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 # undef INIT_FUNC_WATCHDOG_INIT
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 gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE);
128 /***********************************************************************/
130 static int init_func_ram (void)
132 int board_type = 0; /* use dummy arg */
135 if ((gd->ram_size = initdram (board_type)) > 0) {
136 print_size (gd->ram_size, "\n");
143 /***********************************************************************/
145 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C) || \
146 defined(CONFIG_SYS_I2C)
147 static int init_func_i2c (void)
150 #ifdef CONFIG_SYS_I2C
153 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) || \
187 defined(CONFIG_SYS_I2C)
190 #if defined(CONFIG_HARD_SPI)
194 #if defined(CONFIG_SYS_DRAM_TEST)
196 #endif /* CONFIG_SYS_DRAM_TEST */
197 INIT_FUNC_WATCHDOG_INIT
198 NULL, /* Terminate this list */
202 /************************************************************************
204 * This is the first part of the initialization sequence that is
205 * implemented in C, but still running from ROM.
207 * The main purpose is to provide a (serial) console interface as
208 * soon as possible (so we can see any error messages), and to
209 * initialize the RAM so that we can relocate the monitor code to
212 * Be aware of the restrictions: global data is read-only, BSS is not
213 * initialized, and stack space is limited to a few kB.
215 ************************************************************************
219 board_init_f (ulong bootflag)
222 ulong len, addr, addr_sp;
225 init_fnc_t **init_fnc_ptr;
230 /* Pointer is writable since we allocated a register for it */
231 gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
232 /* compiler optimization barrier needed for GCC >= 3.4 */
233 __asm__ __volatile__("": : :"memory");
235 /* Clear initial global data */
236 memset ((void *) gd, 0, sizeof (gd_t));
238 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
239 if ((*init_fnc_ptr)() != 0) {
245 * Now that we have DRAM mapped and working, we can
246 * relocate the code and continue running from DRAM.
248 * Reserve memory at end of RAM for (top down in that order):
252 * - board info struct
254 len = (ulong)&__bss_end - CONFIG_SYS_MONITOR_BASE;
256 addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size;
258 #ifdef CONFIG_LOGBUFFER
259 /* reserve kernel log buffer */
260 addr -= (LOGBUFF_RESERVE);
261 debug ("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN, addr);
266 * reserve protected RAM
268 reg = getenv_ulong("pram", 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->arch.inp_clk; /* input Freq in Hz */
360 bd->bi_vcofreq = gd->arch.vco_clk; /* vco Freq in Hz */
361 bd->bi_flbfreq = gd->arch.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)
398 char *s __maybe_unused;
401 #ifndef CONFIG_ENV_IS_NOWHERE
402 extern char * env_name_spec;
404 #ifndef CONFIG_SYS_NO_FLASH
407 gd = id; /* initialize RAM version of global data */
410 gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
414 gd->reloc_off = dest_addr - CONFIG_SYS_MONITOR_BASE;
418 debug("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
420 monitor_flash_len = (ulong)&__init_end - dest_addr;
422 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
424 * We have to relocate the command table manually
426 fixup_cmdtable(ll_entry_start(cmd_tbl_t, cmd),
427 ll_entry_count(cmd_tbl_t, cmd));
428 #endif /* defined(CONFIG_NEEDS_MANUAL_RELOC) */
430 /* there are some other pointer constants we must deal with */
431 #ifndef CONFIG_ENV_IS_NOWHERE
432 env_name_spec += gd->reloc_off;
437 #ifdef CONFIG_LOGBUFFER
438 logbuff_init_ptrs ();
441 post_output_backlog ();
447 /* instruction cache enabled in cpu_init_f() for faster relocation */
448 icache_enable (); /* it's time to enable the instruction cache */
452 * Setup trap handlers
454 trap_init (CONFIG_SYS_SDRAM_BASE);
456 /* The Malloc area is immediately below the monitor copy in DRAM */
457 mem_malloc_init (CONFIG_SYS_MONITOR_BASE + gd->reloc_off -
458 TOTAL_MALLOC_LEN, TOTAL_MALLOC_LEN);
460 #if !defined(CONFIG_SYS_NO_FLASH)
463 if ((flash_size = flash_init ()) > 0) {
464 # ifdef CONFIG_SYS_FLASH_CHECKSUM
465 print_size (flash_size, "");
467 * Compute and print flash CRC if flashchecksum is set to 'y'
469 * NOTE: Maybe we should add some WATCHDOG_RESET()? XXX
471 if (getenv_yesno("flashchecksum") == 1) {
472 printf (" CRC: %08X",
474 (const unsigned char *) CONFIG_SYS_FLASH_BASE,
479 # else /* !CONFIG_SYS_FLASH_CHECKSUM */
480 print_size (flash_size, "\n");
481 # endif /* CONFIG_SYS_FLASH_CHECKSUM */
487 bd->bi_flashstart = CONFIG_SYS_FLASH_BASE; /* update start of FLASH memory */
488 bd->bi_flashsize = flash_size; /* size of FLASH memory (final value) */
489 bd->bi_flashoffset = 0;
490 #else /* CONFIG_SYS_NO_FLASH */
491 bd->bi_flashsize = 0;
492 bd->bi_flashstart = 0;
493 bd->bi_flashoffset = 0;
494 #endif /* !CONFIG_SYS_NO_FLASH */
498 /* initialize higher level parts of CPU like time base and timers */
504 # if !defined(CONFIG_ENV_IS_IN_EEPROM)
510 #if defined(CONFIG_SYS_I2C)
511 /* Adjust I2C subsystem pointers after relocation */
515 /* relocate environment function pointers etc. */
520 #if defined(CONFIG_PCI)
522 * Do pci configuration
527 /** leave this here (after malloc(), environment and PCI are working) **/
528 /* Initialize stdio devices */
531 /* Initialize the jump table for applications */
534 /* Initialize the console (after the relocation and devices init) */
537 #if defined(CONFIG_MISC_INIT_R)
538 /* miscellaneous platform dependent initialisations */
542 #if defined(CONFIG_CMD_KGDB)
548 debug ("U-Boot relocated to %08lx\n", dest_addr);
555 /* Must happen after interrupts are initialized since
556 * an irq handler gets installed
560 #ifdef CONFIG_STATUS_LED
561 status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
566 /* Insert function pointers now that we have relocated the code */
568 /* Initialize from environment */
569 load_addr = getenv_ulong("loadaddr", 16, load_addr);
573 #if defined(CONFIG_CMD_DOC)
579 #if defined(CONFIG_CMD_NAND)
582 nand_init(); /* go init the NAND */
585 #ifdef CONFIG_BITBANGMII
588 #if defined(CONFIG_CMD_NET)
590 #if defined(FEC_ENET)
598 post_run (NULL, POST_RAM | post_bootmode_get(0));
601 #if defined(CONFIG_CMD_PCMCIA) \
602 && !defined(CONFIG_CMD_IDE)
608 #if defined(CONFIG_CMD_IDE)
614 #ifdef CONFIG_LAST_STAGE_INIT
617 * Some parts can be only initialized if all others (like
618 * Interrupts) are up and running (i.e. the PC-style ISA
624 #if defined(CONFIG_CMD_BEDBUG)
629 #if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER)
631 * Export available size of memory for Linux,
632 * taking into account the protected RAM at top of memory
639 pram = getenv_ulong("pram", 10, CONFIG_PRAM);
641 #ifdef CONFIG_LOGBUFFER
642 /* Also take the logbuffer into account (pram is in kB) */
643 pram += (LOGBUFF_LEN+LOGBUFF_OVERHEAD)/1024;
645 sprintf (memsz, "%ldk", (bd->bi_memsize / 1024) - pram);
646 setenv ("mem", memsz);
650 #ifdef CONFIG_MODEM_SUPPORT
652 extern int do_mdm_init;
653 do_mdm_init = gd->do_mdm_init;
657 #ifdef CONFIG_WATCHDOG
658 /* disable watchdog if environment is set */
659 if ((s = getenv ("watchdog")) != NULL) {
660 if (strncmp (s, "off", 3) == 0) {
664 #endif /* CONFIG_WATCHDOG*/
667 /* Initialization complete - start the monitor */
669 /* main_loop() can return to retry autoboot, if so just run it again. */
675 /* NOTREACHED - no way out of command loop except booting */