[coreboot-gerrit] Change in coreboot[master]: drivers/vpd: Add VPD support
Patrick Rudolph (Code Review)
gerrit at coreboot.org
Thu Mar 8 15:48:41 CET 2018
Patrick Rudolph has uploaded this change for review. ( https://review.coreboot.org/25046
Change subject: drivers/vpd: Add VPD support
......................................................................
drivers/vpd: Add VPD support
Copy ChromeOS VPD driver to add support for VPD without CROMEOS.
Possible use case:
* Storing calibration data
* Storing MAC address
* Storing serial
* Storing boot options
TODO: Make use of this driver accross all platforms.
Change-Id: Id9263bd39bf25d024e93daa57053fefcb1adc53a
Signed-off-by: Patrick Rudolph <patrick.rudolph at 9elements.com>
---
A src/drivers/vpd/Kconfig
A src/drivers/vpd/Makefile.inc
A src/drivers/vpd/lib_vpd.c
A src/drivers/vpd/lib_vpd.h
A src/drivers/vpd/vpd.c
A src/drivers/vpd/vpd.h
A src/drivers/vpd/vpd_tables.h
7 files changed, 757 insertions(+), 0 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/46/25046/1
diff --git a/src/drivers/vpd/Kconfig b/src/drivers/vpd/Kconfig
new file mode 100644
index 0000000..335b907
--- /dev/null
+++ b/src/drivers/vpd/Kconfig
@@ -0,0 +1,28 @@
+##
+## This file is part of the coreboot project.
+##
+## Copyright (C) 2012 The Chromium OS Authors. All rights reserved.
+##
+## 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.
+##
+
+config VPD
+ bool "Support for Vital Product Data tables"
+ default n
+ help
+ Enable support for flash based vital product data.
+
+if VPD
+
+config VPD_DEBUG
+ bool "Enable VPD debug output"
+ default n
+
+endif
diff --git a/src/drivers/vpd/Makefile.inc b/src/drivers/vpd/Makefile.inc
new file mode 100644
index 0000000..9b4d1f3
--- /dev/null
+++ b/src/drivers/vpd/Makefile.inc
@@ -0,0 +1,2 @@
+ramstage-$(CONFIG_VPD) += vpd.c
+ramstage-$(CONFIG_VPD) += lib_vpd.c
diff --git a/src/drivers/vpd/lib_vpd.c b/src/drivers/vpd/lib_vpd.c
new file mode 100644
index 0000000..a0e4396
--- /dev/null
+++ b/src/drivers/vpd/lib_vpd.c
@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
+ */
+#include <assert.h>
+#include "lib_vpd.h"
+
+/* Given an encoded string, this functions decodes the length field which varies
+ * from 1 byte to many bytes.
+ *
+ * The in points the actual byte going to be decoded. The *length returns
+ * the decoded length field. The number of consumed bytes will be stroed in
+ * decoded_len.
+ *
+ * Returns VPD_FAIL if more bit is 1, but actually reaches the end of string.
+ */
+int decodeLen(const int32_t max_len,
+ const uint8_t *in,
+ int32_t *length,
+ int32_t *decoded_len)
+{
+ uint8_t more;
+ int i = 0;
+
+ assert(length);
+ assert(decoded_len);
+
+ *length = 0;
+ do {
+ if (i >= max_len) return VPD_FAIL;
+ more = in[i] & 0x80;
+ *length <<= 7;
+ *length |= in[i] & 0x7f;
+ ++i;
+ } while (more);
+
+ *decoded_len = i;
+
+ return VPD_OK;
+}
+
+/* Given the encoded string, this function invokes callback with extracted
+ * (key, value). The *consumed will be plused the number of bytes consumed in
+ * this function.
+ *
+ * The input_buf points to the first byte of the input buffer.
+ *
+ * The *consumed starts from 0, which is actually the next byte to be decoded.
+ * It can be non-zero to be used in multiple calls.
+ *
+ * If one entry is successfully decoded, sends it to callback and returns the
+ * result.
+ */
+int decodeVpdString(const int32_t max_len,
+ const uint8_t *input_buf,
+ int32_t *consumed,
+ VpdDecodeCallback callback,
+ void *callback_arg)
+{
+ int type;
+ int32_t key_len, value_len;
+ int32_t decoded_len;
+ const uint8_t *key, *value;
+
+ /* type */
+ if (*consumed >= max_len)
+ return VPD_FAIL;
+
+ type = input_buf[*consumed];
+ switch (type) {
+ case VPD_TYPE_INFO:
+ case VPD_TYPE_STRING:
+ (*consumed)++;
+ /* key */
+ if (VPD_OK != decodeLen(max_len - *consumed,
+ &input_buf[*consumed], &key_len,
+ &decoded_len) ||
+ *consumed + decoded_len >= max_len) {
+ return VPD_FAIL;
+ }
+
+ *consumed += decoded_len;
+ key = &input_buf[*consumed];
+ *consumed += key_len;
+
+ /* value */
+ if (VPD_OK != decodeLen(max_len - *consumed,
+ &input_buf[*consumed],
+ &value_len, &decoded_len) ||
+ *consumed + decoded_len > max_len) {
+ return VPD_FAIL;
+ }
+ *consumed += decoded_len;
+ value = &input_buf[*consumed];
+ *consumed += value_len;
+
+ if (type == VPD_TYPE_STRING)
+ return callback(key, key_len, value, value_len,
+ callback_arg);
+
+ return VPD_OK;
+
+ default:
+ return VPD_FAIL;
+ break;
+ }
+
+ return VPD_OK;
+}
diff --git a/src/drivers/vpd/lib_vpd.h b/src/drivers/vpd/lib_vpd.h
new file mode 100644
index 0000000..7a7566b
--- /dev/null
+++ b/src/drivers/vpd/lib_vpd.h
@@ -0,0 +1,226 @@
+/*
+ * Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
+ */
+
+#ifndef __LIB_VPD__
+#define __LIB_VPD__
+
+#include <inttypes.h>
+
+enum {
+ VPD_OK = 0,
+ VPD_FAIL,
+};
+
+enum {
+ VPD_TYPE_TERMINATOR = 0,
+ VPD_TYPE_STRING,
+ VPD_TYPE_INFO = 0xfe,
+ VPD_TYPE_IMPLICIT_TERMINATOR = 0xff,
+};
+
+enum {
+ VPD_AS_LONG_AS = -1,
+};
+
+enum { /* export_type */
+ VPD_EXPORT_KEY_VALUE = 1,
+ VPD_EXPORT_VALUE,
+ VPD_EXPORT_AS_PARAMETER,
+};
+
+/* Callback for decodeVpdString to invoke. */
+typedef int VpdDecodeCallback(const uint8_t *key, int32_t key_len,
+ const uint8_t *value, int32_t value_len,
+ void *arg);
+
+/* Container data types */
+struct StringPair {
+ uint8_t *key;
+ uint8_t *value;
+ int pad_len;
+ int filter_out; /* TRUE means not exported. */
+ struct StringPair *next;
+};
+
+struct PairContainer {
+ struct StringPair *first;
+};
+
+
+/***********************************************************************
+ * Encode and decode VPD entries
+ ***********************************************************************/
+
+/* Encodes the len into multiple bytes with the following format.
+ *
+ * 7 6 ............ 0
+ * +----+------------------+
+ * |More| Length | ...
+ * +----+------------------+
+ *
+ * The encode_buf points to the actual position we are going to store.
+ * encoded_len will return the exact bytes we encoded in this function.
+ * Returns fail if the buffer is not long enough.
+ */
+int encodeLen(
+ const int32_t len,
+ uint8_t *encode_buf,
+ const int32_t max_len,
+ int32_t *encoded_len);
+
+/* Given an encoded string, this functions decodes the length field which varies
+ * from 1 byte to many bytes.
+ *
+ * The in points the actual byte going to be decoded. The *length returns
+ * the decoded length field. The number of consumed bytes will be stroed in
+ * decoded_len.
+ *
+ * Returns VPD_FAIL if more bit is 1, but actually reaches the end of string.
+ */
+int decodeLen(
+ const int32_t max_len,
+ const uint8_t *in,
+ int32_t *length,
+ int32_t *decoded_len);
+
+
+/* Encodes the terminator.
+ * When calling, the output_buf should point to the start of buffer while
+ * *generated_len should contain how many bytes exist in buffer now.
+ * After return, *generated_len would be plused the number of bytes generated
+ * in this function.
+ */
+int encodeVpdTerminator(
+ const int max_buffer_len,
+ uint8_t *output_buf,
+ int *generated_len);
+
+/* Encodes the given type/key/value pair into buffer.
+ *
+ * The pad_value_len is used to control the output value length.
+ * When pad_value_len > 0, the value is outputted into fixed length (pad \0
+ * if the value is shorter). Truncated if too long.
+ * pad_value_len == VPD_NO_LIMIT, output the value as long as possible.
+ * This is useful when we want to fix the structure layout at beginning.
+ *
+ * The encoded string will be stored in output_buf. If it is longer than
+ * max_buffer_len, this function returns fail. If the buffer is long enough,
+ * the generated_len will be updated.
+ *
+ * When calling, the output_buf should point to the start of buffer while
+ * *generated_len should contain how many bytes exist in buffer now.
+ * After return, *generated_len would be plused the number of bytes generated
+ * in this function.
+ *
+ * The initial value of *generated_len can be non-zero, so that this value
+ * can be used between multiple calls to encodeVpd2Pair().
+ */
+int encodeVpdString(
+ const uint8_t *key,
+ const uint8_t *value,
+ const int pad_value_len,
+ const int max_buffer_len,
+ uint8_t *output_buf,
+ int *generated_len);
+
+
+/* Given the encoded string, this function invokes callback with extracted
+ * (key, value). The *consumed will be plused the number of bytes consumed in
+ * this function.
+ *
+ * The input_buf points to the first byte of the input buffer.
+ *
+ * The *consumed starts from 0, which is actually the next byte to be decoded.
+ * It can be non-zero to be used in multiple calls.
+ *
+ * If one entry is successfully decoded, sends it to callback and returns the
+ * result.
+ */
+int decodeVpdString(
+ const int32_t max_len,
+ const uint8_t *input_buf,
+ int32_t *consumed,
+ VpdDecodeCallback callback,
+ void *callback_arg);
+
+/***********************************************************************
+ * Container helpers
+ ***********************************************************************/
+void initContainer(struct PairContainer *container);
+
+struct StringPair *findString(struct PairContainer *container,
+ const uint8_t *key,
+ struct StringPair ***prev_next);
+
+/* If key is already existed in container, its value will be replaced.
+ * If not existed, creates new entry in container.
+ */
+void setString(struct PairContainer *container,
+ const uint8_t *key,
+ const uint8_t *value,
+ const int pad_len);
+
+/* merge all entries in src into dst. If key is duplicate, overwrite it.
+ */
+void mergeContainer(struct PairContainer *dst,
+ const struct PairContainer *src);
+
+/* subtract src from dst.
+*/
+int subtractContainer(struct PairContainer *dst,
+ const struct PairContainer *src);
+
+/* Given a container, encode its all entries into the buffer.
+ */
+int encodeContainer(const struct PairContainer *container,
+ const int max_buf_len,
+ uint8_t *buf,
+ int *generated);
+
+/* Given a VPD blob, decode its entries and push into container.
+ */
+int decodeToContainer(struct PairContainer *container,
+ const int32_t max_len,
+ const uint8_t *input_buf,
+ int32_t *consumed);
+
+/* Set filter for exporting functions.
+ * If filter is NULL, resets the filter so that everything can be exported.
+ */
+int setContainerFilter(struct PairContainer *container,
+ const uint8_t *filter);
+
+/*
+ * Remove a key.
+ * Returns VPD_OK if deleted successfully. Otherwise, VPD_FAIL.
+ */
+int deleteKey(struct PairContainer *container,
+ const uint8_t *key);
+
+/*
+ * Returns number of pairs in container.
+ */
+int lenOfContainer(const struct PairContainer *container);
+
+/*
+ * Export the container content with human-readable text.
+ *
+ * The buf points to the first byte of buffer and *generated contains the number
+ * of bytes already existed in buffer.
+ *
+ * Afterward, the *generated will be plused on exact bytes this function has
+ * generated.
+ */
+int exportContainer(const int export_type,
+ const struct PairContainer *container,
+ const int max_buf_len,
+ uint8_t *buf,
+ int *generated);
+
+void destroyContainer(struct PairContainer *container);
+
+#endif /* __LIB_VPD__ */
diff --git a/src/drivers/vpd/vpd.c b/src/drivers/vpd/vpd.c
new file mode 100644
index 0000000..e620b58
--- /dev/null
+++ b/src/drivers/vpd/vpd.c
@@ -0,0 +1,233 @@
+/*
+ * Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <console/console.h>
+#include <cbmem.h>
+#include <fmap.h>
+#include <stdlib.h>
+#include <string.h>
+#include <timestamp.h>
+
+#include "vpd.h"
+#include "lib_vpd.h"
+#include "vpd_tables.h"
+
+/* Currently we only support Google VPD 2.0, which has a fixed offset. */
+enum {
+ GOOGLE_VPD_2_0_OFFSET = 0x600,
+ CROSVPD_CBMEM_MAGIC = 0x43524f53,
+ CROSVPD_CBMEM_VERSION = 0x0001,
+};
+
+struct vpd_gets_arg {
+ const uint8_t *key;
+ const uint8_t *value;
+ int32_t key_len, value_len;
+ int matched;
+};
+
+struct vpd_cbmem {
+ uint32_t magic;
+ uint32_t version;
+ uint32_t ro_size;
+ uint32_t rw_size;
+ uint8_t blob[0];
+ /* The blob contains both RO and RW data. It starts with RO (0 ..
+ * ro_size) and then RW (ro_size .. ro_size+rw_size).
+ */
+};
+
+/* returns the size of data in a VPD 2.0 formatted fmap region, or 0 */
+static int32_t get_vpd_size(const char *fmap_name, int32_t *base)
+{
+ struct google_vpd_info info;
+ struct region_device vpd;
+ int32_t size;
+
+ if (fmap_locate_area_as_rdev(fmap_name, &vpd)) {
+ printk(BIOS_ERR, "%s: No %s FMAP section.\n", __func__,
+ fmap_name);
+ return 0;
+ }
+
+ size = region_device_sz(&vpd);
+
+ if ((size < GOOGLE_VPD_2_0_OFFSET + sizeof(info)) ||
+ rdev_chain(&vpd, &vpd, GOOGLE_VPD_2_0_OFFSET,
+ size - GOOGLE_VPD_2_0_OFFSET)) {
+ printk(BIOS_ERR, "%s: Too small (%d) for Google VPD 2.0.\n",
+ __func__, size);
+ return 0;
+ }
+
+ /* Try if we can find a google_vpd_info, otherwise read whole VPD. */
+ if (rdev_readat(&vpd, &info, *base, sizeof(info)) != sizeof(info)) {
+ printk(BIOS_ERR, "ERROR: Failed to read %s header.\n",
+ fmap_name);
+ return 0;
+ }
+
+ if (memcmp(info.header.magic, VPD_INFO_MAGIC, sizeof(info.header.magic))
+ == 0 && size >= info.size + sizeof(info)) {
+ *base += sizeof(info);
+ size = info.size;
+ } else if (info.header.tlv.type == VPD_TYPE_TERMINATOR ||
+ info.header.tlv.type == VPD_TYPE_IMPLICIT_TERMINATOR) {
+ printk(BIOS_WARNING, "WARNING: %s is uninitialized or empty.\n",
+ fmap_name);
+ size = 0;
+ } else {
+ size -= GOOGLE_VPD_2_0_OFFSET;
+ }
+
+ return size;
+}
+
+static void cbmem_add_cros_vpd(int is_recovery)
+{
+ struct region_device vpd;
+ struct vpd_cbmem *cbmem;
+ int32_t ro_vpd_base = 0, rw_vpd_base = 0;
+ int32_t ro_vpd_size, rw_vpd_size;
+
+ timestamp_add_now(TS_START_COPYVPD);
+
+ ro_vpd_size = get_vpd_size("RO_VPD", &ro_vpd_base);
+ rw_vpd_size = get_vpd_size("RW_VPD", &rw_vpd_base);
+
+ /* no VPD at all? nothing to do then */
+ if ((ro_vpd_size == 0) && (rw_vpd_size == 0))
+ return;
+
+ cbmem = cbmem_add(CBMEM_ID_VPD, sizeof(*cbmem) + ro_vpd_size +
+ rw_vpd_size);
+ if (!cbmem) {
+ printk(BIOS_ERR, "%s: Failed to allocate CBMEM (%u+%u).\n",
+ __func__, ro_vpd_size, rw_vpd_size);
+ return;
+ }
+
+ cbmem->magic = CROSVPD_CBMEM_MAGIC;
+ cbmem->version = CROSVPD_CBMEM_VERSION;
+ cbmem->ro_size = 0;
+ cbmem->rw_size = 0;
+
+ if (ro_vpd_size) {
+ if (fmap_locate_area_as_rdev("RO_VPD", &vpd)) {
+ /* shouldn't happen, but let's be extra defensive */
+ printk(BIOS_ERR, "%s: No RO_VPD FMAP section.\n",
+ __func__);
+ return;
+ }
+ rdev_chain(&vpd, &vpd, GOOGLE_VPD_2_0_OFFSET,
+ region_device_sz(&vpd) - GOOGLE_VPD_2_0_OFFSET);
+
+
+ if (rdev_readat(&vpd, cbmem->blob, ro_vpd_base, ro_vpd_size) ==
+ ro_vpd_size) {
+ cbmem->ro_size = ro_vpd_size;
+ } else {
+ printk(BIOS_ERR,
+ "%s: Reading RO_VPD FMAP section failed.\n",
+ __func__);
+ ro_vpd_size = 0;
+ }
+ timestamp_add_now(TS_END_COPYVPD_RO);
+ }
+
+ if (rw_vpd_size) {
+ if (fmap_locate_area_as_rdev("RW_VPD", &vpd)) {
+ /* shouldn't happen, but let's be extra defensive */
+ printk(BIOS_ERR, "%s: No RW_VPD FMAP section.\n",
+ __func__);
+ return;
+ }
+ rdev_chain(&vpd, &vpd, GOOGLE_VPD_2_0_OFFSET,
+ region_device_sz(&vpd) - GOOGLE_VPD_2_0_OFFSET);
+
+ if (rdev_readat(&vpd, cbmem->blob + ro_vpd_size, rw_vpd_base,
+ rw_vpd_size) == rw_vpd_size) {
+ cbmem->rw_size = rw_vpd_size;
+ } else {
+ printk(BIOS_ERR,
+ "%s: Reading RW_VPD FMAP section failed.\n",
+ __func__);
+ }
+ timestamp_add_now(TS_END_COPYVPD_RW);
+ }
+}
+
+static int vpd_gets_callback(const uint8_t *key, int32_t key_len,
+ const uint8_t *value, int32_t value_len,
+ void *arg)
+{
+ struct vpd_gets_arg *result = (struct vpd_gets_arg *)arg;
+ if (key_len != result->key_len ||
+ memcmp(key, result->key, key_len) != 0)
+ /* Returns VPD_OK to continue parsing. */
+ return VPD_OK;
+
+ result->matched = 1;
+ result->value = value;
+ result->value_len = value_len;
+ /* Returns VPD_FAIL to stop parsing. */
+ return VPD_FAIL;
+}
+
+const void *vpd_find(const char *key, int *size, enum vpd_region region)
+{
+ struct vpd_gets_arg arg = {0};
+ int consumed = 0;
+ const struct vpd_cbmem *vpd;
+
+ vpd = cbmem_find(CBMEM_ID_VPD);
+ if (!vpd || !vpd->ro_size)
+ return NULL;
+
+ arg.key = (const uint8_t *)key;
+ arg.key_len = strlen(key);
+
+ if (region == VPD_ANY || region == VPD_RO)
+ while (VPD_OK == decodeVpdString(vpd->ro_size, vpd->blob,
+ &consumed, vpd_gets_callback, &arg)) {
+ /* Iterate until found or no more entries. */
+ }
+
+ if (!arg.matched && region != VPD_RO)
+ while (VPD_OK == decodeVpdString(vpd->rw_size,
+ vpd->blob + vpd->ro_size, &consumed,
+ vpd_gets_callback, &arg)) {
+ /* Iterate until found or no more entries. */
+ }
+
+ if (!arg.matched)
+ return NULL;
+
+ *size = arg.value_len;
+ return arg.value;
+}
+
+char *vpd_gets(const char *key, char *buffer, int size, enum vpd_region region)
+{
+ const void *string_address;
+ int string_size;
+
+ string_address = vpd_find(key, &string_size, region);
+
+ if (!string_address)
+ return NULL;
+
+ if (size > (string_size + 1)) {
+ memcpy(buffer, string_address, string_size);
+ buffer[string_size] = '\0';
+ } else {
+ memcpy(buffer, string_address, size - 1);
+ buffer[size - 1] = '\0';
+ }
+ return buffer;
+}
+
+RAMSTAGE_CBMEM_INIT_HOOK(cbmem_add_cros_vpd)
diff --git a/src/drivers/vpd/vpd.h b/src/drivers/vpd/vpd.h
new file mode 100644
index 0000000..1877cc6
--- /dev/null
+++ b/src/drivers/vpd/vpd.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef __VPD_H__
+#define __VPD_H__
+
+enum vpd_region {
+ VPD_ANY = 0,
+ VPD_RO = 1,
+ VPD_RW = 2
+};
+/*
+ * Reads VPD string value by key.
+ *
+ * Reads in at most one less than size characters from VPD and stores them
+ * into buffer. A terminating null byte ('\0') is stored after the last
+ * character in the buffer.
+ *
+ * Returns NULL if key is not found, otherwise buffer.
+ */
+char *vpd_gets(const char *key, char *buffer, int size, enum vpd_region region);
+
+/*
+ * Find VPD value by key.
+ *
+ * Searches for a VPD entry in the VPD cache. If found, places the size of the
+ * entry into '*size' and returns the pointer to the entry data.
+ *
+ * This function presumes that VPD is cached in DRAM (which is the case in the
+ * current implementation) and as such returns the pointer into the cache. The
+ * user is not supposed to modify the data, and does not have to free the
+ * memory.
+ *
+ * Returns NULL if key is not found.
+ */
+
+const void *vpd_find(const char *key, int *size, enum vpd_region region);
+
+#endif /* __CROS_VPD_H__ */
diff --git a/src/drivers/vpd/vpd_tables.h b/src/drivers/vpd/vpd_tables.h
new file mode 100644
index 0000000..822ed08
--- /dev/null
+++ b/src/drivers/vpd/vpd_tables.h
@@ -0,0 +1,115 @@
+/*
+ * Copyright (c) 2014 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
+ * Ported from mosys project (http://code.google.com/p/mosys/).
+ */
+
+#ifndef __LIB_VPD_TABLES_H__
+#define __LIB_VPD_TABLES_H__
+
+#include <compiler.h>
+#include <inttypes.h>
+
+#define VPD_ENTRY_MAGIC "_SM_"
+#define VPD_INFO_MAGIC \
+ "\xfe" /* type: VPD header */ \
+ "\x09" /* key length, 9 = 1 + 8 */ \
+ "\x01" /* info version, 1 */ \
+ "gVpdInfo" /* signature, 8 bytes */ \
+ "\x04" /* value length */
+
+/* Google specific VPD info */
+struct google_vpd_info {
+ union {
+ struct {
+ uint8_t type;
+ uint8_t key_len;
+ uint8_t info_ver;
+ uint8_t signature[8];
+ uint8_t value_len;
+ } tlv;
+ uint8_t magic[12];
+ } header;
+ uint32_t size;
+} __packed;
+
+/* Entry */
+struct vpd_entry {
+ uint8_t anchor_string[4];
+ uint8_t entry_cksum;
+ uint8_t entry_length;
+ uint8_t major_ver;
+ uint8_t minor_ver;
+ uint16_t max_size;
+ uint8_t entry_rev;
+ uint8_t format_area[5];
+ uint8_t inter_anchor_string[5];
+ uint8_t inter_anchor_cksum;
+ uint16_t table_length;
+ uint32_t table_address;
+ uint16_t table_entry_count;
+ uint8_t bcd_revision;
+} __packed;
+
+/* Header */
+struct vpd_header {
+ uint8_t type;
+ uint8_t length;
+ uint16_t handle;
+} __packed;
+
+/* Type 0 - firmware information */
+struct vpd_table_firmware {
+ uint8_t vendor;
+ uint8_t version;
+ uint16_t start_address;
+ uint8_t release_date;
+ uint8_t rom_size_64k_blocks;
+ uint32_t characteristics;
+ uint8_t extension[2]; /* v2.4+ */
+ uint8_t major_ver; /* v2.4+ */
+ uint8_t minor_ver; /* v2.4+ */
+ uint8_t ec_major_ver; /* v2.4+ */
+ uint8_t ec_minor_ver; /* v2.4+ */
+} __packed;
+
+/* Type 1 - system information */
+struct vpd_table_system {
+ uint8_t manufacturer;
+ uint8_t name;
+ uint8_t version;
+ uint8_t serial_number;
+ uint8_t uuid[16];
+ uint8_t wakeup_type;
+ uint8_t sku_number; /* v2.4+ */
+ uint8_t family; /* v2.4+ */
+} __packed;
+
+/* Type 127 - end of table */
+struct vpd_table_eot {
+ struct vpd_header header;
+} __packed;
+
+/* Type 241 - binary blob pointer */
+struct vpd_table_binary_blob_pointer {
+ uint8_t struct_major_version;
+ uint8_t struct_minor_version;
+ uint8_t vendor;
+ uint8_t description;
+ uint8_t major_version;
+ uint8_t minor_version;
+ uint8_t variant;
+ uint8_t reserved[5];
+ uint8_t uuid[16];
+ uint32_t offset;
+ uint32_t size;
+} __packed;
+
+/* The length and number of strings defined here is not a limitation of VPD.
+ * These numbers were deemed good enough during development. */
+#define VPD_MAX_STRINGS 10
+#define VPD_MAX_STRING_LENGTH 64
+
+#endif /* __LIB_VPD_TABLES_H__ */
--
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Gerrit-Project: coreboot
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: Id9263bd39bf25d024e93daa57053fefcb1adc53a
Gerrit-Change-Number: 25046
Gerrit-PatchSet: 1
Gerrit-Owner: Patrick Rudolph <patrick.rudolph at 9elements.com>
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