]>
git.ipfire.org Git - people/ms/u-boot.git/blob - lib_m68k/board.c
3 * Josef Baumgartner <josef.baumgartner@telex.de>
5 * (C) Copyright 2000-2002
6 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
8 * See file CREDITS for list of people who contributed to this
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation; either version 2 of
14 * the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
34 #include <asm/immap_5272.h>
37 #if (CONFIG_COMMANDS & CFG_CMD_IDE)
40 #if (CONFIG_COMMANDS & CFG_CMD_SCSI)
43 #if (CONFIG_COMMANDS & CFG_CMD_KGDB)
46 #ifdef CONFIG_STATUS_LED
47 #include <status_led.h>
50 #if (CONFIG_COMMANDS & CFG_CMD_BEDBUG)
51 #include <cmd_bedbug.h>
53 #ifdef CFG_ALLOC_DPRAM
58 #if defined(CONFIG_HARD_I2C) || \
59 defined(CONFIG_SOFT_I2C)
63 DECLARE_GLOBAL_DATA_PTR
;
65 static char *failed
= "*** failed ***\n";
68 extern flash_info_t flash_info
[];
71 #include <environment.h>
73 #if ( ((CFG_ENV_ADDR+CFG_ENV_SIZE) < CFG_MONITOR_BASE) || \
74 (CFG_ENV_ADDR >= (CFG_MONITOR_BASE + CFG_MONITOR_LEN)) ) || \
75 defined(CFG_ENV_IS_IN_NVRAM)
76 #define TOTAL_MALLOC_LEN (CFG_MALLOC_LEN + CFG_ENV_SIZE)
78 #define TOTAL_MALLOC_LEN CFG_MALLOC_LEN
81 extern ulong __init_end
;
84 extern void timer_init(void);
86 #if defined(CONFIG_WATCHDOG)
87 # define INIT_FUNC_WATCHDOG_INIT watchdog_init,
88 # define WATCHDOG_DISABLE watchdog_disable
90 extern int watchdog_init(void);
91 extern int watchdog_disable(void);
93 # define INIT_FUNC_WATCHDOG_INIT /* undef */
94 # define WATCHDOG_DISABLE /* undef */
95 #endif /* CONFIG_WATCHDOG */
97 ulong monitor_flash_len
;
100 * Begin and End of memory area for malloc(), and current "brk"
102 static ulong mem_malloc_start
= 0;
103 static ulong mem_malloc_end
= 0;
104 static ulong mem_malloc_brk
= 0;
106 /************************************************************************
108 ************************************************************************
112 * The Malloc area is immediately below the monitor copy in DRAM
114 static void mem_malloc_init (void)
116 ulong dest_addr
= CFG_MONITOR_BASE
+ gd
->reloc_off
;
118 mem_malloc_end
= dest_addr
;
119 mem_malloc_start
= dest_addr
- TOTAL_MALLOC_LEN
;
120 mem_malloc_brk
= mem_malloc_start
;
122 memset ((void *) mem_malloc_start
,
124 mem_malloc_end
- mem_malloc_start
);
127 void *sbrk (ptrdiff_t increment
)
129 ulong old
= mem_malloc_brk
;
130 ulong
new = old
+ increment
;
132 if ((new < mem_malloc_start
) ||
133 (new > mem_malloc_end
) ) {
136 mem_malloc_brk
= new;
137 return ((void *)old
);
140 char *strmhz(char *buf
, long hz
)
147 l
= sprintf (buf
, "%ld", n
);
149 m
= (hz
% 1000000L) / 1000L;
152 sprintf (buf
+l
, ".%03ld", m
);
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 /************************************************************************
173 ************************************************************************
174 * Some of this code should be moved into the core functions,
175 * but let's get it working (again) first...
178 static int init_baudrate (void)
180 uchar tmp
[64]; /* long enough for environment variables */
181 int i
= getenv_r ("baudrate", tmp
, sizeof (tmp
));
183 gd
->baudrate
= (i
> 0)
184 ? (int) simple_strtoul (tmp
, NULL
, 10)
189 /***********************************************************************/
191 static int init_func_ram (void)
193 int board_type
= 0; /* use dummy arg */
196 if ((gd
->ram_size
= initdram (board_type
)) > 0) {
197 print_size (gd
->ram_size
, "\n");
204 /***********************************************************************/
206 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
207 static int init_func_i2c (void)
210 i2c_init (CFG_I2C_SPEED
, CFG_I2C_SLAVE
);
216 /***********************************************************************/
218 /************************************************************************
219 * Initialization sequence *
220 ************************************************************************
223 init_fnc_t
*init_sequence
[] = {
231 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
235 #if defined(CFG_DRAM_TEST)
237 #endif /* CFG_DRAM_TEST */
238 INIT_FUNC_WATCHDOG_INIT
239 NULL
, /* Terminate this list */
243 /************************************************************************
245 * This is the first part of the initialization sequence that is
246 * implemented in C, but still running from ROM.
248 * The main purpose is to provide a (serial) console interface as
249 * soon as possible (so we can see any error messages), and to
250 * initialize the RAM so that we can relocate the monitor code to
253 * Be aware of the restrictions: global data is read-only, BSS is not
254 * initialized, and stack space is limited to a few kB.
256 ************************************************************************
260 board_init_f (ulong bootflag
)
263 ulong len
, addr
, addr_sp
;
266 init_fnc_t
**init_fnc_ptr
;
270 uchar tmp
[64]; /* long enough for environment variables */
273 /* Pointer is writable since we allocated a register for it */
274 gd
= (gd_t
*) (CFG_INIT_RAM_ADDR
+ CFG_GBL_DATA_OFFSET
);
275 /* compiler optimization barrier needed for GCC >= 3.4 */
276 __asm__
__volatile__("": : :"memory");
278 /* Clear initial global data */
279 memset ((void *) gd
, 0, sizeof (gd_t
));
281 for (init_fnc_ptr
= init_sequence
; *init_fnc_ptr
; ++init_fnc_ptr
) {
282 if ((*init_fnc_ptr
)() != 0) {
288 * Now that we have DRAM mapped and working, we can
289 * relocate the code and continue running from DRAM.
291 * Reserve memory at end of RAM for (top down in that order):
295 * - board info struct
297 len
= (ulong
)&_end
- CFG_MONITOR_BASE
;
299 addr
= CFG_SDRAM_BASE
+ gd
->ram_size
;
301 #ifdef CONFIG_LOGBUFFER
302 /* reserve kernel log buffer */
303 addr
-= (LOGBUFF_RESERVE
);
304 debug ("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN
, addr
);
309 * reserve protected RAM
311 i
= getenv_r ("pram", tmp
, sizeof (tmp
));
312 reg
= (i
> 0) ? simple_strtoul (tmp
, NULL
, 10) : CONFIG_PRAM
;
313 addr
-= (reg
<< 10); /* size is in kB */
314 debug ("Reserving %ldk for protected RAM at %08lx\n", reg
, addr
);
315 #endif /* CONFIG_PRAM */
318 * reserve memory for U-Boot code, data & bss
319 * round down to next 4 kB limit
324 debug ("Reserving %ldk for U-Boot at: %08lx\n", len
>> 10, addr
);
327 * reserve memory for malloc() arena
329 addr_sp
= addr
- TOTAL_MALLOC_LEN
;
330 debug ("Reserving %dk for malloc() at: %08lx\n",
331 TOTAL_MALLOC_LEN
>> 10, addr_sp
);
334 * (permanently) allocate a Board Info struct
335 * and a permanent copy of the "global" data
337 addr_sp
-= sizeof (bd_t
);
338 bd
= (bd_t
*) addr_sp
;
340 debug ("Reserving %d Bytes for Board Info at: %08lx\n",
341 sizeof (bd_t
), addr_sp
);
342 addr_sp
-= sizeof (gd_t
);
343 id
= (gd_t
*) addr_sp
;
344 debug ("Reserving %d Bytes for Global Data at: %08lx\n",
345 sizeof (gd_t
), addr_sp
);
347 /* Reserve memory for boot params. */
348 addr_sp
-= CFG_BOOTPARAMS_LEN
;
349 bd
->bi_boot_params
= addr_sp
;
350 debug ("Reserving %dk for boot parameters at: %08lx\n",
351 CFG_BOOTPARAMS_LEN
>> 10, addr_sp
);
354 * Finally, we set up a new (bigger) stack.
356 * Leave some safety gap for SP, force alignment on 16 byte boundary
357 * Clear initial stack frame
362 paddr
= (ulong
*)addr_sp
;
365 addr_sp
= (ulong
)paddr
;
367 debug ("Stack Pointer at: %08lx\n", addr_sp
);
370 * Save local variables to board info struct
372 bd
->bi_memstart
= CFG_SDRAM_BASE
; /* start of DRAM memory */
373 bd
->bi_memsize
= gd
->ram_size
; /* size of DRAM memory in bytes */
374 bd
->bi_mbar_base
= CFG_MBAR
; /* base of internal registers */
376 bd
->bi_bootflags
= bootflag
; /* boot / reboot flag (for LynxOS) */
379 bd
->bi_intfreq
= gd
->cpu_clk
; /* Internal Freq, in Hz */
380 bd
->bi_busfreq
= gd
->bus_clk
; /* Bus Freq, in Hz */
381 bd
->bi_baudrate
= gd
->baudrate
; /* Console Baudrate */
384 strncpy (bd
->bi_s_version
, "1.2", sizeof (bd
->bi_s_version
));
385 strncpy (bd
->bi_r_version
, U_BOOT_VERSION
, sizeof (bd
->bi_r_version
));
391 post_bootmode_init();
392 post_run (NULL
, POST_ROM
| post_bootmode_get(0));
397 memcpy (id
, (void *)gd
, sizeof (gd_t
));
399 debug ("Start relocate of code from %08x to %08lx\n", CFG_MONITOR_BASE
, addr
);
400 relocate_code (addr_sp
, id
, addr
);
402 /* NOTREACHED - jump_to_ram() does not return */
405 /************************************************************************
407 * This is the next part if the initialization sequence: we are now
408 * running from RAM and have a "normal" C environment, i. e. global
409 * data can be written, BSS has been cleared, the stack size in not
410 * that critical any more, etc.
412 ************************************************************************
414 void board_init_r (gd_t
*id
, ulong dest_addr
)
420 extern void malloc_bin_reloc (void);
422 #ifndef CFG_ENV_IS_NOWHERE
423 extern char * env_name_spec
;
428 gd
= id
; /* initialize RAM version of global data */
431 gd
->flags
|= GD_FLG_RELOC
; /* tell others: relocation done */
433 debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr
);
437 gd
->reloc_off
= dest_addr
- CFG_MONITOR_BASE
;
439 monitor_flash_len
= (ulong
)&__init_end
- dest_addr
;
442 * We have to relocate the command table manually
444 for (cmdtp
= &__u_boot_cmd_start
; cmdtp
!= &__u_boot_cmd_end
; cmdtp
++) {
446 addr
= (ulong
) (cmdtp
->cmd
) + gd
->reloc_off
;
448 printf ("Command \"%s\": 0x%08lx => 0x%08lx\n",
449 cmdtp
->name
, (ulong
) (cmdtp
->cmd
), addr
);
452 (int (*)(struct cmd_tbl_s
*, int, int, char *[]))addr
;
454 addr
= (ulong
)(cmdtp
->name
) + gd
->reloc_off
;
455 cmdtp
->name
= (char *)addr
;
458 addr
= (ulong
)(cmdtp
->usage
) + gd
->reloc_off
;
459 cmdtp
->usage
= (char *)addr
;
463 addr
= (ulong
)(cmdtp
->help
) + gd
->reloc_off
;
464 cmdtp
->help
= (char *)addr
;
468 /* there are some other pointer constants we must deal with */
469 #ifndef CFG_ENV_IS_NOWHERE
470 env_name_spec
+= gd
->reloc_off
;
475 #ifdef CONFIG_LOGBUFFER
476 logbuff_init_ptrs ();
479 post_output_backlog ();
485 /* instruction cache enabled in cpu_init_f() for faster relocation */
486 icache_enable (); /* it's time to enable the instruction cache */
490 * Setup trap handlers
494 #if !defined(CFG_NO_FLASH)
497 if ((flash_size
= flash_init ()) > 0) {
498 # ifdef CFG_FLASH_CHECKSUM
499 print_size (flash_size
, "");
501 * Compute and print flash CRC if flashchecksum is set to 'y'
503 * NOTE: Maybe we should add some WATCHDOG_RESET()? XXX
505 s
= getenv ("flashchecksum");
506 if (s
&& (*s
== 'y')) {
507 printf (" CRC: %08lX",
509 (const unsigned char *) CFG_FLASH_BASE
,
514 # else /* !CFG_FLASH_CHECKSUM */
515 print_size (flash_size
, "\n");
516 # endif /* CFG_FLASH_CHECKSUM */
522 bd
->bi_flashstart
= CFG_FLASH_BASE
; /* update start of FLASH memory */
523 bd
->bi_flashsize
= flash_size
; /* size of FLASH memory (final value) */
524 bd
->bi_flashoffset
= 0;
525 #else /* CFG_NO_FLASH */
526 bd
->bi_flashsize
= 0;
527 bd
->bi_flashstart
= 0;
528 bd
->bi_flashoffset
= 0;
529 #endif /* !CFG_NO_FLASH */
533 /* initialize higher level parts of CPU like time base and timers */
538 /* initialize malloc() area */
543 # if !defined(CFG_ENV_IS_IN_EEPROM)
549 /* relocate environment function pointers etc. */
553 * Fill in missing fields of bd_info.
554 * We do this here, where we have "normal" access to the
555 * environment; we used to do this still running from ROM,
556 * where had to use getenv_r(), which can be pretty slow when
557 * the environment is in EEPROM.
559 s
= getenv ("ethaddr");
560 for (i
= 0; i
< 6; ++i
) {
561 bd
->bi_enetaddr
[i
] = s
? simple_strtoul (s
, &e
, 16) : 0;
563 s
= (*e
) ? e
+ 1 : e
;
567 bd
->bi_ip_addr
= getenv_IPaddr ("ipaddr");
572 /** leave this here (after malloc(), environment and PCI are working) **/
573 /* Initialize devices */
576 /* Initialize the jump table for applications */
579 /* Initialize the console (after the relocation and devices init) */
582 #if defined(CONFIG_MISC_INIT_R)
583 /* miscellaneous platform dependent initialisations */
587 #if (CONFIG_COMMANDS & CFG_CMD_KGDB)
593 debug ("U-Boot relocated to %08lx\n", dest_addr
);
600 /* Must happen after interrupts are initialized since
601 * an irq handler gets installed
605 #ifdef CONFIG_SERIAL_SOFTWARE_FIFO
606 serial_buffered_init();
609 #ifdef CONFIG_STATUS_LED
610 status_led_set (STATUS_LED_BOOT
, STATUS_LED_BLINKING
);
617 /* Insert function pointers now that we have relocated the code */
619 /* Initialize from environment */
620 if ((s
= getenv ("loadaddr")) != NULL
) {
621 load_addr
= simple_strtoul (s
, NULL
, 16);
623 #if (CONFIG_COMMANDS & CFG_CMD_NET)
624 if ((s
= getenv ("bootfile")) != NULL
) {
625 copy_filename (BootFile
, s
, sizeof (BootFile
));
627 #endif /* CFG_CMD_NET */
631 #if (CONFIG_COMMANDS & CFG_CMD_DOC)
637 #if (CONFIG_COMMANDS & CFG_CMD_NAND)
640 nand_init(); /* go init the NAND */
643 #if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(FEC_ENET)
649 post_run (NULL
, POST_RAM
| post_bootmode_get(0));
652 #ifdef CONFIG_LAST_STAGE_INIT
655 * Some parts can be only initialized if all others (like
656 * Interrupts) are up and running (i.e. the PC-style ISA
662 #if (CONFIG_COMMANDS & CFG_CMD_BEDBUG)
667 #if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER)
669 * Export available size of memory for Linux,
670 * taking into account the protected RAM at top of memory
678 if ((s
= getenv ("pram")) != NULL
) {
679 pram
= simple_strtoul (s
, NULL
, 10);
686 #ifdef CONFIG_LOGBUFFER
687 /* Also take the logbuffer into account (pram is in kB) */
688 pram
+= (LOGBUFF_LEN
+LOGBUFF_OVERHEAD
)/1024;
690 sprintf (memsz
, "%ldk", (bd
->bi_memsize
/ 1024) - pram
);
691 setenv ("mem", memsz
);
695 #ifdef CONFIG_MODEM_SUPPORT
697 extern int do_mdm_init
;
698 do_mdm_init
= gd
->do_mdm_init
;
702 #ifdef CONFIG_WATCHDOG
703 /* disable watchdog if environment is set */
704 if ((s
= getenv ("watchdog")) != NULL
) {
705 if (strncmp (s
, "off", 3) == 0) {
709 #endif /* CONFIG_WATCHDOG*/
712 /* Initialization complete - start the monitor */
714 /* main_loop() can return to retry autoboot, if so just run it again. */
720 /* NOTREACHED - no way out of command loop except booting */
726 puts ("### ERROR ### Please RESET the board ###\n");