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
7 * See file CREDITS for list of people who contributed to this
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25 /*------------------------------------------------------------------------------+
27 * This source code has been made available to you by IBM on an AS-IS
28 * basis. Anyone receiving this source is licensed under IBM
29 * copyrights to use it in any way he or she deems fit, including
30 * copying it, modifying it, compiling it, and redistributing it either
31 * with or without modifications. No license under IBM patents or
32 * patent applications is to be implied by the copyright license.
34 * Any user of this software should understand that IBM cannot provide
35 * technical support for this software and will not be responsible for
36 * any consequences resulting from the use of this software.
38 * Any person who transfers this source code or any derivative work
39 * must include the IBM copyright notice, this paragraph, and the
40 * preceding two paragraphs in the transferred software.
42 * COPYRIGHT I B M CORPORATION 1995
43 * LICENSED MATERIAL - PROGRAM PROPERTY OF I B M
44 *-------------------------------------------------------------------------------
47 /* U-Boot - Startup Code for AMCC 4xx PowerPC based Embedded Boards
50 * The processor starts at 0xfffffffc and the code is executed
52 * in memory, but as long we don't jump around before relocating.
53 * board_init lies at a quite high address and when the cpu has
54 * jumped there, everything is ok.
55 * This works because the cpu gives the FLASH (CS0) the whole
56 * address space at startup, and board_init lies as a echo of
57 * the flash somewhere up there in the memorymap.
59 * board_init will change CS0 to be positioned at the correct
60 * address and (s)dram will be positioned at address 0
66 #define _LINUX_CONFIG_H 1 /* avoid reading Linux autoconf.h file */
68 #include <ppc_asm.tmpl>
71 #include <asm/cache.h>
74 #ifndef CONFIG_IDENT_STRING
75 #define CONFIG_IDENT_STRING ""
78 #ifdef CFG_INIT_DCACHE_CS
79 # if (CFG_INIT_DCACHE_CS == 0)
83 # if (CFG_INIT_DCACHE_CS == 1)
87 # if (CFG_INIT_DCACHE_CS == 2)
91 # if (CFG_INIT_DCACHE_CS == 3)
95 # if (CFG_INIT_DCACHE_CS == 4)
99 # if (CFG_INIT_DCACHE_CS == 5)
103 # if (CFG_INIT_DCACHE_CS == 6)
107 # if (CFG_INIT_DCACHE_CS == 7)
111 #endif /* CFG_INIT_DCACHE_CS */
113 #if (defined(CFG_INIT_RAM_DCACHE) && (CFG_INIT_RAM_END > (4 << 10)))
114 #error Only 4k of init-ram is supported - please adjust CFG_INIT_RAM_END!
117 #define function_prolog(func_name) .text; \
121 #define function_epilog(func_name) .type func_name,@function; \
122 .size func_name,.-func_name
124 /* We don't want the MMU yet.
127 #define MSR_KERNEL ( MSR_ME ) /* Machine Check */
130 .extern ext_bus_cntlr_init
132 #ifdef CONFIG_NAND_U_BOOT
133 .extern reconfig_tlb0
137 * Set up GOT: Global Offset Table
139 * Use r14 to access the GOT
141 #if !defined(CONFIG_NAND_SPL)
143 GOT_ENTRY(_GOT2_TABLE_)
144 GOT_ENTRY(_FIXUP_TABLE_)
147 GOT_ENTRY(_start_of_vectors)
148 GOT_ENTRY(_end_of_vectors)
149 GOT_ENTRY(transfer_to_handler)
151 GOT_ENTRY(__init_end)
153 GOT_ENTRY(__bss_start)
155 #endif /* CONFIG_NAND_SPL */
157 #if defined(CONFIG_NAND_U_BOOT) && !defined(CONFIG_NAND_SPL)
159 * NAND U-Boot image is started from offset 0
162 #if defined(CONFIG_440)
166 bl cpu_init_f /* run low-level CPU init code (from Flash) */
171 * 440 Startup -- on reset only the top 4k of the effective
172 * address space is mapped in by an entry in the instruction
173 * and data shadow TLB. The .bootpg section is located in the
174 * top 4k & does only what's necessary to map in the the rest
175 * of the boot rom. Once the boot rom is mapped in we can
176 * proceed with normal startup.
178 * NOTE: CS0 only covers the top 2MB of the effective address
182 #if defined(CONFIG_440)
183 #if !defined(CONFIG_NAND_SPL)
184 .section .bootpg,"ax"
188 /**************************************************************************/
190 /*--------------------------------------------------------------------+
191 | 440EPX BUP Change - Hardware team request
192 +--------------------------------------------------------------------*/
193 #if defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
198 /*----------------------------------------------------------------+
199 | Core bug fix. Clear the esr
200 +-----------------------------------------------------------------*/
203 /*----------------------------------------------------------------*/
204 /* Clear and set up some registers. */
205 /*----------------------------------------------------------------*/
206 iccci r0,r0 /* NOTE: operands not used for 440 */
207 dccci r0,r0 /* NOTE: operands not used for 440 */
214 /* NOTE: 440GX adds machine check status regs */
215 #if defined(CONFIG_440) && !defined(CONFIG_440GP)
222 /*----------------------------------------------------------------*/
224 /*----------------------------------------------------------------*/
225 /* Disable store gathering & broadcast, guarantee inst/data
226 * cache block touch, force load/store alignment
227 * (see errata 1.12: 440_33)
229 lis r1,0x0030 /* store gathering & broadcast disable */
230 ori r1,r1,0x6000 /* cache touch */
233 /*----------------------------------------------------------------*/
234 /* Initialize debug */
235 /*----------------------------------------------------------------*/
237 andis. r1, r1, 0x8000 /* test DBCR0[EDM] bit */
238 bne skip_debug_init /* if set, don't clear debug register */
251 mtspr dbsr,r1 /* Clear all valid bits */
254 #if defined (CONFIG_440SPE)
255 /*----------------------------------------------------------------+
256 | Initialize Core Configuration Reg1.
257 | a. ICDPEI: Record even parity. Normal operation.
258 | b. ICTPEI: Record even parity. Normal operation.
259 | c. DCTPEI: Record even parity. Normal operation.
260 | d. DCDPEI: Record even parity. Normal operation.
261 | e. DCUPEI: Record even parity. Normal operation.
262 | f. DCMPEI: Record even parity. Normal operation.
263 | g. FCOM: Normal operation
264 | h. MMUPEI: Record even parity. Normal operation.
265 | i. FFF: Flush only as much data as necessary.
266 | j. TCS: Timebase increments from CPU clock.
267 +-----------------------------------------------------------------*/
271 /*----------------------------------------------------------------+
272 | Reset the timebase.
273 | The previous write to CCR1 sets the timebase source.
274 +-----------------------------------------------------------------*/
279 /*----------------------------------------------------------------*/
280 /* Setup interrupt vectors */
281 /*----------------------------------------------------------------*/
282 mtspr ivpr,r0 /* Vectors start at 0x0000_0000 */
284 mtspr ivor0,r1 /* Critical input */
286 mtspr ivor1,r1 /* Machine check */
288 mtspr ivor2,r1 /* Data storage */
290 mtspr ivor3,r1 /* Instruction storage */
292 mtspr ivor4,r1 /* External interrupt */
294 mtspr ivor5,r1 /* Alignment */
296 mtspr ivor6,r1 /* Program check */
298 mtspr ivor7,r1 /* Floating point unavailable */
300 mtspr ivor8,r1 /* System call */
302 mtspr ivor9,r1 /* Auxiliary Processor unavailable */
304 mtspr ivor10,r1 /* Decrementer */
306 mtspr ivor13,r1 /* Data TLB error */
308 mtspr ivor14,r1 /* Instr TLB error */
310 mtspr ivor15,r1 /* Debug */
312 /*----------------------------------------------------------------*/
313 /* Configure cache regions */
314 /*----------------------------------------------------------------*/
332 /*----------------------------------------------------------------*/
333 /* Cache victim limits */
334 /*----------------------------------------------------------------*/
335 /* floors 0, ceiling max to use the entire cache -- nothing locked
342 /*----------------------------------------------------------------+
343 |Initialize MMUCR[STID] = 0.
344 +-----------------------------------------------------------------*/
351 /*----------------------------------------------------------------*/
352 /* Clear all TLB entries -- TID = 0, TS = 0 */
353 /*----------------------------------------------------------------*/
355 li r1,0x003f /* 64 TLB entries */
357 rsttlb: tlbwe r0,r1,0x0000 /* Invalidate all entries (V=0)*/
363 /*----------------------------------------------------------------*/
364 /* TLB entry setup -- step thru tlbtab */
365 /*----------------------------------------------------------------*/
366 #if defined(CONFIG_440SPE)
367 /*----------------------------------------------------------------*/
368 /* We have different TLB tables for revA and rev B of 440SPe */
369 /*----------------------------------------------------------------*/
381 bl tlbtab /* Get tlbtab pointer */
384 li r1,0x003f /* 64 TLB entries max */
391 beq 2f /* 0 marks end */
394 tlbwe r0,r4,0 /* TLB Word 0 */
395 tlbwe r1,r4,1 /* TLB Word 1 */
396 tlbwe r2,r4,2 /* TLB Word 2 */
397 addi r4,r4,1 /* Next TLB */
400 /*----------------------------------------------------------------*/
401 /* Continue from 'normal' start */
402 /*----------------------------------------------------------------*/
405 #if defined(CONFIG_NAND_SPL)
406 #if defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
408 * Enable internal SRAM (only on 440EPx/GRx, 440EP/GR have no OCM)
413 and r1,r1,r2 /* Disable parity check */
416 and r1,r1,r2 /* Disable pwr mgmt */
419 #if defined(CONFIG_440EP)
421 * On 440EP with no internal SRAM, we setup SDRAM very early
422 * and copy the NAND_SPL to SDRAM and jump to it
424 /* Clear Dcache to use as RAM */
425 addis r3,r0,CFG_INIT_RAM_ADDR@h
426 ori r3,r3,CFG_INIT_RAM_ADDR@l
427 addis r4,r0,CFG_INIT_RAM_END@h
428 ori r4,r4,CFG_INIT_RAM_END@l
429 rlwinm. r5,r4,0,27,31
439 /*----------------------------------------------------------------*/
440 /* Setup the stack in internal SRAM */
441 /*----------------------------------------------------------------*/
442 lis r1,CFG_INIT_RAM_ADDR@h
443 ori r1,r1,CFG_INIT_SP_OFFSET@l
446 stwu r0,-4(r1) /* Terminate call chain */
448 stwu r1,-8(r1) /* Save back chain and move SP */
449 lis r0,RESET_VECTOR@h /* Address of reset vector */
450 ori r0,r0, RESET_VECTOR@l
451 stwu r1,-8(r1) /* Save back chain and move SP */
452 stw r0,+12(r1) /* Save return addr (underflow vect) */
456 #endif /* CONFIG_440EP */
459 * Copy SPL from cache into internal SRAM
461 li r4,(CFG_NAND_BOOT_SPL_SIZE >> 2) - 1
463 lis r2,CFG_NAND_BOOT_SPL_SRC@h
464 ori r2,r2,CFG_NAND_BOOT_SPL_SRC@l
465 lis r3,CFG_NAND_BOOT_SPL_DST@h
466 ori r3,r3,CFG_NAND_BOOT_SPL_DST@l
473 * Jump to code in RAM
477 lis r3,(CFG_NAND_BOOT_SPL_SRC - CFG_NAND_BOOT_SPL_DST)@h
478 ori r3,r3,(CFG_NAND_BOOT_SPL_SRC - CFG_NAND_BOOT_SPL_DST)@l
487 #endif /* CONFIG_NAND_SPL */
493 mtspr srr1,r0 /* Keep things disabled for now */
497 #endif /* CONFIG_440 */
500 * r3 - 1st arg to board_init(): IMMP pointer
501 * r4 - 2nd arg to board_init(): boot flag
503 #ifndef CONFIG_NAND_SPL
505 .long 0x27051956 /* U-Boot Magic Number */
506 .globl version_string
508 .ascii U_BOOT_VERSION
509 .ascii " (", __DATE__, " - ", __TIME__, ")"
510 .ascii CONFIG_IDENT_STRING, "\0"
512 . = EXC_OFF_SYS_RESET
513 .globl _start_of_vectors
516 /* Critical input. */
517 CRIT_EXCEPTION(0x100, CritcalInput, UnknownException)
521 MCK_EXCEPTION(0x200, MachineCheck, MachineCheckException)
523 CRIT_EXCEPTION(0x200, MachineCheck, MachineCheckException)
524 #endif /* CONFIG_440 */
526 /* Data Storage exception. */
527 STD_EXCEPTION(0x300, DataStorage, UnknownException)
529 /* Instruction Storage exception. */
530 STD_EXCEPTION(0x400, InstStorage, UnknownException)
532 /* External Interrupt exception. */
533 STD_EXCEPTION(0x500, ExtInterrupt, external_interrupt)
535 /* Alignment exception. */
538 EXCEPTION_PROLOG(SRR0, SRR1)
543 addi r3,r1,STACK_FRAME_OVERHEAD
545 rlwimi r20,r23,0,16,16 /* copy EE bit from saved MSR */
546 lwz r6,GOT(transfer_to_handler)
550 .long AlignmentException - _start + _START_OFFSET
551 .long int_return - _start + _START_OFFSET
553 /* Program check exception */
556 EXCEPTION_PROLOG(SRR0, SRR1)
557 addi r3,r1,STACK_FRAME_OVERHEAD
559 rlwimi r20,r23,0,16,16 /* copy EE bit from saved MSR */
560 lwz r6,GOT(transfer_to_handler)
564 .long ProgramCheckException - _start + _START_OFFSET
565 .long int_return - _start + _START_OFFSET
568 STD_EXCEPTION(0x800, FPUnavailable, UnknownException)
569 STD_EXCEPTION(0x900, Decrementer, DecrementerPITException)
570 STD_EXCEPTION(0xa00, APU, UnknownException)
572 STD_EXCEPTION(0xc00, SystemCall, UnknownException)
575 STD_EXCEPTION(0x1300, DataTLBError, UnknownException)
576 STD_EXCEPTION(0x1400, InstructionTLBError, UnknownException)
578 STD_EXCEPTION(0x1000, PIT, DecrementerPITException)
579 STD_EXCEPTION(0x1100, InstructionTLBMiss, UnknownException)
580 STD_EXCEPTION(0x1200, DataTLBMiss, UnknownException)
582 CRIT_EXCEPTION(0x2000, DebugBreakpoint, DebugException )
584 .globl _end_of_vectors
591 /*****************************************************************************/
592 #if defined(CONFIG_440)
594 /*----------------------------------------------------------------*/
595 /* Clear and set up some registers. */
596 /*----------------------------------------------------------------*/
599 mtspr dec,r0 /* prevent dec exceptions */
600 mtspr tbl,r0 /* prevent fit & wdt exceptions */
602 mtspr tsr,r1 /* clear all timer exception status */
603 mtspr tcr,r0 /* disable all */
604 mtspr esr,r0 /* clear exception syndrome register */
605 mtxer r0 /* clear integer exception register */
607 /*----------------------------------------------------------------*/
608 /* Debug setup -- some (not very good) ice's need an event*/
609 /* to establish control :-( Define CFG_INIT_DBCR to the dbsr */
610 /* value you need in this case 0x8cff 0000 should do the trick */
611 /*----------------------------------------------------------------*/
612 #if defined(CFG_INIT_DBCR)
615 mtspr dbsr,r1 /* Clear all status bits */
616 lis r0,CFG_INIT_DBCR@h
617 ori r0,r0,CFG_INIT_DBCR@l
622 /*----------------------------------------------------------------*/
623 /* Setup the internal SRAM */
624 /*----------------------------------------------------------------*/
627 #ifdef CFG_INIT_RAM_DCACHE
628 /* Clear Dcache to use as RAM */
629 addis r3,r0,CFG_INIT_RAM_ADDR@h
630 ori r3,r3,CFG_INIT_RAM_ADDR@l
631 addis r4,r0,CFG_INIT_RAM_END@h
632 ori r4,r4,CFG_INIT_RAM_END@l
633 rlwinm. r5,r4,0,27,31
645 * Lock the init-ram/stack in d-cache, so that other regions
646 * may use d-cache as well
647 * Note, that this current implementation locks exactly 4k
648 * of d-cache, so please make sure that you don't define a
649 * bigger init-ram area. Take a look at the lwmon5 440EPx
650 * implementation as a reference.
654 /* 8. set TFLOOR/NFLOOR to 8 (-> 8*16*32 bytes locked -> 4k) */
670 #endif /* CFG_INIT_RAM_DCACHE */
672 /* 440EP & 440GR are only 440er PPC's without internal SRAM */
673 #if !defined(CONFIG_440EP) && !defined(CONFIG_440GR)
674 /* not all PPC's have internal SRAM usable as L2-cache */
675 #if defined(CONFIG_440GX) || defined(CONFIG_440SP) || defined(CONFIG_440SPE)
676 mtdcr l2_cache_cfg,r0 /* Ensure L2 Cache is off */
682 and r1,r1,r2 /* Disable parity check */
685 and r1,r1,r2 /* Disable pwr mgmt */
688 lis r1,0x8000 /* BAS = 8000_0000 */
689 #if defined(CONFIG_440GX) || defined(CONFIG_440SP)
690 ori r1,r1,0x0980 /* first 64k */
691 mtdcr isram0_sb0cr,r1
693 ori r1,r1,0x0980 /* second 64k */
694 mtdcr isram0_sb1cr,r1
696 ori r1,r1, 0x0980 /* third 64k */
697 mtdcr isram0_sb2cr,r1
699 ori r1,r1, 0x0980 /* fourth 64k */
700 mtdcr isram0_sb3cr,r1
701 #elif defined(CONFIG_440SPE)
702 lis r1,0x0000 /* BAS = 0000_0000 */
703 ori r1,r1,0x0984 /* first 64k */
704 mtdcr isram0_sb0cr,r1
706 ori r1,r1,0x0984 /* second 64k */
707 mtdcr isram0_sb1cr,r1
709 ori r1,r1, 0x0984 /* third 64k */
710 mtdcr isram0_sb2cr,r1
712 ori r1,r1, 0x0984 /* fourth 64k */
713 mtdcr isram0_sb3cr,r1
714 #elif defined(CONFIG_440GP)
715 ori r1,r1,0x0380 /* 8k rw */
716 mtdcr isram0_sb0cr,r1
717 mtdcr isram0_sb1cr,r0 /* Disable bank 1 */
719 #endif /* #if !defined(CONFIG_440EP) && !defined(CONFIG_440GR) */
721 /*----------------------------------------------------------------*/
722 /* Setup the stack in internal SRAM */
723 /*----------------------------------------------------------------*/
724 lis r1,CFG_INIT_RAM_ADDR@h
725 ori r1,r1,CFG_INIT_SP_OFFSET@l
728 stwu r0,-4(r1) /* Terminate call chain */
730 stwu r1,-8(r1) /* Save back chain and move SP */
731 lis r0,RESET_VECTOR@h /* Address of reset vector */
732 ori r0,r0, RESET_VECTOR@l
733 stwu r1,-8(r1) /* Save back chain and move SP */
734 stw r0,+12(r1) /* Save return addr (underflow vect) */
736 #ifdef CONFIG_NAND_SPL
737 bl nand_boot /* will not return */
741 bl cpu_init_f /* run low-level CPU init code (from Flash) */
745 #endif /* CONFIG_440 */
747 /*****************************************************************************/
749 /*----------------------------------------------------------------------- */
750 /* Set up some machine state registers. */
751 /*----------------------------------------------------------------------- */
752 addi r0,r0,0x0000 /* initialize r0 to zero */
753 mtspr esr,r0 /* clear Exception Syndrome Reg */
754 mttcr r0 /* timer control register */
755 mtexier r0 /* disable all interrupts */
756 addis r4,r0,0xFFFF /* set r4 to 0xFFFFFFFF (status in the */
757 ori r4,r4,0xFFFF /* dbsr is cleared by setting bits to 1) */
758 mtdbsr r4 /* clear/reset the dbsr */
759 mtexisr r4 /* clear all pending interrupts */
761 mtexier r4 /* enable critical exceptions */
762 addis r4,r0,0x0000 /* assume 403GCX - enable core clk */
763 ori r4,r4,0x4020 /* dbling (no harm done on GA and GC */
764 mtiocr r4 /* since bit not used) & DRC to latch */
765 /* data bus on rising edge of CAS */
766 /*----------------------------------------------------------------------- */
768 /*----------------------------------------------------------------------- */
770 /*----------------------------------------------------------------------- */
771 /* Invalidate i-cache and d-cache TAG arrays. */
772 /*----------------------------------------------------------------------- */
773 addi r3,0,1024 /* 1/4 of I-cache size, half of D-cache */
774 addi r4,0,1024 /* 1/4 of I-cache */
779 addic. r3,r3,-16 /* move back one cache line */
780 bne ..cloop /* loop back to do rest until r3 = 0 */
783 /* initialize IOP480 so it can read 1 MB code area for SRAM spaces */
784 /* this requires enabling MA[17..0], by default only MA[12..0] are enabled. */
787 /* first copy IOP480 register base address into r3 */
788 addis r3,0,0x5000 /* IOP480 register base address hi */
789 /* ori r3,r3,0x0000 / IOP480 register base address lo */
792 /* use r4 as the working variable */
793 /* turn on CS3 (LOCCTL.7) */
794 lwz r4,0x84(r3) /* LOCTL is at offset 0x84 */
795 andi. r4,r4,0xff7f /* make bit 7 = 0 -- CS3 mode */
796 stw r4,0x84(r3) /* LOCTL is at offset 0x84 */
799 #ifdef CONFIG_DASA_SIM
800 /* use r4 as the working variable */
801 /* turn on MA17 (LOCCTL.7) */
802 lwz r4,0x84(r3) /* LOCTL is at offset 0x84 */
803 ori r4,r4,0x80 /* make bit 7 = 1 -- MA17 mode */
804 stw r4,0x84(r3) /* LOCTL is at offset 0x84 */
807 /* turn on MA16..13 (LCS0BRD.12 = 0) */
808 lwz r4,0x100(r3) /* LCS0BRD is at offset 0x100 */
809 andi. r4,r4,0xefff /* make bit 12 = 0 */
810 stw r4,0x100(r3) /* LCS0BRD is at offset 0x100 */
812 /* make sure above stores all comlete before going on */
815 /* last thing, set local init status done bit (DEVINIT.31) */
816 lwz r4,0x80(r3) /* DEVINIT is at offset 0x80 */
817 oris r4,r4,0x8000 /* make bit 31 = 1 */
818 stw r4,0x80(r3) /* DEVINIT is at offset 0x80 */
820 /* clear all pending interrupts and disable all interrupts */
821 li r4,-1 /* set p1 to 0xffffffff */
822 stw r4,0x1b0(r3) /* clear all pending interrupts */
823 stw r4,0x1b8(r3) /* clear all pending interrupts */
824 li r4,0 /* set r4 to 0 */
825 stw r4,0x1b4(r3) /* disable all interrupts */
826 stw r4,0x1bc(r3) /* disable all interrupts */
828 /* make sure above stores all comlete before going on */
831 /*----------------------------------------------------------------------- */
832 /* Enable two 128MB cachable regions. */
833 /*----------------------------------------------------------------------- */
836 mticcr r1 /* instruction cache */
840 mtdccr r1 /* data cache */
842 addis r1,r0,CFG_INIT_RAM_ADDR@h
843 ori r1,r1,CFG_INIT_SP_OFFSET /* set up the stack to SDRAM */
844 li r0, 0 /* Make room for stack frame header and */
845 stwu r0, -4(r1) /* clear final stack frame so that */
846 stwu r0, -4(r1) /* stack backtraces terminate cleanly */
848 GET_GOT /* initialize GOT access */
850 bl board_init_f /* run first part of init code (from Flash) */
852 #endif /* CONFIG_IOP480 */
854 /*****************************************************************************/
855 #if defined(CONFIG_405GP) || defined(CONFIG_405CR) || \
856 defined(CONFIG_405EP) || defined(CONFIG_405EZ) || \
857 defined(CONFIG_405EX) || defined(CONFIG_405)
858 /*----------------------------------------------------------------------- */
859 /* Clear and set up some registers. */
860 /*----------------------------------------------------------------------- */
862 #if !defined(CONFIG_405EX)
866 * On 405EX, completely clearing the SGR leads to PPC hangup
867 * upon PCIe configuration access. The PCIe memory regions
868 * need to be guarded!
875 mtesr r4 /* clear Exception Syndrome Reg */
876 mttcr r4 /* clear Timer Control Reg */
877 mtxer r4 /* clear Fixed-Point Exception Reg */
878 mtevpr r4 /* clear Exception Vector Prefix Reg */
879 addi r4,r0,(0xFFFF-0x10000) /* set r4 to 0xFFFFFFFF (status in the */
880 /* dbsr is cleared by setting bits to 1) */
881 mtdbsr r4 /* clear/reset the dbsr */
883 /*----------------------------------------------------------------------- */
884 /* Invalidate I and D caches. Enable I cache for defined memory regions */
885 /* to speed things up. Leave the D cache disabled for now. It will be */
886 /* enabled/left disabled later based on user selected menu options. */
887 /* Be aware that the I cache may be disabled later based on the menu */
888 /* options as well. See miscLib/main.c. */
889 /*----------------------------------------------------------------------- */
893 /*----------------------------------------------------------------------- */
894 /* Enable two 128MB cachable regions. */
895 /*----------------------------------------------------------------------- */
898 mticcr r4 /* instruction cache */
903 mtdccr r4 /* data cache */
905 #if !(defined(CFG_EBC_PB0AP) && defined(CFG_EBC_PB0CR)) || defined(CONFIG_405EX)
906 /*----------------------------------------------------------------------- */
907 /* Tune the speed and size for flash CS0 */
908 /*----------------------------------------------------------------------- */
909 bl ext_bus_cntlr_init
911 #if !(defined(CFG_INIT_DCACHE_CS) || defined(CFG_TEMP_STACK_OCM))
913 * Boards like the Kilauea (405EX) don't have OCM and can't use
914 * DCache for init-ram. So setup stack here directly after the
915 * SDRAM is initialized.
917 lis r1, CFG_INIT_RAM_ADDR@h
918 ori r1,r1,CFG_INIT_SP_OFFSET /* set up the stack in SDRAM */
920 li r0, 0 /* Make room for stack frame header and */
921 stwu r0, -4(r1) /* clear final stack frame so that */
922 stwu r0, -4(r1) /* stack backtraces terminate cleanly */
924 * Set up a dummy frame to store reset vector as return address.
925 * this causes stack underflow to reset board.
927 stwu r1, -8(r1) /* Save back chain and move SP */
928 lis r0, RESET_VECTOR@h /* Address of reset vector */
929 ori r0, r0, RESET_VECTOR@l
930 stwu r1, -8(r1) /* Save back chain and move SP */
931 stw r0, +12(r1) /* Save return addr (underflow vect) */
932 #endif /* !(CFG_INIT_DCACHE_CS || !CFG_TEM_STACK_OCM) */
934 #if defined(CONFIG_405EP)
935 /*----------------------------------------------------------------------- */
936 /* DMA Status, clear to come up clean */
937 /*----------------------------------------------------------------------- */
938 addis r3,r0, 0xFFFF /* Clear all existing DMA status */
942 bl ppc405ep_init /* do ppc405ep specific init */
943 #endif /* CONFIG_405EP */
945 #if defined(CFG_OCM_DATA_ADDR) && defined(CFG_OCM_DATA_SIZE)
946 #if defined(CONFIG_405EZ)
947 /********************************************************************
948 * Setup OCM - On Chip Memory - PPC405EZ uses OCM Controller V2
949 *******************************************************************/
951 * We can map the OCM on the PLB3, so map it at
952 * CFG_OCM_DATA_ADDR + 0x8000
954 lis r3,CFG_OCM_DATA_ADDR@h /* OCM location */
955 ori r3,r3,CFG_OCM_DATA_ADDR@l
956 ori r3,r3,0x0270 /* 16K for Bank 1, R/W/Enable */
957 mtdcr ocmplb3cr1,r3 /* Set PLB Access */
958 ori r3,r3,0x4000 /* Add 0x4000 for bank 2 */
959 mtdcr ocmplb3cr2,r3 /* Set PLB Access */
962 lis r3,CFG_OCM_DATA_ADDR@h /* OCM location */
963 ori r3,r3,CFG_OCM_DATA_ADDR@l
964 ori r3,r3,0x0270 /* 16K for Bank 1, R/W/Enable */
965 mtdcr ocmdscr1, r3 /* Set Data Side */
966 mtdcr ocmiscr1, r3 /* Set Instruction Side */
967 ori r3,r3,0x4000 /* Add 0x4000 for bank 2 */
968 mtdcr ocmdscr2, r3 /* Set Data Side */
969 mtdcr ocmiscr2, r3 /* Set Instruction Side */
970 addis r3,0,0x0800 /* OCM Data Parity Disable - 1 Wait State */
974 #else /* CONFIG_405EZ */
975 /********************************************************************
976 * Setup OCM - On Chip Memory
977 *******************************************************************/
981 mfdcr r3, ocmiscntl /* get instr-side IRAM config */
982 mfdcr r4, ocmdscntl /* get data-side IRAM config */
983 and r3, r3, r0 /* disable data-side IRAM */
984 and r4, r4, r0 /* disable data-side IRAM */
985 mtdcr ocmiscntl, r3 /* set instr-side IRAM config */
986 mtdcr ocmdscntl, r4 /* set data-side IRAM config */
989 lis r3,CFG_OCM_DATA_ADDR@h /* OCM location */
990 ori r3,r3,CFG_OCM_DATA_ADDR@l
992 addis r4, 0, 0xC000 /* OCM data area enabled */
995 #endif /* CONFIG_405EZ */
998 #ifdef CONFIG_NAND_SPL
1000 * Copy SPL from cache into internal SRAM
1002 li r4,(CFG_NAND_BOOT_SPL_SIZE >> 2) - 1
1004 lis r2,CFG_NAND_BOOT_SPL_SRC@h
1005 ori r2,r2,CFG_NAND_BOOT_SPL_SRC@l
1006 lis r3,CFG_NAND_BOOT_SPL_DST@h
1007 ori r3,r3,CFG_NAND_BOOT_SPL_DST@l
1014 * Jump to code in RAM
1018 lis r3,(CFG_NAND_BOOT_SPL_SRC - CFG_NAND_BOOT_SPL_DST)@h
1019 ori r3,r3,(CFG_NAND_BOOT_SPL_SRC - CFG_NAND_BOOT_SPL_DST)@l
1028 #endif /* CONFIG_NAND_SPL */
1030 /*----------------------------------------------------------------------- */
1031 /* Setup temporary stack in DCACHE or OCM if needed for SDRAM SPD. */
1032 /*----------------------------------------------------------------------- */
1033 #ifdef CFG_INIT_DCACHE_CS
1034 /*----------------------------------------------------------------------- */
1035 /* Memory Bank x (nothingness) initialization 1GB+64MEG */
1036 /* used as temporary stack pointer for stage0 */
1037 /*----------------------------------------------------------------------- */
1050 /* turn on data cache for this region */
1054 /* set stack pointer and clear stack to known value */
1056 lis r1,CFG_INIT_RAM_ADDR@h
1057 ori r1,r1,CFG_INIT_SP_OFFSET@l
1059 li r4,2048 /* we store 2048 words to stack */
1062 lis r2,CFG_INIT_RAM_ADDR@h /* we also clear data area */
1063 ori r2,r2,CFG_INIT_RAM_END@l /* so cant copy value from r1 */
1065 lis r4,0xdead /* we store 0xdeaddead in the stack */
1072 li r0, 0 /* Make room for stack frame header and */
1073 stwu r0, -4(r1) /* clear final stack frame so that */
1074 stwu r0, -4(r1) /* stack backtraces terminate cleanly */
1076 * Set up a dummy frame to store reset vector as return address.
1077 * this causes stack underflow to reset board.
1079 stwu r1, -8(r1) /* Save back chain and move SP */
1080 addis r0, 0, RESET_VECTOR@h /* Address of reset vector */
1081 ori r0, r0, RESET_VECTOR@l
1082 stwu r1, -8(r1) /* Save back chain and move SP */
1083 stw r0, +12(r1) /* Save return addr (underflow vect) */
1085 #elif defined(CFG_TEMP_STACK_OCM) && \
1086 (defined(CFG_OCM_DATA_ADDR) && defined(CFG_OCM_DATA_SIZE))
1091 /* Set up Stack at top of OCM */
1092 lis r1, (CFG_INIT_RAM_ADDR + CFG_INIT_SP_OFFSET)@h
1093 ori r1, r1, (CFG_INIT_RAM_ADDR + CFG_INIT_SP_OFFSET)@l
1095 /* Set up a zeroized stack frame so that backtrace works right */
1101 * Set up a dummy frame to store reset vector as return address.
1102 * this causes stack underflow to reset board.
1104 stwu r1, -8(r1) /* Save back chain and move SP */
1105 lis r0, RESET_VECTOR@h /* Address of reset vector */
1106 ori r0, r0, RESET_VECTOR@l
1107 stwu r1, -8(r1) /* Save back chain and move SP */
1108 stw r0, +12(r1) /* Save return addr (underflow vect) */
1109 #endif /* CFG_INIT_DCACHE_CS */
1111 /*----------------------------------------------------------------------- */
1112 /* Initialize SDRAM Controller */
1113 /*----------------------------------------------------------------------- */
1116 #ifdef CONFIG_NAND_SPL
1117 bl nand_boot /* will not return */
1119 GET_GOT /* initialize GOT access */
1121 bl cpu_init_f /* run low-level CPU init code (from Flash) */
1123 /* NEVER RETURNS! */
1124 bl board_init_f /* run first part of init code (from Flash) */
1125 #endif /* CONFIG_NAND_SPL */
1127 #endif /* CONFIG_405GP || CONFIG_405CR || CONFIG_405 || CONFIG_405EP */
1128 /*----------------------------------------------------------------------- */
1131 #ifndef CONFIG_NAND_SPL
1133 * This code finishes saving the registers to the exception frame
1134 * and jumps to the appropriate handler for the exception.
1135 * Register r21 is pointer into trap frame, r1 has new stack pointer.
1137 .globl transfer_to_handler
1138 transfer_to_handler:
1148 andi. r24,r23,0x3f00 /* get vector offset */
1152 mtspr SPRG2,r22 /* r1 is now kernel sp */
1153 lwz r24,0(r23) /* virtual address of handler */
1154 lwz r23,4(r23) /* where to go when done */
1159 rfi /* jump to handler, enable MMU */
1162 mfmsr r28 /* Disable interrupts */
1166 SYNC /* Some chip revs need this... */
1181 lwz r2,_NIP(r1) /* Restore environment */
1192 mfmsr r28 /* Disable interrupts */
1196 SYNC /* Some chip revs need this... */
1211 lwz r2,_NIP(r1) /* Restore environment */
1223 mfmsr r28 /* Disable interrupts */
1227 SYNC /* Some chip revs need this... */
1242 lwz r2,_NIP(r1) /* Restore environment */
1251 #endif /* CONFIG_440 */
1259 /*------------------------------------------------------------------------------- */
1260 /* Function: out16 */
1261 /* Description: Output 16 bits */
1262 /*------------------------------------------------------------------------------- */
1268 /*------------------------------------------------------------------------------- */
1269 /* Function: out16r */
1270 /* Description: Byte reverse and output 16 bits */
1271 /*------------------------------------------------------------------------------- */
1277 /*------------------------------------------------------------------------------- */
1278 /* Function: out32r */
1279 /* Description: Byte reverse and output 32 bits */
1280 /*------------------------------------------------------------------------------- */
1286 /*------------------------------------------------------------------------------- */
1287 /* Function: in16 */
1288 /* Description: Input 16 bits */
1289 /*------------------------------------------------------------------------------- */
1295 /*------------------------------------------------------------------------------- */
1296 /* Function: in16r */
1297 /* Description: Input 16 bits and byte reverse */
1298 /*------------------------------------------------------------------------------- */
1304 /*------------------------------------------------------------------------------- */
1305 /* Function: in32r */
1306 /* Description: Input 32 bits and byte reverse */
1307 /*------------------------------------------------------------------------------- */
1314 * void relocate_code (addr_sp, gd, addr_moni)
1316 * This "function" does not return, instead it continues in RAM
1317 * after relocating the monitor code.
1321 * r5 = length in bytes
1322 * r6 = cachelinesize
1324 .globl relocate_code
1326 #ifdef CONFIG_4xx_DCACHE
1328 * We need to flush the Init Data before the dcache will be
1338 addi r4,r4,0x200 /* should be enough for init data */
1339 bl flush_dcache_range
1347 #ifdef CFG_INIT_RAM_DCACHE
1349 * Unlock the previously locked d-cache
1353 /* set TFLOOR/NFLOOR to 0 again */
1369 #endif /* CFG_INIT_RAM_DCACHE */
1371 #if defined(CONFIG_440EP) || defined(CONFIG_440GR) || \
1372 defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
1373 defined(CONFIG_440SP) || defined(CONFIG_440SPE)
1375 * On some 440er platforms the cache is enabled in the first TLB (Boot-CS)
1376 * to speed up the boot process. Now this cache needs to be disabled.
1378 iccci 0,0 /* Invalidate inst cache */
1379 dccci 0,0 /* Invalidate data cache, now no longer our stack */
1382 #ifdef CFG_TLB_FOR_BOOT_FLASH
1383 addi r1,r0,CFG_TLB_FOR_BOOT_FLASH /* Use defined TLB */
1385 addi r1,r0,0x0000 /* Default TLB entry is #0 */
1387 tlbre r0,r1,0x0002 /* Read contents */
1388 ori r0,r0,0x0c00 /* Or in the inhibit, write through bit */
1389 tlbwe r0,r1,0x0002 /* Save it out */
1393 mr r1, r3 /* Set new stack pointer */
1394 mr r9, r4 /* Save copy of Init Data pointer */
1395 mr r10, r5 /* Save copy of Destination Address */
1397 mr r3, r5 /* Destination Address */
1398 lis r4, CFG_MONITOR_BASE@h /* Source Address */
1399 ori r4, r4, CFG_MONITOR_BASE@l
1400 lwz r5, GOT(__init_end)
1402 li r6, L1_CACHE_BYTES /* Cache Line Size */
1407 * New GOT-PTR = (old GOT-PTR - CFG_MONITOR_BASE) + Destination Address
1413 /* First our own GOT */
1415 /* the the one used by the C code */
1425 beq cr1,4f /* In place copy is not necessary */
1426 beq 7f /* Protect against 0 count */
1445 * Now flush the cache: note that we must start from a cache aligned
1446 * address. Otherwise we might miss one cache line.
1450 beq 7f /* Always flush prefetch queue in any case */
1458 sync /* Wait for all dcbst to complete on bus */
1464 7: sync /* Wait for all icbi to complete on bus */
1468 * We are done. Do not return, instead branch to second part of board
1469 * initialization, now running from RAM.
1472 addi r0, r10, in_ram - _start + _START_OFFSET
1474 blr /* NEVER RETURNS! */
1479 * Relocation Function, r14 point to got2+0x8000
1481 * Adjust got2 pointers, no need to check for 0, this code
1482 * already puts a few entries in the table.
1484 li r0,__got2_entries@sectoff@l
1485 la r3,GOT(_GOT2_TABLE_)
1486 lwz r11,GOT(_GOT2_TABLE_)
1496 * Now adjust the fixups and the pointers to the fixups
1497 * in case we need to move ourselves again.
1499 2: li r0,__fixup_entries@sectoff@l
1500 lwz r3,GOT(_FIXUP_TABLE_)
1514 * Now clear BSS segment
1516 lwz r3,GOT(__bss_start)
1539 mr r3, r9 /* Init Data pointer */
1540 mr r4, r10 /* Destination Address */
1544 * Copy exception vector code to low memory
1547 * r7: source address, r8: end address, r9: target address
1551 lwz r7, GOT(_start_of_vectors)
1552 lwz r8, GOT(_end_of_vectors)
1554 li r9, 0x100 /* reset vector always at 0x100 */
1557 bgelr /* return if r7>=r8 - just in case */
1559 mflr r4 /* save link register */
1569 * relocate `hdlr' and `int_return' entries
1571 li r7, .L_MachineCheck - _start + _START_OFFSET
1572 li r8, Alignment - _start + _START_OFFSET
1575 addi r7, r7, 0x100 /* next exception vector */
1579 li r7, .L_Alignment - _start + _START_OFFSET
1582 li r7, .L_ProgramCheck - _start + _START_OFFSET
1586 li r7, .L_FPUnavailable - _start + _START_OFFSET
1589 li r7, .L_Decrementer - _start + _START_OFFSET
1592 li r7, .L_APU - _start + _START_OFFSET
1595 li r7, .L_InstructionTLBError - _start + _START_OFFSET
1598 li r7, .L_DataTLBError - _start + _START_OFFSET
1600 #else /* CONFIG_440 */
1601 li r7, .L_PIT - _start + _START_OFFSET
1604 li r7, .L_InstructionTLBMiss - _start + _START_OFFSET
1607 li r7, .L_DataTLBMiss - _start + _START_OFFSET
1609 #endif /* CONFIG_440 */
1611 li r7, .L_DebugBreakpoint - _start + _START_OFFSET
1614 #if !defined(CONFIG_440)
1615 addi r7,r0,0x1000 /* set ME bit (Machine Exceptions) */
1616 oris r7,r7,0x0002 /* set CE bit (Critical Exceptions) */
1617 mtmsr r7 /* change MSR */
1620 b __440_msr_continue
1623 addi r7,r0,0x1000 /* set ME bit (Machine Exceptions) */
1624 oris r7,r7,0x0002 /* set CE bit (Critical Exceptions) */
1632 mtlr r4 /* restore link register */
1636 * Function: relocate entries for one exception vector
1639 lwz r0, 0(r7) /* hdlr ... */
1640 add r0, r0, r3 /* ... += dest_addr */
1643 lwz r0, 4(r7) /* int_return ... */
1644 add r0, r0, r3 /* ... += dest_addr */
1649 #if defined(CONFIG_440)
1650 /*----------------------------------------------------------------------------+
1652 +----------------------------------------------------------------------------*/
1653 function_prolog(dcbz_area)
1654 rlwinm. r5,r4,0,27,31
1655 rlwinm r5,r4,27,5,31
1664 function_epilog(dcbz_area)
1666 /*----------------------------------------------------------------------------+
1667 | dflush. Assume 32K at vector address is cachable.
1668 +----------------------------------------------------------------------------*/
1669 function_prolog(dflush)
1671 rlwinm r8,r9,0,15,13
1672 rlwinm r8,r8,0,17,15
1693 function_epilog(dflush)
1694 #endif /* CONFIG_440 */
1695 #endif /* CONFIG_NAND_SPL */
1697 /*------------------------------------------------------------------------------- */
1699 /* Description: Input 8 bits */
1700 /*------------------------------------------------------------------------------- */
1706 /*------------------------------------------------------------------------------- */
1707 /* Function: out8 */
1708 /* Description: Output 8 bits */
1709 /*------------------------------------------------------------------------------- */
1715 /*------------------------------------------------------------------------------- */
1716 /* Function: out32 */
1717 /* Description: Output 32 bits */
1718 /*------------------------------------------------------------------------------- */
1724 /*------------------------------------------------------------------------------- */
1725 /* Function: in32 */
1726 /* Description: Input 32 bits */
1727 /*------------------------------------------------------------------------------- */
1733 /**************************************************************************/
1734 /* PPC405EP specific stuff */
1735 /**************************************************************************/
1739 #ifdef CONFIG_BUBINGA
1741 * Initialize EBC chip selects 1 & 4 and GPIO pins (for alternate
1742 * function) to support FPGA and NVRAM accesses below.
1745 lis r3,GPIO0_OSRH@h /* config GPIO output select */
1746 ori r3,r3,GPIO0_OSRH@l
1747 lis r4,CFG_GPIO0_OSRH@h
1748 ori r4,r4,CFG_GPIO0_OSRH@l
1751 ori r3,r3,GPIO0_OSRL@l
1752 lis r4,CFG_GPIO0_OSRL@h
1753 ori r4,r4,CFG_GPIO0_OSRL@l
1756 lis r3,GPIO0_ISR1H@h /* config GPIO input select */
1757 ori r3,r3,GPIO0_ISR1H@l
1758 lis r4,CFG_GPIO0_ISR1H@h
1759 ori r4,r4,CFG_GPIO0_ISR1H@l
1761 lis r3,GPIO0_ISR1L@h
1762 ori r3,r3,GPIO0_ISR1L@l
1763 lis r4,CFG_GPIO0_ISR1L@h
1764 ori r4,r4,CFG_GPIO0_ISR1L@l
1767 lis r3,GPIO0_TSRH@h /* config GPIO three-state select */
1768 ori r3,r3,GPIO0_TSRH@l
1769 lis r4,CFG_GPIO0_TSRH@h
1770 ori r4,r4,CFG_GPIO0_TSRH@l
1773 ori r3,r3,GPIO0_TSRL@l
1774 lis r4,CFG_GPIO0_TSRL@h
1775 ori r4,r4,CFG_GPIO0_TSRL@l
1778 lis r3,GPIO0_TCR@h /* config GPIO driver output enables */
1779 ori r3,r3,GPIO0_TCR@l
1780 lis r4,CFG_GPIO0_TCR@h
1781 ori r4,r4,CFG_GPIO0_TCR@l
1784 li r3,pb1ap /* program EBC bank 1 for RTC access */
1786 lis r3,CFG_EBC_PB1AP@h
1787 ori r3,r3,CFG_EBC_PB1AP@l
1791 lis r3,CFG_EBC_PB1CR@h
1792 ori r3,r3,CFG_EBC_PB1CR@l
1795 li r3,pb1ap /* program EBC bank 1 for RTC access */
1797 lis r3,CFG_EBC_PB1AP@h
1798 ori r3,r3,CFG_EBC_PB1AP@l
1802 lis r3,CFG_EBC_PB1CR@h
1803 ori r3,r3,CFG_EBC_PB1CR@l
1806 li r3,pb4ap /* program EBC bank 4 for FPGA access */
1808 lis r3,CFG_EBC_PB4AP@h
1809 ori r3,r3,CFG_EBC_PB4AP@l
1813 lis r3,CFG_EBC_PB4CR@h
1814 ori r3,r3,CFG_EBC_PB4CR@l
1819 !-----------------------------------------------------------------------
1820 ! Check to see if chip is in bypass mode.
1821 ! If so, write stored CPC0_PLLMR0 and CPC0_PLLMR1 values and perform a
1822 ! CPU reset Otherwise, skip this step and keep going.
1823 ! Note: Running BIOS in bypass mode is not supported since PLB speed
1824 ! will not be fast enough for the SDRAM (min 66MHz)
1825 !-----------------------------------------------------------------------
1827 mfdcr r5, CPC0_PLLMR1
1828 rlwinm r4,r5,1,0x1 /* get system clock source (SSCS) */
1831 beq pll_done /* if SSCS =b'1' then PLL has */
1832 /* already been set */
1833 /* and CPU has been reset */
1834 /* so skip to next section */
1836 #ifdef CONFIG_BUBINGA
1838 !-----------------------------------------------------------------------
1839 ! Read NVRAM to get value to write in PLLMR.
1840 ! If value has not been correctly saved, write default value
1841 ! Default config values (assuming on-board 33MHz SYS_CLK) are above.
1842 ! See CPU_DEFAULT_200 and CPU_DEFAULT_266 above.
1844 ! WARNING: This code assumes the first three words in the nvram_t
1845 ! structure in openbios.h. Changing the beginning of
1846 ! the structure will break this code.
1848 !-----------------------------------------------------------------------
1850 addis r3,0,NVRAM_BASE@h
1851 addi r3,r3,NVRAM_BASE@l
1854 addis r5,0,NVRVFY1@h
1855 addi r5,r5,NVRVFY1@l
1856 cmp cr0,0,r4,r5 /* Compare 1st NVRAM Magic number*/
1860 addis r5,0,NVRVFY2@h
1861 addi r5,r5,NVRVFY2@l
1862 cmp cr0,0,r4,r5 /* Compare 2 NVRAM Magic number */
1864 addi r3,r3,8 /* Skip over conf_size */
1865 lwz r4, 4(r3) /* Load PLLMR1 value from NVRAM */
1866 lwz r3, 0(r3) /* Load PLLMR0 value from NVRAM */
1867 rlwinm r5,r4,1,0x1 /* get system clock source (SSCS) */
1868 cmpi cr0,0,r5,1 /* See if PLL is locked */
1871 #endif /* CONFIG_BUBINGA */
1875 andi. r5, r4, CPC0_BOOT_SEP@l
1876 bne strap_1 /* serial eeprom present */
1877 addis r5,0,CPLD_REG0_ADDR@h
1878 ori r5,r5,CPLD_REG0_ADDR@l
1881 #endif /* CONFIG_TAIHU */
1883 #if defined(CONFIG_ZEUS)
1885 andi. r5, r4, CPC0_BOOT_SEP@l
1886 bne strap_1 /* serial eeprom present */
1893 mfdcr r3, CPC0_PLLMR0
1894 mfdcr r4, CPC0_PLLMR1
1898 addis r3,0,PLLMR0_DEFAULT@h /* PLLMR0 default value */
1899 ori r3,r3,PLLMR0_DEFAULT@l /* */
1900 addis r4,0,PLLMR1_DEFAULT@h /* PLLMR1 default value */
1901 ori r4,r4,PLLMR1_DEFAULT@l /* */
1906 addis r3,0,PLLMR0_DEFAULT_PCI66@h
1907 ori r3,r3,PLLMR0_DEFAULT_PCI66@l
1908 addis r4,0,PLLMR1_DEFAULT_PCI66@h
1909 ori r4,r4,PLLMR1_DEFAULT_PCI66@l
1912 mfdcr r3, CPC0_PLLMR0
1913 mfdcr r4, CPC0_PLLMR1
1914 #endif /* CONFIG_TAIHU */
1917 b pll_write /* Write the CPC0_PLLMR with new value */
1921 !-----------------------------------------------------------------------
1922 ! Clear Soft Reset Register
1923 ! This is needed to enable PCI if not booting from serial EPROM
1924 !-----------------------------------------------------------------------
1934 blr /* return to main code */
1937 !-----------------------------------------------------------------------------
1938 ! Function: pll_write
1939 ! Description: Updates the value of the CPC0_PLLMR according to CMOS27E documentation
1941 ! 1. Pll is first disabled (de-activated by putting in bypass mode)
1943 ! 3. Clock dividers are set while PLL is held in reset and bypassed
1944 ! 4. PLL Reset is cleared
1945 ! 5. Wait 100us for PLL to lock
1946 ! 6. A core reset is performed
1947 ! Input: r3 = Value to write to CPC0_PLLMR0
1948 ! Input: r4 = Value to write to CPC0_PLLMR1
1950 !-----------------------------------------------------------------------------
1955 ori r5,r5,0x0101 /* Stop the UART clocks */
1956 mtdcr CPC0_UCR,r5 /* Before changing PLL */
1958 mfdcr r5, CPC0_PLLMR1
1959 rlwinm r5,r5,0,0x7FFFFFFF /* Disable PLL */
1960 mtdcr CPC0_PLLMR1,r5
1961 oris r5,r5,0x4000 /* Set PLL Reset */
1962 mtdcr CPC0_PLLMR1,r5
1964 mtdcr CPC0_PLLMR0,r3 /* Set clock dividers */
1965 rlwinm r5,r4,0,0x3FFFFFFF /* Reset & Bypass new PLL dividers */
1966 oris r5,r5,0x4000 /* Set PLL Reset */
1967 mtdcr CPC0_PLLMR1,r5 /* Set clock dividers */
1968 rlwinm r5,r5,0,0xBFFFFFFF /* Clear PLL Reset */
1969 mtdcr CPC0_PLLMR1,r5
1972 ! Wait min of 100us for PLL to lock.
1973 ! See CMOS 27E databook for more info.
1974 ! At 200MHz, that means waiting 20,000 instructions
1976 addi r3,0,20000 /* 2000 = 0x4e20 */
1981 oris r5,r5,0x8000 /* Enable PLL */
1982 mtdcr CPC0_PLLMR1,r5 /* Engage */
1985 * Reset CPU to guarantee timings are OK
1986 * Not sure if this is needed...
1989 mtspr dbcr0,r3 /* This will cause a CPU core reset, and */
1990 /* execution will continue from the poweron */
1991 /* vector of 0xfffffffc */
1992 #endif /* CONFIG_405EP */
1994 #if defined(CONFIG_440)
1995 /*----------------------------------------------------------------------------+
1997 +----------------------------------------------------------------------------*/
1998 function_prolog(mttlb3)
2001 function_epilog(mttlb3)
2003 /*----------------------------------------------------------------------------+
2005 +----------------------------------------------------------------------------*/
2006 function_prolog(mftlb3)
2009 function_epilog(mftlb3)
2011 /*----------------------------------------------------------------------------+
2013 +----------------------------------------------------------------------------*/
2014 function_prolog(mttlb2)
2017 function_epilog(mttlb2)
2019 /*----------------------------------------------------------------------------+
2021 +----------------------------------------------------------------------------*/
2022 function_prolog(mftlb2)
2025 function_epilog(mftlb2)
2027 /*----------------------------------------------------------------------------+
2029 +----------------------------------------------------------------------------*/
2030 function_prolog(mttlb1)
2033 function_epilog(mttlb1)
2035 /*----------------------------------------------------------------------------+
2037 +----------------------------------------------------------------------------*/
2038 function_prolog(mftlb1)
2041 function_epilog(mftlb1)
2042 #endif /* CONFIG_440 */