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 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)&__bss_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_NEEDS_MANUAL_RELOC)
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_NEEDS_MANUAL_RELOC) */
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");