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>
40 #include <asm/u-boot-i386.h>
42 #ifdef CONFIG_BITBANGMII
46 DECLARE_GLOBAL_DATA_PTR;
48 extern long _i386boot_start;
49 extern long _i386boot_end;
50 extern long _i386boot_romdata_start;
51 extern long _i386boot_romdata_dest;
52 extern long _i386boot_romdata_size;
53 extern long _i386boot_bss_start;
54 extern long _i386boot_bss_size;
56 /* The symbols defined by the linker script becomes pointers
57 * which is somewhat inconveient ... */
58 ulong i386boot_start = (ulong)&_i386boot_start; /* code start (in flash) defined in start.S */
59 ulong i386boot_end = (ulong)&_i386boot_end; /* code end (in flash) */
60 ulong i386boot_romdata_start = (ulong)&_i386boot_romdata_start; /* datasegment in flash (also code+rodata end) */
61 ulong i386boot_romdata_dest = (ulong)&_i386boot_romdata_dest; /* data location segment in ram */
62 ulong i386boot_romdata_size = (ulong)&_i386boot_romdata_size; /* size of data segment */
63 ulong i386boot_bss_start = (ulong)&_i386boot_bss_start; /* bss start */
64 ulong i386boot_bss_size = (ulong)&_i386boot_bss_size; /* bss size */
66 const char version_string[] =
67 U_BOOT_VERSION" (" U_BOOT_DATE " - " U_BOOT_TIME ")";
69 static int heap_init(void)
71 /* start malloc area right after the stack */
72 ulong start = i386boot_bss_start + i386boot_bss_size +
73 CONFIG_SYS_STACK_SIZE;
78 mem_malloc_init(start, CONFIG_SYS_MALLOC_LEN);
83 /************************************************************************
85 ************************************************************************
86 * Some of this code should be moved into the core functions,
87 * or dropped completely,
88 * but let's get it working (again) first...
90 static int init_baudrate (void)
92 char tmp[64]; /* long enough for environment variables */
93 int i = getenv_r("baudrate", tmp, 64);
95 gd->baudrate = (i != 0)
96 ? (int) simple_strtoul (tmp, NULL, 10)
102 static int display_banner (void)
105 printf ("\n\n%s\n\n", version_string);
106 printf ("U-Boot code: %08lX -> %08lX data: %08lX -> %08lX\n"
107 " BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
108 i386boot_start, i386boot_romdata_start-1,
109 i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
110 i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
111 i386boot_bss_start+i386boot_bss_size,
112 i386boot_bss_start+i386boot_bss_size+CONFIG_SYS_STACK_SIZE-1);
119 * WARNING: this code looks "cleaner" than the PowerPC version, but
120 * has the disadvantage that you either get nothing, or everything.
121 * On PowerPC, you might see "DRAM: " before the system hangs - which
122 * gives a simple yet clear indication which part of the
123 * initialization if failing.
125 static int display_dram_config (void)
129 puts ("DRAM Configuration:\n");
131 for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
132 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
133 print_size (gd->bd->bi_dram[i].size, "\n");
139 static void display_flash_config (ulong size)
142 print_size (size, "\n");
147 * Breath some life into the board...
149 * Initialize an SMC for serial comms, and carry out some hardware
152 * The first part of initialization is running from Flash memory;
153 * its main purpose is to initialize the RAM so that we
154 * can relocate the monitor code to RAM.
158 * All attempts to come up with a "common" initialization sequence
159 * that works for all boards and architectures failed: some of the
160 * requirements are just _too_ different. To get rid of the resulting
161 * mess of board dependend #ifdef'ed code we now make the whole
162 * initialization sequence configurable to the user.
164 * The requirements for any new initalization function is simple: it
165 * receives a pointer to the "global data" structure as it's only
166 * argument, and returns an integer return code, where 0 means
167 * "continue" and != 0 means "fatal error, hang the system".
169 typedef int (init_fnc_t) (void);
171 init_fnc_t *init_sequence[] = {
172 cpu_init, /* basic cpu dependent setup */
173 board_init, /* basic board dependent setup */
174 dram_init, /* configure available RAM banks */
175 heap_init, /* dependant on dram_init */
176 interrupt_init, /* set up exceptions */
179 env_init, /* initialize environment */
180 init_baudrate, /* initialze baudrate settings */
181 serial_init, /* serial communications setup */
190 void start_i386boot (void)
197 init_fnc_t **init_fnc_ptr;
199 #ifndef CONFIG_SKIP_RELOCATE_UBOOT
202 show_boot_progress(0x21);
205 /* compiler optimization barrier needed for GCC >= 3.4 */
206 __asm__ __volatile__("": : :"memory");
208 memset (gd, 0, sizeof (gd_t));
210 memset (gd->bd, 0, sizeof (bd_t));
211 show_boot_progress(0x22);
213 gd->baudrate = CONFIG_BAUDRATE;
215 #ifndef CONFIG_SKIP_RELOCATE_UBOOT
216 /* Need to set relocation offset here for interrupt initialization */
217 gd->reloc_off = CONFIG_SYS_BL_START_RAM - TEXT_BASE;
219 for (init_fnc_ptr = init_sequence, i=0; *init_fnc_ptr; ++init_fnc_ptr, i++) {
220 show_boot_progress(0xa130|i);
222 if ((*init_fnc_ptr)() != 0) {
226 show_boot_progress(0x23);
228 #ifndef CONFIG_SKIP_RELOCATE_UBOOT
229 for (p = &__u_boot_cmd_start; p != &__u_boot_cmd_end; p++) {
231 addr = (ulong) (p->cmd) + gd->reloc_off;
232 p->cmd = (int (*)(struct cmd_tbl_s *, int, int, char *[]))addr;
233 addr = (ulong)(p->name) + gd->reloc_off;
234 p->name = (char *)addr;
236 if (p->usage != NULL) {
237 addr = (ulong)(p->usage) + gd->reloc_off;
238 p->usage = (char *)addr;
240 #ifdef CONFIG_SYS_LONGHELP
241 if (p->help != NULL) {
242 addr = (ulong)(p->help) + gd->reloc_off;
243 p->help = (char *)addr;
248 /* configure available FLASH banks */
250 display_flash_config(size);
251 show_boot_progress(0x24);
253 show_boot_progress(0x25);
255 /* initialize environment */
257 show_boot_progress(0x26);
261 bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
263 #if defined(CONFIG_PCI)
265 * Do pci configuration
270 show_boot_progress(0x27);
277 /* Initialize the console (after the relocation and devices init) */
280 #ifdef CONFIG_MISC_INIT_R
281 /* miscellaneous platform dependent initialisations */
285 #if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
291 #if defined(CONFIG_CMD_KGDB)
297 /* enable exceptions */
299 show_boot_progress(0x28);
301 /* Must happen after interrupts are initialized since
302 * an irq handler gets installed
304 #ifdef CONFIG_SERIAL_SOFTWARE_FIFO
305 serial_buffered_init();
308 #ifdef CONFIG_STATUS_LED
309 status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
316 /* Initialize from environment */
317 if ((s = getenv ("loadaddr")) != NULL) {
318 load_addr = simple_strtoul (s, NULL, 16);
320 #if defined(CONFIG_CMD_NET)
321 if ((s = getenv ("bootfile")) != NULL) {
322 copy_filename (BootFile, s, sizeof (BootFile));
328 #if defined(CONFIG_CMD_IDE)
334 #if defined(CONFIG_CMD_SCSI)
340 #if defined(CONFIG_CMD_DOC)
346 #ifdef CONFIG_BITBANGMII
349 #if defined(CONFIG_CMD_NET)
350 #if defined(CONFIG_NET_MULTI)
354 eth_initialize(gd->bd);
357 #if ( defined(CONFIG_CMD_NET)) && (0)
360 puts ("Reset Ethernet PHY\n");
365 #ifdef CONFIG_LAST_STAGE_INIT
368 * Some parts can be only initialized if all others (like
369 * Interrupts) are up and running (i.e. the PC-style ISA
377 post_run (NULL, POST_RAM | post_bootmode_get(0));
381 show_boot_progress(0x29);
383 /* main_loop() can return to retry autoboot, if so just run it again. */
388 /* NOTREACHED - no way out of command loop except booting */
393 puts ("### ERROR ### Please RESET the board ###\n");
397 unsigned long do_go_exec (ulong (*entry)(int, char *[]), int argc, char *argv[])
400 * TODO: Test this function - changed to fix compiler error.
402 * return (entry >> 1) (argc, argv);
403 * with a comment about Nios function pointers are address >> 1
405 return (entry) (argc, argv);