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 /* initialize general use internal ram */
143 move.l #(ICACHE_STATUS), %a1 /* icache */
144 move.l #(DCACHE_STATUS), %a2 /* icache */
145 move.l #(CACR_STATUS), %a3 /* CACR */
150 /* invalidate and disable cache */
151 move.l #0x01000000, %d0 /* Invalidate cache cmd */
152 movec %d0, %CACR /* Invalidate cache */
157 /* set stackpointer to end of internal ram to get some stackspace for
159 move.l #(CFG_INIT_RAM_ADDR + CFG_INIT_SP_OFFSET), %sp
162 move.l #__got_start, %a5 /* put relocation table address to a5 */
164 bsr cpu_init_f /* run low-level CPU init code (from flash) */
165 bsr board_init_f /* run low-level board init code (from flash) */
167 /* board_init_f() does not return */
169 /*------------------------------------------------------------------------------*/
172 * void relocate_code (addr_sp, gd, addr_moni)
174 * This "function" does not return, instead it continues in RAM
175 * after relocating the monitor code.
179 * r5 = length in bytes
185 move.l 8(%a6), %sp /* set new stack pointer */
187 move.l 12(%a6), %d0 /* Save copy of Global Data pointer */
188 move.l 16(%a6), %a0 /* Save copy of Destination Address */
190 move.l #CFG_MONITOR_BASE, %a1
191 move.l #__init_end, %a2
194 /* copy the code to RAM */
196 move.l (%a1)+, (%a3)+
201 * We are done. Do not return, instead branch to second part of board
202 * initialization, now running from RAM.
205 add.l #(in_ram - CFG_MONITOR_BASE), %a1
212 * Now clear BSS segment
215 add.l #(_sbss - CFG_MONITOR_BASE),%a1
217 add.l #(_ebss - CFG_MONITOR_BASE),%d1
224 * fix got table in RAM
227 add.l #(__got_start - CFG_MONITOR_BASE),%a1
228 move.l %a1,%a5 /* * fix got pointer register a5 */
231 add.l #(__got_end - CFG_MONITOR_BASE),%a2
241 /* calculate relative jump to board_init_r in ram */
243 add.l #(board_init_r - CFG_MONITOR_BASE), %a1
245 /* set parameters for board_init_r */
246 move.l %a0,-(%sp) /* dest_addr */
247 move.l %d0,-(%sp) /* gd */
250 /*------------------------------------------------------------------------------*/
272 /*------------------------------------------------------------------------------*/
273 /* cache functions */
276 move.l #0x01200000, %d0 /* Invalid cache */
279 move.l #(CFG_SDRAM_BASE + 0x1c000), %d0
282 move.l #0x81600610, %d0 /* Enable cache */
285 move.l #(ICACHE_STATUS), %a1
290 .globl icache_disable
292 move.l #0x01F00000, %d0 /* Setup cache mask */
293 movec %d0, %CACR /* Invalidate icache */
298 move.l #(ICACHE_STATUS), %a1
305 move.l #(ICACHE_STATUS), %a1
309 .globl icache_invalid
311 move.l #0x80600610, %d0 /* Invalidate icache */
312 movec %d0, %CACR /* Enable and invalidate cache */
317 move.l #0x01200000, %d0 /* Invalid cache */
320 move.l #0x81300610, %d0
323 move.l #(DCACHE_STATUS), %a1
328 .globl dcache_disable
330 move.l #0x81600610, %d0 /* Setup cache mask */
331 movec %d0, %CACR /* Invalidate icache */
333 move.l #(DCACHE_STATUS), %a1
338 .globl dcache_invalid
340 move.l #0x81100610, %d0 /* Setup cache mask */
341 movec %d0, %CACR /* Enable and invalidate cache */
346 move.l #(DCACHE_STATUS), %a1
350 /*------------------------------------------------------------------------------*/
352 .globl version_string
354 .ascii U_BOOT_VERSION
355 .ascii " (", __DATE__, " - ", __TIME__, ")"
356 .ascii CONFIG_IDENT_STRING, "\0"