board.c 4.1 KB

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  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. #include <common.h>
  27. #include <stdio_dev.h>
  28. #include <watchdog.h>
  29. #include <malloc.h>
  30. #include <net.h>
  31. #ifdef CONFIG_STATUS_LED
  32. #include <status_led.h>
  33. #endif
  34. #if defined(CONFIG_SYS_NIOS_EPCSBASE)
  35. #include <nios2-epcs.h>
  36. #endif
  37. DECLARE_GLOBAL_DATA_PTR;
  38. /*
  39. * All attempts to come up with a "common" initialization sequence
  40. * that works for all boards and architectures failed: some of the
  41. * requirements are just _too_ different. To get rid of the resulting
  42. * mess of board dependend #ifdef'ed code we now make the whole
  43. * initialization sequence configurable to the user.
  44. *
  45. * The requirements for any new initalization function is simple: it
  46. * receives a pointer to the "global data" structure as it's only
  47. * argument, and returns an integer return code, where 0 means
  48. * "continue" and != 0 means "fatal error, hang the system".
  49. */
  50. typedef int (init_fnc_t) (void);
  51. /************************************************************************
  52. * Initialization sequence *
  53. ***********************************************************************/
  54. init_fnc_t *init_sequence[] = {
  55. #if defined(CONFIG_BOARD_EARLY_INIT_F)
  56. board_early_init_f, /* Call board-specific init code early.*/
  57. #endif
  58. #if defined(CONFIG_SYS_NIOS_EPCSBASE)
  59. epcs_reset,
  60. #endif
  61. env_init,
  62. serial_init,
  63. console_init_f,
  64. display_options,
  65. checkcpu,
  66. checkboard,
  67. NULL, /* Terminate this list */
  68. };
  69. /***********************************************************************/
  70. void board_init (void)
  71. {
  72. bd_t *bd;
  73. init_fnc_t **init_fnc_ptr;
  74. /* Pointer is writable since we allocated a register for it.
  75. * Nios treats CONFIG_SYS_GBL_DATA_OFFSET as an address.
  76. */
  77. gd = (gd_t *)CONFIG_SYS_GBL_DATA_OFFSET;
  78. /* compiler optimization barrier needed for GCC >= 3.4 */
  79. __asm__ __volatile__("": : :"memory");
  80. memset( gd, 0, CONFIG_SYS_GBL_DATA_SIZE );
  81. gd->bd = (bd_t *)(gd+1); /* At end of global data */
  82. gd->baudrate = CONFIG_BAUDRATE;
  83. gd->cpu_clk = CONFIG_SYS_CLK_FREQ;
  84. bd = gd->bd;
  85. bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;
  86. bd->bi_memsize = CONFIG_SYS_SDRAM_SIZE;
  87. bd->bi_flashstart = CONFIG_SYS_FLASH_BASE;
  88. #if defined(CONFIG_SYS_SRAM_BASE) && defined(CONFIG_SYS_SRAM_SIZE)
  89. bd->bi_sramstart= CONFIG_SYS_SRAM_BASE;
  90. bd->bi_sramsize = CONFIG_SYS_SRAM_SIZE;
  91. #endif
  92. bd->bi_baudrate = CONFIG_BAUDRATE;
  93. for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
  94. WATCHDOG_RESET ();
  95. if ((*init_fnc_ptr) () != 0) {
  96. hang ();
  97. }
  98. }
  99. WATCHDOG_RESET ();
  100. /* The Malloc area is immediately below the monitor copy in RAM */
  101. mem_malloc_init(CONFIG_SYS_MALLOC_BASE, CONFIG_SYS_MALLOC_LEN);
  102. WATCHDOG_RESET ();
  103. bd->bi_flashsize = flash_init();
  104. WATCHDOG_RESET ();
  105. env_relocate();
  106. bd->bi_ip_addr = getenv_IPaddr ("ipaddr");
  107. WATCHDOG_RESET ();
  108. stdio_init();
  109. jumptable_init();
  110. console_init_r();
  111. WATCHDOG_RESET ();
  112. interrupt_init ();
  113. #if defined(CONFIG_BOARD_LATE_INIT)
  114. board_late_init ();
  115. #endif
  116. /* main_loop */
  117. for (;;) {
  118. WATCHDOG_RESET ();
  119. main_loop ();
  120. }
  121. }
  122. /***********************************************************************/
  123. void hang (void)
  124. {
  125. disable_interrupts ();
  126. puts("### ERROR ### Please reset board ###\n");
  127. for (;;);
  128. }