2 * Copyright 2004, 2007-2012 Freescale Semiconductor, Inc.
3 * Copyright (C) 2003 Motorola,Inc.
5 * SPDX-License-Identifier: GPL-2.0+
8 /* U-Boot Startup Code for Motorola 85xx PowerPC based Embedded Boards
10 * The processor starts at 0xfffffffc and the code is first executed in the
11 * last 4K page(0xfffff000-0xffffffff) in flash/rom.
15 #include <asm-offsets.h>
20 #include <ppc_asm.tmpl>
23 #include <asm/cache.h>
27 #define MSR_KERNEL ( MSR_ME ) /* Machine Check */
29 #define LAW_EN 0x80000000
31 #if defined(CONFIG_NAND_SPL) || \
32 (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_INIT_MINIMAL))
36 #if !defined(CONFIG_SPL) && !defined(CONFIG_SYS_RAMBOOT) && \
37 !defined(CONFIG_SECURE_BOOT) && !defined(CONFIG_SRIO_PCIE_BOOT_SLAVE)
42 * Set up GOT: Global Offset Table
44 * Use r12 to access the GOT
47 GOT_ENTRY(_GOT2_TABLE_)
48 GOT_ENTRY(_FIXUP_TABLE_)
52 GOT_ENTRY(_start_of_vectors)
53 GOT_ENTRY(_end_of_vectors)
54 GOT_ENTRY(transfer_to_handler)
59 GOT_ENTRY(__bss_start)
63 * e500 Startup -- after reset only the last 4KB of the effective
64 * address space is mapped in the MMU L2 TLB1 Entry0. The .bootpg
65 * section is located at THIS LAST page and basically does three
66 * things: clear some registers, set up exception tables and
67 * add more TLB entries for 'larger spaces'(e.g. the boot rom) to
68 * continue the boot procedure.
70 * Once the boot rom is mapped by TLB entries we can proceed
71 * with normal startup.
79 /* Enable debug exception */
84 * If we got an ePAPR device tree pointer passed in as r3, we need that
85 * later in cpu_init_early_f(). Save it to a safe register before we
86 * clobber it so that we can fetch it from there later.
90 #ifdef CONFIG_SYS_FSL_ERRATUM_A004510
93 li r4,CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV
97 #ifdef CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV2
98 li r4,CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV2
103 /* Not a supported revision affected by erratum */
107 1: li r27,1 /* Remember for later that we have the erratum */
108 /* Erratum says set bits 55:60 to 001001 */
118 #ifdef CONFIG_SYS_FSL_ERRATUM_A005125
121 mfspr r3, SPRN_HDBCR0
123 mtspr SPRN_HDBCR0, r3
127 #if defined(CONFIG_SECURE_BOOT) && defined(CONFIG_E500MC) && \
128 !defined(CONFIG_E6500)
129 /* ISBC uses L2 as stack.
130 * Disable L2 cache here so that u-boot can enable it later
131 * as part of it's normal flow
134 /* Check if L2 is enabled */
135 mfspr r3, SPRN_L2CSR0
137 ori r2, r2, L2CSR0_L2E@l
141 mfspr r3, SPRN_L2CSR0
143 lis r2,(L2CSR0_L2FL)@h
144 ori r2, r2, (L2CSR0_L2FL)@l
151 mfspr r3, SPRN_L2CSR0
155 mfspr r3, SPRN_L2CSR0
157 ori r2, r2, L2CSR0_L2E@l
167 /* clear registers/arrays not reset by hardware */
171 mtspr L1CSR0,r0 /* invalidate d-cache */
172 mtspr L1CSR1,r0 /* invalidate i-cache */
175 mtspr DBSR,r1 /* Clear all valid bits */
178 .macro create_tlb1_entry esel ts tsize epn wimg rpn perm phy_high scratch
179 lis \scratch, FSL_BOOKE_MAS0(1, \esel, 0)@h
180 ori \scratch, \scratch, FSL_BOOKE_MAS0(1, \esel, 0)@l
182 lis \scratch, FSL_BOOKE_MAS1(1, 1, 0, \ts, \tsize)@h
183 ori \scratch, \scratch, FSL_BOOKE_MAS1(1, 1, 0, \ts, \tsize)@l
185 lis \scratch, FSL_BOOKE_MAS2(\epn, \wimg)@h
186 ori \scratch, \scratch, FSL_BOOKE_MAS2(\epn, \wimg)@l
188 lis \scratch, FSL_BOOKE_MAS3(\rpn, 0, \perm)@h
189 ori \scratch, \scratch, FSL_BOOKE_MAS3(\rpn, 0, \perm)@l
191 lis \scratch, \phy_high@h
192 ori \scratch, \scratch, \phy_high@l
200 .macro create_tlb0_entry esel ts tsize epn wimg rpn perm phy_high scratch
201 lis \scratch, FSL_BOOKE_MAS0(0, \esel, 0)@h
202 ori \scratch, \scratch, FSL_BOOKE_MAS0(0, \esel, 0)@l
204 lis \scratch, FSL_BOOKE_MAS1(1, 0, 0, \ts, \tsize)@h
205 ori \scratch, \scratch, FSL_BOOKE_MAS1(1, 0, 0, \ts, \tsize)@l
207 lis \scratch, FSL_BOOKE_MAS2(\epn, \wimg)@h
208 ori \scratch, \scratch, FSL_BOOKE_MAS2(\epn, \wimg)@l
210 lis \scratch, FSL_BOOKE_MAS3(\rpn, 0, \perm)@h
211 ori \scratch, \scratch, FSL_BOOKE_MAS3(\rpn, 0, \perm)@l
213 lis \scratch, \phy_high@h
214 ori \scratch, \scratch, \phy_high@l
222 .macro delete_tlb1_entry esel scratch
223 lis \scratch, FSL_BOOKE_MAS0(1, \esel, 0)@h
224 ori \scratch, \scratch, FSL_BOOKE_MAS0(1, \esel, 0)@l
234 .macro delete_tlb0_entry esel epn wimg scratch
235 lis \scratch, FSL_BOOKE_MAS0(0, \esel, 0)@h
236 ori \scratch, \scratch, FSL_BOOKE_MAS0(0, \esel, 0)@l
240 lis \scratch, FSL_BOOKE_MAS2(\epn, \wimg)@h
241 ori \scratch, \scratch, FSL_BOOKE_MAS2(\epn, \wimg)@l
249 /* Interrupt vectors do not fit in minimal SPL. */
250 #if !defined(MINIMAL_SPL)
251 /* Setup interrupt vectors */
252 lis r1,CONFIG_SYS_MONITOR_BASE@h
255 lis r3,(CONFIG_SYS_MONITOR_BASE & 0xffff)@h
256 ori r3,r3,(CONFIG_SYS_MONITOR_BASE & 0xffff)@l
258 addi r4,r3,CriticalInput - _start + _START_OFFSET
259 mtspr IVOR0,r4 /* 0: Critical input */
260 addi r4,r3,MachineCheck - _start + _START_OFFSET
261 mtspr IVOR1,r4 /* 1: Machine check */
262 addi r4,r3,DataStorage - _start + _START_OFFSET
263 mtspr IVOR2,r4 /* 2: Data storage */
264 addi r4,r3,InstStorage - _start + _START_OFFSET
265 mtspr IVOR3,r4 /* 3: Instruction storage */
266 addi r4,r3,ExtInterrupt - _start + _START_OFFSET
267 mtspr IVOR4,r4 /* 4: External interrupt */
268 addi r4,r3,Alignment - _start + _START_OFFSET
269 mtspr IVOR5,r4 /* 5: Alignment */
270 addi r4,r3,ProgramCheck - _start + _START_OFFSET
271 mtspr IVOR6,r4 /* 6: Program check */
272 addi r4,r3,FPUnavailable - _start + _START_OFFSET
273 mtspr IVOR7,r4 /* 7: floating point unavailable */
274 addi r4,r3,SystemCall - _start + _START_OFFSET
275 mtspr IVOR8,r4 /* 8: System call */
276 /* 9: Auxiliary processor unavailable(unsupported) */
277 addi r4,r3,Decrementer - _start + _START_OFFSET
278 mtspr IVOR10,r4 /* 10: Decrementer */
279 addi r4,r3,IntervalTimer - _start + _START_OFFSET
280 mtspr IVOR11,r4 /* 11: Interval timer */
281 addi r4,r3,WatchdogTimer - _start + _START_OFFSET
282 mtspr IVOR12,r4 /* 12: Watchdog timer */
283 addi r4,r3,DataTLBError - _start + _START_OFFSET
284 mtspr IVOR13,r4 /* 13: Data TLB error */
285 addi r4,r3,InstructionTLBError - _start + _START_OFFSET
286 mtspr IVOR14,r4 /* 14: Instruction TLB error */
287 addi r4,r3,DebugBreakpoint - _start + _START_OFFSET
288 mtspr IVOR15,r4 /* 15: Debug */
291 /* Clear and set up some registers. */
294 mtspr DEC,r0 /* prevent dec exceptions */
295 mttbl r0 /* prevent fit & wdt exceptions */
297 mtspr TSR,r1 /* clear all timer exception status */
298 mtspr TCR,r0 /* disable all */
299 mtspr ESR,r0 /* clear exception syndrome register */
300 mtspr MCSR,r0 /* machine check syndrome register */
301 mtxer r0 /* clear integer exception register */
303 #ifdef CONFIG_SYS_BOOK3E_HV
304 mtspr MAS8,r0 /* make sure MAS8 is clear */
307 /* Enable Time Base and Select Time Base Clock */
308 lis r0,HID0_EMCP@h /* Enable machine check */
309 #if defined(CONFIG_ENABLE_36BIT_PHYS)
310 ori r0,r0,HID0_ENMAS7@l /* Enable MAS7 */
312 #ifndef CONFIG_E500MC
313 ori r0,r0,HID0_TBEN@l /* Enable Timebase */
317 #if !defined(CONFIG_E500MC) && !defined(CONFIG_QEMU_E500)
318 li r0,(HID1_ASTME|HID1_ABE)@l /* Addr streaming & broadcast */
321 cmpwi r3,0x50@l /* if we are rev 5.0 or greater set MBDD */
323 /* Set MBDD bit also */
324 ori r0, r0, HID1_MBDD@l
329 #ifdef CONFIG_SYS_FSL_ERRATUM_CPU_A003999
335 /* Enable Branch Prediction */
336 #if defined(CONFIG_BTB)
337 lis r0,BUCSR_ENABLE@h
338 ori r0,r0,BUCSR_ENABLE@l
342 #if defined(CONFIG_SYS_INIT_DBCR)
345 mtspr DBSR,r1 /* Clear all status bits */
346 lis r0,CONFIG_SYS_INIT_DBCR@h /* DBCR0[IDM] must be set */
347 ori r0,r0,CONFIG_SYS_INIT_DBCR@l
351 #ifdef CONFIG_MPC8569
352 #define CONFIG_SYS_LBC_ADDR (CONFIG_SYS_CCSRBAR_DEFAULT + 0x5000)
353 #define CONFIG_SYS_LBCR_ADDR (CONFIG_SYS_LBC_ADDR + 0xd0)
355 /* MPC8569 Rev.0 silcon needs to set bit 13 of LBCR to allow elBC to
356 * use address space which is more than 12bits, and it must be done in
357 * the 4K boot page. So we set this bit here.
360 /* create a temp mapping TLB0[0] for LBCR */
361 create_tlb0_entry 0, \
362 0, BOOKE_PAGESZ_4K, \
363 CONFIG_SYS_LBC_ADDR, MAS2_I|MAS2_G, \
364 CONFIG_SYS_LBC_ADDR, MAS3_SW|MAS3_SR, \
367 /* Set LBCR register */
368 lis r4,CONFIG_SYS_LBCR_ADDR@h
369 ori r4,r4,CONFIG_SYS_LBCR_ADDR@l
371 lis r5,CONFIG_SYS_LBC_LBCR@h
372 ori r5,r5,CONFIG_SYS_LBC_LBCR@l
376 /* invalidate this temp TLB */
377 lis r4,CONFIG_SYS_LBC_ADDR@h
378 ori r4,r4,CONFIG_SYS_LBC_ADDR@l
382 #endif /* CONFIG_MPC8569 */
385 * Search for the TLB that covers the code we're executing, and shrink it
386 * so that it covers only this 4K page. That will ensure that any other
387 * TLB we create won't interfere with it. We assume that the TLB exists,
388 * which is why we don't check the Valid bit of MAS1. We also assume
391 * This is necessary, for example, when booting from the on-chip ROM,
392 * which (oddly) creates a single 4GB TLB that covers CCSR and DDR.
394 bl nexti /* Find our address */
395 nexti: mflr r1 /* R1 = our PC */
397 mtspr MAS6, r2 /* Assume the current PID and AS are 0 */
400 tlbsx 0, r1 /* This must succeed */
402 mfspr r14, MAS0 /* Save ESEL for later */
403 rlwinm r14, r14, 16, 0xfff
405 /* Set the size of the TLB to 4KB */
408 andc r3, r3, r2 /* Clear the TSIZE bits */
409 ori r3, r3, MAS1_TSIZE(BOOKE_PAGESZ_4K)@l
410 oris r3, r3, MAS1_IPROT@h
414 * Set the base address of the TLB to our PC. We assume that
415 * virtual == physical. We also assume that MAS2_EPN == MAS3_RPN.
418 ori r3, r3, MAS2_EPN@l /* R3 = MAS2_EPN */
420 and r1, r1, r3 /* Our PC, rounded down to the nearest page */
425 #ifdef CONFIG_SYS_FSL_ERRATUM_A004510
428 andi. r15, r2, MAS2_I|MAS2_G /* save the old I/G for later */
429 rlwinm r2, r2, 0, ~MAS2_I
433 mtspr MAS2, r2 /* Set the EPN to our PC base address */
438 mtspr MAS3, r2 /* Set the RPN to our PC base address */
445 * Clear out any other TLB entries that may exist, to avoid conflicts.
446 * Our TLB entry is in r14.
448 li r0, TLBIVAX_ALL | TLBIVAX_TLB0
452 mfspr r4, SPRN_TLB1CFG
453 rlwinm r4, r4, 0, TLBnCFG_NENTRY_MASK
458 rlwinm r5, r3, 16, MAS0_ESEL_MSK
460 beq 2f /* skip the entry we're executing from */
462 oris r5, r5, MAS0_TLBSEL(1)@h
473 #if defined(CONFIG_SYS_PPC_E500_DEBUG_TLB) && !defined(MINIMAL_SPL) && \
474 !defined(CONFIG_SECURE_BOOT)
476 * TLB entry for debuggging in AS1
477 * Create temporary TLB entry in AS0 to handle debug exception
478 * As on debug exception MSR is cleared i.e. Address space is changed
479 * to 0. A TLB entry (in AS0) is required to handle debug exception generated
485 * TLB entry is created for IVPR + IVOR15 to map on valid OP code address
486 * bacause flash's virtual address maps to 0xff800000 - 0xffffffff.
487 * and this window is outside of 4K boot window.
489 create_tlb1_entry CONFIG_SYS_PPC_E500_DEBUG_TLB, \
490 0, BOOKE_PAGESZ_4M, \
491 CONFIG_SYS_MONITOR_BASE & 0xffc00000, MAS2_I|MAS2_G, \
492 0xffc00000, MAS3_SX|MAS3_SW|MAS3_SR, \
497 * TLB entry is created for IVPR + IVOR15 to map on valid OP code address
498 * because "nexti" will resize TLB to 4K
500 create_tlb1_entry CONFIG_SYS_PPC_E500_DEBUG_TLB, \
501 0, BOOKE_PAGESZ_256K, \
502 CONFIG_SYS_MONITOR_BASE & 0xfffc0000, MAS2_I, \
503 CONFIG_SYS_MONITOR_BASE & 0xfffc0000, MAS3_SX|MAS3_SW|MAS3_SR, \
509 * Relocate CCSR, if necessary. We relocate CCSR if (obviously) the default
510 * location is not where we want it. This typically happens on a 36-bit
511 * system, where we want to move CCSR to near the top of 36-bit address space.
513 * To move CCSR, we create two temporary TLBs, one for the old location, and
514 * another for the new location. On CoreNet systems, we also need to create
515 * a special, temporary LAW.
517 * As a general rule, TLB0 is used for short-term TLBs, and TLB1 is used for
518 * long-term TLBs, so we use TLB0 here.
520 #if (CONFIG_SYS_CCSRBAR_DEFAULT != CONFIG_SYS_CCSRBAR_PHYS)
522 #if !defined(CONFIG_SYS_CCSRBAR_PHYS_HIGH) || !defined(CONFIG_SYS_CCSRBAR_PHYS_LOW)
523 #error "CONFIG_SYS_CCSRBAR_PHYS_HIGH and CONFIG_SYS_CCSRBAR_PHYS_LOW) must be defined."
528 * Create a TLB for the new location of CCSR. Register R8 is reserved
529 * for the virtual address of this TLB (CONFIG_SYS_CCSRBAR).
531 lis r8, CONFIG_SYS_CCSRBAR@h
532 ori r8, r8, CONFIG_SYS_CCSRBAR@l
533 lis r9, (CONFIG_SYS_CCSRBAR + 0x1000)@h
534 ori r9, r9, (CONFIG_SYS_CCSRBAR + 0x1000)@l
535 create_tlb0_entry 0, \
536 0, BOOKE_PAGESZ_4K, \
537 CONFIG_SYS_CCSRBAR, MAS2_I|MAS2_G, \
538 CONFIG_SYS_CCSRBAR_PHYS_LOW, MAS3_SW|MAS3_SR, \
539 CONFIG_SYS_CCSRBAR_PHYS_HIGH, r3
541 * Create a TLB for the current location of CCSR. Register R9 is reserved
542 * for the virtual address of this TLB (CONFIG_SYS_CCSRBAR + 0x1000).
545 create_tlb0_entry 1, \
546 0, BOOKE_PAGESZ_4K, \
547 CONFIG_SYS_CCSRBAR + 0x1000, MAS2_I|MAS2_G, \
548 CONFIG_SYS_CCSRBAR_DEFAULT, MAS3_SW|MAS3_SR, \
549 0, r3 /* The default CCSR address is always a 32-bit number */
553 * We have a TLB for what we think is the current (old) CCSR. Let's
554 * verify that, otherwise we won't be able to move it.
555 * CONFIG_SYS_CCSRBAR_DEFAULT is always a 32-bit number, so we only
556 * need to compare the lower 32 bits of CCSRBAR on CoreNet systems.
559 lis r0, CONFIG_SYS_CCSRBAR_DEFAULT@h
560 ori r0, r0, CONFIG_SYS_CCSRBAR_DEFAULT@l
561 #ifdef CONFIG_FSL_CORENET
562 lwz r1, 4(r9) /* CCSRBARL */
564 lwz r1, 0(r9) /* CCSRBAR, shifted right by 12 */
571 * If the value we read from CCSRBARL is not what we expect, then
572 * enter an infinite loop. This will at least allow a debugger to
573 * halt execution and examine TLBs, etc. There's no point in going
577 bne infinite_debug_loop
579 #ifdef CONFIG_FSL_CORENET
581 #define CCSR_LAWBARH0 (CONFIG_SYS_CCSRBAR + 0x1000)
582 #define LAW_SIZE_4K 0xb
583 #define CCSRBAR_LAWAR (LAW_EN | (0x1e << 20) | LAW_SIZE_4K)
584 #define CCSRAR_C 0x80000000 /* Commit */
588 * On CoreNet systems, we create the temporary LAW using a special LAW
589 * target ID of 0x1e. LAWBARH is at offset 0xc00 in CCSR.
591 lis r0, CONFIG_SYS_CCSRBAR_PHYS_HIGH@h
592 ori r0, r0, CONFIG_SYS_CCSRBAR_PHYS_HIGH@l
593 lis r1, CONFIG_SYS_CCSRBAR_PHYS_LOW@h
594 ori r1, r1, CONFIG_SYS_CCSRBAR_PHYS_LOW@l
595 lis r2, CCSRBAR_LAWAR@h
596 ori r2, r2, CCSRBAR_LAWAR@l
598 stw r0, 0xc00(r9) /* LAWBARH0 */
599 stw r1, 0xc04(r9) /* LAWBARL0 */
601 stw r2, 0xc08(r9) /* LAWAR0 */
604 * Read back from LAWAR to ensure the update is complete. e500mc
605 * cores also require an isync.
607 lwz r0, 0xc08(r9) /* LAWAR0 */
611 * Read the current CCSRBARH and CCSRBARL using load word instructions.
612 * Follow this with an isync instruction. This forces any outstanding
613 * accesses to configuration space to completion.
616 lwz r0, 0(r9) /* CCSRBARH */
617 lwz r0, 4(r9) /* CCSRBARL */
621 * Write the new values for CCSRBARH and CCSRBARL to their old
622 * locations. The CCSRBARH has a shadow register. When the CCSRBARH
623 * has a new value written it loads a CCSRBARH shadow register. When
624 * the CCSRBARL is written, the CCSRBARH shadow register contents
625 * along with the CCSRBARL value are loaded into the CCSRBARH and
626 * CCSRBARL registers, respectively. Follow this with a sync
630 lis r0, CONFIG_SYS_CCSRBAR_PHYS_HIGH@h
631 ori r0, r0, CONFIG_SYS_CCSRBAR_PHYS_HIGH@l
632 lis r1, CONFIG_SYS_CCSRBAR_PHYS_LOW@h
633 ori r1, r1, CONFIG_SYS_CCSRBAR_PHYS_LOW@l
635 ori r2, r2, CCSRAR_C@l
637 stw r0, 0(r9) /* Write to CCSRBARH */
638 sync /* Make sure we write to CCSRBARH first */
639 stw r1, 4(r9) /* Write to CCSRBARL */
643 * Write a 1 to the commit bit (C) of CCSRAR at the old location.
644 * Follow this with a sync instruction.
649 /* Delete the temporary LAW */
658 #else /* #ifdef CONFIG_FSL_CORENET */
662 * Read the current value of CCSRBAR using a load word instruction
663 * followed by an isync. This forces all accesses to configuration
670 /* CONFIG_SYS_CCSRBAR_PHYS right shifted by 12 */
671 #define CCSRBAR_PHYS_RS12 ((CONFIG_SYS_CCSRBAR_PHYS_HIGH << 20) | \
672 (CONFIG_SYS_CCSRBAR_PHYS_LOW >> 12))
674 /* Write the new value to CCSRBAR. */
675 lis r0, CCSRBAR_PHYS_RS12@h
676 ori r0, r0, CCSRBAR_PHYS_RS12@l
681 * The manual says to perform a load of an address that does not
682 * access configuration space or the on-chip SRAM using an existing TLB,
683 * but that doesn't appear to be necessary. We will do the isync,
689 * Read the contents of CCSRBAR from its new location, followed by
695 #endif /* #ifdef CONFIG_FSL_CORENET */
697 /* Delete the temporary TLBs */
699 delete_tlb0_entry 0, CONFIG_SYS_CCSRBAR, MAS2_I|MAS2_G, r3
700 delete_tlb0_entry 1, CONFIG_SYS_CCSRBAR + 0x1000, MAS2_I|MAS2_G, r3
702 #endif /* #if (CONFIG_SYS_CCSRBAR_DEFAULT != CONFIG_SYS_CCSRBAR_PHYS) */
704 #if defined(CONFIG_SYS_FSL_QORIQ_CHASSIS2) && defined(CONFIG_E6500)
707 * Create a TLB for the MMR location of CCSR
708 * to access L2CSR0 register
710 create_tlb0_entry 0, \
711 0, BOOKE_PAGESZ_4K, \
712 CONFIG_SYS_CCSRBAR + 0xC20000, MAS2_I|MAS2_G, \
713 CONFIG_SYS_CCSRBAR_PHYS_LOW + 0xC20000, MAS3_SW|MAS3_SR, \
714 CONFIG_SYS_CCSRBAR_PHYS_HIGH, r3
716 enable_l2_cluster_l2:
717 /* enable L2 cache */
718 lis r3, (CONFIG_SYS_CCSRBAR + 0xC20000)@h
719 ori r3, r3, (CONFIG_SYS_CCSRBAR + 0xC20000)@l
720 li r4, 33 /* stash id */
722 lis r4, (L2CSR0_L2FI|L2CSR0_L2LFC)@h
723 ori r4, r4, (L2CSR0_L2FI|L2CSR0_L2LFC)@l
725 stw r4, 0(r3) /* invalidate L2 */
732 lis r4, (L2CSR0_L2E|L2CSR0_L2PE)@h
733 ori r4, r4, (L2CSR0_L2REP_MODE)@l
735 stw r4, 0(r3) /* enable L2 */
737 delete_tlb0_entry 0, CONFIG_SYS_CCSRBAR + 0xC20000, MAS2_I|MAS2_G, r3
741 * Enable the L1. On e6500, this has to be done
742 * after the L2 is up.
745 #ifdef CONFIG_SYS_CACHE_STASHING
746 /* set stash id to (coreID) * 2 + 32 + L1 CT (0) */
751 /* Enable/invalidate the I-Cache */
752 lis r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@h
753 ori r2,r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@l
760 lis r3,(L1CSR1_CPE|L1CSR1_ICE)@h
761 ori r3,r3,(L1CSR1_CPE|L1CSR1_ICE)@l
766 andi. r1,r3,L1CSR1_ICE@l
769 /* Enable/invalidate the D-Cache */
770 lis r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@h
771 ori r2,r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@l
778 lis r3,(L1CSR0_CPE|L1CSR0_DCE)@h
779 ori r3,r3,(L1CSR0_CPE|L1CSR0_DCE)@l
784 andi. r1,r3,L1CSR0_DCE@l
786 #ifdef CONFIG_SYS_FSL_ERRATUM_A004510
787 #define DCSR_LAWBARH0 (CONFIG_SYS_CCSRBAR + 0x1000)
788 #define LAW_SIZE_1M 0x13
789 #define DCSRBAR_LAWAR (LAW_EN | (0x1d << 20) | LAW_SIZE_1M)
795 * Create a TLB entry for CCSR
797 * We're executing out of TLB1 entry in r14, and that's the only
798 * TLB entry that exists. To allocate some TLB entries for our
799 * own use, flip a bit high enough that we won't flip it again
804 lis r0, MAS0_TLBSEL(1)@h
805 rlwimi r0, r8, 16, MAS0_ESEL_MSK
806 lis r1, FSL_BOOKE_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_16M)@h
807 ori r1, r1, FSL_BOOKE_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_16M)@l
808 lis r7, CONFIG_SYS_CCSRBAR@h
809 ori r7, r7, CONFIG_SYS_CCSRBAR@l
810 ori r2, r7, MAS2_I|MAS2_G
811 lis r3, FSL_BOOKE_MAS3(CONFIG_SYS_CCSRBAR_PHYS_LOW, 0, (MAS3_SW|MAS3_SR))@h
812 ori r3, r3, FSL_BOOKE_MAS3(CONFIG_SYS_CCSRBAR_PHYS_LOW, 0, (MAS3_SW|MAS3_SR))@l
813 lis r4, CONFIG_SYS_CCSRBAR_PHYS_HIGH@h
814 ori r4, r4, CONFIG_SYS_CCSRBAR_PHYS_HIGH@l
825 /* Map DCSR temporarily to physical address zero */
827 lis r3, DCSRBAR_LAWAR@h
828 ori r3, r3, DCSRBAR_LAWAR@l
830 stw r0, 0xc00(r7) /* LAWBARH0 */
831 stw r0, 0xc04(r7) /* LAWBARL0 */
833 stw r3, 0xc08(r7) /* LAWAR0 */
835 /* Read back from LAWAR to ensure the update is complete. */
836 lwz r3, 0xc08(r7) /* LAWAR0 */
839 /* Create a TLB entry for DCSR at zero */
842 lis r0, MAS0_TLBSEL(1)@h
843 rlwimi r0, r9, 16, MAS0_ESEL_MSK
844 lis r1, FSL_BOOKE_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_1M)@h
845 ori r1, r1, FSL_BOOKE_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_1M)@l
846 li r6, 0 /* DCSR effective address */
847 ori r2, r6, MAS2_I|MAS2_G
848 li r3, MAS3_SW|MAS3_SR
860 /* enable the timebase */
861 #define CTBENR 0xe2084
863 addis r4, r7, CTBENR@ha
869 .macro erratum_set_ccsr offset value
870 addis r3, r7, \offset@ha
872 addi r3, r3, \offset@l
877 .macro erratum_set_dcsr offset value
878 addis r3, r6, \offset@ha
880 addi r3, r3, \offset@l
885 erratum_set_dcsr 0xb0e08 0xe0201800
886 erratum_set_dcsr 0xb0e18 0xe0201800
887 erratum_set_dcsr 0xb0e38 0xe0400000
888 erratum_set_dcsr 0xb0008 0x00900000
889 erratum_set_dcsr 0xb0e40 0xe00a0000
890 erratum_set_ccsr 0x18600 CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY
891 #ifdef CONFIG_RAMBOOT_PBL
892 erratum_set_ccsr 0x10f00 0x495e5000
894 erratum_set_ccsr 0x10f00 0x415e5000
896 erratum_set_ccsr 0x11f00 0x415e5000
898 /* Make temp mapping uncacheable again, if it was initially */
903 rlwimi r4, r15, 0, MAS2_I
904 rlwimi r4, r15, 0, MAS2_G
911 /* Clear the cache */
912 lis r3,(L1CSR1_ICFI|L1CSR1_ICLFR)@h
913 ori r3,r3,(L1CSR1_ICFI|L1CSR1_ICLFR)@l
923 lis r3,(L1CSR1_CPE|L1CSR1_ICE)@h
924 ori r3,r3,(L1CSR1_CPE|L1CSR1_ICE)@l
934 /* Remove temporary mappings */
935 lis r0, MAS0_TLBSEL(1)@h
936 rlwimi r0, r9, 16, MAS0_ESEL_MSK
946 stw r3, 0xc08(r7) /* LAWAR0 */
950 lis r0, MAS0_TLBSEL(1)@h
951 rlwimi r0, r8, 16, MAS0_ESEL_MSK
962 /* r3 = addr, r4 = value, clobbers r5, r11, r12 */
964 /* Lock two cache lines into I-Cache */
966 mfspr r11, SPRN_L1CSR1
967 rlwinm r11, r11, 0, ~L1CSR1_ICUL
970 mtspr SPRN_L1CSR1, r11
981 mfspr r11, SPRN_L1CSR1
982 3: andi. r11, r11, L1CSR1_ICUL
989 mfspr r11, SPRN_L1CSR1
990 3: andi. r11, r11, L1CSR1_ICUL
995 /* Inside a locked cacheline, wait a while, write, then wait a while */
999 addis r11, r5, 0x10000@h /* wait 65536 timebase ticks */
1000 4: mfspr r5, SPRN_TBRL
1007 addis r11, r5, 0x10000@h /* wait 65536 timebase ticks */
1008 4: mfspr r5, SPRN_TBRL
1015 * Fill out the rest of this cache line and the next with nops,
1016 * to ensure that nothing outside the locked area will be
1017 * fetched due to a branch.
1024 mfspr r11, SPRN_L1CSR1
1025 rlwinm r11, r11, 0, ~L1CSR1_ICUL
1028 mtspr SPRN_L1CSR1, r11
1037 create_init_ram_area:
1038 lis r6,FSL_BOOKE_MAS0(1, 15, 0)@h
1039 ori r6,r6,FSL_BOOKE_MAS0(1, 15, 0)@l
1042 /* create a temp mapping in AS=1 to the 4M boot window */
1043 create_tlb1_entry 15, \
1044 1, BOOKE_PAGESZ_4M, \
1045 CONFIG_SYS_MONITOR_BASE & 0xffc00000, MAS2_I|MAS2_G, \
1046 0xffc00000, MAS3_SX|MAS3_SW|MAS3_SR, \
1049 #elif !defined(CONFIG_SYS_RAMBOOT) && defined(CONFIG_SECURE_BOOT)
1050 /* create a temp mapping in AS = 1 for Flash mapping
1051 * created by PBL for ISBC code
1053 create_tlb1_entry 15, \
1054 1, BOOKE_PAGESZ_1M, \
1055 CONFIG_SYS_MONITOR_BASE & 0xfff00000, MAS2_I|MAS2_G, \
1056 CONFIG_SYS_PBI_FLASH_WINDOW & 0xfff00000, MAS3_SX|MAS3_SW|MAS3_SR, \
1060 * create a temp mapping in AS=1 to the 1M CONFIG_SYS_MONITOR_BASE space, the main
1061 * image has been relocated to CONFIG_SYS_MONITOR_BASE on the second stage.
1063 create_tlb1_entry 15, \
1064 1, BOOKE_PAGESZ_1M, \
1065 CONFIG_SYS_MONITOR_BASE & 0xfff00000, MAS2_I|MAS2_G, \
1066 CONFIG_SYS_MONITOR_BASE & 0xfff00000, MAS3_SX|MAS3_SW|MAS3_SR, \
1070 /* create a temp mapping in AS=1 to the stack */
1071 #if defined(CONFIG_SYS_INIT_RAM_ADDR_PHYS_LOW) && \
1072 defined(CONFIG_SYS_INIT_RAM_ADDR_PHYS_HIGH)
1073 create_tlb1_entry 14, \
1074 1, BOOKE_PAGESZ_16K, \
1075 CONFIG_SYS_INIT_RAM_ADDR, 0, \
1076 CONFIG_SYS_INIT_RAM_ADDR_PHYS_LOW, MAS3_SX|MAS3_SW|MAS3_SR, \
1077 CONFIG_SYS_INIT_RAM_ADDR_PHYS_HIGH, r6
1080 create_tlb1_entry 14, \
1081 1, BOOKE_PAGESZ_16K, \
1082 CONFIG_SYS_INIT_RAM_ADDR, 0, \
1083 CONFIG_SYS_INIT_RAM_ADDR, MAS3_SX|MAS3_SW|MAS3_SR, \
1087 lis r6,MSR_IS|MSR_DS|MSR_DE@h
1088 ori r6,r6,MSR_IS|MSR_DS|MSR_DE@l
1090 ori r7,r7,switch_as@l
1097 /* L1 DCache is used for initial RAM */
1099 /* Allocate Initial RAM in data cache.
1101 lis r3,CONFIG_SYS_INIT_RAM_ADDR@h
1102 ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l
1105 /* cache size * 1024 / (2 * L1 line size) */
1106 slwi r2, r2, (10 - 1 - L1_CACHE_SHIFT)
1112 addi r3,r3,CONFIG_SYS_CACHELINE_SIZE
1115 /* Jump out the last 4K page and continue to 'normal' start */
1116 #if defined(CONFIG_SYS_RAMBOOT) || defined(CONFIG_SPL)
1117 /* We assume that we're already running at the address we're linked at */
1120 /* Calculate absolute address in FLASH and jump there */
1121 /*--------------------------------------------------------------*/
1122 lis r3,CONFIG_SYS_MONITOR_BASE@h
1123 ori r3,r3,CONFIG_SYS_MONITOR_BASE@l
1124 addi r3,r3,_start_cont - _start + _START_OFFSET
1132 .long 0x27051956 /* U-BOOT Magic Number */
1133 .globl version_string
1135 .ascii U_BOOT_VERSION_STRING, "\0"
1140 /* Setup the stack in initial RAM,could be L2-as-SRAM or L1 dcache*/
1141 lis r3,(CONFIG_SYS_INIT_RAM_ADDR)@h
1142 ori r3,r3,((CONFIG_SYS_INIT_SP_OFFSET-16)&~0xf)@l /* Align to 16 */
1144 stw r0,0(r3) /* Terminate Back Chain */
1145 stw r0,+4(r3) /* NULL return address. */
1146 mr r1,r3 /* Transfer to SP(r1) */
1150 /* Pass our potential ePAPR device tree pointer to cpu_init_early_f */
1155 /* switch back to AS = 0 */
1156 lis r3,(MSR_CE|MSR_ME|MSR_DE)@h
1157 ori r3,r3,(MSR_CE|MSR_ME|MSR_DE)@l
1161 bl cpu_init_f /* return boot_flag for calling board_init_f */
1165 /* NOTREACHED - board_init_f() does not return */
1168 . = EXC_OFF_SYS_RESET
1169 .globl _start_of_vectors
1172 /* Critical input. */
1173 CRIT_EXCEPTION(0x0100, CriticalInput, CritcalInputException)
1176 MCK_EXCEPTION(0x200, MachineCheck, MachineCheckException)
1178 /* Data Storage exception. */
1179 STD_EXCEPTION(0x0300, DataStorage, UnknownException)
1181 /* Instruction Storage exception. */
1182 STD_EXCEPTION(0x0400, InstStorage, UnknownException)
1184 /* External Interrupt exception. */
1185 STD_EXCEPTION(0x0500, ExtInterrupt, ExtIntException)
1187 /* Alignment exception. */
1190 EXCEPTION_PROLOG(SRR0, SRR1)
1195 addi r3,r1,STACK_FRAME_OVERHEAD
1196 EXC_XFER_TEMPLATE(Alignment, AlignmentException, MSR_KERNEL, COPY_EE)
1198 /* Program check exception */
1201 EXCEPTION_PROLOG(SRR0, SRR1)
1202 addi r3,r1,STACK_FRAME_OVERHEAD
1203 EXC_XFER_TEMPLATE(ProgramCheck, ProgramCheckException,
1204 MSR_KERNEL, COPY_EE)
1206 /* No FPU on MPC85xx. This exception is not supposed to happen.
1208 STD_EXCEPTION(0x0800, FPUnavailable, UnknownException)
1212 * r0 - SYSCALL number
1216 addis r11,r0,0 /* get functions table addr */
1217 ori r11,r11,0 /* Note: this code is patched in trap_init */
1218 addis r12,r0,0 /* get number of functions */
1224 rlwinm r0,r0,2,0,31 /* fn_addr = fn_tbl[r0] */
1228 li r20,0xd00-4 /* Get stack pointer */
1230 subi r12,r12,12 /* Adjust stack pointer */
1231 li r0,0xc00+_end_back-SystemCall
1232 cmplw 0,r0,r12 /* Check stack overflow */
1243 li r12,0xc00+_back-SystemCall
1251 mfmsr r11 /* Disable interrupts */
1255 SYNC /* Some chip revs need this... */
1259 li r12,0xd00-4 /* restore regs */
1269 addi r12,r12,12 /* Adjust stack pointer */
1277 STD_EXCEPTION(0x0a00, Decrementer, timer_interrupt)
1278 STD_EXCEPTION(0x0b00, IntervalTimer, UnknownException)
1279 STD_EXCEPTION(0x0c00, WatchdogTimer, UnknownException)
1281 STD_EXCEPTION(0x0d00, DataTLBError, UnknownException)
1282 STD_EXCEPTION(0x0e00, InstructionTLBError, UnknownException)
1284 CRIT_EXCEPTION(0x0f00, DebugBreakpoint, DebugException )
1286 .globl _end_of_vectors
1290 . = . + (0x100 - ( . & 0xff )) /* align for debug */
1293 * This code finishes saving the registers to the exception frame
1294 * and jumps to the appropriate handler for the exception.
1295 * Register r21 is pointer into trap frame, r1 has new stack pointer.
1297 .globl transfer_to_handler
1298 transfer_to_handler:
1309 andi. r24,r23,0x3f00 /* get vector offset */
1313 mtspr SPRG2,r22 /* r1 is now kernel sp */
1315 lwz r24,0(r23) /* virtual address of handler */
1316 lwz r23,4(r23) /* where to go when done */
1321 rfi /* jump to handler, enable MMU */
1324 mfmsr r28 /* Disable interrupts */
1328 SYNC /* Some chip revs need this... */
1343 lwz r2,_NIP(r1) /* Restore environment */
1354 mfmsr r28 /* Disable interrupts */
1358 SYNC /* Some chip revs need this... */
1373 lwz r2,_NIP(r1) /* Restore environment */
1384 mfmsr r28 /* Disable interrupts */
1388 SYNC /* Some chip revs need this... */
1403 lwz r2,_NIP(r1) /* Restore environment */
1405 mtspr SPRN_MCSRR0,r2
1406 mtspr SPRN_MCSRR1,r0
1417 .globl invalidate_icache
1420 ori r0,r0,L1CSR1_ICFI
1425 blr /* entire I cache */
1427 .globl invalidate_dcache
1430 ori r0,r0,L1CSR0_DCFI
1437 .globl icache_enable
1440 bl invalidate_icache
1450 .globl icache_disable
1454 ori r3,r3,L1CSR1_ICE
1460 .globl icache_status
1463 andi. r3,r3,L1CSR1_ICE
1466 .globl dcache_enable
1469 bl invalidate_dcache
1481 .globl dcache_disable
1485 ori r4,r4,L1CSR0_DCE
1491 .globl dcache_status
1494 andi. r3,r3,L1CSR0_DCE
1517 /*------------------------------------------------------------------------------- */
1519 /* Description: Input 8 bits */
1520 /*------------------------------------------------------------------------------- */
1526 /*------------------------------------------------------------------------------- */
1527 /* Function: out8 */
1528 /* Description: Output 8 bits */
1529 /*------------------------------------------------------------------------------- */
1536 /*------------------------------------------------------------------------------- */
1537 /* Function: out16 */
1538 /* Description: Output 16 bits */
1539 /*------------------------------------------------------------------------------- */
1546 /*------------------------------------------------------------------------------- */
1547 /* Function: out16r */
1548 /* Description: Byte reverse and output 16 bits */
1549 /*------------------------------------------------------------------------------- */
1556 /*------------------------------------------------------------------------------- */
1557 /* Function: out32 */
1558 /* Description: Output 32 bits */
1559 /*------------------------------------------------------------------------------- */
1566 /*------------------------------------------------------------------------------- */
1567 /* Function: out32r */
1568 /* Description: Byte reverse and output 32 bits */
1569 /*------------------------------------------------------------------------------- */
1576 /*------------------------------------------------------------------------------- */
1577 /* Function: in16 */
1578 /* Description: Input 16 bits */
1579 /*------------------------------------------------------------------------------- */
1585 /*------------------------------------------------------------------------------- */
1586 /* Function: in16r */
1587 /* Description: Input 16 bits and byte reverse */
1588 /*------------------------------------------------------------------------------- */
1594 /*------------------------------------------------------------------------------- */
1595 /* Function: in32 */
1596 /* Description: Input 32 bits */
1597 /*------------------------------------------------------------------------------- */
1603 /*------------------------------------------------------------------------------- */
1604 /* Function: in32r */
1605 /* Description: Input 32 bits and byte reverse */
1606 /*------------------------------------------------------------------------------- */
1611 #endif /* !MINIMAL_SPL */
1613 /*------------------------------------------------------------------------------*/
1616 * void write_tlb(mas0, mas1, mas2, mas3, mas7)
1624 #ifdef CONFIG_ENABLE_36BIT_PHYS
1628 #ifdef CONFIG_SYS_BOOK3E_HV
1638 * void relocate_code (addr_sp, gd, addr_moni)
1640 * This "function" does not return, instead it continues in RAM
1641 * after relocating the monitor code.
1645 * r5 = length in bytes
1646 * r6 = cachelinesize
1648 .globl relocate_code
1650 mr r1,r3 /* Set new stack pointer */
1651 mr r9,r4 /* Save copy of Init Data pointer */
1652 mr r10,r5 /* Save copy of Destination Address */
1655 #ifndef CONFIG_SPL_SKIP_RELOCATE
1656 mr r3,r5 /* Destination Address */
1657 lis r4,CONFIG_SYS_MONITOR_BASE@h /* Source Address */
1658 ori r4,r4,CONFIG_SYS_MONITOR_BASE@l
1659 lwz r5,GOT(__init_end)
1661 li r6,CONFIG_SYS_CACHELINE_SIZE /* Cache Line Size */
1666 * New GOT-PTR = (old GOT-PTR - CONFIG_SYS_MONITOR_BASE) + Destination Address
1672 /* First our own GOT */
1674 /* the the one used by the C code */
1684 beq cr1,4f /* In place copy is not necessary */
1685 beq 7f /* Protect against 0 count */
1704 * Now flush the cache: note that we must start from a cache aligned
1705 * address. Otherwise we might miss one cache line.
1709 beq 7f /* Always flush prefetch queue in any case */
1717 sync /* Wait for all dcbst to complete on bus */
1723 7: sync /* Wait for all icbi to complete on bus */
1727 * We are done. Do not return, instead branch to second part of board
1728 * initialization, now running from RAM.
1731 addi r0,r10,in_ram - _start + _START_OFFSET
1734 * As IVPR is going to point RAM address,
1735 * Make sure IVOR15 has valid opcode to support debugger
1740 * Re-point the IVPR at RAM
1745 blr /* NEVER RETURNS! */
1751 * Relocation Function, r12 point to got2+0x8000
1753 * Adjust got2 pointers, no need to check for 0, this code
1754 * already puts a few entries in the table.
1756 li r0,__got2_entries@sectoff@l
1757 la r3,GOT(_GOT2_TABLE_)
1758 lwz r11,GOT(_GOT2_TABLE_)
1770 * Now adjust the fixups and the pointers to the fixups
1771 * in case we need to move ourselves again.
1773 li r0,__fixup_entries@sectoff@l
1774 lwz r3,GOT(_FIXUP_TABLE_)
1790 * Now clear BSS segment
1792 lwz r3,GOT(__bss_start)
1793 lwz r4,GOT(__bss_end)
1806 mr r3,r9 /* Init Data pointer */
1807 mr r4,r10 /* Destination Address */
1812 * Copy exception vector code to low memory
1815 * r7: source address, r8: end address, r9: target address
1819 mflr r4 /* save link register */
1821 lwz r7,GOT(_start_of_vectors)
1822 lwz r8,GOT(_end_of_vectors)
1824 li r9,0x100 /* reset vector always at 0x100 */
1827 bgelr /* return if r7>=r8 - just in case */
1837 * relocate `hdlr' and `int_return' entries
1839 li r7,.L_CriticalInput - _start + _START_OFFSET
1841 li r7,.L_MachineCheck - _start + _START_OFFSET
1843 li r7,.L_DataStorage - _start + _START_OFFSET
1845 li r7,.L_InstStorage - _start + _START_OFFSET
1847 li r7,.L_ExtInterrupt - _start + _START_OFFSET
1849 li r7,.L_Alignment - _start + _START_OFFSET
1851 li r7,.L_ProgramCheck - _start + _START_OFFSET
1853 li r7,.L_FPUnavailable - _start + _START_OFFSET
1855 li r7,.L_Decrementer - _start + _START_OFFSET
1857 li r7,.L_IntervalTimer - _start + _START_OFFSET
1858 li r8,_end_of_vectors - _start + _START_OFFSET
1861 addi r7,r7,0x100 /* next exception vector */
1865 /* Update IVORs as per relocated vector table address */
1867 mtspr IVOR0,r7 /* 0: Critical input */
1869 mtspr IVOR1,r7 /* 1: Machine check */
1871 mtspr IVOR2,r7 /* 2: Data storage */
1873 mtspr IVOR3,r7 /* 3: Instruction storage */
1875 mtspr IVOR4,r7 /* 4: External interrupt */
1877 mtspr IVOR5,r7 /* 5: Alignment */
1879 mtspr IVOR6,r7 /* 6: Program check */
1881 mtspr IVOR7,r7 /* 7: floating point unavailable */
1883 mtspr IVOR8,r7 /* 8: System call */
1884 /* 9: Auxiliary processor unavailable(unsupported) */
1886 mtspr IVOR10,r7 /* 10: Decrementer */
1888 mtspr IVOR11,r7 /* 11: Interval timer */
1890 mtspr IVOR12,r7 /* 12: Watchdog timer */
1892 mtspr IVOR13,r7 /* 13: Data TLB error */
1894 mtspr IVOR14,r7 /* 14: Instruction TLB error */
1896 mtspr IVOR15,r7 /* 15: Debug */
1901 mtlr r4 /* restore link register */
1904 .globl unlock_ram_in_cache
1905 unlock_ram_in_cache:
1906 /* invalidate the INIT_RAM section */
1907 lis r3,(CONFIG_SYS_INIT_RAM_ADDR & ~(CONFIG_SYS_CACHELINE_SIZE-1))@h
1908 ori r3,r3,(CONFIG_SYS_INIT_RAM_ADDR & ~(CONFIG_SYS_CACHELINE_SIZE-1))@l
1911 slwi r4,r4,(10 - 1 - L1_CACHE_SHIFT)
1915 addi r3,r3,CONFIG_SYS_CACHELINE_SIZE
1919 /* Invalidate the TLB entries for the cache */
1920 lis r3,CONFIG_SYS_INIT_RAM_ADDR@h
1921 ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l
1934 mfspr r3,SPRN_L1CFG0
1936 rlwinm r5,r3,9,3 /* Extract cache block size */
1937 twlgti r5,1 /* Only 32 and 64 byte cache blocks
1938 * are currently defined.
1941 subfic r6,r5,2 /* r6 = log2(1KiB / cache block size) -
1942 * log2(number of ways)
1944 slw r5,r4,r5 /* r5 = cache block size */
1946 rlwinm r7,r3,0,0xff /* Extract number of KiB in the cache */
1947 mulli r7,r7,13 /* An 8-way cache will require 13
1952 /* save off HID0 and set DCFA */
1954 ori r9,r8,HID0_DCFA@l
1961 1: lwz r3,0(r4) /* Load... */
1969 1: dcbf 0,r4 /* ...and flush. */
1978 #endif /* !MINIMAL_SPL */