lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Mon, 9 Jul 2007 19:52:03 -0700 From: "H. Peter Anvin" <hpa@...or.com> To: linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org, andi@...stfloor.org, akpm@...ux-foundation.org Cc: "H. Peter Anvin" <hpa@...or.com> Subject: [x86 setup 24/33] MCA support for new x86 setup code From: H. Peter Anvin <hpa@...or.com> MCA probing support for the new x86 setup code. This implements the same functionality as the assembly version. Signed-off-by: H. Peter Anvin <hpa@...or.com> --- arch/i386/boot/mca.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 43 insertions(+), 0 deletions(-) create mode 100644 arch/i386/boot/mca.c diff --git a/arch/i386/boot/mca.c b/arch/i386/boot/mca.c new file mode 100644 index 0000000..9b68bd1 --- /dev/null +++ b/arch/i386/boot/mca.c @@ -0,0 +1,43 @@ +/* -*- linux-c -*- ------------------------------------------------------- * + * + * Copyright (C) 1991, 1992 Linus Torvalds + * Copyright 2007 rPath, Inc. - All Rights Reserved + * + * This file is part of the Linux kernel, and is made available under + * the terms of the GNU General Public License version 2. + * + * ----------------------------------------------------------------------- */ + +/* + * arch/i386/boot/mca.c + * + * Get the MCA system description table + */ + +#include "boot.h" + +int query_mca(void) +{ + u8 err; + u16 es, bx, len; + + asm("pushw %%es ; " + "int $0x15 ; " + "setc %0 ; " + "movw %%es, %1 ; " + "popw %%es" + : "=acdSDm" (err), "=acdSDm" (es), "=b" (bx) + : "a" (0xc000)); + + if (err) + return -1; /* No MCA present */ + + set_fs(es); + len = rdfs16(bx); + + if (len > sizeof(boot_params.sys_desc_table)) + len = sizeof(boot_params.sys_desc_table); + + copy_from_fs(&boot_params.sys_desc_table, bx, len); + return 0; +} -- 1.5.2.2 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists