1/* SPDX-License-Identifier: GPL-2.0+ */ 2/* 3 * Copyright (C) 2003 Josef Baumgartner <josef.baumgartner@telex.de> 4 * Based on code from Bernhard Kuhn <bkuhn@metrowerks.com> 5 */ 6 7#include <asm-offsets.h> 8#include <config.h> 9#include "version.h" 10#include <asm/cache.h> 11 12#define _START _start 13#define _FAULT _fault 14 15#define SAVE_ALL \ 16 move.w #0x2700,%sr; /* disable intrs */ \ 17 subl #60,%sp; /* space for 15 regs */ \ 18 moveml %d0-%d7/%a0-%a6,%sp@; 19 20#define RESTORE_ALL \ 21 moveml %sp@,%d0-%d7/%a0-%a6; \ 22 addl #60,%sp; /* space for 15 regs */ \ 23 rte; 24 25.text 26 27/* 28 * Vector table. This is used for initial platform startup. 29 * These vectors are to catch any un-intended traps. 30 */ 31_vectors: 32INITSP: .long 0x00000000 /* Initial SP */ 33INITPC: .long _START /* Initial PC */ 34 35vector02_0F: 36.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 37.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 38 39/* Reserved */ 40vector10_17: 41.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 42 43vector18_1F: 44.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 45 46/* TRAP #0 - #15 */ 47vector20_2F: 48.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 49.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 50 51/* Reserved */ 52vector30_3F: 53.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 54.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 55 56vector64_127: 57.long _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT 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 66vector128_191: 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.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 76vector192_255: 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 85 86.text 87 88.globl _start 89_start: 90 nop 91 nop 92 move.w #0x2700,%sr /* Mask off Interrupt */ 93 94 /* Set vector base register at the beginning of the Flash */ 95 move.l #CONFIG_SYS_FLASH_BASE, %d0 96 movec %d0, %VBR 97 98 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0 99 movec %d0, %RAMBAR0 100 101 move.l #(CONFIG_SYS_INIT_RAM1_ADDR + CONFIG_SYS_INIT_RAM1_CTRL), %d0 102 movec %d0, %RAMBAR1 103 104 move.l #CONFIG_SYS_MBAR, %d0 /* set MBAR address */ 105 move.c %d0, %MBAR 106 107 /* invalidate and disable cache */ 108 move.l #0x01040100, %d0 /* Invalidate cache cmd */ 109 movec %d0, %CACR /* Invalidate cache */ 110 move.l #0, %d0 111 movec %d0, %ACR0 112 movec %d0, %ACR1 113 movec %d0, %ACR2 114 movec %d0, %ACR3 115 116 /* initialize general use internal ram */ 117 move.l #0, %d0 118 move.l #(ICACHE_STATUS), %a1 /* icache */ 119 move.l #(DCACHE_STATUS), %a2 /* icache */ 120 move.l %d0, (%a1) 121 move.l %d0, (%a2) 122 123 /* put relocation table address to a5 */ 124 move.l #__got_start, %a5 125 126 /* setup stack initially on top of internal static ram */ 127 move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_SIZE), %sp 128 129 /* 130 * if configured, malloc_f arena will be reserved first, 131 * then (and always) gd struct space will be reserved 132 */ 133 move.l %sp, -(%sp) 134 bsr board_init_f_alloc_reserve 135 136 /* update stack and frame-pointers */ 137 move.l %d0, %sp 138 move.l %sp, %fp 139 140 /* initialize reserved area */ 141 move.l %d0, -(%sp) 142 bsr board_init_f_init_reserve 143 144 /* run low-level CPU init code (from flash) */ 145 jbsr cpu_init_f 146 147 /* run low-level board init code (from flash) */ 148 clr.l %sp@- 149 jbsr board_init_f 150 151 /* board_init_f() does not return */ 152 153/******************************************************************************/ 154 155/* 156 * void relocate_code (addr_sp, gd, addr_moni) 157 * 158 * This "function" does not return, instead it continues in RAM 159 * after relocating the monitor code. 160 * 161 * r3 = dest 162 * r4 = src 163 * r5 = length in bytes 164 * r6 = cachelinesize 165 */ 166.globl relocate_code 167relocate_code: 168 link.w %a6,#0 169 move.l 8(%a6), %sp /* set new stack pointer */ 170 171 move.l 12(%a6), %d0 /* Save copy of Global Data pointer */ 172 move.l 16(%a6), %a0 /* Save copy of Destination Address */ 173 174 move.l #CONFIG_SYS_MONITOR_BASE, %a1 175 move.l #__init_end, %a2 176 move.l %a0, %a3 177 178 /* copy the code to RAM */ 1791: 180 move.l (%a1)+, (%a3)+ 181 cmp.l %a1,%a2 182 bgt.s 1b 183 184/* 185 * We are done. Do not return, instead branch to second part of board 186 * initialization, now running from RAM. 187 */ 188 move.l %a0, %a1 189 add.l #(in_ram - CONFIG_SYS_MONITOR_BASE), %a1 190 jmp (%a1) 191 192in_ram: 193 194clear_bss: 195 /* 196 * Now clear BSS segment 197 */ 198 move.l %a0, %a1 199 add.l #(_sbss - CONFIG_SYS_MONITOR_BASE),%a1 200 move.l %a0, %d1 201 add.l #(_ebss - CONFIG_SYS_MONITOR_BASE),%d1 2026: 203 clr.l (%a1)+ 204 cmp.l %a1,%d1 205 bgt.s 6b 206 207 /* 208 * fix got table in RAM 209 */ 210 move.l %a0, %a1 211 add.l #(__got_start - CONFIG_SYS_MONITOR_BASE),%a1 212 move.l %a1,%a5 /* fix got pointer register a5 */ 213 214 move.l %a0, %a2 215 add.l #(__got_end - CONFIG_SYS_MONITOR_BASE),%a2 216 2177: 218 move.l (%a1),%d1 219 sub.l #_start,%d1 220 add.l %a0,%d1 221 move.l %d1,(%a1)+ 222 cmp.l %a2, %a1 223 bne 7b 224 225 /* calculate relative jump to board_init_r in ram */ 226 move.l %a0, %a1 227 add.l #(board_init_r - CONFIG_SYS_MONITOR_BASE), %a1 228 229 /* set parameters for board_init_r */ 230 move.l %a0,-(%sp) /* dest_addr */ 231 move.l %d0,-(%sp) /* gd */ 232 jsr (%a1) 233 234/******************************************************************************/ 235 236/* exception code */ 237.globl _fault 238_fault: 239 bra _fault 240 241.globl _exc_handler 242_exc_handler: 243 SAVE_ALL 244 movel %sp,%sp@- 245 bsr exc_handler 246 addql #4,%sp 247 RESTORE_ALL 248 249.globl _int_handler 250_int_handler: 251 SAVE_ALL 252 movel %sp,%sp@- 253 bsr int_handler 254 addql #4,%sp 255 RESTORE_ALL 256 257/******************************************************************************/ 258 259.globl version_string 260version_string: 261.ascii U_BOOT_VERSION_STRING, "\0" 262.align 4 263