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,
31 #include <stdio_dev.h>
32 #include <linux/compiler.h>
34 #include <asm/immap.h>
36 #if defined(CONFIG_CMD_IDE)
39 #if defined(CONFIG_CMD_SCSI)
42 #if defined(CONFIG_CMD_KGDB)
45 #ifdef CONFIG_STATUS_LED
46 #include <status_led.h>
50 #if defined(CONFIG_CMD_BEDBUG)
51 #include <cmd_bedbug.h>
53 #ifdef CONFIG_SYS_ALLOC_DPRAM
58 #if defined(CONFIG_HARD_I2C) || \
59 defined(CONFIG_SOFT_I2C)
67 #ifdef CONFIG_BITBANGMII
73 DECLARE_GLOBAL_DATA_PTR
;
75 static char *failed
= "*** failed ***\n";
77 #include <environment.h>
79 extern ulong __init_end
;
80 extern ulong __bss_end__
;
82 #if defined(CONFIG_WATCHDOG)
83 # define INIT_FUNC_WATCHDOG_INIT watchdog_init,
84 # define WATCHDOG_DISABLE watchdog_disable
86 extern int watchdog_init(void);
87 extern int watchdog_disable(void);
89 # define INIT_FUNC_WATCHDOG_INIT /* undef */
90 # define WATCHDOG_DISABLE /* undef */
91 #endif /* CONFIG_WATCHDOG */
93 ulong monitor_flash_len
;
95 /************************************************************************
97 ************************************************************************
101 * All attempts to come up with a "common" initialization sequence
102 * that works for all boards and architectures failed: some of the
103 * requirements are just _too_ different. To get rid of the resulting
104 * mess of board dependend #ifdef'ed code we now make the whole
105 * initialization sequence configurable to the user.
107 * The requirements for any new initalization function is simple: it
108 * receives a pointer to the "global data" structure as it's only
109 * argument, and returns an integer return code, where 0 means
110 * "continue" and != 0 means "fatal error, hang the system".
112 typedef int (init_fnc_t
) (void);
114 /************************************************************************
116 ************************************************************************
117 * Some of this code should be moved into the core functions,
118 * but let's get it working (again) first...
121 static int init_baudrate (void)
123 gd
->baudrate
= getenv_ulong("baudrate", 10, CONFIG_BAUDRATE
);
127 /***********************************************************************/
129 static int init_func_ram (void)
131 int board_type
= 0; /* use dummy arg */
134 if ((gd
->ram_size
= initdram (board_type
)) > 0) {
135 print_size (gd
->ram_size
, "\n");
142 /***********************************************************************/
144 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
145 static int init_func_i2c (void)
148 i2c_init (CONFIG_SYS_I2C_SPEED
, CONFIG_SYS_I2C_SLAVE
);
154 #if defined(CONFIG_HARD_SPI)
155 static int init_func_spi (void)
164 /***********************************************************************/
166 /************************************************************************
167 * Initialization sequence *
168 ************************************************************************
171 init_fnc_t
*init_sequence
[] = {
180 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
183 #if defined(CONFIG_HARD_SPI)
187 #if defined(CONFIG_SYS_DRAM_TEST)
189 #endif /* CONFIG_SYS_DRAM_TEST */
190 INIT_FUNC_WATCHDOG_INIT
191 NULL
, /* Terminate this list */
195 /************************************************************************
197 * This is the first part of the initialization sequence that is
198 * implemented in C, but still running from ROM.
200 * The main purpose is to provide a (serial) console interface as
201 * soon as possible (so we can see any error messages), and to
202 * initialize the RAM so that we can relocate the monitor code to
205 * Be aware of the restrictions: global data is read-only, BSS is not
206 * initialized, and stack space is limited to a few kB.
208 ************************************************************************
212 board_init_f (ulong bootflag
)
215 ulong len
, addr
, addr_sp
;
218 init_fnc_t
**init_fnc_ptr
;
223 /* Pointer is writable since we allocated a register for it */
224 gd
= (gd_t
*) (CONFIG_SYS_INIT_RAM_ADDR
+ CONFIG_SYS_GBL_DATA_OFFSET
);
225 /* compiler optimization barrier needed for GCC >= 3.4 */
226 __asm__
__volatile__("": : :"memory");
228 /* Clear initial global data */
229 memset ((void *) gd
, 0, sizeof (gd_t
));
231 for (init_fnc_ptr
= init_sequence
; *init_fnc_ptr
; ++init_fnc_ptr
) {
232 if ((*init_fnc_ptr
)() != 0) {
238 * Now that we have DRAM mapped and working, we can
239 * relocate the code and continue running from DRAM.
241 * Reserve memory at end of RAM for (top down in that order):
245 * - board info struct
247 len
= (ulong
)&__bss_end__
- CONFIG_SYS_MONITOR_BASE
;
249 addr
= CONFIG_SYS_SDRAM_BASE
+ gd
->ram_size
;
251 #ifdef CONFIG_LOGBUFFER
252 /* reserve kernel log buffer */
253 addr
-= (LOGBUFF_RESERVE
);
254 debug ("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN
, addr
);
259 * reserve protected RAM
261 reg
= getenv_ulong("pram", 10, CONFIG_PRAM
);
262 addr
-= (reg
<< 10); /* size is in kB */
263 debug ("Reserving %ldk for protected RAM at %08lx\n", reg
, addr
);
264 #endif /* CONFIG_PRAM */
266 /* round down to next 4 kB limit */
268 debug ("Top of RAM usable for U-Boot at: %08lx\n", addr
);
271 #ifdef CONFIG_FB_ADDR
272 gd
->fb_base
= CONFIG_FB_ADDR
;
274 /* reserve memory for LCD display (always full pages) */
275 addr
= lcd_setmem (addr
);
277 #endif /* CONFIG_FB_ADDR */
278 #endif /* CONFIG_LCD */
281 * reserve memory for U-Boot code, data & bss
282 * round down to next 4 kB limit
287 debug ("Reserving %ldk for U-Boot at: %08lx\n", len
>> 10, addr
);
290 * reserve memory for malloc() arena
292 addr_sp
= addr
- TOTAL_MALLOC_LEN
;
293 debug ("Reserving %dk for malloc() at: %08lx\n",
294 TOTAL_MALLOC_LEN
>> 10, addr_sp
);
297 * (permanently) allocate a Board Info struct
298 * and a permanent copy of the "global" data
300 addr_sp
-= sizeof (bd_t
);
301 bd
= (bd_t
*) addr_sp
;
303 debug ("Reserving %zu Bytes for Board Info at: %08lx\n",
304 sizeof (bd_t
), addr_sp
);
305 addr_sp
-= sizeof (gd_t
);
306 id
= (gd_t
*) addr_sp
;
307 debug ("Reserving %zu Bytes for Global Data at: %08lx\n",
308 sizeof (gd_t
), addr_sp
);
310 /* Reserve memory for boot params. */
311 addr_sp
-= CONFIG_SYS_BOOTPARAMS_LEN
;
312 bd
->bi_boot_params
= addr_sp
;
313 debug ("Reserving %dk for boot parameters at: %08lx\n",
314 CONFIG_SYS_BOOTPARAMS_LEN
>> 10, addr_sp
);
317 * Finally, we set up a new (bigger) stack.
319 * Leave some safety gap for SP, force alignment on 16 byte boundary
320 * Clear initial stack frame
325 paddr
= (ulong
*)addr_sp
;
328 addr_sp
= (ulong
)paddr
;
330 debug ("Stack Pointer at: %08lx\n", addr_sp
);
333 * Save local variables to board info struct
335 bd
->bi_memstart
= CONFIG_SYS_SDRAM_BASE
; /* start of DRAM memory */
336 bd
->bi_memsize
= gd
->ram_size
; /* size of DRAM memory in bytes */
337 #ifdef CONFIG_SYS_INIT_RAM_ADDR
338 bd
->bi_sramstart
= CONFIG_SYS_INIT_RAM_ADDR
; /* start of SRAM memory */
339 bd
->bi_sramsize
= CONFIG_SYS_INIT_RAM_SIZE
; /* size of SRAM memory */
341 bd
->bi_mbar_base
= CONFIG_SYS_MBAR
; /* base of internal registers */
343 bd
->bi_bootflags
= bootflag
; /* boot / reboot flag (for LynxOS) */
346 bd
->bi_intfreq
= gd
->cpu_clk
; /* Internal Freq, in Hz */
347 bd
->bi_busfreq
= gd
->bus_clk
; /* Bus Freq, in Hz */
349 bd
->bi_pcifreq
= gd
->pci_clk
; /* PCI Freq in Hz */
351 #ifdef CONFIG_EXTRA_CLOCK
352 bd
->bi_inpfreq
= gd
->arch
.inp_clk
; /* input Freq in Hz */
353 bd
->bi_vcofreq
= gd
->arch
.vco_clk
; /* vco Freq in Hz */
354 bd
->bi_flbfreq
= gd
->arch
.flb_clk
; /* flexbus Freq in Hz */
356 bd
->bi_baudrate
= gd
->baudrate
; /* Console Baudrate */
358 #ifdef CONFIG_SYS_EXTBDINFO
359 strncpy (bd
->bi_s_version
, "1.2", sizeof (bd
->bi_s_version
));
360 strncpy (bd
->bi_r_version
, U_BOOT_VERSION
, sizeof (bd
->bi_r_version
));
366 post_bootmode_init();
367 post_run (NULL
, POST_ROM
| post_bootmode_get(0));
372 memcpy (id
, (void *)gd
, sizeof (gd_t
));
374 debug ("Start relocate of code from %08x to %08lx\n", CONFIG_SYS_MONITOR_BASE
, addr
);
375 relocate_code (addr_sp
, id
, addr
);
377 /* NOTREACHED - jump_to_ram() does not return */
380 /************************************************************************
382 * This is the next part if the initialization sequence: we are now
383 * running from RAM and have a "normal" C environment, i. e. global
384 * data can be written, BSS has been cleared, the stack size in not
385 * that critical any more, etc.
387 ************************************************************************
389 void board_init_r (gd_t
*id
, ulong dest_addr
)
391 char *s __maybe_unused
;
394 #ifndef CONFIG_ENV_IS_NOWHERE
395 extern char * env_name_spec
;
397 #ifndef CONFIG_SYS_NO_FLASH
400 gd
= id
; /* initialize RAM version of global data */
403 gd
->flags
|= GD_FLG_RELOC
; /* tell others: relocation done */
405 debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr
);
409 gd
->reloc_off
= dest_addr
- CONFIG_SYS_MONITOR_BASE
;
413 monitor_flash_len
= (ulong
)&__init_end
- dest_addr
;
415 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
417 * We have to relocate the command table manually
419 fixup_cmdtable(ll_entry_start(cmd_tbl_t
, cmd
),
420 ll_entry_count(cmd_tbl_t
, cmd
));
421 #endif /* defined(CONFIG_NEEDS_MANUAL_RELOC) */
423 /* there are some other pointer constants we must deal with */
424 #ifndef CONFIG_ENV_IS_NOWHERE
425 env_name_spec
+= gd
->reloc_off
;
430 #ifdef CONFIG_LOGBUFFER
431 logbuff_init_ptrs ();
434 post_output_backlog ();
440 /* instruction cache enabled in cpu_init_f() for faster relocation */
441 icache_enable (); /* it's time to enable the instruction cache */
445 * Setup trap handlers
447 trap_init (CONFIG_SYS_SDRAM_BASE
);
449 /* The Malloc area is immediately below the monitor copy in DRAM */
450 mem_malloc_init (CONFIG_SYS_MONITOR_BASE
+ gd
->reloc_off
-
451 TOTAL_MALLOC_LEN
, TOTAL_MALLOC_LEN
);
454 #if !defined(CONFIG_SYS_NO_FLASH)
457 if ((flash_size
= flash_init ()) > 0) {
458 # ifdef CONFIG_SYS_FLASH_CHECKSUM
459 print_size (flash_size
, "");
461 * Compute and print flash CRC if flashchecksum is set to 'y'
463 * NOTE: Maybe we should add some WATCHDOG_RESET()? XXX
465 if (getenv_yesno("flashchecksum") == 1) {
466 printf (" CRC: %08X",
468 (const unsigned char *) CONFIG_SYS_FLASH_BASE
,
473 # else /* !CONFIG_SYS_FLASH_CHECKSUM */
474 print_size (flash_size
, "\n");
475 # endif /* CONFIG_SYS_FLASH_CHECKSUM */
481 bd
->bi_flashstart
= CONFIG_SYS_FLASH_BASE
; /* update start of FLASH memory */
482 bd
->bi_flashsize
= flash_size
; /* size of FLASH memory (final value) */
483 bd
->bi_flashoffset
= 0;
484 #else /* CONFIG_SYS_NO_FLASH */
485 bd
->bi_flashsize
= 0;
486 bd
->bi_flashstart
= 0;
487 bd
->bi_flashoffset
= 0;
488 #endif /* !CONFIG_SYS_NO_FLASH */
492 /* initialize higher level parts of CPU like time base and timers */
498 # if !defined(CONFIG_ENV_IS_IN_EEPROM)
504 /* relocate environment function pointers etc. */
509 #if defined(CONFIG_PCI)
511 * Do pci configuration
516 /** leave this here (after malloc(), environment and PCI are working) **/
517 /* Initialize stdio devices */
520 /* Initialize the jump table for applications */
523 /* Initialize the console (after the relocation and devices init) */
526 #if defined(CONFIG_MISC_INIT_R)
527 /* miscellaneous platform dependent initialisations */
531 #if defined(CONFIG_CMD_KGDB)
537 debug ("U-Boot relocated to %08lx\n", dest_addr
);
544 /* Must happen after interrupts are initialized since
545 * an irq handler gets installed
549 #ifdef CONFIG_STATUS_LED
550 status_led_set (STATUS_LED_BOOT
, STATUS_LED_BLINKING
);
555 /* Insert function pointers now that we have relocated the code */
557 /* Initialize from environment */
558 load_addr
= getenv_ulong("loadaddr", 16, load_addr
);
562 #if defined(CONFIG_CMD_DOC)
568 #if defined(CONFIG_CMD_NAND)
571 nand_init(); /* go init the NAND */
574 #ifdef CONFIG_BITBANGMII
577 #if defined(CONFIG_CMD_NET)
579 #if defined(FEC_ENET)
587 post_run (NULL
, POST_RAM
| post_bootmode_get(0));
590 #if defined(CONFIG_CMD_PCMCIA) \
591 && !defined(CONFIG_CMD_IDE)
597 #if defined(CONFIG_CMD_IDE)
603 #ifdef CONFIG_LAST_STAGE_INIT
606 * Some parts can be only initialized if all others (like
607 * Interrupts) are up and running (i.e. the PC-style ISA
613 #if defined(CONFIG_CMD_BEDBUG)
618 #if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER)
620 * Export available size of memory for Linux,
621 * taking into account the protected RAM at top of memory
628 pram
= getenv_ulong("pram", 10, CONFIG_PRAM
);
630 #ifdef CONFIG_LOGBUFFER
631 /* Also take the logbuffer into account (pram is in kB) */
632 pram
+= (LOGBUFF_LEN
+LOGBUFF_OVERHEAD
)/1024;
634 sprintf (memsz
, "%ldk", (bd
->bi_memsize
/ 1024) - pram
);
635 setenv ("mem", memsz
);
639 #ifdef CONFIG_MODEM_SUPPORT
641 extern int do_mdm_init
;
642 do_mdm_init
= gd
->do_mdm_init
;
646 #ifdef CONFIG_WATCHDOG
647 /* disable watchdog if environment is set */
648 if ((s
= getenv ("watchdog")) != NULL
) {
649 if (strncmp (s
, "off", 3) == 0) {
653 #endif /* CONFIG_WATCHDOG*/
656 /* Initialization complete - start the monitor */
658 /* main_loop() can return to retry autoboot, if so just run it again. */
664 /* NOTREACHED - no way out of command loop except booting */
670 puts ("### ERROR ### Please RESET the board ###\n");