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-rw-r--r--util/cbfstool/fit.c707
1 files changed, 590 insertions, 117 deletions
diff --git a/util/cbfstool/fit.c b/util/cbfstool/fit.c
index aeb1755032..86dde4d23d 100644
--- a/util/cbfstool/fit.c
+++ b/util/cbfstool/fit.c
@@ -2,6 +2,8 @@
* Firmware Interface Table support.
*
* Copyright (C) 2012 Google Inc.
+ * Copyright (C) 2019 9elements Agency GmbH
+ * Copyright (C) 2019 Facebook 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
@@ -25,17 +27,42 @@
#define FIT_POINTER_LOCATION 0xffffffc0
#define FIT_TABLE_LOWEST_ADDRESS ((uint32_t)(-(16 << 20)))
#define FIT_ENTRY_CHECKSUM_VALID 0x80
-#define FIT_TYPE_HEADER 0x0
-#define FIT_HEADER_VERSION 0x0100
-#define FIT_HEADER_ADDRESS "_FIT_ "
-#define FIT_TYPE_MICROCODE 0x1
-#define FIT_MICROCODE_VERSION 0x0100
+#define FIT_HEADER_VERSION 0x0100
+#define FIT_HEADER_ADDRESS "_FIT_ "
+#define FIT_MICROCODE_VERSION 0x0100
+#define FIT_TXT_VERSION 0x0100
+
+#define FIT_SIZE_ALIGNMENT 16
struct fit_entry {
+ /**
+ * Address is the base address of the firmware component
+ * must be aligned on 16 byte boundary
+ */
uint64_t address;
+ /**
+ * Size is the span of the component in multiple of 16 bytes
+ * Bits [24:31] are reserved and must be set to 0
+ */
uint32_t size_reserved;
+ /**
+ * Component's version number in binary coded decimal (BCD) format.
+ * For the FIT header entry, the value in this field will indicate the
+ * revision number of the FIT data structure. The upper byte of the
+ * revision field indicates the major revision and the lower byte
+ * indicates the minor revision.
+ */
uint16_t version;
+ /**
+ * FIT types 0x00 to 0x7F
+ * Bit 7 (C_V) indicates whether component has valid checksum.
+ */
uint8_t type_checksum_valid;
+ /**
+ * Component's checksum. The modulo sum of all the bytes in the
+ * component and the value in this field (Chksum) must add up to zero.
+ * This field is only valid if the C_V flag is non-zero.
+ */
uint8_t checksum;
} __packed;
@@ -67,20 +94,20 @@ static inline void *rom_buffer_pointer(struct buffer *buffer, int offset)
return &buffer->data[offset];
}
-static inline int fit_entry_size_bytes(struct fit_entry *entry)
+static inline size_t fit_entry_size_bytes(const struct fit_entry *entry)
{
return (entry->size_reserved & 0xffffff) << 4;
}
static inline void fit_entry_update_size(struct fit_entry *entry,
- int size_bytes)
+ const int size_bytes)
{
/* Size is multiples of 16 bytes. */
entry->size_reserved = (size_bytes >> 4) & 0xffffff;
}
static inline void fit_entry_add_size(struct fit_entry *entry,
- int size_bytes)
+ const int size_bytes)
{
int size = fit_entry_size_bytes(entry);
size += size_bytes;
@@ -114,8 +141,70 @@ static inline uint32_t offset_to_ptr(fit_offset_converter_t helper,
return -helper(region, offset);
}
+/*
+ * Return the number of FIT entries.
+ */
+static inline size_t fit_table_entries(const struct fit_table *fit)
+{
+ if (!fit)
+ return 0;
+
+ return (fit_entry_size_bytes(&fit->header) / FIT_SIZE_ALIGNMENT) - 1;
+}
+
+/*
+ * Return the number of unused entries.
+ */
+static inline size_t fit_free_space(struct fit_table *fit,
+ const size_t max_entries)
+{
+ if (!fit)
+ return 0;
+
+ return max_entries - fit_table_entries(fit);
+}
+
+/*
+ * Sort entries by type and fill gaps (entries with type unused).
+ * To be called after adding or deleting entries.
+ *
+ * This one is critical, as mentioned in Chapter 1.2.1 "FIT Ordering Rules"
+ * "Firmware Interface Table BIOS Specification".
+ *
+ * We need to use a stable sorting algortihm, as the order of
+ * FIT_TYPE_BIOS_STARTUP matter for measurements.
+ */
+static void sort_fit_table(struct fit_table *fit)
+{
+ struct fit_entry tmp;
+ size_t i, j;
+ int swapped;
+
+ /* Bubble sort entries */
+ for (j = 0; j < fit_table_entries(fit) - 1; j++) {
+ swapped = 0;
+ for (i = 0; i < fit_table_entries(fit) - j - 1; i++) {
+ if (fit->entries[i].type_checksum_valid <=
+ fit->entries[i + 1].type_checksum_valid)
+ continue;
+ /* SWAP entries */
+ memcpy(&tmp, &fit->entries[i], sizeof(tmp));
+ memcpy(&fit->entries[i], &fit->entries[i + 1],
+ sizeof(fit->entries[i]));
+ memcpy(&fit->entries[i + 1], &tmp,
+ sizeof(fit->entries[i + 1]));
+ swapped = 1;
+ }
+ if (!swapped)
+ break;
+ }
+}
+
static int fit_table_verified(struct fit_table *table)
{
+ if (!table)
+ return 0;
+
/* Check that the address field has the proper signature. */
if (strncmp((const char *)&table->header.address, FIT_HEADER_ADDRESS,
sizeof(table->header.address)))
@@ -127,35 +216,17 @@ static int fit_table_verified(struct fit_table *table)
if (fit_entry_type(&table->header) != FIT_TYPE_HEADER)
return 0;
- /* Assume that the FIT table only contains the header */
- if (fit_entry_size_bytes(&table->header) != sizeof(struct fit_entry))
+ /* Assume that the FIT table contains at least the header */
+ if (fit_entry_size_bytes(&table->header) < sizeof(struct fit_entry))
return 0;
return 1;
}
-static struct fit_table *locate_fit_table(fit_offset_converter_t offset_helper,
- struct buffer *buffer)
-{
- struct fit_table *table;
- uint32_t *fit_pointer;
-
- fit_pointer = rom_buffer_pointer(buffer,
- ptr_to_offset(offset_helper, buffer,
- FIT_POINTER_LOCATION));
-
- /* Ensure pointer is below 4GiB and within 16MiB of 4GiB */
- if (fit_pointer[1] != 0 || fit_pointer[0] < FIT_TABLE_LOWEST_ADDRESS)
- return NULL;
-
- table = rom_buffer_pointer(buffer,
- ptr_to_offset(offset_helper, buffer, *fit_pointer));
- if (!fit_table_verified(table))
- return NULL;
- else
- return table;
-}
-
+/*
+ * Update the FIT checksum.
+ * To be called after modifiying the table.
+ */
static void update_fit_checksum(struct fit_table *fit)
{
int size_bytes;
@@ -163,6 +234,9 @@ static void update_fit_checksum(struct fit_table *fit)
uint8_t result;
int i;
+ if (!fit)
+ return;
+
fit->header.checksum = 0;
size_bytes = fit_entry_size_bytes(&fit->header);
result = 0;
@@ -172,92 +246,68 @@ static void update_fit_checksum(struct fit_table *fit)
fit->header.checksum = -result;
}
-static void update_fit_ucode_entry(struct fit_table *fit,
- struct fit_entry *entry, uint64_t mcu_addr)
-{
- entry->address = mcu_addr;
- /*
- * While loading MCU, its size is not referred from FIT and
- * rather from the MCU header, hence we can assign zero here
- */
- entry->size_reserved = 0x0000;
- entry->type_checksum_valid = FIT_TYPE_MICROCODE;
- entry->version = FIT_MICROCODE_VERSION;
- entry->checksum = 0;
- fit_entry_add_size(&fit->header, sizeof(struct fit_entry));
-}
-
-static void add_microcodde_entries(struct fit_table *fit,
- const struct cbfs_image *image,
- int num_mcus, struct microcode_entry *mcus,
- fit_offset_converter_t offset_helper,
- uint32_t first_mcu_addr)
-{
- int i = 0;
- /*
- * Check if an entry has to be forced into the FIT at index 0.
- * first_mcu_addr is an address (in ROM) that will point to a
- * microcode patch.
- */
- if (first_mcu_addr) {
- struct fit_entry *entry = &fit->entries[0];
- update_fit_ucode_entry(fit, entry, first_mcu_addr);
- i = 1;
- }
-
- struct microcode_entry *mcu = &mcus[0];
- for (; i < num_mcus; i++) {
- struct fit_entry *entry = &fit->entries[i];
- update_fit_ucode_entry(fit, entry, offset_to_ptr(offset_helper,
- &image->buffer, mcu->offset));
- mcu++;
- }
-}
-
-static void cbfs_file_get_header(struct buffer *buf, struct cbfs_file *file)
+/*
+ * Return a pointer to the next free entry.
+ * Caller must take care if enough space is available.
+ */
+static struct fit_entry *get_next_free_entry(struct fit_table *fit)
{
- bgets(buf, &file->magic, sizeof(file->magic));
- file->len = xdr_be.get32(buf);
- file->type = xdr_be.get32(buf);
- file->attributes_offset = xdr_be.get32(buf);
- file->offset = xdr_be.get32(buf);
+ return &fit->entries[fit_table_entries(fit)];
}
-static int fit_header(void *ptr, uint32_t *current_offset, uint32_t *file_length)
+static void fit_location_from_cbfs_header(uint32_t *current_offset,
+ uint32_t *file_length, void *ptr)
{
struct buffer buf;
struct cbfs_file header;
+ memset(&buf, 0, sizeof(buf));
+
buf.data = ptr;
buf.size = sizeof(header);
- cbfs_file_get_header(&buf, &header);
+
+ bgets(&buf, header.magic, sizeof(header.magic));
+ header.len = xdr_be.get32(&buf);
+ header.type = xdr_be.get32(&buf);
+ header.attributes_offset = xdr_be.get32(&buf);
+ header.offset = xdr_be.get32(&buf);
+
*current_offset = header.offset;
*file_length = header.len;
- return 0;
}
-static int parse_microcode_blob(struct cbfs_image *image,
- struct cbfs_file *mcode_file,
- struct microcode_entry *mcus,
- int total_entries, int *mcus_found)
+static int
+parse_microcode_blob(struct cbfs_image *image,
+ const char *blob_name,
+ size_t *mcus_found,
+ struct microcode_entry *mcus,
+ const size_t max_fit_entries)
{
- int num_mcus;
+ size_t num_mcus;
uint32_t current_offset;
uint32_t file_length;
+ struct cbfs_file *mcode_file;
+
+ mcode_file = cbfs_get_entry(image, blob_name);
+ if (!mcode_file)
+ return 1;
- fit_header(mcode_file, &current_offset, &file_length);
- current_offset += (int)((char *)mcode_file - image->buffer.data);
+ fit_location_from_cbfs_header(&current_offset, &file_length,
+ mcode_file);
+ current_offset += cbfs_get_entry_addr(image, mcode_file);
num_mcus = 0;
- while (file_length > sizeof(struct microcode_header))
- {
+ while (file_length > sizeof(struct microcode_header)) {
const struct microcode_header *mcu_header;
mcu_header = rom_buffer_pointer(&image->buffer, current_offset);
+ if (!mcu_header) {
+ ERROR("Couldn't parse microcode header.\n");
+ return 1;
+ }
/* Newer microcode updates include a size field, whereas older
* containers set it at 0 and are exactly 2048 bytes long */
- uint32_t total_size = mcu_header->total_size
- ? mcu_header->total_size : 2048;
+ uint32_t total_size = mcu_header->total_size ?: 2048;
/* Quickly sanity check a prospective microcode update. */
if (total_size < sizeof(*mcu_header))
@@ -271,9 +321,8 @@ static int parse_microcode_blob(struct cbfs_image *image,
current_offset += mcus[num_mcus].size;
file_length -= mcus[num_mcus].size;
num_mcus++;
-
/* Reached limit of FIT entries. */
- if (num_mcus == total_entries)
+ if (num_mcus == max_fit_entries)
break;
if (file_length < sizeof(struct microcode_header))
break;
@@ -285,42 +334,466 @@ static int parse_microcode_blob(struct cbfs_image *image,
return 0;
}
+/* There can be zero or more FIT_TYPE_MICROCODE entries */
+static void update_fit_ucode_entry(struct fit_table *fit,
+ struct fit_entry *entry,
+ const uint64_t mcu_addr)
+{
+ entry->address = mcu_addr;
+ /*
+ * While loading MCU, its size is not referred from FIT and
+ * rather from the MCU header, hence we can assign zero here.
+ */
+ entry->size_reserved = 0;
+ entry->type_checksum_valid = FIT_TYPE_MICROCODE;
+ entry->version = FIT_MICROCODE_VERSION;
+ entry->checksum = 0;
+ fit_entry_add_size(&fit->header, sizeof(struct fit_entry));
+}
+
+/*
+ * There can be zero or one FIT_TYPE_BIOS_ACM entry per table.
+ * In case there's a FIT_TYPE_BIOS_ACM entry, at least one
+ * FIT_TYPE_BIOS_STARTUP entry must exist.
+ *
+ * The caller has to provide valid arguments as those aren't verfied.
+ */
+static void update_fit_bios_acm_entry(struct fit_table *fit,
+ struct fit_entry *entry,
+ const uint64_t acm_addr)
+{
+ entry->address = acm_addr;
+ /*
+ * The Address field points to a BIOS ACM. The Address field points to
+ * the first byte of the AC module header. When BIOS ACM is loaded in
+ * Authenticated Code RAM, one MTRR base/limit pair is used to map it.
+ */
+ entry->size_reserved = 0;
+ entry->type_checksum_valid = FIT_TYPE_BIOS_ACM;
+ entry->version = FIT_TXT_VERSION;
+ entry->checksum = 0;
+ fit_entry_add_size(&fit->header, sizeof(struct fit_entry));
+}
+
+/*
+ * In case there's a FIT_TYPE_BIOS_ACM entry, at least one
+ * FIT_TYPE_BIOS_STARTUP entry must exist.
+ *
+ * The caller has to provide valid arguments as those aren't verfied.
+ */
+static void update_fit_bios_startup_entry(struct fit_table *fit,
+ struct fit_entry *entry,
+ const uint64_t sm_addr,
+ const uint32_t sm_size)
+{
+ entry->address = sm_addr;
+ assert(sm_size % 16 == 0);
+ /*
+ * BIOS Startup code is defined as the code that gets control at the
+ * reset vector and continues the chain of trust in TCG-compliant
+ * fashion. In addition, this code may also configure memory and SMRAM.
+ */
+ fit_entry_update_size(entry, sm_size);
+ entry->type_checksum_valid = FIT_TYPE_BIOS_STARTUP;
+ entry->version = FIT_TXT_VERSION;
+ entry->checksum = 0;
+ fit_entry_add_size(&fit->header, sizeof(struct fit_entry));
+}
+
+/*
+ * There can be zero or one FIT_TYPE_BIOS_POLICY Record in the FIT.
+ * If the platform uses the hash comparison method and employs a
+ * failsafe bootblock, one FIT_TYPE_BIOS_POLICY entry is needed to
+ * contain the failsafe hash.
+ * If the platform uses the Signature verification method, one
+ * FIT_TYPE_BIOS_POLICY entry is needed. In this case, the entry
+ * contains the OEM key, hash of the BIOS and signature over the hash
+ * using the OEM key.
+ * In all other cases, the FIT_TYPE_BIOS_POLICY record is not required.
+ *
+ * The caller has to provide valid arguments as those aren't verfied.
+ */
+static void update_fit_bios_policy_entry(struct fit_table *fit,
+ struct fit_entry *entry,
+ const uint64_t lcp_policy_addr,
+ const uint32_t lcp_policy_size)
+{
+ entry->address = lcp_policy_addr;
+ fit_entry_update_size(entry, lcp_policy_size);
+ entry->type_checksum_valid = FIT_TYPE_BIOS_POLICY;
+ entry->version = FIT_TXT_VERSION;
+ entry->checksum = 0;
+ fit_entry_add_size(&fit->header, sizeof(struct fit_entry));
+}
+
+/*
+ * There can be zero or one FIT_TYPE_TXT_POLICY entries
+ *
+ * The caller has to provide valid arguments as those aren't verfied.
+ */
+static void update_fit_txt_policy_entry(struct fit_table *fit,
+ struct fit_entry *entry,
+ uint64_t txt_policy_addr)
+{
+ entry->address = txt_policy_addr;
+ /*
+ * Points to the flag indicating if TXT is enabled on this platform.
+ * If not present, TXT is not disabled by FIT.
+ */
+ entry->size_reserved = 0;
+ entry->type_checksum_valid = FIT_TYPE_TXT_POLICY;
+ entry->version = 0x1;
+ entry->checksum = 0;
+ fit_entry_add_size(&fit->header, sizeof(struct fit_entry));
+}
+
+/* Special case for ucode CBFS file, as it might contain more than one ucode */
+int fit_add_microcode_file(struct fit_table *fit,
+ struct cbfs_image *image,
+ const char *blob_name,
+ fit_offset_converter_t offset_helper,
+ const size_t max_fit_entries)
+{
+ struct microcode_entry *mcus;
+
+ size_t i;
+ size_t mcus_found;
+
+ mcus = malloc(sizeof(*mcus) * max_fit_entries);
+ if (!mcus) {
+ ERROR("Couldn't allocate memory for microcode entries.\n");
+ return 1;
+ }
+
+ if (parse_microcode_blob(image, blob_name, &mcus_found, mcus,
+ max_fit_entries)) {
+ ERROR("Couldn't parse microcode blob.\n");
+ free(mcus);
+ return 1;
+ }
+
+ if (mcus_found > fit_free_space(fit, max_fit_entries)) {
+ ERROR("Maximum of FIT entries reached.\n");
+ free(mcus);
+ return 1;
+ }
+
+ for (i = 0; i < mcus_found; i++) {
+ if (fit_add_entry(fit,
+ offset_to_ptr(offset_helper, &image->buffer,
+ mcus[i].offset),
+ 0,
+ FIT_TYPE_MICROCODE,
+ max_fit_entries)) {
+
+ free(mcus);
+ return 1;
+ }
+ }
+
+ free(mcus);
+ return 0;
+}
+
+/*
+ * Return a pointer to the active FIT.
+ */
+struct fit_table *fit_get_table(struct buffer *bootblock,
+ fit_offset_converter_t offset_fn,
+ uint32_t topswap_size)
+{
+ struct fit_table *fit;
+ uint32_t *fit_pointer;
+
+ fit_pointer = rom_buffer_pointer(bootblock,
+ ptr_to_offset(offset_fn, bootblock,
+ FIT_POINTER_LOCATION));
+
+ /* Ensure pointer is below 4GiB and within 16MiB of 4GiB */
+ if (fit_pointer[1] != 0 || fit_pointer[0] < FIT_TABLE_LOWEST_ADDRESS) {
+ ERROR("FIT not found.\n");
+ return NULL;
+ }
+
+ fit = rom_buffer_pointer(bootblock,
+ ptr_to_offset(offset_fn, bootblock, *fit_pointer));
+ if (!fit_table_verified(fit)) {
+ ERROR("FIT not found.\n");
+ return NULL;
+ }
+
+ if (topswap_size) {
+ struct fit_table *fit2 = (struct fit_table *)((uintptr_t)fit -
+ topswap_size);
+ if (!fit_table_verified(fit2)) {
+ ERROR("second FIT is invalid\n");
+ return NULL;
+ }
+ fit = fit2;
+ }
+
+ DEBUG("Operating on table (0x%x)\n", *fit_pointer - topswap_size);
+
+ return fit;
+}
+
+/*
+ * Dump the current FIT in human readable format to stdout.
+ */
+int fit_dump(struct fit_table *fit)
+{
+ size_t i;
+
+ if (!fit)
+ return 1;
+
+ printf("\n");
+ printf(" FIT table:\n");
+
+ if (fit_table_entries(fit) < 1) {
+ printf(" empty\n\n");
+ return 0;
+ }
+
+ printf(" %-6s %-20s %-16s %-8s\n", "Index", "Type", "Addr", "Size");
+
+ for (i = 0; i < fit_table_entries(fit); i++) {
+ const char *name;
+
+ switch (fit->entries[i].type_checksum_valid) {
+ case FIT_TYPE_MICROCODE:
+ name = "Microcode";
+ break;
+ case FIT_TYPE_BIOS_ACM:
+ name = "BIOS ACM";
+ break;
+ case FIT_TYPE_BIOS_STARTUP:
+ name = "BIOS Startup Module";
+ break;
+ case FIT_TYPE_TPM_POLICY:
+ name = "TPM Policy";
+ break;
+ case FIT_TYPE_BIOS_POLICY:
+ name = "BIOS Policy";
+ break;
+ case FIT_TYPE_TXT_POLICY:
+ name = "TXT Policy";
+ break;
+ case FIT_TYPE_KEY_MANIFEST:
+ name = "Key Manifest";
+ break;
+ case FIT_TYPE_BOOT_POLICY:
+ name = "Boot Policy";
+ break;
+ case FIT_TYPE_CSE_SECURE_BOOT:
+ name = "CSE SecureBoot";
+ break;
+ case FIT_TYPE_TXTSX_POLICY:
+ name = "TXTSX policy";
+ break;
+ case FIT_TYPE_JMP_DEBUG_POLICY:
+ name = "JMP debug policy";
+ break;
+ case FIT_TYPE_UNUSED:
+ name = "unused";
+ break;
+ default:
+ name = "unknown";
+ }
+
+ printf(" %6zd %-20s 0x%08"PRIx64" 0x%08zx\n", i, name,
+ fit->entries[i].address,
+ fit_entry_size_bytes(&fit->entries[i]));
+ }
+ printf("\n");
+ return 0;
+}
+
+/*
+ * Remove all entries from table.
+ */
+int fit_clear_table(struct fit_table *fit)
+{
+ if (!fit)
+ return 1;
+
+ memset(fit->entries, 0,
+ sizeof(struct fit_entry) * fit_table_entries(fit));
+
+ /* Reset entry counter in header */
+ fit_entry_update_size(&fit->header, sizeof(fit->header));
+
+ update_fit_checksum(fit);
+
+ return 0;
+}
+
+/*
+ * Returns true if the FIT type is know and can be added to the table.
+ */
+int fit_is_supported_type(const enum fit_type type)
+{
+ switch (type) {
+ case FIT_TYPE_MICROCODE:
+ case FIT_TYPE_BIOS_ACM:
+ case FIT_TYPE_BIOS_STARTUP:
+ case FIT_TYPE_BIOS_POLICY:
+ case FIT_TYPE_TXT_POLICY:
+ return 1;
+ case FIT_TYPE_TPM_POLICY:
+ case FIT_TYPE_KEY_MANIFEST:
+ case FIT_TYPE_BOOT_POLICY:
+ default:
+ return 0;
+ }
+}
+
+/*
+ * Adds an known entry to the FIT.
+ * len is optional for same types and might be zero.
+ * offset is an absolute address in 32-bit protected mode address space.
+ */
+int fit_add_entry(struct fit_table *fit,
+ const uint32_t offset,
+ const uint32_t len,
+ const enum fit_type type,
+ const size_t max_fit_entries)
+{
+ struct fit_entry *entry;
+
+ if (!fit) {
+ ERROR("Internal error.");
+ return 1;
+ }
+
+ if (fit_free_space(fit, max_fit_entries) < 1) {
+ ERROR("No space left in FIT.");
+ return 1;
+ }
+
+ if (!fit_is_supported_type(type)) {
+ ERROR("Unsupported FIT type %u\n", type);
+ return 1;
+ }
+
+ DEBUG("Adding new entry type %u at offset %zd\n", type,
+ fit_table_entries(fit));
+
+ entry = get_next_free_entry(fit);
+
+ switch (type) {
+ case FIT_TYPE_MICROCODE:
+ update_fit_ucode_entry(fit, entry, offset);
+ break;
+ case FIT_TYPE_BIOS_ACM:
+ update_fit_bios_acm_entry(fit, entry, offset);
+ break;
+ case FIT_TYPE_BIOS_STARTUP:
+ update_fit_bios_startup_entry(fit, entry, offset, len);
+ break;
+ case FIT_TYPE_BIOS_POLICY:
+ update_fit_bios_policy_entry(fit, entry, offset, len);
+ break;
+ case FIT_TYPE_TXT_POLICY:
+ update_fit_txt_policy_entry(fit, entry, offset);
+ break;
+ default:
+ return 1;
+ }
+
+ sort_fit_table(fit);
+
+ update_fit_checksum(fit);
+
+ return 0;
+}
+
+/*
+ * Delete one entry from table.
+ */
+int fit_delete_entry(struct fit_table *fit,
+ const size_t idx)
+{
+ if (!fit) {
+ ERROR("Internal error.");
+ return 1;
+ }
+
+ if (idx >= fit_table_entries(fit)) {
+ ERROR("Index out of range.");
+ return 1;
+ }
+
+ memset(&fit->entries[idx], 0, sizeof(struct fit_entry));
+
+ fit->entries[idx].type_checksum_valid = FIT_TYPE_UNUSED;
+
+ sort_fit_table(fit);
+
+ /* The unused entry is now the last one */
+ fit_entry_add_size(&fit->header, -(int)sizeof(struct fit_entry));
+
+ update_fit_checksum(fit);
+
+ return 0;
+}
+
+/* Legacy code. TODO: Remove once ifittool is merged. */
+
+static void add_microcodde_entries(struct fit_table *fit,
+ const struct cbfs_image *image,
+ ssize_t num_mcus,
+ struct microcode_entry *mcus,
+ fit_offset_converter_t offset_helper,
+ uint32_t first_mcu_addr)
+{
+ int i = 0;
+ /*
+ * Check if an entry has to be forced into the FIT at index 0.
+ * first_mcu_addr is an address (in ROM) that will point to a
+ * microcode patch.
+ */
+ if (first_mcu_addr) {
+ struct fit_entry *entry = &fit->entries[0];
+ update_fit_ucode_entry(fit, entry, first_mcu_addr);
+ i = 1;
+ }
+
+ struct microcode_entry *mcu = &mcus[0];
+ for (; i < num_mcus; i++) {
+ struct fit_entry *entry = &fit->entries[i];
+ update_fit_ucode_entry(fit, entry, offset_to_ptr(offset_helper,
+ &image->buffer, mcu->offset));
+ mcu++;
+ }
+}
+
int fit_update_table(struct buffer *bootblock, struct cbfs_image *image,
- const char *microcode_blob_name, int empty_entries,
+ const char *microcode_blob_name,
+ unsigned int empty_entries,
fit_offset_converter_t offset_fn, uint32_t topswap_size,
- uint32_t first_mcu_addr)
+ uint32_t first_mcu_addr)
{
struct fit_table *fit, *fit2;
- struct cbfs_file *mcode_file;
struct microcode_entry *mcus;
- int mcus_found;
+ size_t mcus_found;
int ret = 0;
- // struct rom_image image = { .rom = rom, .size = romsize, };
-
- fit = locate_fit_table(offset_fn, bootblock);
+ fit = fit_get_table(bootblock, offset_fn, 0);
if (!fit) {
ERROR("FIT not found.\n");
return 1;
}
- mcode_file = cbfs_get_entry(image, microcode_blob_name);
- if (!mcode_file) {
- ERROR("File '%s' not found in CBFS.\n",
- microcode_blob_name);
- return 1;
- }
-
mcus = malloc(sizeof(*mcus) * empty_entries);
-
if (!mcus) {
- ERROR("Couldn't allocate memory for microcode update entries.\n");
+ ERROR("Couldn't allocate memory for microcode entries.\n");
return 1;
}
- if (parse_microcode_blob(image, mcode_file, mcus, empty_entries,
- &mcus_found)) {
+ if (parse_microcode_blob(image, microcode_blob_name, &mcus_found,
+ mcus, empty_entries)) {
ERROR("Couldn't parse microcode blob.\n");
ret = 1;
goto out;
@@ -333,7 +806,7 @@ int fit_update_table(struct buffer *bootblock, struct cbfs_image *image,
/* A second fit is exactly topswap size away from the bottom one */
if (topswap_size) {
- fit2 = (struct fit_table *)((uintptr_t)fit - topswap_size);
+ fit2 = fit_get_table(bootblock, offset_fn, topswap_size);
if (!fit_table_verified(fit2)) {
ERROR("second FIT is invalid\n");
@@ -343,8 +816,8 @@ int fit_update_table(struct buffer *bootblock, struct cbfs_image *image,
/* Check if we have room for first entry */
if (first_mcu_addr) {
if (mcus_found >= empty_entries) {
- ERROR("No room, blob mcus = %d, total entries = %d\n",
- mcus_found, empty_entries);
+ ERROR("No room, blob mcus = %zd, total entries"
+ " = %d\n", mcus_found, empty_entries);
ret = 1;
goto out;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-29 09:04:51 +0000