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author | Marc Jones <marc.jones@se-eng.com> | 2013-10-29 17:57:30 -0600 |
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committer | Marc Jones <marc.jones@se-eng.com> | 2013-12-04 18:45:13 +0100 |
commit | 54b8e7a0bba7787eca737506cb5d85bf408344d2 (patch) | |
tree | 395e0c0b53505578ac87531d0db67f6dd8a0af07 /src/northbridge/intel/fsp_sandybridge/mrccache.c | |
parent | a5adfed6e33c1cb43971f7fe3f5cfc90e4f42846 (diff) | |
download | coreboot-54b8e7a0bba7787eca737506cb5d85bf408344d2.tar.xz |
Add Intel FSP northbridge support Sandybridge and Ivybridge
Add support for Sandybridge and Ivybridge using the Intel FSP.
The FSP is different enough to warrant its own source files.
This source handle the majority of FSP interaction.
"Intel® Firmware Support Package (Intel® FSP) provides key
programming information for initializing Intel® silicon and can be
easily integrated into a boot loader of the developer’s choice.
It is easy to adopt, scalable to design, reduces time-to-market, and
is economical to build."
http://www.intel.com/content/www/us/en/intelligent-systems/intel-firmware-support-package/intel-fsp-overview.html
Change-Id: Ib879c6b0fbf2eb1cbf929a87f592df29ac48bcc5
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Reviewed-on: http://review.coreboot.org/4015
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/northbridge/intel/fsp_sandybridge/mrccache.c')
-rw-r--r-- | src/northbridge/intel/fsp_sandybridge/mrccache.c | 257 |
1 files changed, 257 insertions, 0 deletions
diff --git a/src/northbridge/intel/fsp_sandybridge/mrccache.c b/src/northbridge/intel/fsp_sandybridge/mrccache.c new file mode 100644 index 0000000000..a793880627 --- /dev/null +++ b/src/northbridge/intel/fsp_sandybridge/mrccache.c @@ -0,0 +1,257 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2012 Google Inc. + * Copyright (C) 2013 Sage Electronic Engineering, LLC. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <stdint.h> +#include <string.h> +#include <bootstate.h> +#include <console/console.h> +#include <cbfs.h> +#include <ip_checksum.h> +#include <device/device.h> +#include <cbmem.h> +#include "northbridge.h" +#include <spi-generic.h> +#include <spi_flash.h> +#include "fsp_util.h" + +/* 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) +{ + u32 region_size; + region_size = CONFIG_MRC_CACHE_SIZE; + *mrc_region_ptr = cbfs_get_file_content(CBFS_DEFAULT_MEDIA, + "mrc.cache", 0xac); + + 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 MRC 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: MRC 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 !defined(__PRE_RAM__) +/* 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; +} + +static void update_mrc_cache(void *unused) +{ + printk(BIOS_DEBUG, "Updating MRC 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 MRC cache in cbmem. Can't update flash.\n"); + return; + } + if (current->mrc_data_size == -1) { + printk(BIOS_ERR, "MRC cache data in cbmem invalid.\n"); + return; + } + + cache_size = get_mrc_cache_region(&cache_base); + if (cache_base == NULL) { + printk(BIOS_ERR, "%s: could not find MRC 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, 1000000, SPI_MODE_3); + 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); +} + +static void find_fsp_hob(void *unused) +{ + /* Set the global HOB list pointer */ + FspHobListPtr = (void*)*((u32*) cbmem_find(CBMEM_ID_HOB_POINTER)); + + if (!FspHobListPtr){ + printk(BIOS_ERR, "ERROR: Could not find FSP HOB pointer in CBFS!\n"); + } else { + /* 0x0000: Print all types */ + print_hob_type_structure(0x000, FspHobListPtr); + + #if CONFIG_ENABLE_FAST_BOOT + save_mrc_data(FspHobListPtr); + update_mrc_cache(NULL); + #endif + } +} + +BOOT_STATE_INIT_ENTRIES(fsp_hob_find) = { + BOOT_STATE_INIT_ENTRY(BS_WRITE_TABLES, BS_ON_ENTRY, + find_fsp_hob, NULL), +}; +#endif /* !defined(__PRE_RAM__) */ + +struct mrc_data_container *find_current_mrc_cache(void) +{ + struct mrc_data_container *cache_base; + u32 cache_size; + + cache_size = get_mrc_cache_region(&cache_base); + if (cache_base == NULL) { + printk(BIOS_ERR, "%s: could not find MRC 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); +} |