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>
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 CONFIG_SYS_ALLOC_DPRAM
57 #if defined(CONFIG_HARD_I2C) || \
58 defined(CONFIG_SOFT_I2C)
66 #ifdef CONFIG_BITBANGMII
72 DECLARE_GLOBAL_DATA_PTR
;
74 static char *failed
= "*** failed ***\n";
76 #include <environment.h>
78 extern ulong __init_end
;
81 extern void timer_init(void);
83 #if defined(CONFIG_WATCHDOG)
84 # define INIT_FUNC_WATCHDOG_INIT watchdog_init,
85 # define WATCHDOG_DISABLE watchdog_disable
87 extern int watchdog_init(void);
88 extern int watchdog_disable(void);
90 # define INIT_FUNC_WATCHDOG_INIT /* undef */
91 # define WATCHDOG_DISABLE /* undef */
92 #endif /* CONFIG_WATCHDOG */
94 ulong monitor_flash_len
;
96 /************************************************************************
98 ************************************************************************
102 * All attempts to come up with a "common" initialization sequence
103 * that works for all boards and architectures failed: some of the
104 * requirements are just _too_ different. To get rid of the resulting
105 * mess of board dependend #ifdef'ed code we now make the whole
106 * initialization sequence configurable to the user.
108 * The requirements for any new initalization function is simple: it
109 * receives a pointer to the "global data" structure as it's only
110 * argument, and returns an integer return code, where 0 means
111 * "continue" and != 0 means "fatal error, hang the system".
113 typedef int (init_fnc_t
) (void);
115 /************************************************************************
117 ************************************************************************
118 * Some of this code should be moved into the core functions,
119 * but let's get it working (again) first...
122 static int init_baudrate (void)
124 char tmp
[64]; /* long enough for environment variables */
125 int i
= getenv_f("baudrate", tmp
, sizeof (tmp
));
127 gd
->baudrate
= (i
> 0)
128 ? (int) simple_strtoul (tmp
, NULL
, 10)
133 /***********************************************************************/
135 static int init_func_ram (void)
137 int board_type
= 0; /* use dummy arg */
140 if ((gd
->ram_size
= initdram (board_type
)) > 0) {
141 print_size (gd
->ram_size
, "\n");
148 /***********************************************************************/
150 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
151 static int init_func_i2c (void)
154 i2c_init (CONFIG_SYS_I2C_SPEED
, CONFIG_SYS_I2C_SLAVE
);
160 #if defined(CONFIG_HARD_SPI)
161 static int init_func_spi (void)
170 /***********************************************************************/
172 /************************************************************************
173 * Initialization sequence *
174 ************************************************************************
177 init_fnc_t
*init_sequence
[] = {
186 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
189 #if defined(CONFIG_HARD_SPI)
193 #if defined(CONFIG_SYS_DRAM_TEST)
195 #endif /* CONFIG_SYS_DRAM_TEST */
196 INIT_FUNC_WATCHDOG_INIT
197 NULL
, /* Terminate this list */
201 /************************************************************************
203 * This is the first part of the initialization sequence that is
204 * implemented in C, but still running from ROM.
206 * The main purpose is to provide a (serial) console interface as
207 * soon as possible (so we can see any error messages), and to
208 * initialize the RAM so that we can relocate the monitor code to
211 * Be aware of the restrictions: global data is read-only, BSS is not
212 * initialized, and stack space is limited to a few kB.
214 ************************************************************************
218 board_init_f (ulong bootflag
)
221 ulong len
, addr
, addr_sp
;
224 init_fnc_t
**init_fnc_ptr
;
228 char tmp
[64]; /* long enough for environment variables */
231 /* Pointer is writable since we allocated a register for it */
232 gd
= (gd_t
*) (CONFIG_SYS_INIT_RAM_ADDR
+ CONFIG_SYS_GBL_DATA_OFFSET
);
233 /* compiler optimization barrier needed for GCC >= 3.4 */
234 __asm__
__volatile__("": : :"memory");
236 /* Clear initial global data */
237 memset ((void *) gd
, 0, sizeof (gd_t
));
239 for (init_fnc_ptr
= init_sequence
; *init_fnc_ptr
; ++init_fnc_ptr
) {
240 if ((*init_fnc_ptr
)() != 0) {
246 * Now that we have DRAM mapped and working, we can
247 * relocate the code and continue running from DRAM.
249 * Reserve memory at end of RAM for (top down in that order):
253 * - board info struct
255 len
= (ulong
)&_end
- CONFIG_SYS_MONITOR_BASE
;
257 addr
= CONFIG_SYS_SDRAM_BASE
+ gd
->ram_size
;
259 #ifdef CONFIG_LOGBUFFER
260 /* reserve kernel log buffer */
261 addr
-= (LOGBUFF_RESERVE
);
262 debug ("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN
, addr
);
267 * reserve protected RAM
269 i
= getenv_f("pram", tmp
, sizeof (tmp
));
270 reg
= (i
> 0) ? simple_strtoul (tmp
, NULL
, 10) : CONFIG_PRAM
;
271 addr
-= (reg
<< 10); /* size is in kB */
272 debug ("Reserving %ldk for protected RAM at %08lx\n", reg
, addr
);
273 #endif /* CONFIG_PRAM */
275 /* round down to next 4 kB limit */
277 debug ("Top of RAM usable for U-Boot at: %08lx\n", addr
);
280 /* reserve memory for LCD display (always full pages) */
281 addr
= lcd_setmem (addr
);
283 #endif /* CONFIG_LCD */
286 * reserve memory for U-Boot code, data & bss
287 * round down to next 4 kB limit
292 debug ("Reserving %ldk for U-Boot at: %08lx\n", len
>> 10, addr
);
295 * reserve memory for malloc() arena
297 addr_sp
= addr
- TOTAL_MALLOC_LEN
;
298 debug ("Reserving %dk for malloc() at: %08lx\n",
299 TOTAL_MALLOC_LEN
>> 10, addr_sp
);
302 * (permanently) allocate a Board Info struct
303 * and a permanent copy of the "global" data
305 addr_sp
-= sizeof (bd_t
);
306 bd
= (bd_t
*) addr_sp
;
308 debug ("Reserving %zu Bytes for Board Info at: %08lx\n",
309 sizeof (bd_t
), addr_sp
);
310 addr_sp
-= sizeof (gd_t
);
311 id
= (gd_t
*) addr_sp
;
312 debug ("Reserving %zu Bytes for Global Data at: %08lx\n",
313 sizeof (gd_t
), addr_sp
);
315 /* Reserve memory for boot params. */
316 addr_sp
-= CONFIG_SYS_BOOTPARAMS_LEN
;
317 bd
->bi_boot_params
= addr_sp
;
318 debug ("Reserving %dk for boot parameters at: %08lx\n",
319 CONFIG_SYS_BOOTPARAMS_LEN
>> 10, addr_sp
);
322 * Finally, we set up a new (bigger) stack.
324 * Leave some safety gap for SP, force alignment on 16 byte boundary
325 * Clear initial stack frame
330 paddr
= (ulong
*)addr_sp
;
333 addr_sp
= (ulong
)paddr
;
335 debug ("Stack Pointer at: %08lx\n", addr_sp
);
338 * Save local variables to board info struct
340 bd
->bi_memstart
= CONFIG_SYS_SDRAM_BASE
; /* start of DRAM memory */
341 bd
->bi_memsize
= gd
->ram_size
; /* size of DRAM memory in bytes */
342 #ifdef CONFIG_SYS_INIT_RAM_ADDR
343 bd
->bi_sramstart
= CONFIG_SYS_INIT_RAM_ADDR
; /* start of SRAM memory */
344 bd
->bi_sramsize
= CONFIG_SYS_INIT_RAM_SIZE
; /* size of SRAM memory */
346 bd
->bi_mbar_base
= CONFIG_SYS_MBAR
; /* base of internal registers */
348 bd
->bi_bootflags
= bootflag
; /* boot / reboot flag (for LynxOS) */
351 bd
->bi_intfreq
= gd
->cpu_clk
; /* Internal Freq, in Hz */
352 bd
->bi_busfreq
= gd
->bus_clk
; /* Bus Freq, in Hz */
354 bd
->bi_pcifreq
= gd
->pci_clk
; /* PCI Freq in Hz */
356 #ifdef CONFIG_EXTRA_CLOCK
357 bd
->bi_inpfreq
= gd
->inp_clk
; /* input Freq in Hz */
358 bd
->bi_vcofreq
= gd
->vco_clk
; /* vco Freq in Hz */
359 bd
->bi_flbfreq
= gd
->flb_clk
; /* flexbus Freq in Hz */
361 bd
->bi_baudrate
= gd
->baudrate
; /* Console Baudrate */
363 #ifdef CONFIG_SYS_EXTBDINFO
364 strncpy (bd
->bi_s_version
, "1.2", sizeof (bd
->bi_s_version
));
365 strncpy (bd
->bi_r_version
, U_BOOT_VERSION
, sizeof (bd
->bi_r_version
));
371 post_bootmode_init();
372 post_run (NULL
, POST_ROM
| post_bootmode_get(0));
377 memcpy (id
, (void *)gd
, sizeof (gd_t
));
379 debug ("Start relocate of code from %08x to %08lx\n", CONFIG_SYS_MONITOR_BASE
, addr
);
380 relocate_code (addr_sp
, id
, addr
);
382 /* NOTREACHED - jump_to_ram() does not return */
385 /************************************************************************
387 * This is the next part if the initialization sequence: we are now
388 * running from RAM and have a "normal" C environment, i. e. global
389 * data can be written, BSS has been cleared, the stack size in not
390 * that critical any more, etc.
392 ************************************************************************
394 void board_init_r (gd_t
*id
, ulong dest_addr
)
398 extern void malloc_bin_reloc (void);
400 #ifndef CONFIG_ENV_IS_NOWHERE
401 extern char * env_name_spec
;
403 #ifndef CONFIG_SYS_NO_FLASH
406 gd
= id
; /* initialize RAM version of global data */
409 gd
->flags
|= GD_FLG_RELOC
; /* tell others: relocation done */
411 #ifdef CONFIG_SERIAL_MULTI
415 debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr
);
419 gd
->reloc_off
= dest_addr
- CONFIG_SYS_MONITOR_BASE
;
421 monitor_flash_len
= (ulong
)&__init_end
- dest_addr
;
423 #if !defined(CONFIG_RELOC_FIXUP_WORKS)
425 * We have to relocate the command table manually
427 fixup_cmdtable(&__u_boot_cmd_start
,
428 (ulong
)(&__u_boot_cmd_end
- &__u_boot_cmd_start
));
429 #endif /* !defined(CONFIG_RELOC_FIXUP_WORKS) */
431 /* there are some other pointer constants we must deal with */
432 #ifndef CONFIG_ENV_IS_NOWHERE
433 env_name_spec
+= gd
->reloc_off
;
438 #ifdef CONFIG_LOGBUFFER
439 logbuff_init_ptrs ();
442 post_output_backlog ();
448 /* instruction cache enabled in cpu_init_f() for faster relocation */
449 icache_enable (); /* it's time to enable the instruction cache */
453 * Setup trap handlers
455 trap_init (CONFIG_SYS_SDRAM_BASE
);
457 /* The Malloc area is immediately below the monitor copy in DRAM */
458 mem_malloc_init (CONFIG_SYS_MONITOR_BASE
+ gd
->reloc_off
-
459 TOTAL_MALLOC_LEN
, TOTAL_MALLOC_LEN
);
462 #if !defined(CONFIG_SYS_NO_FLASH)
465 if ((flash_size
= flash_init ()) > 0) {
466 # ifdef CONFIG_SYS_FLASH_CHECKSUM
467 print_size (flash_size
, "");
469 * Compute and print flash CRC if flashchecksum is set to 'y'
471 * NOTE: Maybe we should add some WATCHDOG_RESET()? XXX
473 s
= getenv ("flashchecksum");
474 if (s
&& (*s
== 'y')) {
475 printf (" CRC: %08X",
477 (const unsigned char *) CONFIG_SYS_FLASH_BASE
,
482 # else /* !CONFIG_SYS_FLASH_CHECKSUM */
483 print_size (flash_size
, "\n");
484 # endif /* CONFIG_SYS_FLASH_CHECKSUM */
490 bd
->bi_flashstart
= CONFIG_SYS_FLASH_BASE
; /* update start of FLASH memory */
491 bd
->bi_flashsize
= flash_size
; /* size of FLASH memory (final value) */
492 bd
->bi_flashoffset
= 0;
493 #else /* CONFIG_SYS_NO_FLASH */
494 bd
->bi_flashsize
= 0;
495 bd
->bi_flashstart
= 0;
496 bd
->bi_flashoffset
= 0;
497 #endif /* !CONFIG_SYS_NO_FLASH */
501 /* initialize higher level parts of CPU like time base and timers */
507 # if !defined(CONFIG_ENV_IS_IN_EEPROM)
513 /* relocate environment function pointers etc. */
517 * Fill in missing fields of bd_info.
518 * We do this here, where we have "normal" access to the
519 * environment; we used to do this still running from ROM,
520 * where had to use getenv_f(), which can be pretty slow when
521 * the environment is in EEPROM.
523 bd
->bi_ip_addr
= getenv_IPaddr ("ipaddr");
527 #if defined(CONFIG_PCI)
529 * Do pci configuration
534 /** leave this here (after malloc(), environment and PCI are working) **/
535 /* Initialize stdio devices */
538 /* Initialize the jump table for applications */
541 /* Initialize the console (after the relocation and devices init) */
544 #if defined(CONFIG_MISC_INIT_R)
545 /* miscellaneous platform dependent initialisations */
549 #if defined(CONFIG_CMD_KGDB)
555 debug ("U-Boot relocated to %08lx\n", dest_addr
);
562 /* Must happen after interrupts are initialized since
563 * an irq handler gets installed
567 #ifdef CONFIG_STATUS_LED
568 status_led_set (STATUS_LED_BOOT
, STATUS_LED_BLINKING
);
575 /* Insert function pointers now that we have relocated the code */
577 /* Initialize from environment */
578 if ((s
= getenv ("loadaddr")) != NULL
) {
579 load_addr
= simple_strtoul (s
, NULL
, 16);
581 #if defined(CONFIG_CMD_NET)
582 if ((s
= getenv ("bootfile")) != NULL
) {
583 copy_filename (BootFile
, s
, sizeof (BootFile
));
589 #if defined(CONFIG_CMD_DOC)
595 #if defined(CONFIG_CMD_NAND)
598 nand_init(); /* go init the NAND */
601 #ifdef CONFIG_BITBANGMII
604 #if defined(CONFIG_CMD_NET)
606 #if defined(FEC_ENET)
609 #if defined(CONFIG_NET_MULTI)
616 post_run (NULL
, POST_RAM
| post_bootmode_get(0));
619 #if defined(CONFIG_CMD_PCMCIA) \
620 && !defined(CONFIG_CMD_IDE)
626 #if defined(CONFIG_CMD_IDE)
632 #ifdef CONFIG_LAST_STAGE_INIT
635 * Some parts can be only initialized if all others (like
636 * Interrupts) are up and running (i.e. the PC-style ISA
642 #if defined(CONFIG_CMD_BEDBUG)
647 #if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER)
649 * Export available size of memory for Linux,
650 * taking into account the protected RAM at top of memory
658 if ((s
= getenv ("pram")) != NULL
) {
659 pram
= simple_strtoul (s
, NULL
, 10);
666 #ifdef CONFIG_LOGBUFFER
667 /* Also take the logbuffer into account (pram is in kB) */
668 pram
+= (LOGBUFF_LEN
+LOGBUFF_OVERHEAD
)/1024;
670 sprintf (memsz
, "%ldk", (bd
->bi_memsize
/ 1024) - pram
);
671 setenv ("mem", memsz
);
675 #ifdef CONFIG_MODEM_SUPPORT
677 extern int do_mdm_init
;
678 do_mdm_init
= gd
->do_mdm_init
;
682 #ifdef CONFIG_WATCHDOG
683 /* disable watchdog if environment is set */
684 if ((s
= getenv ("watchdog")) != NULL
) {
685 if (strncmp (s
, "off", 3) == 0) {
689 #endif /* CONFIG_WATCHDOG*/
692 /* Initialization complete - start the monitor */
694 /* main_loop() can return to retry autoboot, if so just run it again. */
700 /* NOTREACHED - no way out of command loop except booting */
706 puts ("### ERROR ### Please RESET the board ###\n");