3 * Daniel Engstr�m, Omicron Ceti AB, daniel@omicron.se
6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
9 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
10 * Marius Groeger <mgroeger@sysgo.de>
12 * See file CREDITS for list of people who contributed to this
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License as
17 * published by the Free Software Foundation; either version 2 of
18 * the License, or (at your option) any later version.
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY; without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 * GNU General Public License for more details.
25 * You should have received a copy of the GNU General Public License
26 * along with this program; if not, write to the Free Software
27 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
34 #include <stdio_dev.h>
35 #include <timestamp.h>
40 #include <asm/u-boot-i386.h>
43 #ifdef CONFIG_BITBANGMII
47 DECLARE_GLOBAL_DATA_PTR;
49 /* Exports from the Linker Script */
50 extern ulong _i386boot_text_start;
51 extern ulong _i386boot_rel_dyn_start;
52 extern ulong _i386boot_rel_dyn_end;
53 extern ulong _i386boot_bss_start;
54 extern ulong _i386boot_bss_size;
55 void ram_bootstrap (void *);
56 const char version_string[] =
57 U_BOOT_VERSION" (" U_BOOT_DATE " - " U_BOOT_TIME ")";
59 /************************************************************************
61 ************************************************************************
62 * Some of this code should be moved into the core functions,
63 * or dropped completely,
64 * but let's get it working (again) first...
66 static int init_baudrate (void)
68 char tmp[64]; /* long enough for environment variables */
69 int i = getenv_r("baudrate", tmp, 64);
71 gd->baudrate = (i != 0)
72 ? (int) simple_strtoul (tmp, NULL, 10)
78 static int display_banner (void)
81 printf ("\n\n%s\n\n", version_string);
83 printf ("U-Boot code: %08lX -> %08lX data: %08lX -> %08lX\n"
84 " BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
85 i386boot_start, i386boot_romdata_start-1,
86 i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
87 i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
88 i386boot_bss_start+i386boot_bss_size,
89 i386boot_bss_start+i386boot_bss_size+CONFIG_SYS_STACK_SIZE-1);
97 * WARNING: this code looks "cleaner" than the PowerPC version, but
98 * has the disadvantage that you either get nothing, or everything.
99 * On PowerPC, you might see "DRAM: " before the system hangs - which
100 * gives a simple yet clear indication which part of the
101 * initialization if failing.
103 static int display_dram_config (void)
107 puts ("DRAM Configuration:\n");
109 for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
110 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
111 print_size (gd->bd->bi_dram[i].size, "\n");
117 static void display_flash_config (ulong size)
120 print_size (size, "\n");
124 * Breath some life into the board...
126 * Initialize an SMC for serial comms, and carry out some hardware
129 * The first part of initialization is running from Flash memory;
130 * its main purpose is to initialize the RAM so that we
131 * can relocate the monitor code to RAM.
136 * All attempts to come up with a "common" initialization sequence
137 * that works for all boards and architectures failed: some of the
138 * requirements are just _too_ different. To get rid of the resulting
139 * mess of board dependend #ifdef'ed code we now make the whole
140 * initialization sequence configurable to the user.
142 * The requirements for any new initalization function is simple: it
143 * receives a pointer to the "global data" structure as it's only
144 * argument, and returns an integer return code, where 0 means
145 * "continue" and != 0 means "fatal error, hang the system".
147 typedef int (init_fnc_t) (void);
149 init_fnc_t *init_sequence[] = {
151 cpu_init_r, /* basic cpu dependent setup */
152 board_early_init_r, /* basic board dependent setup */
153 dram_init, /* configure available RAM banks */
154 interrupt_init, /* set up exceptions */
156 env_init, /* initialize environment */
157 init_baudrate, /* initialze baudrate settings */
158 serial_init, /* serial communications setup */
168 * Load U-Boot into RAM, initialize BSS, perform relocation adjustments
170 void board_init_f (ulong stack_limit)
172 void *text_start = &_i386boot_text_start;
173 void *u_boot_cmd_end = &__u_boot_cmd_end;
174 Elf32_Rel *rel_dyn_start = (Elf32_Rel *)&_i386boot_rel_dyn_start;
175 Elf32_Rel *rel_dyn_end = (Elf32_Rel *)&_i386boot_rel_dyn_end;
176 void *bss_start = &_i386boot_bss_start;
177 void *bss_size = &_i386boot_bss_size;
184 void (*start_func)(void *);
186 /* compiler optimization barrier needed for GCC >= 3.4 */
187 __asm__ __volatile__("": : :"memory");
189 uboot_size = (size_t)u_boot_cmd_end - (size_t)text_start;
190 ram_start = (void *)stack_limit - (uboot_size + (ulong)bss_size);
191 rel_offset = text_start - ram_start;
192 start_func = ram_bootstrap - rel_offset;
194 /* First stage CPU initialization */
195 if (cpu_init_f() != 0)
198 /* First stage Board initialization */
199 if (board_early_init_f() != 0)
202 /* Copy U-Boot into RAM */
203 memcpy(ram_start, text_start, (size_t)uboot_size);
206 memset(bss_start - rel_offset, 0, (size_t)bss_size);
208 /* Perform relocation adjustments */
209 for (re = rel_dyn_start; re < rel_dyn_end; re++)
211 if (re->r_offset >= TEXT_BASE)
212 if (*(ulong *)re->r_offset >= TEXT_BASE)
213 *(ulong *)(re->r_offset - rel_offset) -= (Elf32_Addr)rel_offset;
216 start_func(ram_start);
218 /* NOTREACHED - relocate_code() does not return */
223 * All attempts to jump straight from board_init_f() to board_init_r()
224 * have failed, hence this special 'bootstrap' function.
226 void ram_bootstrap (void *ram_start)
230 /* compiler optimization barrier needed for GCC >= 3.4 */
231 __asm__ __volatile__("": : :"memory");
233 board_init_r(&gd_data, (ulong)ram_start);
236 void board_init_r(gd_t *id, ulong ram_start)
242 init_fnc_t **init_fnc_ptr;
244 show_boot_progress(0x21);
247 /* compiler optimization barrier needed for GCC >= 3.4 */
248 __asm__ __volatile__("": : :"memory");
250 memset (gd, 0, sizeof (gd_t));
252 memset (gd->bd, 0, sizeof (bd_t));
253 show_boot_progress(0x22);
255 gd->baudrate = CONFIG_BAUDRATE;
257 gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
259 mem_malloc_init((((ulong)ram_start - CONFIG_SYS_MALLOC_LEN)+3)&~3,
260 CONFIG_SYS_MALLOC_LEN);
262 for (init_fnc_ptr = init_sequence, i=0; *init_fnc_ptr; ++init_fnc_ptr, i++) {
263 show_boot_progress(0xa130|i);
265 if ((*init_fnc_ptr)() != 0) {
269 show_boot_progress(0x23);
271 /* configure available FLASH banks */
273 display_flash_config(size);
274 show_boot_progress(0x24);
276 show_boot_progress(0x25);
278 /* initialize environment */
280 show_boot_progress(0x26);
284 bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
286 #if defined(CONFIG_PCI)
288 * Do pci configuration
293 show_boot_progress(0x27);
300 /* Initialize the console (after the relocation and devices init) */
303 #ifdef CONFIG_MISC_INIT_R
304 /* miscellaneous platform dependent initialisations */
308 #if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
314 #if defined(CONFIG_CMD_KGDB)
320 /* enable exceptions */
322 show_boot_progress(0x28);
324 /* Must happen after interrupts are initialized since
325 * an irq handler gets installed
327 #ifdef CONFIG_SERIAL_SOFTWARE_FIFO
328 serial_buffered_init();
331 #ifdef CONFIG_STATUS_LED
332 status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
339 /* Initialize from environment */
340 if ((s = getenv ("loadaddr")) != NULL) {
341 load_addr = simple_strtoul (s, NULL, 16);
343 #if defined(CONFIG_CMD_NET)
344 if ((s = getenv ("bootfile")) != NULL) {
345 copy_filename (BootFile, s, sizeof (BootFile));
351 #if defined(CONFIG_CMD_IDE)
357 #if defined(CONFIG_CMD_SCSI)
363 #if defined(CONFIG_CMD_DOC)
369 #ifdef CONFIG_BITBANGMII
372 #if defined(CONFIG_CMD_NET)
373 #if defined(CONFIG_NET_MULTI)
377 eth_initialize(gd->bd);
380 #if ( defined(CONFIG_CMD_NET)) && (0)
383 puts ("Reset Ethernet PHY\n");
388 #ifdef CONFIG_LAST_STAGE_INIT
391 * Some parts can be only initialized if all others (like
392 * Interrupts) are up and running (i.e. the PC-style ISA
400 post_run (NULL, POST_RAM | post_bootmode_get(0));
404 show_boot_progress(0x29);
406 /* main_loop() can return to retry autoboot, if so just run it again. */
411 /* NOTREACHED - no way out of command loop except booting */
416 puts ("### ERROR ### Please RESET the board ###\n");
420 unsigned long do_go_exec (ulong (*entry)(int, char *[]), int argc, char *argv[])
423 * TODO: Test this function - changed to fix compiler error.
425 * return (entry >> 1) (argc, argv);
426 * with a comment about Nios function pointers are address >> 1
428 return (entry) (argc, argv);