arch/nios2/lib/board.c

   1 /*
   2  * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
   3  * Scott McNutt <smcnutt@psyent.com>
   4  *
   5  * (C) Copyright 2000-2002
   6  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   7  *
   8  * See file CREDITS for list of people who contributed to this
   9  * project.
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License as
  13  * published by the Free Software Foundation; either version 2 of
  14  * the License, or (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  24  * MA 02111-1307 USA
  25  */
  26
  27 #include <common.h>
  28 #include <stdio_dev.h>
  29 #include <watchdog.h>
  30 #include <malloc.h>
  31 #include <net.h>
  32 #ifdef CONFIG_STATUS_LED
  33 #include <status_led.h>
  34 #endif
  35 #if defined(CONFIG_SYS_NIOS_EPCSBASE)
  36 #include <nios2-epcs.h>
  37 #endif
  38
  39 DECLARE_GLOBAL_DATA_PTR;
  40
  41 /*
  42  * All attempts to come up with a "common" initialization sequence
  43  * that works for all boards and architectures failed: some of the
  44  * requirements are just _too_ different. To get rid of the resulting
  45  * mess of board dependend #ifdef'ed code we now make the whole
  46  * initialization sequence configurable to the user.
  47  *
  48  * The requirements for any new initalization function is simple: it
  49  * receives a pointer to the "global data" structure as it's only
  50  * argument, and returns an integer return code, where 0 means
  51  * "continue" and != 0 means "fatal error, hang the system".
  52  */
  53
  54
  55 typedef int (init_fnc_t) (void);
  56
  57
  58 /************************************************************************
  59  * Initialization sequence                                              *
  60  ***********************************************************************/
  61
  62 init_fnc_t *init_sequence[] = {
  63
  64 #if defined(CONFIG_BOARD_EARLY_INIT_F)
  65         board_early_init_f,     /* Call board-specific init code early.*/
  66 #endif
  67 #if defined(CONFIG_SYS_NIOS_EPCSBASE)
  68         epcs_reset,
  69 #endif
  70
  71         env_init,
  72         serial_init,
  73         console_init_f,
  74         display_options,
  75         checkcpu,
  76         checkboard,
  77         NULL,                   /* Terminate this list */
  78 };
  79
  80
  81 /***********************************************************************/
  82 void board_init (void)
  83 {
  84         bd_t *bd;
  85         init_fnc_t **init_fnc_ptr;
  86
  87         /* Pointer is writable since we allocated a register for it.
  88          * Nios treats CONFIG_SYS_GBL_DATA_OFFSET as an address.
  89          */
  90         gd = (gd_t *)CONFIG_SYS_GBL_DATA_OFFSET;
  91         /* compiler optimization barrier needed for GCC >= 3.4 */
  92         __asm__ __volatile__("": : :"memory");
  93
  94         memset( gd, 0, CONFIG_SYS_GBL_DATA_SIZE );
  95
  96         gd->bd = (bd_t *)(gd+1);        /* At end of global data */
  97         gd->baudrate = CONFIG_BAUDRATE;
  98         gd->cpu_clk = CONFIG_SYS_CLK_FREQ;
  99
 100         bd = gd->bd;
 101         bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;
 102         bd->bi_memsize = CONFIG_SYS_SDRAM_SIZE;
 103         bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
 104 #if     defined(CONFIG_SYS_SRAM_BASE) && defined(CONFIG_SYS_SRAM_SIZE)
 105         bd->bi_sramstart= CONFIG_SYS_SRAM_BASE;
 106         bd->bi_sramsize = CONFIG_SYS_SRAM_SIZE;
 107 #endif
 108         bd->bi_baudrate = CONFIG_BAUDRATE;
 109
 110         for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
 111                 WATCHDOG_RESET ();
 112                 if ((*init_fnc_ptr) () != 0) {
 113                         hang ();
 114                 }
 115         }
 116
 117         WATCHDOG_RESET ();
 118
 119         /* The Malloc area is immediately below the monitor copy in RAM */
 120         mem_malloc_init(CONFIG_SYS_MALLOC_BASE, CONFIG_SYS_MALLOC_LEN);
 121
 122         WATCHDOG_RESET ();
 123         bd->bi_flashsize = flash_init();
 124
 125         WATCHDOG_RESET ();
 126         env_relocate();
 127
 128         bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
 129
 130         WATCHDOG_RESET ();
 131         stdio_init();
 132         jumptable_init();
 133         console_init_r();
 134
 135         WATCHDOG_RESET ();
 136         interrupt_init ();
 137
 138 #if defined(CONFIG_BOARD_LATE_INIT)
 139         board_late_init ();
 140 #endif
 141
 142 #if defined(CONFIG_CMD_NET)
 143 #if defined(CONFIG_NET_MULTI)
 144         puts ("Net:   ");
 145 #endif
 146         eth_initialize (bd);
 147 #endif
 148
 149         /* main_loop */
 150         for (;;) {
 151                 WATCHDOG_RESET ();
 152                 main_loop ();
 153         }
 154 }
 155
 156
 157 /***********************************************************************/
 158
 159 void hang (void)
 160 {
 161         disable_interrupts ();
 162         puts("### ERROR ### Please reset board ###\n");
 163         for (;;);
 164 }