src/console/post.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2003 Eric Biederman
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License as
   8  * published by the Free Software Foundation; version 2 of
   9  * the License.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
  19  * MA 02110-1301 USA
  20  */
  21
  22 #include <arch/io.h>
  23 #include <console/console.h>
  24 #if CONFIG_CMOS_POST
  25 #include <pc80/mc146818rtc.h>
  26 #endif
  27 #include <elog.h>
  28
  29 /* Write POST information */
  30
  31 /* someday romcc will be gone. */
  32 #ifndef __ROMCC__
  33 /* Some mainboards have very nice features beyond just a simple display.
  34  * They can override this function.
  35  */
  36 void __attribute__((weak)) mainboard_post(uint8_t value)
  37 {
  38 }
  39
  40 #else
  41 /* This just keeps the number of #ifs to a minimum */
  42 #define mainboard_post(x)
  43 #endif
  44
  45 #if CONFIG_CMOS_POST
  46
  47 #if !defined(__PRE_RAM__)
  48 void cmos_post_log(void)
  49 {
  50         u8 code;
  51
  52         /* Get post code from other bank */
  53         switch (cmos_read(CMOS_POST_BANK_OFFSET)) {
  54         case CMOS_POST_BANK_0_MAGIC:
  55                 code = cmos_read(CMOS_POST_BANK_1_OFFSET);
  56                 break;
  57         case CMOS_POST_BANK_1_MAGIC:
  58                 code = cmos_read(CMOS_POST_BANK_0_OFFSET);
  59                 break;
  60         default:
  61                 return;
  62         }
  63
  64         /* Check last post code in previous boot against normal list */
  65         switch (code) {
  66         case POST_OS_BOOT:
  67         case POST_OS_RESUME:
  68         case POST_ENTER_ELF_BOOT:
  69         case 0:
  70                 break;
  71         default:
  72                 printk(BIOS_WARNING, "POST: Unexpected post code "
  73                        "in previous boot: 0x%02x\n", code);
  74 #if CONFIG_ELOG
  75                 elog_add_event_word(ELOG_TYPE_LAST_POST_CODE, code);
  76 #endif
  77         }
  78 }
  79 #endif /* !__PRE_RAM__ */
  80
  81 static void cmos_post_code(u8 value)
  82 {
  83         switch (cmos_read(CMOS_POST_BANK_OFFSET)) {
  84         case CMOS_POST_BANK_0_MAGIC:
  85                 cmos_write(value, CMOS_POST_BANK_0_OFFSET);
  86                 break;
  87         case CMOS_POST_BANK_1_MAGIC:
  88                 cmos_write(value, CMOS_POST_BANK_1_OFFSET);
  89                 break;
  90         }
  91 }
  92 #endif /* CONFIG_CMOS_POST */
  93
  94 void post_code(uint8_t value)
  95 {
  96 #if !CONFIG_NO_POST
  97 #if CONFIG_CONSOLE_POST
  98         print_emerg("POST: 0x");
  99         print_emerg_hex8(value);
 100         print_emerg("\n");
 101 #endif
 102 #if CONFIG_CMOS_POST
 103         cmos_post_code(value);
 104 #endif
 105 #if CONFIG_IO_POST
 106         outb(value, CONFIG_IO_POST_PORT);
 107 #endif
 108 #endif
 109         mainboard_post(value);
 110 }