/* * (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 #include #include #if defined(CONFIG_CMD_IDE) #include #endif #if defined(CONFIG_CMD_SCSI) #include #endif #if defined(CONFIG_CMD_KGDB) #include #endif #ifdef CONFIG_STATUS_LED #include #endif #include #include #if defined(CONFIG_CMD_BEDBUG) #include #endif #ifdef CONFIG_SYS_ALLOC_DPRAM #include #endif #include #if defined(CONFIG_HARD_I2C) || \ defined(CONFIG_SOFT_I2C) #include #endif #ifdef CONFIG_CMD_SPI #include #endif #ifdef CONFIG_BITBANGMII #include #endif #include DECLARE_GLOBAL_DATA_PTR; static char *failed = "*** failed ***\n"; #include extern ulong __init_end; extern ulong __bss_end; #if defined(CONFIG_WATCHDOG) # undef INIT_FUNC_WATCHDOG_INIT # 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; /************************************************************************ * Utilities * ************************************************************************ */ /* * 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) { gd->baudrate = getenv_ulong("baudrate", 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 (CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); puts ("ready\n"); return (0); } #endif #if defined(CONFIG_HARD_SPI) static int init_func_spi (void) { puts ("SPI: "); spi_init (); puts ("ready\n"); return (0); } #endif /***********************************************************************/ /************************************************************************ * Initialization sequence * ************************************************************************ */ init_fnc_t *init_sequence[] = { get_clocks, 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 #if defined(CONFIG_HARD_SPI) init_func_spi, #endif init_func_ram, #if defined(CONFIG_SYS_DRAM_TEST) testdram, #endif /* CONFIG_SYS_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 ulong reg; #endif /* Pointer is writable since we allocated a register for it */ gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_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)&__bss_end - CONFIG_SYS_MONITOR_BASE; addr = CONFIG_SYS_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 */ reg = getenv_ulong("pram", 10, CONFIG_PRAM); addr -= (reg << 10); /* size is in kB */ debug ("Reserving %ldk for protected RAM at %08lx\n", reg, addr); #endif /* CONFIG_PRAM */ /* round down to next 4 kB limit */ addr &= ~(4096 - 1); debug ("Top of RAM usable for U-Boot at: %08lx\n", addr); #ifdef CONFIG_LCD #ifdef CONFIG_FB_ADDR gd->fb_base = CONFIG_FB_ADDR; #else /* reserve memory for LCD display (always full pages) */ addr = lcd_setmem (addr); gd->fb_base = addr; #endif /* CONFIG_FB_ADDR */ #endif /* CONFIG_LCD */ /* * 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 %zu Bytes for Board Info at: %08lx\n", sizeof (bd_t), addr_sp); addr_sp -= sizeof (gd_t); id = (gd_t *) addr_sp; debug ("Reserving %zu Bytes for Global Data at: %08lx\n", sizeof (gd_t), addr_sp); /* Reserve memory for boot params. */ addr_sp -= CONFIG_SYS_BOOTPARAMS_LEN; bd->bi_boot_params = addr_sp; debug ("Reserving %dk for boot parameters at: %08lx\n", CONFIG_SYS_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 = CONFIG_SYS_SDRAM_BASE; /* start of DRAM memory */ bd->bi_memsize = gd->ram_size; /* size of DRAM memory in bytes */ #ifdef CONFIG_SYS_INIT_RAM_ADDR bd->bi_sramstart = CONFIG_SYS_INIT_RAM_ADDR; /* start of SRAM memory */ bd->bi_sramsize = CONFIG_SYS_INIT_RAM_SIZE; /* size of SRAM memory */ #endif bd->bi_mbar_base = CONFIG_SYS_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 */ #ifdef CONFIG_PCI bd->bi_pcifreq = gd->pci_clk; /* PCI Freq in Hz */ #endif #ifdef CONFIG_EXTRA_CLOCK bd->bi_inpfreq = gd->arch.inp_clk; /* input Freq in Hz */ bd->bi_vcofreq = gd->arch.vco_clk; /* vco Freq in Hz */ bd->bi_flbfreq = gd->arch.flb_clk; /* flexbus Freq in Hz */ #endif bd->bi_baudrate = gd->baudrate; /* Console Baudrate */ #ifdef CONFIG_SYS_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", CONFIG_SYS_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) { char *s __maybe_unused; bd_t *bd; #ifndef CONFIG_ENV_IS_NOWHERE extern char * env_name_spec; #endif #ifndef CONFIG_SYS_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 - CONFIG_SYS_MONITOR_BASE; serial_initialize(); monitor_flash_len = (ulong)&__init_end - dest_addr; #if defined(CONFIG_NEEDS_MANUAL_RELOC) /* * We have to relocate the command table manually */ fixup_cmdtable(ll_entry_start(cmd_tbl_t, cmd), ll_entry_count(cmd_tbl_t, cmd)); #endif /* defined(CONFIG_NEEDS_MANUAL_RELOC) */ /* there are some other pointer constants we must deal with */ #ifndef CONFIG_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 (CONFIG_SYS_SDRAM_BASE); /* The Malloc area is immediately below the monitor copy in DRAM */ mem_malloc_init (CONFIG_SYS_MONITOR_BASE + gd->reloc_off - TOTAL_MALLOC_LEN, TOTAL_MALLOC_LEN); #if !defined(CONFIG_SYS_NO_FLASH) puts ("Flash: "); if ((flash_size = flash_init ()) > 0) { # ifdef CONFIG_SYS_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 */ if (getenv_yesno("flashchecksum") == 1) { printf (" CRC: %08X", crc32 (0, (const unsigned char *) CONFIG_SYS_FLASH_BASE, flash_size) ); } putc ('\n'); # else /* !CONFIG_SYS_FLASH_CHECKSUM */ print_size (flash_size, "\n"); # endif /* CONFIG_SYS_FLASH_CHECKSUM */ } else { puts (failed); hang (); } bd->bi_flashstart = CONFIG_SYS_FLASH_BASE; /* update start of FLASH memory */ bd->bi_flashsize = flash_size; /* size of FLASH memory (final value) */ bd->bi_flashoffset = 0; #else /* CONFIG_SYS_NO_FLASH */ bd->bi_flashsize = 0; bd->bi_flashstart = 0; bd->bi_flashoffset = 0; #endif /* !CONFIG_SYS_NO_FLASH */ WATCHDOG_RESET (); /* initialize higher level parts of CPU like time base and timers */ cpu_init_r (); WATCHDOG_RESET (); #ifdef CONFIG_SPI # if !defined(CONFIG_ENV_IS_IN_EEPROM) spi_init_f (); # endif spi_init_r (); #endif /* relocate environment function pointers etc. */ env_relocate (); WATCHDOG_RESET (); #if defined(CONFIG_PCI) /* * Do pci configuration */ pci_init (); #endif /** leave this here (after malloc(), environment and PCI are working) **/ /* Initialize stdio devices */ stdio_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 defined(CONFIG_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_STATUS_LED status_led_set (STATUS_LED_BOOT, STATUS_LED_BLINKING); #endif udelay (20); /* Insert function pointers now that we have relocated the code */ /* Initialize from environment */ load_addr = getenv_ulong("loadaddr", 16, load_addr); WATCHDOG_RESET (); #if defined(CONFIG_CMD_DOC) WATCHDOG_RESET (); puts ("DOC: "); doc_init (); #endif #if defined(CONFIG_CMD_NAND) WATCHDOG_RESET (); puts ("NAND: "); nand_init(); /* go init the NAND */ #endif #ifdef CONFIG_BITBANGMII bb_miiphy_init(); #endif #if defined(CONFIG_CMD_NET) WATCHDOG_RESET(); #if defined(FEC_ENET) eth_init(bd); #endif puts ("Net: "); eth_initialize (bd); #endif #ifdef CONFIG_POST post_run (NULL, POST_RAM | post_bootmode_get(0)); #endif #if defined(CONFIG_CMD_PCMCIA) \ && !defined(CONFIG_CMD_IDE) WATCHDOG_RESET (); puts ("PCMCIA:"); pcmcia_init (); #endif #if defined(CONFIG_CMD_IDE) WATCHDOG_RESET (); puts ("IDE: "); ide_init (); #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 defined(CONFIG_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 = 0; char memsz[32]; #ifdef CONFIG_PRAM pram = getenv_ulong("pram", 10, CONFIG_PRAM); #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 */ }