2 * Copyright (C) 2003 Josef Baumgartner <josef.baumgartner@telex.de>
3 * Based on code from Bernhard Kuhn <bkuhn@metrowerks.com>
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 #include <asm-offsets.h>
27 #include <asm/cache.h>
29 #ifndef CONFIG_IDENT_STRING
30 #define CONFIG_IDENT_STRING ""
37 move.w #0x2700,%sr; /* disable intrs */ \
38 subl #60,%sp; /* space for 15 regs */ \
39 moveml %d0-%d7/%a0-%a6,%sp@;
42 moveml %sp@,%d0-%d7/%a0-%a6; \
43 addl #60,%sp; /* space for 15 regs */ \
46 #if defined(CONFIG_CF_SBF)
47 #define ASM_DRAMINIT (asm_dram_init - CONFIG_SYS_TEXT_BASE + CONFIG_SYS_INIT_RAM_ADDR)
48 #define ASM_SBF_IMG_HDR (asm_sbf_img_hdr - CONFIG_SYS_TEXT_BASE + CONFIG_SYS_INIT_RAM_ADDR)
53 * Vector table. This is used for initial platform startup.
54 * These vectors are to catch any un-intended traps.
58 #if defined(CONFIG_CF_SBF)
59 INITSP: .long 0 /* Initial SP */
60 INITPC: .long ASM_DRAMINIT /* Initial PC */
62 INITSP: .long 0 /* Initial SP */
63 INITPC: .long _START /* Initial PC */
66 vector02: .long _FAULT /* Access Error */
67 vector03: .long _FAULT /* Address Error */
68 vector04: .long _FAULT /* Illegal Instruction */
69 vector05: .long _FAULT /* Reserved */
70 vector06: .long _FAULT /* Reserved */
71 vector07: .long _FAULT /* Reserved */
72 vector08: .long _FAULT /* Privilege Violation */
73 vector09: .long _FAULT /* Trace */
74 vector0A: .long _FAULT /* Unimplemented A-Line */
75 vector0B: .long _FAULT /* Unimplemented F-Line */
76 vector0C: .long _FAULT /* Debug Interrupt */
77 vector0D: .long _FAULT /* Reserved */
78 vector0E: .long _FAULT /* Format Error */
79 vector0F: .long _FAULT /* Unitialized Int. */
83 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
85 vector18: .long _FAULT /* Spurious Interrupt */
86 vector19: .long _FAULT /* Autovector Level 1 */
87 vector1A: .long _FAULT /* Autovector Level 2 */
88 vector1B: .long _FAULT /* Autovector Level 3 */
89 vector1C: .long _FAULT /* Autovector Level 4 */
90 vector1D: .long _FAULT /* Autovector Level 5 */
91 vector1E: .long _FAULT /* Autovector Level 6 */
92 vector1F: .long _FAULT /* Autovector Level 7 */
94 #if !defined(CONFIG_CF_SBF)
97 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
98 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
102 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
103 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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
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
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
136 #if defined(CONFIG_CF_SBF)
137 /* Image header: chksum 4 bytes, len 4 bytes, img dest 4 bytes */
139 .long 0x00000000 /* checksum, not yet implemented */
140 .long 0x00020000 /* image length */
141 .long CONFIG_SYS_TEXT_BASE /* image to be relocated at */
144 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0
145 movec %d0, %RAMBAR1 /* init Rambar */
146 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp
149 /* Must disable global address */
150 move.l #0xFC008000, %a1
151 move.l #(CONFIG_SYS_CS0_BASE), (%a1)
152 move.l #0xFC008008, %a1
153 move.l #(CONFIG_SYS_CS0_CTRL), (%a1)
154 move.l #0xFC008004, %a1
155 move.l #(CONFIG_SYS_CS0_MASK), (%a1)
158 * Dram Initialization
162 move.l #0xFC0A4074, %a1
163 move.b #(CONFIG_SYS_SDRAM_DRV_STRENGTH), (%a1)
166 /* SDRAM Chip 0 and 1 */
167 move.l #0xFC0B8110, %a1
168 move.l #0xFC0B8114, %a2
170 /* calculate the size */
172 move.l #(CONFIG_SYS_SDRAM_SIZE), %d2
173 #ifdef CONFIG_SYS_SDRAM_BASE1
183 /* SDRAM Chip 0 and 1 */
184 move.l #(CONFIG_SYS_SDRAM_BASE), (%a1)
186 #ifdef CONFIG_SYS_SDRAM_BASE1
187 move.l #(CONFIG_SYS_SDRAM_BASE1), (%a2)
192 /* dram cfg1 and cfg2 */
193 move.l #0xFC0B8008, %a1
194 move.l #(CONFIG_SYS_SDRAM_CFG1), (%a1)
196 move.l #0xFC0B800C, %a2
197 move.l #(CONFIG_SYS_SDRAM_CFG2), (%a2)
200 move.l #0xFC0B8000, %a1 /* Mode */
201 move.l #0xFC0B8004, %a2 /* Ctrl */
204 move.l #(CONFIG_SYS_SDRAM_CTRL + 2), (%a2)
208 move.l #(CONFIG_SYS_SDRAM_MODE), (%a1)
210 move.l #(CONFIG_SYS_SDRAM_EMOD), (%a1)
220 move.l #(CONFIG_SYS_SDRAM_CTRL + 2), (%a2)
223 /* Perform two refresh cycles */
224 move.l #(CONFIG_SYS_SDRAM_CTRL + 4), %d0
230 move.l #(CONFIG_SYS_SDRAM_CTRL), %d0
231 and.l #0x7FFFFFFF, %d0
232 or.l #0x10000c00, %d0
237 * DSPI Initialization
238 * a0 - general, sram - 0x80008000 - 32, see M52277EVB.h
245 /* Enable pins for DSPI mode - chip-selects are enabled later */
246 move.l #0xFC0A4036, %a0
251 #ifdef CONFIG_SYS_DSPI_CS0
256 #ifdef CONFIG_SYS_DSPI_CS2
257 move.l #0xFC0A4037, %a0
264 /* Configure DSPI module */
265 move.l #0xFC05C000, %a0
266 move.l #0x80FF0C00, (%a0) /* Master, clear TX/RX FIFO */
268 move.l #0xFC05C00C, %a0
269 move.l #0x3E000011, (%a0)
271 move.l #0xFC05C034, %a2 /* dtfr */
272 move.l #0xFC05C03B, %a3 /* drfr */
274 move.l #(ASM_SBF_IMG_HDR + 4), %a1
278 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_SBFHDR_DATA_OFFSET), %a0
279 move.l #(CONFIG_SYS_SBFHDR_SIZE), %d4
281 move.l #0xFC05C02C, %a1 /* dspi status */
283 /* Issue commands and address */
284 move.l #0x8004000B, %d2 /* Fast Read Cmd */
285 jsr asm_dspi_wr_status
286 jsr asm_dspi_rd_status
288 move.l #0x80040000, %d2 /* Address byte 2 */
289 jsr asm_dspi_wr_status
290 jsr asm_dspi_rd_status
292 move.l #0x80040000, %d2 /* Address byte 1 */
293 jsr asm_dspi_wr_status
294 jsr asm_dspi_rd_status
296 move.l #0x80040000, %d2 /* Address byte 0 */
297 jsr asm_dspi_wr_status
298 jsr asm_dspi_rd_status
300 move.l #0x80040000, %d2 /* Dummy Wr and Rd */
301 jsr asm_dspi_wr_status
302 jsr asm_dspi_rd_status
304 /* Transfer serial boot header to sram */
306 move.l #0x80040000, %d2
307 jsr asm_dspi_wr_status
308 jsr asm_dspi_rd_status
310 move.b %d1, (%a0) /* read, copy to dst */
312 add.l #1, %a0 /* inc dst by 1 */
313 sub.l #1, %d4 /* dec cnt by 1 */
314 bne asm_dspi_rd_loop1
316 /* Transfer u-boot from serial flash to memory */
318 move.l #0x80040000, %d2
319 jsr asm_dspi_wr_status
320 jsr asm_dspi_rd_status
322 move.b %d1, (%a4) /* read, copy to dst */
324 add.l #1, %a4 /* inc dst by 1 */
325 sub.l #1, %d5 /* dec cnt by 1 */
326 bne asm_dspi_rd_loop2
328 move.l #0x00040000, %d2 /* Terminate */
329 jsr asm_dspi_wr_status
330 jsr asm_dspi_rd_status
332 /* jump to memory and execute */
333 move.l #(CONFIG_SYS_TEXT_BASE + 0x400), %a0
338 move.l (%a1), %d0 /* status */
339 and.l #0x0000F000, %d0
340 cmp.l #0x00003000, %d0
341 bgt asm_dspi_wr_status
347 move.l (%a1), %d0 /* status */
348 and.l #0x000000F0, %d0
351 beq asm_dspi_rd_status
355 #endif /* CONFIG_CF_SBF */
363 move.w #0x2700,%sr /* Mask off Interrupt */
365 /* Set vector base register at the beginning of the Flash */
366 #if defined(CONFIG_CF_SBF)
367 move.l #CONFIG_SYS_TEXT_BASE, %d0
370 move.l #CONFIG_SYS_FLASH_BASE, %d0
373 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0
377 /* invalidate and disable cache */
378 move.l #CF_CACR_CINV, %d0 /* Invalidate cache cmd */
379 movec %d0, %CACR /* Invalidate cache */
384 /* initialize general use internal ram */
386 move.l #(ICACHE_STATUS), %a1 /* icache */
387 move.l #(DCACHE_STATUS), %a2 /* icache */
391 /* set stackpointer to end of internal ram to get some stackspace for
393 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp
396 move.l #__got_start, %a5 /* put relocation table address to a5 */
398 bsr cpu_init_f /* run low-level CPU init code (from flash) */
399 bsr board_init_f /* run low-level board init code (from flash) */
401 /* board_init_f() does not return */
403 /*------------------------------------------------------------------------------*/
406 * void relocate_code (addr_sp, gd, addr_moni)
408 * This "function" does not return, instead it continues in RAM
409 * after relocating the monitor code.
413 * r5 = length in bytes
419 move.l 8(%a6), %sp /* set new stack pointer */
421 move.l 12(%a6), %d0 /* Save copy of Global Data pointer */
422 move.l 16(%a6), %a0 /* Save copy of Destination Address */
424 move.l #CONFIG_SYS_MONITOR_BASE, %a1
425 move.l #__init_end, %a2
428 /* copy the code to RAM */
430 move.l (%a1)+, (%a3)+
435 * We are done. Do not return, instead branch to second part of board
436 * initialization, now running from RAM.
439 add.l #(in_ram - CONFIG_SYS_MONITOR_BASE), %a1
446 * Now clear BSS segment
449 add.l #(_sbss - CONFIG_SYS_MONITOR_BASE),%a1
451 add.l #(_ebss - CONFIG_SYS_MONITOR_BASE),%d1
458 * fix got table in RAM
461 add.l #(__got_start - CONFIG_SYS_MONITOR_BASE),%a1
462 move.l %a1,%a5 /* * fix got pointer register a5 */
465 add.l #(__got_end - CONFIG_SYS_MONITOR_BASE),%a2
475 /* calculate relative jump to board_init_r in ram */
477 add.l #(board_init_r - CONFIG_SYS_MONITOR_BASE), %a1
479 /* set parameters for board_init_r */
480 move.l %a0,-(%sp) /* dest_addr */
481 move.l %d0,-(%sp) /* gd */
484 /*------------------------------------------------------------------------------*/
506 /*------------------------------------------------------------------------------*/
508 .globl version_string
510 .ascii U_BOOT_VERSION_STRING, "\0"