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_SYS_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_SYS_I2C)
146 static int init_func_i2c (void)
149 #ifdef CONFIG_SYS_I2C
152 i2c_init (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
159 #if defined(CONFIG_HARD_SPI)
160 static int init_func_spi (void)
169 /***********************************************************************/
171 /************************************************************************
172 * Initialization sequence *
173 ************************************************************************
176 init_fnc_t *init_sequence[] = {
185 #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SYS_I2C)
188 #if defined(CONFIG_HARD_SPI)
192 #if defined(CONFIG_SYS_DRAM_TEST)
194 #endif /* CONFIG_SYS_DRAM_TEST */
195 INIT_FUNC_WATCHDOG_INIT
196 NULL, /* Terminate this list */
200 /************************************************************************
202 * This is the first part of the initialization sequence that is
203 * implemented in C, but still running from ROM.
205 * The main purpose is to provide a (serial) console interface as
206 * soon as possible (so we can see any error messages), and to
207 * initialize the RAM so that we can relocate the monitor code to
210 * Be aware of the restrictions: global data is read-only, BSS is not
211 * initialized, and stack space is limited to a few kB.
213 ************************************************************************
217 board_init_f (ulong bootflag)
220 ulong len, addr, addr_sp;
223 init_fnc_t **init_fnc_ptr;
228 /* Pointer is writable since we allocated a register for it */
229 gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
230 /* compiler optimization barrier needed for GCC >= 3.4 */
231 __asm__ __volatile__("": : :"memory");
233 /* Clear initial global data */
234 memset ((void *) gd, 0, sizeof (gd_t));
236 for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
237 if ((*init_fnc_ptr)() != 0) {
243 * Now that we have DRAM mapped and working, we can
244 * relocate the code and continue running from DRAM.
246 * Reserve memory at end of RAM for (top down in that order):
250 * - board info struct
252 len = (ulong)&__bss_end - CONFIG_SYS_MONITOR_BASE;
254 addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size;
256 #ifdef CONFIG_LOGBUFFER
257 /* reserve kernel log buffer */
258 addr -= (LOGBUFF_RESERVE);
259 debug ("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN, addr);
264 * reserve protected RAM
266 reg = getenv_ulong("pram", 10, CONFIG_PRAM);
267 addr -= (reg << 10); /* size is in kB */
268 debug ("Reserving %ldk for protected RAM at %08lx\n", reg, addr);
269 #endif /* CONFIG_PRAM */
271 /* round down to next 4 kB limit */
273 debug ("Top of RAM usable for U-Boot at: %08lx\n", addr);
276 #ifdef CONFIG_FB_ADDR
277 gd->fb_base = CONFIG_FB_ADDR;
279 /* reserve memory for LCD display (always full pages) */
280 addr = lcd_setmem (addr);
282 #endif /* CONFIG_FB_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->arch.inp_clk; /* input Freq in Hz */
358 bd->bi_vcofreq = gd->arch.vco_clk; /* vco Freq in Hz */
359 bd->bi_flbfreq = gd->arch.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)
396 char *s __maybe_unused;
399 #ifndef CONFIG_ENV_IS_NOWHERE
400 extern char * env_name_spec;
402 #ifndef CONFIG_SYS_NO_FLASH
405 gd = id; /* initialize RAM version of global data */
408 gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
412 gd->reloc_off = dest_addr - CONFIG_SYS_MONITOR_BASE;
416 debug("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
418 monitor_flash_len = (ulong)&__init_end - dest_addr;
420 #if defined(CONFIG_NEEDS_MANUAL_RELOC)
422 * We have to relocate the command table manually
424 fixup_cmdtable(ll_entry_start(cmd_tbl_t, cmd),
425 ll_entry_count(cmd_tbl_t, cmd));
426 #endif /* defined(CONFIG_NEEDS_MANUAL_RELOC) */
428 /* there are some other pointer constants we must deal with */
429 #ifndef CONFIG_ENV_IS_NOWHERE
430 env_name_spec += gd->reloc_off;
435 #ifdef CONFIG_LOGBUFFER
436 logbuff_init_ptrs ();
439 post_output_backlog ();
445 /* instruction cache enabled in cpu_init_f() for faster relocation */
446 icache_enable (); /* it's time to enable the instruction cache */
450 * Setup trap handlers
452 trap_init (CONFIG_SYS_SDRAM_BASE);
454 /* The Malloc area is immediately below the monitor copy in DRAM */
455 mem_malloc_init (CONFIG_SYS_MONITOR_BASE + gd->reloc_off -
456 TOTAL_MALLOC_LEN, TOTAL_MALLOC_LEN);
458 #if !defined(CONFIG_SYS_NO_FLASH)
461 if ((flash_size = flash_init ()) > 0) {
462 # ifdef CONFIG_SYS_FLASH_CHECKSUM
463 print_size (flash_size, "");
465 * Compute and print flash CRC if flashchecksum is set to 'y'
467 * NOTE: Maybe we should add some WATCHDOG_RESET()? XXX
469 if (getenv_yesno("flashchecksum") == 1) {
470 printf (" CRC: %08X",
472 (const unsigned char *) CONFIG_SYS_FLASH_BASE,
477 # else /* !CONFIG_SYS_FLASH_CHECKSUM */
478 print_size (flash_size, "\n");
479 # endif /* CONFIG_SYS_FLASH_CHECKSUM */
485 bd->bi_flashstart = CONFIG_SYS_FLASH_BASE; /* update start of FLASH memory */
486 bd->bi_flashsize = flash_size; /* size of FLASH memory (final value) */
487 bd->bi_flashoffset = 0;
488 #else /* CONFIG_SYS_NO_FLASH */
489 bd->bi_flashsize = 0;
490 bd->bi_flashstart = 0;
491 bd->bi_flashoffset = 0;
492 #endif /* !CONFIG_SYS_NO_FLASH */
496 /* initialize higher level parts of CPU like time base and timers */
502 # if !defined(CONFIG_ENV_IS_IN_EEPROM)
508 #if defined(CONFIG_SYS_I2C)
509 /* Adjust I2C subsystem pointers after relocation */
513 /* relocate environment function pointers etc. */
518 #if defined(CONFIG_PCI)
520 * Do pci configuration
525 /** leave this here (after malloc(), environment and PCI are working) **/
526 /* Initialize stdio devices */
529 /* Initialize the jump table for applications */
532 /* Initialize the console (after the relocation and devices init) */
535 #if defined(CONFIG_MISC_INIT_R)
536 /* miscellaneous platform dependent initialisations */
540 #if defined(CONFIG_CMD_KGDB)
546 debug ("U-Boot relocated to %08lx\n", dest_addr);
553 /* Must happen after interrupts are initialized since
554 * an irq handler gets installed
558 #ifdef CONFIG_STATUS_LED
559 status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING);
564 /* Insert function pointers now that we have relocated the code */
566 /* Initialize from environment */
567 load_addr = getenv_ulong("loadaddr", 16, load_addr);
571 #if defined(CONFIG_CMD_DOC)
577 #if defined(CONFIG_CMD_NAND)
580 nand_init(); /* go init the NAND */
583 #ifdef CONFIG_BITBANGMII
586 #if defined(CONFIG_CMD_NET)
588 #if defined(FEC_ENET)
596 post_run (NULL, POST_RAM | post_bootmode_get(0));
599 #if defined(CONFIG_CMD_PCMCIA) \
600 && !defined(CONFIG_CMD_IDE)
606 #if defined(CONFIG_CMD_IDE)
612 #ifdef CONFIG_LAST_STAGE_INIT
615 * Some parts can be only initialized if all others (like
616 * Interrupts) are up and running (i.e. the PC-style ISA
622 #if defined(CONFIG_CMD_BEDBUG)
627 #if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER)
629 * Export available size of memory for Linux,
630 * taking into account the protected RAM at top of memory
637 pram = getenv_ulong("pram", 10, CONFIG_PRAM);
639 #ifdef CONFIG_LOGBUFFER
640 /* Also take the logbuffer into account (pram is in kB) */
641 pram += (LOGBUFF_LEN+LOGBUFF_OVERHEAD)/1024;
643 sprintf (memsz, "%ldk", (bd->bi_memsize / 1024) - pram);
644 setenv ("mem", memsz);
648 #ifdef CONFIG_MODEM_SUPPORT
650 extern int do_mdm_init;
651 do_mdm_init = gd->do_mdm_init;
655 #ifdef CONFIG_WATCHDOG
656 /* disable watchdog if environment is set */
657 if ((s = getenv ("watchdog")) != NULL) {
658 if (strncmp (s, "off", 3) == 0) {
662 #endif /* CONFIG_WATCHDOG*/
665 /* Initialization complete - start the monitor */
667 /* main_loop() can return to retry autoboot, if so just run it again. */
673 /* NOTREACHED - no way out of command loop except booting */