diff options
Diffstat (limited to 'lib_ppc')
| -rw-r--r-- | lib_ppc/board.c | 962 | ||||
| -rw-r--r-- | lib_ppc/extable.c | 83 |
2 files changed, 1045 insertions, 0 deletions
diff --git a/lib_ppc/board.c b/lib_ppc/board.c new file mode 100644 index 0000000..347b663 --- /dev/null +++ b/lib_ppc/board.c @@ -0,0 +1,962 @@ +/* + * (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 <devices.h> +#include <syscall.h> +#ifdef CONFIG_8xx +#include <mpc8xx.h> +#endif +#if (CONFIG_COMMANDS & CFG_CMD_IDE) +#include <ide.h> +#endif +#if (CONFIG_COMMANDS & CFG_CMD_SCSI) +#include <scsi.h> +#endif +#if (CONFIG_COMMANDS & CFG_CMD_KGDB) +#include <kgdb.h> +#endif +#ifdef CONFIG_STATUS_LED +#include <status_led.h> +#endif +#include <net.h> +#if (CONFIG_COMMANDS & CFG_CMD_BEDBUG) +#include <cmd_bedbug.h> +#endif +#ifdef CFG_ALLOC_DPRAM +#include <commproc.h> +#endif +#include <version.h> +#if defined(CONFIG_BAB7xx) +#include <w83c553f.h> +#endif +#include <dtt.h> +#if defined(CONFIG_POST) +#include <post.h> +#endif + +#if (CONFIG_COMMANDS & CFG_CMD_DOC) +void doc_init (void); +#endif +#if defined(CONFIG_HARD_I2C) || \ + defined(CONFIG_SOFT_I2C) +#include <i2c.h> +#endif + +static char *failed = "*** failed ***\n"; + +#if defined(CONFIG_PCU_E) || defined(CONFIG_OXC) +extern flash_info_t flash_info[]; +#endif + +#include <environment.h> + +#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 + +/* + * 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) +{ + DECLARE_GLOBAL_DATA_PTR; + + 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); +} + +static void syscalls_init (void) +{ + ulong *addr; + + syscall_tbl[SYSCALL_MALLOC] = (void *) malloc; + syscall_tbl[SYSCALL_FREE] = (void *) free; + + syscall_tbl[SYSCALL_INSTALL_HDLR] = (void *) irq_install_handler; + syscall_tbl[SYSCALL_FREE_HDLR] = (void *) irq_free_handler; + + addr = (ulong *) 0xc00; /* syscall ISR addr */ + + /* patch ISR code */ + *addr++ |= (ulong) syscall_tbl >> 16; + *addr++ |= (ulong) syscall_tbl & 0xFFFF; + *addr++ |= NR_SYSCALLS >> 16; + *addr++ |= NR_SYSCALLS & 0xFFFF; + + flush_cache (0x0C00, 0x10); +} + +/* + * 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) +{ + DECLARE_GLOBAL_DATA_PTR; + + 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) +{ + DECLARE_GLOBAL_DATA_PTR; + +#ifdef CONFIG_BOARD_TYPES + int board_type = gd->board_type; +#else + int board_type = 0; /* use dummy arg */ +#endif + 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 + +/***********************************************************************/ + +#if defined(CONFIG_WATCHDOG) +static int init_func_watchdog_init (void) +{ + puts (" Watchdog enabled\n"); + WATCHDOG_RESET (); + return (0); +} +# define INIT_FUNC_WATCHDOG_INIT init_func_watchdog_init, + +static int init_func_watchdog_reset (void) +{ + WATCHDOG_RESET (); + return (0); +} +# define INIT_FUNC_WATCHDOG_RESET init_func_watchdog_reset, +#else +# define INIT_FUNC_WATCHDOG_INIT /* undef */ +# define INIT_FUNC_WATCHDOG_RESET /* undef */ +#endif /* CONFIG_WATCHDOG */ + +/************************************************************************ + * Initialization sequence * + ************************************************************************ + */ + +init_fnc_t *init_sequence[] = { + +#if defined(CONFIG_BOARD_PRE_INIT) + board_pre_init, /* very early board init code (fpga boot, etc.) */ +#endif + + get_clocks, /* get CPU and bus clocks (etc.) */ + init_timebase, +#ifdef CFG_ALLOC_DPRAM + dpram_init, +#endif +#if defined(CONFIG_BOARD_POSTCLK_INIT) + board_postclk_init, +#endif + env_init, + init_baudrate, + serial_init, + console_init_f, + display_options, +#if defined(CONFIG_8260) + prt_8260_rsr, + prt_8260_clks, +#endif /* CONFIG_8260 */ + checkcpu, + checkboard, + INIT_FUNC_WATCHDOG_INIT +#if defined(CONFIG_BMW) || \ + defined(CONFIG_COGENT) || \ + defined(CONFIG_HYMOD) || \ + defined(CONFIG_RSD_PROTO) || \ + defined(CONFIG_W7O) + misc_init_f, +#endif + INIT_FUNC_WATCHDOG_RESET +#if defined(CONFIG_HARD_I2C) || defined(CONFIG_SOFT_I2C) + init_func_i2c, +#endif +#if defined(CONFIG_DTT) /* Digital Thermometers and Thermostats */ + dtt_init, +#endif + INIT_FUNC_WATCHDOG_RESET + init_func_ram, +#if defined(CFG_DRAM_TEST) + testdram, +#endif /* CFG_DRAM_TEST */ + INIT_FUNC_WATCHDOG_RESET + + 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) +{ + DECLARE_GLOBAL_DATA_PTR; + + bd_t *bd; + ulong len, addr, addr_sp; + 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); + +#ifndef CONFIG_8260 + /* Clear initial global data */ + memset ((void *) gd, 0, sizeof (gd_t)); +#endif + + 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 = get_endaddr () - CFG_MONITOR_BASE; + + if (len > CFG_MONITOR_LEN) { + printf ("*** U-Boot size %ld > reserved memory (%d)\n", + len, CFG_MONITOR_LEN); + hang (); + } + + if (CFG_MONITOR_LEN > len) + len = CFG_MONITOR_LEN; + +#ifndef CONFIG_VERY_BIG_RAM + addr = CFG_SDRAM_BASE + gd->ram_size; +#else + /* only allow stack below 256M */ + addr = CFG_SDRAM_BASE + + (gd->ram_size > 256 << 20) ? 256 << 20 : gd->ram_size; +#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 */ +# ifdef DEBUG + printf ("Reserving %ldk for protected RAM at %08lx\n", reg, addr); +# endif +#endif /* CONFIG_PRAM */ + + /* round down to next 4 kB limit */ + addr &= ~(4096 - 1); +#ifdef DEBUG + printf ("Top of RAM usable for U-Boot at: %08lx\n", addr); +#endif + +#ifdef CONFIG_LCD + /* reserve memory for LCD display (always full pages) */ + addr = lcd_setmem (addr); + gd->fb_base = addr; +#endif /* CONFIG_LCD */ + +#if defined(CONFIG_VIDEO) && defined(CONFIG_8xx) + /* reserve memory for video display (always full pages) */ + addr = video_setmem (addr); + gd->fb_base = addr; +#endif /* CONFIG_VIDEO */ + + /* + * reserve memory for U-Boot code, data & bss + * round down to next 4 kB limit + */ + addr -= len; + addr &= ~(4096 - 1); + +#ifdef DEBUG + printf ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr); +#endif + + /* + * reserve memory for malloc() arena + */ + addr_sp = addr - TOTAL_MALLOC_LEN; +#ifdef DEBUG + printf ("Reserving %dk for malloc() at: %08lx\n", + TOTAL_MALLOC_LEN >> 10, addr_sp); +#endif + + /* + * (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; +#ifdef DEBUG + printf ("Reserving %d Bytes for Board Info at: %08lx\n", + sizeof (bd_t), addr_sp); +#endif + addr_sp -= sizeof (gd_t); + id = (gd_t *) addr_sp; +#ifdef DEBUG + printf ("Reserving %d Bytes for Global Data at: %08lx\n", + sizeof (gd_t), addr_sp); +#endif + + /* + * 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; + *((ulong *) addr_sp)-- = 0; + *((ulong *) addr_sp)-- = 0; +#ifdef DEBUG + printf ("Stack Pointer at: %08lx\n", addr_sp); +#endif + + /* + * 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 */ + +#ifdef CONFIG_IP860 + bd->bi_sramstart = SRAM_BASE; /* start of SRAM memory */ + bd->bi_sramsize = SRAM_SIZE; /* size of SRAM memory */ +#else + bd->bi_sramstart = 0; /* FIXME */ /* start of SRAM memory */ + bd->bi_sramsize = 0; /* FIXME */ /* size of SRAM memory */ +#endif + +#if defined(CONFIG_8xx) || defined(CONFIG_8260) + bd->bi_immr_base = CFG_IMMR; /* base of IMMR register */ +#endif + + 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 */ +#if defined(CONFIG_8260) + bd->bi_cpmfreq = gd->cpm_clk; + bd->bi_brgfreq = gd->brg_clk; + bd->bi_sccfreq = gd->scc_clk; + bd->bi_vco = gd->vco_out; +#endif /* CONFIG_8260 */ + + 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)); + + bd->bi_procfreq = gd->cpu_clk; /* Processor Speed, In Hz */ + bd->bi_plb_busfreq = gd->bus_clk; +#ifdef CONFIG_405GP + bd->bi_pci_busfreq = get_PCI_freq (); +#endif +#endif + +#ifdef DEBUG + printf ("New Stack Pointer is: %08lx\n", addr_sp); +#endif + + WATCHDOG_RESET (); + +#ifdef CONFIG_POST + post_bootmode_init(); + post_run (NULL, POST_ROM | post_bootmode_get(0)); +#endif + + WATCHDOG_RESET(); + + memcpy (id, gd, sizeof (gd_t)); + + relocate_code (addr_sp, id, addr); + + /* NOTREACHED - relocate_code() 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) +{ + DECLARE_GLOBAL_DATA_PTR; + + 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 */ + +#ifdef DEBUG + printf ("Now running in RAM - U-Boot at: %08lx\n", dest_addr); +#endif + + WATCHDOG_RESET (); + + gd->reloc_off = dest_addr - CFG_MONITOR_BASE; + + /* + * We have to relocate the command table manually + */ + for (cmdtp = &cmd_tbl[0]; cmdtp->name; 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_POST + post_reloc (); +#endif + + WATCHDOG_RESET(); + +#if defined(CONFIG_IP860) || defined(CONFIG_PCU_E) || defined (CONFIG_FLAGADM) + icache_enable (); /* it's time to enable the instruction cache */ +#endif + +#if defined(CONFIG_BAB7xx) + /* + * Do pci configuration on BAB 7xx _before_ the flash + * is initialised, because we need the ISA bridge there. + */ + pci_init (); + /* + * Initialise the ISA bridge + */ + initialise_w83c553f (); +#endif + + asm ("sync ; isync"); + + /* + * Setup trap handlers + */ + trap_init (dest_addr); + +#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 + 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) */ +#if defined(CONFIG_PCU_E) || defined(CONFIG_OXC) + bd->bi_flashoffset = 0; +#elif CFG_MONITOR_BASE == CFG_FLASH_BASE + bd->bi_flashoffset = CFG_MONITOR_LEN; /* reserved area for startup monitor */ +#else + bd->bi_flashoffset = 0; +#endif +#else + + 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"); +#if defined (CONFIG_MBX) || defined (CONFIG_RPXCLASSIC) || defined(CONFIG_IAD210) + if (s == NULL) + board_get_enetaddr (bd->bi_enetaddr); + else +#endif + for (i = 0; i < 6; ++i) { + bd->bi_enetaddr[i] = s ? simple_strtoul (s, &e, 16) : 0; + if (s) + s = (*e) ? e + 1 : e; + } +#ifdef CONFIG_HERMES + if ((gd->board_type >> 16) == 2) + bd->bi_ethspeed = gd->board_type & 0xFFFF; + else + bd->bi_ethspeed = 0xFFFF; +#endif + +#ifdef CONFIG_NX823 + load_sernum_ethaddr (); +#endif + +#if defined(CFG_GT_6426x) || defined(CONFIG_PN62) + /* handle the 2nd ethernet address */ + + s = getenv ("eth1addr"); + + for (i = 0; i < 6; ++i) { + bd->bi_enet1addr[i] = s ? simple_strtoul (s, &e, 16) : 0; + if (s) + s = (*e) ? e + 1 : e; + } +#endif +#if defined(CFG_GT_6426x) + /* handle the 3rd ethernet address */ + + s = getenv ("eth2addr"); + + for (i = 0; i < 6; ++i) { + bd->bi_enet2addr[i] = s ? simple_strtoul (s, &e, 16) : 0; + if (s) + s = (*e) ? e + 1 : e; + } +#endif + + +#if defined(CONFIG_TQM8xxL) || defined(CONFIG_TQM8260) || \ + defined(CONFIG_CCM) + load_sernum_ethaddr (); +#endif + /* IP Address */ + bd->bi_ip_addr = getenv_IPaddr ("ipaddr"); + + WATCHDOG_RESET (); + +#if defined(CONFIG_PCI) && !defined(CONFIG_BAB7xx) + /* + * Do pci configuration + */ + pci_init (); +#endif + +/** leave this here (after malloc(), environment and PCI are working) **/ + /* Initialize devices */ + devices_init (); + + /* allocate syscalls table (console_init_r will fill it in */ + syscall_tbl = (void **) malloc (NR_SYSCALLS * sizeof (void *)); + + /* Initialize the console (after the relocation and devices init) */ + console_init_r (); +/** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** ** **/ + syscalls_init (); + +#if defined(CONFIG_CCM) || \ + defined(CONFIG_COGENT) || \ + defined(CONFIG_CPCI405) || \ + defined(CONFIG_EVB64260) || \ + defined(CONFIG_HYMOD) || \ + defined(CONFIG_LWMON) || \ + defined(CONFIG_PCU_E) || \ + defined(CONFIG_W7O) || \ + defined(CONFIG_MISC_INIT_R) + /* miscellaneous platform dependent initialisations */ + misc_init_r (); +#endif + +#ifdef CONFIG_HERMES + if (bd->bi_ethspeed != 0xFFFF) + hermes_start_lxt980 ((int) bd->bi_ethspeed); +#endif + +#if (CONFIG_COMMANDS & CFG_CMD_NET) && ( \ + defined(CONFIG_CCM) || \ + defined(CONFIG_EP8260) || \ + defined(CONFIG_IP860) || \ + defined(CONFIG_IVML24) || \ + defined(CONFIG_IVMS8) || \ + defined(CONFIG_LWMON) || \ + defined(CONFIG_MPC8260ADS) || \ + defined(CONFIG_PCU_E) || \ + defined(CONFIG_RPXSUPER) || \ + defined(CONFIG_SPD823TS) ) + + WATCHDOG_RESET (); +# ifdef DEBUG + puts ("Reset Ethernet PHY\n"); +# endif + reset_phy (); +#endif + +#if (CONFIG_COMMANDS & CFG_CMD_KGDB) + WATCHDOG_RESET (); + puts ("KGDB: "); + kgdb_init (); +#endif + +#ifdef DEBUG + printf ("U-Boot relocated to %08lx\n", dest_addr); +#endif + + /* + * Enable Interrupts + */ + interrupt_init (); + + /* Must happen after interrupts are initialized since + * an irq handler gets installed + */ +#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_SCSI) + WATCHDOG_RESET (); + puts ("SCSI: "); + scsi_init (); +#endif + +#if (CONFIG_COMMANDS & CFG_CMD_DOC) + WATCHDOG_RESET (); + puts ("DOC: "); + doc_init (); +#endif + +#if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(CONFIG_NET_MULTI) + WATCHDOG_RESET (); + puts ("Net: "); + eth_initialize (bd); +#endif + +#ifdef CONFIG_POST + post_run (NULL, POST_RAM | post_bootmode_get(0)); + if (post_bootmode_get(0) & POST_POWERFAIL) { + post_bootmode_clear(); + board_poweroff(); + } +#endif + +#if (CONFIG_COMMANDS & CFG_CMD_PCMCIA) && !(CONFIG_COMMANDS & CFG_CMD_IDE) + WATCHDOG_RESET (); + puts ("PCMCIA:"); + pcmcia_init (); +#endif + +#if (CONFIG_COMMANDS & CFG_CMD_IDE) + WATCHDOG_RESET (); +# ifdef CONFIG_IDE_8xx_PCCARD + puts ("PCMCIA:"); +# else + puts ("IDE: "); +#endif + ide_init (); +#endif /* CFG_CMD_IDE */ + +#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 + +#ifdef CONFIG_PRAM + /* + * Export available size of memory for Linux, + * taking into account the protected RAM at top of memory + */ + { + ulong pram; + char *s; + uchar memsz[32]; + + if ((s = getenv ("pram")) != NULL) { + pram = simple_strtoul (s, NULL, 10); + } else { + pram = CONFIG_PRAM; + } + sprintf (memsz, "%ldk", (bd->bi_memsize / 1024) - pram); + setenv ("mem", memsz); + } +#endif + + /* 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 (;;); +} + +#if 0 /* We could use plain global data, but the resulting code is bigger */ +/* + * Pointer to initial global data area + * + * Here we initialize it. + */ +#undef XTRN_DECLARE_GLOBAL_DATA_PTR +#define XTRN_DECLARE_GLOBAL_DATA_PTR /* empty = allocate here */ +DECLARE_GLOBAL_DATA_PTR = (gd_t *) (CFG_INIT_RAM_ADDR + CFG_GBL_DATA_OFFSET); +#endif /* 0 */ + +/************************************************************************/ diff --git a/lib_ppc/extable.c b/lib_ppc/extable.c new file mode 100644 index 0000000..2f90df0 --- /dev/null +++ b/lib_ppc/extable.c @@ -0,0 +1,83 @@ +/* + * Copyright (C) 1999 Magnus Damm <kieraypc01.p.y.kie.era.ericsson.se> + * + * (C) Copyright 2000 + * 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> + +/* + * The exception table consists of pairs of addresses: the first is the + * address of an instruction that is allowed to fault, and the second is + * the address at which the program should continue. No registers are + * modified, so it is entirely up to the continuation code to figure out + * what to do. + * + * All the routines below use bits of fixup code that are out of line + * with the main instruction path. This means when everything is well, + * we don't even have to jump over them. Further, they do not intrude + * on our cache or tlb entries. + */ + +struct exception_table_entry +{ + unsigned long insn, fixup; +}; + +extern const struct exception_table_entry __start___ex_table[]; +extern const struct exception_table_entry __stop___ex_table[]; + +static inline unsigned long +search_one_table(const struct exception_table_entry *first, + const struct exception_table_entry *last, + unsigned long value) +{ + while (first <= last) { + const struct exception_table_entry *mid; + long diff; + + mid = (last - first) / 2 + first; + diff = mid->insn - value; + if (diff == 0) + return mid->fixup; + else if (diff < 0) + first = mid+1; + else + last = mid-1; + } + return 0; +} + +int ex_tab_message = 1; + +unsigned long +search_exception_table(unsigned long addr) +{ + unsigned long ret; + + /* There is only the kernel to search. */ + ret = search_one_table(__start___ex_table, __stop___ex_table-1, addr); + if (ex_tab_message) + printf("Bus Fault @ 0x%08lx, fixup 0x%08lx\n", addr, ret); + if (ret) return ret; + + return 0; +} |