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Kconfig: Move config IDENT_STRING to Kconfig
[people/ms/u-boot.git] / arch / m68k / cpu / mcf532x / start.S
CommitLineData
8e585f02
TL		 1/*
2 * Copyright (C) 2003 Josef Baumgartner <josef.baumgartner@telex.de>
3 * Based on code from Bernhard Kuhn <bkuhn@metrowerks.com>
4 *
536e7dac
TL		 5 * (C) Copyright 2004-2008 Freescale Semiconductor, Inc.
6 * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
7 *
3765b3e7 8 * SPDX-License-Identifier: GPL-2.0+
8e585f02
TL		 9 */
10
25ddd1fb 11#include <asm-offsets.h>
8e585f02
TL		 12#include <config.h>
13#include "version.h"
dd9f054e 14#include <asm/cache.h>
8e585f02 15
8e585f02
TL		 16#define _START _start
17#define _FAULT _fault
18
8e585f02
TL		 19#define SAVE_ALL \
20 move.w #0x2700,%sr; /* disable intrs */ \
21 subl #60,%sp; /* space for 15 regs */ \
22 moveml %d0-%d7/%a0-%a6,%sp@;
23
24#define RESTORE_ALL \
25 moveml %sp@,%d0-%d7/%a0-%a6; \
26 addl #60,%sp; /* space for 15 regs */ \
27 rte;
28
c7de810c 29#if !defined(CONFIG_MONITOR_IS_IN_RAM)
5c928d02 30
8e585f02 31.text
5c928d02 32
8e585f02 33/*
5c928d02
AD		 34 * Vector table. This is used for initial platform startup.
35 * These vectors are to catch any un-intended traps.
8e585f02
TL		 36 */
37_vectors:
5c928d02
AD		 38INITSP: .long 0x00000000 /* Initial SP */
39INITPC: .long _START /* Initial PC */
8e585f02 40
5c928d02
AD		 41vector02_0F:
42.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
43.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
ddd104f1
TL		 44
45/* Reserved */
8e585f02
TL		 46vector10_17:
47.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
48
5c928d02
AD		 49vector18_1F:
50.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
8e585f02
TL		 51
52/* TRAP #0 - #15 */
53vector20_2F:
54.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
55.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
56
57/* Reserved */
58vector30_3F:
59.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
60.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
61
62vector64_127:
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, _FAULT, _FAULT
71
72vector128_191:
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
80.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
81
82vector192_255:
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
89.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
90.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
c7de810c 91#endif /* !defined(CONFIG_MONITOR_IS_IN_RAM) */
8e585f02 92
5c928d02 93.text
8e585f02 94
5c928d02 95.globl _start
8e585f02
TL		 96_start:
97 nop
98 nop
5c928d02 99 move.w #0x2700,%sr /* Mask off Interrupt */
8e585f02 100
c7de810c 101#if !defined(CONFIG_MONITOR_IS_IN_RAM)
ddd104f1 102 /* Set vector base register at the beginning of the Flash */
6d0f6bcf 103 move.l #CONFIG_SYS_FLASH_BASE, %d0
8e585f02 104 movec %d0, %VBR
c7de810c 105#endif
8e585f02 106
6d0f6bcf 107 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0
c67e12e7 108 movec %d0, %RAMBAR1
8e585f02
TL		 109
110 /* invalidate and disable cache */
dd9f054e 111 move.l #CF_CACR_CINVA, %d0 /* Invalidate cache cmd */
8e585f02
TL		 112 movec %d0, %CACR /* Invalidate cache */
113 move.l #0, %d0
114 movec %d0, %ACR0
115 movec %d0, %ACR1
116
536e7dac
TL		 117#ifdef CONFIG_MCF5301x
118 move.l #(0xFC0a0010), %a0
119 move.w (%a0), %d0
120 and.l %d0, 0xEFFF
121
122 move.w %d0, (%a0)
123#endif
124
8e585f02 125 /* initialize general use internal ram */
5c928d02
AD		 126 move.l #0, %d0
127 move.l #(ICACHE_STATUS), %a1 /* icache */
128 move.l #(DCACHE_STATUS), %a2 /* icache */
129 move.l %d0, (%a1)
130 move.l %d0, (%a2)
8e585f02 131
5044c9cc 132 /* put relocation table address to a5 */
5c928d02 133 move.l #__got_start, %a5
8e585f02 134
5044c9cc 135 /* setup stack initially on top of internal static ram */
136 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_SIZE), %sp
137
138 /*
139 * if configured, malloc_f arena will be reserved first,
140 * then (and always) gd struct space will be reserved
141 */
142 move.l %sp, -(%sp)
143 move.l #board_init_f_alloc_reserve, %a1
144 jsr (%a1)
145
146 /* update stack and frame-pointers */
147 move.l %d0, %sp
148 move.l %sp, %fp
149
150 /* initialize reserved area */
5c928d02 151 move.l %d0, -(%sp)
5044c9cc 152 move.l #board_init_f_init_reserve, %a1
153 jsr (%a1)
8e585f02 154
55ac54c4 155 /* run low-level CPU init code (from flash) */
5c928d02
AD		 156 move.l #cpu_init_f, %a1
157 jsr (%a1)
158
55ac54c4 159 /* run low-level board init code (from flash) */
5044c9cc 160 clr.l %sp@-
55ac54c4 161 move.l #board_init_f, %a1
162 jsr (%a1)
8e585f02
TL		 163
164 /* board_init_f() does not return */
165
5c928d02 166/******************************************************************************/
8e585f02
TL		 167
168/*
169 * void relocate_code (addr_sp, gd, addr_moni)
170 *
171 * This "function" does not return, instead it continues in RAM
172 * after relocating the monitor code.
173 *
174 * r3 = dest
175 * r4 = src
176 * r5 = length in bytes
177 * r6 = cachelinesize
178 */
5c928d02 179.globl relocate_code
8e585f02 180relocate_code:
5c928d02
AD		 181 link.w %a6,#0
182 move.l 8(%a6), %sp /* set new stack pointer */
8e585f02 183
5c928d02
AD		 184 move.l 12(%a6), %d0 /* Save copy of Global Data pointer */
185 move.l 16(%a6), %a0 /* Save copy of Destination Address */
8e585f02 186
5c928d02
AD		 187 move.l #CONFIG_SYS_MONITOR_BASE, %a1
188 move.l #__init_end, %a2
189 move.l %a0, %a3
8e585f02
TL		 190
191 /* copy the code to RAM */
1921:
5c928d02
AD		 193 move.l (%a1)+, (%a3)+
194 cmp.l %a1,%a2
195 bgt.s 1b
8e585f02
TL		 196
197/*
198 * We are done. Do not return, instead branch to second part of board
199 * initialization, now running from RAM.
200 */
201 move.l %a0, %a1
6d0f6bcf 202 add.l #(in_ram - CONFIG_SYS_MONITOR_BASE), %a1
8e585f02
TL		 203 jmp (%a1)
204
205in_ram:
206
207clear_bss:
208 /*
209 * Now clear BSS segment
210 */
211 move.l %a0, %a1
6d0f6bcf 212 add.l #(_sbss - CONFIG_SYS_MONITOR_BASE),%a1
8e585f02 213 move.l %a0, %d1
6d0f6bcf 214 add.l #(_ebss - CONFIG_SYS_MONITOR_BASE),%d1
8e585f02
TL		 2156:
216 clr.l (%a1)+
217 cmp.l %a1,%d1
218 bgt.s 6b
219
220 /*
221 * fix got table in RAM
222 */
223 move.l %a0, %a1
6d0f6bcf 224 add.l #(__got_start - CONFIG_SYS_MONITOR_BASE),%a1
5c928d02 225 move.l %a1,%a5 /* fix got pointer register a5 */
8e585f02
TL		 226
227 move.l %a0, %a2
6d0f6bcf 228 add.l #(__got_end - CONFIG_SYS_MONITOR_BASE),%a2
8e585f02
TL		 229
2307:
231 move.l (%a1),%d1
232 sub.l #_start,%d1
233 add.l %a0,%d1
234 move.l %d1,(%a1)+
235 cmp.l %a2, %a1
236 bne 7b
237
238 /* calculate relative jump to board_init_r in ram */
5c928d02
AD		 239 move.l %a0, %a1
240 add.l #(board_init_r - CONFIG_SYS_MONITOR_BASE), %a1
8e585f02
TL		 241
242 /* set parameters for board_init_r */
5c928d02
AD		 243 move.l %a0,-(%sp) /* dest_addr */
244 move.l %d0,-(%sp) /* gd */
8e585f02
TL		 245 jsr (%a1)
246
5c928d02
AD		 247/******************************************************************************/
248
8e585f02 249/* exception code */
5c928d02 250.globl _fault
8e585f02 251_fault:
37d6cc31 252 bra _fault
8e585f02 253
5c928d02 254.globl _exc_handler
8e585f02
TL		 255_exc_handler:
256 SAVE_ALL
257 movel %sp,%sp@-
5c928d02 258 bsr exc_handler
8e585f02
TL		 259 addql #4,%sp
260 RESTORE_ALL
261
5c928d02 262.globl _int_handler
8e585f02
TL		 263_int_handler:
264 SAVE_ALL
265 movel %sp,%sp@-
5c928d02 266 bsr int_handler
8e585f02
TL		 267 addql #4,%sp
268 RESTORE_ALL
269
5c928d02
AD		 270/******************************************************************************/
271
272.globl version_string
8e585f02 273version_string:
5c928d02
AD		 274.ascii U_BOOT_VERSION_STRING, "\0"
275.align 4
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