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>
41 #include <asm/u-boot-i386.h>
44 #ifdef CONFIG_BITBANGMII
48 DECLARE_GLOBAL_DATA_PTR;
50 /* Exports from the Linker Script */
51 extern ulong __text_start;
52 extern ulong __data_end;
53 extern ulong __rel_dyn_start;
54 extern ulong __rel_dyn_end;
55 extern ulong __bss_start;
56 extern ulong __bss_size;
58 const char version_string[] =
59 U_BOOT_VERSION" (" U_BOOT_DATE " - " U_BOOT_TIME ")";
61 /************************************************************************
63 ************************************************************************
64 * Some of this code should be moved into the core functions,
65 * or dropped completely,
66 * but let's get it working (again) first...
68 static int init_baudrate (void)
70 char tmp[64]; /* long enough for environment variables */
71 int i = getenv_f("baudrate", tmp, 64);
73 gd->baudrate = (i != 0)
74 ? (int) simple_strtoul (tmp, NULL, 10)
80 static int display_banner (void)
83 printf ("\n\n%s\n\n", version_string);
85 printf ("U-Boot code: %08lX -> %08lX data: %08lX -> %08lX\n"
86 " BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
87 i386boot_start, i386boot_romdata_start-1,
88 i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
89 i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
90 i386boot_bss_start+i386boot_bss_size,
91 i386boot_bss_start+i386boot_bss_size+CONFIG_SYS_STACK_SIZE-1);
99 * WARNING: this code looks "cleaner" than the PowerPC version, but
100 * has the disadvantage that you either get nothing, or everything.
101 * On PowerPC, you might see "DRAM: " before the system hangs - which
102 * gives a simple yet clear indication which part of the
103 * initialization if failing.
105 static int display_dram_config (void)
109 puts ("DRAM Configuration:\n");
111 for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
112 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
113 print_size (gd->bd->bi_dram[i].size, "\n");
119 static void display_flash_config (ulong size)
122 print_size (size, "\n");
126 * Breath some life into the board...
128 * Initialize an SMC for serial comms, and carry out some hardware
131 * The first part of initialization is running from Flash memory;
132 * its main purpose is to initialize the RAM so that we
133 * can relocate the monitor code to RAM.
138 * All attempts to come up with a "common" initialization sequence
139 * that works for all boards and architectures failed: some of the
140 * requirements are just _too_ different. To get rid of the resulting
141 * mess of board dependend #ifdef'ed code we now make the whole
142 * initialization sequence configurable to the user.
144 * The requirements for any new initalization function is simple: it
145 * receives a pointer to the "global data" structure as it's only
146 * argument, and returns an integer return code, where 0 means
147 * "continue" and != 0 means "fatal error, hang the system".
149 typedef int (init_fnc_t) (void);
151 init_fnc_t *init_sequence[] = {
152 cpu_init_r, /* basic cpu dependent setup */
153 board_early_init_r, /* basic board dependent setup */
154 dram_init, /* configure available RAM banks */
155 interrupt_init, /* set up exceptions */
157 env_init, /* initialize environment */
158 init_baudrate, /* initialze baudrate settings */
159 serial_init, /* serial communications setup */
169 * Load U-Boot into RAM, initialize BSS, perform relocation adjustments
171 void board_init_f (ulong gdp)
173 void *text_start = &__text_start;
174 void *data_end = &__data_end;
175 Elf32_Rel *rel_dyn_start = (Elf32_Rel *)&__rel_dyn_start;
176 Elf32_Rel *rel_dyn_end = (Elf32_Rel *)&__rel_dyn_end;
177 void *bss_start = &__bss_start;
178 ulong bss_size = (ulong)&__bss_size;
185 uboot_size = (ulong)data_end - (ulong)text_start;
186 dest_addr = (void *)gdp - (uboot_size + (ulong)bss_size);
187 rel_offset = text_start - dest_addr;
189 /* First stage CPU initialization */
190 if (cpu_init_f() != 0)
193 /* First stage Board initialization */
194 if (board_early_init_f() != 0)
197 /* Copy U-Boot into RAM */
198 memcpy(dest_addr, text_start, uboot_size);
201 memset(bss_start - rel_offset, 0, bss_size);
203 /* Perform relocation adjustments */
204 for (re = rel_dyn_start; re < rel_dyn_end; re++)
206 if (re->r_offset >= TEXT_BASE)
207 if (*(ulong *)re->r_offset >= TEXT_BASE)
208 *(ulong *)(re->r_offset - rel_offset) -= (Elf32_Addr)rel_offset;
211 ((gd_t *)gdp)->reloc_off = rel_offset;
212 ((gd_t *)gdp)->flags |= GD_FLG_RELOC;
214 /* Enter the relocated U-Boot! */
215 (board_init_r - rel_offset)((gd_t *)gdp, (ulong)dest_addr);
217 /* NOTREACHED - board_init_f() does not return */
221 void board_init_r(gd_t *id, ulong dest_addr)
227 init_fnc_t **init_fnc_ptr;
229 show_boot_progress(0x21);
232 /* compiler optimization barrier needed for GCC >= 3.4 */
233 __asm__ __volatile__("": : :"memory");
236 memset (gd->bd, 0, sizeof (bd_t));
237 show_boot_progress(0x22);
239 gd->baudrate = CONFIG_BAUDRATE;
241 mem_malloc_init((((ulong)dest_addr - CONFIG_SYS_MALLOC_LEN)+3)&~3,
242 CONFIG_SYS_MALLOC_LEN);
244 for (init_fnc_ptr = init_sequence, i=0; *init_fnc_ptr; ++init_fnc_ptr, i++) {
245 show_boot_progress(0xa130|i);
247 if ((*init_fnc_ptr)() != 0) {
251 show_boot_progress(0x23);
253 #ifdef CONFIG_SERIAL_MULTI
256 /* configure available FLASH banks */
258 display_flash_config(size);
259 show_boot_progress(0x24);
261 show_boot_progress(0x25);
263 /* initialize environment */
265 show_boot_progress(0x26);
268 #ifdef CONFIG_CMD_NET
270 bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
273 #if defined(CONFIG_PCI)
275 * Do pci configuration
280 show_boot_progress(0x27);
287 /* Initialize the console (after the relocation and devices init) */
290 #ifdef CONFIG_MISC_INIT_R
291 /* miscellaneous platform dependent initialisations */
295 #if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
301 #if defined(CONFIG_CMD_KGDB)
307 /* enable exceptions */
309 show_boot_progress(0x28);
311 #ifdef CONFIG_STATUS_LED
312 status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
319 /* Initialize from environment */
320 if ((s = getenv ("loadaddr")) != NULL) {
321 load_addr = simple_strtoul (s, NULL, 16);
323 #if defined(CONFIG_CMD_NET)
324 if ((s = getenv ("bootfile")) != NULL) {
325 copy_filename (BootFile, s, sizeof (BootFile));
331 #if defined(CONFIG_CMD_IDE)
337 #if defined(CONFIG_CMD_SCSI)
343 #if defined(CONFIG_CMD_DOC)
349 #ifdef CONFIG_BITBANGMII
352 #if defined(CONFIG_CMD_NET)
353 #if defined(CONFIG_NET_MULTI)
357 eth_initialize(gd->bd);
360 #if ( defined(CONFIG_CMD_NET)) && (0)
363 puts ("Reset Ethernet PHY\n");
368 #ifdef CONFIG_LAST_STAGE_INIT
371 * Some parts can be only initialized if all others (like
372 * Interrupts) are up and running (i.e. the PC-style ISA
380 post_run (NULL, POST_RAM | post_bootmode_get(0));
384 show_boot_progress(0x29);
386 /* main_loop() can return to retry autoboot, if so just run it again. */
391 /* NOTREACHED - no way out of command loop except booting */
396 puts ("### ERROR ### Please RESET the board ###\n");
400 unsigned long do_go_exec (ulong (*entry)(int, char * const []), int argc, char * const argv[])
402 unsigned long ret = 0;
406 * x86 does not use a dedicated register to pass the pointer to
407 * the global_data, so it is instead passed as argv[-1]. By using
408 * argv[-1], the called 'Application' can use the contents of
409 * argv natively. However, to safely use argv[-1] a new copy of
410 * argv is needed with the extra element
412 argv_tmp = malloc(sizeof(char *) * (argc + 1));
415 argv_tmp[0] = (char *)gd;
417 memcpy(&argv_tmp[1], argv, (size_t)(sizeof(char *) * argc));
419 ret = (entry) (argc, &argv_tmp[1]);
426 void setup_pcat_compatibility(void)
427 __attribute__((weak, alias("__setup_pcat_compatibility")));
429 void __setup_pcat_compatibility(void)