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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2015-2016 Intel Corp.
* (Written by Alexandru Gagniuc <alexandrux.gagniuc@intel.com> for Intel Corp.)
* (Written by Andrey Petrov <andrey.petrov@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.
*/
#include <device/mmio.h>
#include <cf9_reset.h>
#include <console/console.h>
#include <fsp/util.h>
#include <string.h>
static bool looks_like_fsp_header(const uint8_t *raw_hdr)
{
if (memcmp(raw_hdr, FSP_HDR_SIGNATURE, 4)) {
printk(BIOS_ALERT, "Did not find a valid FSP signature\n");
return false;
}
if (read32(raw_hdr + 4) != FSP_HDR_LEN) {
printk(BIOS_ALERT, "FSP header has invalid length\n");
return false;
}
return true;
}
enum cb_err fsp_identify(struct fsp_header *hdr, const void *fsp_blob)
{
const uint8_t *raw_hdr = fsp_blob;
if (!looks_like_fsp_header(raw_hdr))
return CB_ERR;
hdr->spec_version = read8(raw_hdr + 10);
hdr->revision = read8(raw_hdr + 11);
hdr->fsp_revision = read32(raw_hdr + 12);
memcpy(hdr->image_id, raw_hdr + 16, ARRAY_SIZE(hdr->image_id));
hdr->image_id[ARRAY_SIZE(hdr->image_id) - 1] = '\0';
hdr->image_size = read32(raw_hdr + 24);
hdr->image_base = read32(raw_hdr + 28);
hdr->image_attribute = read16(raw_hdr + 32);
hdr->component_attribute = read16(raw_hdr + 34);
hdr->cfg_region_offset = read32(raw_hdr + 36);
hdr->cfg_region_size = read32(raw_hdr + 40);
hdr->temp_ram_init_entry = read32(raw_hdr + 48);
hdr->temp_ram_exit_entry = read32(raw_hdr + 64);
hdr->notify_phase_entry_offset = read32(raw_hdr + 56);
hdr->memory_init_entry_offset = read32(raw_hdr + 60);
hdr->silicon_init_entry_offset = read32(raw_hdr + 68);
return CB_SUCCESS;
}
enum cb_err fsp_validate_component(struct fsp_header *hdr,
const struct region_device *rdev)
{
void *membase;
/* Map just enough of the file to be able to parse the header. */
membase = rdev_mmap(rdev, FSP_HDR_OFFSET, FSP_HDR_LEN);
if (membase == NULL) {
printk(BIOS_CRIT, "Could not mmap() FSP header.\n");
return CB_ERR;
}
if (fsp_identify(hdr, membase) != CB_SUCCESS) {
rdev_munmap(rdev, membase);
printk(BIOS_CRIT, "No valid FSP header\n");
return CB_ERR;
}
rdev_munmap(rdev, membase);
if (IS_ENABLED(CONFIG_DISPLAY_FSP_HEADER))
fsp_print_header_info(hdr);
/* Check if size specified in the header matches the cbfs file size */
if (region_device_sz(rdev) < hdr->image_size) {
printk(BIOS_CRIT, "Component size bigger than cbfs file.\n");
return CB_ERR;
}
return CB_SUCCESS;
}
static bool fsp_reset_requested(uint32_t status)
{
return (status >= FSP_STATUS_RESET_REQUIRED_COLD &&
status <= FSP_STATUS_RESET_REQUIRED_8);
}
void fsp_handle_reset(uint32_t status)
{
if (!fsp_reset_requested(status))
return;
printk(BIOS_SPEW, "FSP: handling reset type %x\n", status);
switch (status) {
case FSP_STATUS_RESET_REQUIRED_COLD:
full_reset();
break;
case FSP_STATUS_RESET_REQUIRED_WARM:
system_reset();
break;
case FSP_STATUS_RESET_REQUIRED_3:
case FSP_STATUS_RESET_REQUIRED_4:
case FSP_STATUS_RESET_REQUIRED_5:
case FSP_STATUS_RESET_REQUIRED_6:
case FSP_STATUS_RESET_REQUIRED_7:
case FSP_STATUS_RESET_REQUIRED_8:
chipset_handle_reset(status);
break;
default:
break;
}
}
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