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");
272 i
= getenv_r ("ethaddr", tmp
, sizeof (tmp
));
273 s
= (i
> 0) ? tmp
: NULL
;
275 for (reg
= 0; reg
< 6; ++reg
) {
276 bd_data
.bi_enetaddr
[reg
] = s
? simple_strtoul (s
, &e
, 16) : 0;
278 s
= (*e
) ? e
+ 1 : e
;
282 #if defined(CONFIG_PCI)
284 * Do pci configuration
289 show_boot_progress(0x27);
296 /* Initialize the console (after the relocation and devices init) */
299 #ifdef CONFIG_MISC_INIT_R
300 /* miscellaneous platform dependent initialisations */
304 #if defined(CONFIG_CMD_PCMCIA) && !defined(CONFIG_CMD_IDE)
310 #if defined(CONFIG_CMD_KGDB)
316 /* enable exceptions */
318 show_boot_progress(0x28);
320 /* Must happen after interrupts are initialized since
321 * an irq handler gets installed
323 #ifdef CONFIG_SERIAL_SOFTWARE_FIFO
324 serial_buffered_init();
327 #ifdef CONFIG_STATUS_LED
328 status_led_set (STATUS_LED_BOOT
, STATUS_LED_BLINKING
);
335 /* Initialize from environment */
336 if ((s
= getenv ("loadaddr")) != NULL
) {
337 load_addr
= simple_strtoul (s
, NULL
, 16);
339 #if defined(CONFIG_CMD_NET)
340 if ((s
= getenv ("bootfile")) != NULL
) {
341 copy_filename (BootFile
, s
, sizeof (BootFile
));
347 #if defined(CONFIG_CMD_IDE)
353 #if defined(CONFIG_CMD_SCSI)
359 #if defined(CONFIG_CMD_DOC)
365 #if defined(CONFIG_CMD_NET)
366 #if defined(CONFIG_NET_MULTI)
370 eth_initialize(gd
->bd
);
373 #if ( defined(CONFIG_CMD_NET)) && (0)
376 puts ("Reset Ethernet PHY\n");
381 #ifdef CONFIG_LAST_STAGE_INIT
384 * Some parts can be only initialized if all others (like
385 * Interrupts) are up and running (i.e. the PC-style ISA
393 post_run (NULL
, POST_RAM
| post_bootmode_get(0));
397 show_boot_progress(0x29);
399 /* main_loop() can return to retry autoboot, if so just run it again. */
404 /* NOTREACHED - no way out of command loop except booting */
409 puts ("### ERROR ### Please RESET the board ###\n");
413 unsigned long do_go_exec (ulong (*entry
)(int, char *[]), int argc
, char *argv
[])
416 * TODO: Test this function - changed to fix compiler error.
418 * return (entry >> 1) (argc, argv);
419 * with a comment about Nios function pointers are address >> 1
421 return (entry
) (argc
, argv
);