3 * Daniel Engström, 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
49 * Pointer to initial global data area
51 * Here we initialize it.
53 #undef XTRN_DECLARE_GLOBAL_DATA_PTR
54 #define XTRN_DECLARE_GLOBAL_DATA_PTR /* empty = allocate here */
55 DECLARE_GLOBAL_DATA_PTR = (gd_t *) (CONFIG_SYS_INIT_GD_ADDR);
58 /* Exports from the Linker Script */
59 extern ulong __text_start;
60 extern ulong __data_end;
61 extern ulong __rel_dyn_start;
62 extern ulong __rel_dyn_end;
63 extern ulong __bss_start;
64 extern ulong __bss_end;
66 const char version_string[] =
67 U_BOOT_VERSION" (" U_BOOT_DATE " - " U_BOOT_TIME ")";
69 /************************************************************************
71 ************************************************************************
72 * Some of this code should be moved into the core functions,
73 * or dropped completely,
74 * but let's get it working (again) first...
76 static int init_baudrate (void)
78 char tmp[64]; /* long enough for environment variables */
79 int i = getenv_f("baudrate", tmp, 64);
81 gd->baudrate = (i != 0)
82 ? (int) simple_strtoul (tmp, NULL, 10)
88 static int display_banner (void)
91 printf ("\n\n%s\n\n", version_string);
93 printf ("U-Boot code: %08lX -> %08lX data: %08lX -> %08lX\n"
94 " BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
95 i386boot_start, i386boot_romdata_start-1,
96 i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
97 i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
98 i386boot_bss_start+i386boot_bss_size,
99 i386boot_bss_start+i386boot_bss_size+CONFIG_SYS_STACK_SIZE-1);
107 * WARNING: this code looks "cleaner" than the PowerPC version, but
108 * has the disadvantage that you either get nothing, or everything.
109 * On PowerPC, you might see "DRAM: " before the system hangs - which
110 * gives a simple yet clear indication which part of the
111 * initialization if failing.
113 static int display_dram_config (void)
117 puts ("DRAM Configuration:\n");
119 for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
120 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
121 print_size (gd->bd->bi_dram[i].size, "\n");
127 static void display_flash_config (ulong size)
130 print_size (size, "\n");
134 * Breath some life into the board...
136 * Initialize an SMC for serial comms, and carry out some hardware
139 * The first part of initialization is running from Flash memory;
140 * its main purpose is to initialize the RAM so that we
141 * can relocate the monitor code to RAM.
146 * All attempts to come up with a "common" initialization sequence
147 * that works for all boards and architectures failed: some of the
148 * requirements are just _too_ different. To get rid of the resulting
149 * mess of board dependend #ifdef'ed code we now make the whole
150 * initialization sequence configurable to the user.
152 * The requirements for any new initalization function is simple: it
153 * receives a pointer to the "global data" structure as it's only
154 * argument, and returns an integer return code, where 0 means
155 * "continue" and != 0 means "fatal error, hang the system".
157 typedef int (init_fnc_t) (void);
159 init_fnc_t *init_sequence[] = {
160 cpu_init_r, /* basic cpu dependent setup */
161 board_early_init_r, /* basic board dependent setup */
162 dram_init, /* configure available RAM banks */
163 interrupt_init, /* set up exceptions */
165 env_init, /* initialize environment */
166 init_baudrate, /* initialze baudrate settings */
167 serial_init, /* serial communications setup */
177 * Load U-Boot into RAM, initialize BSS, perform relocation adjustments
179 void board_init_f(ulong boot_flags)
181 void *text_start = &__text_start;
182 void *data_end = &__data_end;
183 void *rel_dyn_start = &__rel_dyn_start;
184 void *rel_dyn_end = &__rel_dyn_end;
185 void *bss_start = &__bss_start;
186 void *bss_end = &__bss_end;
197 gd->flags = boot_flags;
199 /* Calculate destination RAM Address and relocation offset */
200 dest_addr = (void *)gd->ram_size;
201 dest_addr -= CONFIG_SYS_STACK_SIZE;
202 dest_addr -= (bss_end - text_start);
203 rel_offset = text_start - dest_addr;
205 /* Perform low-level initialization only when cold booted */
206 if (gd->flags & GD_FLG_COLD_BOOT) {
207 /* First stage CPU initialization */
208 if (cpu_init_f() != 0)
211 /* First stage Board initialization */
212 if (board_early_init_f() != 0)
216 /* Copy U-Boot into RAM */
217 dst_addr = (ulong *)dest_addr;
218 src_addr = (ulong *)(text_start + gd->load_off);
219 end_addr = (ulong *)(data_end + gd->load_off);
221 while (src_addr < end_addr)
222 *dst_addr++ = *src_addr++;
225 dst_addr = (ulong *)(bss_start - rel_offset);
226 end_addr = (ulong *)(bss_end - rel_offset);
228 while (dst_addr < end_addr)
229 *dst_addr++ = 0x00000000;
231 /* Perform relocation adjustments */
232 re_src = (Elf32_Rel *)(rel_dyn_start + gd->load_off);
233 re_end = (Elf32_Rel *)(rel_dyn_end + gd->load_off);
236 if (re_src->r_offset >= CONFIG_SYS_TEXT_BASE)
237 if (*(Elf32_Addr *)(re_src->r_offset - rel_offset) >= CONFIG_SYS_TEXT_BASE)
238 *(Elf32_Addr *)(re_src->r_offset - rel_offset) -= rel_offset;
239 } while (re_src++ < re_end);
241 gd->reloc_off = rel_offset;
242 gd->flags |= GD_FLG_RELOC;
244 /* Enter the relocated U-Boot! */
245 (board_init_r - rel_offset)(gd, (ulong)dest_addr);
247 /* NOTREACHED - board_init_f() does not return */
251 void board_init_r(gd_t *id, ulong dest_addr)
258 init_fnc_t **init_fnc_ptr;
260 show_boot_progress(0x21);
262 /* Global data pointer is now writable */
264 memcpy(gd, id, sizeof(gd_t));
266 /* compiler optimization barrier needed for GCC >= 3.4 */
267 __asm__ __volatile__("": : :"memory");
270 memset (gd->bd, 0, sizeof (bd_t));
271 show_boot_progress(0x22);
273 gd->baudrate = CONFIG_BAUDRATE;
275 mem_malloc_init((((ulong)dest_addr - CONFIG_SYS_MALLOC_LEN)+3)&~3,
276 CONFIG_SYS_MALLOC_LEN);
278 for (init_fnc_ptr = init_sequence, i=0; *init_fnc_ptr; ++init_fnc_ptr, i++) {
279 show_boot_progress(0xa130|i);
281 if ((*init_fnc_ptr)() != 0) {
285 show_boot_progress(0x23);
287 #ifdef CONFIG_SERIAL_MULTI
290 /* configure available FLASH banks */
292 display_flash_config(size);
293 show_boot_progress(0x24);
295 show_boot_progress(0x25);
297 /* initialize environment */
299 show_boot_progress(0x26);
302 #ifdef CONFIG_CMD_NET
304 bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
307 #if defined(CONFIG_PCI)
309 * Do pci configuration
314 show_boot_progress(0x27);
321 /* Initialize the console (after the relocation and devices init) */
324 #ifdef CONFIG_MISC_INIT_R
325 /* miscellaneous platform dependent initialisations */
329 #if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
335 #if defined(CONFIG_CMD_KGDB)
341 /* enable exceptions */
343 show_boot_progress(0x28);
345 #ifdef CONFIG_STATUS_LED
346 status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
353 /* Initialize from environment */
354 if ((s = getenv ("loadaddr")) != NULL) {
355 load_addr = simple_strtoul (s, NULL, 16);
357 #if defined(CONFIG_CMD_NET)
358 if ((s = getenv ("bootfile")) != NULL) {
359 copy_filename (BootFile, s, sizeof (BootFile));
365 #if defined(CONFIG_CMD_IDE)
371 #if defined(CONFIG_CMD_SCSI)
377 #if defined(CONFIG_CMD_DOC)
383 #ifdef CONFIG_BITBANGMII
386 #if defined(CONFIG_CMD_NET)
387 #if defined(CONFIG_NET_MULTI)
391 eth_initialize(gd->bd);
394 #if ( defined(CONFIG_CMD_NET)) && (0)
397 puts ("Reset Ethernet PHY\n");
402 #ifdef CONFIG_LAST_STAGE_INIT
405 * Some parts can be only initialized if all others (like
406 * Interrupts) are up and running (i.e. the PC-style ISA
414 post_run (NULL, POST_RAM | post_bootmode_get(0));
418 show_boot_progress(0x29);
420 /* main_loop() can return to retry autoboot, if so just run it again. */
425 /* NOTREACHED - no way out of command loop except booting */
430 puts ("### ERROR ### Please RESET the board ###\n");
434 unsigned long do_go_exec (ulong (*entry)(int, char * const []), int argc, char * const argv[])
436 unsigned long ret = 0;
440 * x86 does not use a dedicated register to pass the pointer to
441 * the global_data, so it is instead passed as argv[-1]. By using
442 * argv[-1], the called 'Application' can use the contents of
443 * argv natively. However, to safely use argv[-1] a new copy of
444 * argv is needed with the extra element
446 argv_tmp = malloc(sizeof(char *) * (argc + 1));
449 argv_tmp[0] = (char *)gd;
451 memcpy(&argv_tmp[1], argv, (size_t)(sizeof(char *) * argc));
453 ret = (entry) (argc, &argv_tmp[1]);
460 void setup_pcat_compatibility(void)
461 __attribute__((weak, alias("__setup_pcat_compatibility")));
463 void __setup_pcat_compatibility(void)