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 gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE);
126 /***********************************************************************/
128 static int init_func_ram (void)
130 int board_type = 0; /* use dummy arg */
133 if ((gd->ram_size = initdram (board_type)) > 0) {
134 print_size (gd->ram_size, "\n");
141 /***********************************************************************/
143 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
144 static int init_func_i2c (void)
147 i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
153 #if defined(CONFIG_HARD_SPI)
154 static int init_func_spi (void)
163 /***********************************************************************/
165 /************************************************************************
166 * Initialization sequence *
167 ************************************************************************
170 init_fnc_t *init_sequence[] = {
179 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C)
182 #if defined(CONFIG_HARD_SPI)
186 #if defined(CONFIG_SYS_DRAM_TEST)
188 #endif /* CONFIG_SYS_DRAM_TEST */
189 INIT_FUNC_WATCHDOG_INIT
190 NULL, /* Terminate this list */
194 /************************************************************************
196 * This is the first part of the initialization sequence that is
197 * implemented in C, but still running from ROM.
199 * The main purpose is to provide a (serial) console interface as
200 * soon as possible (so we can see any error messages), and to
201 * initialize the RAM so that we can relocate the monitor code to
204 * Be aware of the restrictions: global data is read-only, BSS is not
205 * initialized, and stack space is limited to a few kB.
207 ************************************************************************
211 board_init_f (ulong bootflag)
214 ulong len, addr, addr_sp;
217 init_fnc_t **init_fnc_ptr;
222 /* Pointer is writable since we allocated a register for it */
223 gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
224 /* compiler optimization barrier needed for GCC >= 3.4 */
225 __asm__ __volatile__("": : :"memory");
227 /* Clear initial global data */
228 memset ((void *) gd, 0, sizeof (gd_t));
230 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
231 if ((*init_fnc_ptr)() != 0) {
237 * Now that we have DRAM mapped and working, we can
238 * relocate the code and continue running from DRAM.
240 * Reserve memory at end of RAM for (top down in that order):
244 * - board info struct
246 len = (ulong)&__bss_end__ - CONFIG_SYS_MONITOR_BASE;
248 addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size;
250 #ifdef CONFIG_LOGBUFFER
251 /* reserve kernel log buffer */
252 addr -= (LOGBUFF_RESERVE);
253 debug ("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN, addr);
258 * reserve protected RAM
260 reg = getenv_ulong("pram", 10, CONFIG_PRAM);
261 addr -= (reg << 10); /* size is in kB */
262 debug ("Reserving %ldk for protected RAM at %08lx\n", reg, addr);
263 #endif /* CONFIG_PRAM */
265 /* round down to next 4 kB limit */
267 debug ("Top of RAM usable for U-Boot at: %08lx\n", addr);
270 #ifdef CONFIG_FB_ADDR
271 gd->fb_base = CONFIG_FB_ADDR;
273 /* reserve memory for LCD display (always full pages) */
274 addr = lcd_setmem (addr);
276 #endif /* CONFIG_FB_ADDR */
277 #endif /* CONFIG_LCD */
280 * reserve memory for U-Boot code, data & bss
281 * round down to next 4 kB limit
286 debug ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
289 * reserve memory for malloc() arena
291 addr_sp = addr - TOTAL_MALLOC_LEN;
292 debug ("Reserving %dk for malloc() at: %08lx\n",
293 TOTAL_MALLOC_LEN >> 10, addr_sp);
296 * (permanently) allocate a Board Info struct
297 * and a permanent copy of the "global" data
299 addr_sp -= sizeof (bd_t);
300 bd = (bd_t *) addr_sp;
302 debug ("Reserving %zu Bytes for Board Info at: %08lx\n",
303 sizeof (bd_t), addr_sp);
304 addr_sp -= sizeof (gd_t);
305 id = (gd_t *) addr_sp;
306 debug ("Reserving %zu Bytes for Global Data at: %08lx\n",
307 sizeof (gd_t), addr_sp);
309 /* Reserve memory for boot params. */
310 addr_sp -= CONFIG_SYS_BOOTPARAMS_LEN;
311 bd->bi_boot_params = addr_sp;
312 debug ("Reserving %dk for boot parameters at: %08lx\n",
313 CONFIG_SYS_BOOTPARAMS_LEN >> 10, addr_sp);
316 * Finally, we set up a new (bigger) stack.
318 * Leave some safety gap for SP, force alignment on 16 byte boundary
319 * Clear initial stack frame
324 paddr = (ulong *)addr_sp;
327 addr_sp = (ulong)paddr;
329 debug ("Stack Pointer at: %08lx\n", addr_sp);
332 * Save local variables to board info struct
334 bd->bi_memstart = CONFIG_SYS_SDRAM_BASE; /* start of DRAM memory */
335 bd->bi_memsize = gd->ram_size; /* size of DRAM memory in bytes */
336 #ifdef CONFIG_SYS_INIT_RAM_ADDR
337 bd->bi_sramstart = CONFIG_SYS_INIT_RAM_ADDR; /* start of SRAM memory */
338 bd->bi_sramsize = CONFIG_SYS_INIT_RAM_SIZE; /* size of SRAM memory */
340 bd->bi_mbar_base = CONFIG_SYS_MBAR; /* base of internal registers */
342 bd->bi_bootflags = bootflag; /* boot / reboot flag (for LynxOS) */
345 bd->bi_intfreq = gd->cpu_clk; /* Internal Freq, in Hz */
346 bd->bi_busfreq = gd->bus_clk; /* Bus Freq, in Hz */
348 bd->bi_pcifreq = gd->pci_clk; /* PCI Freq in Hz */
350 #ifdef CONFIG_EXTRA_CLOCK
351 bd->bi_inpfreq = gd->inp_clk; /* input Freq in Hz */
352 bd->bi_vcofreq = gd->vco_clk; /* vco Freq in Hz */
353 bd->bi_flbfreq = gd->flb_clk; /* flexbus Freq in Hz */
355 bd->bi_baudrate = gd->baudrate; /* Console Baudrate */
357 #ifdef CONFIG_SYS_EXTBDINFO
358 strncpy (bd->bi_s_version, "1.2", sizeof (bd->bi_s_version));
359 strncpy (bd->bi_r_version, U_BOOT_VERSION, sizeof (bd->bi_r_version));
365 post_bootmode_init();
366 post_run (NULL, POST_ROM | post_bootmode_get(0));
371 memcpy (id, (void *)gd, sizeof (gd_t));
373 debug ("Start relocate of code from %08x to %08lx\n", CONFIG_SYS_MONITOR_BASE, addr);
374 relocate_code (addr_sp, id, addr);
376 /* NOTREACHED - jump_to_ram() does not return */
379 /************************************************************************
381 * This is the next part if the initialization sequence: we are now
382 * running from RAM and have a "normal" C environment, i. e. global
383 * data can be written, BSS has been cleared, the stack size in not
384 * that critical any more, etc.
386 ************************************************************************
388 void board_init_r (gd_t *id, ulong dest_addr)
393 #ifndef CONFIG_ENV_IS_NOWHERE
394 extern char * env_name_spec;
396 #ifndef CONFIG_SYS_NO_FLASH
399 gd = id; /* initialize RAM version of global data */
402 gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
406 debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
410 gd->reloc_off = dest_addr - CONFIG_SYS_MONITOR_BASE;
412 monitor_flash_len = (ulong)&__init_end - dest_addr;
414 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
416 * We have to relocate the command table manually
418 fixup_cmdtable(&__u_boot_cmd_start,
419 (ulong)(&__u_boot_cmd_end - &__u_boot_cmd_start));
420 #endif /* defined(CONFIG_NEEDS_MANUAL_RELOC) */
422 /* there are some other pointer constants we must deal with */
423 #ifndef CONFIG_ENV_IS_NOWHERE
424 env_name_spec += gd->reloc_off;
429 #ifdef CONFIG_LOGBUFFER
430 logbuff_init_ptrs ();
433 post_output_backlog ();
439 /* instruction cache enabled in cpu_init_f() for faster relocation */
440 icache_enable (); /* it's time to enable the instruction cache */
444 * Setup trap handlers
446 trap_init (CONFIG_SYS_SDRAM_BASE);
448 /* The Malloc area is immediately below the monitor copy in DRAM */
449 mem_malloc_init (CONFIG_SYS_MONITOR_BASE + gd->reloc_off -
450 TOTAL_MALLOC_LEN, TOTAL_MALLOC_LEN);
453 #if !defined(CONFIG_SYS_NO_FLASH)
456 if ((flash_size = flash_init ()) > 0) {
457 # ifdef CONFIG_SYS_FLASH_CHECKSUM
458 print_size (flash_size, "");
460 * Compute and print flash CRC if flashchecksum is set to 'y'
462 * NOTE: Maybe we should add some WATCHDOG_RESET()? XXX
464 s = getenv ("flashchecksum");
465 if (s && (*s == 'y')) {
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");