/* * This file is part of the coreboot project. * * Copyright (C) 2015 Timothy Pearson <tpearson@raptorengineeringinc.com>, Raptor Engineering * Copyright (C) 2014 Edward O'Callaghan <eocallaghan@alterapraxis.com> * * 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. */ #include <arch/io.h> #include <pc80/mc146818rtc.h> void bootblock_mainboard_init(void) { uint8_t recovery_enabled; unsigned char addr; unsigned char byte; bootblock_northbridge_init(); bootblock_southbridge_init(); /* Recovery jumper is connected to SP5100 GPIO61, and clears the GPIO when placed in the Recovery position */ byte = pci_io_read_config8(PCI_DEV(0, 0x14, 0), 0x56); byte |= 0x1 << 4; /* Set GPIO61 to input mode */ pci_io_write_config8(PCI_DEV(0, 0x14, 0), 0x56, byte); recovery_enabled = (!(pci_io_read_config8(PCI_DEV(0, 0x14, 0), 0x57) & 0x1)); if (recovery_enabled) { #if CONFIG_USE_OPTION_TABLE /* Clear NVRAM checksum */ for (addr = LB_CKS_RANGE_START; addr <= LB_CKS_RANGE_END; addr++) { cmos_write(0x0, addr); } /* Set fallback boot */ byte = cmos_read(RTC_BOOT_BYTE); byte &= 0xfc; cmos_write(byte, RTC_BOOT_BYTE); #else /* FIXME * Figure out how to recover if the option table is not available */ #endif } }