diff options
Diffstat (limited to 'src/drivers/intel/fsp1_1/fastboot_cache.c')
-rw-r--r-- | src/drivers/intel/fsp1_1/fastboot_cache.c | 258 |
1 files changed, 0 insertions, 258 deletions
diff --git a/src/drivers/intel/fsp1_1/fastboot_cache.c b/src/drivers/intel/fsp1_1/fastboot_cache.c deleted file mode 100644 index 9aa8a649e6..0000000000 --- a/src/drivers/intel/fsp1_1/fastboot_cache.c +++ /dev/null @@ -1,258 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright (C) 2012 Google Inc. - * Copyright (C) 2013-2014 Sage Electronic Engineering, LLC. - * Copyright (C) 2015 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; version 2 of the License. - * - * 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. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc. - */ - -#include <cbfs.h> -#include <cbmem.h> -#include <console/console.h> -#include "fsp_util.h" -#include <ip_checksum.h> -#include <lib.h> // hexdump -#include <spi_flash.h> -#include <string.h> - -#ifndef CONFIG_VIRTUAL_ROM_SIZE -#error "CONFIG_VIRTUAL_ROM_SIZE must be set." -#endif - -/* convert a pointer to flash area into the offset inside the flash */ -static inline u32 to_flash_offset(void *p) -{ - return (u32)p + CONFIG_VIRTUAL_ROM_SIZE; -} - -static struct mrc_data_container *next_mrc_block( - struct mrc_data_container *mrc_cache) -{ - /* MRC data blocks are aligned within the region */ - u32 mrc_size = sizeof(*mrc_cache) + mrc_cache->mrc_data_size; - if (mrc_size & (MRC_DATA_ALIGN - 1UL)) { - mrc_size &= ~(MRC_DATA_ALIGN - 1UL); - mrc_size += MRC_DATA_ALIGN; - } - - u8 *region_ptr = (u8 *)mrc_cache; - region_ptr += mrc_size; - return (struct mrc_data_container *)region_ptr; -} - -static int is_mrc_cache(struct mrc_data_container *mrc_cache) -{ - return (!!mrc_cache) - && (mrc_cache->mrc_signature == MRC_DATA_SIGNATURE); -} - -static u32 get_mrc_cache_region(struct mrc_data_container **mrc_region_ptr) -{ - size_t region_size; - *mrc_region_ptr = cbfs_boot_map_with_leak("mrc.cache", - CBFS_TYPE_MRC_CACHE, - ®ion_size); - - return region_size; -} - -/* - * Find the largest index block in the MRC cache. Return NULL if none is - * found. - */ -static struct mrc_data_container *find_current_mrc_cache_local - (struct mrc_data_container *mrc_cache, u32 region_size) -{ - u32 region_end; - u32 entry_id = 0; - struct mrc_data_container *mrc_next = mrc_cache; - - region_end = (u32) mrc_cache + region_size; - - /* Search for the last filled entry in the region */ - while (is_mrc_cache(mrc_next)) { - entry_id++; - mrc_cache = mrc_next; - mrc_next = next_mrc_block(mrc_next); - if ((u32)mrc_next >= region_end) { - /* Stay in the MRC data region */ - break; - } - } - - if (entry_id == 0) { - printk(BIOS_ERR, "%s: No valid fast boot cache found.\n", - __func__); - return NULL; - } - - /* Verify checksum */ - if (mrc_cache->mrc_checksum != - compute_ip_checksum(mrc_cache->mrc_data, - mrc_cache->mrc_data_size)) { - printk(BIOS_ERR, "%s: fast boot cache checksum mismatch\n", - __func__); - return NULL; - } - - printk(BIOS_DEBUG, "%s: picked entry %u from cache block\n", __func__, - entry_id - 1); - - return mrc_cache; -} - -/* SPI code needs malloc/free. - * Also unknown if writing flash from XIP-flash code is a good idea - */ -#if ENV_RAMSTAGE -/* find the first empty block in the MRC cache area. - * If there's none, return NULL. - * - * @mrc_cache_base - base address of the MRC cache area - * @mrc_cache - current entry (for which we need to find next) - * @region_size - total size of the MRC cache area - */ -static struct mrc_data_container *find_next_mrc_cache - (struct mrc_data_container *mrc_cache_base, - struct mrc_data_container *mrc_cache, - u32 region_size) -{ - u32 region_end = (u32) mrc_cache_base + region_size; - u32 mrc_data_size = mrc_cache->mrc_data_size; - - mrc_cache = next_mrc_block(mrc_cache); - if (((u32)mrc_cache + mrc_data_size) >= region_end) { - /* Crossed the boundary */ - mrc_cache = NULL; - printk(BIOS_DEBUG, "%s: no available entries found\n", - __func__); - } else { - printk(BIOS_DEBUG, - "%s: picked next entry from cache block at %p\n", - __func__, mrc_cache); - } - - return mrc_cache; -} - -void update_mrc_cache(void *unused) -{ - printk(BIOS_DEBUG, "Updating fast boot cache data.\n"); - struct mrc_data_container *current = cbmem_find(CBMEM_ID_MRCDATA); - struct mrc_data_container *cache, *cache_base; - u32 cache_size; - - if (!current) { - printk(BIOS_ERR, "No fast boot cache in cbmem. Can't update flash.\n"); - return; - } - if (current->mrc_data_size == -1) { - printk(BIOS_ERR, "Fast boot cache data in cbmem invalid.\n"); - return; - } - - cache_base = NULL; - cache_size = get_mrc_cache_region(&cache_base); - if (cache_base == NULL) { - printk(BIOS_ERR, "%s: could not find fast boot cache area\n", - __func__); - return; - } - - /* - * we need to: - * 0. compare MRC data to last mrc-cache block (exit if same) - */ - cache = find_current_mrc_cache_local(cache_base, cache_size); - - if (cache && (cache->mrc_data_size == current->mrc_data_size) && - (memcmp(cache, current, cache->mrc_data_size) == 0)) { - printk(BIOS_DEBUG, - "MRC data in flash is up to date. No update.\n"); - return; - } - - /* 1. use spi_flash_probe() to find the flash, then... */ - spi_init(); - struct spi_flash *flash = spi_flash_probe(0, 0); - if (!flash) { - printk(BIOS_DEBUG, "Could not find SPI device\n"); - return; - } - - /* 2. look up the first unused block */ - if (cache) - cache = find_next_mrc_cache(cache_base, cache, cache_size); - - /* - * 3. if no such place exists, erase entire mrc-cache range & use - * block 0. First time around the erase is not needed, but this is a - * small overhead for simpler code. - */ - if (!cache) { - printk(BIOS_DEBUG, - "Need to erase the MRC cache region of %d bytes at %p\n", - cache_size, cache_base); - - flash->erase(flash, to_flash_offset(cache_base), cache_size); - - /* we will start at the beginning again */ - cache = cache_base; - } - /* 4. write mrc data with flash->write() */ - printk(BIOS_DEBUG, "Write MRC cache update to flash at %p\n", - cache); - flash->write(flash, to_flash_offset(cache), - current->mrc_data_size + sizeof(*current), current); -} - -#endif /* ENV_RAMSTAGE */ - -void *find_and_set_fastboot_cache(void) -{ - struct mrc_data_container *mrc_cache = NULL; - mrc_cache = find_current_mrc_cache(); - if ((mrc_cache == NULL) || - (mrc_cache->mrc_data_size == -1UL)) { - printk(BIOS_DEBUG, "FSP MRC cache not present.\n"); - return NULL; - } - printk(BIOS_DEBUG, "FSP MRC cache present at %x.\n", (u32)mrc_cache); - printk(BIOS_SPEW, "Saved MRC data:\n"); - hexdump32(BIOS_SPEW, (void *)mrc_cache->mrc_data, - mrc_cache->mrc_data_size); - return (void *) mrc_cache->mrc_data; -} - -struct mrc_data_container *find_current_mrc_cache(void) -{ - struct mrc_data_container *cache_base; - u32 cache_size; - - cache_base = NULL; - cache_size = get_mrc_cache_region(&cache_base); - if (cache_base == NULL) { - printk(BIOS_ERR, "%s: could not find fast boot cache area\n", - __func__); - return NULL; - } - - /* - * we need to: - * 0. compare MRC data to last mrc-cache block (exit if same) - */ - return find_current_mrc_cache_local(cache_base, cache_size); -} |