x86: Add SMBIOS table support

System Management BIOS (SMBIOS) is a specification for how motherboard and system vendors present management information about their products in a standard format by extending the BIOS interface on Intel architecture systems. As of today the latest spec is 3.0 and can be downloaded from DMTF website. This commit adds a simple and minimum required implementation. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Acked-by: Simon Glass <sjg@chromium.org>

x86: Add SMBIOS table support
System Management BIOS (SMBIOS) is a specification for how motherboard and system vendors present management information about their products in a standard format by extending the BIOS interface on Intel architecture systems. As of today the latest spec is 3.0 and can be downloaded from DMTF website. This commit adds a simple and minimum required implementation. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Acked-by: Simon Glass <sjg@chromium.org>
Bin Meng · Simon Glass
1 parent a34b46768f
Showing 6 changed files with 522 additions and 2 deletions Side-by-side Diff
arch/x86/Kconfig
arch/x86/include/asm/smbios.h
arch/x86/lib/Makefile
arch/x86/lib/smbios.c
arch/x86/lib/tables.c
doc/README.x86
@@ -358,6 +358,17 @@
 	  by the operating system. It defines platform-independent interfaces
 	  for configuration and power management monitoring.
  
+config GENERATE_SMBIOS_TABLE
+	bool "Generate an SMBIOS (System Management BIOS) table"
+	default y
+	help
+	  The System Management BIOS (SMBIOS) specification addresses how
+	  motherboard and system vendors present management information about
+	  their products in a standard format by extending the BIOS interface
+	  on Intel architecture systems.
+
+	  Check http://www.dmtf.org/standards/smbios for details.
+
 endmenu
  
 config MAX_PIRQ_LINKS
+/*
+ * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
+ *
+ * Adapted from coreboot src/include/smbios.h
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _SMBIOS_H_
+#define _SMBIOS_H_
+
+/* SMBIOS spec version implemented */
+#define SMBIOS_MAJOR_VER	3
+#define SMBIOS_MINOR_VER	0
+
+/* SMBIOS structure types */
+enum {
+	SMBIOS_BIOS_INFORMATION = 0,
+	SMBIOS_SYSTEM_INFORMATION = 1,
+	SMBIOS_BOARD_INFORMATION = 2,
+	SMBIOS_SYSTEM_ENCLOSURE = 3,
+	SMBIOS_PROCESSOR_INFORMATION = 4,
+	SMBIOS_CACHE_INFORMATION = 7,
+	SMBIOS_SYSTEM_SLOTS = 9,
+	SMBIOS_PHYS_MEMORY_ARRAY = 16,
+	SMBIOS_MEMORY_DEVICE = 17,
+	SMBIOS_MEMORY_ARRAY_MAPPED_ADDRESS = 19,
+	SMBIOS_SYSTEM_BOOT_INFORMATION = 32,
+	SMBIOS_END_OF_TABLE = 127
+};
+
+#define SMBIOS_INTERMEDIATE_OFFSET	16
+#define SMBIOS_STRUCT_EOS_BYTES		2
+
+struct __packed smbios_entry {
+	u8 anchor[4];
+	u8 checksum;
+	u8 length;
+	u8 major_ver;
+	u8 minor_ver;
+	u16 max_struct_size;
+	u8 entry_point_rev;
+	u8 formatted_area[5];
+	u8 intermediate_anchor[5];
+	u8 intermediate_checksum;
+	u16 struct_table_length;
+	u32 struct_table_address;
+	u16 struct_count;
+	u8 bcd_rev;
+};
+
+/* BIOS characteristics */
+#define BIOS_CHARACTERISTICS_PCI_SUPPORTED	(1 << 7)
+#define BIOS_CHARACTERISTICS_UPGRADEABLE	(1 << 11)
+#define BIOS_CHARACTERISTICS_SELECTABLE_BOOT	(1 << 16)
+
+#define BIOS_CHARACTERISTICS_EXT1_ACPI		(1 << 0)
+#define BIOS_CHARACTERISTICS_EXT2_TARGET	(1 << 2)
+
+struct __packed smbios_type0 {
+	u8 type;
+	u8 length;
+	u16 handle;
+	u8 vendor;
+	u8 bios_ver;
+	u16 bios_start_segment;
+	u8 bios_release_date;
+	u8 bios_rom_size;
+	u64 bios_characteristics;
+	u8 bios_characteristics_ext1;
+	u8 bios_characteristics_ext2;
+	u8 bios_major_release;
+	u8 bios_minor_release;
+	u8 ec_major_release;
+	u8 ec_minor_release;
+	char eos[SMBIOS_STRUCT_EOS_BYTES];
+};
+
+struct __packed smbios_type1 {
+	u8 type;
+	u8 length;
+	u16 handle;
+	u8 manufacturer;
+	u8 product_name;
+	u8 version;
+	u8 serial_number;
+	u8 uuid[16];
+	u8 wakeup_type;
+	u8 sku_number;
+	u8 family;
+	char eos[SMBIOS_STRUCT_EOS_BYTES];
+};
+
+#define SMBIOS_BOARD_FEATURE_HOSTING	(1 << 0)
+#define SMBIOS_BOARD_MOTHERBOARD	10
+
+struct __packed smbios_type2 {
+	u8 type;
+	u8 length;
+	u16 handle;
+	u8 manufacturer;
+	u8 product_name;
+	u8 version;
+	u8 serial_number;
+	u8 asset_tag_number;
+	u8 feature_flags;
+	u8 chassis_location;
+	u16 chassis_handle;
+	u8 board_type;
+	char eos[SMBIOS_STRUCT_EOS_BYTES];
+};
+
+#define SMBIOS_ENCLOSURE_DESKTOP	3
+#define SMBIOS_STATE_SAFE		3
+#define SMBIOS_SECURITY_NONE		3
+
+struct __packed smbios_type3 {
+	u8 type;
+	u8 length;
+	u16 handle;
+	u8 manufacturer;
+	u8 chassis_type;
+	u8 version;
+	u8 serial_number;
+	u8 asset_tag_number;
+	u8 bootup_state;
+	u8 power_supply_state;
+	u8 thermal_state;
+	u8 security_status;
+	u32 oem_defined;
+	u8 height;
+	u8 number_of_power_cords;
+	u8 element_count;
+	u8 element_record_length;
+	char eos[SMBIOS_STRUCT_EOS_BYTES];
+};
+
+#define SMBIOS_PROCESSOR_TYPE_CENTRAL	3
+#define SMBIOS_PROCESSOR_STATUS_ENABLED	1
+#define SMBIOS_PROCESSOR_UPGRADE_NONE	6
+
+struct __packed smbios_type4 {
+	u8 type;
+	u8 length;
+	u16 handle;
+	u8 socket_designation;
+	u8 processor_type;
+	u8 processor_family;
+	u8 processor_manufacturer;
+	u32 processor_id[2];
+	u8 processor_version;
+	u8 voltage;
+	u16 external_clock;
+	u16 max_speed;
+	u16 current_speed;
+	u8 status;
+	u8 processor_upgrade;
+	u16 l1_cache_handle;
+	u16 l2_cache_handle;
+	u16 l3_cache_handle;
+	u8 serial_number;
+	u8 asset_tag;
+	u8 part_number;
+	u8 core_count;
+	u8 core_enabled;
+	u8 thread_count;
+	u16 processor_characteristics;
+	u16 processor_family2;
+	u16 core_count2;
+	u16 core_enabled2;
+	u16 thread_count2;
+	char eos[SMBIOS_STRUCT_EOS_BYTES];
+};
+
+struct __packed smbios_type32 {
+	u8 type;
+	u8 length;
+	u16 handle;
+	u8 reserved[6];
+	u8 boot_status;
+	u8 eos[SMBIOS_STRUCT_EOS_BYTES];
+};
+
+struct __packed smbios_type127 {
+	u8 type;
+	u8 length;
+	u16 handle;
+	u8 eos[SMBIOS_STRUCT_EOS_BYTES];
+};
+
+struct __packed smbios_header {
+	u8 type;
+	u8 length;
+	u16 handle;
+};
+
+/**
+ * fill_smbios_header() - Fill the header of an SMBIOS table
+ *
+ * This fills the header of an SMBIOS table structure.
+ *
+ * @table:	start address of the structure
+ * @type:	the type of structure
+ * @length:	the length of the formatted area of the structure
+ * @handle:	the structure's handle, a unique 16-bit number
+ */
+static inline void fill_smbios_header(void *table, int type,
+				      int length, int handle)
+{
+	struct smbios_header *header = table;
+
+	header->type = type;
+	header->length = length - SMBIOS_STRUCT_EOS_BYTES;
+	header->handle = handle;
+}
+
+/**
+ * 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
+ * @return:	size of the structure
+ */
+typedef int (*smbios_write_type)(u32 *addr, int handle);
+
+/**
+ * write_smbios_table() - Write SMBIOS table
+ *
+ * This writes SMBIOS table at a given address.
+ *
+ * @addr:	start address to write SMBIOS table
+ * @return:	end address of SMBIOS table
+ */
+u32 write_smbios_table(u32 addr);
+
+#endif /* _SMBIOS_H_ */
@@ -30,6 +30,7 @@
 obj-y += physmem.o
 obj-$(CONFIG_X86_RAMTEST) += ramtest.o
 obj-y += sfi.o
+obj-$(CONFIG_GENERATE_SMBIOS_TABLE) += smbios.o
 obj-y	+= string.o
 obj-$(CONFIG_GENERATE_ACPI_TABLE) += acpi_table.o
 obj-y	+= tables.o
+/*
+ * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
+ *
+ * Adapted from coreboot src/arch/x86/smbios.c
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <version.h>
+#include <asm/cpu.h>
+#include <asm/smbios.h>
+#include <asm/tables.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/**
+ * smbios_add_string() - add a string to the string area
+ *
+ * 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
+ * @str:	string to add
+ * @return:	string number in the string area
+ */
+static int smbios_add_string(char *start, const char *str)
+{
+	int i = 1;
+	char *p = start;
+
+	for (;;) {
+		if (!*p) {
+			strcpy(p, str);
+			p += strlen(str);
+			*p++ = '\0';
+			*p++ = '\0';
+
+			return i;
+		}
+
+		if (!strcmp(p, str))
+			return i;
+
+		p += strlen(p) + 1;
+		i++;
+	}
+}
+
+/**
+ * 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
+ * @return:	string area size
+ */
+static int smbios_string_table_len(char *start)
+{
+	char *p = start;
+	int i, len = 0;
+
+	while (*p) {
+		i = strlen(p) + 1;
+		p += i;
+		len += i;
+	}
+
+	return len + 1;
+}
+
+static int smbios_write_type0(u32 *current, int handle)
+{
+	struct smbios_type0 *t = (struct smbios_type0 *)*current;
+	int len = sizeof(struct smbios_type0);
+
+	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);
+	t->bios_rom_size = (CONFIG_ROM_SIZE / 65536) - 1;
+	t->bios_characteristics = BIOS_CHARACTERISTICS_PCI_SUPPORTED |
+				  BIOS_CHARACTERISTICS_SELECTABLE_BOOT |
+				  BIOS_CHARACTERISTICS_UPGRADEABLE;
+#ifdef CONFIG_GENERATE_ACPI_TABLE
+	t->bios_characteristics_ext1 = BIOS_CHARACTERISTICS_EXT1_ACPI;
+#endif
+	t->bios_characteristics_ext2 = BIOS_CHARACTERISTICS_EXT2_TARGET;
+	t->bios_major_release = 0xff;
+	t->bios_minor_release = 0xff;
+	t->ec_major_release = 0xff;
+	t->ec_minor_release = 0xff;
+
+	len = t->length + smbios_string_table_len(t->eos);
+	*current += len;
+
+	return len;
+}
+
+static int smbios_write_type1(u32 *current, int handle)
+{
+	struct smbios_type1 *t = (struct smbios_type1 *)*current;
+	int len = sizeof(struct smbios_type1);
+
+	memset(t, 0, sizeof(struct smbios_type1));
+	fill_smbios_header(t, SMBIOS_SYSTEM_INFORMATION, len, handle);
+	t->manufacturer = smbios_add_string(t->eos, CONFIG_SYS_VENDOR);
+	t->product_name = smbios_add_string(t->eos, CONFIG_SYS_BOARD);
+
+	len = t->length + smbios_string_table_len(t->eos);
+	*current += len;
+
+	return len;
+}
+
+static int smbios_write_type2(u32 *current, int handle)
+{
+	struct smbios_type2 *t = (struct smbios_type2 *)*current;
+	int len = sizeof(struct smbios_type2);
+
+	memset(t, 0, sizeof(struct smbios_type2));
+	fill_smbios_header(t, SMBIOS_BOARD_INFORMATION, len, handle);
+	t->manufacturer = smbios_add_string(t->eos, CONFIG_SYS_VENDOR);
+	t->product_name = smbios_add_string(t->eos, CONFIG_SYS_BOARD);
+	t->feature_flags = SMBIOS_BOARD_FEATURE_HOSTING;
+	t->board_type = SMBIOS_BOARD_MOTHERBOARD;
+
+	len = t->length + smbios_string_table_len(t->eos);
+	*current += len;
+
+	return len;
+}
+
+static int smbios_write_type3(u32 *current, int handle)
+{
+	struct smbios_type3 *t = (struct smbios_type3 *)*current;
+	int len = sizeof(struct smbios_type3);
+
+	memset(t, 0, sizeof(struct smbios_type3));
+	fill_smbios_header(t, SMBIOS_SYSTEM_ENCLOSURE, len, handle);
+	t->manufacturer = smbios_add_string(t->eos, CONFIG_SYS_VENDOR);
+	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);
+	*current += len;
+
+	return len;
+}
+
+static int smbios_write_type4(u32 *current, int handle)
+{
+	struct smbios_type4 *t = (struct smbios_type4 *)*current;
+	int len = sizeof(struct smbios_type4);
+	const char *vendor;
+	char *name;
+	char processor_name[CPU_MAX_NAME_LEN];
+	struct cpuid_result res;
+
+	memset(t, 0, sizeof(struct smbios_type4));
+	fill_smbios_header(t, SMBIOS_PROCESSOR_INFORMATION, len, handle);
+	t->processor_type = SMBIOS_PROCESSOR_TYPE_CENTRAL;
+	t->processor_family = gd->arch.x86;
+	vendor = cpu_vendor_name(gd->arch.x86_vendor);
+	t->processor_manufacturer = smbios_add_string(t->eos, vendor);
+	res = cpuid(1);
+	t->processor_id[0] = res.eax;
+	t->processor_id[1] = res.edx;
+	name = cpu_get_name(processor_name);
+	t->processor_version = smbios_add_string(t->eos, name);
+	t->status = SMBIOS_PROCESSOR_STATUS_ENABLED;
+	t->processor_upgrade = SMBIOS_PROCESSOR_UPGRADE_NONE;
+	t->l1_cache_handle = 0xffff;
+	t->l2_cache_handle = 0xffff;
+	t->l3_cache_handle = 0xffff;
+	t->processor_family2 = t->processor_family;
+
+	len = t->length + smbios_string_table_len(t->eos);
+	*current += len;
+
+	return len;
+}
+
+static int smbios_write_type32(u32 *current, int handle)
+{
+	struct smbios_type32 *t = (struct smbios_type32 *)*current;
+	int len = sizeof(struct smbios_type32);
+
+	memset(t, 0, sizeof(struct smbios_type32));
+	fill_smbios_header(t, SMBIOS_SYSTEM_BOOT_INFORMATION, len, handle);
+
+	*current += len;
+
+	return len;
+}
+
+static int smbios_write_type127(u32 *current, int handle)
+{
+	struct smbios_type127 *t = (struct smbios_type127 *)*current;
+	int len = sizeof(struct smbios_type127);
+
+	memset(t, 0, sizeof(struct smbios_type127));
+	fill_smbios_header(t, SMBIOS_END_OF_TABLE, len, handle);
+
+	*current += len;
+
+	return len;
+}
+
+static smbios_write_type smbios_write_funcs[] = {
+	smbios_write_type0,
+	smbios_write_type1,
+	smbios_write_type2,
+	smbios_write_type3,
+	smbios_write_type4,
+	smbios_write_type32,
+	smbios_write_type127
+};
+
+u32 write_smbios_table(u32 addr)
+{
+	struct smbios_entry *se;
+	u32 tables;
+	int len = 0;
+	int max_struct_size = 0;
+	int handle = 0;
+	char *istart;
+	int isize;
+	int i;
+
+	/* 16 byte align the table address */
+	addr = ALIGN(addr, 16);
+
+	se = (struct smbios_entry *)addr;
+	memset(se, 0, sizeof(struct smbios_entry));
+
+	addr += sizeof(struct smbios_entry);
+	addr = ALIGN(addr, 16);
+	tables = addr;
+
+	/* populate minimum required tables */
+	for (i = 0; i < ARRAY_SIZE(smbios_write_funcs); i++) {
+		int tmp = smbios_write_funcs[i](&addr, handle++);
+		max_struct_size = max(max_struct_size, tmp);
+		len += tmp;
+	}
+
+	memcpy(se->anchor, "_SM_", 4);
+	se->length = sizeof(struct smbios_entry);
+	se->major_ver = SMBIOS_MAJOR_VER;
+	se->minor_ver = SMBIOS_MINOR_VER;
+	se->max_struct_size = max_struct_size;
+	memcpy(se->intermediate_anchor, "_DMI_", 5);
+	se->struct_table_length = len;
+	se->struct_table_address = tables;
+	se->struct_count = handle;
+
+	/* calculate checksums */
+	istart = (char *)se + SMBIOS_INTERMEDIATE_OFFSET;
+	isize = sizeof(struct smbios_entry) - SMBIOS_INTERMEDIATE_OFFSET;
+	se->intermediate_checksum = table_compute_checksum(istart, isize);
+	se->checksum = table_compute_checksum(se, sizeof(struct smbios_entry));
+
+	return addr;
+}
@@ -7,6 +7,7 @@
 #include <common.h>
 #include <asm/sfi.h>
 #include <asm/mpspec.h>
+#include <asm/smbios.h>
 #include <asm/tables.h>
 #include <asm/acpi_table.h>
  
@@ -54,6 +55,10 @@
 #endif
 #ifdef CONFIG_GENERATE_ACPI_TABLE
 	rom_table_end = write_acpi_tables(rom_table_end);
+	rom_table_end = ALIGN(rom_table_end, 1024);
+#endif
+#ifdef CONFIG_GENERATE_SMBIOS_TABLE
+	rom_table_end = write_smbios_table(rom_table_end);
 	rom_table_end = ALIGN(rom_table_end, 1024);
 #endif
 }
@@ -764,7 +764,6 @@
 - Audio
 - Chrome OS verified boot
 - SMI and ACPI support, to provide platform info and facilities to Linux
-- Desktop Management Interface (DMI) [15] support
  
 References
 ----------
@@ -782,5 +781,4 @@
 [12] http://events.linuxfoundation.org/sites/events/files/slides/chromeos_and_diy_vboot_0.pdf
 [13] http://events.linuxfoundation.org/sites/events/files/slides/elce-2014.pdf
 [14] doc/device-tree-bindings/misc/intel,irq-router.txt
-[15] http://en.wikipedia.org/wiki/Desktop_Management_Interface
...	...	@@ -358,6 +358,17 @@
358	358	by the operating system. It defines platform-independent interfaces
359	359	for configuration and power management monitoring.
360	360
	361	+config GENERATE_SMBIOS_TABLE
	362	+ bool "Generate an SMBIOS (System Management BIOS) table"
	363	+ default y
	364	+ help
	365	+ The System Management BIOS (SMBIOS) specification addresses how
	366	+ motherboard and system vendors present management information about
	367	+ their products in a standard format by extending the BIOS interface
	368	+ on Intel architecture systems.
	369	+
	370	+ Check http://www.dmtf.org/standards/smbios for details.
	371	+
361	372	endmenu
362	373
363	374	config MAX_PIRQ_LINKS
	1	+/*
	2	+ * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
	3	+ *
	4	+ * Adapted from coreboot src/include/smbios.h
	5	+ *
	6	+ * SPDX-License-Identifier: GPL-2.0+
	7	+ */
	8	+
	9	+#ifndef _SMBIOS_H_
	10	+#define _SMBIOS_H_
	11	+
	12	+/* SMBIOS spec version implemented */
	13	+#define SMBIOS_MAJOR_VER 3
	14	+#define SMBIOS_MINOR_VER 0
	15	+
	16	+/* SMBIOS structure types */
	17	+enum {
	18	+ SMBIOS_BIOS_INFORMATION = 0,
	19	+ SMBIOS_SYSTEM_INFORMATION = 1,
	20	+ SMBIOS_BOARD_INFORMATION = 2,
	21	+ SMBIOS_SYSTEM_ENCLOSURE = 3,
	22	+ SMBIOS_PROCESSOR_INFORMATION = 4,
	23	+ SMBIOS_CACHE_INFORMATION = 7,
	24	+ SMBIOS_SYSTEM_SLOTS = 9,
	25	+ SMBIOS_PHYS_MEMORY_ARRAY = 16,
	26	+ SMBIOS_MEMORY_DEVICE = 17,
	27	+ SMBIOS_MEMORY_ARRAY_MAPPED_ADDRESS = 19,
	28	+ SMBIOS_SYSTEM_BOOT_INFORMATION = 32,
	29	+ SMBIOS_END_OF_TABLE = 127
	30	+};
	31	+
	32	+#define SMBIOS_INTERMEDIATE_OFFSET 16
	33	+#define SMBIOS_STRUCT_EOS_BYTES 2
	34	+
	35	+struct __packed smbios_entry {
	36	+ u8 anchor[4];
	37	+ u8 checksum;
	38	+ u8 length;
	39	+ u8 major_ver;
	40	+ u8 minor_ver;
	41	+ u16 max_struct_size;
	42	+ u8 entry_point_rev;
	43	+ u8 formatted_area[5];
	44	+ u8 intermediate_anchor[5];
	45	+ u8 intermediate_checksum;
	46	+ u16 struct_table_length;
	47	+ u32 struct_table_address;
	48	+ u16 struct_count;
	49	+ u8 bcd_rev;
	50	+};
	51	+
	52	+/* BIOS characteristics */
	53	+#define BIOS_CHARACTERISTICS_PCI_SUPPORTED (1 << 7)
	54	+#define BIOS_CHARACTERISTICS_UPGRADEABLE (1 << 11)
	55	+#define BIOS_CHARACTERISTICS_SELECTABLE_BOOT (1 << 16)
	56	+
	57	+#define BIOS_CHARACTERISTICS_EXT1_ACPI (1 << 0)
	58	+#define BIOS_CHARACTERISTICS_EXT2_TARGET (1 << 2)
	59	+
	60	+struct __packed smbios_type0 {
	61	+ u8 type;
	62	+ u8 length;
	63	+ u16 handle;
	64	+ u8 vendor;
	65	+ u8 bios_ver;
	66	+ u16 bios_start_segment;
	67	+ u8 bios_release_date;
	68	+ u8 bios_rom_size;
	69	+ u64 bios_characteristics;
	70	+ u8 bios_characteristics_ext1;
	71	+ u8 bios_characteristics_ext2;
	72	+ u8 bios_major_release;
	73	+ u8 bios_minor_release;
	74	+ u8 ec_major_release;
	75	+ u8 ec_minor_release;
	76	+ char eos[SMBIOS_STRUCT_EOS_BYTES];
	77	+};
	78	+
	79	+struct __packed smbios_type1 {
	80	+ u8 type;
	81	+ u8 length;
	82	+ u16 handle;
	83	+ u8 manufacturer;
	84	+ u8 product_name;
	85	+ u8 version;
	86	+ u8 serial_number;
	87	+ u8 uuid[16];
	88	+ u8 wakeup_type;
	89	+ u8 sku_number;
	90	+ u8 family;
	91	+ char eos[SMBIOS_STRUCT_EOS_BYTES];
	92	+};
	93	+
	94	+#define SMBIOS_BOARD_FEATURE_HOSTING (1 << 0)
	95	+#define SMBIOS_BOARD_MOTHERBOARD 10
	96	+
	97	+struct __packed smbios_type2 {
	98	+ u8 type;
	99	+ u8 length;
	100	+ u16 handle;
	101	+ u8 manufacturer;
	102	+ u8 product_name;
	103	+ u8 version;
	104	+ u8 serial_number;
	105	+ u8 asset_tag_number;
	106	+ u8 feature_flags;
	107	+ u8 chassis_location;
	108	+ u16 chassis_handle;
	109	+ u8 board_type;
	110	+ char eos[SMBIOS_STRUCT_EOS_BYTES];
	111	+};
	112	+
	113	+#define SMBIOS_ENCLOSURE_DESKTOP 3
	114	+#define SMBIOS_STATE_SAFE 3
	115	+#define SMBIOS_SECURITY_NONE 3
	116	+
	117	+struct __packed smbios_type3 {
	118	+ u8 type;
	119	+ u8 length;
	120	+ u16 handle;
	121	+ u8 manufacturer;
	122	+ u8 chassis_type;
	123	+ u8 version;
	124	+ u8 serial_number;
	125	+ u8 asset_tag_number;
	126	+ u8 bootup_state;
	127	+ u8 power_supply_state;
	128	+ u8 thermal_state;
	129	+ u8 security_status;
	130	+ u32 oem_defined;
	131	+ u8 height;
	132	+ u8 number_of_power_cords;
	133	+ u8 element_count;
	134	+ u8 element_record_length;
	135	+ char eos[SMBIOS_STRUCT_EOS_BYTES];
	136	+};
	137	+
	138	+#define SMBIOS_PROCESSOR_TYPE_CENTRAL 3
	139	+#define SMBIOS_PROCESSOR_STATUS_ENABLED 1
	140	+#define SMBIOS_PROCESSOR_UPGRADE_NONE 6
	141	+
	142	+struct __packed smbios_type4 {
	143	+ u8 type;
	144	+ u8 length;
	145	+ u16 handle;
	146	+ u8 socket_designation;
	147	+ u8 processor_type;
	148	+ u8 processor_family;
	149	+ u8 processor_manufacturer;
	150	+ u32 processor_id[2];
	151	+ u8 processor_version;
	152	+ u8 voltage;
	153	+ u16 external_clock;
	154	+ u16 max_speed;
	155	+ u16 current_speed;
	156	+ u8 status;
	157	+ u8 processor_upgrade;
	158	+ u16 l1_cache_handle;
	159	+ u16 l2_cache_handle;
	160	+ u16 l3_cache_handle;
	161	+ u8 serial_number;
	162	+ u8 asset_tag;
	163	+ u8 part_number;
	164	+ u8 core_count;
	165	+ u8 core_enabled;
	166	+ u8 thread_count;
	167	+ u16 processor_characteristics;
	168	+ u16 processor_family2;
	169	+ u16 core_count2;
	170	+ u16 core_enabled2;
	171	+ u16 thread_count2;
	172	+ char eos[SMBIOS_STRUCT_EOS_BYTES];
	173	+};
	174	+
	175	+struct __packed smbios_type32 {
	176	+ u8 type;
	177	+ u8 length;
	178	+ u16 handle;
	179	+ u8 reserved[6];
	180	+ u8 boot_status;
	181	+ u8 eos[SMBIOS_STRUCT_EOS_BYTES];
	182	+};
	183	+
	184	+struct __packed smbios_type127 {
	185	+ u8 type;
	186	+ u8 length;
	187	+ u16 handle;
	188	+ u8 eos[SMBIOS_STRUCT_EOS_BYTES];
	189	+};
	190	+
	191	+struct __packed smbios_header {
	192	+ u8 type;
	193	+ u8 length;
	194	+ u16 handle;
	195	+};
	196	+
	197	+/**
	198	+ * fill_smbios_header() - Fill the header of an SMBIOS table
	199	+ *
	200	+ * This fills the header of an SMBIOS table structure.
	201	+ *
	202	+ * @table: start address of the structure
	203	+ * @type: the type of structure
	204	+ * @length: the length of the formatted area of the structure
	205	+ * @handle: the structure's handle, a unique 16-bit number
	206	+ */
	207	+static inline void fill_smbios_header(void *table, int type,
	208	+ int length, int handle)
	209	+{
	210	+ struct smbios_header *header = table;
	211	+
	212	+ header->type = type;
	213	+ header->length = length - SMBIOS_STRUCT_EOS_BYTES;
	214	+ header->handle = handle;
	215	+}
	216	+
	217	+/**
	218	+ * Function prototype to write a specific type of SMBIOS structure
	219	+ *
	220	+ * @addr: start address to write the structure
	221	+ * @handle: the structure's handle, a unique 16-bit number
	222	+ * @return: size of the structure
	223	+ */
	224	+typedef int (smbios_write_type)(u32 addr, int handle);
	225	+
	226	+/**
	227	+ * write_smbios_table() - Write SMBIOS table
	228	+ *
	229	+ * This writes SMBIOS table at a given address.
	230	+ *
	231	+ * @addr: start address to write SMBIOS table
	232	+ * @return: end address of SMBIOS table
	233	+ */
	234	+u32 write_smbios_table(u32 addr);
	235	+
	236	+#endif /* _SMBIOS_H_ */
...	...	@@ -30,6 +30,7 @@
30	30	obj-y += physmem.o
31	31	obj-$(CONFIG_X86_RAMTEST) += ramtest.o
32	32	obj-y += sfi.o
	33	+obj-$(CONFIG_GENERATE_SMBIOS_TABLE) += smbios.o
33	34	obj-y += string.o
34	35	obj-$(CONFIG_GENERATE_ACPI_TABLE) += acpi_table.o
35	36	obj-y += tables.o
	1	+/*
	2	+ * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
	3	+ *
	4	+ * Adapted from coreboot src/arch/x86/smbios.c
	5	+ *
	6	+ * SPDX-License-Identifier: GPL-2.0+
	7	+ */
	8	+
	9	+#include <common.h>
	10	+#include <version.h>
	11	+#include <asm/cpu.h>
	12	+#include <asm/smbios.h>
	13	+#include <asm/tables.h>
	14	+
	15	+DECLARE_GLOBAL_DATA_PTR;
	16	+
	17	+/**
	18	+ * smbios_add_string() - add a string to the string area
	19	+ *
	20	+ * This adds a string to the string area which is appended directly after
	21	+ * the formatted portion of an SMBIOS structure.
	22	+ *
	23	+ * @start: string area start address
	24	+ * @str: string to add
	25	+ * @return: string number in the string area
	26	+ */
	27	+static int smbios_add_string(char start, const char str)
	28	+{
	29	+ int i = 1;
	30	+ char *p = start;
	31	+
	32	+ for (;;) {
	33	+ if (!*p) {
	34	+ strcpy(p, str);
	35	+ p += strlen(str);
	36	+ *p++ = '\0';
	37	+ *p++ = '\0';
	38	+
	39	+ return i;
	40	+ }
	41	+
	42	+ if (!strcmp(p, str))
	43	+ return i;
	44	+
	45	+ p += strlen(p) + 1;
	46	+ i++;
	47	+ }
	48	+}
	49	+
	50	+/**
	51	+ * smbios_string_table_len() - compute the string area size
	52	+ *
	53	+ * This computes the size of the string area including the string terminator.
	54	+ *
	55	+ * @start: string area start address
	56	+ * @return: string area size
	57	+ */
	58	+static int smbios_string_table_len(char *start)
	59	+{
	60	+ char *p = start;
	61	+ int i, len = 0;
	62	+
	63	+ while (*p) {
	64	+ i = strlen(p) + 1;
	65	+ p += i;
	66	+ len += i;
	67	+ }
	68	+
	69	+ return len + 1;
	70	+}
	71	+
	72	+static int smbios_write_type0(u32 *current, int handle)
	73	+{
	74	+ struct smbios_type0 t = (struct smbios_type0 )*current;
	75	+ int len = sizeof(struct smbios_type0);
	76	+
	77	+ memset(t, 0, sizeof(struct smbios_type0));
	78	+ fill_smbios_header(t, SMBIOS_BIOS_INFORMATION, len, handle);
	79	+ t->vendor = smbios_add_string(t->eos, "U-Boot");
	80	+ t->bios_ver = smbios_add_string(t->eos, PLAIN_VERSION);
	81	+ t->bios_release_date = smbios_add_string(t->eos, U_BOOT_DMI_DATE);
	82	+ t->bios_rom_size = (CONFIG_ROM_SIZE / 65536) - 1;
	83	+ t->bios_characteristics = BIOS_CHARACTERISTICS_PCI_SUPPORTED \|
	84	+ BIOS_CHARACTERISTICS_SELECTABLE_BOOT \|
	85	+ BIOS_CHARACTERISTICS_UPGRADEABLE;
	86	+#ifdef CONFIG_GENERATE_ACPI_TABLE
	87	+ t->bios_characteristics_ext1 = BIOS_CHARACTERISTICS_EXT1_ACPI;
	88	+#endif
	89	+ t->bios_characteristics_ext2 = BIOS_CHARACTERISTICS_EXT2_TARGET;
	90	+ t->bios_major_release = 0xff;
	91	+ t->bios_minor_release = 0xff;
	92	+ t->ec_major_release = 0xff;
	93	+ t->ec_minor_release = 0xff;
	94	+
	95	+ len = t->length + smbios_string_table_len(t->eos);
	96	+ *current += len;
	97	+
	98	+ return len;
	99	+}
	100	+
	101	+static int smbios_write_type1(u32 *current, int handle)
	102	+{
	103	+ struct smbios_type1 t = (struct smbios_type1 )*current;
	104	+ int len = sizeof(struct smbios_type1);
	105	+
	106	+ memset(t, 0, sizeof(struct smbios_type1));
	107	+ fill_smbios_header(t, SMBIOS_SYSTEM_INFORMATION, len, handle);
	108	+ t->manufacturer = smbios_add_string(t->eos, CONFIG_SYS_VENDOR);
	109	+ t->product_name = smbios_add_string(t->eos, CONFIG_SYS_BOARD);
	110	+
	111	+ len = t->length + smbios_string_table_len(t->eos);
	112	+ *current += len;
	113	+
	114	+ return len;
	115	+}
	116	+
	117	+static int smbios_write_type2(u32 *current, int handle)
	118	+{
	119	+ struct smbios_type2 t = (struct smbios_type2 )*current;
	120	+ int len = sizeof(struct smbios_type2);
	121	+
	122	+ memset(t, 0, sizeof(struct smbios_type2));
	123	+ fill_smbios_header(t, SMBIOS_BOARD_INFORMATION, len, handle);
	124	+ t->manufacturer = smbios_add_string(t->eos, CONFIG_SYS_VENDOR);
	125	+ t->product_name = smbios_add_string(t->eos, CONFIG_SYS_BOARD);
	126	+ t->feature_flags = SMBIOS_BOARD_FEATURE_HOSTING;
	127	+ t->board_type = SMBIOS_BOARD_MOTHERBOARD;
	128	+
	129	+ len = t->length + smbios_string_table_len(t->eos);
	130	+ *current += len;
	131	+
	132	+ return len;
	133	+}
	134	+
	135	+static int smbios_write_type3(u32 *current, int handle)
	136	+{
	137	+ struct smbios_type3 t = (struct smbios_type3 )*current;
	138	+ int len = sizeof(struct smbios_type3);
	139	+
	140	+ memset(t, 0, sizeof(struct smbios_type3));
	141	+ fill_smbios_header(t, SMBIOS_SYSTEM_ENCLOSURE, len, handle);
	142	+ t->manufacturer = smbios_add_string(t->eos, CONFIG_SYS_VENDOR);
	143	+ t->chassis_type = SMBIOS_ENCLOSURE_DESKTOP;
	144	+ t->bootup_state = SMBIOS_STATE_SAFE;
	145	+ t->power_supply_state = SMBIOS_STATE_SAFE;
	146	+ t->thermal_state = SMBIOS_STATE_SAFE;
	147	+ t->security_status = SMBIOS_SECURITY_NONE;
	148	+
	149	+ len = t->length + smbios_string_table_len(t->eos);
	150	+ *current += len;
	151	+
	152	+ return len;
	153	+}
	154	+
	155	+static int smbios_write_type4(u32 *current, int handle)
	156	+{
	157	+ struct smbios_type4 t = (struct smbios_type4 )*current;
	158	+ int len = sizeof(struct smbios_type4);
	159	+ const char *vendor;
	160	+ char *name;
	161	+ char processor_name[CPU_MAX_NAME_LEN];
	162	+ struct cpuid_result res;
	163	+
	164	+ memset(t, 0, sizeof(struct smbios_type4));
	165	+ fill_smbios_header(t, SMBIOS_PROCESSOR_INFORMATION, len, handle);
	166	+ t->processor_type = SMBIOS_PROCESSOR_TYPE_CENTRAL;
	167	+ t->processor_family = gd->arch.x86;
	168	+ vendor = cpu_vendor_name(gd->arch.x86_vendor);
	169	+ t->processor_manufacturer = smbios_add_string(t->eos, vendor);
	170	+ res = cpuid(1);
	171	+ t->processor_id[0] = res.eax;
	172	+ t->processor_id[1] = res.edx;
	173	+ name = cpu_get_name(processor_name);
	174	+ t->processor_version = smbios_add_string(t->eos, name);
	175	+ t->status = SMBIOS_PROCESSOR_STATUS_ENABLED;
	176	+ t->processor_upgrade = SMBIOS_PROCESSOR_UPGRADE_NONE;
	177	+ t->l1_cache_handle = 0xffff;
	178	+ t->l2_cache_handle = 0xffff;
	179	+ t->l3_cache_handle = 0xffff;
	180	+ t->processor_family2 = t->processor_family;
	181	+
	182	+ len = t->length + smbios_string_table_len(t->eos);
	183	+ *current += len;
	184	+
	185	+ return len;
	186	+}
	187	+
	188	+static int smbios_write_type32(u32 *current, int handle)
	189	+{
	190	+ struct smbios_type32 t = (struct smbios_type32 )*current;
	191	+ int len = sizeof(struct smbios_type32);
	192	+
	193	+ memset(t, 0, sizeof(struct smbios_type32));
	194	+ fill_smbios_header(t, SMBIOS_SYSTEM_BOOT_INFORMATION, len, handle);
	195	+
	196	+ *current += len;
	197	+
	198	+ return len;
	199	+}
	200	+
	201	+static int smbios_write_type127(u32 *current, int handle)
	202	+{
	203	+ struct smbios_type127 t = (struct smbios_type127 )*current;
	204	+ int len = sizeof(struct smbios_type127);
	205	+
	206	+ memset(t, 0, sizeof(struct smbios_type127));
	207	+ fill_smbios_header(t, SMBIOS_END_OF_TABLE, len, handle);
	208	+
	209	+ *current += len;
	210	+
	211	+ return len;
	212	+}
	213	+
	214	+static smbios_write_type smbios_write_funcs[] = {
	215	+ smbios_write_type0,
	216	+ smbios_write_type1,
	217	+ smbios_write_type2,
	218	+ smbios_write_type3,
	219	+ smbios_write_type4,
	220	+ smbios_write_type32,
	221	+ smbios_write_type127
	222	+};
	223	+
	224	+u32 write_smbios_table(u32 addr)
	225	+{
	226	+ struct smbios_entry *se;
	227	+ u32 tables;
	228	+ int len = 0;
	229	+ int max_struct_size = 0;
	230	+ int handle = 0;
	231	+ char *istart;
	232	+ int isize;
	233	+ int i;
	234	+
	235	+ /* 16 byte align the table address */
	236	+ addr = ALIGN(addr, 16);
	237	+
	238	+ se = (struct smbios_entry *)addr;
	239	+ memset(se, 0, sizeof(struct smbios_entry));
	240	+
	241	+ addr += sizeof(struct smbios_entry);
	242	+ addr = ALIGN(addr, 16);
	243	+ tables = addr;
	244	+
	245	+ /* populate minimum required tables */
	246	+ for (i = 0; i < ARRAY_SIZE(smbios_write_funcs); i++) {
	247	+ int tmp = smbios_write_funcs[i](&addr, handle++);
	248	+ max_struct_size = max(max_struct_size, tmp);
	249	+ len += tmp;
	250	+ }
	251	+
	252	+ memcpy(se->anchor, "_SM_", 4);
	253	+ se->length = sizeof(struct smbios_entry);
	254	+ se->major_ver = SMBIOS_MAJOR_VER;
	255	+ se->minor_ver = SMBIOS_MINOR_VER;
	256	+ se->max_struct_size = max_struct_size;
	257	+ memcpy(se->intermediate_anchor, "_DMI_", 5);
	258	+ se->struct_table_length = len;
	259	+ se->struct_table_address = tables;
	260	+ se->struct_count = handle;
	261	+
	262	+ /* calculate checksums */
	263	+ istart = (char *)se + SMBIOS_INTERMEDIATE_OFFSET;
	264	+ isize = sizeof(struct smbios_entry) - SMBIOS_INTERMEDIATE_OFFSET;
	265	+ se->intermediate_checksum = table_compute_checksum(istart, isize);
	266	+ se->checksum = table_compute_checksum(se, sizeof(struct smbios_entry));
	267	+
	268	+ return addr;
	269	+}
...	...	@@ -7,6 +7,7 @@
7	7	#include <common.h>
8	8	#include <asm/sfi.h>
9	9	#include <asm/mpspec.h>
	10	+#include <asm/smbios.h>
10	11	#include <asm/tables.h>
11	12	#include <asm/acpi_table.h>
12	13
...	...	@@ -54,6 +55,10 @@
54	55	#endif
55	56	#ifdef CONFIG_GENERATE_ACPI_TABLE
56	57	rom_table_end = write_acpi_tables(rom_table_end);
	58	+ rom_table_end = ALIGN(rom_table_end, 1024);
	59	+#endif
	60	+#ifdef CONFIG_GENERATE_SMBIOS_TABLE
	61	+ rom_table_end = write_smbios_table(rom_table_end);
57	62	rom_table_end = ALIGN(rom_table_end, 1024);
58	63	#endif
59	64	}
...	...	@@ -764,7 +764,6 @@
764	764	- Audio
765	765	- Chrome OS verified boot
766	766	- SMI and ACPI support, to provide platform info and facilities to Linux
767		-- Desktop Management Interface (DMI) [15] support
768	767
769	768	References
770	769	----------
...	...	@@ -782,5 +781,4 @@
782	781	[12] http://events.linuxfoundation.org/sites/events/files/slides/chromeos_and_diy_vboot_0.pdf
783	782	[13] http://events.linuxfoundation.org/sites/events/files/slides/elce-2014.pdf
784	783	[14] doc/device-tree-bindings/misc/intel,irq-router.txt
785		-[15] http://en.wikipedia.org/wiki/Desktop_Management_Interface