2 * (C) Copyright 2015 Angelo Dureghello <angelo@sysam.it>
3 * Based on code from Bernhard Kuhn <bkuhn@metrowerks.com>
5 * SPDX-License-Identifier: GPL-2.0+
8 #include <asm-offsets.h>
11 #include <asm/cache.h>
18 move.w #0x2700,%sr; /* disable intrs */
19 subl #60,%sp; /* space for 15 regs */
20 moveml %d0-%d7/%a0-%a6,%sp@
24 moveml %sp@,%d0-%d7/%a0-%a6;
25 addl #60,%sp; /* space for 15 regs */
29 /* If we come from a pre-loader we don't need an initial exception
32 #if !defined(CONFIG_MONITOR_IS_IN_RAM)
37 * Vector table. This is used for initial platform startup.
38 * These vectors are to catch any un-intended traps.
41 /* Flash offset is 0 until we setup CS0 */
43 #if defined(CONFIG_M5307) && \
44 (CONFIG_SYS_TEXT_BASE == CONFIG_SYS_INT_FLASH_BASE)
45 .long _start - CONFIG_SYS_TEXT_BASE
50 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
51 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
52 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
53 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
54 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
55 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
56 .long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
57 .long _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 .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 .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
96 /* set MBAR address + valid flag */
97 move.l #(CONFIG_SYS_MBAR + 1), %d0
100 move.l #(CONFIG_SYS_INIT_RAM_ADDR + 1), %d0
103 /* DS 4.8.2 (Cache Organization) invalidate and disable cache */
104 move.l #CF_CACR_CINVA, %d0
111 * if we come from a pre-loader we have no exception table and
112 * therefore no VBR to set
114 #if !defined(CONFIG_MONITOR_IS_IN_RAM)
115 move.l #CONFIG_SYS_FLASH_BASE, %d0
119 /* initialize general use internal ram */
121 move.l #(ICACHE_STATUS), %a1 /* icache */
122 move.l #(DCACHE_STATUS), %a2 /* dcache */
126 /* put relocation table address to a5 */
127 move.l #__got_start, %a5
129 /* setup stack initially on top of internal static ram */
130 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_SIZE), %sp
133 * if configured, malloc_f arena will be reserved first,
134 * then (and always) gd struct space will be reserved
137 bsr board_init_f_alloc_reserve
139 /* update stack and frame-pointers */
143 /* initialize reserved area */
145 bsr board_init_f_init_reserve
147 /* run low-level CPU init code (from flash) */
150 /* run low-level board init code (from flash) */
154 /* board_init_f() does not return */
156 /******************************************************************************/
159 * void relocate_code (addr_sp, gd, addr_moni)
161 * This "function" does not return, instead it continues in RAM
162 * after relocating the monitor code.
168 move.l 8(%a6), %sp /* set new stack pointer */
169 move.l 12(%a6), %d0 /* Save copy of Global Data pointer */
170 move.l 16(%a6), %a0 /* Save copy of Destination Address */
172 move.l #CONFIG_SYS_MONITOR_BASE, %a1
173 move.l #__init_end, %a2
175 /* copy the code to RAM */
177 move.l (%a1)+, (%a3)+
182 * We are done. Do not return, instead branch to second part of board
183 * initialization, now running from RAM.
186 add.l #(in_ram - CONFIG_SYS_MONITOR_BASE), %a1
193 * Now clear BSS segment
196 add.l #(_sbss - CONFIG_SYS_MONITOR_BASE), %a1
198 add.l #(_ebss - CONFIG_SYS_MONITOR_BASE), %d1
205 * fix got table in RAM
208 add.l #(__got_start - CONFIG_SYS_MONITOR_BASE), %a1
210 /* fix got pointer register a5 */
214 add.l #(__got_end - CONFIG_SYS_MONITOR_BASE), %a2
224 /* calculate relative jump to board_init_r in ram */
226 add.l #(board_init_r - CONFIG_SYS_MONITOR_BASE), %a1
228 /* set parameters for board_init_r */
229 move.l %a0,-(%sp) /* dest_addr */
230 move.l %d0,-(%sp) /* gd */
231 #if defined(DEBUG) && (CONFIG_SYS_TEXT_BASE!=CONFIG_SYS_INT_FLASH_BASE) && \
232 defined(CONFIG_SYS_HALT_BEFOR_RAM_JUMP)
237 /******************************************************************************/
260 /******************************************************************************/
262 .globl version_string
264 .ascii U_BOOT_VERSION
265 .ascii " (", U_BOOT_DATE, " - ", U_BOOT_TIME, ")"
266 .ascii CONFIG_IDENT_STRING, "\0"