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Kconfig: Move config IDENT_STRING to Kconfig
[people/ms/u-boot.git] / arch / m68k / cpu / mcf547x_8x / start.S
CommitLineData
570c0186
TL		 1/*
2 * Copyright (C) 2003 Josef Baumgartner <josef.baumgartner@telex.de>
3 * Based on code from Bernhard Kuhn <bkuhn@metrowerks.com>
4 *
3765b3e7 5 * SPDX-License-Identifier: GPL-2.0+
570c0186
TL		 6 */
7
25ddd1fb 8#include <asm-offsets.h>
570c0186
TL		 9#include <config.h>
10#include "version.h"
dd9f054e 11#include <asm/cache.h>
570c0186 12
570c0186
TL		 13#define _START _start
14#define _FAULT _fault
15
16#define SAVE_ALL \
17 move.w #0x2700,%sr; /* disable intrs */ \
18 subl #60,%sp; /* space for 15 regs */ \
19 moveml %d0-%d7/%a0-%a6,%sp@;
20
21#define RESTORE_ALL \
22 moveml %sp@,%d0-%d7/%a0-%a6; \
23 addl #60,%sp; /* space for 15 regs */ \
24 rte;
25
26.text
5c928d02 27
570c0186 28/*
5c928d02
AD		 29 * Vector table. This is used for initial platform startup.
30 * These vectors are to catch any un-intended traps.
570c0186
TL		 31 */
32_vectors:
5c928d02
AD		 33INITSP: .long 0x00000000 /* Initial SP */
34INITPC: .long _START /* Initial PC */
570c0186 35
5c928d02
AD		 36vector02_0F:
37.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
38.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
570c0186
TL		 39
40/* Reserved */
41vector10_17:
42.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
43
5c928d02
AD		 44vector18_1F:
45.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
570c0186
TL		 46
47/* TRAP #0 - #15 */
48vector20_2F:
49.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
50.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
51
52/* Reserved */
53vector30_3F:
54.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
55.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
56
57vector64_127:
58.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
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
67vector128_191:
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
76
77vector192_255:
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
85.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
86
5c928d02 87.text
570c0186 88
5c928d02 89.globl _start
570c0186
TL		 90_start:
91 nop
92 nop
5c928d02 93 move.w #0x2700,%sr /* Mask off Interrupt */
570c0186
TL		 94
95 /* Set vector base register at the beginning of the Flash */
6d0f6bcf 96 move.l #CONFIG_SYS_FLASH_BASE, %d0
570c0186
TL		 97 movec %d0, %VBR
98
6d0f6bcf 99 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0
570c0186
TL		 100 movec %d0, %RAMBAR0
101
6d0f6bcf 102 move.l #(CONFIG_SYS_INIT_RAM1_ADDR + CONFIG_SYS_INIT_RAM1_CTRL), %d0
570c0186
TL		 103 movec %d0, %RAMBAR1
104
5c928d02 105 move.l #CONFIG_SYS_MBAR, %d0 /* set MBAR address */
570c0186
TL		 106 move.c %d0, %MBAR
107
108 /* invalidate and disable cache */
109 move.l #0x01040100, %d0 /* Invalidate cache cmd */
110 movec %d0, %CACR /* Invalidate cache */
111 move.l #0, %d0
112 movec %d0, %ACR0
113 movec %d0, %ACR1
114 movec %d0, %ACR2
115 movec %d0, %ACR3
116
117 /* initialize general use internal ram */
5c928d02
AD		 118 move.l #0, %d0
119 move.l #(ICACHE_STATUS), %a1 /* icache */
120 move.l #(DCACHE_STATUS), %a2 /* icache */
121 move.l %d0, (%a1)
122 move.l %d0, (%a2)
570c0186 123
5044c9cc 124 /* put relocation table address to a5 */
5c928d02 125 move.l #__got_start, %a5
570c0186 126
5044c9cc 127 /* setup stack initially on top of internal static ram */
5c928d02 128 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_SIZE), %sp
5044c9cc 129
130 /*
131 * if configured, malloc_f arena will be reserved first,
132 * then (and always) gd struct space will be reserved
133 */
134 move.l %sp, -(%sp)
135 bsr board_init_f_alloc_reserve
136
137 /* update stack and frame-pointers */
138 move.l %d0, %sp
139 move.l %sp, %fp
140
141 /* initialize reserved area */
5c928d02
AD		 142 move.l %d0, -(%sp)
143 bsr board_init_f_init_reserve
144
145 /* run low-level CPU init code (from flash) */
146 jbsr cpu_init_f
570c0186 147
5c928d02
AD		 148 /* run low-level board init code (from flash) */
149 clr.l %sp@-
150 jbsr board_init_f
570c0186
TL		 151
152 /* board_init_f() does not return */
153
5c928d02 154/******************************************************************************/
570c0186
TL		 155
156/*
157 * void relocate_code (addr_sp, gd, addr_moni)
158 *
159 * This "function" does not return, instead it continues in RAM
160 * after relocating the monitor code.
161 *
162 * r3 = dest
163 * r4 = src
164 * r5 = length in bytes
165 * r6 = cachelinesize
166 */
5c928d02 167.globl relocate_code
570c0186 168relocate_code:
5c928d02
AD		 169 link.w %a6,#0
170 move.l 8(%a6), %sp /* set new stack pointer */
570c0186 171
5c928d02
AD		 172 move.l 12(%a6), %d0 /* Save copy of Global Data pointer */
173 move.l 16(%a6), %a0 /* Save copy of Destination Address */
570c0186 174
5c928d02
AD		 175 move.l #CONFIG_SYS_MONITOR_BASE, %a1
176 move.l #__init_end, %a2
177 move.l %a0, %a3
570c0186
TL		 178
179 /* copy the code to RAM */
1801:
5c928d02
AD		 181 move.l (%a1)+, (%a3)+
182 cmp.l %a1,%a2
183 bgt.s 1b
570c0186
TL		 184
185/*
186 * We are done. Do not return, instead branch to second part of board
187 * initialization, now running from RAM.
188 */
189 move.l %a0, %a1
6d0f6bcf 190 add.l #(in_ram - CONFIG_SYS_MONITOR_BASE), %a1
570c0186
TL		 191 jmp (%a1)
192
193in_ram:
194
195clear_bss:
196 /*
197 * Now clear BSS segment
198 */
199 move.l %a0, %a1
6d0f6bcf 200 add.l #(_sbss - CONFIG_SYS_MONITOR_BASE),%a1
570c0186 201 move.l %a0, %d1
6d0f6bcf 202 add.l #(_ebss - CONFIG_SYS_MONITOR_BASE),%d1
570c0186
TL		 2036:
204 clr.l (%a1)+
205 cmp.l %a1,%d1
206 bgt.s 6b
207
208 /*
209 * fix got table in RAM
210 */
211 move.l %a0, %a1
6d0f6bcf 212 add.l #(__got_start - CONFIG_SYS_MONITOR_BASE),%a1
5c928d02 213 move.l %a1,%a5 /* fix got pointer register a5 */
570c0186
TL		 214
215 move.l %a0, %a2
6d0f6bcf 216 add.l #(__got_end - CONFIG_SYS_MONITOR_BASE),%a2
570c0186
TL		 217
2187:
219 move.l (%a1),%d1
220 sub.l #_start,%d1
221 add.l %a0,%d1
222 move.l %d1,(%a1)+
223 cmp.l %a2, %a1
224 bne 7b
225
226 /* calculate relative jump to board_init_r in ram */
5c928d02
AD		 227 move.l %a0, %a1
228 add.l #(board_init_r - CONFIG_SYS_MONITOR_BASE), %a1
570c0186
TL		 229
230 /* set parameters for board_init_r */
5c928d02
AD		 231 move.l %a0,-(%sp) /* dest_addr */
232 move.l %d0,-(%sp) /* gd */
570c0186
TL		 233 jsr (%a1)
234
5c928d02
AD		 235/******************************************************************************/
236
570c0186 237/* exception code */
5c928d02 238.globl _fault
570c0186 239_fault:
5c928d02 240 bra _fault
570c0186 241
5c928d02 242.globl _exc_handler
570c0186
TL		 243_exc_handler:
244 SAVE_ALL
245 movel %sp,%sp@-
5c928d02 246 bsr exc_handler
570c0186
TL		 247 addql #4,%sp
248 RESTORE_ALL
249
5c928d02 250.globl _int_handler
570c0186
TL		 251_int_handler:
252 SAVE_ALL
253 movel %sp,%sp@-
5c928d02 254 bsr int_handler
570c0186
TL		 255 addql #4,%sp
256 RESTORE_ALL
257
5c928d02 258/******************************************************************************/
570c0186 259
5c928d02 260.globl version_string
570c0186 261version_string:
5c928d02
AD		 262.ascii U_BOOT_VERSION_STRING, "\0"
263.align 4
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