2 * (C) Copyright 2008-2011
3 * Graeme Russ, <graeme.russ@gmail.com>
6 * Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
9 * Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
12 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
13 * Marius Groeger <mgroeger@sysgo.de>
15 * See file CREDITS for list of people who contributed to this
18 * This program is free software; you can redistribute it and/or
19 * modify it under the terms of the GNU General Public License as
20 * published by the Free Software Foundation; either version 2 of
21 * the License, or (at your option) any later version.
23 * This program is distributed in the hope that it will be useful,
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 * GNU General Public License for more details.
28 * You should have received a copy of the GNU General Public License
29 * along with this program; if not, write to the Free Software
30 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
37 #include <stdio_dev.h>
38 #include <timestamp.h>
44 #include <asm/u-boot-x86.h>
47 #ifdef CONFIG_BITBANGMII
52 * Pointer to initial global data area
54 * Here we initialize it.
56 #undef XTRN_DECLARE_GLOBAL_DATA_PTR
57 #define XTRN_DECLARE_GLOBAL_DATA_PTR /* empty = allocate here */
58 DECLARE_GLOBAL_DATA_PTR = (gd_t *) (CONFIG_SYS_INIT_GD_ADDR);
61 /* Exports from the Linker Script */
62 extern ulong __text_start;
63 extern ulong __data_end;
64 extern ulong __rel_dyn_start;
65 extern ulong __rel_dyn_end;
66 extern ulong __bss_start;
67 extern ulong __bss_end;
69 const char version_string[] =
70 U_BOOT_VERSION" (" U_BOOT_DATE " - " U_BOOT_TIME ")";
72 /************************************************************************
74 ************************************************************************
75 * Some of this code should be moved into the core functions,
76 * or dropped completely,
77 * but let's get it working (again) first...
79 static int init_baudrate (void)
81 char tmp[64]; /* long enough for environment variables */
82 int i = getenv_f("baudrate", tmp, 64);
84 gd->baudrate = (i != 0)
85 ? (int) simple_strtoul (tmp, NULL, 10)
91 static int display_banner (void)
94 printf ("\n\n%s\n\n", version_string);
96 printf ("U-Boot code: %08lX -> %08lX data: %08lX -> %08lX\n"
97 " BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
98 i386boot_start, i386boot_romdata_start-1,
99 i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
100 i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
101 i386boot_bss_start+i386boot_bss_size,
102 i386boot_bss_start+i386boot_bss_size+CONFIG_SYS_STACK_SIZE-1);
109 static int display_dram_config (void)
113 puts ("DRAM Configuration:\n");
115 for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
116 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
117 print_size (gd->bd->bi_dram[i].size, "\n");
123 static void display_flash_config (ulong size)
126 print_size (size, "\n");
130 * Breath some life into the board...
132 * Initialize an SMC for serial comms, and carry out some hardware
135 * The first part of initialization is running from Flash memory;
136 * its main purpose is to initialize the RAM so that we
137 * can relocate the monitor code to RAM.
141 * All attempts to come up with a "common" initialization sequence
142 * that works for all boards and architectures failed: some of the
143 * requirements are just _too_ different. To get rid of the resulting
144 * mess of board dependend #ifdef'ed code we now make the whole
145 * initialization sequence configurable to the user.
147 * The requirements for any new initalization function is simple: it
148 * receives a pointer to the "global data" structure as it's only
149 * argument, and returns an integer return code, where 0 means
150 * "continue" and != 0 means "fatal error, hang the system".
152 typedef int (init_fnc_t) (void);
154 static int calculate_relocation_address(void);
155 static int copy_uboot_to_ram(void);
156 static int clear_bss(void);
157 static int do_elf_reloc_fixups(void);
159 init_fnc_t *init_sequence_f[] = {
167 calculate_relocation_address,
175 init_fnc_t *init_sequence_r[] = {
176 cpu_init_r, /* basic cpu dependent setup */
177 board_early_init_r, /* basic board dependent setup */
178 dram_init, /* configure available RAM banks */
179 interrupt_init, /* set up exceptions */
189 static int calculate_relocation_address(void)
191 void *text_start = &__text_start;
192 void *bss_end = &__bss_end;
196 /* Calculate destination RAM Address and relocation offset */
197 dest_addr = (void *)gd->ram_size;
198 dest_addr -= CONFIG_SYS_STACK_SIZE;
199 dest_addr -= (bss_end - text_start);
200 rel_offset = dest_addr - text_start;
202 gd->start_addr_sp = gd->ram_size;
203 gd->relocaddr = (ulong)dest_addr;
204 gd->reloc_off = rel_offset;
209 static int copy_uboot_to_ram(void)
211 ulong *dst_addr = (ulong *)gd->relocaddr;
212 ulong *src_addr = (ulong *)&__text_start;
213 ulong *end_addr = (ulong *)&__data_end;
215 while (src_addr < end_addr)
216 *dst_addr++ = *src_addr++;
221 static int clear_bss(void)
223 void *bss_start = &__bss_start;
224 void *bss_end = &__bss_end;
226 ulong *dst_addr = (ulong *)(bss_start + gd->reloc_off);
227 ulong *end_addr = (ulong *)(bss_end + gd->reloc_off);;
229 while (dst_addr < end_addr)
230 *dst_addr++ = 0x00000000;
235 static int do_elf_reloc_fixups(void)
237 Elf32_Rel *re_src = (Elf32_Rel *)(&__rel_dyn_start);
238 Elf32_Rel *re_end = (Elf32_Rel *)(&__rel_dyn_end);
241 if (re_src->r_offset >= CONFIG_SYS_TEXT_BASE)
242 if (*(Elf32_Addr *)(re_src->r_offset + gd->reloc_off) >= CONFIG_SYS_TEXT_BASE)
243 *(Elf32_Addr *)(re_src->r_offset + gd->reloc_off) += gd->reloc_off;
244 } while (re_src++ < re_end);
249 /* Load U-Boot into RAM, initialize BSS, perform relocation adjustments */
250 void board_init_f(ulong boot_flags)
252 init_fnc_t **init_fnc_ptr;
254 gd->flags = boot_flags;
256 for (init_fnc_ptr = init_sequence_f; *init_fnc_ptr; ++init_fnc_ptr) {
257 if ((*init_fnc_ptr)() != 0)
261 gd->flags |= GD_FLG_RELOC;
263 /* Enter the relocated U-Boot! */
264 relocate_code(gd->start_addr_sp, gd, gd->relocaddr);
266 /* NOTREACHED - relocate_code() does not return */
270 void board_init_r(gd_t *id, ulong dest_addr)
276 init_fnc_t **init_fnc_ptr;
278 show_boot_progress(0x21);
280 /* Global data pointer is now writable */
282 memcpy(gd, id, sizeof(gd_t));
284 /* compiler optimization barrier needed for GCC >= 3.4 */
285 __asm__ __volatile__("": : :"memory");
288 memset (gd->bd, 0, sizeof (bd_t));
289 show_boot_progress(0x22);
291 gd->baudrate = CONFIG_BAUDRATE;
293 mem_malloc_init((((ulong)dest_addr - CONFIG_SYS_MALLOC_LEN)+3)&~3,
294 CONFIG_SYS_MALLOC_LEN);
296 for (init_fnc_ptr = init_sequence_r; *init_fnc_ptr; ++init_fnc_ptr) {
297 if ((*init_fnc_ptr)() != 0)
300 show_boot_progress(0x23);
302 #ifdef CONFIG_SERIAL_MULTI
305 /* configure available FLASH banks */
307 display_flash_config(size);
308 show_boot_progress(0x24);
310 show_boot_progress(0x25);
312 /* initialize environment */
314 show_boot_progress(0x26);
317 #ifdef CONFIG_CMD_NET
319 bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
322 #if defined(CONFIG_PCI)
324 * Do pci configuration
329 show_boot_progress(0x27);
336 /* Initialize the console (after the relocation and devices init) */
339 #ifdef CONFIG_MISC_INIT_R
340 /* miscellaneous platform dependent initialisations */
344 #if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
350 #if defined(CONFIG_CMD_KGDB)
356 /* enable exceptions */
358 show_boot_progress(0x28);
360 #ifdef CONFIG_STATUS_LED
361 status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
368 /* Initialize from environment */
369 if ((s = getenv ("loadaddr")) != NULL) {
370 load_addr = simple_strtoul (s, NULL, 16);
372 #if defined(CONFIG_CMD_NET)
373 if ((s = getenv ("bootfile")) != NULL) {
374 copy_filename (BootFile, s, sizeof (BootFile));
380 #if defined(CONFIG_CMD_IDE)
386 #if defined(CONFIG_CMD_SCSI)
392 #if defined(CONFIG_CMD_DOC)
398 #ifdef CONFIG_BITBANGMII
401 #if defined(CONFIG_CMD_NET)
402 #if defined(CONFIG_NET_MULTI)
406 eth_initialize(gd->bd);
409 #if ( defined(CONFIG_CMD_NET)) && (0)
412 puts ("Reset Ethernet PHY\n");
417 #ifdef CONFIG_LAST_STAGE_INIT
420 * Some parts can be only initialized if all others (like
421 * Interrupts) are up and running (i.e. the PC-style ISA
429 post_run (NULL, POST_RAM | post_bootmode_get(0));
433 show_boot_progress(0x29);
435 /* main_loop() can return to retry autoboot, if so just run it again. */
440 /* NOTREACHED - no way out of command loop except booting */
445 puts ("### ERROR ### Please RESET the board ###\n");
449 unsigned long do_go_exec (ulong (*entry)(int, char * const []), int argc, char * const argv[])
451 unsigned long ret = 0;
455 * x86 does not use a dedicated register to pass the pointer to
456 * the global_data, so it is instead passed as argv[-1]. By using
457 * argv[-1], the called 'Application' can use the contents of
458 * argv natively. However, to safely use argv[-1] a new copy of
459 * argv is needed with the extra element
461 argv_tmp = malloc(sizeof(char *) * (argc + 1));
464 argv_tmp[0] = (char *)gd;
466 memcpy(&argv_tmp[1], argv, (size_t)(sizeof(char *) * argc));
468 ret = (entry) (argc, &argv_tmp[1]);
475 void setup_pcat_compatibility(void)
476 __attribute__((weak, alias("__setup_pcat_compatibility")));
478 void __setup_pcat_compatibility(void)