2 * Copyright 2004, 2007-2012 Freescale Semiconductor, Inc.
3 * Copyright (C) 2003 Motorola,Inc.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 /* U-Boot Startup Code for Motorola 85xx PowerPC based Embedded Boards
26 * The processor starts at 0xfffffffc and the code is first executed in the
27 * last 4K page(0xfffff000-0xffffffff) in flash/rom.
31 #include <asm-offsets.h>
36 #define _LINUX_CONFIG_H 1 /* avoid reading Linux autoconf.h file */
38 #include <ppc_asm.tmpl>
41 #include <asm/cache.h>
45 #define MSR_KERNEL ( MSR_ME ) /* Machine Check */
48 * Set up GOT: Global Offset Table
50 * Use r12 to access the GOT
53 GOT_ENTRY(_GOT2_TABLE_)
54 GOT_ENTRY(_FIXUP_TABLE_)
56 #ifndef CONFIG_NAND_SPL
58 GOT_ENTRY(_start_of_vectors)
59 GOT_ENTRY(_end_of_vectors)
60 GOT_ENTRY(transfer_to_handler)
64 GOT_ENTRY(__bss_end__)
65 GOT_ENTRY(__bss_start)
69 * e500 Startup -- after reset only the last 4KB of the effective
70 * address space is mapped in the MMU L2 TLB1 Entry0. The .bootpg
71 * section is located at THIS LAST page and basically does three
72 * things: clear some registers, set up exception tables and
73 * add more TLB entries for 'larger spaces'(e.g. the boot rom) to
74 * continue the boot procedure.
76 * Once the boot rom is mapped by TLB entries we can proceed
77 * with normal startup.
85 /* Enable debug exception */
89 #if defined(CONFIG_SECURE_BOOT) && defined(CONFIG_E500MC)
90 /* ISBC uses L2 as stack.
91 * Disable L2 cache here so that u-boot can enable it later
92 * as part of it's normal flow
95 /* Check if L2 is enabled */
98 ori r2, r2, L2CSR0_L2E@l
102 mfspr r3, SPRN_L2CSR0
104 lis r2,(L2CSR0_L2FL)@h
105 ori r2, r2, (L2CSR0_L2FL)@l
112 mfspr r3, SPRN_L2CSR0
116 mfspr r3, SPRN_L2CSR0
118 ori r2, r2, L2CSR0_L2E@l
128 /* clear registers/arrays not reset by hardware */
132 mtspr L1CSR0,r0 /* invalidate d-cache */
133 mtspr L1CSR1,r0 /* invalidate i-cache */
136 mtspr DBSR,r1 /* Clear all valid bits */
139 * Enable L1 Caches early
143 #if defined(CONFIG_E500MC) && defined(CONFIG_SYS_CACHE_STASHING)
144 /* set stash id to (coreID) * 2 + 32 + L1 CT (0) */
149 /* Enable/invalidate the I-Cache */
150 lis r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@h
151 ori r2,r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@l
158 lis r3,(L1CSR1_CPE|L1CSR1_ICE)@h
159 ori r3,r3,(L1CSR1_CPE|L1CSR1_ICE)@l
164 andi. r1,r3,L1CSR1_ICE@l
167 /* Enable/invalidate the D-Cache */
168 lis r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@h
169 ori r2,r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@l
176 lis r3,(L1CSR0_CPE|L1CSR0_DCE)@h
177 ori r3,r3,(L1CSR0_CPE|L1CSR0_DCE)@l
182 andi. r1,r3,L1CSR0_DCE@l
186 * Ne need to setup interrupt vector for NAND SPL
187 * because NAND SPL never compiles it.
189 #if !defined(CONFIG_NAND_SPL)
190 /* Setup interrupt vectors */
191 lis r1,CONFIG_SYS_MONITOR_BASE@h
194 lis r3,(CONFIG_SYS_MONITOR_BASE & 0xffff)@h
195 ori r3,r3,(CONFIG_SYS_MONITOR_BASE & 0xffff)@l
197 addi r4,r3,CriticalInput - _start + _START_OFFSET
198 mtspr IVOR0,r4 /* 0: Critical input */
199 addi r4,r3,MachineCheck - _start + _START_OFFSET
200 mtspr IVOR1,r4 /* 1: Machine check */
201 addi r4,r3,DataStorage - _start + _START_OFFSET
202 mtspr IVOR2,r4 /* 2: Data storage */
203 addi r4,r3,InstStorage - _start + _START_OFFSET
204 mtspr IVOR3,r4 /* 3: Instruction storage */
205 addi r4,r3,ExtInterrupt - _start + _START_OFFSET
206 mtspr IVOR4,r4 /* 4: External interrupt */
207 addi r4,r3,Alignment - _start + _START_OFFSET
208 mtspr IVOR5,r4 /* 5: Alignment */
209 addi r4,r3,ProgramCheck - _start + _START_OFFSET
210 mtspr IVOR6,r4 /* 6: Program check */
211 addi r4,r3,FPUnavailable - _start + _START_OFFSET
212 mtspr IVOR7,r4 /* 7: floating point unavailable */
213 addi r4,r3,SystemCall - _start + _START_OFFSET
214 mtspr IVOR8,r4 /* 8: System call */
215 /* 9: Auxiliary processor unavailable(unsupported) */
216 addi r4,r3,Decrementer - _start + _START_OFFSET
217 mtspr IVOR10,r4 /* 10: Decrementer */
218 addi r4,r3,IntervalTimer - _start + _START_OFFSET
219 mtspr IVOR11,r4 /* 11: Interval timer */
220 addi r4,r3,WatchdogTimer - _start + _START_OFFSET
221 mtspr IVOR12,r4 /* 12: Watchdog timer */
222 addi r4,r3,DataTLBError - _start + _START_OFFSET
223 mtspr IVOR13,r4 /* 13: Data TLB error */
224 addi r4,r3,InstructionTLBError - _start + _START_OFFSET
225 mtspr IVOR14,r4 /* 14: Instruction TLB error */
226 addi r4,r3,DebugBreakpoint - _start + _START_OFFSET
227 mtspr IVOR15,r4 /* 15: Debug */
230 /* Clear and set up some registers. */
233 mtspr DEC,r0 /* prevent dec exceptions */
234 mttbl r0 /* prevent fit & wdt exceptions */
236 mtspr TSR,r1 /* clear all timer exception status */
237 mtspr TCR,r0 /* disable all */
238 mtspr ESR,r0 /* clear exception syndrome register */
239 mtspr MCSR,r0 /* machine check syndrome register */
240 mtxer r0 /* clear integer exception register */
242 #ifdef CONFIG_SYS_BOOK3E_HV
243 mtspr MAS8,r0 /* make sure MAS8 is clear */
246 /* Enable Time Base and Select Time Base Clock */
247 lis r0,HID0_EMCP@h /* Enable machine check */
248 #if defined(CONFIG_ENABLE_36BIT_PHYS)
249 ori r0,r0,HID0_ENMAS7@l /* Enable MAS7 */
251 #ifndef CONFIG_E500MC
252 ori r0,r0,HID0_TBEN@l /* Enable Timebase */
256 #ifndef CONFIG_E500MC
257 li r0,(HID1_ASTME|HID1_ABE)@l /* Addr streaming & broadcast */
260 cmpwi r3,0x50@l /* if we are rev 5.0 or greater set MBDD */
262 /* Set MBDD bit also */
263 ori r0, r0, HID1_MBDD@l
268 #ifdef CONFIG_SYS_FSL_ERRATUM_CPU_A003999
274 /* Enable Branch Prediction */
275 #if defined(CONFIG_BTB)
276 lis r0,BUCSR_ENABLE@h
277 ori r0,r0,BUCSR_ENABLE@l
281 #if defined(CONFIG_SYS_INIT_DBCR)
284 mtspr DBSR,r1 /* Clear all status bits */
285 lis r0,CONFIG_SYS_INIT_DBCR@h /* DBCR0[IDM] must be set */
286 ori r0,r0,CONFIG_SYS_INIT_DBCR@l
290 #ifdef CONFIG_MPC8569
291 #define CONFIG_SYS_LBC_ADDR (CONFIG_SYS_CCSRBAR_DEFAULT + 0x5000)
292 #define CONFIG_SYS_LBCR_ADDR (CONFIG_SYS_LBC_ADDR + 0xd0)
294 /* MPC8569 Rev.0 silcon needs to set bit 13 of LBCR to allow elBC to
295 * use address space which is more than 12bits, and it must be done in
296 * the 4K boot page. So we set this bit here.
299 /* create a temp mapping TLB0[0] for LBCR */
300 lis r6,FSL_BOOKE_MAS0(0, 0, 0)@h
301 ori r6,r6,FSL_BOOKE_MAS0(0, 0, 0)@l
303 lis r7,FSL_BOOKE_MAS1(1, 0, 0, 0, BOOKE_PAGESZ_4K)@h
304 ori r7,r7,FSL_BOOKE_MAS1(1, 0, 0, 0, BOOKE_PAGESZ_4K)@l
306 lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_LBC_ADDR, MAS2_I|MAS2_G)@h
307 ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_LBC_ADDR, MAS2_I|MAS2_G)@l
309 lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_LBC_ADDR, 0,
310 (MAS3_SX|MAS3_SW|MAS3_SR))@h
311 ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_LBC_ADDR, 0,
312 (MAS3_SX|MAS3_SW|MAS3_SR))@l
322 /* Set LBCR register */
323 lis r4,CONFIG_SYS_LBCR_ADDR@h
324 ori r4,r4,CONFIG_SYS_LBCR_ADDR@l
326 lis r5,CONFIG_SYS_LBC_LBCR@h
327 ori r5,r5,CONFIG_SYS_LBC_LBCR@l
331 /* invalidate this temp TLB */
332 lis r4,CONFIG_SYS_LBC_ADDR@h
333 ori r4,r4,CONFIG_SYS_LBC_ADDR@l
337 #endif /* CONFIG_MPC8569 */
340 * Search for the TLB that covers the code we're executing, and shrink it
341 * so that it covers only this 4K page. That will ensure that any other
342 * TLB we create won't interfere with it. We assume that the TLB exists,
343 * which is why we don't check the Valid bit of MAS1.
345 * This is necessary, for example, when booting from the on-chip ROM,
346 * which (oddly) creates a single 4GB TLB that covers CCSR and DDR.
347 * If we don't shrink this TLB now, then we'll accidentally delete it
348 * in "purge_old_ccsr_tlb" below.
350 bl nexti /* Find our address */
351 nexti: mflr r1 /* R1 = our PC */
353 mtspr MAS6, r2 /* Assume the current PID and AS are 0 */
356 tlbsx 0, r1 /* This must succeed */
358 /* Set the size of the TLB to 4KB */
361 andc r3, r3, r2 /* Clear the TSIZE bits */
362 ori r3, r3, MAS1_TSIZE(BOOKE_PAGESZ_4K)@l
366 * Set the base address of the TLB to our PC. We assume that
367 * virtual == physical. We also assume that MAS2_EPN == MAS3_RPN.
370 ori r3, r3, MAS2_EPN@l /* R3 = MAS2_EPN */
372 and r1, r1, r3 /* Our PC, rounded down to the nearest page */
377 mtspr MAS2, r2 /* Set the EPN to our PC base address */
382 mtspr MAS3, r2 /* Set the RPN to our PC base address */
389 * Relocate CCSR, if necessary. We relocate CCSR if (obviously) the default
390 * location is not where we want it. This typically happens on a 36-bit
391 * system, where we want to move CCSR to near the top of 36-bit address space.
393 * To move CCSR, we create two temporary TLBs, one for the old location, and
394 * another for the new location. On CoreNet systems, we also need to create
395 * a special, temporary LAW.
397 * As a general rule, TLB0 is used for short-term TLBs, and TLB1 is used for
398 * long-term TLBs, so we use TLB0 here.
400 #if (CONFIG_SYS_CCSRBAR_DEFAULT != CONFIG_SYS_CCSRBAR_PHYS)
402 #if !defined(CONFIG_SYS_CCSRBAR_PHYS_HIGH) || !defined(CONFIG_SYS_CCSRBAR_PHYS_LOW)
403 #error "CONFIG_SYS_CCSRBAR_PHYS_HIGH and CONFIG_SYS_CCSRBAR_PHYS_LOW) must be defined."
407 lis r8, CONFIG_SYS_CCSRBAR@h
408 ori r8, r8, CONFIG_SYS_CCSRBAR@l
409 lis r9, (CONFIG_SYS_CCSRBAR + 0x1000)@h
410 ori r9, r9, (CONFIG_SYS_CCSRBAR + 0x1000)@l
413 * In a multi-stage boot (e.g. NAND boot), a previous stage may have
414 * created a TLB for CCSR, which will interfere with our relocation
415 * code. Since we're going to create a new TLB for CCSR anyway,
416 * it should be safe to delete this old TLB here. We have to search
421 mtspr MAS6, r1 /* Search the current address space and PID */
426 andis. r2, r1, MAS1_VALID@h /* Check for the Valid bit */
427 beq 1f /* Skip if no TLB found */
429 rlwinm r1, r1, 0, 1, 31 /* Clear Valid bit */
438 * Create a TLB for the new location of CCSR. Register R8 is reserved
439 * for the virtual address of this TLB (CONFIG_SYS_CCSRBAR).
441 lis r0, FSL_BOOKE_MAS0(0, 0, 0)@h
442 ori r0, r0, FSL_BOOKE_MAS0(0, 0, 0)@l
443 lis r1, FSL_BOOKE_MAS1(1, 0, 0, 0, BOOKE_PAGESZ_4K)@h
444 ori r1, r1, FSL_BOOKE_MAS1(1, 0, 0, 0, BOOKE_PAGESZ_4K)@l
445 lis r2, FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR, (MAS2_I|MAS2_G))@h
446 ori r2, r2, FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR, (MAS2_I|MAS2_G))@l
447 lis r3, FSL_BOOKE_MAS3(CONFIG_SYS_CCSRBAR_PHYS_LOW, 0, (MAS3_SW|MAS3_SR))@h
448 ori r3, r3, FSL_BOOKE_MAS3(CONFIG_SYS_CCSRBAR_PHYS_LOW, 0, (MAS3_SW|MAS3_SR))@l
449 #ifdef CONFIG_ENABLE_36BIT_PHYS
450 lis r7, CONFIG_SYS_CCSRBAR_PHYS_HIGH@h
451 ori r7, r7, CONFIG_SYS_CCSRBAR_PHYS_HIGH@l
463 * Create a TLB for the current location of CCSR. Register R9 is reserved
464 * for the virtual address of this TLB (CONFIG_SYS_CCSRBAR + 0x1000).
467 lis r0, FSL_BOOKE_MAS0(0, 1, 0)@h
468 ori r0, r0, FSL_BOOKE_MAS0(0, 1, 0)@l
469 lis r2, FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR + 0x1000, (MAS2_I|MAS2_G))@h
470 ori r2, r2, FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR + 0x1000, (MAS2_I|MAS2_G))@l
471 lis r3, FSL_BOOKE_MAS3(CONFIG_SYS_CCSRBAR_DEFAULT, 0, (MAS3_SW|MAS3_SR))@h
472 ori r3, r3, FSL_BOOKE_MAS3(CONFIG_SYS_CCSRBAR_DEFAULT, 0, (MAS3_SW|MAS3_SR))@l
473 #ifdef CONFIG_ENABLE_36BIT_PHYS
474 li r7, 0 /* The default CCSR address is always a 32-bit number */
478 /* MAS1 is the same as above */
486 * We have a TLB for what we think is the current (old) CCSR. Let's
487 * verify that, otherwise we won't be able to move it.
488 * CONFIG_SYS_CCSRBAR_DEFAULT is always a 32-bit number, so we only
489 * need to compare the lower 32 bits of CCSRBAR on CoreNet systems.
492 lis r0, CONFIG_SYS_CCSRBAR_DEFAULT@h
493 ori r0, r0, CONFIG_SYS_CCSRBAR_DEFAULT@l
494 #ifdef CONFIG_FSL_CORENET
495 lwz r1, 4(r9) /* CCSRBARL */
497 lwz r1, 0(r9) /* CCSRBAR, shifted right by 12 */
504 * If the value we read from CCSRBARL is not what we expect, then
505 * enter an infinite loop. This will at least allow a debugger to
506 * halt execution and examine TLBs, etc. There's no point in going
510 bne infinite_debug_loop
512 #ifdef CONFIG_FSL_CORENET
514 #define CCSR_LAWBARH0 (CONFIG_SYS_CCSRBAR + 0x1000)
515 #define LAW_EN 0x80000000
516 #define LAW_SIZE_4K 0xb
517 #define CCSRBAR_LAWAR (LAW_EN | (0x1e << 20) | LAW_SIZE_4K)
518 #define CCSRAR_C 0x80000000 /* Commit */
522 * On CoreNet systems, we create the temporary LAW using a special LAW
523 * target ID of 0x1e. LAWBARH is at offset 0xc00 in CCSR.
525 lis r0, CONFIG_SYS_CCSRBAR_PHYS_HIGH@h
526 ori r0, r0, CONFIG_SYS_CCSRBAR_PHYS_HIGH@l
527 lis r1, CONFIG_SYS_CCSRBAR_PHYS_LOW@h
528 ori r1, r1, CONFIG_SYS_CCSRBAR_PHYS_LOW@l
529 lis r2, CCSRBAR_LAWAR@h
530 ori r2, r2, CCSRBAR_LAWAR@l
532 stw r0, 0xc00(r9) /* LAWBARH0 */
533 stw r1, 0xc04(r9) /* LAWBARL0 */
535 stw r2, 0xc08(r9) /* LAWAR0 */
538 * Read back from LAWAR to ensure the update is complete. e500mc
539 * cores also require an isync.
541 lwz r0, 0xc08(r9) /* LAWAR0 */
545 * Read the current CCSRBARH and CCSRBARL using load word instructions.
546 * Follow this with an isync instruction. This forces any outstanding
547 * accesses to configuration space to completion.
550 lwz r0, 0(r9) /* CCSRBARH */
551 lwz r0, 4(r9) /* CCSRBARL */
555 * Write the new values for CCSRBARH and CCSRBARL to their old
556 * locations. The CCSRBARH has a shadow register. When the CCSRBARH
557 * has a new value written it loads a CCSRBARH shadow register. When
558 * the CCSRBARL is written, the CCSRBARH shadow register contents
559 * along with the CCSRBARL value are loaded into the CCSRBARH and
560 * CCSRBARL registers, respectively. Follow this with a sync
564 lis r0, CONFIG_SYS_CCSRBAR_PHYS_HIGH@h
565 ori r0, r0, CONFIG_SYS_CCSRBAR_PHYS_HIGH@l
566 lis r1, CONFIG_SYS_CCSRBAR_PHYS_LOW@h
567 ori r1, r1, CONFIG_SYS_CCSRBAR_PHYS_LOW@l
569 ori r2, r2, CCSRAR_C@l
571 stw r0, 0(r9) /* Write to CCSRBARH */
572 sync /* Make sure we write to CCSRBARH first */
573 stw r1, 4(r9) /* Write to CCSRBARL */
577 * Write a 1 to the commit bit (C) of CCSRAR at the old location.
578 * Follow this with a sync instruction.
583 /* Delete the temporary LAW */
592 #else /* #ifdef CONFIG_FSL_CORENET */
596 * Read the current value of CCSRBAR using a load word instruction
597 * followed by an isync. This forces all accesses to configuration
604 /* CONFIG_SYS_CCSRBAR_PHYS right shifted by 12 */
605 #define CCSRBAR_PHYS_RS12 ((CONFIG_SYS_CCSRBAR_PHYS_HIGH << 20) | \
606 (CONFIG_SYS_CCSRBAR_PHYS_LOW >> 12))
608 /* Write the new value to CCSRBAR. */
609 lis r0, CCSRBAR_PHYS_RS12@h
610 ori r0, r0, CCSRBAR_PHYS_RS12@l
615 * The manual says to perform a load of an address that does not
616 * access configuration space or the on-chip SRAM using an existing TLB,
617 * but that doesn't appear to be necessary. We will do the isync,
623 * Read the contents of CCSRBAR from its new location, followed by
629 #endif /* #ifdef CONFIG_FSL_CORENET */
631 /* Delete the temporary TLBs */
633 lis r0, FSL_BOOKE_MAS0(0, 0, 0)@h
634 ori r0, r0, FSL_BOOKE_MAS0(0, 0, 0)@l
636 lis r2, FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR, (MAS2_I|MAS2_G))@h
637 ori r2, r2, FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR, (MAS2_I|MAS2_G))@l
645 lis r0, FSL_BOOKE_MAS0(0, 1, 0)@h
646 ori r0, r0, FSL_BOOKE_MAS0(0, 1, 0)@l
647 lis r2, FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR + 0x1000, (MAS2_I|MAS2_G))@h
648 ori r2, r2, FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR + 0x1000, (MAS2_I|MAS2_G))@l
654 #endif /* #if (CONFIG_SYS_CCSRBAR_DEFAULT != CONFIG_SYS_CCSRBAR_PHYS) */
656 create_init_ram_area:
657 lis r6,FSL_BOOKE_MAS0(1, 15, 0)@h
658 ori r6,r6,FSL_BOOKE_MAS0(1, 15, 0)@l
660 #if !defined(CONFIG_SYS_RAMBOOT) && !defined(CONFIG_SECURE_BOOT)
661 /* create a temp mapping in AS=1 to the 4M boot window */
662 lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_4M)@h
663 ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_4M)@l
665 lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_MONITOR_BASE & 0xffc00000, (MAS2_I|MAS2_G))@h
666 ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_MONITOR_BASE & 0xffc00000, (MAS2_I|MAS2_G))@l
668 /* The 85xx has the default boot window 0xff800000 - 0xffffffff */
669 lis r9,FSL_BOOKE_MAS3(0xffc00000, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h
670 ori r9,r9,FSL_BOOKE_MAS3(0xffc00000, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l
671 #elif !defined(CONFIG_SYS_RAMBOOT) && defined(CONFIG_SECURE_BOOT)
672 /* create a temp mapping in AS = 1 for Flash mapping
673 * created by PBL for ISBC code
675 lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_1M)@h
676 ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_1M)@l
678 lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_MONITOR_BASE, (MAS2_I|MAS2_G))@h
679 ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_MONITOR_BASE, (MAS2_I|MAS2_G))@l
681 lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_PBI_FLASH_WINDOW, 0,
682 (MAS3_SX|MAS3_SW|MAS3_SR))@h
683 ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_PBI_FLASH_WINDOW, 0,
684 (MAS3_SX|MAS3_SW|MAS3_SR))@l
687 * create a temp mapping in AS=1 to the 1M CONFIG_SYS_MONITOR_BASE space, the main
688 * image has been relocated to CONFIG_SYS_MONITOR_BASE on the second stage.
690 lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_1M)@h
691 ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_1M)@l
693 lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_MONITOR_BASE, (MAS2_I|MAS2_G))@h
694 ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_MONITOR_BASE, (MAS2_I|MAS2_G))@l
696 lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_MONITOR_BASE, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h
697 ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_MONITOR_BASE, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l
708 /* create a temp mapping in AS=1 to the stack */
709 lis r6,FSL_BOOKE_MAS0(1, 14, 0)@h
710 ori r6,r6,FSL_BOOKE_MAS0(1, 14, 0)@l
712 lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_16K)@h
713 ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_16K)@l
715 lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_INIT_RAM_ADDR, 0)@h
716 ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_INIT_RAM_ADDR, 0)@l
718 #if defined(CONFIG_SYS_INIT_RAM_ADDR_PHYS_LOW) && \
719 defined(CONFIG_SYS_INIT_RAM_ADDR_PHYS_HIGH)
720 lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR_PHYS_LOW, 0,
721 (MAS3_SX|MAS3_SW|MAS3_SR))@h
722 ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR_PHYS_LOW, 0,
723 (MAS3_SX|MAS3_SW|MAS3_SR))@l
724 li r10,CONFIG_SYS_INIT_RAM_ADDR_PHYS_HIGH
727 lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h
728 ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l
739 lis r6,MSR_IS|MSR_DS|MSR_DE@h
740 ori r6,r6,MSR_IS|MSR_DS|MSR_DE@l
742 ori r7,r7,switch_as@l
749 /* L1 DCache is used for initial RAM */
751 /* Allocate Initial RAM in data cache.
753 lis r3,CONFIG_SYS_INIT_RAM_ADDR@h
754 ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l
757 /* cache size * 1024 / (2 * L1 line size) */
758 slwi r2, r2, (10 - 1 - L1_CACHE_SHIFT)
764 addi r3,r3,CONFIG_SYS_CACHELINE_SIZE
767 /* Jump out the last 4K page and continue to 'normal' start */
768 #ifdef CONFIG_SYS_RAMBOOT
771 /* Calculate absolute address in FLASH and jump there */
772 /*--------------------------------------------------------------*/
773 lis r3,CONFIG_SYS_MONITOR_BASE@h
774 ori r3,r3,CONFIG_SYS_MONITOR_BASE@l
775 addi r3,r3,_start_cont - _start + _START_OFFSET
783 .long 0x27051956 /* U-BOOT Magic Number */
784 .globl version_string
786 .ascii U_BOOT_VERSION_STRING, "\0"
791 /* Setup the stack in initial RAM,could be L2-as-SRAM or L1 dcache*/
792 lis r1,CONFIG_SYS_INIT_RAM_ADDR@h
793 ori r1,r1,CONFIG_SYS_INIT_SP_OFFSET@l
797 stwu r0,-4(r1) /* Terminate call chain */
799 stwu r1,-8(r1) /* Save back chain and move SP */
800 lis r0,RESET_VECTOR@h /* Address of reset vector */
801 ori r0,r0,RESET_VECTOR@l
802 stwu r1,-8(r1) /* Save back chain and move SP */
803 stw r0,+12(r1) /* Save return addr (underflow vect) */
808 /* switch back to AS = 0 */
809 lis r3,(MSR_CE|MSR_ME|MSR_DE)@h
810 ori r3,r3,(MSR_CE|MSR_ME|MSR_DE)@l
818 /* NOTREACHED - board_init_f() does not return */
820 #ifndef CONFIG_NAND_SPL
821 . = EXC_OFF_SYS_RESET
822 .globl _start_of_vectors
825 /* Critical input. */
826 CRIT_EXCEPTION(0x0100, CriticalInput, CritcalInputException)
829 MCK_EXCEPTION(0x200, MachineCheck, MachineCheckException)
831 /* Data Storage exception. */
832 STD_EXCEPTION(0x0300, DataStorage, UnknownException)
834 /* Instruction Storage exception. */
835 STD_EXCEPTION(0x0400, InstStorage, UnknownException)
837 /* External Interrupt exception. */
838 STD_EXCEPTION(0x0500, ExtInterrupt, ExtIntException)
840 /* Alignment exception. */
843 EXCEPTION_PROLOG(SRR0, SRR1)
848 addi r3,r1,STACK_FRAME_OVERHEAD
849 EXC_XFER_TEMPLATE(Alignment, AlignmentException, MSR_KERNEL, COPY_EE)
851 /* Program check exception */
854 EXCEPTION_PROLOG(SRR0, SRR1)
855 addi r3,r1,STACK_FRAME_OVERHEAD
856 EXC_XFER_TEMPLATE(ProgramCheck, ProgramCheckException,
859 /* No FPU on MPC85xx. This exception is not supposed to happen.
861 STD_EXCEPTION(0x0800, FPUnavailable, UnknownException)
865 * r0 - SYSCALL number
869 addis r11,r0,0 /* get functions table addr */
870 ori r11,r11,0 /* Note: this code is patched in trap_init */
871 addis r12,r0,0 /* get number of functions */
877 rlwinm r0,r0,2,0,31 /* fn_addr = fn_tbl[r0] */
881 li r20,0xd00-4 /* Get stack pointer */
883 subi r12,r12,12 /* Adjust stack pointer */
884 li r0,0xc00+_end_back-SystemCall
885 cmplw 0,r0,r12 /* Check stack overflow */
896 li r12,0xc00+_back-SystemCall
904 mfmsr r11 /* Disable interrupts */
908 SYNC /* Some chip revs need this... */
912 li r12,0xd00-4 /* restore regs */
922 addi r12,r12,12 /* Adjust stack pointer */
930 STD_EXCEPTION(0x0a00, Decrementer, timer_interrupt)
931 STD_EXCEPTION(0x0b00, IntervalTimer, UnknownException)
932 STD_EXCEPTION(0x0c00, WatchdogTimer, UnknownException)
934 STD_EXCEPTION(0x0d00, DataTLBError, UnknownException)
935 STD_EXCEPTION(0x0e00, InstructionTLBError, UnknownException)
937 CRIT_EXCEPTION(0x0f00, DebugBreakpoint, DebugException )
939 .globl _end_of_vectors
943 . = . + (0x100 - ( . & 0xff )) /* align for debug */
946 * This code finishes saving the registers to the exception frame
947 * and jumps to the appropriate handler for the exception.
948 * Register r21 is pointer into trap frame, r1 has new stack pointer.
950 .globl transfer_to_handler
962 andi. r24,r23,0x3f00 /* get vector offset */
966 mtspr SPRG2,r22 /* r1 is now kernel sp */
968 lwz r24,0(r23) /* virtual address of handler */
969 lwz r23,4(r23) /* where to go when done */
974 rfi /* jump to handler, enable MMU */
977 mfmsr r28 /* Disable interrupts */
981 SYNC /* Some chip revs need this... */
996 lwz r2,_NIP(r1) /* Restore environment */
1007 mfmsr r28 /* Disable interrupts */
1011 SYNC /* Some chip revs need this... */
1026 lwz r2,_NIP(r1) /* Restore environment */
1037 mfmsr r28 /* Disable interrupts */
1041 SYNC /* Some chip revs need this... */
1056 lwz r2,_NIP(r1) /* Restore environment */
1058 mtspr SPRN_MCSRR0,r2
1059 mtspr SPRN_MCSRR1,r0
1070 .globl invalidate_icache
1073 ori r0,r0,L1CSR1_ICFI
1078 blr /* entire I cache */
1080 .globl invalidate_dcache
1083 ori r0,r0,L1CSR0_DCFI
1090 .globl icache_enable
1093 bl invalidate_icache
1103 .globl icache_disable
1107 ori r3,r3,L1CSR1_ICE
1113 .globl icache_status
1116 andi. r3,r3,L1CSR1_ICE
1119 .globl dcache_enable
1122 bl invalidate_dcache
1134 .globl dcache_disable
1138 ori r4,r4,L1CSR0_DCE
1144 .globl dcache_status
1147 andi. r3,r3,L1CSR0_DCE
1170 /*------------------------------------------------------------------------------- */
1172 /* Description: Input 8 bits */
1173 /*------------------------------------------------------------------------------- */
1179 /*------------------------------------------------------------------------------- */
1180 /* Function: out8 */
1181 /* Description: Output 8 bits */
1182 /*------------------------------------------------------------------------------- */
1189 /*------------------------------------------------------------------------------- */
1190 /* Function: out16 */
1191 /* Description: Output 16 bits */
1192 /*------------------------------------------------------------------------------- */
1199 /*------------------------------------------------------------------------------- */
1200 /* Function: out16r */
1201 /* Description: Byte reverse and output 16 bits */
1202 /*------------------------------------------------------------------------------- */
1209 /*------------------------------------------------------------------------------- */
1210 /* Function: out32 */
1211 /* Description: Output 32 bits */
1212 /*------------------------------------------------------------------------------- */
1219 /*------------------------------------------------------------------------------- */
1220 /* Function: out32r */
1221 /* Description: Byte reverse and output 32 bits */
1222 /*------------------------------------------------------------------------------- */
1229 /*------------------------------------------------------------------------------- */
1230 /* Function: in16 */
1231 /* Description: Input 16 bits */
1232 /*------------------------------------------------------------------------------- */
1238 /*------------------------------------------------------------------------------- */
1239 /* Function: in16r */
1240 /* Description: Input 16 bits and byte reverse */
1241 /*------------------------------------------------------------------------------- */
1247 /*------------------------------------------------------------------------------- */
1248 /* Function: in32 */
1249 /* Description: Input 32 bits */
1250 /*------------------------------------------------------------------------------- */
1256 /*------------------------------------------------------------------------------- */
1257 /* Function: in32r */
1258 /* Description: Input 32 bits and byte reverse */
1259 /*------------------------------------------------------------------------------- */
1264 #endif /* !CONFIG_NAND_SPL */
1266 /*------------------------------------------------------------------------------*/
1269 * void write_tlb(mas0, mas1, mas2, mas3, mas7)
1277 #ifdef CONFIG_ENABLE_36BIT_PHYS
1281 #ifdef CONFIG_SYS_BOOK3E_HV
1291 * void relocate_code (addr_sp, gd, addr_moni)
1293 * This "function" does not return, instead it continues in RAM
1294 * after relocating the monitor code.
1298 * r5 = length in bytes
1299 * r6 = cachelinesize
1301 .globl relocate_code
1303 mr r1,r3 /* Set new stack pointer */
1304 mr r9,r4 /* Save copy of Init Data pointer */
1305 mr r10,r5 /* Save copy of Destination Address */
1308 mr r3,r5 /* Destination Address */
1309 lis r4,CONFIG_SYS_MONITOR_BASE@h /* Source Address */
1310 ori r4,r4,CONFIG_SYS_MONITOR_BASE@l
1311 lwz r5,GOT(__init_end)
1313 li r6,CONFIG_SYS_CACHELINE_SIZE /* Cache Line Size */
1318 * New GOT-PTR = (old GOT-PTR - CONFIG_SYS_MONITOR_BASE) + Destination Address
1324 /* First our own GOT */
1326 /* the the one used by the C code */
1336 beq cr1,4f /* In place copy is not necessary */
1337 beq 7f /* Protect against 0 count */
1356 * Now flush the cache: note that we must start from a cache aligned
1357 * address. Otherwise we might miss one cache line.
1361 beq 7f /* Always flush prefetch queue in any case */
1369 sync /* Wait for all dcbst to complete on bus */
1375 7: sync /* Wait for all icbi to complete on bus */
1379 * Re-point the IVPR at RAM
1384 * We are done. Do not return, instead branch to second part of board
1385 * initialization, now running from RAM.
1388 addi r0,r10,in_ram - _start + _START_OFFSET
1390 blr /* NEVER RETURNS! */
1395 * Relocation Function, r12 point to got2+0x8000
1397 * Adjust got2 pointers, no need to check for 0, this code
1398 * already puts a few entries in the table.
1400 li r0,__got2_entries@sectoff@l
1401 la r3,GOT(_GOT2_TABLE_)
1402 lwz r11,GOT(_GOT2_TABLE_)
1414 * Now adjust the fixups and the pointers to the fixups
1415 * in case we need to move ourselves again.
1417 li r0,__fixup_entries@sectoff@l
1418 lwz r3,GOT(_FIXUP_TABLE_)
1434 * Now clear BSS segment
1436 lwz r3,GOT(__bss_start)
1437 lwz r4,GOT(__bss_end__)
1450 mr r3,r9 /* Init Data pointer */
1451 mr r4,r10 /* Destination Address */
1454 #ifndef CONFIG_NAND_SPL
1456 * Copy exception vector code to low memory
1459 * r7: source address, r8: end address, r9: target address
1463 mflr r4 /* save link register */
1465 lwz r7,GOT(_start_of_vectors)
1466 lwz r8,GOT(_end_of_vectors)
1468 li r9,0x100 /* reset vector always at 0x100 */
1471 bgelr /* return if r7>=r8 - just in case */
1481 * relocate `hdlr' and `int_return' entries
1483 li r7,.L_CriticalInput - _start + _START_OFFSET
1485 li r7,.L_MachineCheck - _start + _START_OFFSET
1487 li r7,.L_DataStorage - _start + _START_OFFSET
1489 li r7,.L_InstStorage - _start + _START_OFFSET
1491 li r7,.L_ExtInterrupt - _start + _START_OFFSET
1493 li r7,.L_Alignment - _start + _START_OFFSET
1495 li r7,.L_ProgramCheck - _start + _START_OFFSET
1497 li r7,.L_FPUnavailable - _start + _START_OFFSET
1499 li r7,.L_Decrementer - _start + _START_OFFSET
1501 li r7,.L_IntervalTimer - _start + _START_OFFSET
1502 li r8,_end_of_vectors - _start + _START_OFFSET
1505 addi r7,r7,0x100 /* next exception vector */
1509 /* Update IVORs as per relocated vector table address */
1511 mtspr IVOR0,r7 /* 0: Critical input */
1513 mtspr IVOR1,r7 /* 1: Machine check */
1515 mtspr IVOR2,r7 /* 2: Data storage */
1517 mtspr IVOR3,r7 /* 3: Instruction storage */
1519 mtspr IVOR4,r7 /* 4: External interrupt */
1521 mtspr IVOR5,r7 /* 5: Alignment */
1523 mtspr IVOR6,r7 /* 6: Program check */
1525 mtspr IVOR7,r7 /* 7: floating point unavailable */
1527 mtspr IVOR8,r7 /* 8: System call */
1528 /* 9: Auxiliary processor unavailable(unsupported) */
1530 mtspr IVOR10,r7 /* 10: Decrementer */
1532 mtspr IVOR11,r7 /* 11: Interval timer */
1534 mtspr IVOR12,r7 /* 12: Watchdog timer */
1536 mtspr IVOR13,r7 /* 13: Data TLB error */
1538 mtspr IVOR14,r7 /* 14: Instruction TLB error */
1540 mtspr IVOR15,r7 /* 15: Debug */
1545 mtlr r4 /* restore link register */
1548 .globl unlock_ram_in_cache
1549 unlock_ram_in_cache:
1550 /* invalidate the INIT_RAM section */
1551 lis r3,(CONFIG_SYS_INIT_RAM_ADDR & ~(CONFIG_SYS_CACHELINE_SIZE-1))@h
1552 ori r3,r3,(CONFIG_SYS_INIT_RAM_ADDR & ~(CONFIG_SYS_CACHELINE_SIZE-1))@l
1555 slwi r4,r4,(10 - 1 - L1_CACHE_SHIFT)
1558 addi r3,r3,CONFIG_SYS_CACHELINE_SIZE
1562 /* Invalidate the TLB entries for the cache */
1563 lis r3,CONFIG_SYS_INIT_RAM_ADDR@h
1564 ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l
1577 mfspr r3,SPRN_L1CFG0
1579 rlwinm r5,r3,9,3 /* Extract cache block size */
1580 twlgti r5,1 /* Only 32 and 64 byte cache blocks
1581 * are currently defined.
1584 subfic r6,r5,2 /* r6 = log2(1KiB / cache block size) -
1585 * log2(number of ways)
1587 slw r5,r4,r5 /* r5 = cache block size */
1589 rlwinm r7,r3,0,0xff /* Extract number of KiB in the cache */
1590 mulli r7,r7,13 /* An 8-way cache will require 13
1595 /* save off HID0 and set DCFA */
1597 ori r9,r8,HID0_DCFA@l
1604 1: lwz r3,0(r4) /* Load... */
1612 1: dcbf 0,r4 /* ...and flush. */
1625 #include "fixed_ivor.S"
1627 #endif /* !CONFIG_NAND_SPL */