[U-Boot] [PATCH 2/2] x86: Add SMBIOS table support
Bin Meng
bmeng.cn at gmail.com
Mon Oct 12 14:23:41 CEST 2015
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 at gmail.com>
---
Changes in v2:
- Add comments for smbios_add_string() and smbios_string_table_len()
- Add inline function fill_smbios_header() to fill the table header
- Remove update_max() macro, instead use a function pointer table
to handle the writing of each table structure
- Add writing SMBIOS type2 table (similar to type1)
arch/x86/Kconfig | 11 ++
arch/x86/include/asm/smbios.h | 236 ++++++++++++++++++++++++++++++++++++
arch/x86/lib/Makefile | 1 +
arch/x86/lib/smbios.c | 269 ++++++++++++++++++++++++++++++++++++++++++
arch/x86/lib/tables.c | 5 +
doc/README.x86 | 2 -
6 files changed, 522 insertions(+), 2 deletions(-)
create mode 100644 arch/x86/include/asm/smbios.h
create mode 100644 arch/x86/lib/smbios.c
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 5e42d7d..bf09b21 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -358,6 +358,17 @@ config GENERATE_ACPI_TABLE
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
diff --git a/arch/x86/include/asm/smbios.h b/arch/x86/include/asm/smbios.h
new file mode 100644
index 0000000..623a703
--- /dev/null
+++ b/arch/x86/include/asm/smbios.h
@@ -0,0 +1,236 @@
+/*
+ * Copyright (C) 2015, Bin Meng <bmeng.cn at 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_ */
diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile
index 169062e..4ac9956 100644
--- a/arch/x86/lib/Makefile
+++ b/arch/x86/lib/Makefile
@@ -30,6 +30,7 @@ obj-y += relocate.o
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
diff --git a/arch/x86/lib/smbios.c b/arch/x86/lib/smbios.c
new file mode 100644
index 0000000..441fca9
--- /dev/null
+++ b/arch/x86/lib/smbios.c
@@ -0,0 +1,269 @@
+/*
+ * Copyright (C) 2015, Bin Meng <bmeng.cn at 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;
+}
diff --git a/arch/x86/lib/tables.c b/arch/x86/lib/tables.c
index f15b2e2..14b15cf 100644
--- a/arch/x86/lib/tables.c
+++ b/arch/x86/lib/tables.c
@@ -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>
@@ -56,4 +57,8 @@ void write_tables(void)
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
}
diff --git a/doc/README.x86 b/doc/README.x86
index a4f5321..18fed82 100644
--- a/doc/README.x86
+++ b/doc/README.x86
@@ -764,7 +764,6 @@ TODO List
- Audio
- Chrome OS verified boot
- SMI and ACPI support, to provide platform info and facilities to Linux
-- Desktop Management Interface (DMI) [15] support
References
----------
@@ -782,4 +781,3 @@ References
[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
--
1.8.2.1
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