75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
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/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2015 Intel Corp.
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* (Written by Andrey Petrov <andrey.petrov@intel.com> for Intel Corp.)
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* (Written by Alexandru Gagniuc <alexandrux.gagniuc@intel.com> for Intel Corp.)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <boot_device.h>
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#include <cbfs.h>
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#include <commonlib/region.h>
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#include <console/console.h>
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#include <fmap.h>
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/* The 128 KiB right below 4G are decoded by readonly SRAM, not boot media */
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#define IFD_BIOS_MAX_MAPPED (CONFIG_IFD_BIOS_END - 128 * KiB)
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#define IFD_MAPPED_SIZE (IFD_BIOS_MAX_MAPPED - CONFIG_IFD_BIOS_START)
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#define IFD_BIOS_SIZE (CONFIG_IFD_BIOS_END - CONFIG_IFD_BIOS_START)
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/*
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* If Apollo Lake is configured to boot from SPI flash "BIOS" region
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* (as defined in descriptor) is mapped below 4GiB. Form a pointer for
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* the base.
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*/
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#define VIRTUAL_ROM_BASE ((uintptr_t)(0x100000000ULL - IFD_BIOS_SIZE))
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static const struct mem_region_device shadow_dev = MEM_REGION_DEV_INIT(
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VIRTUAL_ROM_BASE, IFD_BIOS_MAX_MAPPED
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);
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/*
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* This is how we translate physical SPI flash address space into CPU memory-mapped space. In
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* essence this means "BIOS" region (usually starts at flash physical 0x1000 is mapped to
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* 4G - IFD_BIOS_SIZE.
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*/
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static const struct xlate_region_device real_dev = XLATE_REGION_INIT(
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&shadow_dev.rdev, CONFIG_IFD_BIOS_START,
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IFD_MAPPED_SIZE, CONFIG_ROM_SIZE
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);
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const struct region_device *boot_device_ro(void)
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{
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return &real_dev.rdev;
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}
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static int iafw_boot_region_properties(struct cbfs_props *props)
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{
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struct region regn;
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/* use fmap to locate CBFS area */
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if (fmap_locate_area("COREBOOT", ®n))
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return -1;
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props->offset = region_offset(®n);
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props->size = region_sz(®n);
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printk(BIOS_DEBUG, "CBFS @ %zx size %zx\n", props->offset, props->size);
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return 0;
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}
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/*
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* Named cbfs_master_header_locator so that it overrides the default, but
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* incompatible locator in cbfs.c
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*/
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const struct cbfs_locator cbfs_master_header_locator = {
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.name = "IAFW Locator",
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.locate = iafw_boot_region_properties,
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};
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