Date: Tue, 18 Apr 2023 03:21:43 GMT From: "Stephen J. Kiernan" <stevek@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: b5c3ade7657a - main - libsa: Update comments about SMBIOS specification Message-ID: <202304180321.33I3LhxW024029@gitrepo.freebsd.org>
next in thread | raw e-mail | index | archive | help
The branch main has been updated by stevek: URL: https://cgit.FreeBSD.org/src/commit/?id=b5c3ade7657a0ebb0c0f829d90919858a39dba94 commit b5c3ade7657a0ebb0c0f829d90919858a39dba94 Author: Stephen J. Kiernan <stevek@FreeBSD.org> AuthorDate: 2023-04-18 01:36:37 +0000 Commit: Stephen J. Kiernan <stevek@FreeBSD.org> CommitDate: 2023-04-18 03:21:04 +0000 libsa: Update comments about SMBIOS specification Summary: Include details from the SMBIOS 3 specification and some additional details for SMBIOS 2.1. Obtained from: Juniper Networks, Inc. Reviewers: jmg, manu Subscribers: imp, dab Differential Revision: https://reviews.freebsd.org/D39635 --- stand/libsa/smbios.c | 47 +++++++++++++++++++++++++++++++++++++++++------ 1 file changed, 41 insertions(+), 6 deletions(-) diff --git a/stand/libsa/smbios.c b/stand/libsa/smbios.c index 1bb78faa3b01..257aa15bd5f5 100644 --- a/stand/libsa/smbios.c +++ b/stand/libsa/smbios.c @@ -43,16 +43,51 @@ __FBSDID("$FreeBSD$"); * * System Management BIOS Reference Specification, v2.6 Final * http://www.dmtf.org/standards/published_documents/DSP0134_2.6.0.pdf + * + * System Management BIOS (SMBIOS) Reference Specification, 3.6.0 + * https://www.dmtf.org/sites/default/files/standards/documents/DSP0134_3.6.0.pdf */ /* - * 2.1.1 SMBIOS Structure Table Entry Point + * The first quoted paragraph below can also be found in section 2.1.1 SMBIOS + * Structure Table Entry Point of System Management BIOS Reference + * Specification, v2.6 Final + * + * (From System Management BIOS (SMBIOS) Reference Specification, 3.6.0) + * 5.2.1 SMBIOS 2.1 (32-bit) Entry Point + * + * "On non-UEFI systems, the 32-bit SMBIOS Entry Point structure, can be + * located by application software by searching for the anchor-string on + * paragraph (16-byte) boundaries within the physical memory address + * range 000F0000h to 000FFFFFh. This entry point encapsulates an intermediate + * anchor string that is used by some existing DMI browsers. + * + * On UEFI-based systems, the SMBIOS Entry Point structure can be located by + * looking in the EFI Configuration Table for the SMBIOS GUID + * (SMBIOS_TABLE_GUID, {EB9D2D31-2D88-11D3-9A16-0090273FC14D}) and using the + * associated pointer. See section 4.6 of the UEFI Specification for details. + * See section 2.3 of the UEFI Specification for how to report the containing + * memory type. + * + * NOTE While the SMBIOS Major and Minor Versions (offsets 06h and 07h) + * currently duplicate the information that is present in the SMBIOS BCD + * Revision (offset 1Eh), they provide a path for future growth in this + * specification. The BCD Revision, for example, provides only a single digit + * for each of the major and minor version numbers." + * + * 5.2.2 SMBIOS 860 3.0 (64-bit) Entry Point + * + * "On non-UEFI systems, the 64-bit SMBIOS Entry Point structure can be located + * by application software by searching for the anchor-string on paragraph + * (16-byte) boundaries within the physical memory address range 000F0000h to + * 000FFFFFh. * - * "On non-EFI systems, the SMBIOS Entry Point structure, described below, can - * be located by application software by searching for the anchor-string on - * paragraph (16-byte) boundaries within the physical memory address range - * 000F0000h to 000FFFFFh. This entry point encapsulates an intermediate anchor - * string that is used by some existing DMI browsers." + * On UEFI-based systems, the SMBIOS Entry Point structure can be located by + * looking in the EFI Configuration Table for the SMBIOS 3.x GUID + * (SMBIOS3_TABLE_GUID, {F2FD1544-9794-4A2C-992E-E5BBCF20E394}) and using the + * associated pointer. See section 4.6 of the UEFI Specification for details. + * See section 2.3 of the UEFI Specification for how to report the containing + * memory type." */ #define SMBIOS_START 0xf0000 #define SMBIOS_LENGTH 0x10000
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?202304180321.33I3LhxW024029>