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>
26 #include <timestamp.h>
28 #include <asm/cache.h>
30 #ifndef CONFIG_IDENT_STRING
31 #define CONFIG_IDENT_STRING ""
38 move.w #0x2700,%sr; /* disable intrs */ \
39 subl #60,%sp; /* space for 15 regs */ \
40 moveml %d0-%d7/%a0-%a6,%sp@;
43 moveml %sp@,%d0-%d7/%a0-%a6; \
44 addl #60,%sp; /* space for 15 regs */ \
47 #if defined(CONFIG_CF_SBF)
48 #define ASM_DRAMINIT (asm_dram_init - CONFIG_SYS_TEXT_BASE + CONFIG_SYS_INIT_RAM_ADDR)
49 #define ASM_SBF_IMG_HDR (asm_sbf_img_hdr - CONFIG_SYS_TEXT_BASE + CONFIG_SYS_INIT_RAM_ADDR)
54 * Vector table. This is used for initial platform startup.
55 * These vectors are to catch any un-intended traps.
59 #if defined(CONFIG_CF_SBF)
60 INITSP: .long 0 /* Initial SP */
61 INITPC: .long ASM_DRAMINIT /* Initial PC */
63 INITSP: .long 0 /* Initial SP */
64 INITPC: .long _START /* Initial PC */
67 vector02: .long _FAULT /* Access Error */
68 vector03: .long _FAULT /* Address Error */
69 vector04: .long _FAULT /* Illegal Instruction */
70 vector05: .long _FAULT /* Reserved */
71 vector06: .long _FAULT /* Reserved */
72 vector07: .long _FAULT /* Reserved */
73 vector08: .long _FAULT /* Privilege Violation */
74 vector09: .long _FAULT /* Trace */
75 vector0A: .long _FAULT /* Unimplemented A-Line */
76 vector0B: .long _FAULT /* Unimplemented F-Line */
77 vector0C: .long _FAULT /* Debug Interrupt */
78 vector0D: .long _FAULT /* Reserved */
79 vector0E: .long _FAULT /* Format Error */
80 vector0F: .long _FAULT /* Unitialized Int. */
84 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
86 vector18: .long _FAULT /* Spurious Interrupt */
87 vector19: .long _FAULT /* Autovector Level 1 */
88 vector1A: .long _FAULT /* Autovector Level 2 */
89 vector1B: .long _FAULT /* Autovector Level 3 */
90 vector1C: .long _FAULT /* Autovector Level 4 */
91 vector1D: .long _FAULT /* Autovector Level 5 */
92 vector1E: .long _FAULT /* Autovector Level 6 */
93 vector1F: .long _FAULT /* Autovector Level 7 */
95 #if !defined(CONFIG_CF_SBF)
98 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
99 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
103 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
104 .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 .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 .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
134 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
137 #if defined(CONFIG_CF_SBF)
138 /* Image header: chksum 4 bytes, len 4 bytes, img dest 4 bytes */
140 .long 0x00000000 /* checksum, not yet implemented */
141 .long 0x00020000 /* image length */
142 .long CONFIG_SYS_TEXT_BASE /* image to be relocated at */
145 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0
146 movec %d0, %RAMBAR1 /* init Rambar */
147 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp
150 /* Must disable global address */
151 move.l #0xFC008000, %a1
152 move.l #(CONFIG_SYS_CS0_BASE), (%a1)
153 move.l #0xFC008008, %a1
154 move.l #(CONFIG_SYS_CS0_CTRL), (%a1)
155 move.l #0xFC008004, %a1
156 move.l #(CONFIG_SYS_CS0_MASK), (%a1)
159 * Dram Initialization
163 move.l #0xFC0A4074, %a1
164 move.b #(CONFIG_SYS_SDRAM_DRV_STRENGTH), (%a1)
167 /* SDRAM Chip 0 and 1 */
168 move.l #0xFC0B8110, %a1
169 move.l #0xFC0B8114, %a2
171 /* calculate the size */
173 move.l #(CONFIG_SYS_SDRAM_SIZE), %d2
174 #ifdef CONFIG_SYS_SDRAM_BASE1
184 /* SDRAM Chip 0 and 1 */
185 move.l #(CONFIG_SYS_SDRAM_BASE), (%a1)
187 #ifdef CONFIG_SYS_SDRAM_BASE1
188 move.l #(CONFIG_SYS_SDRAM_BASE1), (%a2)
193 /* dram cfg1 and cfg2 */
194 move.l #0xFC0B8008, %a1
195 move.l #(CONFIG_SYS_SDRAM_CFG1), (%a1)
197 move.l #0xFC0B800C, %a2
198 move.l #(CONFIG_SYS_SDRAM_CFG2), (%a2)
201 move.l #0xFC0B8000, %a1 /* Mode */
202 move.l #0xFC0B8004, %a2 /* Ctrl */
205 move.l #(CONFIG_SYS_SDRAM_CTRL + 2), (%a2)
209 move.l #(CONFIG_SYS_SDRAM_MODE), (%a1)
211 move.l #(CONFIG_SYS_SDRAM_EMOD), (%a1)
221 move.l #(CONFIG_SYS_SDRAM_CTRL + 2), (%a2)
224 /* Perform two refresh cycles */
225 move.l #(CONFIG_SYS_SDRAM_CTRL + 4), %d0
231 move.l #(CONFIG_SYS_SDRAM_CTRL), %d0
232 and.l #0x7FFFFFFF, %d0
233 or.l #0x10000c00, %d0
238 * DSPI Initialization
239 * a0 - general, sram - 0x80008000 - 32, see M52277EVB.h
246 /* Enable pins for DSPI mode - chip-selects are enabled later */
247 move.l #0xFC0A4036, %a0
252 #ifdef CONFIG_SYS_DSPI_CS0
257 #ifdef CONFIG_SYS_DSPI_CS2
258 move.l #0xFC0A4037, %a0
265 /* Configure DSPI module */
266 move.l #0xFC05C000, %a0
267 move.l #0x80FF0C00, (%a0) /* Master, clear TX/RX FIFO */
269 move.l #0xFC05C00C, %a0
270 move.l #0x3E000011, (%a0)
272 move.l #0xFC05C034, %a2 /* dtfr */
273 move.l #0xFC05C03B, %a3 /* drfr */
275 move.l #(ASM_SBF_IMG_HDR + 4), %a1
279 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_SBFHDR_DATA_OFFSET), %a0
280 move.l #(CONFIG_SYS_SBFHDR_SIZE), %d4
282 move.l #0xFC05C02C, %a1 /* dspi status */
284 /* Issue commands and address */
285 move.l #0x8004000B, %d2 /* Fast Read Cmd */
286 jsr asm_dspi_wr_status
287 jsr asm_dspi_rd_status
289 move.l #0x80040000, %d2 /* Address byte 2 */
290 jsr asm_dspi_wr_status
291 jsr asm_dspi_rd_status
293 move.l #0x80040000, %d2 /* Address byte 1 */
294 jsr asm_dspi_wr_status
295 jsr asm_dspi_rd_status
297 move.l #0x80040000, %d2 /* Address byte 0 */
298 jsr asm_dspi_wr_status
299 jsr asm_dspi_rd_status
301 move.l #0x80040000, %d2 /* Dummy Wr and Rd */
302 jsr asm_dspi_wr_status
303 jsr asm_dspi_rd_status
305 /* Transfer serial boot header to sram */
307 move.l #0x80040000, %d2
308 jsr asm_dspi_wr_status
309 jsr asm_dspi_rd_status
311 move.b %d1, (%a0) /* read, copy to dst */
313 add.l #1, %a0 /* inc dst by 1 */
314 sub.l #1, %d4 /* dec cnt by 1 */
315 bne asm_dspi_rd_loop1
317 /* Transfer u-boot from serial flash to memory */
319 move.l #0x80040000, %d2
320 jsr asm_dspi_wr_status
321 jsr asm_dspi_rd_status
323 move.b %d1, (%a4) /* read, copy to dst */
325 add.l #1, %a4 /* inc dst by 1 */
326 sub.l #1, %d5 /* dec cnt by 1 */
327 bne asm_dspi_rd_loop2
329 move.l #0x00040000, %d2 /* Terminate */
330 jsr asm_dspi_wr_status
331 jsr asm_dspi_rd_status
333 /* jump to memory and execute */
334 move.l #(CONFIG_SYS_TEXT_BASE + 0x400), %a0
339 move.l (%a1), %d0 /* status */
340 and.l #0x0000F000, %d0
341 cmp.l #0x00003000, %d0
342 bgt asm_dspi_wr_status
348 move.l (%a1), %d0 /* status */
349 and.l #0x000000F0, %d0
352 beq asm_dspi_rd_status
356 #endif /* CONFIG_CF_SBF */
364 move.w #0x2700,%sr /* Mask off Interrupt */
366 /* Set vector base register at the beginning of the Flash */
367 #if defined(CONFIG_CF_SBF)
368 move.l #CONFIG_SYS_TEXT_BASE, %d0
371 move.l #CONFIG_SYS_FLASH_BASE, %d0
374 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0
378 /* invalidate and disable cache */
379 move.l #CF_CACR_CINV, %d0 /* Invalidate cache cmd */
380 movec %d0, %CACR /* Invalidate cache */
385 /* initialize general use internal ram */
387 move.l #(ICACHE_STATUS), %a1 /* icache */
388 move.l #(DCACHE_STATUS), %a2 /* icache */
392 /* set stackpointer to end of internal ram to get some stackspace for
394 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp
397 move.l #__got_start, %a5 /* put relocation table address to a5 */
399 bsr cpu_init_f /* run low-level CPU init code (from flash) */
400 bsr board_init_f /* run low-level board init code (from flash) */
402 /* board_init_f() does not return */
404 /*------------------------------------------------------------------------------*/
407 * void relocate_code (addr_sp, gd, addr_moni)
409 * This "function" does not return, instead it continues in RAM
410 * after relocating the monitor code.
414 * r5 = length in bytes
420 move.l 8(%a6), %sp /* set new stack pointer */
422 move.l 12(%a6), %d0 /* Save copy of Global Data pointer */
423 move.l 16(%a6), %a0 /* Save copy of Destination Address */
425 move.l #CONFIG_SYS_MONITOR_BASE, %a1
426 move.l #__init_end, %a2
429 /* copy the code to RAM */
431 move.l (%a1)+, (%a3)+
436 * We are done. Do not return, instead branch to second part of board
437 * initialization, now running from RAM.
440 add.l #(in_ram - CONFIG_SYS_MONITOR_BASE), %a1
447 * Now clear BSS segment
450 add.l #(_sbss - CONFIG_SYS_MONITOR_BASE),%a1
452 add.l #(_ebss - CONFIG_SYS_MONITOR_BASE),%d1
459 * fix got table in RAM
462 add.l #(__got_start - CONFIG_SYS_MONITOR_BASE),%a1
463 move.l %a1,%a5 /* * fix got pointer register a5 */
466 add.l #(__got_end - CONFIG_SYS_MONITOR_BASE),%a2
476 /* calculate relative jump to board_init_r in ram */
478 add.l #(board_init_r - CONFIG_SYS_MONITOR_BASE), %a1
480 /* set parameters for board_init_r */
481 move.l %a0,-(%sp) /* dest_addr */
482 move.l %d0,-(%sp) /* gd */
485 /*------------------------------------------------------------------------------*/
507 /*------------------------------------------------------------------------------*/
509 .globl version_string
511 .ascii U_BOOT_VERSION
512 .ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")"
513 .ascii CONFIG_IDENT_STRING, "\0"