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>
43 #include <asm/u-boot-x86.h>
46 #ifdef CONFIG_BITBANGMII
51 * Pointer to initial global data area
53 * Here we initialize it.
55 #undef XTRN_DECLARE_GLOBAL_DATA_PTR
56 #define XTRN_DECLARE_GLOBAL_DATA_PTR /* empty = allocate here */
57 DECLARE_GLOBAL_DATA_PTR = (gd_t *) (CONFIG_SYS_INIT_GD_ADDR);
60 /* Exports from the Linker Script */
61 extern ulong __text_start;
62 extern ulong __data_end;
63 extern ulong __rel_dyn_start;
64 extern ulong __rel_dyn_end;
65 extern ulong __bss_start;
66 extern ulong __bss_end;
68 /************************************************************************
70 ************************************************************************
71 * Some of this code should be moved into the core functions,
72 * or dropped completely,
73 * but let's get it working (again) first...
75 static int init_baudrate (void)
77 char tmp[64]; /* long enough for environment variables */
78 int i = getenv_f("baudrate", tmp, 64);
80 gd->baudrate = (i != 0)
81 ? (int) simple_strtoul (tmp, NULL, 10)
87 static int display_banner (void)
90 printf ("\n\n%s\n\n", version_string);
92 printf ("U-Boot code: %08lX -> %08lX data: %08lX -> %08lX\n"
93 " BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
94 i386boot_start, i386boot_romdata_start-1,
95 i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
96 i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
97 i386boot_bss_start+i386boot_bss_size,
98 i386boot_bss_start+i386boot_bss_size+CONFIG_SYS_STACK_SIZE-1);
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.
137 * All attempts to come up with a "common" initialization sequence
138 * that works for all boards and architectures failed: some of the
139 * requirements are just _too_ different. To get rid of the resulting
140 * mess of board dependend #ifdef'ed code we now make the whole
141 * initialization sequence configurable to the user.
143 * The requirements for any new initalization function is simple: it
144 * receives a pointer to the "global data" structure as it's only
145 * argument, and returns an integer return code, where 0 means
146 * "continue" and != 0 means "fatal error, hang the system".
148 typedef int (init_fnc_t) (void);
150 static int calculate_relocation_address(void);
151 static int copy_uboot_to_ram(void);
152 static int clear_bss(void);
153 static int do_elf_reloc_fixups(void);
155 init_fnc_t *init_sequence_f[] = {
163 calculate_relocation_address,
171 init_fnc_t *init_sequence_r[] = {
172 cpu_init_r, /* basic cpu dependent setup */
173 board_early_init_r, /* basic board dependent setup */
174 dram_init, /* configure available RAM banks */
175 interrupt_init, /* set up exceptions */
185 static int calculate_relocation_address(void)
187 void *text_start = &__text_start;
188 void *bss_end = &__bss_end;
192 /* Calculate destination RAM Address and relocation offset */
193 dest_addr = (void *)gd->ram_size;
194 dest_addr -= CONFIG_SYS_STACK_SIZE;
195 dest_addr -= (bss_end - text_start);
196 rel_offset = dest_addr - text_start;
198 gd->start_addr_sp = gd->ram_size;
199 gd->relocaddr = (ulong)dest_addr;
200 gd->reloc_off = rel_offset;
205 static int copy_uboot_to_ram(void)
207 ulong *dst_addr = (ulong *)gd->relocaddr;
208 ulong *src_addr = (ulong *)&__text_start;
209 ulong *end_addr = (ulong *)&__data_end;
211 while (src_addr < end_addr)
212 *dst_addr++ = *src_addr++;
217 static int clear_bss(void)
219 void *bss_start = &__bss_start;
220 void *bss_end = &__bss_end;
222 ulong *dst_addr = (ulong *)(bss_start + gd->reloc_off);
223 ulong *end_addr = (ulong *)(bss_end + gd->reloc_off);;
225 while (dst_addr < end_addr)
226 *dst_addr++ = 0x00000000;
231 static int do_elf_reloc_fixups(void)
233 Elf32_Rel *re_src = (Elf32_Rel *)(&__rel_dyn_start);
234 Elf32_Rel *re_end = (Elf32_Rel *)(&__rel_dyn_end);
237 if (re_src->r_offset >= CONFIG_SYS_TEXT_BASE)
238 if (*(Elf32_Addr *)(re_src->r_offset + gd->reloc_off) >= CONFIG_SYS_TEXT_BASE)
239 *(Elf32_Addr *)(re_src->r_offset + gd->reloc_off) += gd->reloc_off;
240 } while (re_src++ < re_end);
245 /* Load U-Boot into RAM, initialize BSS, perform relocation adjustments */
246 void board_init_f(ulong boot_flags)
248 init_fnc_t **init_fnc_ptr;
250 gd->flags = boot_flags;
252 for (init_fnc_ptr = init_sequence_f; *init_fnc_ptr; ++init_fnc_ptr) {
253 if ((*init_fnc_ptr)() != 0)
257 gd->flags |= GD_FLG_RELOC;
259 /* Enter the relocated U-Boot! */
260 relocate_code(gd->start_addr_sp, gd, gd->relocaddr);
262 /* NOTREACHED - relocate_code() does not return */
266 void board_init_r(gd_t *id, ulong dest_addr)
272 init_fnc_t **init_fnc_ptr;
274 show_boot_progress(0x21);
276 /* Global data pointer is now writable */
278 memcpy(gd, id, sizeof(gd_t));
280 /* compiler optimization barrier needed for GCC >= 3.4 */
281 __asm__ __volatile__("": : :"memory");
284 memset (gd->bd, 0, sizeof (bd_t));
285 show_boot_progress(0x22);
287 gd->baudrate = CONFIG_BAUDRATE;
289 mem_malloc_init((((ulong)dest_addr - CONFIG_SYS_MALLOC_LEN)+3)&~3,
290 CONFIG_SYS_MALLOC_LEN);
292 for (init_fnc_ptr = init_sequence_r; *init_fnc_ptr; ++init_fnc_ptr) {
293 if ((*init_fnc_ptr)() != 0)
296 show_boot_progress(0x23);
298 #ifdef CONFIG_SERIAL_MULTI
301 /* configure available FLASH banks */
303 display_flash_config(size);
304 show_boot_progress(0x24);
306 show_boot_progress(0x25);
308 /* initialize environment */
310 show_boot_progress(0x26);
313 #ifdef CONFIG_CMD_NET
315 bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
318 #if defined(CONFIG_PCI)
320 * Do pci configuration
325 show_boot_progress(0x27);
332 /* Initialize the console (after the relocation and devices init) */
335 #ifdef CONFIG_MISC_INIT_R
336 /* miscellaneous platform dependent initialisations */
340 #if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
346 #if defined(CONFIG_CMD_KGDB)
352 /* enable exceptions */
354 show_boot_progress(0x28);
356 #ifdef CONFIG_STATUS_LED
357 status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
362 /* Initialize from environment */
363 if ((s = getenv ("loadaddr")) != NULL) {
364 load_addr = simple_strtoul (s, NULL, 16);
366 #if defined(CONFIG_CMD_NET)
367 if ((s = getenv ("bootfile")) != NULL) {
368 copy_filename (BootFile, s, sizeof (BootFile));
374 #if defined(CONFIG_CMD_IDE)
380 #if defined(CONFIG_CMD_SCSI)
386 #if defined(CONFIG_CMD_DOC)
392 #ifdef CONFIG_BITBANGMII
395 #if defined(CONFIG_CMD_NET)
396 #if defined(CONFIG_NET_MULTI)
400 eth_initialize(gd->bd);
403 #if ( defined(CONFIG_CMD_NET)) && (0)
406 puts ("Reset Ethernet PHY\n");
411 #ifdef CONFIG_LAST_STAGE_INIT
414 * Some parts can be only initialized if all others (like
415 * Interrupts) are up and running (i.e. the PC-style ISA
423 post_run (NULL, POST_RAM | post_bootmode_get(0));
427 show_boot_progress(0x29);
429 /* main_loop() can return to retry autoboot, if so just run it again. */
434 /* NOTREACHED - no way out of command loop except booting */
439 puts ("### ERROR ### Please RESET the board ###\n");
443 unsigned long do_go_exec (ulong (*entry)(int, char * const []), int argc, char * const argv[])
445 unsigned long ret = 0;
449 * x86 does not use a dedicated register to pass the pointer to
450 * the global_data, so it is instead passed as argv[-1]. By using
451 * argv[-1], the called 'Application' can use the contents of
452 * argv natively. However, to safely use argv[-1] a new copy of
453 * argv is needed with the extra element
455 argv_tmp = malloc(sizeof(char *) * (argc + 1));
458 argv_tmp[0] = (char *)gd;
460 memcpy(&argv_tmp[1], argv, (size_t)(sizeof(char *) * argc));
462 ret = (entry) (argc, &argv_tmp[1]);
469 void setup_pcat_compatibility(void)
470 __attribute__((weak, alias("__setup_pcat_compatibility")));
472 void __setup_pcat_compatibility(void)