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Diffstat (limited to 'arch/m68k/lib/board.c')
| -rw-r--r-- | arch/m68k/lib/board.c | 665 |
1 files changed, 665 insertions, 0 deletions
diff --git a/arch/m68k/lib/board.c b/arch/m68k/lib/board.c new file mode 100644 index 0000000..efc9fcc --- /dev/null +++ b/arch/m68k/lib/board.c @@ -0,0 +1,665 @@ +/* + * (C) Copyright 2003 + * Josef Baumgartner <josef.baumgartner@telex.de> + * + * (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 <common.h> +#include <watchdog.h> +#include <command.h> +#include <malloc.h> +#include <stdio_dev.h> +#include <linux/compiler.h> + +#include <asm/immap.h> + +#if defined(CONFIG_CMD_IDE) +#include <ide.h> +#endif +#if defined(CONFIG_CMD_SCSI) +#include <scsi.h> +#endif +#if defined(CONFIG_CMD_KGDB) +#include <kgdb.h> +#endif +#ifdef CONFIG_STATUS_LED +#include <status_led.h> +#endif +#include <net.h> +#include <serial.h> +#if defined(CONFIG_CMD_BEDBUG) +#include <cmd_bedbug.h> +#endif +#ifdef CONFIG_SYS_ALLOC_DPRAM +#include <commproc.h> +#endif +#include <version.h> + +#if defined(CONFIG_HARD_I2C) || \ + defined(CONFIG_SOFT_I2C) +#include <i2c.h> +#endif + +#ifdef CONFIG_CMD_SPI +#include <spi.h> +#endif + +#ifdef CONFIG_BITBANGMII +#include <miiphy.h> +#endif + +#include <nand.h> + +DECLARE_GLOBAL_DATA_PTR; + +static char *failed = "*** failed ***\n"; + +#include <environment.h> + +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 */ + + WATCHDOG_RESET (); + + gd->reloc_off = dest_addr - CONFIG_SYS_MONITOR_BASE; + + serial_initialize(); + + debug("Now running in RAM - U-Boot at: %08lx\n", dest_addr); + + 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 */ +} |
