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->inp_clk; /* input Freq in Hz */
353 bd->bi_vcofreq = gd->vco_clk; /* vco Freq in Hz */
354 bd->bi_flbfreq = gd->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 */
407 debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
411 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 s = getenv ("flashchecksum");
466 if (s && (*s == 'y')) {
467 printf (" CRC: %08X",
469 (const unsigned char *) CONFIG_SYS_FLASH_BASE,
474 # else /* !CONFIG_SYS_FLASH_CHECKSUM */
475 print_size (flash_size, "\n");
476 # endif /* CONFIG_SYS_FLASH_CHECKSUM */
482 bd->bi_flashstart = CONFIG_SYS_FLASH_BASE; /* update start of FLASH memory */
483 bd->bi_flashsize = flash_size; /* size of FLASH memory (final value) */
484 bd->bi_flashoffset = 0;
485 #else /* CONFIG_SYS_NO_FLASH */
486 bd->bi_flashsize = 0;
487 bd->bi_flashstart = 0;
488 bd->bi_flashoffset = 0;
489 #endif /* !CONFIG_SYS_NO_FLASH */
493 /* initialize higher level parts of CPU like time base and timers */
499 # if !defined(CONFIG_ENV_IS_IN_EEPROM)
505 /* relocate environment function pointers etc. */
510 #if defined(CONFIG_PCI)
512 * Do pci configuration
517 /** leave this here (after malloc(), environment and PCI are working) **/
518 /* Initialize stdio devices */
521 /* Initialize the jump table for applications */
524 /* Initialize the console (after the relocation and devices init) */
527 #if defined(CONFIG_MISC_INIT_R)
528 /* miscellaneous platform dependent initialisations */
532 #if defined(CONFIG_CMD_KGDB)
538 debug ("U-Boot relocated to %08lx\n", dest_addr);
545 /* Must happen after interrupts are initialized since
546 * an irq handler gets installed
550 #ifdef CONFIG_STATUS_LED
551 status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
556 /* Insert function pointers now that we have relocated the code */
558 /* Initialize from environment */
559 load_addr = getenv_ulong("loadaddr", 16, load_addr);
563 #if defined(CONFIG_CMD_DOC)
569 #if defined(CONFIG_CMD_NAND)
572 nand_init(); /* go init the NAND */
575 #ifdef CONFIG_BITBANGMII
578 #if defined(CONFIG_CMD_NET)
580 #if defined(FEC_ENET)
588 post_run (NULL, POST_RAM | post_bootmode_get(0));
591 #if defined(CONFIG_CMD_PCMCIA) \
592 && !defined(CONFIG_CMD_IDE)
598 #if defined(CONFIG_CMD_IDE)
604 #ifdef CONFIG_LAST_STAGE_INIT
607 * Some parts can be only initialized if all others (like
608 * Interrupts) are up and running (i.e. the PC-style ISA
614 #if defined(CONFIG_CMD_BEDBUG)
619 #if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER)
621 * Export available size of memory for Linux,
622 * taking into account the protected RAM at top of memory
629 pram = getenv_ulong("pram", 10, CONFIG_PRAM);
631 #ifdef CONFIG_LOGBUFFER
632 /* Also take the logbuffer into account (pram is in kB) */
633 pram += (LOGBUFF_LEN+LOGBUFF_OVERHEAD)/1024;
635 sprintf (memsz, "%ldk", (bd->bi_memsize / 1024) - pram);
636 setenv ("mem", memsz);
640 #ifdef CONFIG_MODEM_SUPPORT
642 extern int do_mdm_init;
643 do_mdm_init = gd->do_mdm_init;
647 #ifdef CONFIG_WATCHDOG
648 /* disable watchdog if environment is set */
649 if ((s = getenv ("watchdog")) != NULL) {
650 if (strncmp (s, "off", 3) == 0) {
654 #endif /* CONFIG_WATCHDOG*/
657 /* Initialization complete - start the monitor */
659 /* main_loop() can return to retry autoboot, if so just run it again. */
665 /* NOTREACHED - no way out of command loop except booting */
671 puts ("### ERROR ### Please RESET the board ###\n");