diff options
Diffstat (limited to 'arch/m68k')
| -rw-r--r-- | arch/m68k/config.mk | 30 | ||||
| -rw-r--r-- | arch/m68k/lib/Makefile | 50 | ||||
| -rw-r--r-- | arch/m68k/lib/board.c | 744 | ||||
| -rw-r--r-- | arch/m68k/lib/bootm.c | 146 | ||||
| -rw-r--r-- | arch/m68k/lib/cache.c | 150 | ||||
| -rw-r--r-- | arch/m68k/lib/interrupts.c | 115 | ||||
| -rw-r--r-- | arch/m68k/lib/time.c | 227 | ||||
| -rw-r--r-- | arch/m68k/lib/traps.c | 76 |
8 files changed, 1538 insertions, 0 deletions
diff --git a/arch/m68k/config.mk b/arch/m68k/config.mk new file mode 100644 index 000000000..749c38968 --- /dev/null +++ b/arch/m68k/config.mk @@ -0,0 +1,30 @@ +# +# (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 +# + +CROSS_COMPILE ?= m68k-elf- + +clibdir = $(shell dirname `$(CC) $(CFLAGS) -print-file-name=libc.a`) +STANDALONE_LOAD_ADDR = 0x20000 -L $(clibdir) + +PLATFORM_CPPFLAGS += -DCONFIG_M68K -D__M68K__ +PLATFORM_LDFLAGS += -n diff --git a/arch/m68k/lib/Makefile b/arch/m68k/lib/Makefile new file mode 100644 index 000000000..6db35ed2c --- /dev/null +++ b/arch/m68k/lib/Makefile @@ -0,0 +1,50 @@ +# +# (C) Copyright 2000-2006 +# 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 $(TOPDIR)/config.mk + +LIB = $(obj)lib$(ARCH).a + +SOBJS-y += + +COBJS-y += board.o +COBJS-y += bootm.o +COBJS-y += cache.o +COBJS-y += interrupts.o +COBJS-y += time.o +COBJS-y += traps.o + +SRCS := $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c) +OBJS := $(addprefix $(obj),$(SOBJS-y) $(COBJS-y)) + +$(LIB): $(obj).depend $(OBJS) + $(AR) $(ARFLAGS) $@ $(OBJS) + +######################################################################### + +# defines $(obj).depend target +include $(SRCTREE)/rules.mk + +sinclude $(obj).depend + +######################################################################### diff --git a/arch/m68k/lib/board.c b/arch/m68k/lib/board.c new file mode 100644 index 000000000..732023d67 --- /dev/null +++ b/arch/m68k/lib/board.c @@ -0,0 +1,744 @@ +/* + * (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 <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"; + +#ifdef CONFIG_PCU_E +extern flash_info_t flash_info[]; +#endif + +#include <environment.h> + +#if ( ((CONFIG_ENV_ADDR+CONFIG_ENV_SIZE) < CONFIG_SYS_MONITOR_BASE) || \ + (CONFIG_ENV_ADDR >= (CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN)) ) || \ + defined(CONFIG_ENV_IS_IN_NVRAM) +#define TOTAL_MALLOC_LEN (CONFIG_SYS_MALLOC_LEN + CONFIG_ENV_SIZE) +#else +#define TOTAL_MALLOC_LEN CONFIG_SYS_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; + +/************************************************************************ + * 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) +{ + char 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 (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 + int i; + ulong reg; + char tmp[64]; /* long enough for environment variables */ +#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)&_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 + */ + 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 */ + + /* 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 + /* reserve memory for LCD display (always full pages) */ + addr = lcd_setmem (addr); + gd->fb_base = 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_END; /* 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->inp_clk; /* input Freq in Hz */ + bd->bi_vcofreq = gd->vco_clk; /* vco Freq in Hz */ + bd->bi_flbfreq = gd->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) +{ + cmd_tbl_t *cmdtp; + char *s; + bd_t *bd; + extern void malloc_bin_reloc (void); + +#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 */ + +#ifdef CONFIG_SERIAL_MULTI + serial_initialize(); +#endif + + debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr); + + WATCHDOG_RESET (); + + gd->reloc_off = dest_addr - CONFIG_SYS_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 CONFIG_SYS_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 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); + malloc_bin_reloc (); + +#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 + */ + s = getenv ("flashchecksum"); + if (s && (*s == 'y')) { + 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 (); + + /* + * 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. + */ + bd->bi_ip_addr = getenv_IPaddr ("ipaddr"); + + 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_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 defined(CONFIG_CMD_NET) + if ((s = getenv ("bootfile")) != NULL) { + copy_filename (BootFile, s, sizeof (BootFile)); + } +#endif + + 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 +#if defined(CONFIG_NET_MULTI) + puts ("Net: "); + eth_initialize (bd); +#endif +#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; + char 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 (;;); +} diff --git a/arch/m68k/lib/bootm.c b/arch/m68k/lib/bootm.c new file mode 100644 index 000000000..e5ed6eb7c --- /dev/null +++ b/arch/m68k/lib/bootm.c @@ -0,0 +1,146 @@ +/* + * (C) Copyright 2003 + * 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 <command.h> +#include <image.h> +#include <u-boot/zlib.h> +#include <bzlib.h> +#include <watchdog.h> +#include <environment.h> +#include <asm/byteorder.h> +#ifdef CONFIG_SHOW_BOOT_PROGRESS +# include <status_led.h> +#endif + +DECLARE_GLOBAL_DATA_PTR; + +#define PHYSADDR(x) x + +#define LINUX_MAX_ENVS 256 +#define LINUX_MAX_ARGS 256 + +static ulong get_sp (void); +static void set_clocks_in_mhz (bd_t *kbd); + +void arch_lmb_reserve(struct lmb *lmb) +{ + ulong sp; + + /* + * Booting a (Linux) kernel image + * + * Allocate space for command line and board info - the + * address should be as high as possible within the reach of + * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused + * memory, which means far enough below the current stack + * pointer. + */ + sp = get_sp(); + debug ("## Current stack ends at 0x%08lx ", sp); + + /* adjust sp by 1K to be safe */ + sp -= 1024; + lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + gd->ram_size - sp)); +} + +int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images) +{ + ulong rd_len; + ulong initrd_start, initrd_end; + int ret; + + ulong cmd_start, cmd_end; + ulong bootmap_base; + bd_t *kbd; + void (*kernel) (bd_t *, ulong, ulong, ulong, ulong); + struct lmb *lmb = &images->lmb; + + if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) + return 1; + + bootmap_base = getenv_bootm_low(); + + /* allocate space and init command line */ + ret = boot_get_cmdline (lmb, &cmd_start, &cmd_end, bootmap_base); + if (ret) { + puts("ERROR with allocation of cmdline\n"); + goto error; + } + + /* allocate space for kernel copy of board info */ + ret = boot_get_kbd (lmb, &kbd, bootmap_base); + if (ret) { + puts("ERROR with allocation of kernel bd\n"); + goto error; + } + set_clocks_in_mhz(kbd); + + kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))images->ep; + + rd_len = images->rd_end - images->rd_start; + ret = boot_ramdisk_high (lmb, images->rd_start, rd_len, + &initrd_start, &initrd_end); + if (ret) + goto error; + + debug("## Transferring control to Linux (at address %08lx) ...\n", + (ulong) kernel); + + show_boot_progress (15); + + /* + * Linux Kernel Parameters (passing board info data): + * sp+00: Ignore, side effect of using jsr to jump to kernel + * sp+04: ptr to board info data + * sp+08: initrd_start or 0 if no initrd + * sp+12: initrd_end - unused if initrd_start is 0 + * sp+16: Start of command line string + * sp+20: End of command line string + */ + (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end); + /* does not return */ +error: + return 1; +} + +static ulong get_sp (void) +{ + ulong sp; + + asm("movel %%a7, %%d0\n" + "movel %%d0, %0\n": "=d"(sp): :"%d0"); + + return sp; +} + +static void set_clocks_in_mhz (bd_t *kbd) +{ + char *s; + + if ((s = getenv("clocks_in_mhz")) != NULL) { + /* convert all clock information to MHz */ + kbd->bi_intfreq /= 1000000L; + kbd->bi_busfreq /= 1000000L; + } +} diff --git a/arch/m68k/lib/cache.c b/arch/m68k/lib/cache.c new file mode 100644 index 000000000..ed881783f --- /dev/null +++ b/arch/m68k/lib/cache.c @@ -0,0 +1,150 @@ +/* + * (C) Copyright 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 <asm/immap.h> +#include <asm/cache.h> + +volatile int *cf_icache_status = (int *)ICACHE_STATUS; +volatile int *cf_dcache_status = (int *)DCACHE_STATUS; + +void flush_cache(ulong start_addr, ulong size) +{ + /* Must be implemented for all M68k processors with copy-back data cache */ +} + +int icache_status(void) +{ + return *cf_icache_status; +} + +int dcache_status(void) +{ + return *cf_dcache_status; +} + +void icache_enable(void) +{ + icache_invalid(); + + *cf_icache_status = 1; + +#ifdef CONFIG_CF_V4 + __asm__ __volatile__("movec %0, %%acr2"::"r"(CONFIG_SYS_CACHE_ACR2)); + __asm__ __volatile__("movec %0, %%acr3"::"r"(CONFIG_SYS_CACHE_ACR3)); +#elif defined(CONFIG_CF_V4e) + __asm__ __volatile__("movec %0, %%acr6"::"r"(CONFIG_SYS_CACHE_ACR6)); + __asm__ __volatile__("movec %0, %%acr7"::"r"(CONFIG_SYS_CACHE_ACR7)); +#else + __asm__ __volatile__("movec %0, %%acr0"::"r"(CONFIG_SYS_CACHE_ACR0)); + __asm__ __volatile__("movec %0, %%acr1"::"r"(CONFIG_SYS_CACHE_ACR1)); +#endif + + __asm__ __volatile__("movec %0, %%cacr"::"r"(CONFIG_SYS_CACHE_ICACR)); +} + +void icache_disable(void) +{ + u32 temp = 0; + + *cf_icache_status = 0; + icache_invalid(); + +#ifdef CONFIG_CF_V4 + __asm__ __volatile__("movec %0, %%acr2"::"r"(temp)); + __asm__ __volatile__("movec %0, %%acr3"::"r"(temp)); +#elif defined(CONFIG_CF_V4e) + __asm__ __volatile__("movec %0, %%acr6"::"r"(temp)); + __asm__ __volatile__("movec %0, %%acr7"::"r"(temp)); +#else + __asm__ __volatile__("movec %0, %%acr0"::"r"(temp)); + __asm__ __volatile__("movec %0, %%acr1"::"r"(temp)); + +#endif +} + +void icache_invalid(void) +{ + u32 temp; + + temp = CONFIG_SYS_ICACHE_INV; + if (*cf_icache_status) + temp |= CONFIG_SYS_CACHE_ICACR; + + __asm__ __volatile__("movec %0, %%cacr"::"r"(temp)); +} + +/* + * data cache only for ColdFire V4 such as MCF547x_8x, MCF5445x + * the dcache will be dummy in ColdFire V2 and V3 + */ +void dcache_enable(void) +{ + dcache_invalid(); + *cf_dcache_status = 1; + +#ifdef CONFIG_CF_V4 + __asm__ __volatile__("movec %0, %%acr0"::"r"(CONFIG_SYS_CACHE_ACR0)); + __asm__ __volatile__("movec %0, %%acr1"::"r"(CONFIG_SYS_CACHE_ACR1)); +#elif defined(CONFIG_CF_V4e) + __asm__ __volatile__("movec %0, %%acr4"::"r"(CONFIG_SYS_CACHE_ACR4)); + __asm__ __volatile__("movec %0, %%acr5"::"r"(CONFIG_SYS_CACHE_ACR5)); + +#endif + + __asm__ __volatile__("movec %0, %%cacr"::"r"(CONFIG_SYS_CACHE_DCACR)); +} + +void dcache_disable(void) +{ + u32 temp = 0; + + *cf_dcache_status = 0; + dcache_invalid(); + + __asm__ __volatile__("movec %0, %%cacr"::"r"(temp)); + +#ifdef CONFIG_CF_V4 + __asm__ __volatile__("movec %0, %%acr0"::"r"(temp)); + __asm__ __volatile__("movec %0, %%acr1"::"r"(temp)); +#elif defined(CONFIG_CF_V4e) + __asm__ __volatile__("movec %0, %%acr4"::"r"(temp)); + __asm__ __volatile__("movec %0, %%acr5"::"r"(temp)); + +#endif +} + +void dcache_invalid(void) +{ +#ifdef CONFIG_CF_V4 + u32 temp; + + temp = CONFIG_SYS_DCACHE_INV; + if (*cf_dcache_status) + temp |= CONFIG_SYS_CACHE_DCACR; + if (*cf_icache_status) + temp |= CONFIG_SYS_CACHE_ICACR; + + __asm__ __volatile__("movec %0, %%cacr"::"r"(temp)); +#endif +} diff --git a/arch/m68k/lib/interrupts.c b/arch/m68k/lib/interrupts.c new file mode 100644 index 000000000..133494f6d --- /dev/null +++ b/arch/m68k/lib/interrupts.c @@ -0,0 +1,115 @@ +/* + * (C) Copyright 2000-2004 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * (C) Copyright 2007 Freescale Semiconductor Inc + * TsiChung Liew (Tsi-Chung.Liew@freescale.com) + * + * 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 <asm/processor.h> +#include <asm/immap.h> + +#define NR_IRQS (CONFIG_SYS_NUM_IRQS) + +/* + * Interrupt vector functions. + */ +struct interrupt_action { + interrupt_handler_t *handler; + void *arg; +}; + +static struct interrupt_action irq_vecs[NR_IRQS]; + +static __inline__ unsigned short get_sr (void) +{ + unsigned short sr; + + asm volatile ("move.w %%sr,%0":"=r" (sr):); + + return sr; +} + +static __inline__ void set_sr (unsigned short sr) +{ + asm volatile ("move.w %0,%%sr"::"r" (sr)); +} + +/************************************************************************/ +/* + * Install and free an interrupt handler + */ +void irq_install_handler (int vec, interrupt_handler_t * handler, void *arg) +{ + if ((vec < 0) || (vec >= NR_IRQS)) { + printf ("irq_install_handler: wrong interrupt vector %d\n", + vec); + return; + } + + irq_vecs[vec].handler = handler; + irq_vecs[vec].arg = arg; +} + +void irq_free_handler (int vec) +{ + if ((vec < 0) || (vec >= NR_IRQS)) { + return; + } + + irq_vecs[vec].handler = NULL; + irq_vecs[vec].arg = NULL; +} + +void enable_interrupts (void) +{ + unsigned short sr; + + sr = get_sr (); + set_sr (sr & ~0x0700); +} + +int disable_interrupts (void) +{ + unsigned short sr; + + sr = get_sr (); + set_sr (sr | 0x0700); + + return ((sr & 0x0700) == 0); /* return TRUE, if interrupts were enabled before */ +} + +void int_handler (struct pt_regs *fp) +{ + int vec; + + vec = (fp->vector >> 2) & 0xff; + if (vec > 0x40) + vec -= 0x40; + + if (irq_vecs[vec].handler != NULL) { + irq_vecs[vec].handler (irq_vecs[vec].arg); + } else { + printf ("\nBogus External Interrupt Vector %d\n", vec); + } +} diff --git a/arch/m68k/lib/time.c b/arch/m68k/lib/time.c new file mode 100644 index 000000000..7eaea5e7f --- /dev/null +++ b/arch/m68k/lib/time.c @@ -0,0 +1,227 @@ +/* + * (C) Copyright 2003 Josef Baumgartner <josef.baumgartner@telex.de> + * + * (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> + +#include <asm/timer.h> +#include <asm/immap.h> +#include <watchdog.h> + +DECLARE_GLOBAL_DATA_PTR; + +static volatile ulong timestamp = 0; + +#ifndef CONFIG_SYS_WATCHDOG_FREQ +#define CONFIG_SYS_WATCHDOG_FREQ (CONFIG_SYS_HZ / 2) +#endif + +#if defined(CONFIG_MCFTMR) +#ifndef CONFIG_SYS_UDELAY_BASE +# error "uDelay base not defined!" +#endif + +#if !defined(CONFIG_SYS_TMR_BASE) || !defined(CONFIG_SYS_INTR_BASE) || !defined(CONFIG_SYS_TMRINTR_NO) || !defined(CONFIG_SYS_TMRINTR_MASK) +# error "TMR_BASE, INTR_BASE, TMRINTR_NO or TMRINTR_MASk not defined!" +#endif +extern void dtimer_intr_setup(void); + +void __udelay(unsigned long usec) +{ + volatile dtmr_t *timerp = (dtmr_t *) (CONFIG_SYS_UDELAY_BASE); + uint start, now, tmp; + + while (usec > 0) { + if (usec > 65000) + tmp = 65000; + else + tmp = usec; + usec = usec - tmp; + + /* Set up TIMER 3 as timebase clock */ + timerp->tmr = DTIM_DTMR_RST_RST; + timerp->tcn = 0; + /* set period to 1 us */ + timerp->tmr = + CONFIG_SYS_TIMER_PRESCALER | DTIM_DTMR_CLK_DIV1 | DTIM_DTMR_FRR | + DTIM_DTMR_RST_EN; + + start = now = timerp->tcn; + while (now < start + tmp) + now = timerp->tcn; + } +} + +void dtimer_interrupt(void *not_used) +{ + volatile dtmr_t *timerp = (dtmr_t *) (CONFIG_SYS_TMR_BASE); + + /* check for timer interrupt asserted */ + if ((CONFIG_SYS_TMRPND_REG & CONFIG_SYS_TMRINTR_MASK) == CONFIG_SYS_TMRINTR_PEND) { + timerp->ter = (DTIM_DTER_CAP | DTIM_DTER_REF); + timestamp++; + + #if defined(CONFIG_WATCHDOG) || defined (CONFIG_HW_WATCHDOG) + if ((timestamp % (CONFIG_SYS_WATCHDOG_FREQ)) == 0) { + WATCHDOG_RESET (); + } + #endif /* CONFIG_WATCHDOG || CONFIG_HW_WATCHDOG */ + return; + } +} + +void timer_init(void) +{ + volatile dtmr_t *timerp = (dtmr_t *) (CONFIG_SYS_TMR_BASE); + + timestamp = 0; + + timerp->tcn = 0; + timerp->trr = 0; + + /* Set up TIMER 4 as clock */ + timerp->tmr = DTIM_DTMR_RST_RST; + + /* initialize and enable timer interrupt */ + irq_install_handler(CONFIG_SYS_TMRINTR_NO, dtimer_interrupt, 0); + + timerp->tcn = 0; + timerp->trr = 1000; /* Interrupt every ms */ + + dtimer_intr_setup(); + + /* set a period of 1us, set timer mode to restart and enable timer and interrupt */ + timerp->tmr = CONFIG_SYS_TIMER_PRESCALER | DTIM_DTMR_CLK_DIV1 | + DTIM_DTMR_FRR | DTIM_DTMR_ORRI | DTIM_DTMR_RST_EN; +} + +void reset_timer(void) +{ + timestamp = 0; +} + +ulong get_timer(ulong base) +{ + return (timestamp - base); +} + +void set_timer(ulong t) +{ + timestamp = t; +} +#endif /* CONFIG_MCFTMR */ + +#if defined(CONFIG_MCFPIT) +#if !defined(CONFIG_SYS_PIT_BASE) +# error "CONFIG_SYS_PIT_BASE not defined!" +#endif + +static unsigned short lastinc; + +void __udelay(unsigned long usec) +{ + volatile pit_t *timerp = (pit_t *) (CONFIG_SYS_UDELAY_BASE); + uint tmp; + + while (usec > 0) { + if (usec > 65000) + tmp = 65000; + else + tmp = usec; + usec = usec - tmp; + + /* Set up TIMER 3 as timebase clock */ + timerp->pcsr = PIT_PCSR_OVW; + timerp->pmr = 0; + /* set period to 1 us */ + timerp->pcsr |= PIT_PCSR_PRE(CONFIG_SYS_PIT_PRESCALE) | PIT_PCSR_EN; + + timerp->pmr = tmp; + while (timerp->pcntr > 0) ; + } +} + +void timer_init(void) +{ + volatile pit_t *timerp = (pit_t *) (CONFIG_SYS_PIT_BASE); + timestamp = 0; + + /* Set up TIMER 4 as poll clock */ + timerp->pcsr = PIT_PCSR_OVW; + timerp->pmr = lastinc = 0; + timerp->pcsr |= PIT_PCSR_PRE(CONFIG_SYS_PIT_PRESCALE) | PIT_PCSR_EN; +} + +void set_timer(ulong t) +{ + volatile pit_t *timerp = (pit_t *) (CONFIG_SYS_PIT_BASE); + + timestamp = 0; + timerp->pmr = lastinc = 0; +} + +ulong get_timer(ulong base) +{ + unsigned short now, diff; + volatile pit_t *timerp = (pit_t *) (CONFIG_SYS_PIT_BASE); + + now = timerp->pcntr; + diff = -(now - lastinc); + + timestamp += diff; + lastinc = now; + return timestamp - base; +} + +void wait_ticks(unsigned long ticks) +{ + set_timer(0); + while (get_timer(0) < ticks) ; +} +#endif /* CONFIG_MCFPIT */ + +/* + * This function is derived from PowerPC code (read timebase as long long). + * On M68K it just returns the timer value. + */ +unsigned long long get_ticks(void) +{ + return get_timer(0); +} + +unsigned long usec2ticks(unsigned long usec) +{ + return get_timer(usec); +} + +/* + * This function is derived from PowerPC code (timebase clock frequency). + * On M68K it returns the number of timer ticks per second. + */ +ulong get_tbclk(void) +{ + ulong tbclk; + tbclk = CONFIG_SYS_HZ; + return tbclk; +} diff --git a/arch/m68k/lib/traps.c b/arch/m68k/lib/traps.c new file mode 100644 index 000000000..1ca94dc55 --- /dev/null +++ b/arch/m68k/lib/traps.c @@ -0,0 +1,76 @@ +/* + * (C) Copyright 2003 + * Josef Baumgartner <josef.baumgartner@telex.de> + * + * (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> +#include <watchdog.h> +#include <command.h> +#include <asm/processor.h> + + +extern void _exc_handler(void); +extern void _int_handler(void); + +static void show_frame(struct pt_regs *fp) +{ + printf ("Vector Number: %d Format: %02x Fault Status: %01x\n\n", (fp->vector & 0x3fc) >> 2, + fp->format, (fp->vector & 0x3) | ((fp->vector & 0xc00) >> 8)); + printf ("PC: %08lx SR: %08lx SP: %08lx\n", fp->pc, (long) fp->sr, (long) fp); + printf ("D0: %08lx D1: %08lx D2: %08lx D3: %08lx\n", + fp->d0, fp->d1, fp->d2, fp->d3); + printf ("D4: %08lx D5: %08lx D6: %08lx D7: %08lx\n", + fp->d4, fp->d5, fp->d6, fp->d7); + printf ("A0: %08lx A1: %08lx A2: %08lx A3: %08lx\n", + fp->a0, fp->a1, fp->a2, fp->a3); + printf ("A4: %08lx A5: %08lx A6: %08lx\n", + fp->a4, fp->a5, fp->a6); +} + +void exc_handler(struct pt_regs *fp) { + printf("\n\n*** Unexpected exception ***\n"); + show_frame (fp); + printf("\n*** Please Reset Board! ***\n"); + for(;;); +} + +void trap_init(ulong value) { + unsigned long *vec = (ulong *)value; + int i; + + for(i = 2; i < 25; i++) { + vec[i] = (unsigned long)_exc_handler; + } + for(i = 25; i < 32; i++) { + vec[i] = (unsigned long)_int_handler; + } + for(i = 32; i < 64; i++) { + vec[i] = (unsigned long)_exc_handler; + } + for(i = 64; i < 256; i++) { + vec[i] = (unsigned long)_int_handler; + } + + setvbr(value); /* set vector base register to new table */ +} |