From 721e992a8af5e80b2a95a0bc92c9880f2056190b Mon Sep 17 00:00:00 2001 From: Bin Meng Date: Mon, 12 Oct 2015 05:23:41 -0700 Subject: [PATCH] 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 Acked-by: Simon Glass --- 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 5e42d7d6a7..bf09b21067 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 0000000000..623a703693 --- /dev/null +++ b/arch/x86/include/asm/smbios.h @@ -0,0 +1,236 @@ +/* + * Copyright (C) 2015, Bin Meng + * + * 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 169062e718..4ac99560ab 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 0000000000..441fca99f1 --- /dev/null +++ b/arch/x86/lib/smbios.c @@ -0,0 +1,269 @@ +/* + * Copyright (C) 2015, Bin Meng + * + * Adapted from coreboot src/arch/x86/smbios.c + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include +#include + +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 f15b2e2855..14b15cf389 100644 --- a/arch/x86/lib/tables.c +++ b/arch/x86/lib/tables.c @@ -7,6 +7,7 @@ #include #include #include +#include #include #include @@ -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 a4f5321c16..18fed82c07 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 -- 2.25.1