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 */
359 andis. r2, r1, MAS1_VALID@h /* Check for the Valid bit */
360 beq 1f /* Skip if no TLB found */
362 rlwinm r1, r1, 0, 1, 31 /* Clear Valid bit */
371 * Create a TLB for the new location of CCSR. Register R8 is reserved
372 * for the virtual address of this TLB (CONFIG_SYS_CCSRBAR).
374 lis r0, FSL_BOOKE_MAS0(0, 0, 0)@h
375 ori r0, r0, FSL_BOOKE_MAS0(0, 0, 0)@l
376 lis r1, FSL_BOOKE_MAS1(1, 0, 0, 0, BOOKE_PAGESZ_4K)@h
377 ori r1, r1, FSL_BOOKE_MAS1(1, 0, 0, 0, BOOKE_PAGESZ_4K)@l
378 lis r2, FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR, (MAS2_I|MAS2_G))@h
379 ori r2, r2, FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR, (MAS2_I|MAS2_G))@l
380 lis r3, FSL_BOOKE_MAS3(CONFIG_SYS_CCSRBAR_PHYS_LOW, 0, (MAS3_SW|MAS3_SR))@h
381 ori r3, r3, FSL_BOOKE_MAS3(CONFIG_SYS_CCSRBAR_PHYS_LOW, 0, (MAS3_SW|MAS3_SR))@l
382 lis r7, CONFIG_SYS_CCSRBAR_PHYS_HIGH@h
383 ori r7, r7, CONFIG_SYS_CCSRBAR_PHYS_HIGH@l
394 * Create a TLB for the current location of CCSR. Register R9 is reserved
395 * for the virtual address of this TLB (CONFIG_SYS_CCSRBAR + 0x1000).
398 lis r0, FSL_BOOKE_MAS0(0, 1, 0)@h
399 ori r0, r0, FSL_BOOKE_MAS0(0, 1, 0)@l
400 lis r2, FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR + 0x1000, (MAS2_I|MAS2_G))@h
401 ori r2, r2, FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR + 0x1000, (MAS2_I|MAS2_G))@l
402 lis r3, FSL_BOOKE_MAS3(CONFIG_SYS_CCSRBAR_DEFAULT, 0, (MAS3_SW|MAS3_SR))@h
403 ori r3, r3, FSL_BOOKE_MAS3(CONFIG_SYS_CCSRBAR_DEFAULT, 0, (MAS3_SW|MAS3_SR))@l
404 li r7, 0 /* The default CCSR address is always a 32-bit number */
406 /* MAS1 is the same as above */
414 #ifdef CONFIG_FSL_CORENET
416 #define CCSR_LAWBARH0 (CONFIG_SYS_CCSRBAR + 0x1000)
417 #define LAW_EN 0x80000000
418 #define LAW_SIZE_4K 0xb
419 #define CCSRBAR_LAWAR (LAW_EN | (0x1e << 20) | LAW_SIZE_4K)
420 #define CCSRAR_C 0x80000000 /* Commit */
424 * On CoreNet systems, we create the temporary LAW using a special LAW
425 * target ID of 0x1e. LAWBARH is at offset 0xc00 in CCSR.
427 lis r0, CONFIG_SYS_CCSRBAR_PHYS_HIGH@h
428 ori r0, r0, CONFIG_SYS_CCSRBAR_PHYS_HIGH@l
429 lis r1, CONFIG_SYS_CCSRBAR_PHYS_LOW@h
430 ori r1, r1, CONFIG_SYS_CCSRBAR_PHYS_LOW@l
431 lis r2, CCSRBAR_LAWAR@h
432 ori r2, r2, CCSRBAR_LAWAR@l
434 stw r0, 0xc00(r9) /* LAWBARH0 */
435 stw r1, 0xc04(r9) /* LAWBARL0 */
437 stw r2, 0xc08(r9) /* LAWAR0 */
440 * Read back from LAWAR to ensure the update is complete. e500mc
441 * cores also require an isync.
443 lwz r0, 0xc08(r9) /* LAWAR0 */
447 * Read the current CCSRBARH and CCSRBARL using load word instructions.
448 * Follow this with an isync instruction. This forces any outstanding
449 * accesses to configuration space to completion.
452 lwz r0, 0(r9) /* CCSRBARH */
453 lwz r0, 4(r9) /* CCSRBARL */
457 * Write the new values for CCSRBARH and CCSRBARL to their old
458 * locations. The CCSRBARH has a shadow register. When the CCSRBARH
459 * has a new value written it loads a CCSRBARH shadow register. When
460 * the CCSRBARL is written, the CCSRBARH shadow register contents
461 * along with the CCSRBARL value are loaded into the CCSRBARH and
462 * CCSRBARL registers, respectively. Follow this with a sync
466 lis r0, CONFIG_SYS_CCSRBAR_PHYS_HIGH@h
467 ori r0, r0, CONFIG_SYS_CCSRBAR_PHYS_HIGH@l
468 lis r1, CONFIG_SYS_CCSRBAR_PHYS_LOW@h
469 ori r1, r1, CONFIG_SYS_CCSRBAR_PHYS_LOW@l
471 ori r2, r2, CCSRAR_C@l
473 stw r0, 0(r9) /* Write to CCSRBARH */
474 sync /* Make sure we write to CCSRBARH first */
475 stw r1, 4(r9) /* Write to CCSRBARL */
479 * Write a 1 to the commit bit (C) of CCSRAR at the old location.
480 * Follow this with a sync instruction.
485 /* Delete the temporary LAW */
494 #else /* #ifdef CONFIG_FSL_CORENET */
498 * Read the current value of CCSRBAR using a load word instruction
499 * followed by an isync. This forces all accesses to configuration
506 /* CONFIG_SYS_CCSRBAR_PHYS right shifted by 12 */
507 #define CCSRBAR_PHYS_RS12 ((CONFIG_SYS_CCSRBAR_PHYS_HIGH << 20) | \
508 (CONFIG_SYS_CCSRBAR_PHYS_LOW >> 12))
510 /* Write the new value to CCSRBAR. */
511 lis r0, CCSRBAR_PHYS_RS12@h
512 ori r0, r0, CCSRBAR_PHYS_RS12@l
517 * The manual says to perform a load of an address that does not
518 * access configuration space or the on-chip SRAM using an existing TLB,
519 * but that doesn't appear to be necessary. We will do the isync,
525 * Read the contents of CCSRBAR from its new location, followed by
531 #endif /* #ifdef CONFIG_FSL_CORENET */
533 /* Delete the temporary TLBs */
535 lis r0, FSL_BOOKE_MAS0(0, 0, 0)@h
536 ori r0, r0, FSL_BOOKE_MAS0(0, 0, 0)@l
538 lis r2, FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR, (MAS2_I|MAS2_G))@h
539 ori r2, r2, FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR, (MAS2_I|MAS2_G))@l
547 lis r0, FSL_BOOKE_MAS0(0, 1, 0)@h
548 ori r0, r0, FSL_BOOKE_MAS0(0, 1, 0)@l
549 lis r2, FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR + 0x1000, (MAS2_I|MAS2_G))@h
550 ori r2, r2, FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR + 0x1000, (MAS2_I|MAS2_G))@l
556 #endif /* #if (CONFIG_SYS_CCSRBAR_DEFAULT != CONFIG_SYS_CCSRBAR_PHYS) */
558 create_init_ram_area:
559 lis r6,FSL_BOOKE_MAS0(1, 15, 0)@h
560 ori r6,r6,FSL_BOOKE_MAS0(1, 15, 0)@l
562 #if !defined(CONFIG_SYS_RAMBOOT) && !defined(CONFIG_SECURE_BOOT)
563 /* create a temp mapping in AS=1 to the 4M boot window */
564 lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_4M)@h
565 ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_4M)@l
567 lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_MONITOR_BASE & 0xffc00000, (MAS2_I|MAS2_G))@h
568 ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_MONITOR_BASE & 0xffc00000, (MAS2_I|MAS2_G))@l
570 /* The 85xx has the default boot window 0xff800000 - 0xffffffff */
571 lis r9,FSL_BOOKE_MAS3(0xffc00000, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h
572 ori r9,r9,FSL_BOOKE_MAS3(0xffc00000, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l
573 #elif !defined(CONFIG_SYS_RAMBOOT) && defined(CONFIG_SECURE_BOOT)
574 /* create a temp mapping in AS = 1 for Flash mapping
575 * created by PBL for ISBC code
577 lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_1M)@h
578 ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_1M)@l
580 lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_MONITOR_BASE, (MAS2_I|MAS2_G))@h
581 ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_MONITOR_BASE, (MAS2_I|MAS2_G))@l
583 lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_PBI_FLASH_WINDOW, 0,
584 (MAS3_SX|MAS3_SW|MAS3_SR))@h
585 ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_PBI_FLASH_WINDOW, 0,
586 (MAS3_SX|MAS3_SW|MAS3_SR))@l
589 * create a temp mapping in AS=1 to the 1M CONFIG_SYS_MONITOR_BASE space, the main
590 * image has been relocated to CONFIG_SYS_MONITOR_BASE on the second stage.
592 lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_1M)@h
593 ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_1M)@l
595 lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_MONITOR_BASE, (MAS2_I|MAS2_G))@h
596 ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_MONITOR_BASE, (MAS2_I|MAS2_G))@l
598 lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_MONITOR_BASE, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h
599 ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_MONITOR_BASE, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l
610 /* create a temp mapping in AS=1 to the stack */
611 lis r6,FSL_BOOKE_MAS0(1, 14, 0)@h
612 ori r6,r6,FSL_BOOKE_MAS0(1, 14, 0)@l
614 lis r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_16K)@h
615 ori r7,r7,FSL_BOOKE_MAS1(1, 1, 0, 1, BOOKE_PAGESZ_16K)@l
617 lis r8,FSL_BOOKE_MAS2(CONFIG_SYS_INIT_RAM_ADDR, 0)@h
618 ori r8,r8,FSL_BOOKE_MAS2(CONFIG_SYS_INIT_RAM_ADDR, 0)@l
620 #if defined(CONFIG_SYS_INIT_RAM_ADDR_PHYS_LOW) && \
621 defined(CONFIG_SYS_INIT_RAM_ADDR_PHYS_HIGH)
622 lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR_PHYS_LOW, 0,
623 (MAS3_SX|MAS3_SW|MAS3_SR))@h
624 ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR_PHYS_LOW, 0,
625 (MAS3_SX|MAS3_SW|MAS3_SR))@l
626 li r10,CONFIG_SYS_INIT_RAM_ADDR_PHYS_HIGH
629 lis r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@h
630 ori r9,r9,FSL_BOOKE_MAS3(CONFIG_SYS_INIT_RAM_ADDR, 0, (MAS3_SX|MAS3_SW|MAS3_SR))@l
641 lis r6,MSR_IS|MSR_DS@h
642 ori r6,r6,MSR_IS|MSR_DS@l
644 ori r7,r7,switch_as@l
651 /* L1 DCache is used for initial RAM */
653 /* Allocate Initial RAM in data cache.
655 lis r3,CONFIG_SYS_INIT_RAM_ADDR@h
656 ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l
659 /* cache size * 1024 / (2 * L1 line size) */
660 slwi r2, r2, (10 - 1 - L1_CACHE_SHIFT)
666 addi r3,r3,CONFIG_SYS_CACHELINE_SIZE
669 /* Jump out the last 4K page and continue to 'normal' start */
670 #ifdef CONFIG_SYS_RAMBOOT
673 /* Calculate absolute address in FLASH and jump there */
674 /*--------------------------------------------------------------*/
675 lis r3,CONFIG_SYS_MONITOR_BASE@h
676 ori r3,r3,CONFIG_SYS_MONITOR_BASE@l
677 addi r3,r3,_start_cont - _start + _START_OFFSET
685 .long 0x27051956 /* U-BOOT Magic Number */
686 .globl version_string
688 .ascii U_BOOT_VERSION_STRING, "\0"
693 /* Setup the stack in initial RAM,could be L2-as-SRAM or L1 dcache*/
694 lis r1,CONFIG_SYS_INIT_RAM_ADDR@h
695 ori r1,r1,CONFIG_SYS_INIT_SP_OFFSET@l
699 stwu r0,-4(r1) /* Terminate call chain */
701 stwu r1,-8(r1) /* Save back chain and move SP */
702 lis r0,RESET_VECTOR@h /* Address of reset vector */
703 ori r0,r0,RESET_VECTOR@l
704 stwu r1,-8(r1) /* Save back chain and move SP */
705 stw r0,+12(r1) /* Save return addr (underflow vect) */
710 /* switch back to AS = 0 */
711 lis r3,(MSR_CE|MSR_ME|MSR_DE)@h
712 ori r3,r3,(MSR_CE|MSR_ME|MSR_DE)@l
720 /* NOTREACHED - board_init_f() does not return */
722 #ifndef CONFIG_NAND_SPL
723 . = EXC_OFF_SYS_RESET
724 .globl _start_of_vectors
727 /* Critical input. */
728 CRIT_EXCEPTION(0x0100, CriticalInput, CritcalInputException)
731 MCK_EXCEPTION(0x200, MachineCheck, MachineCheckException)
733 /* Data Storage exception. */
734 STD_EXCEPTION(0x0300, DataStorage, UnknownException)
736 /* Instruction Storage exception. */
737 STD_EXCEPTION(0x0400, InstStorage, UnknownException)
739 /* External Interrupt exception. */
740 STD_EXCEPTION(0x0500, ExtInterrupt, ExtIntException)
742 /* Alignment exception. */
745 EXCEPTION_PROLOG(SRR0, SRR1)
750 addi r3,r1,STACK_FRAME_OVERHEAD
751 EXC_XFER_TEMPLATE(Alignment, AlignmentException, MSR_KERNEL, COPY_EE)
753 /* Program check exception */
756 EXCEPTION_PROLOG(SRR0, SRR1)
757 addi r3,r1,STACK_FRAME_OVERHEAD
758 EXC_XFER_TEMPLATE(ProgramCheck, ProgramCheckException,
761 /* No FPU on MPC85xx. This exception is not supposed to happen.
763 STD_EXCEPTION(0x0800, FPUnavailable, UnknownException)
767 * r0 - SYSCALL number
771 addis r11,r0,0 /* get functions table addr */
772 ori r11,r11,0 /* Note: this code is patched in trap_init */
773 addis r12,r0,0 /* get number of functions */
779 rlwinm r0,r0,2,0,31 /* fn_addr = fn_tbl[r0] */
783 li r20,0xd00-4 /* Get stack pointer */
785 subi r12,r12,12 /* Adjust stack pointer */
786 li r0,0xc00+_end_back-SystemCall
787 cmplw 0,r0,r12 /* Check stack overflow */
798 li r12,0xc00+_back-SystemCall
806 mfmsr r11 /* Disable interrupts */
810 SYNC /* Some chip revs need this... */
814 li r12,0xd00-4 /* restore regs */
824 addi r12,r12,12 /* Adjust stack pointer */
832 STD_EXCEPTION(0x0a00, Decrementer, timer_interrupt)
833 STD_EXCEPTION(0x0b00, IntervalTimer, UnknownException)
834 STD_EXCEPTION(0x0c00, WatchdogTimer, UnknownException)
836 STD_EXCEPTION(0x0d00, DataTLBError, UnknownException)
837 STD_EXCEPTION(0x0e00, InstructionTLBError, UnknownException)
839 CRIT_EXCEPTION(0x0f00, DebugBreakpoint, DebugException )
841 .globl _end_of_vectors
845 . = . + (0x100 - ( . & 0xff )) /* align for debug */
848 * This code finishes saving the registers to the exception frame
849 * and jumps to the appropriate handler for the exception.
850 * Register r21 is pointer into trap frame, r1 has new stack pointer.
852 .globl transfer_to_handler
864 andi. r24,r23,0x3f00 /* get vector offset */
868 mtspr SPRG2,r22 /* r1 is now kernel sp */
870 lwz r24,0(r23) /* virtual address of handler */
871 lwz r23,4(r23) /* where to go when done */
876 rfi /* jump to handler, enable MMU */
879 mfmsr r28 /* Disable interrupts */
883 SYNC /* Some chip revs need this... */
898 lwz r2,_NIP(r1) /* Restore environment */
909 mfmsr r28 /* Disable interrupts */
913 SYNC /* Some chip revs need this... */
928 lwz r2,_NIP(r1) /* Restore environment */
939 mfmsr r28 /* Disable interrupts */
943 SYNC /* Some chip revs need this... */
958 lwz r2,_NIP(r1) /* Restore environment */
972 .globl invalidate_icache
975 ori r0,r0,L1CSR1_ICFI
980 blr /* entire I cache */
982 .globl invalidate_dcache
985 ori r0,r0,L1CSR0_DCFI
1005 .globl icache_disable
1009 ori r3,r3,L1CSR1_ICE
1015 .globl icache_status
1018 andi. r3,r3,L1CSR1_ICE
1021 .globl dcache_enable
1024 bl invalidate_dcache
1036 .globl dcache_disable
1040 ori r4,r4,L1CSR0_DCE
1046 .globl dcache_status
1049 andi. r3,r3,L1CSR0_DCE
1072 /*------------------------------------------------------------------------------- */
1074 /* Description: Input 8 bits */
1075 /*------------------------------------------------------------------------------- */
1081 /*------------------------------------------------------------------------------- */
1082 /* Function: out8 */
1083 /* Description: Output 8 bits */
1084 /*------------------------------------------------------------------------------- */
1091 /*------------------------------------------------------------------------------- */
1092 /* Function: out16 */
1093 /* Description: Output 16 bits */
1094 /*------------------------------------------------------------------------------- */
1101 /*------------------------------------------------------------------------------- */
1102 /* Function: out16r */
1103 /* Description: Byte reverse and output 16 bits */
1104 /*------------------------------------------------------------------------------- */
1111 /*------------------------------------------------------------------------------- */
1112 /* Function: out32 */
1113 /* Description: Output 32 bits */
1114 /*------------------------------------------------------------------------------- */
1121 /*------------------------------------------------------------------------------- */
1122 /* Function: out32r */
1123 /* Description: Byte reverse and output 32 bits */
1124 /*------------------------------------------------------------------------------- */
1131 /*------------------------------------------------------------------------------- */
1132 /* Function: in16 */
1133 /* Description: Input 16 bits */
1134 /*------------------------------------------------------------------------------- */
1140 /*------------------------------------------------------------------------------- */
1141 /* Function: in16r */
1142 /* Description: Input 16 bits and byte reverse */
1143 /*------------------------------------------------------------------------------- */
1149 /*------------------------------------------------------------------------------- */
1150 /* Function: in32 */
1151 /* Description: Input 32 bits */
1152 /*------------------------------------------------------------------------------- */
1158 /*------------------------------------------------------------------------------- */
1159 /* Function: in32r */
1160 /* Description: Input 32 bits and byte reverse */
1161 /*------------------------------------------------------------------------------- */
1166 #endif /* !CONFIG_NAND_SPL */
1168 /*------------------------------------------------------------------------------*/
1171 * void write_tlb(mas0, mas1, mas2, mas3, mas7)
1179 #ifdef CONFIG_ENABLE_36BIT_PHYS
1183 #ifdef CONFIG_SYS_BOOK3E_HV
1193 * void relocate_code (addr_sp, gd, addr_moni)
1195 * This "function" does not return, instead it continues in RAM
1196 * after relocating the monitor code.
1200 * r5 = length in bytes
1201 * r6 = cachelinesize
1203 .globl relocate_code
1205 mr r1,r3 /* Set new stack pointer */
1206 mr r9,r4 /* Save copy of Init Data pointer */
1207 mr r10,r5 /* Save copy of Destination Address */
1210 mr r3,r5 /* Destination Address */
1211 lis r4,CONFIG_SYS_MONITOR_BASE@h /* Source Address */
1212 ori r4,r4,CONFIG_SYS_MONITOR_BASE@l
1213 lwz r5,GOT(__init_end)
1215 li r6,CONFIG_SYS_CACHELINE_SIZE /* Cache Line Size */
1220 * New GOT-PTR = (old GOT-PTR - CONFIG_SYS_MONITOR_BASE) + Destination Address
1226 /* First our own GOT */
1228 /* the the one used by the C code */
1238 beq cr1,4f /* In place copy is not necessary */
1239 beq 7f /* Protect against 0 count */
1258 * Now flush the cache: note that we must start from a cache aligned
1259 * address. Otherwise we might miss one cache line.
1263 beq 7f /* Always flush prefetch queue in any case */
1271 sync /* Wait for all dcbst to complete on bus */
1277 7: sync /* Wait for all icbi to complete on bus */
1281 * Re-point the IVPR at RAM
1286 * We are done. Do not return, instead branch to second part of board
1287 * initialization, now running from RAM.
1290 addi r0,r10,in_ram - _start + _START_OFFSET
1292 blr /* NEVER RETURNS! */
1297 * Relocation Function, r12 point to got2+0x8000
1299 * Adjust got2 pointers, no need to check for 0, this code
1300 * already puts a few entries in the table.
1302 li r0,__got2_entries@sectoff@l
1303 la r3,GOT(_GOT2_TABLE_)
1304 lwz r11,GOT(_GOT2_TABLE_)
1316 * Now adjust the fixups and the pointers to the fixups
1317 * in case we need to move ourselves again.
1319 li r0,__fixup_entries@sectoff@l
1320 lwz r3,GOT(_FIXUP_TABLE_)
1336 * Now clear BSS segment
1338 lwz r3,GOT(__bss_start)
1339 lwz r4,GOT(__bss_end__)
1352 mr r3,r9 /* Init Data pointer */
1353 mr r4,r10 /* Destination Address */
1356 #ifndef CONFIG_NAND_SPL
1358 * Copy exception vector code to low memory
1361 * r7: source address, r8: end address, r9: target address
1365 mflr r4 /* save link register */
1367 lwz r7,GOT(_start_of_vectors)
1368 lwz r8,GOT(_end_of_vectors)
1370 li r9,0x100 /* reset vector always at 0x100 */
1373 bgelr /* return if r7>=r8 - just in case */
1383 * relocate `hdlr' and `int_return' entries
1385 li r7,.L_CriticalInput - _start + _START_OFFSET
1387 li r7,.L_MachineCheck - _start + _START_OFFSET
1389 li r7,.L_DataStorage - _start + _START_OFFSET
1391 li r7,.L_InstStorage - _start + _START_OFFSET
1393 li r7,.L_ExtInterrupt - _start + _START_OFFSET
1395 li r7,.L_Alignment - _start + _START_OFFSET
1397 li r7,.L_ProgramCheck - _start + _START_OFFSET
1399 li r7,.L_FPUnavailable - _start + _START_OFFSET
1401 li r7,.L_Decrementer - _start + _START_OFFSET
1403 li r7,.L_IntervalTimer - _start + _START_OFFSET
1404 li r8,_end_of_vectors - _start + _START_OFFSET
1407 addi r7,r7,0x100 /* next exception vector */
1414 mtlr r4 /* restore link register */
1417 .globl unlock_ram_in_cache
1418 unlock_ram_in_cache:
1419 /* invalidate the INIT_RAM section */
1420 lis r3,(CONFIG_SYS_INIT_RAM_ADDR & ~(CONFIG_SYS_CACHELINE_SIZE-1))@h
1421 ori r3,r3,(CONFIG_SYS_INIT_RAM_ADDR & ~(CONFIG_SYS_CACHELINE_SIZE-1))@l
1424 slwi r4,r4,(10 - 1 - L1_CACHE_SHIFT)
1427 addi r3,r3,CONFIG_SYS_CACHELINE_SIZE
1431 /* Invalidate the TLB entries for the cache */
1432 lis r3,CONFIG_SYS_INIT_RAM_ADDR@h
1433 ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l
1446 mfspr r3,SPRN_L1CFG0
1448 rlwinm r5,r3,9,3 /* Extract cache block size */
1449 twlgti r5,1 /* Only 32 and 64 byte cache blocks
1450 * are currently defined.
1453 subfic r6,r5,2 /* r6 = log2(1KiB / cache block size) -
1454 * log2(number of ways)
1456 slw r5,r4,r5 /* r5 = cache block size */
1458 rlwinm r7,r3,0,0xff /* Extract number of KiB in the cache */
1459 mulli r7,r7,13 /* An 8-way cache will require 13
1464 /* save off HID0 and set DCFA */
1466 ori r9,r8,HID0_DCFA@l
1473 1: lwz r3,0(r4) /* Load... */
1481 1: dcbf 0,r4 /* ...and flush. */
1494 #include "fixed_ivor.S"
1496 #endif /* !CONFIG_NAND_SPL */