From 9738970c152600798407fd3f4e6703b2df277982 Mon Sep 17 00:00:00 2001 From: Andrey Petrov Date: Thu, 25 Feb 2016 14:15:37 -0800 Subject: drivers/intel/fsp2_0: Add utility functions This adds a set of utility functions that help load and identify FSP blobs. Change-Id: I1d23f60fd1dc8de7966142bcd793289220a1fa5e Signed-off-by: Andrey Petrov Reviewed-on: https://review.coreboot.org/13797 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth --- src/drivers/intel/fsp2_0/util.c | 123 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 123 insertions(+) create mode 100644 src/drivers/intel/fsp2_0/util.c (limited to 'src') diff --git a/src/drivers/intel/fsp2_0/util.c b/src/drivers/intel/fsp2_0/util.c new file mode 100644 index 0000000000..4fd4f689a3 --- /dev/null +++ b/src/drivers/intel/fsp2_0/util.c @@ -0,0 +1,123 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2015 Intel Corp. + * (Written by Alexandru Gagniuc for Intel Corp.) + * (Written by Andrey Petrov 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 +#include +#include +#include +#include +#include +#include + +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->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 = read32(raw_hdr + 32); + hdr->cfg_region_offset = read32(raw_hdr + 36); + hdr->cfg_region_size = read32(raw_hdr + 40); + 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; +} + +void fsp_print_header_info(const struct fsp_header *hdr) +{ + printk(BIOS_DEBUG, "Revision %u, image ID: %s, base 0x%lx + 0x%zx\n", + hdr->revision, hdr->image_id, hdr->image_base, hdr->image_size); + printk(BIOS_DEBUG, "\tConfig region 0x%zx + 0x%zx\n", + hdr->cfg_region_offset, hdr->cfg_region_size); + + if (hdr->image_attribute & FSP_HDR_ATTRIB_FSPM) { + printk(BIOS_DEBUG, "\tMemory init offset 0x%zx\n", + hdr->memory_init_entry_offset); + } + + if (hdr->image_attribute & FSP_HDR_ATTRIB_FSPS) { + printk(BIOS_DEBUG, "\tSilicon init offset 0x%zx\n", + hdr->silicon_init_entry_offset); + printk(BIOS_DEBUG, "\tNotify phase offset 0x%zx\n", + hdr->notify_phase_entry_offset); + } + +} + +enum cb_err fsp_load_binary(struct fsp_header *hdr, + const char *name, + struct range_entry *range) +{ + struct cbfsf file_desc; + struct region_device file_data; + void *membase; + + if (cbfs_boot_locate(&file_desc, name, NULL)) { + printk(BIOS_ERR, "Could not locate %s in CBFS\n", name); + return CB_ERR; + } + + cbfs_file_data(&file_data, &file_desc); + + /* Map just enough of the file to be able to parse the header. */ + membase = rdev_mmap(&file_data, FSP_HDR_OFFSET, FSP_HDR_LEN); + if (fsp_identify(hdr, membase) != CB_SUCCESS) { + printk(BIOS_ERR, "%s did not have a valid FSP header\n", name); + return CB_ERR; + } + + fsp_print_header_info(hdr); + + /* Check if size specified in the header matches the cbfs file size */ + if (region_device_sz(&file_data) < hdr->image_size) { + printk(BIOS_ERR, "%s size bigger than cbfs file.\n", name); + return CB_ERR; + } + + /* Check if the binary load address is within expected range */ + if (range_entry_base(range) > hdr->image_base || + range_entry_end(range) <= hdr->image_base + hdr->image_size) { + printk(BIOS_ERR, "%s is outside of allowed range\n", name); + return CB_ERR; + } + + /* Load binary into memory. */ + if (rdev_readat(&file_data, (void *)hdr->image_base, 0, hdr->image_size) < 0) + return CB_ERR; + + return CB_SUCCESS; +} -- cgit v1.2.3