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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2015 Intel Corp.
* (Written by Andrey Petrov <andrey.petrov@intel.com> for Intel Corp.)
* (Written by Alexandru Gagniuc <alexandrux.gagniuc@intel.com> for Intel Corp.)
*
* 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 <boot_device.h>
#include <cbfs.h>
#include <commonlib/region.h>
#include <console/console.h>
#include <fmap.h>
#include <soc/intel/common/nvm.h>
/* The 256 KiB right below 4G are decoded by readonly SRAM, not boot media */
#define IFD_BIOS_MAX_MAPPED (CONFIG_IFD_BIOS_END - 256 * KiB)
#define IFD_MAPPED_SIZE (IFD_BIOS_MAX_MAPPED - CONFIG_IFD_BIOS_START)
#define IFD_BIOS_SIZE (CONFIG_IFD_BIOS_END - CONFIG_IFD_BIOS_START)
/*
* If Apollo Lake is configured to boot from SPI flash "BIOS" region
* (as defined in descriptor) is mapped below 4GiB. Form a pointer for
* the base.
*/
#define VIRTUAL_ROM_BASE ((uintptr_t)(0x100000000ULL - IFD_BIOS_SIZE))
static const struct mem_region_device shadow_dev = MEM_REGION_DEV_INIT(
VIRTUAL_ROM_BASE, IFD_BIOS_MAX_MAPPED
);
/*
* This is how we translate physical SPI flash address space into CPU memory-mapped space. In
* essence this means "BIOS" region (usually starts at flash physical 0x1000 is mapped to
* 4G - IFD_BIOS_SIZE.
*/
static const struct xlate_region_device real_dev = XLATE_REGION_INIT(
&shadow_dev.rdev, CONFIG_IFD_BIOS_START,
IFD_MAPPED_SIZE, CONFIG_ROM_SIZE
);
const struct region_device *boot_device_ro(void)
{
return &real_dev.rdev;
}
static int iafw_boot_region_properties(struct cbfs_props *props)
{
struct region regn;
/* use fmap to locate CBFS area */
if (fmap_locate_area("COREBOOT", ®n))
return -1;
props->offset = region_offset(®n);
props->size = region_sz(®n);
printk(BIOS_DEBUG, "CBFS @ %zx size %zx\n", props->offset, props->size);
return 0;
}
/*
* Named cbfs_master_header_locator so that it overrides the default, but
* incompatible locator in cbfs.c
*/
const struct cbfs_locator cbfs_master_header_locator = {
.name = "IAFW Locator",
.locate = iafw_boot_region_properties,
};
uint32_t nvm_mmio_to_flash_offset(void *p)
{
uintptr_t xlate_base;
xlate_base = VIRTUAL_ROM_BASE;
return (uintptr_t)p - xlate_base + CONFIG_IFD_BIOS_START;
}
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