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Diffstat (limited to 'arch/nios/lib/board.c')
| -rw-r--r-- | arch/nios/lib/board.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/arch/nios/lib/board.c b/arch/nios/lib/board.c new file mode 100644 index 0000000..5d2fb2e --- /dev/null +++ b/arch/nios/lib/board.c @@ -0,0 +1,168 @@ +/* + * (C) Copyright 2003, Psyent Corporation <www.psyent.com> + * Scott McNutt <smcnutt@psyent.com> + * + * (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 <stdio_dev.h> +#include <watchdog.h> +#include <malloc.h> +#include <net.h> +#ifdef CONFIG_STATUS_LED +#include <status_led.h> +#endif + +DECLARE_GLOBAL_DATA_PTR; + +/* + * 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); + + +/************************************************************************ + * Initialization sequence * + ***********************************************************************/ + +init_fnc_t *init_sequence[] = { + +#if defined(CONFIG_BOARD_EARLY_INIT_F) + board_early_init_f, /* Call board-specific init code early.*/ +#endif + + env_init, + serial_init, + console_init_f, + display_options, + checkcpu, + checkboard, + NULL, /* Terminate this list */ +}; + + +/***********************************************************************/ +void board_init (void) +{ + bd_t *bd; + init_fnc_t **init_fnc_ptr; + char *s, *e; + int i; + + /* Pointer is writable since we allocated a register for it. + * Nios treats CONFIG_SYS_GBL_DATA_OFFSET as an address. + */ + gd = (gd_t *)CONFIG_SYS_GBL_DATA_OFFSET; + /* compiler optimization barrier needed for GCC >= 3.4 */ + __asm__ __volatile__("": : :"memory"); + + memset( gd, 0, CONFIG_SYS_GBL_DATA_SIZE ); + + gd->bd = (bd_t *)(gd+1); /* At end of global data */ + gd->baudrate = CONFIG_BAUDRATE; + gd->cpu_clk = CONFIG_SYS_CLK_FREQ; + + bd = gd->bd; + bd->bi_memstart = CONFIG_SYS_SDRAM_BASE; + bd->bi_memsize = CONFIG_SYS_SDRAM_SIZE; + bd->bi_flashstart = CONFIG_SYS_FLASH_BASE; +#if defined(CONFIG_SYS_SRAM_BASE) && defined(CONFIG_SYS_SRAM_SIZE) + bd->bi_sramstart= CONFIG_SYS_SRAM_BASE; + bd->bi_sramsize = CONFIG_SYS_SRAM_SIZE; +#endif + bd->bi_baudrate = CONFIG_BAUDRATE; + + for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) { + WATCHDOG_RESET (); + if ((*init_fnc_ptr) () != 0) { + hang (); + } + } + + WATCHDOG_RESET (); + + /* The Malloc area is immediately below the monitor copy in RAM */ + mem_malloc_init(CONFIG_SYS_MALLOC_BASE, CONFIG_SYS_MALLOC_LEN); + + WATCHDOG_RESET (); + bd->bi_flashsize = flash_init(); + + WATCHDOG_RESET (); + env_relocate(); + + bd->bi_ip_addr = getenv_IPaddr ("ipaddr"); + + WATCHDOG_RESET (); + stdio_init(); + jumptable_init(); + console_init_r(); + /* + */ + + WATCHDOG_RESET (); + interrupt_init (); + +#ifdef CONFIG_STATUS_LED + status_led_set(STATUS_LED_BOOT, STATUS_LED_BLINKING); +#endif + + /* main_loop */ + for (;;) { + WATCHDOG_RESET (); + main_loop (); + } +} + + +/***********************************************************************/ + +void hang (void) +{ +#ifdef CONFIG_STATUS_LED + status_led_set(STATUS_LED_BOOT, STATUS_LED_OFF); + status_led_set(STATUS_LED_RED, STATUS_LED_BLINKING); +#endif + puts("### ERROR ### Please reset board ###\n"); + for (;;); +} + +unsigned long do_go_exec (ulong (*entry)(int, char *[]), int argc, char *argv[]) +{ + /* + * x86 does not use a dedicated register to pass the pointer + * to the global_data + */ + argv[-1] = (char *)gd; + return entry (argc, argv); +} |