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,
27 #ifndef CONFIG_IDENT_STRING
28 #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 we come from a pre-loader we don't need an initial exception
49 #if !defined(CONFIG_MONITOR_IS_IN_RAM)
53 * Vector table. This is used for initial platform startup.
54 * These vectors are to catch any un-intended traps.
61 .long _start - TEXT_BASE
63 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
64 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
65 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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
72 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
73 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
74 .long _FAULT, _FAULT, _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
81 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
82 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
83 .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
90 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
91 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
92 .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
104 #if defined(CFG_INT_FLASH_BASE) && \
105 (defined(CONFIG_M5282) || defined(CONFIG_M5281))
106 #if (TEXT_BASE == CFG_INT_FLASH_BASE)
107 .long 0x55AA55AA,0xAA55AA55 /* CFM Backdoorkey */
108 .long 0xFFFFFFFF /* all sectors protected */
109 .long 0x00000000 /* supervisor/User restriction */
110 .long 0x00000000 /* programm/data space restriction */
111 .long 0x00000000 /* Flash security */
120 #if defined(CONFIG_M5272) || defined(CONFIG_M5249)
121 move.l #(CFG_MBAR + 1), %d0 /* set MBAR address + valid flag */
124 /*** The 5249 has MBAR2 as well ***/
126 move.l #(CFG_MBAR2 + 1), %d0 /* Get MBAR2 address */
127 movec %d0, #0xc0e /* Set MBAR2 */
130 move.l #(CFG_INIT_RAM_ADDR + 1), %d0
132 #endif /* #if defined(CONFIG_M5272) || defined(CONFIG_M5249) */
135 /* Initialize IPSBAR */
136 move.l #(CFG_MBAR + 1), %d0 /* set IPSBAR address + valid flag */
137 move.l %d0, 0x40000000
139 /* Initialize RAMBAR1: locate SRAM and validate it */
140 move.l #(CFG_INIT_RAM_ADDR + 0x21), %d0
143 #if (TEXT_BASE == CFG_INT_FLASH_BASE)
144 /* Setup code in SRAM to initialize FLASHBAR, if start from internal Flash */
146 move.l #(_flashbar_setup-CFG_INT_FLASH_BASE), %a0
147 move.l #(_flashbar_setup_end-CFG_INT_FLASH_BASE), %a1
148 move.l #(CFG_INIT_RAM_ADDR), %a2
150 move.l (%a0)+, (%a2)+
153 jmp CFG_INIT_RAM_ADDR
156 /* Initialize FLASHBAR: locate internal Flash and validate it */
157 move.l #(CFG_INT_FLASH_BASE + 0x21), %d0
159 jmp _after_flashbar_copy.L /* Force jump to absolute address */
162 _after_flashbar_copy:
164 /* Setup code to initialize FLASHBAR, if start from external Memory */
165 move.l #(CFG_INT_FLASH_BASE + 0x21), %d0
167 #endif /* (TEXT_BASE == CFG_INT_FLASH_BASE) */
170 /* if we come from a pre-loader we have no exception table and
171 * therefore no VBR to set
173 #if !defined(CONFIG_MONITOR_IS_IN_RAM)
174 move.l #CFG_FLASH_BASE, %d0
178 /* invalidate and disable cache */
179 move.l #0x01000000, %d0 /* Invalidate cache cmd */
180 movec %d0, %CACR /* Invalidate cache */
185 /* set stackpointer to end of internal ram to get some stackspace for the first c-code */
186 move.l #(CFG_INIT_RAM_ADDR + CFG_INIT_SP_OFFSET), %sp
189 move.l #__got_start, %a5 /* put relocation table address to a5 */
191 bsr cpu_init_f /* run low-level CPU init code (from flash) */
192 bsr board_init_f /* run low-level board init code (from flash) */
194 /* board_init_f() does not return
196 /*------------------------------------------------------------------------------*/
198 * void relocate_code (addr_sp, gd, addr_moni)
200 * This "function" does not return, instead it continues in RAM
201 * after relocating the monitor code.
205 * r5 = length in bytes
211 move.l 8(%a6), %sp /* set new stack pointer */
213 move.l 12(%a6), %d0 /* Save copy of Global Data pointer */
214 move.l 16(%a6), %a0 /* Save copy of Destination Address */
216 move.l #CFG_MONITOR_BASE, %a1
217 move.l #__init_end, %a2
219 /* copy the code to RAM */
221 move.l (%a1)+, (%a3)+
226 * We are done. Do not return, instead branch to second part of board
227 * initialization, now running from RAM.
230 add.l #(in_ram - CFG_MONITOR_BASE), %a1
237 * Now clear BSS segment
240 add.l #(_sbss - CFG_MONITOR_BASE),%a1
242 add.l #(_ebss - CFG_MONITOR_BASE),%d1
249 * fix got table in RAM
252 add.l #(__got_start - CFG_MONITOR_BASE),%a1
253 move.l %a1,%a5 /* * fix got pointer register a5 */
256 add.l #(__got_end - CFG_MONITOR_BASE),%a2
266 #if defined(CONFIG_M5281) || defined(CONFIG_M5282)
267 /* patch the 3 accesspoints to 3 ichache_state */
268 /* quick and dirty */
271 add.l #(icache_state - CFG_MONITOR_BASE),%d1
273 add.l #(icache_state_access_1+2 - CFG_MONITOR_BASE),%a1
276 add.l #(icache_state_access_2+2 - CFG_MONITOR_BASE),%a1
279 add.l #(icache_state_access_3+2 - CFG_MONITOR_BASE),%a1
283 /* calculate relative jump to board_init_r in ram */
285 add.l #(board_init_r - CFG_MONITOR_BASE), %a1
287 /* set parameters for board_init_r */
288 move.l %a0,-(%sp) /* dest_addr */
289 move.l %d0,-(%sp) /* gd */
290 #if defined(DEBUG) && (TEXT_BASE != CFG_INT_FLASH_BASE) && \
291 defined(CFG_HALT_BEFOR_RAM_JUMP)
296 /*------------------------------------------------------------------------------*/
318 /*------------------------------------------------------------------------------*/
319 /* cache functions */
323 move.l #0x01000000, %d0 /* Invalidate cache cmd */
324 movec %d0, %CACR /* Invalidate cache */
325 move.l #0x0000c000, %d0 /* Setup cache mask */
326 movec %d0, %ACR0 /* Enable cache */
327 move.l #0xff00c000, %d0 /* Setup cache mask */
328 movec %d0, %ACR1 /* Enable cache */
329 move.l #0x80000100, %d0 /* Setup cache mask */
330 movec %d0, %CACR /* Enable cache */
332 move.l %d0, icache_state
339 move.l #0x01000000, %d0 /* Invalidate cache cmd */
340 movec %d0, %CACR /* Invalidate cache */
341 move.l #0x0000c000, %d0 /* Setup cache mask */
342 movec %d0, %ACR0 /* Enable cache */
343 move.l #0xff00c000, %d0 /* Setup cache mask */
344 movec %d0, %ACR1 /* Enable cache */
345 move.l #0x80400100, %d0 /* Setup cache mask, data cache disabel*/
346 movec %d0, %CACR /* Enable cache */
348 icache_state_access_1:
349 move.l %d0, icache_state
357 * Note: The 5249 Documentation doesn't give a bit position for CINV!
358 * From the 5272 and the 5307 documentation, I have deduced that it is
359 * probably CACR[24]. Should someone say something to Motorola?
362 move.l #0x01000000, %d0 /* Invalidate whole cache */
364 move.l #0xff00c000, %d0 /* Set FLASH cachable: always match (SM=0b10) */
366 move.l #0x0000c000, %d0 /* Set SDRAM cachable: always match (SM=0b10) */
368 move.l #0x90000200, %d0 /* Set cache enable cmd */
371 move.l %d0, icache_state
375 .globl icache_disable
377 move.l #0x00000100, %d0 /* Setup cache mask */
378 movec %d0, %CACR /* Enable cache */
379 clr.l %d0 /* Setup cache mask */
380 movec %d0, %ACR0 /* Enable cache */
381 movec %d0, %ACR1 /* Enable cache */
383 icache_state_access_2:
384 move.l %d0, icache_state
389 icache_state_access_3:
390 move.l icache_state, %d0
395 .long 0 /* cache is diabled on inirialization */
397 /*------------------------------------------------------------------------------*/
399 .globl version_string
401 .ascii U_BOOT_VERSION
402 .ascii " (", __DATE__, " - ", __TIME__, ")"
403 .ascii CONFIG_IDENT_STRING, "\0"