]>
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,
33 #include <asm/immap.h>
35 #if defined(CONFIG_CMD_IDE)
38 #if defined(CONFIG_CMD_SCSI)
41 #if defined(CONFIG_CMD_KGDB)
44 #ifdef CONFIG_STATUS_LED
45 #include <status_led.h>
49 #if defined(CONFIG_CMD_BEDBUG)
50 #include <cmd_bedbug.h>
52 #ifdef CFG_ALLOC_DPRAM
57 #if defined(CONFIG_HARD_I2C) || \
58 defined(CONFIG_SOFT_I2C)
68 DECLARE_GLOBAL_DATA_PTR
;
70 static char *failed
= "*** failed ***\n";
73 extern flash_info_t flash_info
[];
76 #include <environment.h>
78 #if ( ((CFG_ENV_ADDR+CFG_ENV_SIZE) < CFG_MONITOR_BASE) || \
79 (CFG_ENV_ADDR >= (CFG_MONITOR_BASE + CFG_MONITOR_LEN)) ) || \
80 defined(CFG_ENV_IS_IN_NVRAM)
81 #define TOTAL_MALLOC_LEN (CFG_MALLOC_LEN + CFG_ENV_SIZE)
83 #define TOTAL_MALLOC_LEN CFG_MALLOC_LEN
86 extern ulong __init_end
;
89 extern void timer_init(void);
91 #if defined(CONFIG_WATCHDOG)
92 # define INIT_FUNC_WATCHDOG_INIT watchdog_init,
93 # define WATCHDOG_DISABLE watchdog_disable
95 extern int watchdog_init(void);
96 extern int watchdog_disable(void);
98 # define INIT_FUNC_WATCHDOG_INIT /* undef */
99 # define WATCHDOG_DISABLE /* undef */
100 #endif /* CONFIG_WATCHDOG */
102 ulong monitor_flash_len
;
105 * Begin and End of memory area for malloc(), and current "brk"
107 static ulong mem_malloc_start
= 0;
108 static ulong mem_malloc_end
= 0;
109 static ulong mem_malloc_brk
= 0;
111 /************************************************************************
113 ************************************************************************
117 * The Malloc area is immediately below the monitor copy in DRAM
119 static void mem_malloc_init (void)
121 ulong dest_addr
= CFG_MONITOR_BASE
+ gd
->reloc_off
;
123 mem_malloc_end
= dest_addr
;
124 mem_malloc_start
= dest_addr
- TOTAL_MALLOC_LEN
;
125 mem_malloc_brk
= mem_malloc_start
;
127 memset ((void *) mem_malloc_start
,
129 mem_malloc_end
- mem_malloc_start
);
132 void *sbrk (ptrdiff_t increment
)
134 ulong old
= mem_malloc_brk
;
135 ulong
new = old
+ increment
;
137 if ((new < mem_malloc_start
) ||
138 (new > mem_malloc_end
) ) {
141 mem_malloc_brk
= new;
142 return ((void *)old
);
146 * All attempts to come up with a "common" initialization sequence
147 * that works for all boards and architectures failed: some of the
148 * requirements are just _too_ different. To get rid of the resulting
149 * mess of board dependend #ifdef'ed code we now make the whole
150 * initialization sequence configurable to the user.
152 * The requirements for any new initalization function is simple: it
153 * receives a pointer to the "global data" structure as it's only
154 * argument, and returns an integer return code, where 0 means
155 * "continue" and != 0 means "fatal error, hang the system".
157 typedef int (init_fnc_t
) (void);
159 /************************************************************************
161 ************************************************************************
162 * Some of this code should be moved into the core functions,
163 * but let's get it working (again) first...
166 static int init_baudrate (void)
168 char tmp
[64]; /* long enough for environment variables */
169 int i
= getenv_r ("baudrate", tmp
, sizeof (tmp
));
171 gd
->baudrate
= (i
> 0)
172 ? (int) simple_strtoul (tmp
, NULL
, 10)
177 /***********************************************************************/
179 static int init_func_ram (void)
181 int board_type
= 0; /* use dummy arg */
184 if ((gd
->ram_size
= initdram (board_type
)) > 0) {
185 print_size (gd
->ram_size
, "\n");
192 /***********************************************************************/
194 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
195 static int init_func_i2c (void)
198 i2c_init (CFG_I2C_SPEED
, CFG_I2C_SLAVE
);
204 #if defined(CONFIG_HARD_SPI)
205 static int init_func_spi (void)
214 /***********************************************************************/
216 /************************************************************************
217 * Initialization sequence *
218 ************************************************************************
221 init_fnc_t
*init_sequence
[] = {
230 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
233 #if defined(CONFIG_HARD_SPI)
237 #if defined(CFG_DRAM_TEST)
239 #endif /* CFG_DRAM_TEST */
240 INIT_FUNC_WATCHDOG_INIT
241 NULL
, /* Terminate this list */
245 /************************************************************************
247 * This is the first part of the initialization sequence that is
248 * implemented in C, but still running from ROM.
250 * The main purpose is to provide a (serial) console interface as
251 * soon as possible (so we can see any error messages), and to
252 * initialize the RAM so that we can relocate the monitor code to
255 * Be aware of the restrictions: global data is read-only, BSS is not
256 * initialized, and stack space is limited to a few kB.
258 ************************************************************************
262 board_init_f (ulong bootflag
)
265 ulong len
, addr
, addr_sp
;
268 init_fnc_t
**init_fnc_ptr
;
272 char tmp
[64]; /* long enough for environment variables */
275 /* Pointer is writable since we allocated a register for it */
276 gd
= (gd_t
*) (CFG_INIT_RAM_ADDR
+ CFG_GBL_DATA_OFFSET
);
277 /* compiler optimization barrier needed for GCC >= 3.4 */
278 __asm__
__volatile__("": : :"memory");
280 /* Clear initial global data */
281 memset ((void *) gd
, 0, sizeof (gd_t
));
283 for (init_fnc_ptr
= init_sequence
; *init_fnc_ptr
; ++init_fnc_ptr
) {
284 if ((*init_fnc_ptr
)() != 0) {
290 * Now that we have DRAM mapped and working, we can
291 * relocate the code and continue running from DRAM.
293 * Reserve memory at end of RAM for (top down in that order):
297 * - board info struct
299 len
= (ulong
)&_end
- CFG_MONITOR_BASE
;
301 addr
= CFG_SDRAM_BASE
+ gd
->ram_size
;
303 #ifdef CONFIG_LOGBUFFER
304 /* reserve kernel log buffer */
305 addr
-= (LOGBUFF_RESERVE
);
306 debug ("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN
, addr
);
311 * reserve protected RAM
313 i
= getenv_r ("pram", tmp
, sizeof (tmp
));
314 reg
= (i
> 0) ? simple_strtoul (tmp
, NULL
, 10) : CONFIG_PRAM
;
315 addr
-= (reg
<< 10); /* size is in kB */
316 debug ("Reserving %ldk for protected RAM at %08lx\n", reg
, addr
);
317 #endif /* CONFIG_PRAM */
319 /* round down to next 4 kB limit */
321 debug ("Top of RAM usable for U-Boot at: %08lx\n", addr
);
324 /* reserve memory for LCD display (always full pages) */
325 addr
= lcd_setmem (addr
);
327 #endif /* CONFIG_LCD */
330 * reserve memory for U-Boot code, data & bss
331 * round down to next 4 kB limit
336 debug ("Reserving %ldk for U-Boot at: %08lx\n", len
>> 10, addr
);
339 * reserve memory for malloc() arena
341 addr_sp
= addr
- TOTAL_MALLOC_LEN
;
342 debug ("Reserving %dk for malloc() at: %08lx\n",
343 TOTAL_MALLOC_LEN
>> 10, addr_sp
);
346 * (permanently) allocate a Board Info struct
347 * and a permanent copy of the "global" data
349 addr_sp
-= sizeof (bd_t
);
350 bd
= (bd_t
*) addr_sp
;
352 debug ("Reserving %zu Bytes for Board Info at: %08lx\n",
353 sizeof (bd_t
), addr_sp
);
354 addr_sp
-= sizeof (gd_t
);
355 id
= (gd_t
*) addr_sp
;
356 debug ("Reserving %zu Bytes for Global Data at: %08lx\n",
357 sizeof (gd_t
), addr_sp
);
359 /* Reserve memory for boot params. */
360 addr_sp
-= CFG_BOOTPARAMS_LEN
;
361 bd
->bi_boot_params
= addr_sp
;
362 debug ("Reserving %dk for boot parameters at: %08lx\n",
363 CFG_BOOTPARAMS_LEN
>> 10, addr_sp
);
366 * Finally, we set up a new (bigger) stack.
368 * Leave some safety gap for SP, force alignment on 16 byte boundary
369 * Clear initial stack frame
374 paddr
= (ulong
*)addr_sp
;
377 addr_sp
= (ulong
)paddr
;
379 debug ("Stack Pointer at: %08lx\n", addr_sp
);
382 * Save local variables to board info struct
384 bd
->bi_memstart
= CFG_SDRAM_BASE
; /* start of DRAM memory */
385 bd
->bi_memsize
= gd
->ram_size
; /* size of DRAM memory in bytes */
386 #ifdef CFG_INIT_RAM_ADDR
387 bd
->bi_sramstart
= CFG_INIT_RAM_ADDR
; /* start of SRAM memory */
388 bd
->bi_sramsize
= CFG_INIT_RAM_END
; /* size of SRAM memory */
390 bd
->bi_mbar_base
= CFG_MBAR
; /* base of internal registers */
392 bd
->bi_bootflags
= bootflag
; /* boot / reboot flag (for LynxOS) */
395 bd
->bi_intfreq
= gd
->cpu_clk
; /* Internal Freq, in Hz */
396 bd
->bi_busfreq
= gd
->bus_clk
; /* Bus Freq, in Hz */
398 bd
->bi_pcifreq
= gd
->pci_clk
; /* PCI Freq in Hz */
400 #ifdef CONFIG_EXTRA_CLOCK
401 bd
->bi_inpfreq
= gd
->inp_clk
; /* input Freq in Hz */
402 bd
->bi_vcofreq
= gd
->vco_clk
; /* vco Freq in Hz */
403 bd
->bi_flbfreq
= gd
->flb_clk
; /* flexbus Freq in Hz */
405 bd
->bi_baudrate
= gd
->baudrate
; /* Console Baudrate */
408 strncpy (bd
->bi_s_version
, "1.2", sizeof (bd
->bi_s_version
));
409 strncpy (bd
->bi_r_version
, U_BOOT_VERSION
, sizeof (bd
->bi_r_version
));
415 post_bootmode_init();
416 post_run (NULL
, POST_ROM
| post_bootmode_get(0));
421 memcpy (id
, (void *)gd
, sizeof (gd_t
));
423 debug ("Start relocate of code from %08x to %08lx\n", CFG_MONITOR_BASE
, addr
);
424 relocate_code (addr_sp
, id
, addr
);
426 /* NOTREACHED - jump_to_ram() does not return */
429 /************************************************************************
431 * This is the next part if the initialization sequence: we are now
432 * running from RAM and have a "normal" C environment, i. e. global
433 * data can be written, BSS has been cleared, the stack size in not
434 * that critical any more, etc.
436 ************************************************************************
438 void board_init_r (gd_t
*id
, ulong dest_addr
)
444 extern void malloc_bin_reloc (void);
446 #ifndef CFG_ENV_IS_NOWHERE
447 extern char * env_name_spec
;
452 gd
= id
; /* initialize RAM version of global data */
455 gd
->flags
|= GD_FLG_RELOC
; /* tell others: relocation done */
457 #ifdef CONFIG_SERIAL_MULTI
461 debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr
);
465 gd
->reloc_off
= dest_addr
- CFG_MONITOR_BASE
;
467 monitor_flash_len
= (ulong
)&__init_end
- dest_addr
;
470 * We have to relocate the command table manually
472 for (cmdtp
= &__u_boot_cmd_start
; cmdtp
!= &__u_boot_cmd_end
; cmdtp
++) {
474 addr
= (ulong
) (cmdtp
->cmd
) + gd
->reloc_off
;
476 printf ("Command \"%s\": 0x%08lx => 0x%08lx\n",
477 cmdtp
->name
, (ulong
) (cmdtp
->cmd
), addr
);
480 (int (*)(struct cmd_tbl_s
*, int, int, char *[]))addr
;
482 addr
= (ulong
)(cmdtp
->name
) + gd
->reloc_off
;
483 cmdtp
->name
= (char *)addr
;
486 addr
= (ulong
)(cmdtp
->usage
) + gd
->reloc_off
;
487 cmdtp
->usage
= (char *)addr
;
491 addr
= (ulong
)(cmdtp
->help
) + gd
->reloc_off
;
492 cmdtp
->help
= (char *)addr
;
496 /* there are some other pointer constants we must deal with */
497 #ifndef CFG_ENV_IS_NOWHERE
498 env_name_spec
+= gd
->reloc_off
;
503 #ifdef CONFIG_LOGBUFFER
504 logbuff_init_ptrs ();
507 post_output_backlog ();
513 /* instruction cache enabled in cpu_init_f() for faster relocation */
514 icache_enable (); /* it's time to enable the instruction cache */
518 * Setup trap handlers
520 trap_init (CFG_SDRAM_BASE
);
522 #if !defined(CFG_NO_FLASH)
525 if ((flash_size
= flash_init ()) > 0) {
526 # ifdef CFG_FLASH_CHECKSUM
527 print_size (flash_size
, "");
529 * Compute and print flash CRC if flashchecksum is set to 'y'
531 * NOTE: Maybe we should add some WATCHDOG_RESET()? XXX
533 s
= getenv ("flashchecksum");
534 if (s
&& (*s
== 'y')) {
535 printf (" CRC: %08lX",
537 (const unsigned char *) CFG_FLASH_BASE
,
542 # else /* !CFG_FLASH_CHECKSUM */
543 print_size (flash_size
, "\n");
544 # endif /* CFG_FLASH_CHECKSUM */
550 bd
->bi_flashstart
= CFG_FLASH_BASE
; /* update start of FLASH memory */
551 bd
->bi_flashsize
= flash_size
; /* size of FLASH memory (final value) */
552 bd
->bi_flashoffset
= 0;
553 #else /* CFG_NO_FLASH */
554 bd
->bi_flashsize
= 0;
555 bd
->bi_flashstart
= 0;
556 bd
->bi_flashoffset
= 0;
557 #endif /* !CFG_NO_FLASH */
561 /* initialize higher level parts of CPU like time base and timers */
566 /* initialize malloc() area */
571 # if !defined(CFG_ENV_IS_IN_EEPROM)
577 /* relocate environment function pointers etc. */
581 * Fill in missing fields of bd_info.
582 * We do this here, where we have "normal" access to the
583 * environment; we used to do this still running from ROM,
584 * where had to use getenv_r(), which can be pretty slow when
585 * the environment is in EEPROM.
587 s
= getenv ("ethaddr");
588 for (i
= 0; i
< 6; ++i
) {
589 bd
->bi_enetaddr
[i
] = s
? simple_strtoul (s
, &e
, 16) : 0;
591 s
= (*e
) ? e
+ 1 : e
;
593 #ifdef CONFIG_HAS_ETH1
594 /* handle the 2nd ethernet address */
596 s
= getenv ("eth1addr");
597 for (i
= 0; i
< 6; ++i
) {
598 bd
->bi_enet1addr
[i
] = s
? simple_strtoul (s
, &e
, 16) : 0;
600 s
= (*e
) ? e
+ 1 : e
;
603 #ifdef CONFIG_HAS_ETH2
604 /* handle the 3rd ethernet address */
606 s
= getenv ("eth2addr");
607 for (i
= 0; i
< 6; ++i
) {
608 bd
->bi_enet2addr
[i
] = s
? simple_strtoul (s
, &e
, 16) : 0;
610 s
= (*e
) ? e
+ 1 : e
;
614 #ifdef CONFIG_HAS_ETH3
615 /* handle 4th ethernet address */
616 s
= getenv("eth3addr");
617 for (i
= 0; i
< 6; ++i
) {
618 bd
->bi_enet3addr
[i
] = s
? simple_strtoul (s
, &e
, 16) : 0;
620 s
= (*e
) ? e
+ 1 : e
;
625 bd
->bi_ip_addr
= getenv_IPaddr ("ipaddr");
629 #if defined(CONFIG_PCI)
631 * Do pci configuration
636 /** leave this here (after malloc(), environment and PCI are working) **/
637 /* Initialize devices */
640 /* Initialize the jump table for applications */
643 /* Initialize the console (after the relocation and devices init) */
646 #if defined(CONFIG_MISC_INIT_R)
647 /* miscellaneous platform dependent initialisations */
651 #if defined(CONFIG_CMD_KGDB)
657 debug ("U-Boot relocated to %08lx\n", dest_addr
);
664 /* Must happen after interrupts are initialized since
665 * an irq handler gets installed
669 #ifdef CONFIG_SERIAL_SOFTWARE_FIFO
670 serial_buffered_init();
673 #ifdef CONFIG_STATUS_LED
674 status_led_set (STATUS_LED_BOOT
, STATUS_LED_BLINKING
);
681 /* Insert function pointers now that we have relocated the code */
683 /* Initialize from environment */
684 if ((s
= getenv ("loadaddr")) != NULL
) {
685 load_addr
= simple_strtoul (s
, NULL
, 16);
687 #if defined(CONFIG_CMD_NET)
688 if ((s
= getenv ("bootfile")) != NULL
) {
689 copy_filename (BootFile
, s
, sizeof (BootFile
));
695 #if defined(CONFIG_CMD_DOC)
701 #if defined(CONFIG_CMD_NAND)
704 nand_init(); /* go init the NAND */
707 #if defined(CONFIG_CMD_NET)
709 #if defined(FEC_ENET)
712 #if defined(CONFIG_NET_MULTI)
719 post_run (NULL
, POST_RAM
| post_bootmode_get(0));
722 #if defined(CONFIG_CMD_PCMCIA) \
723 && !defined(CONFIG_CMD_IDE)
729 #if defined(CONFIG_CMD_IDE)
735 #ifdef CONFIG_LAST_STAGE_INIT
738 * Some parts can be only initialized if all others (like
739 * Interrupts) are up and running (i.e. the PC-style ISA
745 #if defined(CONFIG_CMD_BEDBUG)
750 #if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER)
752 * Export available size of memory for Linux,
753 * taking into account the protected RAM at top of memory
761 if ((s
= getenv ("pram")) != NULL
) {
762 pram
= simple_strtoul (s
, NULL
, 10);
769 #ifdef CONFIG_LOGBUFFER
770 /* Also take the logbuffer into account (pram is in kB) */
771 pram
+= (LOGBUFF_LEN
+LOGBUFF_OVERHEAD
)/1024;
773 sprintf (memsz
, "%ldk", (bd
->bi_memsize
/ 1024) - pram
);
774 setenv ("mem", memsz
);
778 #ifdef CONFIG_MODEM_SUPPORT
780 extern int do_mdm_init
;
781 do_mdm_init
= gd
->do_mdm_init
;
785 #ifdef CONFIG_WATCHDOG
786 /* disable watchdog if environment is set */
787 if ((s
= getenv ("watchdog")) != NULL
) {
788 if (strncmp (s
, "off", 3) == 0) {
792 #endif /* CONFIG_WATCHDOG*/
795 /* Initialization complete - start the monitor */
797 /* main_loop() can return to retry autoboot, if so just run it again. */
803 /* NOTREACHED - no way out of command loop except booting */
809 puts ("### ERROR ### Please RESET the board ###\n");