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 ""
31 /* last three long word reserved for cache status */
32 #define ICACHE_STATUS (CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END- 4)
33 #define DCACHE_STATUS (CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END- 8)
34 #define CACR_STATUS (CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-12)
40 move.w #0x2700,%sr; /* disable intrs */ \
41 subl #60,%sp; /* space for 15 regs */ \
42 moveml %d0-%d7/%a0-%a6,%sp@;
45 moveml %sp@,%d0-%d7/%a0-%a6; \
46 addl #60,%sp; /* space for 15 regs */ \
51 * Vector table. This is used for initial platform startup.
52 * These vectors are to catch any un-intended traps.
56 INITSP: .long 0x00000000 /* Initial SP */
57 INITPC: .long _START /* Initial PC */
58 vector02: .long _FAULT /* Access Error */
59 vector03: .long _FAULT /* Address Error */
60 vector04: .long _FAULT /* Illegal Instruction */
61 vector05: .long _FAULT /* Reserved */
62 vector06: .long _FAULT /* Reserved */
63 vector07: .long _FAULT /* Reserved */
64 vector08: .long _FAULT /* Privilege Violation */
65 vector09: .long _FAULT /* Trace */
66 vector0A: .long _FAULT /* Unimplemented A-Line */
67 vector0B: .long _FAULT /* Unimplemented F-Line */
68 vector0C: .long _FAULT /* Debug Interrupt */
69 vector0D: .long _FAULT /* Reserved */
70 vector0E: .long _FAULT /* Format Error */
71 vector0F: .long _FAULT /* Unitialized Int. */
75 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
77 vector18: .long _FAULT /* Spurious Interrupt */
78 vector19: .long _FAULT /* Autovector Level 1 */
79 vector1A: .long _FAULT /* Autovector Level 2 */
80 vector1B: .long _FAULT /* Autovector Level 3 */
81 vector1C: .long _FAULT /* Autovector Level 4 */
82 vector1D: .long _FAULT /* Autovector Level 5 */
83 vector1E: .long _FAULT /* Autovector Level 6 */
84 vector1F: .long _FAULT /* Autovector Level 7 */
88 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
89 .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
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
101 .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
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
132 move.w #0x2700,%sr /* Mask off Interrupt */
134 /* Set vector base register at the beginning of the Flash */
135 move.l #CFG_FLASH_BASE, %d0
138 move.l #(CFG_INIT_RAM_ADDR + CFG_INIT_RAM_CTRL), %d0
141 move.l #(CFG_INIT_RAM1_ADDR + CFG_INIT_RAM1_CTRL), %d0
144 move.l #CFG_MBAR, %d0 /* set MBAR address */
147 /* invalidate and disable cache */
148 move.l #0x01040100, %d0 /* Invalidate cache cmd */
149 movec %d0, %CACR /* Invalidate cache */
156 /* initialize general use internal ram */
158 move.l #(ICACHE_STATUS), %a1 /* icache */
159 move.l #(DCACHE_STATUS), %a2 /* icache */
160 move.l #(CACR_STATUS), %a3 /* CACR */
165 /* set stackpointer to end of internal ram to get some stackspace for the
167 move.l #(CFG_INIT_RAM_ADDR + CFG_INIT_SP_OFFSET), %sp
170 move.l #__got_start, %a5 /* put relocation table address to a5 */
172 bsr cpu_init_f /* run low-level CPU init code (from flash) */
173 bsr board_init_f /* run low-level board init code (from flash) */
175 /* board_init_f() does not return */
177 /*------------------------------------------------------------------------------*/
180 * void relocate_code (addr_sp, gd, addr_moni)
182 * This "function" does not return, instead it continues in RAM
183 * after relocating the monitor code.
187 * r5 = length in bytes
193 move.l 8(%a6), %sp /* set new stack pointer */
195 move.l 12(%a6), %d0 /* Save copy of Global Data pointer */
196 move.l 16(%a6), %a0 /* Save copy of Destination Address */
198 move.l #CFG_MONITOR_BASE, %a1
199 move.l #__init_end, %a2
202 /* copy the code to RAM */
204 move.l (%a1)+, (%a3)+
209 * We are done. Do not return, instead branch to second part of board
210 * initialization, now running from RAM.
213 add.l #(in_ram - CFG_MONITOR_BASE), %a1
220 * Now clear BSS segment
223 add.l #(_sbss - CFG_MONITOR_BASE),%a1
225 add.l #(_ebss - CFG_MONITOR_BASE),%d1
232 * fix got table in RAM
235 add.l #(__got_start - CFG_MONITOR_BASE),%a1
236 move.l %a1,%a5 /* * fix got pointer register a5 */
239 add.l #(__got_end - CFG_MONITOR_BASE),%a2
249 /* calculate relative jump to board_init_r in ram */
251 add.l #(board_init_r - CFG_MONITOR_BASE), %a1
253 /* set parameters for board_init_r */
254 move.l %a0,-(%sp) /* dest_addr */
255 move.l %d0,-(%sp) /* gd */
258 /*------------------------------------------------------------------------------*/
280 /*------------------------------------------------------------------------------*/
281 /* cache functions */
284 move.l #(CFG_SDRAM_BASE + 0x1c000), %d0
285 movec %d0, %ACR2 /* Enable cache */
287 move.l #0x020C8100, %d0 /* Setup cache mask */
288 movec %d0, %CACR /* Enable cache */
291 move.l #(ICACHE_STATUS), %a1
296 .globl icache_disable
298 move.l #0x000C8100, %d0 /* Setup cache mask */
299 movec %d0, %CACR /* Disable cache */
300 clr.l %d0 /* Setup cache mask */
304 move.l #(ICACHE_STATUS), %a1
309 .globl icache_invalid
311 move.l #0x000C8100, %d0 /* Setup cache mask */
312 movec %d0, %CACR /* Enable cache */
317 move.l #(ICACHE_STATUS), %a1
325 move.l #(CFG_SDRAM_BASE + 0xc000), %d0
326 movec %d0, %ACR0 /* Enable cache */
328 move.l #0xA30C8100, %d0 /* Invalidate cache cmd */
329 movec %d0, %CACR /* Invalidate cache */
331 move.l #(DCACHE_STATUS), %a1
336 .globl dcache_disable
338 move.l #0xA30C8100, %d0 /* Setup cache mask */
339 movec %d0, %CACR /* Disable cache */
340 clr.l %d0 /* Setup cache mask */
344 move.l #(DCACHE_STATUS), %a1
351 move.l #(DCACHE_STATUS), %a1
355 /*------------------------------------------------------------------------------*/
357 .globl version_string
359 .ascii U_BOOT_VERSION
360 .ascii " (", __DATE__, " - ", __TIME__, ")"
361 .ascii CONFIG_IDENT_STRING, "\0"