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,
25 #include <timestamp.h>
28 #ifndef CONFIG_IDENT_STRING
29 #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 we come from a pre-loader we don't need an initial exception
50 #if !defined(CONFIG_MONITOR_IS_IN_RAM)
54 * Vector table. This is used for initial platform startup.
55 * These vectors are to catch any un-intended traps.
59 .long 0x00000000 /* Flash offset is 0 until we setup CS0 */
60 #if defined(CONFIG_M5282) && (TEXT_BASE == CONFIG_SYS_INT_FLASH_BASE)
61 .long _start - TEXT_BASE
66 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
67 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
68 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
69 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
70 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
71 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
72 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
73 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
75 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
76 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
77 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
78 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
79 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
80 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
81 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
82 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
84 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
85 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
86 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
87 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
88 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
89 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
90 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
91 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
93 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
94 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
95 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
96 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
97 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
98 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
99 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
100 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
107 #if defined(CONFIG_SYS_INT_FLASH_BASE) && \
108 (defined(CONFIG_M5282) || defined(CONFIG_M5281))
109 #if (TEXT_BASE == CONFIG_SYS_INT_FLASH_BASE)
110 .long 0x55AA55AA,0xAA55AA55 /* CFM Backdoorkey */
111 .long 0xFFFFFFFF /* all sectors protected */
112 .long 0x00000000 /* supervisor/User restriction */
113 .long 0x00000000 /* programm/data space restriction */
114 .long 0x00000000 /* Flash security */
123 #if defined(CONFIG_M5208)
124 /* Initialize RAMBAR: locate SRAM and validate it */
125 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0
129 #if defined(CONFIG_M5272) || defined(CONFIG_M5249) || defined(CONFIG_M5253)
130 move.l #(CONFIG_SYS_MBAR + 1), %d0 /* set MBAR address + valid flag */
133 /*** The 5249 has MBAR2 as well ***/
134 #ifdef CONFIG_SYS_MBAR2
135 move.l #(CONFIG_SYS_MBAR2 + 1), %d0 /* Get MBAR2 address */
136 movec %d0, #0xc0e /* Set MBAR2 */
139 move.l #(CONFIG_SYS_INIT_RAM_ADDR + 1), %d0
141 #endif /* CONFIG_M5272 || CONFIG_M5249 || CONFIG_M5253 */
143 #if defined(CONFIG_M5282) || defined(CONFIG_M5271)
144 /* Initialize IPSBAR */
145 move.l #(CONFIG_SYS_MBAR + 1), %d0 /* set IPSBAR address + valid flag */
146 move.l %d0, 0x40000000
148 /* Initialize RAMBAR1: locate SRAM and validate it */
149 move.l #(CONFIG_SYS_INIT_RAM_ADDR + 0x21), %d0
152 #if defined(CONFIG_M5282)
153 #if (TEXT_BASE == CONFIG_SYS_INT_FLASH_BASE)
154 /* Setup code in SRAM to initialize FLASHBAR, if start from internal Flash */
156 move.l #(_flashbar_setup-CONFIG_SYS_INT_FLASH_BASE), %a0
157 move.l #(_flashbar_setup_end-CONFIG_SYS_INT_FLASH_BASE), %a1
158 move.l #(CONFIG_SYS_INIT_RAM_ADDR), %a2
160 move.l (%a0)+, (%a2)+
163 jmp CONFIG_SYS_INIT_RAM_ADDR
166 /* Initialize FLASHBAR: locate internal Flash and validate it */
167 move.l #(CONFIG_SYS_INT_FLASH_BASE + CONFIG_SYS_INT_FLASH_ENABLE), %d0
169 jmp _after_flashbar_copy.L /* Force jump to absolute address */
172 _after_flashbar_copy:
174 /* Setup code to initialize FLASHBAR, if start from external Memory */
175 move.l #(CONFIG_SYS_INT_FLASH_BASE + CONFIG_SYS_INT_FLASH_ENABLE), %d0
177 #endif /* (TEXT_BASE == CONFIG_SYS_INT_FLASH_BASE) */
181 /* if we come from a pre-loader we have no exception table and
182 * therefore no VBR to set
184 #if !defined(CONFIG_MONITOR_IS_IN_RAM)
185 #if defined(CONFIG_M5282) && (TEXT_BASE == CONFIG_SYS_INT_FLASH_BASE)
186 move.l #CONFIG_SYS_INT_FLASH_BASE, %d0
188 move.l #CONFIG_SYS_FLASH_BASE, %d0
194 /* Initialize IPSBAR */
195 move.l #(CONFIG_SYS_MBAR + 1), %d0 /* set IPSBAR address + valid flag */
196 move.l %d0, 0x40000000
197 /* movec %d0, %MBAR */
199 /* Initialize RAMBAR: locate SRAM and validate it */
200 move.l #(CONFIG_SYS_INIT_RAM_ADDR + 0x21), %d0
204 /* set stackpointer to end of internal ram to get some stackspace for the first c-code */
205 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp
208 move.l #__got_start, %a5 /* put relocation table address to a5 */
210 bsr cpu_init_f /* run low-level CPU init code (from flash) */
211 bsr board_init_f /* run low-level board init code (from flash) */
213 /* board_init_f() does not return */
215 /*------------------------------------------------------------------------------*/
218 * void relocate_code (addr_sp, gd, addr_moni)
220 * This "function" does not return, instead it continues in RAM
221 * after relocating the monitor code.
225 * r5 = length in bytes
231 move.l 8(%a6), %sp /* set new stack pointer */
233 move.l 12(%a6), %d0 /* Save copy of Global Data pointer */
234 move.l 16(%a6), %a0 /* Save copy of Destination Address */
236 move.l #CONFIG_SYS_MONITOR_BASE, %a1
237 move.l #__init_end, %a2
239 /* copy the code to RAM */
241 move.l (%a1)+, (%a3)+
246 * We are done. Do not return, instead branch to second part of board
247 * initialization, now running from RAM.
250 add.l #(in_ram - CONFIG_SYS_MONITOR_BASE), %a1
257 * Now clear BSS segment
260 add.l #(_sbss - CONFIG_SYS_MONITOR_BASE),%a1
262 add.l #(_ebss - CONFIG_SYS_MONITOR_BASE),%d1
269 * fix got table in RAM
272 add.l #(__got_start - CONFIG_SYS_MONITOR_BASE),%a1
273 move.l %a1,%a5 /* * fix got pointer register a5 */
276 add.l #(__got_end - CONFIG_SYS_MONITOR_BASE),%a2
286 #if defined(CONFIG_M5281) || defined(CONFIG_M5282)
287 /* patch the 3 accesspoints to 3 ichache_state */
288 /* quick and dirty */
291 add.l #(icache_state - CONFIG_SYS_MONITOR_BASE),%d1
293 add.l #(icache_state_access_1+2 - CONFIG_SYS_MONITOR_BASE),%a1
296 add.l #(icache_state_access_2+2 - CONFIG_SYS_MONITOR_BASE),%a1
299 add.l #(icache_state_access_3+2 - CONFIG_SYS_MONITOR_BASE),%a1
303 /* calculate relative jump to board_init_r in ram */
305 add.l #(board_init_r - CONFIG_SYS_MONITOR_BASE), %a1
307 /* set parameters for board_init_r */
308 move.l %a0,-(%sp) /* dest_addr */
309 move.l %d0,-(%sp) /* gd */
310 #if defined(DEBUG) && (TEXT_BASE != CONFIG_SYS_INT_FLASH_BASE) && \
311 defined(CONFIG_SYS_HALT_BEFOR_RAM_JUMP)
316 /*------------------------------------------------------------------------------*/
338 /*------------------------------------------------------------------------------*/
339 /* cache functions */
343 move.l #0x01000000, %d0 /* Invalidate cache cmd */
344 movec %d0, %CACR /* Invalidate cache */
345 move.l #(CONFIG_SYS_SDRAM_BASE + 0xC000), %d0 /* Setup cache mask */
346 movec %d0, %ACR0 /* Enable cache */
348 move.l #0x80000200, %d0 /* Setup cache mask */
349 movec %d0, %CACR /* Enable cache */
352 move.l #(CONFIG_SYS_INIT_RAM_ADDR+CONFIG_SYS_INIT_RAM_END-8), %a1
361 move.l #0x01000000, %d0 /* Invalidate cache cmd */
362 movec %d0, %CACR /* Invalidate cache */
363 move.l #(CONFIG_SYS_SDRAM_BASE + 0xc000), %d0 /* Setup cache mask */
364 movec %d0, %ACR0 /* Enable cache */
366 move.l #0x80000200, %d0 /* Setup cache mask */
367 movec %d0, %CACR /* Enable cache */
370 move.l #(CONFIG_SYS_INIT_RAM_ADDR+CONFIG_SYS_INIT_RAM_END-8), %a1
379 move.l #0x01000000, %d0 /* Invalidate cache cmd */
380 movec %d0, %CACR /* Invalidate cache */
381 move.l #0x0000c000, %d0 /* Setup cache mask */
382 movec %d0, %ACR0 /* Enable cache */
383 move.l #0xff00c000, %d0 /* Setup cache mask */
384 movec %d0, %ACR1 /* Enable cache */
385 move.l #0x80000100, %d0 /* Setup cache mask */
386 movec %d0, %CACR /* Enable cache */
388 move.l %d0, icache_state
392 #if defined(CONFIG_M5275)
394 * Instruction cache only
398 move.l #0x01400000, %d0 /* Invalidate cache cmd */
399 movec %d0, %CACR /* Invalidate cache */
400 move.l #0x0000c000, %d0 /* Setup SDRAM caching */
401 movec %d0, %ACR0 /* Enable cache */
402 move.l #0x00000000, %d0 /* No other caching */
403 movec %d0, %ACR1 /* Enable cache */
404 move.l #0x80400100, %d0 /* Setup cache mask */
405 movec %d0, %CACR /* Enable cache */
407 move.l %d0, icache_state
414 move.l #0x01000000, %d0 /* Invalidate cache cmd */
415 movec %d0, %CACR /* Invalidate cache */
416 move.l #0x0000c000, %d0 /* Setup cache mask */
417 movec %d0, %ACR0 /* Enable cache */
418 move.l #0xff00c000, %d0 /* Setup cache mask */
419 movec %d0, %ACR1 /* Enable cache */
420 move.l #0x80400100, %d0 /* Setup cache mask, data cache disabel*/
421 movec %d0, %CACR /* Enable cache */
423 icache_state_access_1:
424 move.l %d0, icache_state
428 #if defined(CONFIG_M5249) || defined(CONFIG_M5253)
432 * Note: The 5249 Documentation doesn't give a bit position for CINV!
433 * From the 5272 and the 5307 documentation, I have deduced that it is
434 * probably CACR[24]. Should someone say something to Motorola?
437 move.l #0x01000000, %d0 /* Invalidate whole cache */
439 move.l #0xff00c000, %d0 /* Set FLASH cachable: always match (SM=0b10) */
441 move.l #0x0000c000, %d0 /* Set SDRAM cachable: always match (SM=0b10) */
443 move.l #0x90000200, %d0 /* Set cache enable cmd */
446 move.l %d0, icache_state
450 .globl icache_disable
452 move.l #0x00000100, %d0 /* Setup cache mask */
453 movec %d0, %CACR /* Enable cache */
454 clr.l %d0 /* Setup cache mask */
455 movec %d0, %ACR0 /* Enable cache */
456 movec %d0, %ACR1 /* Enable cache */
458 icache_state_access_2:
459 move.l %d0, icache_state
464 icache_state_access_3:
465 move.l #(icache_state), %a0
471 .long 0 /* cache is diabled on inirialization */
478 .globl dcache_disable
488 /*------------------------------------------------------------------------------*/
490 .globl version_string
492 .ascii U_BOOT_VERSION
493 .ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")"
494 .ascii CONFIG_IDENT_STRING, "\0"