2 * Copyright 2004, 2007-2011 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.
86 #if defined(CONFIG_SECURE_BOOT) && defined(CONFIG_E500MC)
87 /* ISBC uses L2 as stack.
88 * Disable L2 cache here so that u-boot can enable it later
89 * as part of it's normal flow
92 /* Check if L2 is enabled */
95 ori r2, r2, L2CSR0_L2E@l
101 lis r2,(L2CSR0_L2FL)@h
102 ori r2, r2, (L2CSR0_L2FL)@l
109 mfspr r3, SPRN_L2CSR0
113 mfspr r3, SPRN_L2CSR0
115 ori r2, r2, L2CSR0_L2E@l
125 /* clear registers/arrays not reset by hardware */
129 mtspr L1CSR0,r0 /* invalidate d-cache */
130 mtspr L1CSR1,r0 /* invalidate i-cache */
133 mtspr DBSR,r1 /* Clear all valid bits */
136 * Enable L1 Caches early
140 #if defined(CONFIG_E500MC) && defined(CONFIG_SYS_CACHE_STASHING)
141 /* set stash id to (coreID) * 2 + 32 + L1 CT (0) */
146 /* Enable/invalidate the I-Cache */
147 lis r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@h
148 ori r2,r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@l
155 lis r3,(L1CSR1_CPE|L1CSR1_ICE)@h
156 ori r3,r3,(L1CSR1_CPE|L1CSR1_ICE)@l
161 andi. r1,r3,L1CSR1_ICE@l
164 /* Enable/invalidate the D-Cache */
165 lis r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@h
166 ori r2,r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@l
173 lis r3,(L1CSR0_CPE|L1CSR0_DCE)@h
174 ori r3,r3,(L1CSR0_CPE|L1CSR0_DCE)@l
179 andi. r1,r3,L1CSR0_DCE@l
182 /* Setup interrupt vectors */
183 lis r1,CONFIG_SYS_MONITOR_BASE@h
187 mtspr IVOR0,r1 /* 0: Critical input */
189 mtspr IVOR1,r1 /* 1: Machine check */
191 mtspr IVOR2,r1 /* 2: Data storage */
193 mtspr IVOR3,r1 /* 3: Instruction storage */
195 mtspr IVOR4,r1 /* 4: External interrupt */
197 mtspr IVOR5,r1 /* 5: Alignment */
199 mtspr IVOR6,r1 /* 6: Program check */
201 mtspr IVOR7,r1 /* 7: floating point unavailable */
203 mtspr IVOR8,r1 /* 8: System call */
204 /* 9: Auxiliary processor unavailable(unsupported) */
206 mtspr IVOR10,r1 /* 10: Decrementer */
208 mtspr IVOR11,r1 /* 11: Interval timer */
210 mtspr IVOR12,r1 /* 12: Watchdog timer */
212 mtspr IVOR13,r1 /* 13: Data TLB error */
214 mtspr IVOR14,r1 /* 14: Instruction TLB error */
216 mtspr IVOR15,r1 /* 15: Debug */
218 /* Clear and set up some registers. */
221 mtspr DEC,r0 /* prevent dec exceptions */
222 mttbl r0 /* prevent fit & wdt exceptions */
224 mtspr TSR,r1 /* clear all timer exception status */
225 mtspr TCR,r0 /* disable all */
226 mtspr ESR,r0 /* clear exception syndrome register */
227 mtspr MCSR,r0 /* machine check syndrome register */
228 mtxer r0 /* clear integer exception register */
230 #ifdef CONFIG_SYS_BOOK3E_HV
231 mtspr MAS8,r0 /* make sure MAS8 is clear */
234 /* Enable Time Base and Select Time Base Clock */
235 lis r0,HID0_EMCP@h /* Enable machine check */
236 #if defined(CONFIG_ENABLE_36BIT_PHYS)
237 ori r0,r0,HID0_ENMAS7@l /* Enable MAS7 */
239 #ifndef CONFIG_E500MC
240 ori r0,r0,HID0_TBEN@l /* Enable Timebase */
244 #ifndef CONFIG_E500MC
245 li r0,(HID1_ASTME|HID1_ABE)@l /* Addr streaming & broadcast */
248 cmpwi r3,0x50@l /* if we are rev 5.0 or greater set MBDD */
250 /* Set MBDD bit also */
251 ori r0, r0, HID1_MBDD@l
256 /* Enable Branch Prediction */
257 #if defined(CONFIG_BTB)
258 lis r0,BUCSR_ENABLE@h
259 ori r0,r0,BUCSR_ENABLE@l
263 #if defined(CONFIG_SYS_INIT_DBCR)
266 mtspr DBSR,r1 /* Clear all status bits */
267 lis r0,CONFIG_SYS_INIT_DBCR@h /* DBCR0[IDM] must be set */
268 ori r0,r0,CONFIG_SYS_INIT_DBCR@l
272 #ifdef CONFIG_MPC8569
273 #define CONFIG_SYS_LBC_ADDR (CONFIG_SYS_CCSRBAR_DEFAULT + 0x5000)
274 #define CONFIG_SYS_LBCR_ADDR (CONFIG_SYS_LBC_ADDR + 0xd0)
276 /* MPC8569 Rev.0 silcon needs to set bit 13 of LBCR to allow elBC to
277 * use address space which is more than 12bits, and it must be done in
278 * the 4K boot page. So we set this bit here.
281 /* create a temp mapping TLB0[0] for LBCR */
282 lis r6,FSL_BOOKE_MAS0(0, 0, 0)@h
283 ori r6,r6,FSL_BOOKE_MAS0(0, 0, 0)@l
285 lis r7,FSL_BOOKE_MAS1(1, 0, 0, 0, BOOKE_PAGESZ_4K)@h
286 ori r7,r7,FSL_BOOKE_MAS1(1, 0, 0, 0, BOOKE_PAGESZ_4K)@l
288 lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_LBC_ADDR, MAS2_I|MAS2_G)@h
289 ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_LBC_ADDR, MAS2_I|MAS2_G)@l
291 lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_LBC_ADDR, 0,
292 (MAS3_SX|MAS3_SW|MAS3_SR))@h
293 ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_LBC_ADDR, 0,
294 (MAS3_SX|MAS3_SW|MAS3_SR))@l
304 /* Set LBCR register */
305 lis r4,CONFIG_SYS_LBCR_ADDR@h
306 ori r4,r4,CONFIG_SYS_LBCR_ADDR@l
308 lis r5,CONFIG_SYS_LBC_LBCR@h
309 ori r5,r5,CONFIG_SYS_LBC_LBCR@l
313 /* invalidate this temp TLB */
314 lis r4,CONFIG_SYS_LBC_ADDR@h
315 ori r4,r4,CONFIG_SYS_LBC_ADDR@l
319 #endif /* CONFIG_MPC8569 */
322 * Relocate CCSR, if necessary. We relocate CCSR if (obviously) the default
323 * location is not where we want it. This typically happens on a 36-bit
324 * system, where we want to move CCSR to near the top of 36-bit address space.
326 * To move CCSR, we create two temporary TLBs, one for the old location, and
327 * another for the new location. On CoreNet systems, we also need to create
328 * a special, temporary LAW.
330 * As a general rule, TLB0 is used for short-term TLBs, and TLB1 is used for
331 * long-term TLBs, so we use TLB0 here.
333 #if (CONFIG_SYS_CCSRBAR_DEFAULT != CONFIG_SYS_CCSRBAR_PHYS)
335 #if !defined(CONFIG_SYS_CCSRBAR_PHYS_HIGH) || !defined(CONFIG_SYS_CCSRBAR_PHYS_LOW)
336 #error "CONFIG_SYS_CCSRBAR_PHYS_HIGH and CONFIG_SYS_CCSRBAR_PHYS_LOW) must be defined."
340 lis r8, CONFIG_SYS_CCSRBAR@h
341 ori r8, r8, CONFIG_SYS_CCSRBAR@l
342 lis r9, (CONFIG_SYS_CCSRBAR + 0x1000)@h
343 ori r9, r9, (CONFIG_SYS_CCSRBAR + 0x1000)@l
346 * In a multi-stage boot (e.g. NAND boot), a previous stage may have
347 * created a TLB for CCSR, which will interfere with our relocation
348 * code. Since we're going to create a new TLB for CCSR anyway,
349 * it should be safe to delete this old TLB here. We have to search
354 mtspr MAS6, r1 /* Search the current address space and PID */
357 andis. r2, r1, MAS1_VALID@h /* Check for the Valid bit */
358 beq 1f /* Skip if no TLB found */
360 rlwinm r1, r1, 0, 1, 31 /* Clear Valid bit */
367 * Create a TLB for the new location of CCSR. Register R8 is reserved
368 * for the virtual address of this TLB (CONFIG_SYS_CCSRBAR).
370 lis r0, FSL_BOOKE_MAS0(0, 0, 0)@h
371 ori r0, r0, FSL_BOOKE_MAS0(0, 0, 0)@l
372 lis r1, FSL_BOOKE_MAS1(1, 0, 0, 0, BOOKE_PAGESZ_4K)@h
373 ori r1, r1, FSL_BOOKE_MAS1(1, 0, 0, 0, BOOKE_PAGESZ_4K)@l
374 lis r2, FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR, (MAS2_I|MAS2_G))@h
375 ori r2, r2, FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR, (MAS2_I|MAS2_G))@l
376 lis r3, FSL_BOOKE_MAS3(CONFIG_SYS_CCSRBAR_PHYS_LOW, 0, (MAS3_SW|MAS3_SR))@h
377 ori r3, r3, FSL_BOOKE_MAS3(CONFIG_SYS_CCSRBAR_PHYS_LOW, 0, (MAS3_SW|MAS3_SR))@l
378 lis r7, CONFIG_SYS_CCSRBAR_PHYS_HIGH@h
379 ori r7, r7, CONFIG_SYS_CCSRBAR_PHYS_HIGH@l
390 * Create a TLB for the current location of CCSR. Register R9 is reserved
391 * for the virtual address of this TLB (CONFIG_SYS_CCSRBAR + 0x1000).
394 lis r0, FSL_BOOKE_MAS0(0, 1, 0)@h
395 ori r0, r0, FSL_BOOKE_MAS0(0, 1, 0)@l
396 lis r2, FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR + 0x1000, (MAS2_I|MAS2_G))@h
397 ori r2, r2, FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR + 0x1000, (MAS2_I|MAS2_G))@l
398 lis r3, FSL_BOOKE_MAS3(CONFIG_SYS_CCSRBAR_DEFAULT, 0, (MAS3_SW|MAS3_SR))@h
399 ori r3, r3, FSL_BOOKE_MAS3(CONFIG_SYS_CCSRBAR_DEFAULT, 0, (MAS3_SW|MAS3_SR))@l
400 li r7, 0 /* The default CCSR address is always a 32-bit number */
402 /* MAS1 is the same as above */
410 #ifdef CONFIG_FSL_CORENET
412 #define CCSR_LAWBARH0 (CONFIG_SYS_CCSRBAR + 0x1000)
413 #define LAW_EN 0x80000000
414 #define LAW_SIZE_4K 0xb
415 #define CCSRBAR_LAWAR (LAW_EN | (0x1e << 20) | LAW_SIZE_4K)
416 #define CCSRAR_C 0x80000000 /* Commit */
420 * On CoreNet systems, we create the temporary LAW using a special LAW
421 * target ID of 0x1e. LAWBARH is at offset 0xc00 in CCSR.
423 lis r0, CONFIG_SYS_CCSRBAR_PHYS_HIGH@h
424 ori r0, r0, CONFIG_SYS_CCSRBAR_PHYS_HIGH@l
425 lis r1, CONFIG_SYS_CCSRBAR_PHYS_LOW@h
426 ori r1, r1, CONFIG_SYS_CCSRBAR_PHYS_LOW@l
427 lis r2, CCSRBAR_LAWAR@h
428 ori r2, r2, CCSRBAR_LAWAR@l
430 stw r0, 0xc00(r9) /* LAWBARH0 */
431 stw r1, 0xc04(r9) /* LAWBARL0 */
433 stw r2, 0xc08(r9) /* LAWAR0 */
436 * Read back from LAWAR to ensure the update is complete. e500mc
437 * cores also require an isync.
439 lwz r0, 0xc08(r9) /* LAWAR0 */
443 * Read the current CCSRBARH and CCSRBARL using load word instructions.
444 * Follow this with an isync instruction. This forces any outstanding
445 * accesses to configuration space to completion.
448 lwz r0, 0(r9) /* CCSRBARH */
449 lwz r0, 4(r9) /* CCSRBARL */
453 * Write the new values for CCSRBARH and CCSRBARL to their old
454 * locations. The CCSRBARH has a shadow register. When the CCSRBARH
455 * has a new value written it loads a CCSRBARH shadow register. When
456 * the CCSRBARL is written, the CCSRBARH shadow register contents
457 * along with the CCSRBARL value are loaded into the CCSRBARH and
458 * CCSRBARL registers, respectively. Follow this with a sync
462 lis r0, CONFIG_SYS_CCSRBAR_PHYS_HIGH@h
463 ori r0, r0, CONFIG_SYS_CCSRBAR_PHYS_HIGH@l
464 lis r1, CONFIG_SYS_CCSRBAR_PHYS_LOW@h
465 ori r1, r1, CONFIG_SYS_CCSRBAR_PHYS_LOW@l
467 ori r2, r2, CCSRAR_C@l
469 stw r0, 0(r9) /* Write to CCSRBARH */
470 sync /* Make sure we write to CCSRBARH first */
471 stw r1, 4(r9) /* Write to CCSRBARL */
475 * Write a 1 to the commit bit (C) of CCSRAR at the old location.
476 * Follow this with a sync instruction.
481 /* Delete the temporary LAW */
490 #else /* #ifdef CONFIG_FSL_CORENET */
494 * Read the current value of CCSRBAR using a load word instruction
495 * followed by an isync. This forces all accesses to configuration
502 /* CONFIG_SYS_CCSRBAR_PHYS right shifted by 12 */
503 #define CCSRBAR_PHYS_RS12 ((CONFIG_SYS_CCSRBAR_PHYS_HIGH << 20) | \
504 (CONFIG_SYS_CCSRBAR_PHYS_LOW >> 12))
506 /* Write the new value to CCSRBAR. */
507 lis r0, CCSRBAR_PHYS_RS12@h
508 ori r0, r0, CCSRBAR_PHYS_RS12@l
513 * The manual says to perform a load of an address that does not
514 * access configuration space or the on-chip SRAM using an existing TLB,
515 * but that doesn't appear to be necessary. We will do the isync,
521 * Read the contents of CCSRBAR from its new location, followed by
527 #endif /* #ifdef CONFIG_FSL_CORENET */
529 /* Delete the temporary TLBs */
531 lis r0, FSL_BOOKE_MAS0(0, 0, 0)@h
532 ori r0, r0, FSL_BOOKE_MAS0(0, 0, 0)@l
534 lis r2, FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR, (MAS2_I|MAS2_G))@h
535 ori r2, r2, FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR, (MAS2_I|MAS2_G))@l
543 lis r0, FSL_BOOKE_MAS0(0, 1, 0)@h
544 ori r0, r0, FSL_BOOKE_MAS0(0, 1, 0)@l
545 lis r2, FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR + 0x1000, (MAS2_I|MAS2_G))@h
546 ori r2, r2, FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR + 0x1000, (MAS2_I|MAS2_G))@l
552 #endif /* #if (CONFIG_SYS_CCSRBAR_DEFAULT != CONFIG_SYS_CCSRBAR_PHYS) */
554 create_init_ram_area:
555 lis r6,FSL_BOOKE_MAS0(1, 15, 0)@h
556 ori r6,r6,FSL_BOOKE_MAS0(1, 15, 0)@l
558 #if !defined(CONFIG_SYS_RAMBOOT) && !defined(CONFIG_SECURE_BOOT)
559 /* create a temp mapping in AS=1 to the 4M boot window */
560 lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_4M)@h
561 ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_4M)@l
563 lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_MONITOR_BASE & 0xffc00000, (MAS2_I|MAS2_G))@h
564 ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_MONITOR_BASE & 0xffc00000, (MAS2_I|MAS2_G))@l
566 /* The 85xx has the default boot window 0xff800000 - 0xffffffff */
567 lis r9,FSL_BOOKE_MAS3(0xffc00000, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h
568 ori r9,r9,FSL_BOOKE_MAS3(0xffc00000, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l
569 #elif !defined(CONFIG_SYS_RAMBOOT) && defined(CONFIG_SECURE_BOOT)
570 /* create a temp mapping in AS = 1 for Flash mapping
571 * created by PBL for ISBC code
573 lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_1M)@h
574 ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_1M)@l
576 lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_MONITOR_BASE, (MAS2_I|MAS2_G))@h
577 ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_MONITOR_BASE, (MAS2_I|MAS2_G))@l
579 lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_PBI_FLASH_WINDOW, 0,
580 (MAS3_SX|MAS3_SW|MAS3_SR))@h
581 ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_PBI_FLASH_WINDOW, 0,
582 (MAS3_SX|MAS3_SW|MAS3_SR))@l
585 * create a temp mapping in AS=1 to the 1M CONFIG_SYS_MONITOR_BASE space, the main
586 * image has been relocated to CONFIG_SYS_MONITOR_BASE on the second stage.
588 lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_1M)@h
589 ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_1M)@l
591 lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_MONITOR_BASE, (MAS2_I|MAS2_G))@h
592 ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_MONITOR_BASE, (MAS2_I|MAS2_G))@l
594 lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_MONITOR_BASE, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h
595 ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_MONITOR_BASE, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l
606 /* create a temp mapping in AS=1 to the stack */
607 lis r6,FSL_BOOKE_MAS0(1, 14, 0)@h
608 ori r6,r6,FSL_BOOKE_MAS0(1, 14, 0)@l
610 lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_16K)@h
611 ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_16K)@l
613 lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_INIT_RAM_ADDR, 0)@h
614 ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_INIT_RAM_ADDR, 0)@l
616 #if defined(CONFIG_SYS_INIT_RAM_ADDR_PHYS_LOW) && \
617 defined(CONFIG_SYS_INIT_RAM_ADDR_PHYS_HIGH)
618 lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR_PHYS_LOW, 0,
619 (MAS3_SX|MAS3_SW|MAS3_SR))@h
620 ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR_PHYS_LOW, 0,
621 (MAS3_SX|MAS3_SW|MAS3_SR))@l
622 li r10,CONFIG_SYS_INIT_RAM_ADDR_PHYS_HIGH
625 lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h
626 ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l
637 lis r6,MSR_IS|MSR_DS@h
638 ori r6,r6,MSR_IS|MSR_DS@l
640 ori r7,r7,switch_as@l
647 /* L1 DCache is used for initial RAM */
649 /* Allocate Initial RAM in data cache.
651 lis r3,CONFIG_SYS_INIT_RAM_ADDR@h
652 ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l
655 /* cache size * 1024 / (2 * L1 line size) */
656 slwi r2, r2, (10 - 1 - L1_CACHE_SHIFT)
662 addi r3,r3,CONFIG_SYS_CACHELINE_SIZE
665 /* Jump out the last 4K page and continue to 'normal' start */
666 #ifdef CONFIG_SYS_RAMBOOT
669 /* Calculate absolute address in FLASH and jump there */
670 /*--------------------------------------------------------------*/
671 lis r3,CONFIG_SYS_MONITOR_BASE@h
672 ori r3,r3,CONFIG_SYS_MONITOR_BASE@l
673 addi r3,r3,_start_cont - _start + _START_OFFSET
681 .long 0x27051956 /* U-BOOT Magic Number */
682 .globl version_string
684 .ascii U_BOOT_VERSION_STRING, "\0"
689 /* Setup the stack in initial RAM,could be L2-as-SRAM or L1 dcache*/
690 lis r1,CONFIG_SYS_INIT_RAM_ADDR@h
691 ori r1,r1,CONFIG_SYS_INIT_SP_OFFSET@l
695 stwu r0,-4(r1) /* Terminate call chain */
697 stwu r1,-8(r1) /* Save back chain and move SP */
698 lis r0,RESET_VECTOR@h /* Address of reset vector */
699 ori r0,r0,RESET_VECTOR@l
700 stwu r1,-8(r1) /* Save back chain and move SP */
701 stw r0,+12(r1) /* Save return addr (underflow vect) */
706 /* switch back to AS = 0 */
707 lis r3,(MSR_CE|MSR_ME|MSR_DE)@h
708 ori r3,r3,(MSR_CE|MSR_ME|MSR_DE)@l
716 /* NOTREACHED - board_init_f() does not return */
718 #ifndef CONFIG_NAND_SPL
719 . = EXC_OFF_SYS_RESET
720 .globl _start_of_vectors
723 /* Critical input. */
724 CRIT_EXCEPTION(0x0100, CriticalInput, CritcalInputException)
727 MCK_EXCEPTION(0x200, MachineCheck, MachineCheckException)
729 /* Data Storage exception. */
730 STD_EXCEPTION(0x0300, DataStorage, UnknownException)
732 /* Instruction Storage exception. */
733 STD_EXCEPTION(0x0400, InstStorage, UnknownException)
735 /* External Interrupt exception. */
736 STD_EXCEPTION(0x0500, ExtInterrupt, ExtIntException)
738 /* Alignment exception. */
741 EXCEPTION_PROLOG(SRR0, SRR1)
746 addi r3,r1,STACK_FRAME_OVERHEAD
747 EXC_XFER_TEMPLATE(Alignment, AlignmentException, MSR_KERNEL, COPY_EE)
749 /* Program check exception */
752 EXCEPTION_PROLOG(SRR0, SRR1)
753 addi r3,r1,STACK_FRAME_OVERHEAD
754 EXC_XFER_TEMPLATE(ProgramCheck, ProgramCheckException,
757 /* No FPU on MPC85xx. This exception is not supposed to happen.
759 STD_EXCEPTION(0x0800, FPUnavailable, UnknownException)
763 * r0 - SYSCALL number
767 addis r11,r0,0 /* get functions table addr */
768 ori r11,r11,0 /* Note: this code is patched in trap_init */
769 addis r12,r0,0 /* get number of functions */
775 rlwinm r0,r0,2,0,31 /* fn_addr = fn_tbl[r0] */
779 li r20,0xd00-4 /* Get stack pointer */
781 subi r12,r12,12 /* Adjust stack pointer */
782 li r0,0xc00+_end_back-SystemCall
783 cmplw 0,r0,r12 /* Check stack overflow */
794 li r12,0xc00+_back-SystemCall
802 mfmsr r11 /* Disable interrupts */
806 SYNC /* Some chip revs need this... */
810 li r12,0xd00-4 /* restore regs */
820 addi r12,r12,12 /* Adjust stack pointer */
828 STD_EXCEPTION(0x0a00, Decrementer, timer_interrupt)
829 STD_EXCEPTION(0x0b00, IntervalTimer, UnknownException)
830 STD_EXCEPTION(0x0c00, WatchdogTimer, UnknownException)
832 STD_EXCEPTION(0x0d00, DataTLBError, UnknownException)
833 STD_EXCEPTION(0x0e00, InstructionTLBError, UnknownException)
835 CRIT_EXCEPTION(0x0f00, DebugBreakpoint, DebugException )
837 .globl _end_of_vectors
841 . = . + (0x100 - ( . & 0xff )) /* align for debug */
844 * This code finishes saving the registers to the exception frame
845 * and jumps to the appropriate handler for the exception.
846 * Register r21 is pointer into trap frame, r1 has new stack pointer.
848 .globl transfer_to_handler
860 andi. r24,r23,0x3f00 /* get vector offset */
864 mtspr SPRG2,r22 /* r1 is now kernel sp */
866 lwz r24,0(r23) /* virtual address of handler */
867 lwz r23,4(r23) /* where to go when done */
872 rfi /* jump to handler, enable MMU */
875 mfmsr r28 /* Disable interrupts */
879 SYNC /* Some chip revs need this... */
894 lwz r2,_NIP(r1) /* Restore environment */
905 mfmsr r28 /* Disable interrupts */
909 SYNC /* Some chip revs need this... */
924 lwz r2,_NIP(r1) /* Restore environment */
935 mfmsr r28 /* Disable interrupts */
939 SYNC /* Some chip revs need this... */
954 lwz r2,_NIP(r1) /* Restore environment */
968 .globl invalidate_icache
971 ori r0,r0,L1CSR1_ICFI
976 blr /* entire I cache */
978 .globl invalidate_dcache
981 ori r0,r0,L1CSR0_DCFI
1001 .globl icache_disable
1005 ori r3,r3,L1CSR1_ICE
1011 .globl icache_status
1014 andi. r3,r3,L1CSR1_ICE
1017 .globl dcache_enable
1020 bl invalidate_dcache
1032 .globl dcache_disable
1036 ori r4,r4,L1CSR0_DCE
1042 .globl dcache_status
1045 andi. r3,r3,L1CSR0_DCE
1068 /*------------------------------------------------------------------------------- */
1070 /* Description: Input 8 bits */
1071 /*------------------------------------------------------------------------------- */
1077 /*------------------------------------------------------------------------------- */
1078 /* Function: out8 */
1079 /* Description: Output 8 bits */
1080 /*------------------------------------------------------------------------------- */
1087 /*------------------------------------------------------------------------------- */
1088 /* Function: out16 */
1089 /* Description: Output 16 bits */
1090 /*------------------------------------------------------------------------------- */
1097 /*------------------------------------------------------------------------------- */
1098 /* Function: out16r */
1099 /* Description: Byte reverse and output 16 bits */
1100 /*------------------------------------------------------------------------------- */
1107 /*------------------------------------------------------------------------------- */
1108 /* Function: out32 */
1109 /* Description: Output 32 bits */
1110 /*------------------------------------------------------------------------------- */
1117 /*------------------------------------------------------------------------------- */
1118 /* Function: out32r */
1119 /* Description: Byte reverse and output 32 bits */
1120 /*------------------------------------------------------------------------------- */
1127 /*------------------------------------------------------------------------------- */
1128 /* Function: in16 */
1129 /* Description: Input 16 bits */
1130 /*------------------------------------------------------------------------------- */
1136 /*------------------------------------------------------------------------------- */
1137 /* Function: in16r */
1138 /* Description: Input 16 bits and byte reverse */
1139 /*------------------------------------------------------------------------------- */
1145 /*------------------------------------------------------------------------------- */
1146 /* Function: in32 */
1147 /* Description: Input 32 bits */
1148 /*------------------------------------------------------------------------------- */
1154 /*------------------------------------------------------------------------------- */
1155 /* Function: in32r */
1156 /* Description: Input 32 bits and byte reverse */
1157 /*------------------------------------------------------------------------------- */
1162 #endif /* !CONFIG_NAND_SPL */
1164 /*------------------------------------------------------------------------------*/
1167 * void write_tlb(mas0, mas1, mas2, mas3, mas7)
1175 #ifdef CONFIG_ENABLE_36BIT_PHYS
1179 #ifdef CONFIG_SYS_BOOK3E_HV
1189 * void relocate_code (addr_sp, gd, addr_moni)
1191 * This "function" does not return, instead it continues in RAM
1192 * after relocating the monitor code.
1196 * r5 = length in bytes
1197 * r6 = cachelinesize
1199 .globl relocate_code
1201 mr r1,r3 /* Set new stack pointer */
1202 mr r9,r4 /* Save copy of Init Data pointer */
1203 mr r10,r5 /* Save copy of Destination Address */
1206 mr r3,r5 /* Destination Address */
1207 lis r4,CONFIG_SYS_MONITOR_BASE@h /* Source Address */
1208 ori r4,r4,CONFIG_SYS_MONITOR_BASE@l
1209 lwz r5,GOT(__init_end)
1211 li r6,CONFIG_SYS_CACHELINE_SIZE /* Cache Line Size */
1216 * New GOT-PTR = (old GOT-PTR - CONFIG_SYS_MONITOR_BASE) + Destination Address
1222 /* First our own GOT */
1224 /* the the one used by the C code */
1234 beq cr1,4f /* In place copy is not necessary */
1235 beq 7f /* Protect against 0 count */
1254 * Now flush the cache: note that we must start from a cache aligned
1255 * address. Otherwise we might miss one cache line.
1259 beq 7f /* Always flush prefetch queue in any case */
1267 sync /* Wait for all dcbst to complete on bus */
1273 7: sync /* Wait for all icbi to complete on bus */
1277 * Re-point the IVPR at RAM
1282 * We are done. Do not return, instead branch to second part of board
1283 * initialization, now running from RAM.
1286 addi r0,r10,in_ram - _start + _START_OFFSET
1288 blr /* NEVER RETURNS! */
1293 * Relocation Function, r12 point to got2+0x8000
1295 * Adjust got2 pointers, no need to check for 0, this code
1296 * already puts a few entries in the table.
1298 li r0,__got2_entries@sectoff@l
1299 la r3,GOT(_GOT2_TABLE_)
1300 lwz r11,GOT(_GOT2_TABLE_)
1312 * Now adjust the fixups and the pointers to the fixups
1313 * in case we need to move ourselves again.
1315 li r0,__fixup_entries@sectoff@l
1316 lwz r3,GOT(_FIXUP_TABLE_)
1332 * Now clear BSS segment
1334 lwz r3,GOT(__bss_start)
1335 lwz r4,GOT(__bss_end__)
1348 mr r3,r9 /* Init Data pointer */
1349 mr r4,r10 /* Destination Address */
1352 #ifndef CONFIG_NAND_SPL
1354 * Copy exception vector code to low memory
1357 * r7: source address, r8: end address, r9: target address
1361 mflr r4 /* save link register */
1363 lwz r7,GOT(_start_of_vectors)
1364 lwz r8,GOT(_end_of_vectors)
1366 li r9,0x100 /* reset vector always at 0x100 */
1369 bgelr /* return if r7>=r8 - just in case */
1379 * relocate `hdlr' and `int_return' entries
1381 li r7,.L_CriticalInput - _start + _START_OFFSET
1383 li r7,.L_MachineCheck - _start + _START_OFFSET
1385 li r7,.L_DataStorage - _start + _START_OFFSET
1387 li r7,.L_InstStorage - _start + _START_OFFSET
1389 li r7,.L_ExtInterrupt - _start + _START_OFFSET
1391 li r7,.L_Alignment - _start + _START_OFFSET
1393 li r7,.L_ProgramCheck - _start + _START_OFFSET
1395 li r7,.L_FPUnavailable - _start + _START_OFFSET
1397 li r7,.L_Decrementer - _start + _START_OFFSET
1399 li r7,.L_IntervalTimer - _start + _START_OFFSET
1400 li r8,_end_of_vectors - _start + _START_OFFSET
1403 addi r7,r7,0x100 /* next exception vector */
1410 mtlr r4 /* restore link register */
1413 .globl unlock_ram_in_cache
1414 unlock_ram_in_cache:
1415 /* invalidate the INIT_RAM section */
1416 lis r3,(CONFIG_SYS_INIT_RAM_ADDR & ~(CONFIG_SYS_CACHELINE_SIZE-1))@h
1417 ori r3,r3,(CONFIG_SYS_INIT_RAM_ADDR & ~(CONFIG_SYS_CACHELINE_SIZE-1))@l
1420 slwi r4,r4,(10 - 1 - L1_CACHE_SHIFT)
1423 addi r3,r3,CONFIG_SYS_CACHELINE_SIZE
1427 /* Invalidate the TLB entries for the cache */
1428 lis r3,CONFIG_SYS_INIT_RAM_ADDR@h
1429 ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l
1442 mfspr r3,SPRN_L1CFG0
1444 rlwinm r5,r3,9,3 /* Extract cache block size */
1445 twlgti r5,1 /* Only 32 and 64 byte cache blocks
1446 * are currently defined.
1449 subfic r6,r5,2 /* r6 = log2(1KiB / cache block size) -
1450 * log2(number of ways)
1452 slw r5,r4,r5 /* r5 = cache block size */
1454 rlwinm r7,r3,0,0xff /* Extract number of KiB in the cache */
1455 mulli r7,r7,13 /* An 8-way cache will require 13
1460 /* save off HID0 and set DCFA */
1462 ori r9,r8,HID0_DCFA@l
1469 1: lwz r3,0(r4) /* Load... */
1477 1: dcbf 0,r4 /* ...and flush. */
1490 #include "fixed_ivor.S"
1492 #endif /* !CONFIG_NAND_SPL */