/* * (C) Copyright 2003 * Josef Baumgartner * * (C) Copyright 2000-2002 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * See file CREDITS for list of people who contributed to this * project. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA */ #include #include #include #include #include #ifdef CONFIG_M5272 #include #endif #if (CONFIG_COMMANDS & CFG_CMD_IDE) #include #endif #if (CONFIG_COMMANDS & CFG_CMD_SCSI) #include #endif #if (CONFIG_COMMANDS & CFG_CMD_KGDB) #include #endif #ifdef CONFIG_STATUS_LED #include #endif #include #if (CONFIG_COMMANDS & CFG_CMD_BEDBUG) #include #endif #ifdef CFG_ALLOC_DPRAM #include #endif #include #if defined(CONFIG_HARD_I2C) || \ defined(CONFIG_SOFT_I2C) #include #endif DECLARE_GLOBAL_DATA_PTR; static char *failed = "*** failed ***\n"; #ifdef CONFIG_PCU_E extern flash_info_t flash_info[]; #endif #include #if ( ((CFG_ENV_ADDR+CFG_ENV_SIZE) < CFG_MONITOR_BASE) || \ (CFG_ENV_ADDR >= (CFG_MONITOR_BASE + CFG_MONITOR_LEN)) ) || \ defined(CFG_ENV_IS_IN_NVRAM) #define TOTAL_MALLOC_LEN (CFG_MALLOC_LEN + CFG_ENV_SIZE) #else #define TOTAL_MALLOC_LEN CFG_MALLOC_LEN #endif extern ulong __init_end; extern ulong _end; extern void timer_init(void); #if defined(CONFIG_WATCHDOG) # define INIT_FUNC_WATCHDOG_INIT watchdog_init, # define WATCHDOG_DISABLE watchdog_disable extern int watchdog_init(void); extern int watchdog_disable(void); #else # define INIT_FUNC_WATCHDOG_INIT /* undef */ # define WATCHDOG_DISABLE /* undef */ #endif /* CONFIG_WATCHDOG */ ulong monitor_flash_len; /* * Begin and End of memory area for malloc(), and current "brk" */ static ulong mem_malloc_start = 0; static ulong mem_malloc_end = 0; static ulong mem_malloc_brk = 0; /************************************************************************ * Utilities * ************************************************************************ */ /* * The Malloc area is immediately below the monitor copy in DRAM */ static void mem_malloc_init (void) { ulong dest_addr = CFG_MONITOR_BASE + gd->reloc_off; mem_malloc_end = dest_addr; mem_malloc_start = dest_addr - TOTAL_MALLOC_LEN; mem_malloc_brk = mem_malloc_start; memset ((void *) mem_malloc_start, 0, mem_malloc_end - mem_malloc_start); } void *sbrk (ptrdiff_t increment) { ulong old = mem_malloc_brk; ulong new = old + increment; if ((new < mem_malloc_start) || (new > mem_malloc_end) ) { return (NULL); } mem_malloc_brk = new; return ((void *)old); } char *strmhz(char *buf, long hz) { long l, n; long m; n = hz / 1000000L; l = sprintf (buf, "%ld", n); m = (hz % 1000000L) / 1000L; if (m != 0) sprintf (buf+l, ".%03ld", m); return (buf); } /* * All attempts to come up with a "common" initialization sequence * that works for all boards and architectures failed: some of the * requirements are just _too_ different. To get rid of the resulting * mess of board dependend #ifdef'ed code we now make the whole * initialization sequence configurable to the user. * * The requirements for any new initalization function is simple: it * receives a pointer to the "global data" structure as it's only * argument, and returns an integer return code, where 0 means * "continue" and != 0 means "fatal error, hang the system". */ typedef int (init_fnc_t) (void); /************************************************************************ * Init Utilities * ************************************************************************ * Some of this code should be moved into the core functions, * but let's get it working (again) first... */ static int init_baudrate (void) { uchar tmp[64]; /* long enough for environment variables */ int i = getenv_r ("baudrate", tmp, sizeof (tmp)); gd->baudrate = (i > 0) ? (int) simple_strtoul (tmp, NULL, 10) : CONFIG_BAUDRATE; return (0); } /***********************************************************************/ static int init_func_ram (void) { int board_type = 0; /* use dummy arg */ puts ("DRAM: "); if ((gd->ram_size = initdram (board_type)) > 0) { print_size (gd->ram_size, "\n"); return (0); } puts (failed); return (1); } /***********************************************************************/ #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C) static int init_func_i2c (void) { puts ("I2C: "); i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE); puts ("ready\n"); return (0); } #endif /***********************************************************************/ /************************************************************************ * Initialization sequence * ************************************************************************ */ init_fnc_t *init_sequence[] = { env_init, init_baudrate, serial_init, console_init_f, display_options, checkcpu, checkboard, #if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C) init_func_i2c, #endif init_func_ram, #if defined(CFG_DRAM_TEST) testdram, #endif /* CFG_DRAM_TEST */ INIT_FUNC_WATCHDOG_INIT NULL, /* Terminate this list */ }; /************************************************************************ * * This is the first part of the initialization sequence that is * implemented in C, but still running from ROM. * * The main purpose is to provide a (serial) console interface as * soon as possible (so we can see any error messages), and to * initialize the RAM so that we can relocate the monitor code to * RAM. * * Be aware of the restrictions: global data is read-only, BSS is not * initialized, and stack space is limited to a few kB. * ************************************************************************ */ void board_init_f (ulong bootflag) { bd_t *bd; ulong len, addr, addr_sp; ulong *paddr; gd_t *id; init_fnc_t **init_fnc_ptr; #ifdef CONFIG_PRAM int i; ulong reg; uchar tmp[64]; /* long enough for environment variables */ #endif /* Pointer is writable since we allocated a register for it */ gd = (gd_t *) (CFG_INIT_RAM_ADDR + CFG_GBL_DATA_OFFSET); /* compiler optimization barrier needed for GCC >= 3.4 */ __asm__ __volatile__("": : :"memory"); /* Clear initial global data */ memset ((void *) gd, 0, sizeof (gd_t)); for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) { if ((*init_fnc_ptr)() != 0) { hang (); } } /* * Now that we have DRAM mapped and working, we can * relocate the code and continue running from DRAM. * * Reserve memory at end of RAM for (top down in that order): * - protected RAM * - LCD framebuffer * - monitor code * - board info struct */ len = (ulong)&_end - CFG_MONITOR_BASE; addr = CFG_SDRAM_BASE + gd->ram_size; #ifdef CONFIG_LOGBUFFER /* reserve kernel log buffer */ addr -= (LOGBUFF_RESERVE); debug ("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN, addr); #endif #ifdef CONFIG_PRAM /* * reserve protected RAM */ i = getenv_r ("pram", tmp, sizeof (tmp)); reg = (i > 0) ? simple_strtoul (tmp, NULL, 10) : CONFIG_PRAM; addr -= (reg << 10); /* size is in kB */ debug ("Reserving %ldk for protected RAM at %08lx\n", reg, addr); #endif /* CONFIG_PRAM */ /* * reserve memory for U-Boot code, data & bss * round down to next 4 kB limit */ addr -= len; addr &= ~(4096 - 1); debug ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr); /* * reserve memory for malloc() arena */ addr_sp = addr - TOTAL_MALLOC_LEN; debug ("Reserving %dk for malloc() at: %08lx\n", TOTAL_MALLOC_LEN >> 10, addr_sp); /* * (permanently) allocate a Board Info struct * and a permanent copy of the "global" data */ addr_sp -= sizeof (bd_t); bd = (bd_t *) addr_sp; gd->bd = bd; debug ("Reserving %d Bytes for Board Info at: %08lx\n", sizeof (bd_t), addr_sp); addr_sp -= sizeof (gd_t); id = (gd_t *) addr_sp; debug ("Reserving %d Bytes for Global Data at: %08lx\n", sizeof (gd_t), addr_sp); /* Reserve memory for boot params. */ addr_sp -= CFG_BOOTPARAMS_LEN; bd->bi_boot_params = addr_sp; debug ("Reserving %dk for boot parameters at: %08lx\n", CFG_BOOTPARAMS_LEN >> 10, addr_sp); /* * Finally, we set up a new (bigger) stack. * * Leave some safety gap for SP, force alignment on 16 byte boundary * Clear initial stack frame */ addr_sp -= 16; addr_sp &= ~0xF; paddr = (ulong *)addr_sp; *paddr-- = 0; *paddr-- = 0; addr_sp = (ulong)paddr; debug ("Stack Pointer at: %08lx\n", addr_sp); /* * Save local variables to board info struct */ bd->bi_memstart = CFG_SDRAM_BASE; /* start of DRAM memory */ bd->bi_memsize = gd->ram_size; /* size of DRAM memory in bytes */ bd->bi_mbar_base = CFG_MBAR; /* base of internal registers */ bd->bi_bootflags = bootflag; /* boot / reboot flag (for LynxOS) */ WATCHDOG_RESET (); bd->bi_intfreq = gd->cpu_clk; /* Internal Freq, in Hz */ bd->bi_busfreq = gd->bus_clk; /* Bus Freq, in Hz */ bd->bi_baudrate = gd->baudrate; /* Console Baudrate */ #ifdef CFG_EXTBDINFO strncpy (bd->bi_s_version, "1.2", sizeof (bd->bi_s_version)); strncpy (bd->bi_r_version, U_BOOT_VERSION, sizeof (bd->bi_r_version)); #endif WATCHDOG_RESET (); #ifdef CONFIG_POST post_bootmode_init(); post_run (NULL, POST_ROM | post_bootmode_get(0)); #endif WATCHDOG_RESET(); memcpy (id, (void *)gd, sizeof (gd_t)); debug ("Start relocate of code from %08x to %08lx\n", CFG_MONITOR_BASE, addr); relocate_code (addr_sp, id, addr); /* NOTREACHED - jump_to_ram() does not return */ } /************************************************************************ * * This is the next part if the initialization sequence: we are now * running from RAM and have a "normal" C environment, i. e. global * data can be written, BSS has been cleared, the stack size in not * that critical any more, etc. * ************************************************************************ */ void board_init_r (gd_t *id, ulong dest_addr) { cmd_tbl_t *cmdtp; char *s, *e; bd_t *bd; int i; extern void malloc_bin_reloc (void); #ifndef CFG_ENV_IS_NOWHERE extern char * env_name_spec; #endif #ifndef CFG_NO_FLASH ulong flash_size; #endif gd = id; /* initialize RAM version of global data */ bd = gd->bd; gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */ debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr); WATCHDOG_RESET (); gd->reloc_off = dest_addr - CFG_MONITOR_BASE; monitor_flash_len = (ulong)&__init_end - dest_addr; /* * We have to relocate the command table manually */ for (cmdtp = &__u_boot_cmd_start; cmdtp != &__u_boot_cmd_end; cmdtp++) { ulong addr; addr = (ulong) (cmdtp->cmd) + gd->reloc_off; #if 0 printf ("Command \"%s\": 0x%08lx => 0x%08lx\n", cmdtp->name, (ulong) (cmdtp->cmd), addr); #endif cmdtp->cmd = (int (*)(struct cmd_tbl_s *, int, int, char *[]))addr; addr = (ulong)(cmdtp->name) + gd->reloc_off; cmdtp->name = (char *)addr; if (cmdtp->usage) { addr = (ulong)(cmdtp->usage) + gd->reloc_off; cmdtp->usage = (char *)addr; } #ifdef CFG_LONGHELP if (cmdtp->help) { addr = (ulong)(cmdtp->help) + gd->reloc_off; cmdtp->help = (char *)addr; } #endif } /* there are some other pointer constants we must deal with */ #ifndef CFG_ENV_IS_NOWHERE env_name_spec += gd->reloc_off; #endif WATCHDOG_RESET (); #ifdef CONFIG_LOGBUFFER logbuff_init_ptrs (); #endif #ifdef CONFIG_POST post_output_backlog (); post_reloc (); #endif WATCHDOG_RESET(); #if 0 /* instruction cache enabled in cpu_init_f() for faster relocation */ icache_enable (); /* it's time to enable the instruction cache */ #endif /* * Setup trap handlers */ trap_init (0); #if !defined(CFG_NO_FLASH) puts ("FLASH: "); if ((flash_size = flash_init ()) > 0) { # ifdef CFG_FLASH_CHECKSUM print_size (flash_size, ""); /* * Compute and print flash CRC if flashchecksum is set to 'y' * * NOTE: Maybe we should add some WATCHDOG_RESET()? XXX */ s = getenv ("flashchecksum"); if (s && (*s == 'y')) { printf (" CRC: %08lX", crc32 (0, (const unsigned char *) CFG_FLASH_BASE, flash_size) ); } putc ('\n'); # else /* !CFG_FLASH_CHECKSUM */ print_size (flash_size, "\n"); # endif /* CFG_FLASH_CHECKSUM */ } else { puts (failed); hang (); } bd->bi_flashstart = CFG_FLASH_BASE; /* update start of FLASH memory */ bd->bi_flashsize = flash_size; /* size of FLASH memory (final value) */ bd->bi_flashoffset = 0; #else /* CFG_NO_FLASH */ bd->bi_flashsize = 0; bd->bi_flashstart = 0; bd->bi_flashoffset = 0; #endif /* !CFG_NO_FLASH */ WATCHDOG_RESET (); /* initialize higher level parts of CPU like time base and timers */ cpu_init_r (); WATCHDOG_RESET (); /* initialize malloc() area */ mem_malloc_init (); malloc_bin_reloc (); #ifdef CONFIG_SPI # if !defined(CFG_ENV_IS_IN_EEPROM) spi_init_f (); # endif spi_init_r (); #endif /* relocate environment function pointers etc. */ env_relocate (); /* * Fill in missing fields of bd_info. * We do this here, where we have "normal" access to the * environment; we used to do this still running from ROM, * where had to use getenv_r(), which can be pretty slow when * the environment is in EEPROM. */ s = getenv ("ethaddr"); for (i = 0; i < 6; ++i) { bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0; if (s) s = (*e) ? e + 1 : e; } /* IP Address */ bd->bi_ip_addr = getenv_IPaddr ("ipaddr"); WATCHDOG_RESET (); /** leave this here (after malloc(), environment and PCI are working) **/ /* Initialize devices */ devices_init (); /* Initialize the jump table for applications */ jumptable_init (); /* Initialize the console (after the relocation and devices init) */ console_init_r (); #if defined(CONFIG_MISC_INIT_R) /* miscellaneous platform dependent initialisations */ misc_init_r (); #endif #if (CONFIG_COMMANDS & CFG_CMD_KGDB) WATCHDOG_RESET (); puts ("KGDB: "); kgdb_init (); #endif debug ("U-Boot relocated to %08lx\n", dest_addr); /* * Enable Interrupts */ interrupt_init (); /* Must happen after interrupts are initialized since * an irq handler gets installed */ timer_init(); #ifdef CONFIG_SERIAL_SOFTWARE_FIFO serial_buffered_init(); #endif #ifdef CONFIG_STATUS_LED status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING); #endif udelay (20); set_timer (0); /* Insert function pointers now that we have relocated the code */ /* Initialize from environment */ if ((s = getenv ("loadaddr")) != NULL) { load_addr = simple_strtoul (s, NULL, 16); } #if (CONFIG_COMMANDS & CFG_CMD_NET) if ((s = getenv ("bootfile")) != NULL) { copy_filename (BootFile, s, sizeof (BootFile)); } #endif /* CFG_CMD_NET */ WATCHDOG_RESET (); #if (CONFIG_COMMANDS & CFG_CMD_DOC) WATCHDOG_RESET (); puts ("DOC: "); doc_init (); #endif #if (CONFIG_COMMANDS & CFG_CMD_NAND) WATCHDOG_RESET (); puts ("NAND: "); nand_init(); /* go init the NAND */ #endif #if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(FEC_ENET) WATCHDOG_RESET(); eth_init(bd); #endif #ifdef CONFIG_POST post_run (NULL, POST_RAM | post_bootmode_get(0)); #endif #ifdef CONFIG_LAST_STAGE_INIT WATCHDOG_RESET (); /* * Some parts can be only initialized if all others (like * Interrupts) are up and running (i.e. the PC-style ISA * keyboard). */ last_stage_init (); #endif #if (CONFIG_COMMANDS & CFG_CMD_BEDBUG) WATCHDOG_RESET (); bedbug_init (); #endif #if defined(CONFIG_PRAM) || defined(CONFIG_LOGBUFFER) /* * Export available size of memory for Linux, * taking into account the protected RAM at top of memory */ { ulong pram; uchar memsz[32]; #ifdef CONFIG_PRAM char *s; if ((s = getenv ("pram")) != NULL) { pram = simple_strtoul (s, NULL, 10); } else { pram = CONFIG_PRAM; } #else pram=0; #endif #ifdef CONFIG_LOGBUFFER /* Also take the logbuffer into account (pram is in kB) */ pram += (LOGBUFF_LEN+LOGBUFF_OVERHEAD)/1024; #endif sprintf (memsz, "%ldk", (bd->bi_memsize / 1024) - pram); setenv ("mem", memsz); } #endif #ifdef CONFIG_MODEM_SUPPORT { extern int do_mdm_init; do_mdm_init = gd->do_mdm_init; } #endif #ifdef CONFIG_WATCHDOG /* disable watchdog if environment is set */ if ((s = getenv ("watchdog")) != NULL) { if (strncmp (s, "off", 3) == 0) { WATCHDOG_DISABLE (); } } #endif /* CONFIG_WATCHDOG*/ /* Initialization complete - start the monitor */ /* main_loop() can return to retry autoboot, if so just run it again. */ for (;;) { WATCHDOG_RESET (); main_loop (); } /* NOTREACHED - no way out of command loop except booting */ } void hang(void) { puts ("### ERROR ### Please RESET the board ###\n"); for (;;); }