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,
35 #include <timestamp.h>
40 #include <asm/u-boot-i386.h>
42 DECLARE_GLOBAL_DATA_PTR;
44 extern long _i386boot_start;
45 extern long _i386boot_end;
46 extern long _i386boot_romdata_start;
47 extern long _i386boot_romdata_dest;
48 extern long _i386boot_romdata_size;
49 extern long _i386boot_bss_start;
50 extern long _i386boot_bss_size;
52 extern long _i386boot_realmode;
53 extern long _i386boot_realmode_size;
54 extern long _i386boot_bios;
55 extern long _i386boot_bios_size;
57 /* The symbols defined by the linker script becomes pointers
58 * which is somewhat inconveient ... */
59 ulong i386boot_start = (ulong)&_i386boot_start; /* code start (in flash) defined in start.S */
60 ulong i386boot_end = (ulong)&_i386boot_end; /* code end (in flash) */
61 ulong i386boot_romdata_start = (ulong)&_i386boot_romdata_start; /* datasegment in flash (also code+rodata end) */
62 ulong i386boot_romdata_dest = (ulong)&_i386boot_romdata_dest; /* data location segment in ram */
63 ulong i386boot_romdata_size = (ulong)&_i386boot_romdata_size; /* size of data segment */
64 ulong i386boot_bss_start = (ulong)&_i386boot_bss_start; /* bss start */
65 ulong i386boot_bss_size = (ulong)&_i386boot_bss_size; /* bss size */
67 ulong i386boot_realmode = (ulong)&_i386boot_realmode; /* start of realmode entry code */
68 ulong i386boot_realmode_size = (ulong)&_i386boot_realmode_size; /* size of realmode entry code */
69 ulong i386boot_bios = (ulong)&_i386boot_bios; /* start of BIOS emulation code */
70 ulong i386boot_bios_size = (ulong)&_i386boot_bios_size; /* size of BIOS emulation code */
73 const char version_string[] =
74 U_BOOT_VERSION" (" U_BOOT_DATE " - " U_BOOT_TIME ")";
78 * Begin and End of memory area for malloc(), and current "brk"
80 static ulong mem_malloc_start = 0;
81 static ulong mem_malloc_end = 0;
82 static ulong mem_malloc_brk = 0;
84 static int mem_malloc_init(void)
86 /* start malloc area right after the stack */
87 mem_malloc_start = i386boot_bss_start +
88 i386boot_bss_size + CONFIG_SYS_STACK_SIZE;
89 mem_malloc_start = (mem_malloc_start+3)&~3;
91 /* Use all available RAM for malloc() */
92 mem_malloc_end = gd->ram_size;
94 mem_malloc_brk = mem_malloc_start;
99 void *sbrk (ptrdiff_t increment)
101 ulong old = mem_malloc_brk;
102 ulong new = old + increment;
104 if ((new < mem_malloc_start) || (new > mem_malloc_end)) {
107 mem_malloc_brk = new;
109 return ((void *) old);
112 /************************************************************************
114 ************************************************************************
115 * Some of this code should be moved into the core functions,
116 * or dropped completely,
117 * but let's get it working (again) first...
119 static int init_baudrate (void)
121 char tmp[64]; /* long enough for environment variables */
122 int i = getenv_r("baudrate", tmp, 64);
124 gd->baudrate = (i != 0)
125 ? (int) simple_strtoul (tmp, NULL, 10)
131 static int display_banner (void)
134 printf ("\n\n%s\n\n", version_string);
135 printf ("U-Boot code: %08lX -> %08lX data: %08lX -> %08lX\n"
136 " BSS: %08lX -> %08lX stack: %08lX -> %08lX\n",
137 i386boot_start, i386boot_romdata_start-1,
138 i386boot_romdata_dest, i386boot_romdata_dest+i386boot_romdata_size-1,
139 i386boot_bss_start, i386boot_bss_start+i386boot_bss_size-1,
140 i386boot_bss_start+i386boot_bss_size,
141 i386boot_bss_start+i386boot_bss_size+CONFIG_SYS_STACK_SIZE-1);
148 * WARNING: this code looks "cleaner" than the PowerPC version, but
149 * has the disadvantage that you either get nothing, or everything.
150 * On PowerPC, you might see "DRAM: " before the system hangs - which
151 * gives a simple yet clear indication which part of the
152 * initialization if failing.
154 static int display_dram_config (void)
158 puts ("DRAM Configuration:\n");
160 for (i=0; i<CONFIG_NR_DRAM_BANKS; i++) {
161 printf ("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start);
162 print_size (gd->bd->bi_dram[i].size, "\n");
168 static void display_flash_config (ulong size)
171 print_size (size, "\n");
176 * Breath some life into the board...
178 * Initialize an SMC for serial comms, and carry out some hardware
181 * The first part of initialization is running from Flash memory;
182 * its main purpose is to initialize the RAM so that we
183 * can relocate the monitor code to RAM.
187 * All attempts to come up with a "common" initialization sequence
188 * that works for all boards and architectures failed: some of the
189 * requirements are just _too_ different. To get rid of the resulting
190 * mess of board dependend #ifdef'ed code we now make the whole
191 * initialization sequence configurable to the user.
193 * The requirements for any new initalization function is simple: it
194 * receives a pointer to the "global data" structure as it's only
195 * argument, and returns an integer return code, where 0 means
196 * "continue" and != 0 means "fatal error, hang the system".
198 typedef int (init_fnc_t) (void);
200 init_fnc_t *init_sequence[] = {
201 cpu_init, /* basic cpu dependent setup */
202 board_init, /* basic board dependent setup */
203 dram_init, /* configure available RAM banks */
204 mem_malloc_init, /* dependant on dram_init */
205 interrupt_init, /* set up exceptions */
208 env_init, /* initialize environment */
209 init_baudrate, /* initialze baudrate settings */
210 serial_init, /* serial communications setup */
219 void start_i386boot (void)
226 init_fnc_t **init_fnc_ptr;
228 show_boot_progress(0x21);
231 /* compiler optimization barrier needed for GCC >= 3.4 */
232 __asm__ __volatile__("": : :"memory");
234 memset (gd, 0, sizeof (gd_t));
236 memset (gd->bd, 0, sizeof (bd_t));
237 show_boot_progress(0x22);
239 gd->baudrate = CONFIG_BAUDRATE;
241 for (init_fnc_ptr = init_sequence, i=0; *init_fnc_ptr; ++init_fnc_ptr, i++) {
242 show_boot_progress(0xa130|i);
244 if ((*init_fnc_ptr)() != 0) {
248 show_boot_progress(0x23);
250 /* configure available FLASH banks */
252 display_flash_config(size);
253 show_boot_progress(0x24);
255 show_boot_progress(0x25);
257 /* initialize environment */
259 show_boot_progress(0x26);
263 bd_data.bi_ip_addr = getenv_IPaddr ("ipaddr");
265 #if defined(CONFIG_PCI)
267 * Do pci configuration
272 show_boot_progress(0x27);
279 /* Initialize the console (after the relocation and devices init) */
282 #ifdef CONFIG_MISC_INIT_R
283 /* miscellaneous platform dependent initialisations */
287 #if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
293 #if defined(CONFIG_CMD_KGDB)
299 /* enable exceptions */
301 show_boot_progress(0x28);
303 /* Must happen after interrupts are initialized since
304 * an irq handler gets installed
306 #ifdef CONFIG_SERIAL_SOFTWARE_FIFO
307 serial_buffered_init();
310 #ifdef CONFIG_STATUS_LED
311 status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
318 /* Initialize from environment */
319 if ((s = getenv ("loadaddr")) != NULL) {
320 load_addr = simple_strtoul (s, NULL, 16);
322 #if defined(CONFIG_CMD_NET)
323 if ((s = getenv ("bootfile")) != NULL) {
324 copy_filename (BootFile, s, sizeof (BootFile));
330 #if defined(CONFIG_CMD_IDE)
336 #if defined(CONFIG_CMD_SCSI)
342 #if defined(CONFIG_CMD_DOC)
348 #if defined(CONFIG_CMD_NET)
349 #if defined(CONFIG_NET_MULTI)
353 eth_initialize(gd->bd);
356 #if ( defined(CONFIG_CMD_NET)) && (0)
359 puts ("Reset Ethernet PHY\n");
364 #ifdef CONFIG_LAST_STAGE_INIT
367 * Some parts can be only initialized if all others (like
368 * Interrupts) are up and running (i.e. the PC-style ISA
376 post_run (NULL, POST_RAM | post_bootmode_get(0));
380 show_boot_progress(0x29);
382 /* main_loop() can return to retry autoboot, if so just run it again. */
387 /* NOTREACHED - no way out of command loop except booting */
392 puts ("### ERROR ### Please RESET the board ###\n");
396 unsigned long do_go_exec (ulong (*entry)(int, char *[]), int argc, char *argv[])
399 * TODO: Test this function - changed to fix compiler error.
401 * return (entry >> 1) (argc, argv);
402 * with a comment about Nios function pointers are address >> 1
404 return (entry) (argc, argv);