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 extern long _i386boot_realmode;
57 extern long _i386boot_realmode_size;
58 extern long _i386boot_bios;
59 extern long _i386boot_bios_size;
61 /* The symbols defined by the linker script becomes pointers
62 * which is somewhat inconveient ... */
63 ulong i386boot_start = (ulong)&_i386boot_start; /* code start (in flash) defined in start.S */
64 ulong i386boot_end = (ulong)&_i386boot_end; /* code end (in flash) */
65 ulong i386boot_romdata_start = (ulong)&_i386boot_romdata_start; /* datasegment in flash (also code+rodata end) */
66 ulong i386boot_romdata_dest = (ulong)&_i386boot_romdata_dest; /* data location segment in ram */
67 ulong i386boot_romdata_size = (ulong)&_i386boot_romdata_size; /* size of data segment */
68 ulong i386boot_bss_start = (ulong)&_i386boot_bss_start; /* bss start */
69 ulong i386boot_bss_size = (ulong)&_i386boot_bss_size; /* bss size */
71 ulong i386boot_realmode = (ulong)&_i386boot_realmode; /* start of realmode entry code */
72 ulong i386boot_realmode_size = (ulong)&_i386boot_realmode_size; /* size of realmode entry code */
73 ulong i386boot_bios = (ulong)&_i386boot_bios; /* start of BIOS emulation code */
74 ulong i386boot_bios_size = (ulong)&_i386boot_bios_size; /* size of BIOS emulation code */
77 const char version_string[] =
78 U_BOOT_VERSION" (" U_BOOT_DATE " - " U_BOOT_TIME ")";
80 static int mem_malloc_init(void)
82 /* start malloc area right after the stack */
83 mem_malloc_start = i386boot_bss_start +
84 i386boot_bss_size + CONFIG_SYS_STACK_SIZE;
85 mem_malloc_start = (mem_malloc_start+3)&~3;
87 /* Use all available RAM for malloc() */
88 mem_malloc_end = gd->ram_size;
90 mem_malloc_brk = mem_malloc_start;
95 /************************************************************************
97 ************************************************************************
98 * Some of this code should be moved into the core functions,
99 * or dropped completely,
100 * but let's get it working (again) first...
102 static int init_baudrate (void)
104 char tmp[64]; /* long enough for environment variables */
105 int i = getenv_r("baudrate", tmp, 64);
107 gd->baudrate = (i != 0)
108 ? (int) simple_strtoul (tmp, NULL, 10)
114 static int display_banner (void)
117 printf ("\n\n%s\n\n", version_string);
118 printf ("U-Boot code: %08lX -> %08lX data: %08lX -> %08lX\n"
119 " BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
120 i386boot_start, i386boot_romdata_start-1,
121 i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
122 i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
123 i386boot_bss_start+i386boot_bss_size,
124 i386boot_bss_start+i386boot_bss_size+CONFIG_SYS_STACK_SIZE-1);
131 * WARNING: this code looks "cleaner" than the PowerPC version, but
132 * has the disadvantage that you either get nothing, or everything.
133 * On PowerPC, you might see "DRAM: " before the system hangs - which
134 * gives a simple yet clear indication which part of the
135 * initialization if failing.
137 static int display_dram_config (void)
141 puts ("DRAM Configuration:\n");
143 for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
144 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
145 print_size (gd->bd->bi_dram[i].size, "\n");
151 static void display_flash_config (ulong size)
154 print_size (size, "\n");
159 * Breath some life into the board...
161 * Initialize an SMC for serial comms, and carry out some hardware
164 * The first part of initialization is running from Flash memory;
165 * its main purpose is to initialize the RAM so that we
166 * can relocate the monitor code to RAM.
170 * All attempts to come up with a "common" initialization sequence
171 * that works for all boards and architectures failed: some of the
172 * requirements are just _too_ different. To get rid of the resulting
173 * mess of board dependend #ifdef'ed code we now make the whole
174 * initialization sequence configurable to the user.
176 * The requirements for any new initalization function is simple: it
177 * receives a pointer to the "global data" structure as it's only
178 * argument, and returns an integer return code, where 0 means
179 * "continue" and != 0 means "fatal error, hang the system".
181 typedef int (init_fnc_t) (void);
183 init_fnc_t *init_sequence[] = {
184 cpu_init, /* basic cpu dependent setup */
185 board_init, /* basic board dependent setup */
186 dram_init, /* configure available RAM banks */
187 mem_malloc_init, /* dependant on dram_init */
188 interrupt_init, /* set up exceptions */
191 env_init, /* initialize environment */
192 init_baudrate, /* initialze baudrate settings */
193 serial_init, /* serial communications setup */
202 void start_i386boot (void)
209 init_fnc_t **init_fnc_ptr;
211 #ifndef CONFIG_SKIP_RELOCATE_UBOOT
214 show_boot_progress(0x21);
217 /* compiler optimization barrier needed for GCC >= 3.4 */
218 __asm__ __volatile__("": : :"memory");
220 memset (gd, 0, sizeof (gd_t));
222 memset (gd->bd, 0, sizeof (bd_t));
223 show_boot_progress(0x22);
225 gd->baudrate = CONFIG_BAUDRATE;
227 #ifndef CONFIG_SKIP_RELOCATE_UBOOT
228 /* Need to set relocation offset here for interrupt initialization */
229 gd->reloc_off = CONFIG_SYS_BL_START_RAM - TEXT_BASE;
231 for (init_fnc_ptr = init_sequence, i=0; *init_fnc_ptr; ++init_fnc_ptr, i++) {
232 show_boot_progress(0xa130|i);
234 if ((*init_fnc_ptr)() != 0) {
238 show_boot_progress(0x23);
240 #ifndef CONFIG_SKIP_RELOCATE_UBOOT
241 for (p = &__u_boot_cmd_start; p != &__u_boot_cmd_end; p++) {
243 addr = (ulong) (p->cmd) + gd->reloc_off;
244 p->cmd = (int (*)(struct cmd_tbl_s *, int, int, char *[]))addr;
245 addr = (ulong)(p->name) + gd->reloc_off;
246 p->name = (char *)addr;
248 if (p->usage != NULL) {
249 addr = (ulong)(p->usage) + gd->reloc_off;
250 p->usage = (char *)addr;
252 #ifdef CONFIG_SYS_LONGHELP
253 if (p->help != NULL) {
254 addr = (ulong)(p->help) + gd->reloc_off;
255 p->help = (char *)addr;
260 /* configure available FLASH banks */
262 display_flash_config(size);
263 show_boot_progress(0x24);
265 show_boot_progress(0x25);
267 /* initialize environment */
269 show_boot_progress(0x26);
273 bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
275 #if defined(CONFIG_PCI)
277 * Do pci configuration
282 show_boot_progress(0x27);
289 /* Initialize the console (after the relocation and devices init) */
292 #ifdef CONFIG_MISC_INIT_R
293 /* miscellaneous platform dependent initialisations */
297 #if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
303 #if defined(CONFIG_CMD_KGDB)
309 /* enable exceptions */
311 show_boot_progress(0x28);
313 /* Must happen after interrupts are initialized since
314 * an irq handler gets installed
316 #ifdef CONFIG_SERIAL_SOFTWARE_FIFO
317 serial_buffered_init();
320 #ifdef CONFIG_STATUS_LED
321 status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
328 /* Initialize from environment */
329 if ((s = getenv ("loadaddr")) != NULL) {
330 load_addr = simple_strtoul (s, NULL, 16);
332 #if defined(CONFIG_CMD_NET)
333 if ((s = getenv ("bootfile")) != NULL) {
334 copy_filename (BootFile, s, sizeof (BootFile));
340 #if defined(CONFIG_CMD_IDE)
346 #if defined(CONFIG_CMD_SCSI)
352 #if defined(CONFIG_CMD_DOC)
358 #ifdef CONFIG_BITBANGMII
361 #if defined(CONFIG_CMD_NET)
362 #if defined(CONFIG_NET_MULTI)
366 eth_initialize(gd->bd);
369 #if ( defined(CONFIG_CMD_NET)) && (0)
372 puts ("Reset Ethernet PHY\n");
377 #ifdef CONFIG_LAST_STAGE_INIT
380 * Some parts can be only initialized if all others (like
381 * Interrupts) are up and running (i.e. the PC-style ISA
389 post_run (NULL, POST_RAM | post_bootmode_get(0));
393 show_boot_progress(0x29);
395 /* main_loop() can return to retry autoboot, if so just run it again. */
400 /* NOTREACHED - no way out of command loop except booting */
405 puts ("### ERROR ### Please RESET the board ###\n");
409 unsigned long do_go_exec (ulong (*entry)(int, char *[]), int argc, char *argv[])
412 * TODO: Test this function - changed to fix compiler error.
414 * return (entry >> 1) (argc, argv);
415 * with a comment about Nios function pointers are address >> 1
417 return (entry) (argc, argv);