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 static int calculate_relocation_address(void);
160 static int copy_uboot_to_ram(void);
161 static int clear_bss(void);
162 static int do_elf_reloc_fixups(void);
164 init_fnc_t *init_sequence_f[] = {
172 calculate_relocation_address,
180 init_fnc_t *init_sequence_r[] = {
181 cpu_init_r, /* basic cpu dependent setup */
182 board_early_init_r, /* basic board dependent setup */
183 dram_init, /* configure available RAM banks */
184 interrupt_init, /* set up exceptions */
194 static int calculate_relocation_address(void)
196 void *text_start = &__text_start;
197 void *bss_end = &__bss_end;
201 /* Calculate destination RAM Address and relocation offset */
202 dest_addr = (void *)gd->ram_size;
203 dest_addr -= CONFIG_SYS_STACK_SIZE;
204 dest_addr -= (bss_end - text_start);
205 rel_offset = dest_addr - text_start;
207 gd->start_addr_sp = gd->ram_size;
208 gd->relocaddr = (ulong)dest_addr;
209 gd->reloc_off = rel_offset;
214 static int copy_uboot_to_ram(void)
216 ulong *dst_addr = (ulong *)gd->relocaddr;
217 ulong *src_addr = (ulong *)&__text_start;
218 ulong *end_addr = (ulong *)&__data_end;
220 while (src_addr < end_addr)
221 *dst_addr++ = *src_addr++;
226 static int clear_bss(void)
228 void *bss_start = &__bss_start;
229 void *bss_end = &__bss_end;
231 ulong *dst_addr = (ulong *)(bss_start + gd->reloc_off);
232 ulong *end_addr = (ulong *)(bss_end + gd->reloc_off);;
234 while (dst_addr < end_addr)
235 *dst_addr++ = 0x00000000;
240 static int do_elf_reloc_fixups(void)
242 Elf32_Rel *re_src = (Elf32_Rel *)(&__rel_dyn_start);
243 Elf32_Rel *re_end = (Elf32_Rel *)(&__rel_dyn_end);
246 if (re_src->r_offset >= CONFIG_SYS_TEXT_BASE)
247 if (*(Elf32_Addr *)(re_src->r_offset + gd->reloc_off) >= CONFIG_SYS_TEXT_BASE)
248 *(Elf32_Addr *)(re_src->r_offset + gd->reloc_off) += gd->reloc_off;
249 } while (re_src++ < re_end);
255 * Load U-Boot into RAM, initialize BSS, perform relocation adjustments
257 void board_init_f(ulong boot_flags)
259 init_fnc_t **init_fnc_ptr;
261 for (init_fnc_ptr = init_sequence_f; *init_fnc_ptr; ++init_fnc_ptr) {
262 if ((*init_fnc_ptr)() != 0)
266 gd->flags |= GD_FLG_RELOC;
268 /* Enter the relocated U-Boot! */
269 relocate_code(gd->start_addr_sp, gd, gd->relocaddr);
271 /* NOTREACHED - relocate_code() does not return */
275 void board_init_r(gd_t *id, ulong dest_addr)
281 init_fnc_t **init_fnc_ptr;
283 show_boot_progress(0x21);
285 /* Global data pointer is now writable */
287 memcpy(gd, id, sizeof(gd_t));
289 /* compiler optimization barrier needed for GCC >= 3.4 */
290 __asm__ __volatile__("": : :"memory");
293 memset (gd->bd, 0, sizeof (bd_t));
294 show_boot_progress(0x22);
296 gd->baudrate = CONFIG_BAUDRATE;
298 mem_malloc_init((((ulong)dest_addr - CONFIG_SYS_MALLOC_LEN)+3)&~3,
299 CONFIG_SYS_MALLOC_LEN);
301 for (init_fnc_ptr = init_sequence_r; *init_fnc_ptr; ++init_fnc_ptr) {
302 if ((*init_fnc_ptr)() != 0)
305 show_boot_progress(0x23);
307 #ifdef CONFIG_SERIAL_MULTI
310 /* configure available FLASH banks */
312 display_flash_config(size);
313 show_boot_progress(0x24);
315 show_boot_progress(0x25);
317 /* initialize environment */
319 show_boot_progress(0x26);
322 #ifdef CONFIG_CMD_NET
324 bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
327 #if defined(CONFIG_PCI)
329 * Do pci configuration
334 show_boot_progress(0x27);
341 /* Initialize the console (after the relocation and devices init) */
344 #ifdef CONFIG_MISC_INIT_R
345 /* miscellaneous platform dependent initialisations */
349 #if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
355 #if defined(CONFIG_CMD_KGDB)
361 /* enable exceptions */
363 show_boot_progress(0x28);
365 #ifdef CONFIG_STATUS_LED
366 status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
373 /* Initialize from environment */
374 if ((s = getenv ("loadaddr")) != NULL) {
375 load_addr = simple_strtoul (s, NULL, 16);
377 #if defined(CONFIG_CMD_NET)
378 if ((s = getenv ("bootfile")) != NULL) {
379 copy_filename (BootFile, s, sizeof (BootFile));
385 #if defined(CONFIG_CMD_IDE)
391 #if defined(CONFIG_CMD_SCSI)
397 #if defined(CONFIG_CMD_DOC)
403 #ifdef CONFIG_BITBANGMII
406 #if defined(CONFIG_CMD_NET)
407 #if defined(CONFIG_NET_MULTI)
411 eth_initialize(gd->bd);
414 #if ( defined(CONFIG_CMD_NET)) && (0)
417 puts ("Reset Ethernet PHY\n");
422 #ifdef CONFIG_LAST_STAGE_INIT
425 * Some parts can be only initialized if all others (like
426 * Interrupts) are up and running (i.e. the PC-style ISA
434 post_run (NULL, POST_RAM | post_bootmode_get(0));
438 show_boot_progress(0x29);
440 /* main_loop() can return to retry autoboot, if so just run it again. */
445 /* NOTREACHED - no way out of command loop except booting */
450 puts ("### ERROR ### Please RESET the board ###\n");
454 unsigned long do_go_exec (ulong (*entry)(int, char * const []), int argc, char * const argv[])
456 unsigned long ret = 0;
460 * x86 does not use a dedicated register to pass the pointer to
461 * the global_data, so it is instead passed as argv[-1]. By using
462 * argv[-1], the called 'Application' can use the contents of
463 * argv natively. However, to safely use argv[-1] a new copy of
464 * argv is needed with the extra element
466 argv_tmp = malloc(sizeof(char *) * (argc + 1));
469 argv_tmp[0] = (char *)gd;
471 memcpy(&argv_tmp[1], argv, (size_t)(sizeof(char *) * argc));
473 ret = (entry) (argc, &argv_tmp[1]);
480 void setup_pcat_compatibility(void)
481 __attribute__((weak, alias("__setup_pcat_compatibility")));
483 void __setup_pcat_compatibility(void)