
1581 #if !defined(CONFIG_440)
1582 addi r7,r0,0x1000 /* set ME bit (Machine Exceptions) */
1583 oris r7,r7,0x0002 /* set CE bit (Critical Exceptions) */
1584 mtmsr r7 /* change MSR */
1587 b __440_msr_continue
1590 addi r7,r0,0x1000 /* set ME bit (Machine Exceptions) */
1591 oris r7,r7,0x0002 /* set CE bit (Critical Exceptions) */
1599 mtlr r4 /* restore link register */
1601 #endif /* CONFIG_SPL_BUILD */
1603 #if defined(CONFIG_440)
1604 /*----------------------------------------------------------------------------+
1606 +----------------------------------------------------------------------------*/
1607 function_prolog(dcbz_area)
1608 rlwinm. r5,r4,0,27,31
1609 rlwinm r5,r4,27,5,31
1618 function_epilog(dcbz_area)
1619 #endif /* CONFIG_440 */
1620 #endif /* CONFIG_SPL_BUILD */
1622 /*------------------------------------------------------------------------------- */
1624 /* Description: Input 8 bits */
1625 /*------------------------------------------------------------------------------- */
1631 /*------------------------------------------------------------------------------- */
1632 /* Function: out8 */
1633 /* Description: Output 8 bits */
1634 /*------------------------------------------------------------------------------- */
1640 /*------------------------------------------------------------------------------- */
1641 /* Function: out32 */
1642 /* Description: Output 32 bits */
1643 /*------------------------------------------------------------------------------- */
1649 /*------------------------------------------------------------------------------- */
1650 /* Function: in32 */
1651 /* Description: Input 32 bits */
1652 /*------------------------------------------------------------------------------- */
1658 /**************************************************************************/
1659 /* PPC405EP specific stuff */
1660 /**************************************************************************/
1664 #ifdef CONFIG_BUBINGA
1666 * Initialize EBC chip selects 1 & 4 and GPIO pins (for alternate
1667 * function) to support FPGA and NVRAM accesses below.
1670 lis r3,GPIO0_OSRH@h /* config GPIO output select */
1671 ori r3,r3,GPIO0_OSRH@l
1672 lis r4,CONFIG_SYS_GPIO0_OSRH@h
1673 ori r4,r4,CONFIG_SYS_GPIO0_OSRH@l
1676 ori r3,r3,GPIO0_OSRL@l
1677 lis r4,CONFIG_SYS_GPIO0_OSRL@h
1678 ori r4,r4,CONFIG_SYS_GPIO0_OSRL@l
1681 lis r3,GPIO0_ISR1H@h /* config GPIO input select */
1682 ori r3,r3,GPIO0_ISR1H@l
1683 lis r4,CONFIG_SYS_GPIO0_ISR1H@h
1684 ori r4,r4,CONFIG_SYS_GPIO0_ISR1H@l
1686 lis r3,GPIO0_ISR1L@h
1687 ori r3,r3,GPIO0_ISR1L@l
1688 lis r4,CONFIG_SYS_GPIO0_ISR1L@h
1689 ori r4,r4,CONFIG_SYS_GPIO0_ISR1L@l
1692 lis r3,GPIO0_TSRH@h /* config GPIO three-state select */
1693 ori r3,r3,GPIO0_TSRH@l
1694 lis r4,CONFIG_SYS_GPIO0_TSRH@h
1695 ori r4,r4,CONFIG_SYS_GPIO0_TSRH@l
1698 ori r3,r3,GPIO0_TSRL@l
1699 lis r4,CONFIG_SYS_GPIO0_TSRL@h
1700 ori r4,r4,CONFIG_SYS_GPIO0_TSRL@l
1703 lis r3,GPIO0_TCR@h /* config GPIO driver output enables */
1704 ori r3,r3,GPIO0_TCR@l
1705 lis r4,CONFIG_SYS_GPIO0_TCR@h
1706 ori r4,r4,CONFIG_SYS_GPIO0_TCR@l
1709 li r3,PB1AP /* program EBC bank 1 for RTC access */
1710 mtdcr EBC0_CFGADDR,r3
1711 lis r3,CONFIG_SYS_EBC_PB1AP@h
1712 ori r3,r3,CONFIG_SYS_EBC_PB1AP@l
1713 mtdcr EBC0_CFGDATA,r3
1715 mtdcr EBC0_CFGADDR,r3
1716 lis r3,CONFIG_SYS_EBC_PB1CR@h
1717 ori r3,r3,CONFIG_SYS_EBC_PB1CR@l
1718 mtdcr EBC0_CFGDATA,r3
1720 li r3,PB1AP /* program EBC bank 1 for RTC access */
1721 mtdcr EBC0_CFGADDR,r3
1722 lis r3,CONFIG_SYS_EBC_PB1AP@h
1723 ori r3,r3,CONFIG_SYS_EBC_PB1AP@l
1724 mtdcr EBC0_CFGDATA,r3
1726 mtdcr EBC0_CFGADDR,r3
1727 lis r3,CONFIG_SYS_EBC_PB1CR@h
1728 ori r3,r3,CONFIG_SYS_EBC_PB1CR@l
1729 mtdcr EBC0_CFGDATA,r3
1731 li r3,PB4AP /* program EBC bank 4 for FPGA access */
1732 mtdcr EBC0_CFGADDR,r3
1733 lis r3,CONFIG_SYS_EBC_PB4AP@h
1734 ori r3,r3,CONFIG_SYS_EBC_PB4AP@l
1735 mtdcr EBC0_CFGDATA,r3
1737 mtdcr EBC0_CFGADDR,r3
1738 lis r3,CONFIG_SYS_EBC_PB4CR@h
1739 ori r3,r3,CONFIG_SYS_EBC_PB4CR@l
1740 mtdcr EBC0_CFGDATA,r3
1744 !-----------------------------------------------------------------------
1745 ! Check to see if chip is in bypass mode.
1746 ! If so, write stored CPC0_PLLMR0 and CPC0_PLLMR1 values and perform a
1747 ! CPU reset Otherwise, skip this step and keep going.
1748 ! Note: Running BIOS in bypass mode is not supported since PLB speed
1749 ! will not be fast enough for the SDRAM (min 66MHz)
1750 !-----------------------------------------------------------------------
1752 mfdcr r5, CPC0_PLLMR1
1753 rlwinm r4,r5,1,0x1 /* get system clock source (SSCS) */
1756 beq pll_done /* if SSCS =b'1' then PLL has */
1757 /* already been set */
1758 /* and CPU has been reset */
1759 /* so skip to next section */
1761 #ifdef CONFIG_BUBINGA
1763 !-----------------------------------------------------------------------
1764 ! Read NVRAM to get value to write in PLLMR.
1765 ! If value has not been correctly saved, write default value
1766 ! Default config values (assuming on-board 33MHz SYS_CLK) are above.
1767 ! See CPU_DEFAULT_200 and CPU_DEFAULT_266 above.
1769 ! WARNING: This code assumes the first three words in the nvram_t
1770 ! structure in openbios.h. Changing the beginning of
1771 ! the structure will break this code.
1773 !-----------------------------------------------------------------------
1775 addis r3,0,NVRAM_BASE@h
1776 addi r3,r3,NVRAM_BASE@l
1779 addis r5,0,NVRVFY1@h
1780 addi r5,r5,NVRVFY1@l
1781 cmp cr0,0,r4,r5 /* Compare 1st NVRAM Magic number*/
1785 addis r5,0,NVRVFY2@h
1786 addi r5,r5,NVRVFY2@l
1787 cmp cr0,0,r4,r5 /* Compare 2 NVRAM Magic number */
1789 addi r3,r3,8 /* Skip over conf_size */
1790 lwz r4, 4(r3) /* Load PLLMR1 value from NVRAM */
1791 lwz r3, 0(r3) /* Load PLLMR0 value from NVRAM */
1792 rlwinm r5,r4,1,0x1 /* get system clock source (SSCS) */
1793 cmpi cr0,0,r5,1 /* See if PLL is locked */
1796 #endif /* CONFIG_BUBINGA */
1798 addis r3,0,PLLMR0_DEFAULT@h /* PLLMR0 default value */
1799 ori r3,r3,PLLMR0_DEFAULT@l /* */
1800 addis r4,0,PLLMR1_DEFAULT@h /* PLLMR1 default value */
1801 ori r4,r4,PLLMR1_DEFAULT@l /* */
1804 b pll_write /* Write the CPC0_PLLMR with new value */
1808 !-----------------------------------------------------------------------
1809 ! Clear Soft Reset Register
1810 ! This is needed to enable PCI if not booting from serial EPROM
1811 !-----------------------------------------------------------------------
1821 blr /* return to main code */
1824 !-----------------------------------------------------------------------------
1825 ! Function: pll_write
1826 ! Description: Updates the value of the CPC0_PLLMR according to CMOS27E documentation
1828 ! 1. Pll is first disabled (de-activated by putting in bypass mode)
1830 ! 3. Clock dividers are set while PLL is held in reset and bypassed
1831 ! 4. PLL Reset is cleared
1832 ! 5. Wait 100us for PLL to lock
1833 ! 6. A core reset is performed
1834 ! Input: r3 = Value to write to CPC0_PLLMR0
1835 ! Input: r4 = Value to write to CPC0_PLLMR1
1837 !-----------------------------------------------------------------------------
1843 ori r5,r5,0x0101 /* Stop the UART clocks */
1844 mtdcr CPC0_UCR,r5 /* Before changing PLL */
1846 mfdcr r5, CPC0_PLLMR1
1847 rlwinm r5,r5,0,0x7FFFFFFF /* Disable PLL */
1848 mtdcr CPC0_PLLMR1,r5
1849 oris r5,r5,0x4000 /* Set PLL Reset */
1850 mtdcr CPC0_PLLMR1,r5
1852 mtdcr CPC0_PLLMR0,r3 /* Set clock dividers */
1853 rlwinm r5,r4,0,0x3FFFFFFF /* Reset & Bypass new PLL dividers */
1854 oris r5,r5,0x4000 /* Set PLL Reset */
1855 mtdcr CPC0_PLLMR1,r5 /* Set clock dividers */
1856 rlwinm r5,r5,0,0xBFFFFFFF /* Clear PLL Reset */
1857 mtdcr CPC0_PLLMR1,r5
1860 ! Wait min of 100us for PLL to lock.
1861 ! See CMOS 27E databook for more info.
1862 ! At 200MHz, that means waiting 20,000 instructions
1864 addi r3,0,20000 /* 2000 = 0x4e20 */
1869 oris r5,r5,0x8000 /* Enable PLL */
1870 mtdcr CPC0_PLLMR1,r5 /* Engage */
1873 * Reset CPU to guarantee timings are OK
1874 * Not sure if this is needed...
1877 mtspr SPRN_DBCR0,r3 /* This will cause a CPU core reset, and */
1878 /* execution will continue from the poweron */
1879 /* vector of 0xfffffffc */
1880 #endif /* CONFIG_405EP */
1882 #if defined(CONFIG_440)
1883 /*----------------------------------------------------------------------------+
1885 +----------------------------------------------------------------------------*/
1886 function_prolog(mttlb3)
1889 function_epilog(mttlb3)
1891 /*----------------------------------------------------------------------------+
1893 +----------------------------------------------------------------------------*/
1894 function_prolog(mftlb3)
1897 function_epilog(mftlb3)
1899 /*----------------------------------------------------------------------------+
1901 +----------------------------------------------------------------------------*/
1902 function_prolog(mttlb2)
1905 function_epilog(mttlb2)
1907 /*----------------------------------------------------------------------------+
1909 +----------------------------------------------------------------------------*/
1910 function_prolog(mftlb2)
1913 function_epilog(mftlb2)
1915 /*----------------------------------------------------------------------------+
1917 +----------------------------------------------------------------------------*/
1918 function_prolog(mttlb1)
1921 function_epilog(mttlb1)
1923 /*----------------------------------------------------------------------------+
1925 +----------------------------------------------------------------------------*/
1926 function_prolog(mftlb1)
1929 function_epilog(mftlb1)
1930 #endif /* CONFIG_440 */