Merge https://gitlab.denx.de/u-boot/custodians/u-boot-x86WIP/06Feb2021

- introduces some standard sysinfo options as a source, e.g. to read
  strapping pins to determine the board revision
- allows the U-Boot version number to be included
- allows the version number to be provided programmatically, e.g. to
  support the build system adding information after U-Boot is built

8 files changed, 328 insertions, 76 deletions

diff --git a/Makefile b/Makefile
index 23dd11f723..ebbedb1fb1 100644
--- a/Makefile
+++ b/Makefile
@@ -1853,9 +1853,13 @@ prepare: prepare0
 # Generate some files
 # ---------------------------------------------------------------------------
 
+# Use sed to remove leading zeros from PATCHLEVEL to avoid using octal numbers
 define filechk_version.h
 	(echo \#define PLAIN_VERSION \"$(UBOOTRELEASE)\"; \
 	echo \#define U_BOOT_VERSION \"U-Boot \" PLAIN_VERSION; \
+	echo \#define U_BOOT_VERSION_NUM $(VERSION); \
+	echo \#define U_BOOT_VERSION_NUM_PATCH $$(echo $(PATCHLEVEL) | \
+		sed -e "s/^0*//"); \
 	echo \#define CC_VERSION_STRING \"$$(LC_ALL=C $(CC) --version | head -n 1)\"; \
 	echo \#define LD_VERSION_STRING \"$$(LC_ALL=C $(LD) --version | head -n 1)\"; )
 endef
diff --git a/board/google/chromebook_coral/coral.c b/board/google/chromebook_coral/coral.c
index 34b2c2ac5d..f9fb3f163f 100644
--- a/board/google/chromebook_coral/coral.c
+++ b/board/google/chromebook_coral/coral.c
@@ -8,6 +8,7 @@
 #include <command.h>
 #include <dm.h>
 #include <log.h>
+#include <sysinfo.h>
 #include <acpi/acpigen.h>
 #include <asm-generic/gpio.h>
 #include <asm/acpi_nhlt.h>
@@ -143,6 +144,9 @@ struct acpi_ops coral_acpi_ops = {
 	.inject_dsdt	= chromeos_acpi_gpio_generate,
 };
 
+struct sysinfo_ops coral_sysinfo_ops = {
+};
+
 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
 static const struct udevice_id coral_ids[] = {
 	{ .compatible = "google,coral" },
@@ -154,5 +158,6 @@ U_BOOT_DRIVER(coral_drv) = {
 	.name		= "coral",
 	.id		= UCLASS_SYSINFO,
 	.of_match	= of_match_ptr(coral_ids),
+	.ops		= &coral_sysinfo_ops,
 	ACPI_OPS_PTR(&coral_acpi_ops)
 };
diff --git a/doc/develop/index.rst b/doc/develop/index.rst
index beaa64d8d9..ac57fdb8f3 100644
--- a/doc/develop/index.rst
+++ b/doc/develop/index.rst
@@ -13,6 +13,7 @@ Implementation
    global_data
    logging
    menus
+   version
 
 Debugging
 ---------
diff --git a/doc/develop/version.rst b/doc/develop/version.rst
new file mode 100644
index 0000000000..a7797db41b
--- /dev/null
+++ b/doc/develop/version.rst
@@ -0,0 +1,101 @@
+.. SPDX-License-Identifier: GPL-2.0+
+.. Copyright (c) 2013 The Chromium OS Authors.
+
+Version information
+===================
+
+U-Boot releases are named by year and patch level, for example 2020.10 means the
+release that came out in October 2020. Release candidates are tagged every few
+weeks as the project heads to the next release. So 2020.10-rc1 was the first
+release candidate (RC), tagged soon after 2020.07 was released.
+
+See https://www.denx.de/wiki/view/U-Boot/ReleaseCycle for full details.
+
+Within the build system, various Makefile variables are created, making use of
+VERSION, PATCHLEVEL and EXTRAVERSION defined at the top of 'Makefile'. There is
+also SUBLEVEL available for downstream use. See also CONFIG_IDENT_STRING.
+
+Some variables end up in a generated header file at
+include/generated/version_autogenerated.h and can be accessed from C source by
+including <version.h>
+
+The following are available:
+
+   UBOOTRELEASE (Makefile)
+      Full release version as a string. If this is not a tagged release, it also
+      includes the number of commits since the last tag as well as the the git
+      hash.  If there are uncommitted changes a '-dirty' suffix is added too.
+
+      This is written by scripts/setlocalversion (maintained by Linux) to
+      include/config/uboot.release and ends up in the UBOOTRELEASE Makefile
+      variable.
+
+      Examples::
+
+         2020.10-rc3
+         2021.01-rc5-00248-g60dd854f3ba-dirty
+
+   PLAIN_VERSION (string #define)
+      This is UBOOTRELEASE but available in C source.
+
+      Examples::
+
+         2020.10
+         2021.01-rc5-00248-g60dd854f3ba-dirty
+
+   UBOOTVERSION (Makefile)
+      This holds just the first three components of UBOOTRELEASE (i.e. not the
+      git hash, etc.)
+
+      Examples::
+
+         2020.10
+         2021.01-rc5
+
+   U_BOOT_VERSION (string #define)
+      "U-Boot " followed by UBOOTRELEASE, for example::
+
+         U-Boot 2020.10
+         U-Boot 2021.01-rc5
+
+      This is used as part of the banner string when U-Boot starts.
+
+   U_BOOT_VERSION_STRING (string #define)
+      U_BOOT_VERSION followed by build-time information
+      and CONFIG_IDENT_STRING.
+
+      Examples::
+
+         U-Boot 2020.10 (Jan 06 2021 - 08:50:36 -0700)
+         U-Boot 2021.01-rc5-00248-g60dd854f3ba-dirty (Jan 06 2021 - 08:50:36 -0700) for spring
+
+   U_BOOT_VERSION_NUM (integer #define)
+      Release year, e.g. 2021 for release 2021.01. Note
+      this is an integer, not a string.
+
+   U_BOOT_VERSION_NUM_PATCH (integer #define)
+      Patch number, e.g. 1 for release 2020.01. Note
+      this is an integer, not a string.
+
+Build date/time is also included. See the generated file
+include/generated/timestamp_autogenerated.h for the available
+fields. For example::
+
+   #define U_BOOT_DATE "Jan 06 2021"     (US format only)
+   #define U_BOOT_TIME "08:50:36"        (24-hour clock)
+   #define U_BOOT_TZ "-0700"             (Time zone in hours)
+   #define U_BOOT_DMI_DATE "01/06/2021"  (US format only)
+   #define U_BOOT_BUILD_DATE 0x20210106  (hex yyyymmdd format)
+   #define U_BOOT_EPOCH 1609948236
+
+The Epoch is the number of seconds since midnight on 1/1/70. You can convert
+this to a time with::
+
+   $ date -u -d @1609948236
+   Wed 06 Jan 2021 03:50:36 PM UTC
+   $ date -d 'Wed 06 Jan 2021 03:50:36 PM UTC' +%s
+   1609948236
+
+Every time you build U-Boot this will update based on the time
+on your build machine. See 'Reproducible builds' if you want to
+avoid that.
diff --git a/include/asm-generic/global_data.h b/include/asm-generic/global_data.h
index 998beb0176..b6a9991fc9 100644
--- a/include/asm-generic/global_data.h
+++ b/include/asm-generic/global_data.h
@@ -447,6 +447,12 @@ struct global_data {
 	 */
 	struct acpi_ctx *acpi_ctx;
 #endif
+#if CONFIG_IS_ENABLED(GENERATE_SMBIOS_TABLE)
+	/**
+	 * @smbios_version: Points to SMBIOS type 0 version
+	 */
+	char *smbios_version;
+#endif
 };
 
 /**
diff --git a/include/smbios.h b/include/smbios.h
index 1846607c3c..ecc4fd1de3 100644
--- a/include/smbios.h
+++ b/include/smbios.h
@@ -183,14 +183,14 @@ struct __packed smbios_type32 {
 	u16 handle;
 	u8 reserved[6];
 	u8 boot_status;
-	u8 eos[SMBIOS_STRUCT_EOS_BYTES];
+	char eos[SMBIOS_STRUCT_EOS_BYTES];
 };
 
 struct __packed smbios_type127 {
 	u8 type;
 	u8 length;
 	u16 handle;
-	u8 eos[SMBIOS_STRUCT_EOS_BYTES];
+	char eos[SMBIOS_STRUCT_EOS_BYTES];
 };
 
 struct __packed smbios_header {
@@ -220,16 +220,6 @@ static inline void fill_smbios_header(void *table, int type,
 }
 
 /**
- * Function prototype to write a specific type of SMBIOS structure
- *
- * @addr:	start address to write the structure
- * @handle:	the structure's handle, a unique 16-bit number
- * @node:	node containing the information to write (ofnode_null() if none)
- * @return:	size of the structure
- */
-typedef int (*smbios_write_type)(ulong *addr, int handle, ofnode node);
-
-/**
  * write_smbios_table() - Write SMBIOS table
  *
  * This writes SMBIOS table at a given address.
@@ -267,4 +257,16 @@ const struct smbios_header *smbios_header(const struct smbios_entry *entry, int
  */
 const char *smbios_string(const struct smbios_header *header, int index);
 
+/**
+ * smbios_update_version() - Update the version string
+ *
+ * This can be called after the SMBIOS tables are written (e.g. after the U-Boot
+ * main loop has started) to update the BIOS version string (SMBIOS table 0).
+ *
+ * @version: New version string to use
+ * @return 0 if OK, -ENOENT if no version string was previously written,
+ *	-ENOSPC if the new string is too large to fit
+ */
+int smbios_update_version(const char *version);
+
 #endif /* _SMBIOS_H_ */
diff --git a/include/sysinfo.h b/include/sysinfo.h
index c045d316b0..743f355465 100644
--- a/include/sysinfo.h
+++ b/include/sysinfo.h
@@ -31,7 +31,17 @@
  * to read the serial number.
  */
 
-#if CONFIG_IS_ENABLED(SYSINFO)
+/** enum sysinfo_id - Standard IDs defined by U-Boot */
+enum sysinfo_id {
+	SYSINFO_ID_NONE,
+
+	SYSINFO_ID_SMBIOS_SYSTEM_VERSION,
+	SYSINFO_ID_SMBIOS_BASEBOARD_VERSION,
+
+	/* First value available for downstream/board used */
+	SYSINFO_ID_USER = 0x1000,
+};
+
 struct sysinfo_ops {
 	/**
 	 * detect() - Run the hardware info detection procedure for this
@@ -102,6 +112,7 @@ struct sysinfo_ops {
 
 #define sysinfo_get_ops(dev)	((struct sysinfo_ops *)(dev)->driver->ops)
 
+#if CONFIG_IS_ENABLED(SYSINFO)
 /**
  * sysinfo_detect() - Run the hardware info detection procedure for this device.
  *
diff --git a/lib/smbios.c b/lib/smbios.c
index 1e10fa8420..7d463c84a9 100644
--- a/lib/smbios.c
+++ b/lib/smbios.c
@@ -10,6 +10,7 @@
 #include <env.h>
 #include <mapmem.h>
 #include <smbios.h>
+#include <sysinfo.h>
 #include <tables_csum.h>
 #include <version.h>
 #ifdef CONFIG_CPU
@@ -17,6 +18,44 @@
 #include <dm/uclass-internal.h>
 #endif
 
+DECLARE_GLOBAL_DATA_PTR;
+
+enum {
+	SMBIOS_STR_MAX	= 64,	/* Maximum length allowed for a string */
+};
+
+/**
+ * struct smbios_ctx - context for writing SMBIOS tables
+ *
+ * @node:	node containing the information to write (ofnode_null() if none)
+ * @dev:	sysinfo device to use (NULL if none)
+ * @eos:	end-of-string pointer for the table being processed. This is set
+ *		up when we start processing a table
+ * @next_ptr:	pointer to the start of the next string to be added. When the
+ *		table is nopt empty, this points to the byte after the \0 of the
+ *		previous string.
+ * @last_str:	points to the last string that was written to the table, or NULL
+ *		if none
+ */
+struct smbios_ctx {
+	ofnode node;
+	struct udevice *dev;
+	char *eos;
+	char *next_ptr;
+	char *last_str;
+};
+
+/**
+ * Function prototype to write a specific type of SMBIOS structure
+ *
+ * @addr:	start address to write the structure
+ * @handle:	the structure's handle, a unique 16-bit number
+ * @ctx:	context for writing the tables
+ * @return:	size of the structure
+ */
+typedef int (*smbios_write_type)(ulong *addr, int handle,
+				 struct smbios_ctx *ctx);
+
 /**
  * struct smbios_write_method - Information about a table-writing function
  *
@@ -35,29 +74,34 @@ struct smbios_write_method {
  * This adds a string to the string area which is appended directly after
  * the formatted portion of an SMBIOS structure.
  *
- * @start:	string area start address
+ * @ctx:	SMBIOS context
  * @str:	string to add
  * @return:	string number in the string area (1 or more)
  */
-static int smbios_add_string(char *start, const char *str)
+static int smbios_add_string(struct smbios_ctx *ctx, const char *str)
 {
 	int i = 1;
-	char *p = start;
+	char *p = ctx->eos;
+
 	if (!*str)
 		str = "Unknown";
 
 	for (;;) {
 		if (!*p) {
+			ctx->last_str = p;
 			strcpy(p, str);
 			p += strlen(str);
 			*p++ = '\0';
+			ctx->next_ptr = p;
 			*p++ = '\0';
 
 			return i;
 		}
 
-		if (!strcmp(p, str))
+		if (!strcmp(p, str)) {
+			ctx->last_str = p;
 			return i;
+		}
 
 		p += strlen(p) + 1;
 		i++;
@@ -65,50 +109,98 @@ static int smbios_add_string(char *start, const char *str)
 }
 
 /**
- * smbios_add_prop() - Add a property from the device tree
+ * smbios_add_prop_si() - Add a property from the devicetree or sysinfo
  *
- * @start:	string area start address
- * @node:	node containing the information to write (ofnode_null() if none)
+ * Sysinfo is used if available, with a fallback to devicetree
+ *
+ * @ctx:	context for writing the tables
  * @prop:	property to write
  * @return 0 if not found, else SMBIOS string number (1 or more)
  */
-static int smbios_add_prop(char *start, ofnode node, const char *prop)
+static int smbios_add_prop_si(struct smbios_ctx *ctx, const char *prop,
+			      int sysinfo_id)
 {
+	if (sysinfo_id && ctx->dev) {
+		char val[SMBIOS_STR_MAX];
+		int ret;
 
+		ret = sysinfo_get_str(ctx->dev, sysinfo_id, sizeof(val), val);
+		if (!ret)
+			return smbios_add_string(ctx, val);
+	}
 	if (IS_ENABLED(CONFIG_OF_CONTROL)) {
 		const char *str;
 
-		str = ofnode_read_string(node, prop);
+		str = ofnode_read_string(ctx->node, prop);
 		if (str)
-			return smbios_add_string(start, str);
+			return smbios_add_string(ctx, str);
 	}
 
 	return 0;
 }
 
 /**
+ * smbios_add_prop() - Add a property from the devicetree
+ *
+ * @prop:	property to write
+ * @return 0 if not found, else SMBIOS string number (1 or more)
+ */
+static int smbios_add_prop(struct smbios_ctx *ctx, const char *prop)
+{
+	return smbios_add_prop_si(ctx, prop, SYSINFO_ID_NONE);
+}
+
+static void smbios_set_eos(struct smbios_ctx *ctx, char *eos)
+{
+	ctx->eos = eos;
+	ctx->next_ptr = eos;
+	ctx->last_str = NULL;
+}
+
+int smbios_update_version(const char *version)
+{
+	char *ptr = gd->smbios_version;
+	uint old_len, len;
+
+	if (!ptr)
+		return log_ret(-ENOENT);
+
+	/*
+	 * This string is supposed to have at least enough bytes and is
+	 * padded with spaces. Update it, taking care not to move the
+	 * \0 terminator, so that other strings in the string table
+	 * are not disturbed. See smbios_add_string()
+	 */
+	old_len = strnlen(ptr, SMBIOS_STR_MAX);
+	len = strnlen(version, SMBIOS_STR_MAX);
+	if (len > old_len)
+		return log_ret(-ENOSPC);
+
+	log_debug("Replacing SMBIOS type 0 version string '%s'\n", ptr);
+	memcpy(ptr, version, len);
+#ifdef LOG_DEBUG
+	print_buffer((ulong)ptr, ptr, 1, old_len + 1, 0);
+#endif
+
+	return 0;
+}
+
+/**
  * smbios_string_table_len() - compute the string area size
  *
  * This computes the size of the string area including the string terminator.
  *
- * @start:	string area start address
+ * @ctx:	SMBIOS context
  * @return:	string area size
  */
-static int smbios_string_table_len(char *start)
+static int smbios_string_table_len(const struct smbios_ctx *ctx)
 {
-	char *p = start;
-	int i, len = 0;
-
-	while (*p) {
-		i = strlen(p) + 1;
-		p += i;
-		len += i;
-	}
-
-	return len + 1;
+	/* Allow for the final \0 after all strings */
+	return (ctx->next_ptr + 1) - ctx->eos;
 }
 
-static int smbios_write_type0(ulong *current, int handle, ofnode node)
+static int smbios_write_type0(ulong *current, int handle,
+			      struct smbios_ctx *ctx)
 {
 	struct smbios_type0 *t;
 	int len = sizeof(struct smbios_type0);
@@ -116,9 +208,21 @@ static int smbios_write_type0(ulong *current, int handle, ofnode node)
 	t = map_sysmem(*current, len);
 	memset(t, 0, sizeof(struct smbios_type0));
 	fill_smbios_header(t, SMBIOS_BIOS_INFORMATION, len, handle);
-	t->vendor = smbios_add_string(t->eos, "U-Boot");
-	t->bios_ver = smbios_add_string(t->eos, PLAIN_VERSION);
-	t->bios_release_date = smbios_add_string(t->eos, U_BOOT_DMI_DATE);
+	smbios_set_eos(ctx, t->eos);
+	t->vendor = smbios_add_string(ctx, "U-Boot");
+
+	t->bios_ver = smbios_add_prop(ctx, "version");
+	if (!t->bios_ver)
+		t->bios_ver = smbios_add_string(ctx, PLAIN_VERSION);
+	if (t->bios_ver)
+		gd->smbios_version = ctx->last_str;
+	log_debug("smbios_version = %p: '%s'\n", gd->smbios_version,
+		  gd->smbios_version);
+#ifdef LOG_DEBUG
+	print_buffer((ulong)gd->smbios_version, gd->smbios_version,
+		     1, strlen(gd->smbios_version) + 1, 0);
+#endif
+	t->bios_release_date = smbios_add_string(ctx, U_BOOT_DMI_DATE);
 #ifdef CONFIG_ROM_SIZE
 	t->bios_rom_size = (CONFIG_ROM_SIZE / 65536) - 1;
 #endif
@@ -133,19 +237,21 @@ static int smbios_write_type0(ulong *current, int handle, ofnode node)
 #endif
 	t->bios_characteristics_ext2 = BIOS_CHARACTERISTICS_EXT2_TARGET;
 
-	t->bios_major_release = 0xff;
-	t->bios_minor_release = 0xff;
+	/* bios_major_release has only one byte, so drop century */
+	t->bios_major_release = U_BOOT_VERSION_NUM % 100;
+	t->bios_minor_release = U_BOOT_VERSION_NUM_PATCH;
 	t->ec_major_release = 0xff;
 	t->ec_minor_release = 0xff;
 
-	len = t->length + smbios_string_table_len(t->eos);
+	len = t->length + smbios_string_table_len(ctx);
 	*current += len;
 	unmap_sysmem(t);
 
 	return len;
 }
 
-static int smbios_write_type1(ulong *current, int handle, ofnode node)
+static int smbios_write_type1(ulong *current, int handle,
+			      struct smbios_ctx *ctx)
 {
 	struct smbios_type1 *t;
 	int len = sizeof(struct smbios_type1);
@@ -154,26 +260,29 @@ static int smbios_write_type1(ulong *current, int handle, ofnode node)
 	t = map_sysmem(*current, len);
 	memset(t, 0, sizeof(struct smbios_type1));
 	fill_smbios_header(t, SMBIOS_SYSTEM_INFORMATION, len, handle);
-	t->manufacturer = smbios_add_prop(t->eos, node, "manufacturer");
-	t->product_name = smbios_add_prop(t->eos, node, "product");
-	t->version = smbios_add_prop(t->eos, node, "version");
+	smbios_set_eos(ctx, t->eos);
+	t->manufacturer = smbios_add_prop(ctx, "manufacturer");
+	t->product_name = smbios_add_prop(ctx, "product");
+	t->version = smbios_add_prop_si(ctx, "version",
+					SYSINFO_ID_SMBIOS_SYSTEM_VERSION);
 	if (serial_str) {
-		t->serial_number = smbios_add_string(t->eos, serial_str);
+		t->serial_number = smbios_add_string(ctx, serial_str);
 		strncpy((char *)t->uuid, serial_str, sizeof(t->uuid));
 	} else {
-		t->serial_number = smbios_add_prop(t->eos, node, "serial");
+		t->serial_number = smbios_add_prop(ctx, "serial");
 	}
-	t->sku_number = smbios_add_prop(t->eos, node, "sku");
-	t->family = smbios_add_prop(t->eos, node, "family");
+	t->sku_number = smbios_add_prop(ctx, "sku");
+	t->family = smbios_add_prop(ctx, "family");
 
-	len = t->length + smbios_string_table_len(t->eos);
+	len = t->length + smbios_string_table_len(ctx);
 	*current += len;
 	unmap_sysmem(t);
 
 	return len;
 }
 
-static int smbios_write_type2(ulong *current, int handle, ofnode node)
+static int smbios_write_type2(ulong *current, int handle,
+			      struct smbios_ctx *ctx)
 {
 	struct smbios_type2 *t;
 	int len = sizeof(struct smbios_type2);
@@ -181,20 +290,24 @@ static int smbios_write_type2(ulong *current, int handle, ofnode node)
 	t = map_sysmem(*current, len);
 	memset(t, 0, sizeof(struct smbios_type2));
 	fill_smbios_header(t, SMBIOS_BOARD_INFORMATION, len, handle);
-	t->manufacturer = smbios_add_prop(t->eos, node, "manufacturer");
-	t->product_name = smbios_add_prop(t->eos, node, "product");
-	t->asset_tag_number = smbios_add_prop(t->eos, node, "asset-tag");
+	smbios_set_eos(ctx, t->eos);
+	t->manufacturer = smbios_add_prop(ctx, "manufacturer");
+	t->product_name = smbios_add_prop(ctx, "product");
+	t->version = smbios_add_prop_si(ctx, "version",
+					SYSINFO_ID_SMBIOS_BASEBOARD_VERSION);
+	t->asset_tag_number = smbios_add_prop(ctx, "asset-tag");
 	t->feature_flags = SMBIOS_BOARD_FEATURE_HOSTING;
 	t->board_type = SMBIOS_BOARD_MOTHERBOARD;
 
-	len = t->length + smbios_string_table_len(t->eos);
+	len = t->length + smbios_string_table_len(ctx);
 	*current += len;
 	unmap_sysmem(t);
 
 	return len;
 }
 
-static int smbios_write_type3(ulong *current, int handle, ofnode node)
+static int smbios_write_type3(ulong *current, int handle,
+			      struct smbios_ctx *ctx)
 {
 	struct smbios_type3 *t;
 	int len = sizeof(struct smbios_type3);
@@ -202,21 +315,23 @@ static int smbios_write_type3(ulong *current, int handle, ofnode node)
 	t = map_sysmem(*current, len);
 	memset(t, 0, sizeof(struct smbios_type3));
 	fill_smbios_header(t, SMBIOS_SYSTEM_ENCLOSURE, len, handle);
-	t->manufacturer = smbios_add_prop(t->eos, node, "manufacturer");
+	smbios_set_eos(ctx, t->eos);
+	t->manufacturer = smbios_add_prop(ctx, "manufacturer");
 	t->chassis_type = SMBIOS_ENCLOSURE_DESKTOP;
 	t->bootup_state = SMBIOS_STATE_SAFE;
 	t->power_supply_state = SMBIOS_STATE_SAFE;
 	t->thermal_state = SMBIOS_STATE_SAFE;
 	t->security_status = SMBIOS_SECURITY_NONE;
 
-	len = t->length + smbios_string_table_len(t->eos);
+	len = t->length + smbios_string_table_len(ctx);
 	*current += len;
 	unmap_sysmem(t);
 
 	return len;
 }
 
-static void smbios_write_type4_dm(struct smbios_type4 *t, ofnode node)
+static void smbios_write_type4_dm(struct smbios_type4 *t,
+				  struct smbios_ctx *ctx)
 {
 	u16 processor_family = SMBIOS_PROCESSOR_FAMILY_UNKNOWN;
 	const char *vendor = "Unknown";
@@ -244,11 +359,12 @@ static void smbios_write_type4_dm(struct smbios_type4 *t, ofnode node)
 #endif
 
 	t->processor_family = processor_family;
-	t->processor_manufacturer = smbios_add_string(t->eos, vendor);
-	t->processor_version = smbios_add_string(t->eos, name);
+	t->processor_manufacturer = smbios_add_string(ctx, vendor);
+	t->processor_version = smbios_add_string(ctx, name);
 }
 
-static int smbios_write_type4(ulong *current, int handle, ofnode node)
+static int smbios_write_type4(ulong *current, int handle,
+			      struct smbios_ctx *ctx)
 {
 	struct smbios_type4 *t;
 	int len = sizeof(struct smbios_type4);
@@ -256,8 +372,9 @@ static int smbios_write_type4(ulong *current, int handle, ofnode node)
 	t = map_sysmem(*current, len);
 	memset(t, 0, sizeof(struct smbios_type4));
 	fill_smbios_header(t, SMBIOS_PROCESSOR_INFORMATION, len, handle);
+	smbios_set_eos(ctx, t->eos);
 	t->processor_type = SMBIOS_PROCESSOR_TYPE_CENTRAL;
-	smbios_write_type4_dm(t, node);
+	smbios_write_type4_dm(t, ctx);
 	t->status = SMBIOS_PROCESSOR_STATUS_ENABLED;
 	t->processor_upgrade = SMBIOS_PROCESSOR_UPGRADE_NONE;
 	t->l1_cache_handle = 0xffff;
@@ -265,14 +382,15 @@ static int smbios_write_type4(ulong *current, int handle, ofnode node)
 	t->l3_cache_handle = 0xffff;
 	t->processor_family2 = t->processor_family;
 
-	len = t->length + smbios_string_table_len(t->eos);
+	len = t->length + smbios_string_table_len(ctx);
 	*current += len;
 	unmap_sysmem(t);
 
 	return len;
 }
 
-static int smbios_write_type32(ulong *current, int handle, ofnode node)
+static int smbios_write_type32(ulong *current, int handle,
+			       struct smbios_ctx *ctx)
 {
 	struct smbios_type32 *t;
 	int len = sizeof(struct smbios_type32);
@@ -280,6 +398,7 @@ static int smbios_write_type32(ulong *current, int handle, ofnode node)
 	t = map_sysmem(*current, len);
 	memset(t, 0, sizeof(struct smbios_type32));
 	fill_smbios_header(t, SMBIOS_SYSTEM_BOOT_INFORMATION, len, handle);
+	smbios_set_eos(ctx, t->eos);
 
 	*current += len;
 	unmap_sysmem(t);
@@ -287,7 +406,8 @@ static int smbios_write_type32(ulong *current, int handle, ofnode node)
 	return len;
 }
 
-static int smbios_write_type127(ulong *current, int handle, ofnode node)
+static int smbios_write_type127(ulong *current, int handle,
+				struct smbios_ctx *ctx)
 {
 	struct smbios_type127 *t;
 	int len = sizeof(struct smbios_type127);
@@ -303,7 +423,7 @@ static int smbios_write_type127(ulong *current, int handle, ofnode node)
 }
 
 static struct smbios_write_method smbios_write_funcs[] = {
-	{ smbios_write_type0, },
+	{ smbios_write_type0, "bios", },
 	{ smbios_write_type1, "system", },
 	{ smbios_write_type2, "baseboard", },
 	{ smbios_write_type3, "chassis", },
@@ -316,7 +436,7 @@ ulong write_smbios_table(ulong addr)
 {
 	ofnode parent_node = ofnode_null();
 	struct smbios_entry *se;
-	struct udevice *dev;
+	struct smbios_ctx ctx;
 	ulong table_addr;
 	ulong tables;
 	int len = 0;
@@ -326,10 +446,13 @@ ulong write_smbios_table(ulong addr)
 	int isize;
 	int i;
 
+	ctx.node = ofnode_null();
 	if (IS_ENABLED(CONFIG_OF_CONTROL)) {
-		uclass_first_device(UCLASS_SYSINFO, &dev);
-		if (dev)
-			parent_node = dev_read_subnode(dev, "smbios");
+		uclass_first_device(UCLASS_SYSINFO, &ctx.dev);
+		if (ctx.dev)
+			parent_node = dev_read_subnode(ctx.dev, "smbios");
+	} else {
+		ctx.dev = NULL;
 	}
 
 	/* 16 byte align the table address */
@@ -345,14 +468,13 @@ ulong write_smbios_table(ulong addr)
 	/* populate minimum required tables */
 	for (i = 0; i < ARRAY_SIZE(smbios_write_funcs); i++) {
 		const struct smbios_write_method *method;
-		ofnode node = ofnode_null();
 		int tmp;
 
 		method = &smbios_write_funcs[i];
 		if (IS_ENABLED(CONFIG_OF_CONTROL) && method->subnode_name)
-			node = ofnode_find_subnode(parent_node,
-						   method->subnode_name);
-		tmp = method->write((ulong *)&addr, handle++, node);
+			ctx.node = ofnode_find_subnode(parent_node,
+						       method->subnode_name);
+		tmp = method->write((ulong *)&addr, handle++, &ctx);
 
 		max_struct_size = max(max_struct_size, tmp);
 		len += tmp;