src/mainboard/asus/kgpe-d16/bootblock.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2015 Timothy Pearson <tpearson@raptorengineeringinc.com>, Raptor Engineering
   5  * Copyright (C) 2014 Edward O'Callaghan <eocallaghan@alterapraxis.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  */
  17
  18 #include <pc80/mc146818rtc.h>
  19
  20 void bootblock_mainboard_init(void)
  21 {
  22         uint8_t recovery_enabled;
  23         unsigned char addr;
  24         unsigned char byte;
  25
  26         bootblock_northbridge_init();
  27         bootblock_southbridge_init();
  28
  29         /* Recovery jumper is connected to SP5100 GPIO61, and clears the GPIO when placed in the Recovery position */
  30         recovery_enabled = (!(pci_read_config8(PCI_DEV(0, 0x14, 0), 0x57) & 0x1));
  31         if (recovery_enabled) {
  32 #if CONFIG_USE_OPTION_TABLE
  33                 /* Clear NVRAM checksum */
  34                 for (addr = LB_CKS_RANGE_START; addr <= LB_CKS_RANGE_END; addr++) {
  35                         cmos_write(0x0, addr);
  36                 }
  37
  38                 /* Set fallback boot */
  39                 byte = cmos_read(RTC_BOOT_BYTE);
  40                 byte &= 0xfc;
  41                 cmos_write(byte, RTC_BOOT_BYTE);
  42 #else
  43                 /* FIXME
  44                  * Figure out how to recover if the option table is not available
  45                  */
  46 #endif
  47         }
  48 }