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Diffstat (limited to 'src/soc/intel/baytrail/mrc_cache.c')
-rw-r--r--src/soc/intel/baytrail/mrc_cache.c300
1 files changed, 0 insertions, 300 deletions
diff --git a/src/soc/intel/baytrail/mrc_cache.c b/src/soc/intel/baytrail/mrc_cache.c
deleted file mode 100644
index f12f3ef0ea..0000000000
--- a/src/soc/intel/baytrail/mrc_cache.c
+++ /dev/null
@@ -1,300 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2013 Google Inc.
- *
- * 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 <string.h>
-#include <console/console.h>
-#include <cbmem.h>
-#include <ip_checksum.h>
-#if CONFIG_CHROMEOS
-#include <vendorcode/google/chromeos/fmap.h>
-#endif
-#include <baytrail/mrc_cache.h>
-
-#define MRC_DATA_ALIGN 0x1000
-#define MRC_DATA_SIGNATURE (('M'<<0)|('R'<<8)|('C'<<16)|('D'<<24))
-
-/* The mrc_data_region describes the larger non-volatile area to store
- * mrc_saved_data objects.*/
-struct mrc_data_region {
- void *base;
- uint32_t size;
-};
-
-/* common code */
-static int mrc_cache_get_region(struct mrc_data_region *region)
-{
-#if CONFIG_CHROMEOS
- int ret;
- ret = find_fmap_entry("RW_MRC_CACHE", &region->base);
- if (ret >= 0) {
- region->size = ret;
- return 0;
- }
-#endif
- region->base = (void *)CONFIG_MRC_SETTINGS_CACHE_BASE;
- region->size = CONFIG_MRC_SETTINGS_CACHE_SIZE;
- return 0;
-}
-
-static int mrc_cache_in_region(const struct mrc_data_region *region,
- const struct mrc_saved_data *cache)
-{
- uintptr_t region_end;
- uintptr_t cache_end;
-
- if ((uintptr_t)cache < (uintptr_t)region->base)
- return 0;
-
- region_end = (uintptr_t)region->base;
- region_end += region->size;
-
- if ((uintptr_t)cache >= region_end)
- return 0;
-
- if ((sizeof(*cache) + (uintptr_t)cache) >= region_end)
- return 0;
-
- cache_end = (uintptr_t)cache;
- cache_end += cache->size + sizeof(*cache);
-
- if (cache_end > region_end)
- return 0;
-
- return 1;
-}
-
-static int mrc_cache_valid(const struct mrc_data_region *region,
- const struct mrc_saved_data *cache)
-{
- uint32_t checksum;
-
- if (cache->signature != MRC_DATA_SIGNATURE)
- return 0;
-
- if (cache->size > region->size)
- return 0;
-
- if (cache->reserved != 0)
- return 0;
-
- checksum = compute_ip_checksum((void *)&cache->data[0], cache->size);
-
- if (cache->checksum != checksum)
- return 0;
-
- return 1;
-}
-
-static const struct mrc_saved_data *
-next_cache_block(const struct mrc_saved_data *cache)
-{
- uintptr_t next = (uintptr_t)cache;
-
- next += ALIGN(cache->size + sizeof(*cache), MRC_DATA_ALIGN);
-
- return (const struct mrc_saved_data *)next;
-}
-
-/* Locate the most recently saved MRC data. */
-static int __mrc_cache_get_current(const struct mrc_data_region *region,
- const struct mrc_saved_data **cache)
-{
- const struct mrc_saved_data *msd;
- const struct mrc_saved_data *verified_cache;
-
- msd = region->base;
-
- verified_cache = NULL;
-
- while (mrc_cache_in_region(region, msd) &&
- mrc_cache_valid(region, msd)) {
- verified_cache = msd;
- msd = next_cache_block(msd);
- }
-
- if (verified_cache == NULL)
- return -1;
-
- *cache = verified_cache;
- return 0;
-}
-
-int mrc_cache_get_current(const struct mrc_saved_data **cache)
-{
- struct mrc_data_region region;
-
- if (mrc_cache_get_region(&region) < 0)
- return -1;
-
- return __mrc_cache_get_current(&region, cache);
-}
-
-#if defined(__PRE_RAM__)
-/* romstage code */
-
-/* Fill in mrc_saved_data structure with payload. */
-static void mrc_cache_fill(struct mrc_saved_data *cache, void *data,
- size_t size)
-{
- cache->signature = MRC_DATA_SIGNATURE;
- cache->size = size;
- cache->reserved = 0;
- memcpy(&cache->data[0], data, size);
- cache->checksum = compute_ip_checksum((void *)&cache->data[0],
- cache->size);
-}
-
-int mrc_cache_stash_data(void *data, size_t size)
-{
- int cbmem_size;
- struct mrc_saved_data *cache;
-
- cbmem_size = sizeof(*cache) + ALIGN(size, 16);
-
- cache = cbmem_add(CBMEM_ID_MRCDATA, cbmem_size);
-
- if (cache == NULL) {
- printk(BIOS_ERR, "No space in cbmem for MRC data.\n");
- return -1;
- }
-
- /* Clear alignment padding bytes at end of data. */
- memset(&cache->data[size], 0, cbmem_size - size - sizeof(*cache));
-
- printk(BIOS_DEBUG, "Relocate MRC DATA from %p to %p (%zu bytes)\n",
- data, cache, size);
-
- mrc_cache_fill(cache, data, size);
-
- return 0;
-}
-
-#else
-/* ramstage code */
-#include <bootstate.h>
-#include <baytrail/nvm.h>
-
-static int mrc_slot_valid(const struct mrc_data_region *region,
- const struct mrc_saved_data *slot,
- const struct mrc_saved_data *to_save)
-{
- uintptr_t region_begin;
- uintptr_t region_end;
- uintptr_t slot_end;
- uintptr_t slot_begin;
- uint32_t size;
-
- region_begin = (uintptr_t)region->base;
- region_end = region_begin + region->size;
- slot_begin = (uintptr_t)slot;
- size = to_save->size + sizeof(*to_save);
- slot_end = slot_begin + size;
-
- if (slot_begin < region_begin || slot_begin >= region_end)
- return 0;
-
- if (size > region->size)
- return 0;
-
- if (slot_end > region_end || slot_end < region_begin)
- return 0;
-
- if (!nvm_is_erased(slot, size))
- return 0;
-
- return 1;
-}
-
-static const struct mrc_saved_data *
-mrc_cache_next_slot(const struct mrc_data_region *region,
- const struct mrc_saved_data *current_slot)
-{
- const struct mrc_saved_data *next_slot;
-
- if (current_slot == NULL) {
- next_slot = region->base;
- } else {
- next_slot = next_cache_block(current_slot);
- }
-
- return next_slot;
-}
-
-static void update_mrc_cache(void *unused)
-{
- const struct mrc_saved_data *current_boot;
- const struct mrc_saved_data *current_saved;
- const struct mrc_saved_data *next_slot;
- struct mrc_data_region region;
-
- printk(BIOS_DEBUG, "Updating MRC cache data.\n");
-
- current_boot = cbmem_find(CBMEM_ID_MRCDATA);
- if (!current_boot) {
- printk(BIOS_ERR, "No MRC cache in cbmem.\n");
- return;
- }
-
- if (mrc_cache_get_region(&region)) {
- printk(BIOS_ERR, "Could not obtain MRC cache region.\n");
- return;
- }
-
- if (!mrc_cache_valid(&region, current_boot)) {
- printk(BIOS_ERR, "MRC cache data in cbmem invalid.\n");
- return;
- }
-
- current_saved = NULL;
-
- if (!__mrc_cache_get_current(&region, &current_saved)) {
- if (current_saved->size == current_boot->size &&
- !memcmp(&current_saved->data[0], &current_boot->data[0],
- current_saved->size)) {
- printk(BIOS_DEBUG, "MRC cache up to date.\n");
- return;
- }
- }
-
- next_slot = mrc_cache_next_slot(&region, current_saved);
-
- if (!mrc_slot_valid(&region, next_slot, current_boot)) {
- printk(BIOS_DEBUG, "Slot @ %p is invalid.\n", next_slot);
- if (!nvm_is_erased(region.base, region.size)) {
- if (nvm_erase(region.base, region.size) < 0) {
- printk(BIOS_DEBUG, "Failure erasing region.\n");
- return;
- }
- }
- next_slot = region.base;
- }
-
- if (nvm_write((void *)next_slot, current_boot,
- current_boot->size + sizeof(*current_boot))) {
- printk(BIOS_DEBUG, "Failure writing MRC cache to %p.\n",
- next_slot);
- }
-}
-
-BOOT_STATE_INIT_ENTRIES(mrc_cache_update) = {
- BOOT_STATE_INIT_ENTRY(BS_WRITE_TABLES, BS_ON_ENTRY,
- update_mrc_cache, NULL),
-};
-
-#endif /* defined(__PRE_RAM__) */
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