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.
58 .long 0x00000000, _START
59 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
60 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
61 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
62 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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
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, _FAULT, _FAULT
74 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
75 .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
83 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
84 .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
92 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
93 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
105 /* if we come from a pre-loader we have no exception table and
106 * therefore no VBR to set
108 #if !defined(CONFIG_MONITOR_IS_IN_RAM)
109 move.l #CFG_FLASH_BASE, %d0
114 move.l #(CFG_MBAR + 1), %d0 /* set MBAR address + valid flag */
117 move.l #(CFG_INIT_RAM_ADDR + 1), %d0
122 /* Initialize IPSBAR */
123 move.l #(CFG_MBAR + 1), %d0 /* set IPSBAR address + valid flag */
124 move.l %d0, 0x40000000
126 /* Initialize FLASHBAR: locate internal Flash and validate it */
127 move.l #(CFG_INT_FLASH_BASE + 0x21), %d0
130 /* Initialize RAMBAR1: locate SRAM and validate it */
131 move.l #(CFG_INIT_RAM_ADDR + 0x21), %d0
135 /* invalidate and disable cache */
136 move.l #0x01000000, %d0 /* Invalidate cache cmd */
137 movec %d0, %CACR /* Invalidate cache */
142 /* set stackpointer to end of internal ram to get some stackspace for the first c-code */
143 move.l #(CFG_INIT_RAM_ADDR + CFG_INIT_SP_OFFSET), %sp
146 move.l #__got_start, %a5 /* put relocation table address to a5 */
148 bsr cpu_init_f /* run low-level CPU init code (from flash) */
149 bsr board_init_f /* run low-level board init code (from flash) */
151 /* board_init_f() does not return
153 /*------------------------------------------------------------------------------*/
156 * void relocate_code (addr_sp, gd, addr_moni)
158 * This "function" does not return, instead it continues in RAM
159 * after relocating the monitor code.
163 * r5 = length in bytes
169 move.l 8(%a6), %sp /* set new stack pointer */
171 move.l 12(%a6), %d0 /* Save copy of Global Data pointer */
172 move.l 16(%a6), %a0 /* Save copy of Destination Address */
174 move.l #CFG_MONITOR_BASE, %a1
175 move.l #__init_end, %a2
178 /* copy the code to RAM */
180 move.l (%a1)+, (%a3)+
185 * We are done. Do not return, instead branch to second part of board
186 * initialization, now running from RAM.
189 add.l #(in_ram - CFG_MONITOR_BASE), %a1
196 * Now clear BSS segment
199 add.l #(_sbss - CFG_MONITOR_BASE),%a1
201 add.l #(_ebss - CFG_MONITOR_BASE),%d1
208 * fix got table in RAM
211 add.l #(__got_start - CFG_MONITOR_BASE),%a1
212 move.l %a1,%a5 /* * fix got pointer register a5 */
215 add.l #(__got_end - CFG_MONITOR_BASE),%a2
225 /* calculate relative jump to board_init_r in ram */
227 add.l #(board_init_r - CFG_MONITOR_BASE), %a1
229 /* set parameters for board_init_r */
230 move.l %a0,-(%sp) /* dest_addr */
231 move.l %d0,-(%sp) /* gd */
234 /*------------------------------------------------------------------------------*/
256 /*------------------------------------------------------------------------------*/
257 /* cache functions */
261 move.l #0x01000000, %d0 /* Invalidate cache cmd */
262 movec %d0, %CACR /* Invalidate cache */
263 move.l #0x0000c000, %d0 /* Setup cache mask */
264 movec %d0, %ACR0 /* Enable cache */
265 move.l #0xff00c000, %d0 /* Setup cache mask */
266 movec %d0, %ACR1 /* Enable cache */
267 move.l #0x80000100, %d0 /* Setup cache mask */
268 movec %d0, %CACR /* Enable cache */
270 move.l %d0, icache_state
277 move.l #0x01000000, %d0 /* Invalidate cache cmd */
278 movec %d0, %CACR /* Invalidate cache */
279 move.l #0x0000c000, %d0 /* Setup cache mask */
280 movec %d0, %ACR0 /* Enable cache */
281 move.l #0xff00c000, %d0 /* Setup cache mask */
282 movec %d0, %ACR1 /* Enable cache */
283 move.l #0x80400100, %d0 /* Setup cache mask, data cache disabel*/
284 movec %d0, %CACR /* Enable cache */
286 move.l %d0, icache_state
290 .globl icache_disable
292 move.l #0x00000100, %d0 /* Setup cache mask */
293 movec %d0, %CACR /* Enable cache */
294 clr.l %d0 /* Setup cache mask */
295 movec %d0, %ACR0 /* Enable cache */
296 movec %d0, %ACR1 /* Enable cache */
298 move.l %d0, icache_state
303 move.l icache_state, %d0
310 /*------------------------------------------------------------------------------*/
312 .globl version_string
314 .ascii U_BOOT_VERSION
315 .ascii " (", __DATE__, " - ", __TIME__, ")"
316 .ascii CONFIG_IDENT_STRING, "\0"