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Diffstat (limited to 'firmware/lib/cgptlib/mtdlib.c')
-rw-r--r--firmware/lib/cgptlib/mtdlib.c275
1 files changed, 0 insertions, 275 deletions
diff --git a/firmware/lib/cgptlib/mtdlib.c b/firmware/lib/cgptlib/mtdlib.c
index 18aa7c5a..98662523 100644
--- a/firmware/lib/cgptlib/mtdlib.c
+++ b/firmware/lib/cgptlib/mtdlib.c
@@ -13,51 +13,6 @@
const int kSectorShift = 9; /* 512 bytes / sector. */
-int MtdInit(MtdData *mtd) {
- int ret;
-
- mtd->modified = 0;
- mtd->current_kernel = CGPT_KERNEL_ENTRY_NOT_FOUND;
- mtd->current_priority = 999;
-
- ret = MtdSanityCheck(mtd);
- if (GPT_SUCCESS != ret) {
- VBDEBUG(("MtdInit() failed sanity check\n"));
- return ret;
- }
-
- return GPT_SUCCESS;
-}
-
-int MtdCheckParameters(MtdData *disk) {
- if (disk->sector_bytes != 512) {
- return GPT_ERROR_INVALID_SECTOR_SIZE;
- }
-
- /* At minimum, the disk must consist of at least one erase block */
- if (disk->drive_sectors < disk->flash_block_bytes / disk->sector_bytes) {
- return GPT_ERROR_INVALID_SECTOR_NUMBER;
- }
-
- /* Write pages must be an integer multiple of sector size */
- if (disk->flash_page_bytes == 0 ||
- disk->flash_page_bytes % disk->sector_bytes != 0) {
- return GPT_ERROR_INVALID_FLASH_GEOMETRY;
- }
-
- /* Erase blocks must be an integer multiple of write pages */
- if (disk->flash_block_bytes == 0 ||
- disk->flash_block_bytes % disk->flash_page_bytes != 0) {
- return GPT_ERROR_INVALID_FLASH_GEOMETRY;
- }
-
- /* Without a FTS region, why are you using MTD? */
- if (disk->fts_block_size == 0) {
- return GPT_ERROR_INVALID_FLASH_GEOMETRY;
- }
- return GPT_SUCCESS;
-}
-
int MtdGetEntryPriority(const MtdDiskPartition *e) {
return ((e->flags & MTD_ATTRIBUTE_PRIORITY_MASK) >>
MTD_ATTRIBUTE_PRIORITY_OFFSET);
@@ -77,11 +32,6 @@ int MtdGetEntryType(const MtdDiskPartition *e) {
return ((e->flags & MTD_ATTRIBUTE_TYPE_MASK) >> MTD_ATTRIBUTE_TYPE_OFFSET);
}
-int MtdIsKernelEntry(const MtdDiskPartition *e) {
- return MtdGetEntryType(e) == MTD_PARTITION_TYPE_CHROMEOS_KERNEL;
-}
-
-
static void SetBitfield(MtdDiskPartition *e,
uint32_t offset, uint32_t mask, uint32_t v) {
e->flags = (e->flags & ~mask) | ((v << offset) & mask);
@@ -101,96 +51,6 @@ void MtdSetEntryType(MtdDiskPartition *e, int type) {
SetBitfield(e, MTD_ATTRIBUTE_TYPE_OFFSET, MTD_ATTRIBUTE_TYPE_MASK, type);
}
-void MtdModified(MtdData *mtd) {
- mtd->modified = 1;
- mtd->primary.crc32 = MtdHeaderCrc(&mtd->primary);
-}
-
-int MtdIsPartitionValid(const MtdDiskPartition *part) {
- return MtdGetEntryType(part) != 0;
-}
-
-int MtdCheckEntries(MtdDiskPartition *entries, MtdDiskLayout *h) {
- uint32_t i, j;
-
- for (i = 0; i < MTD_MAX_PARTITIONS; i++) {
- for (j = 0; j < MTD_MAX_PARTITIONS; j++) {
- if (i != j) {
- MtdDiskPartition *entry = entries + i;
- MtdDiskPartition *e2 = entries + j;
- uint64_t start, end;
- uint64_t other_start, other_end;
-
- if (!MtdIsPartitionValid(entry) || !MtdIsPartitionValid(e2))
- continue;
-
- MtdGetPartitionSize(entry, &start, &end, NULL);
- MtdGetPartitionSize(e2, &other_start, &other_end, NULL);
-
- if((start == 0 && end == 0) ||
- (other_start == 0 && other_end == 0)) {
- continue;
- }
-
- if (end > h->last_offset) {
- return GPT_ERROR_OUT_OF_REGION;
- }
- if (start < h->first_offset) {
- return GPT_ERROR_OUT_OF_REGION;
- }
- if (start > end) {
- return GPT_ERROR_OUT_OF_REGION;
- }
-
- if ((start >= other_start) &&
- (start <= other_end)) {
- return GPT_ERROR_START_LBA_OVERLAP;
- }
- if ((end >= other_start) &&
- (end <= other_end)) {
- return GPT_ERROR_END_LBA_OVERLAP;
- }
- }
- }
- }
- return GPT_SUCCESS;
-}
-
-int MtdSanityCheck(MtdData *disk) {
- MtdDiskLayout *h = &disk->primary;
- int ret;
-
- ret = MtdCheckParameters(disk);
- if(GPT_SUCCESS != ret)
- return ret;
-
- if (Memcmp(disk->primary.signature, MTD_DRIVE_SIGNATURE,
- sizeof(disk->primary.signature))) {
- return GPT_ERROR_INVALID_HEADERS;
- }
-
- if (disk->primary.first_offset > disk->primary.last_offset ||
- disk->primary.last_offset > disk->drive_sectors * disk->sector_bytes) {
- return GPT_ERROR_INVALID_SECTOR_NUMBER;
- }
-
- if (h->crc32 != MtdHeaderCrc(h)) {
- return GPT_ERROR_CRC_CORRUPTED;
- }
- if (h->size < MTD_DRIVE_V1_SIZE) {
- return GPT_ERROR_INVALID_HEADERS;
- }
- return MtdCheckEntries(h->partitions, h);
-}
-
-void MtdRepair(MtdData *gpt) {
-
-}
-
-void MtdGetCurrentKernelUniqueGuid(MtdData *gpt, void *dest) {
- Memset(dest, 0, 16);
-}
-
uint32_t MtdHeaderCrc(MtdDiskLayout *h) {
uint32_t crc32, original_crc32;
@@ -230,139 +90,4 @@ void MtdGetPartitionSizeInSectors(const MtdDiskPartition *e, uint64_t *start,
}
-int MtdNextKernelEntry(MtdData *mtd, uint64_t *start_sector, uint64_t *size)
-{
- MtdDiskLayout *header = &mtd->primary;
- MtdDiskPartition *entries = header->partitions;
- MtdDiskPartition *e;
- int new_kernel = CGPT_KERNEL_ENTRY_NOT_FOUND;
- int new_prio = 0;
- uint32_t i;
-
- /*
- * If we already found a kernel, continue the scan at the current
- * kernel's priority, in case there is another kernel with the same
- * priority.
- */
- if (mtd->current_kernel != CGPT_KERNEL_ENTRY_NOT_FOUND) {
- for (i = mtd->current_kernel + 1;
- i < MTD_MAX_PARTITIONS; i++) {
- e = entries + i;
- if (!MtdIsKernelEntry(e))
- continue;
- VBDEBUG(("MtdNextKernelEntry looking at same prio "
- "partition %d\n", i+1));
- VBDEBUG(("MtdNextKernelEntry s%d t%d p%d\n",
- MtdGetEntrySuccessful(e), MtdGetEntryTries(e),
- MtdGetEntryPriority(e)));
- if (!(MtdGetEntrySuccessful(e) || MtdGetEntryTries(e)))
- continue;
- if (MtdGetEntryPriority(e) == mtd->current_priority) {
- MtdGetPartitionSizeInSectors(e, start_sector, NULL, size);
- mtd->current_kernel = i;
- VBDEBUG(("MtdNextKernelEntry likes it\n"));
- return GPT_SUCCESS;
- }
- }
- }
- /*
- * We're still here, so scan for the remaining kernel with the highest
- * priority less than the previous attempt.
- */
- for (i = 0, e = entries; i < MTD_MAX_PARTITIONS; i++, e++) {
- int current_prio = MtdGetEntryPriority(e);
- if (!MtdIsKernelEntry(e))
- continue;
- VBDEBUG(("MtdNextKernelEntry looking at new prio "
- "partition %d\n", i+1));
- VBDEBUG(("MtdNextKernelEntry s%d t%d p%d\n",
- MtdGetEntrySuccessful(e), MtdGetEntryTries(e),
- MtdGetEntryPriority(e)));
- if (!(MtdGetEntrySuccessful(e) || MtdGetEntryTries(e)))
- continue;
- if (current_prio >= mtd->current_priority) {
- /* Already returned this kernel in a previous call */
- continue;
- }
- if (current_prio > new_prio) {
- new_kernel = i;
- new_prio = current_prio;
- }
- }
-
- /*
- * Save what we found. Note that if we didn't find a new kernel,
- * new_prio will still be -1, so future calls to this function will
- * also fail.
- */
- mtd->current_kernel = new_kernel;
- mtd->current_priority = new_prio;
-
- if (CGPT_KERNEL_ENTRY_NOT_FOUND == new_kernel) {
- VBDEBUG(("MtdNextKernelEntry no more kernels\n"));
- return GPT_ERROR_NO_VALID_KERNEL;
- }
-
- VBDEBUG(("MtdNextKernelEntry likes partition %d\n", new_kernel + 1));
- e = entries + new_kernel;
- MtdGetPartitionSizeInSectors(e, start_sector, NULL, size);
-
- return GPT_SUCCESS;
-}
-
-int MtdUpdateKernelEntry(MtdData *mtd, uint32_t update_type)
-{
- MtdDiskLayout *header = &mtd->primary;
- MtdDiskPartition *entries = header->partitions;
- MtdDiskPartition *e = entries + mtd->current_kernel;
- int modified = 0;
-
- if (mtd->current_kernel == CGPT_KERNEL_ENTRY_NOT_FOUND)
- return GPT_ERROR_INVALID_UPDATE_TYPE;
- if (!MtdIsKernelEntry(e))
- return GPT_ERROR_INVALID_UPDATE_TYPE;
-
- switch (update_type) {
- case GPT_UPDATE_ENTRY_TRY: {
- /* Used up a try */
- int tries;
- if (MtdGetEntrySuccessful(e)) {
- /*
- * Successfully booted this partition, so tries field
- * is ignored.
- */
- return GPT_SUCCESS;
- }
- tries = MtdGetEntryTries(e);
- if (tries > 1) {
- /* Still have tries left */
- modified = 1;
- MtdSetEntryTries(e, tries - 1);
- break;
- }
- /* Out of tries, so drop through and mark partition bad. */
- }
- case GPT_UPDATE_ENTRY_BAD: {
- /* Giving up on this partition entirely. */
- if (!MtdGetEntrySuccessful(e)) {
- /*
- * Only clear tries and priority if the successful bit
- * is not set.
- */
- modified = 1;
- MtdSetEntryTries(e, 0);
- MtdSetEntryPriority(e, 0);
- }
- break;
- }
- default:
- return GPT_ERROR_INVALID_UPDATE_TYPE;
- }
-
- if (modified) {
- MtdModified(mtd);
- }
-
- return GPT_SUCCESS;
-}
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