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[thirdparty/u-boot.git] / arch / m68k / cpu / mcf5445x / start.S
CommitLineData
8ae158cd
TL		 1/*
2 * Copyright (C) 2003 Josef Baumgartner <josef.baumgartner@telex.de>
3 * Based on code from Bernhard Kuhn <bkuhn@metrowerks.com>
4 *
45370e18
AW		 5 * Copyright 2010-2012 Freescale Semiconductor, Inc.
6 * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
7 *
3765b3e7 8 * SPDX-License-Identifier: GPL-2.0+
8ae158cd
TL		 9 */
10
45370e18 11#include <common.h>
25ddd1fb 12#include <asm-offsets.h>
8ae158cd 13#include <config.h>
45370e18 14#include <timestamp.h>
8ae158cd 15#include "version.h"
dd9f054e 16#include <asm/cache.h>
8ae158cd
TL		 17
18#ifndef CONFIG_IDENT_STRING
19#define CONFIG_IDENT_STRING ""
20#endif
21
8ae158cd
TL		 22#define _START _start
23#define _FAULT _fault
24
25#define SAVE_ALL \
26 move.w #0x2700,%sr; /* disable intrs */ \
27 subl #60,%sp; /* space for 15 regs */ \
28 moveml %d0-%d7/%a0-%a6,%sp@;
29
30#define RESTORE_ALL \
31 moveml %sp@,%d0-%d7/%a0-%a6; \
32 addl #60,%sp; /* space for 15 regs */ \
33 rte;
34
45370e18 35#if defined(CONFIG_SERIAL_BOOT)
14d0a02a 36#define ASM_DRAMINIT (asm_dram_init - CONFIG_SYS_TEXT_BASE + CONFIG_SYS_INIT_RAM_ADDR)
45370e18 37#define ASM_DRAMINIT_N (asm_dram_init - TEXT_BASE)
14d0a02a 38#define ASM_SBF_IMG_HDR (asm_sbf_img_hdr - CONFIG_SYS_TEXT_BASE + CONFIG_SYS_INIT_RAM_ADDR)
9f751551
TL		 39#endif
40
8ae158cd 41.text
9f751551 42
8ae158cd
TL		 43/*
44 * Vector table. This is used for initial platform startup.
45 * These vectors are to catch any un-intended traps.
46 */
47_vectors:
45370e18 48#if defined(CONFIG_SERIAL_BOOT)
9f751551
TL		 49
50INITSP: .long 0 /* Initial SP */
45370e18 51#ifdef CONFIG_CF_SBF
9f751551 52INITPC: .long ASM_DRAMINIT /* Initial PC */
45370e18
AW		 53#endif
54#ifdef CONFIG_SYS_NAND_BOOT
55INITPC: .long ASM_DRAMINIT_N /* Initial PC */
56#endif
9f751551
TL		 57
58#else
59
60INITSP: .long 0 /* Initial SP */
61INITPC: .long _START /* Initial PC */
62
63#endif
8ae158cd 64
8ae158cd
TL		 65vector02: .long _FAULT /* Access Error */
66vector03: .long _FAULT /* Address Error */
67vector04: .long _FAULT /* Illegal Instruction */
68vector05: .long _FAULT /* Reserved */
69vector06: .long _FAULT /* Reserved */
70vector07: .long _FAULT /* Reserved */
71vector08: .long _FAULT /* Privilege Violation */
72vector09: .long _FAULT /* Trace */
73vector0A: .long _FAULT /* Unimplemented A-Line */
74vector0B: .long _FAULT /* Unimplemented F-Line */
75vector0C: .long _FAULT /* Debug Interrupt */
76vector0D: .long _FAULT /* Reserved */
77vector0E: .long _FAULT /* Format Error */
78vector0F: .long _FAULT /* Unitialized Int. */
79
80/* Reserved */
81vector10_17:
82.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
83
84vector18: .long _FAULT /* Spurious Interrupt */
85vector19: .long _FAULT /* Autovector Level 1 */
86vector1A: .long _FAULT /* Autovector Level 2 */
87vector1B: .long _FAULT /* Autovector Level 3 */
88vector1C: .long _FAULT /* Autovector Level 4 */
89vector1D: .long _FAULT /* Autovector Level 5 */
90vector1E: .long _FAULT /* Autovector Level 6 */
91vector1F: .long _FAULT /* Autovector Level 7 */
92
45370e18 93#if !defined(CONFIG_SERIAL_BOOT)
9f751551 94
8ae158cd
TL		 95/* TRAP #0 - #15 */
96vector20_2F:
97.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
98.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
99
100/* Reserved */
101vector30_3F:
102.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
103.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
104
105vector64_127:
106.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
107.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
108.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
109.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
110.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
111.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
112.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
113.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
114
115vector128_191:
116.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
117.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
118.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
119.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
120.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
121.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
122.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
123.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
124
125vector192_255:
126.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
127.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
128.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
129.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
130.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
131.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
132.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
133.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
9f751551 134#endif
8ae158cd 135
45370e18 136#if defined(CONFIG_SERIAL_BOOT)
9f751551
TL		 137 /* Image header: chksum 4 bytes, len 4 bytes, img dest 4 bytes */
138asm_sbf_img_hdr:
139 .long 0x00000000 /* checksum, not yet implemented */
45370e18 140 .long 0x00040000 /* image length */
14d0a02a 141 .long CONFIG_SYS_TEXT_BASE /* image to be relocated at */
9f751551
TL		 142
143asm_dram_init:
709b384b
TL		 144 move.w #0x2700,%sr /* Mask off Interrupt */
145
45370e18
AW		 146#ifdef CONFIG_SYS_NAND_BOOT
147 /* for assembly stack */
148 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0
149 movec %d0, %RAMBAR1
150
151 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp
152 clr.l %sp@-
153#endif
154
155#ifdef CONFIG_CF_SBF
709b384b
TL		 156 move.l #CONFIG_SYS_INIT_RAM_ADDR, %d0
157 movec %d0, %VBR
158
6d0f6bcf 159 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0
709b384b
TL		 160 movec %d0, %RAMBAR1
161
162 /* initialize general use internal ram */
163 move.l #0, %d0
dd9f054e
TL		 164 move.l #(ICACHE_STATUS), %a1 /* icache */
165 move.l #(DCACHE_STATUS), %a2 /* dcache */
709b384b
TL		 166 move.l %d0, (%a1)
167 move.l %d0, (%a2)
709b384b
TL		 168
169 /* invalidate and disable cache */
dd9f054e 170 move.l #(CONFIG_SYS_ICACHE_INV + CONFIG_SYS_DCACHE_INV), %d0
709b384b
TL		 171 movec %d0, %CACR /* Invalidate cache */
172 move.l #0, %d0
173 movec %d0, %ACR0
174 movec %d0, %ACR1
175 movec %d0, %ACR2
176 movec %d0, %ACR3
177
6d0f6bcf 178 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp
9f751551
TL		 179 clr.l %sp@-
180
181 /* Must disable global address */
182 move.l #0xFC008000, %a1
6d0f6bcf 183 move.l #(CONFIG_SYS_CS0_BASE), (%a1)
9f751551 184 move.l #0xFC008008, %a1
6d0f6bcf 185 move.l #(CONFIG_SYS_CS0_CTRL), (%a1)
9f751551 186 move.l #0xFC008004, %a1
6d0f6bcf 187 move.l #(CONFIG_SYS_CS0_MASK), (%a1)
45370e18
AW		 188#endif /* CONFIG_CF_SBF */
189
190#ifdef CONFIG_MCF5441x
191 /* TC: enable all peripherals,
192 in the future only enable certain peripherals */
193 move.l #0xFC04002D, %a1
9f751551 194
45370e18
AW		 195#if defined(CONFIG_CF_SBF)
196 move.b #23, (%a1) /* dspi */
197#endif
198 move.b #46, (%a1) /* DDR */
199
200 /* slew settings */
201 move.l #0xEC094060, %a1
202 move.b #0, (%a1)
203
204 /* use vco instead of cpu*2 clock for ddr clock */
205 move.l #0xEC09001A, %a1
206 move.w #0xE01D, (%a1)
207
208 /* DDR settings */
209 move.l #0xFC0B8180, %a1
210 move.l #0x00000000, (%a1)
211 move.l #0x40000000, (%a1)
212
213 move.l #0xFC0B81AC, %a1
214 move.l #0x01030203, (%a1)
215
216 move.l #0xFC0B8000, %a1
217 move.l #0x01010101, (%a1)+ /* 0x00 */
218 move.l #0x00000101, (%a1)+ /* 0x04 */
219 move.l #0x01010100, (%a1)+ /* 0x08 */
220 move.l #0x01010000, (%a1)+ /* 0x0C */
221 move.l #0x00010101, (%a1)+ /* 0x10 */
222 move.l #0xFC0B8018, %a1
223 move.l #0x00010100, (%a1)+ /* 0x18 */
224 move.l #0x00000001, (%a1)+ /* 0x1C */
225 move.l #0x01000001, (%a1)+ /* 0x20 */
226 move.l #0x00000100, (%a1)+ /* 0x24 */
227 move.l #0x00010001, (%a1)+ /* 0x28 */
228 move.l #0x00000200, (%a1)+ /* 0x2C */
229 move.l #0x01000002, (%a1)+ /* 0x30 */
230 move.l #0x00000000, (%a1)+ /* 0x34 */
231 move.l #0x00000100, (%a1)+ /* 0x38 */
232 move.l #0x02000100, (%a1)+ /* 0x3C */
233 move.l #0x02000407, (%a1)+ /* 0x40 */
234 move.l #0x02030007, (%a1)+ /* 0x44 */
235 move.l #0x02000100, (%a1)+ /* 0x48 */
236 move.l #0x0A030203, (%a1)+ /* 0x4C */
237 move.l #0x00020708, (%a1)+ /* 0x50 */
238 move.l #0x00050008, (%a1)+ /* 0x54 */
239 move.l #0x04030002, (%a1)+ /* 0x58 */
240 move.l #0x00000004, (%a1)+ /* 0x5C */
241 move.l #0x020A0000, (%a1)+ /* 0x60 */
242 move.l #0x0C00000E, (%a1)+ /* 0x64 */
243 move.l #0x00002004, (%a1)+ /* 0x68 */
244 move.l #0x00000000, (%a1)+ /* 0x6C */
245 move.l #0x00100010, (%a1)+ /* 0x70 */
246 move.l #0x00100010, (%a1)+ /* 0x74 */
247 move.l #0x00000000, (%a1)+ /* 0x78 */
248 move.l #0x07990000, (%a1)+ /* 0x7C */
249 move.l #0xFC0B80A0, %a1
250 move.l #0x00000000, (%a1)+ /* 0xA0 */
251 move.l #0x00C80064, (%a1)+ /* 0xA4 */
252 move.l #0x44520002, (%a1)+ /* 0xA8 */
253 move.l #0x00C80023, (%a1)+ /* 0xAC */
254 move.l #0xFC0B80B4, %a1
255 move.l #0x0000C350, (%a1) /* 0xB4 */
256 move.l #0xFC0B80E0, %a1
257 move.l #0x04000000, (%a1)+ /* 0xE0 */
258 move.l #0x03000304, (%a1)+ /* 0xE4 */
259 move.l #0x40040000, (%a1)+ /* 0xE8 */
260 move.l #0xC0004004, (%a1)+ /* 0xEC */
261 move.l #0x0642C000, (%a1)+ /* 0xF0 */
262 move.l #0x00000642, (%a1)+ /* 0xF4 */
263 move.l #0xFC0B8024, %a1
264 tpf
265 move.l #0x01000100, (%a1) /* 0x24 */
266
267 move.l #0x2000, %d1
268 jsr asm_delay
269#endif /* CONFIG_MCF5441x */
270
271#ifdef CONFIG_MCF5445x
709b384b 272 /* Dram Initialization a1, a2, and d0 */
9f751551
TL		 273 /* mscr sdram */
274 move.l #0xFC0A4074, %a1
6d0f6bcf 275 move.b #(CONFIG_SYS_SDRAM_DRV_STRENGTH), (%a1)
9f751551
TL		 276 nop
277
278 /* SDRAM Chip 0 and 1 */
279 move.l #0xFC0B8110, %a1
280 move.l #0xFC0B8114, %a2
281
282 /* calculate the size */
283 move.l #0x13, %d1
6d0f6bcf
JCPV		 284 move.l #(CONFIG_SYS_SDRAM_SIZE), %d2
285#ifdef CONFIG_SYS_SDRAM_BASE1
9f751551
TL		 286 lsr.l #1, %d2
287#endif
288
289dramsz_loop:
290 lsr.l #1, %d2
291 add.l #1, %d1
292 cmp.l #1, %d2
293 bne dramsz_loop
45370e18
AW		 294#ifdef CONFIG_SYS_NAND_BOOT
295 beq asm_nand_chk_status
296#endif
9f751551 297 /* SDRAM Chip 0 and 1 */
6d0f6bcf 298 move.l #(CONFIG_SYS_SDRAM_BASE), (%a1)
9f751551 299 or.l %d1, (%a1)
6d0f6bcf
JCPV		 300#ifdef CONFIG_SYS_SDRAM_BASE1
301 move.l #(CONFIG_SYS_SDRAM_BASE1), (%a2)
9f751551
TL		 302 or.l %d1, (%a2)
303#endif
304 nop
305
306 /* dram cfg1 and cfg2 */
307 move.l #0xFC0B8008, %a1
6d0f6bcf 308 move.l #(CONFIG_SYS_SDRAM_CFG1), (%a1)
9f751551
TL		 309 nop
310 move.l #0xFC0B800C, %a2
6d0f6bcf 311 move.l #(CONFIG_SYS_SDRAM_CFG2), (%a2)
9f751551
TL		 312 nop
313
314 move.l #0xFC0B8000, %a1 /* Mode */
315 move.l #0xFC0B8004, %a2 /* Ctrl */
316
9f751551 317 /* Issue PALL */
6d0f6bcf 318 move.l #(CONFIG_SYS_SDRAM_CTRL + 2), (%a2)
9f751551
TL		 319 nop
320
709b384b 321#ifdef CONFIG_M54455EVB
9f751551 322 /* Issue LEMR */
6d0f6bcf 323 move.l #(CONFIG_SYS_SDRAM_EMOD + 0x408), (%a1)
9f751551 324 nop
6d0f6bcf 325 move.l #(CONFIG_SYS_SDRAM_MODE + 0x300), (%a1)
9f751551 326 nop
9f751551
TL		 327#endif
328
709b384b
TL		 329 move.l #1000, %d1
330 jsr asm_delay
331
9f751551 332 /* Issue PALL */
6d0f6bcf 333 move.l #(CONFIG_SYS_SDRAM_CTRL + 2), (%a2)
9f751551
TL		 334 nop
335
336 /* Perform two refresh cycles */
6d0f6bcf 337 move.l #(CONFIG_SYS_SDRAM_CTRL + 4), %d0
9f751551
TL		 338 nop
339 move.l %d0, (%a2)
340 move.l %d0, (%a2)
341 nop
342
343#ifdef CONFIG_M54455EVB
6d0f6bcf 344 move.l #(CONFIG_SYS_SDRAM_MODE + 0x200), (%a1)
9f751551
TL		 345 nop
346#elif defined(CONFIG_M54451EVB)
347 /* Issue LEMR */
c3a9e637 348 move.l #(CONFIG_SYS_SDRAM_MODE), (%a1)
9f751551 349 nop
c3a9e637 350 move.l #(CONFIG_SYS_SDRAM_EMOD), (%a1)
9f751551
TL		 351#endif
352
709b384b
TL		 353 move.l #500, %d1
354 jsr asm_delay
9f751551 355
709b384b
TL		 356 move.l #(CONFIG_SYS_SDRAM_CTRL), %d1
357 and.l #0x7FFFFFFF, %d1
9f751551 358#ifdef CONFIG_M54455EVB
709b384b 359 or.l #0x10000C00, %d1
9f751551 360#elif defined(CONFIG_M54451EVB)
709b384b 361 or.l #0x10000C00, %d1
9f751551 362#endif
709b384b 363 move.l %d1, (%a2)
9f751551
TL		 364 nop
365
709b384b
TL		 366 move.l #2000, %d1
367 jsr asm_delay
45370e18 368#endif /* CONFIG_MCF5445x */
709b384b 369
45370e18 370#ifdef CONFIG_CF_SBF
9f751551
TL		 371 /*
372 * DSPI Initialization
373 * a0 - general, sram - 0x80008000 - 32, see M54455EVB.h
374 * a1 - dspi status
375 * a2 - dtfr
376 * a3 - drfr
377 * a4 - Dst addr
378 */
379 /* Enable pins for DSPI mode - chip-selects are enabled later */
709b384b 380asm_dspi_init:
45370e18
AW		 381#ifdef CONFIG_MCF5441x
382 move.l #0xEC09404E, %a1
383 move.l #0xEC09404F, %a2
384 move.b #0xFF, (%a1)
385 move.b #0x80, (%a2)
386#endif
387
388#ifdef CONFIG_MCF5445x
9f751551
TL		 389 move.l #0xFC0A4063, %a0
390 move.b #0x7F, (%a0)
45370e18 391#endif
9f751551
TL		 392 /* Configure DSPI module */
393 move.l #0xFC05C000, %a0
394 move.l #0x80FF0C00, (%a0) /* Master, clear TX/RX FIFO */
395
396 move.l #0xFC05C00C, %a0
45370e18
AW		 397#ifdef CONFIG_MCF5441x
398 move.l #0x3E000016, (%a0)
399#endif
400#ifdef CONFIG_MCF5445x
9f751551 401 move.l #0x3E000011, (%a0)
45370e18 402#endif
9f751551
TL		 403
404 move.l #0xFC05C034, %a2 /* dtfr */
405 move.l #0xFC05C03B, %a3 /* drfr */
406
407 move.l #(ASM_SBF_IMG_HDR + 4), %a1
408 move.l (%a1)+, %d5
409 move.l (%a1), %a4
410
6d0f6bcf
JCPV		 411 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_SBFHDR_DATA_OFFSET), %a0
412 move.l #(CONFIG_SYS_SBFHDR_SIZE), %d4
9f751551
TL		 413
414 move.l #0xFC05C02C, %a1 /* dspi status */
415
416 /* Issue commands and address */
417 move.l #0x8002000B, %d2 /* Fast Read Cmd */
418 jsr asm_dspi_wr_status
419 jsr asm_dspi_rd_status
420
421 move.l #0x80020000, %d2 /* Address byte 2 */
422 jsr asm_dspi_wr_status
423 jsr asm_dspi_rd_status
424
425 move.l #0x80020000, %d2 /* Address byte 1 */
426 jsr asm_dspi_wr_status
427 jsr asm_dspi_rd_status
428
429 move.l #0x80020000, %d2 /* Address byte 0 */
430 jsr asm_dspi_wr_status
431 jsr asm_dspi_rd_status
432
433 move.l #0x80020000, %d2 /* Dummy Wr and Rd */
434 jsr asm_dspi_wr_status
435 jsr asm_dspi_rd_status
436
437 /* Transfer serial boot header to sram */
438asm_dspi_rd_loop1:
439 move.l #0x80020000, %d2
440 jsr asm_dspi_wr_status
441 jsr asm_dspi_rd_status
442
443 move.b %d1, (%a0) /* read, copy to dst */
444
445 add.l #1, %a0 /* inc dst by 1 */
446 sub.l #1, %d4 /* dec cnt by 1 */
447 bne asm_dspi_rd_loop1
448
449 /* Transfer u-boot from serial flash to memory */
450asm_dspi_rd_loop2:
451 move.l #0x80020000, %d2
452 jsr asm_dspi_wr_status
453 jsr asm_dspi_rd_status
454
455 move.b %d1, (%a4) /* read, copy to dst */
456
457 add.l #1, %a4 /* inc dst by 1 */
458 sub.l #1, %d5 /* dec cnt by 1 */
459 bne asm_dspi_rd_loop2
460
461 move.l #0x00020000, %d2 /* Terminate */
462 jsr asm_dspi_wr_status
463 jsr asm_dspi_rd_status
464
465 /* jump to memory and execute */
14d0a02a 466 move.l #(CONFIG_SYS_TEXT_BASE + 0x400), %a0
9f751551
TL		 467 jmp (%a0)
468
469asm_dspi_wr_status:
470 move.l (%a1), %d0 /* status */
471 and.l #0x0000F000, %d0
472 cmp.l #0x00003000, %d0
473 bgt asm_dspi_wr_status
474
475 move.l %d2, (%a2)
476 rts
477
478asm_dspi_rd_status:
479 move.l (%a1), %d0 /* status */
480 and.l #0x000000F0, %d0
481 lsr.l #4, %d0
482 cmp.l #0, %d0
483 beq asm_dspi_rd_status
484
485 move.b (%a3), %d1
486 rts
45370e18
AW		 487#endif /* CONFIG_CF_SBF */
488
489#ifdef CONFIG_SYS_NAND_BOOT
490 /* copy 4 boot pages to dram as soon as possible */
491 /* each page is 996 bytes (1056 total with 60 ECC bytes */
492 move.l #0x00000000, %a1 /* src */
493 move.l #TEXT_BASE, %a2 /* dst */
494 move.l #0x3E0, %d0 /* sz in long */
495
496asm_boot_nand_copy:
497 move.l (%a1)+, (%a2)+
498 subq.l #1, %d0
499 bne asm_boot_nand_copy
500
501 /* jump to memory and execute */
502 move.l #(asm_nand_init), %a0
503 jmp (%a0)
504
505asm_nand_init:
506 /* exit nand boot-mode */
507 move.l #0xFC0FFF30, %a1
508 or.l #0x00000040, %d1
509 move.l %d1, (%a1)
510
511 /* initialize general use internal ram */
512 move.l #0, %d0
513 move.l #(CACR_STATUS), %a1 /* CACR */
514 move.l #(ICACHE_STATUS), %a2 /* icache */
515 move.l #(DCACHE_STATUS), %a3 /* dcache */
516 move.l %d0, (%a1)
517 move.l %d0, (%a2)
518 move.l %d0, (%a3)
519
520 /* invalidate and disable cache */
521 move.l #0x01004100, %d0 /* Invalidate cache cmd */
522 movec %d0, %CACR /* Invalidate cache */
523 move.l #0, %d0
524 movec %d0, %ACR0
525 movec %d0, %ACR1
526 movec %d0, %ACR2
527 movec %d0, %ACR3
528
529 /* Must disable global address */
530 move.l #0xFC008000, %a1
531 move.l #(CONFIG_SYS_CS0_BASE), (%a1)
532 move.l #0xFC008008, %a1
533 move.l #(CONFIG_SYS_CS0_CTRL), (%a1)
534 move.l #0xFC008004, %a1
535 move.l #(CONFIG_SYS_CS0_MASK), (%a1)
536
537 /* NAND port configuration */
538 move.l #0xEC094048, %a1
539 move.b #0xFD, (%a1)+
540 move.b #0x5F, (%a1)+
541 move.b #0x04, (%a1)+
542
543 /* reset nand */
544 move.l #0xFC0FFF38, %a1 /* isr */
545 move.l #0x000e0000, (%a1)
546 move.l #0xFC0FFF08, %a2
547 move.l #0x00000000, (%a2)+ /* car */
548 move.l #0x11000000, (%a2)+ /* rar */
549 move.l #0x00000000, (%a2)+ /* rpt */
550 move.l #0x00000000, (%a2)+ /* rai */
551 move.l #0xFC0FFF2c, %a2 /* cfg */
552 move.l #0x00000000, (%a2)+ /* secsz */
553 move.l #0x000e0681, (%a2)+
554 move.l #0xFC0FFF04, %a2 /* cmd2 */
555 move.l #0xFF404001, (%a2)
556 move.l #0x000e0000, (%a1)
557
558 move.l #0x2000, %d1
559 jsr asm_delay
560
561 /* setup nand */
562 move.l #0xFC0FFF00, %a1
563 move.l #0x30700000, (%a1)+ /* cmd1 */
564 move.l #0x007EF000, (%a1)+ /* cmd2 */
565
566 move.l #0xFC0FFF2C, %a1
567 move.l #0x00000841, (%a1)+ /* secsz */
568 move.l #0x000e0681, (%a1)+ /* cfg */
569
570 move.l #100, %d4 /* 100 pages ~200KB */
571 move.l #4, %d2 /* start at 4 */
572 move.l #0xFC0FFF04, %a0 /* cmd2 */
573 move.l #0xFC0FFF0C, %a1 /* rar */
574 move.l #(TEXT_BASE + 0xF80), %a2 /* dst */
575
576asm_nand_read:
577 move.l #0x11000000, %d0 /* rar */
578 or.l %d2, %d0
579 move.l %d0, (%a1)
580 add.l #1, %d2
581
582 move.l (%a0), %d0 /* cmd2 */
583 or.l #1, %d0
584 move.l %d0, (%a0)
585
586 move.l #0x200, %d1
587 jsr asm_delay
588
589asm_nand_chk_status:
590 move.l #0xFC0FFF38, %a4 /* isr */
591 move.l (%a4), %d0
592 and.l #0x40000000, %d0
593 tst.l %d0
594 beq asm_nand_chk_status
595
596 move.l #0xFC0FFF38, %a4 /* isr */
597 move.l (%a4), %d0
598 or.l #0x000E0000, %d0
599 move.l %d0, (%a4)
600
601 move.l #0x200, %d3
602 move.l #0xFC0FC000, %a3 /* buf 1 */
603asm_nand_copy:
604 move.l (%a3)+, (%a2)+
605 subq.l #1, %d3
606 bgt asm_nand_copy
607
608 subq.l #1, %d4
609 bgt asm_nand_read
610
611 /* jump to memory and execute */
612 move.l #(TEXT_BASE + 0x400), %a0
613 jmp (%a0)
614
615#endif /* CONFIG_SYS_NAND_BOOT */
709b384b
TL		 616
617asm_delay:
618 nop
619 subq.l #1, %d1
620 bne asm_delay
621 rts
45370e18 622#endif /* CONFIG_CF_SBF || CONFIG_NAND_U_BOOT */
9f751551
TL		 623
624 .text
625 . = 0x400
8ae158cd
TL		 626 .globl _start
627_start:
45370e18 628#if !defined(CONFIG_SERIAL_BOOT)
8ae158cd
TL		 629 nop
630 nop
631 move.w #0x2700,%sr /* Mask off Interrupt */
632
633 /* Set vector base register at the beginning of the Flash */
6d0f6bcf 634 move.l #CONFIG_SYS_FLASH_BASE, %d0
8ae158cd
TL		 635 movec %d0, %VBR
636
6d0f6bcf 637 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0
225a24b5 638 movec %d0, %RAMBAR1
8ae158cd
TL		 639
640 /* initialize general use internal ram */
641 move.l #0, %d0
dd9f054e
TL		 642 move.l #(ICACHE_STATUS), %a1 /* icache */
643 move.l #(DCACHE_STATUS), %a2 /* dcache */
8ae158cd
TL		 644 move.l %d0, (%a1)
645 move.l %d0, (%a2)
8ae158cd
TL		 646
647 /* invalidate and disable cache */
dd9f054e 648 move.l #(CONFIG_SYS_ICACHE_INV + CONFIG_SYS_DCACHE_INV), %d0
8ae158cd
TL		 649 movec %d0, %CACR /* Invalidate cache */
650 move.l #0, %d0
651 movec %d0, %ACR0
652 movec %d0, %ACR1
653 movec %d0, %ACR2
654 movec %d0, %ACR3
45370e18
AW		 655#else
656 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0
657 movec %d0, %RAMBAR1
658#endif
8ae158cd
TL		 659
660 /* set stackpointer to end of internal ram to get some stackspace for
661 the first c-code */
6d0f6bcf 662 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp
8ae158cd
TL		 663 clr.l %sp@-
664
665 move.l #__got_start, %a5 /* put relocation table address to a5 */
666
667 bsr cpu_init_f /* run low-level CPU init code (from flash) */
668 bsr board_init_f /* run low-level board init code (from flash) */
669
670 /* board_init_f() does not return */
671
672/*------------------------------------------------------------------------------*/
673
674/*
675 * void relocate_code (addr_sp, gd, addr_moni)
676 *
677 * This "function" does not return, instead it continues in RAM
678 * after relocating the monitor code.
679 *
680 * r3 = dest
681 * r4 = src
682 * r5 = length in bytes
683 * r6 = cachelinesize
684 */
685 .globl relocate_code
686relocate_code:
687 link.w %a6,#0
688 move.l 8(%a6), %sp /* set new stack pointer */
689
690 move.l 12(%a6), %d0 /* Save copy of Global Data pointer */
691 move.l 16(%a6), %a0 /* Save copy of Destination Address */
692
6d0f6bcf 693 move.l #CONFIG_SYS_MONITOR_BASE, %a1
8ae158cd
TL		 694 move.l #__init_end, %a2
695 move.l %a0, %a3
696
697 /* copy the code to RAM */
6981:
699 move.l (%a1)+, (%a3)+
700 cmp.l %a1,%a2
701 bgt.s 1b
702
703/*
704 * We are done. Do not return, instead branch to second part of board
705 * initialization, now running from RAM.
706 */
707 move.l %a0, %a1
6d0f6bcf 708 add.l #(in_ram - CONFIG_SYS_MONITOR_BASE), %a1
8ae158cd
TL		 709 jmp (%a1)
710
711in_ram:
712
713clear_bss:
714 /*
715 * Now clear BSS segment
716 */
717 move.l %a0, %a1
6d0f6bcf 718 add.l #(_sbss - CONFIG_SYS_MONITOR_BASE),%a1
8ae158cd 719 move.l %a0, %d1
6d0f6bcf 720 add.l #(_ebss - CONFIG_SYS_MONITOR_BASE),%d1
8ae158cd
TL		 7216:
722 clr.l (%a1)+
723 cmp.l %a1,%d1
724 bgt.s 6b
725
726 /*
727 * fix got table in RAM
728 */
729 move.l %a0, %a1
6d0f6bcf 730 add.l #(__got_start - CONFIG_SYS_MONITOR_BASE),%a1
8ae158cd
TL		 731 move.l %a1,%a5 /* * fix got pointer register a5 */
732
733 move.l %a0, %a2
6d0f6bcf 734 add.l #(__got_end - CONFIG_SYS_MONITOR_BASE),%a2
8ae158cd
TL		 735
7367:
737 move.l (%a1),%d1
738 sub.l #_start,%d1
739 add.l %a0,%d1
740 move.l %d1,(%a1)+
741 cmp.l %a2, %a1
742 bne 7b
743
744 /* calculate relative jump to board_init_r in ram */
745 move.l %a0, %a1
6d0f6bcf 746 add.l #(board_init_r - CONFIG_SYS_MONITOR_BASE), %a1
8ae158cd
TL		 747
748 /* set parameters for board_init_r */
749 move.l %a0,-(%sp) /* dest_addr */
750 move.l %d0,-(%sp) /* gd */
751 jsr (%a1)
752
753/*------------------------------------------------------------------------------*/
754/* exception code */
755 .globl _fault
756_fault:
3b1e8ac9 757 bra _fault
8ae158cd
TL		 758 .globl _exc_handler
759
760_exc_handler:
761 SAVE_ALL
762 movel %sp,%sp@-
763 bsr exc_handler
764 addql #4,%sp
765 RESTORE_ALL
766
767 .globl _int_handler
768_int_handler:
769 SAVE_ALL
770 movel %sp,%sp@-
771 bsr int_handler
772 addql #4,%sp
773 RESTORE_ALL
774
8ae158cd
TL		 775/*------------------------------------------------------------------------------*/
776
777 .globl version_string
778version_string:
09c2e90c 779 .ascii U_BOOT_VERSION_STRING, "\0"
9b46432f 780 .align 4
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