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;
79 extern ulong __bss_end__;
81 #if defined(CONFIG_WATCHDOG)
82 # define INIT_FUNC_WATCHDOG_INIT watchdog_init,
83 # define WATCHDOG_DISABLE watchdog_disable
85 extern int watchdog_init(void);
86 extern int watchdog_disable(void);
88 # define INIT_FUNC_WATCHDOG_INIT /* undef */
89 # define WATCHDOG_DISABLE /* undef */
90 #endif /* CONFIG_WATCHDOG */
92 ulong monitor_flash_len;
94 /************************************************************************
96 ************************************************************************
100 * All attempts to come up with a "common" initialization sequence
101 * that works for all boards and architectures failed: some of the
102 * requirements are just _too_ different. To get rid of the resulting
103 * mess of board dependend #ifdef'ed code we now make the whole
104 * initialization sequence configurable to the user.
106 * The requirements for any new initalization function is simple: it
107 * receives a pointer to the "global data" structure as it's only
108 * argument, and returns an integer return code, where 0 means
109 * "continue" and != 0 means "fatal error, hang the system".
111 typedef int (init_fnc_t) (void);
113 /************************************************************************
115 ************************************************************************
116 * Some of this code should be moved into the core functions,
117 * but let's get it working (again) first...
120 static int init_baudrate (void)
122 char tmp[64]; /* long enough for environment variables */
123 int i = getenv_f("baudrate", tmp, sizeof (tmp));
125 gd->baudrate = (i > 0)
126 ? (int) simple_strtoul (tmp, NULL, 10)
131 /***********************************************************************/
133 static int init_func_ram (void)
135 int board_type = 0; /* use dummy arg */
138 if ((gd->ram_size = initdram (board_type)) > 0) {
139 print_size (gd->ram_size, "\n");
146 /***********************************************************************/
148 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
149 static int init_func_i2c (void)
152 i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
158 #if defined(CONFIG_HARD_SPI)
159 static int init_func_spi (void)
168 /***********************************************************************/
170 /************************************************************************
171 * Initialization sequence *
172 ************************************************************************
175 init_fnc_t *init_sequence[] = {
184 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
187 #if defined(CONFIG_HARD_SPI)
191 #if defined(CONFIG_SYS_DRAM_TEST)
193 #endif /* CONFIG_SYS_DRAM_TEST */
194 INIT_FUNC_WATCHDOG_INIT
195 NULL, /* Terminate this list */
199 /************************************************************************
201 * This is the first part of the initialization sequence that is
202 * implemented in C, but still running from ROM.
204 * The main purpose is to provide a (serial) console interface as
205 * soon as possible (so we can see any error messages), and to
206 * initialize the RAM so that we can relocate the monitor code to
209 * Be aware of the restrictions: global data is read-only, BSS is not
210 * initialized, and stack space is limited to a few kB.
212 ************************************************************************
216 board_init_f (ulong bootflag)
219 ulong len, addr, addr_sp;
222 init_fnc_t **init_fnc_ptr;
226 char tmp[64]; /* long enough for environment variables */
229 /* Pointer is writable since we allocated a register for it */
230 gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
231 /* compiler optimization barrier needed for GCC >= 3.4 */
232 __asm__ __volatile__("": : :"memory");
234 /* Clear initial global data */
235 memset ((void *) gd, 0, sizeof (gd_t));
237 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
238 if ((*init_fnc_ptr)() != 0) {
244 * Now that we have DRAM mapped and working, we can
245 * relocate the code and continue running from DRAM.
247 * Reserve memory at end of RAM for (top down in that order):
251 * - board info struct
253 len = (ulong)&__bss_end__ - CONFIG_SYS_MONITOR_BASE;
255 addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size;
257 #ifdef CONFIG_LOGBUFFER
258 /* reserve kernel log buffer */
259 addr -= (LOGBUFF_RESERVE);
260 debug ("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN, addr);
265 * reserve protected RAM
267 i = getenv_f("pram", tmp, sizeof (tmp));
268 reg = (i > 0) ? simple_strtoul (tmp, NULL, 10) : CONFIG_PRAM;
269 addr -= (reg << 10); /* size is in kB */
270 debug ("Reserving %ldk for protected RAM at %08lx\n", reg, addr);
271 #endif /* CONFIG_PRAM */
273 /* round down to next 4 kB limit */
275 debug ("Top of RAM usable for U-Boot at: %08lx\n", addr);
278 #ifdef CONFIG_FB_ADDR
279 gd->fb_base = CONFIG_FB_ADDR;
281 /* reserve memory for LCD display (always full pages) */
282 addr = lcd_setmem (addr);
284 #endif /* CONFIG_FB_ADDR */
285 #endif /* CONFIG_LCD */
288 * reserve memory for U-Boot code, data & bss
289 * round down to next 4 kB limit
294 debug ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
297 * reserve memory for malloc() arena
299 addr_sp = addr - TOTAL_MALLOC_LEN;
300 debug ("Reserving %dk for malloc() at: %08lx\n",
301 TOTAL_MALLOC_LEN >> 10, addr_sp);
304 * (permanently) allocate a Board Info struct
305 * and a permanent copy of the "global" data
307 addr_sp -= sizeof (bd_t);
308 bd = (bd_t *) addr_sp;
310 debug ("Reserving %zu Bytes for Board Info at: %08lx\n",
311 sizeof (bd_t), addr_sp);
312 addr_sp -= sizeof (gd_t);
313 id = (gd_t *) addr_sp;
314 debug ("Reserving %zu Bytes for Global Data at: %08lx\n",
315 sizeof (gd_t), addr_sp);
317 /* Reserve memory for boot params. */
318 addr_sp -= CONFIG_SYS_BOOTPARAMS_LEN;
319 bd->bi_boot_params = addr_sp;
320 debug ("Reserving %dk for boot parameters at: %08lx\n",
321 CONFIG_SYS_BOOTPARAMS_LEN >> 10, addr_sp);
324 * Finally, we set up a new (bigger) stack.
326 * Leave some safety gap for SP, force alignment on 16 byte boundary
327 * Clear initial stack frame
332 paddr = (ulong *)addr_sp;
335 addr_sp = (ulong)paddr;
337 debug ("Stack Pointer at: %08lx\n", addr_sp);
340 * Save local variables to board info struct
342 bd->bi_memstart = CONFIG_SYS_SDRAM_BASE; /* start of DRAM memory */
343 bd->bi_memsize = gd->ram_size; /* size of DRAM memory in bytes */
344 #ifdef CONFIG_SYS_INIT_RAM_ADDR
345 bd->bi_sramstart = CONFIG_SYS_INIT_RAM_ADDR; /* start of SRAM memory */
346 bd->bi_sramsize = CONFIG_SYS_INIT_RAM_SIZE; /* size of SRAM memory */
348 bd->bi_mbar_base = CONFIG_SYS_MBAR; /* base of internal registers */
350 bd->bi_bootflags = bootflag; /* boot / reboot flag (for LynxOS) */
353 bd->bi_intfreq = gd->cpu_clk; /* Internal Freq, in Hz */
354 bd->bi_busfreq = gd->bus_clk; /* Bus Freq, in Hz */
356 bd->bi_pcifreq = gd->pci_clk; /* PCI Freq in Hz */
358 #ifdef CONFIG_EXTRA_CLOCK
359 bd->bi_inpfreq = gd->inp_clk; /* input Freq in Hz */
360 bd->bi_vcofreq = gd->vco_clk; /* vco Freq in Hz */
361 bd->bi_flbfreq = gd->flb_clk; /* flexbus Freq in Hz */
363 bd->bi_baudrate = gd->baudrate; /* Console Baudrate */
365 #ifdef CONFIG_SYS_EXTBDINFO
366 strncpy (bd->bi_s_version, "1.2", sizeof (bd->bi_s_version));
367 strncpy (bd->bi_r_version, U_BOOT_VERSION, sizeof (bd->bi_r_version));
373 post_bootmode_init();
374 post_run (NULL, POST_ROM | post_bootmode_get(0));
379 memcpy (id, (void *)gd, sizeof (gd_t));
381 debug ("Start relocate of code from %08x to %08lx\n", CONFIG_SYS_MONITOR_BASE, addr);
382 relocate_code (addr_sp, id, addr);
384 /* NOTREACHED - jump_to_ram() does not return */
387 /************************************************************************
389 * This is the next part if the initialization sequence: we are now
390 * running from RAM and have a "normal" C environment, i. e. global
391 * data can be written, BSS has been cleared, the stack size in not
392 * that critical any more, etc.
394 ************************************************************************
396 void board_init_r (gd_t *id, ulong dest_addr)
400 extern void malloc_bin_reloc (void);
402 #ifndef CONFIG_ENV_IS_NOWHERE
403 extern char * env_name_spec;
405 #ifndef CONFIG_SYS_NO_FLASH
408 gd = id; /* initialize RAM version of global data */
411 gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
413 #ifdef CONFIG_SERIAL_MULTI
417 debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
421 gd->reloc_off = dest_addr - CONFIG_SYS_MONITOR_BASE;
423 monitor_flash_len = (ulong)&__init_end - dest_addr;
425 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
427 * We have to relocate the command table manually
429 fixup_cmdtable(&__u_boot_cmd_start,
430 (ulong)(&__u_boot_cmd_end - &__u_boot_cmd_start));
431 #endif /* defined(CONFIG_NEEDS_MANUAL_RELOC) */
433 /* there are some other pointer constants we must deal with */
434 #ifndef CONFIG_ENV_IS_NOWHERE
435 env_name_spec += gd->reloc_off;
440 #ifdef CONFIG_LOGBUFFER
441 logbuff_init_ptrs ();
444 post_output_backlog ();
450 /* instruction cache enabled in cpu_init_f() for faster relocation */
451 icache_enable (); /* it's time to enable the instruction cache */
455 * Setup trap handlers
457 trap_init (CONFIG_SYS_SDRAM_BASE);
459 /* The Malloc area is immediately below the monitor copy in DRAM */
460 mem_malloc_init (CONFIG_SYS_MONITOR_BASE + gd->reloc_off -
461 TOTAL_MALLOC_LEN, TOTAL_MALLOC_LEN);
464 #if !defined(CONFIG_SYS_NO_FLASH)
467 if ((flash_size = flash_init ()) > 0) {
468 # ifdef CONFIG_SYS_FLASH_CHECKSUM
469 print_size (flash_size, "");
471 * Compute and print flash CRC if flashchecksum is set to 'y'
473 * NOTE: Maybe we should add some WATCHDOG_RESET()? XXX
475 s = getenv ("flashchecksum");
476 if (s && (*s == 'y')) {
477 printf (" CRC: %08X",
479 (const unsigned char *) CONFIG_SYS_FLASH_BASE,
484 # else /* !CONFIG_SYS_FLASH_CHECKSUM */
485 print_size (flash_size, "\n");
486 # endif /* CONFIG_SYS_FLASH_CHECKSUM */
492 bd->bi_flashstart = CONFIG_SYS_FLASH_BASE; /* update start of FLASH memory */
493 bd->bi_flashsize = flash_size; /* size of FLASH memory (final value) */
494 bd->bi_flashoffset = 0;
495 #else /* CONFIG_SYS_NO_FLASH */
496 bd->bi_flashsize = 0;
497 bd->bi_flashstart = 0;
498 bd->bi_flashoffset = 0;
499 #endif /* !CONFIG_SYS_NO_FLASH */
503 /* initialize higher level parts of CPU like time base and timers */
509 # if !defined(CONFIG_ENV_IS_IN_EEPROM)
515 /* relocate environment function pointers etc. */
519 * Fill in missing fields of bd_info.
520 * We do this here, where we have "normal" access to the
521 * environment; we used to do this still running from ROM,
522 * where had to use getenv_f(), which can be pretty slow when
523 * the environment is in EEPROM.
525 bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
529 #if defined(CONFIG_PCI)
531 * Do pci configuration
536 /** leave this here (after malloc(), environment and PCI are working) **/
537 /* Initialize stdio devices */
540 /* Initialize the jump table for applications */
543 /* Initialize the console (after the relocation and devices init) */
546 #if defined(CONFIG_MISC_INIT_R)
547 /* miscellaneous platform dependent initialisations */
551 #if defined(CONFIG_CMD_KGDB)
557 debug ("U-Boot relocated to %08lx\n", dest_addr);
564 /* Must happen after interrupts are initialized since
565 * an irq handler gets installed
569 #ifdef CONFIG_STATUS_LED
570 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)
614 post_run (NULL, POST_RAM | post_bootmode_get(0));
617 #if defined(CONFIG_CMD_PCMCIA) \
618 && !defined(CONFIG_CMD_IDE)
624 #if defined(CONFIG_CMD_IDE)
630 #ifdef CONFIG_LAST_STAGE_INIT
633 * Some parts can be only initialized if all others (like
634 * Interrupts) are up and running (i.e. the PC-style ISA
640 #if defined(CONFIG_CMD_BEDBUG)
645 #if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER)
647 * Export available size of memory for Linux,
648 * taking into account the protected RAM at top of memory
656 if ((s = getenv ("pram")) != NULL) {
657 pram = simple_strtoul (s, NULL, 10);
664 #ifdef CONFIG_LOGBUFFER
665 /* Also take the logbuffer into account (pram is in kB) */
666 pram += (LOGBUFF_LEN+LOGBUFF_OVERHEAD)/1024;
668 sprintf (memsz, "%ldk", (bd->bi_memsize / 1024) - pram);
669 setenv ("mem", memsz);
673 #ifdef CONFIG_MODEM_SUPPORT
675 extern int do_mdm_init;
676 do_mdm_init = gd->do_mdm_init;
680 #ifdef CONFIG_WATCHDOG
681 /* disable watchdog if environment is set */
682 if ((s = getenv ("watchdog")) != NULL) {
683 if (strncmp (s, "off", 3) == 0) {
687 #endif /* CONFIG_WATCHDOG*/
690 /* Initialization complete - start the monitor */
692 /* main_loop() can return to retry autoboot, if so just run it again. */
698 /* NOTREACHED - no way out of command loop except booting */
704 puts ("### ERROR ### Please RESET the board ###\n");