Messages in this thread Patch in this message | | | Date | Wed, 9 Nov 2005 16:37:34 -0800 | Subject | [PATCH 4/10] Apm seg in gdt | From | Zachary Amsden <> |
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Since APM BIOS segment limits are now fixed, set them in head.S GDT and don't use the complicated _set_limit() macro expansion.
Signed-off-by: Zachary Amsden <zach@vmware.com> Index: linux-2.6.14/arch/i386/kernel/head.S =================================================================== --- linux-2.6.14.orig/arch/i386/kernel/head.S 2005-11-08 05:41:06.000000000 -0800 +++ linux-2.6.14/arch/i386/kernel/head.S 2005-11-08 05:41:19.000000000 -0800 @@ -510,13 +510,14 @@ .quad 0x0080920000000000 /* 0xa0 16-bit data */ .quad 0x0080920000000000 /* 0xa8 16-bit data */ .quad 0x0080920000000000 /* 0xb0 16-bit data */ + /* * The APM segments have byte granularity and their bases - * and limits are set at run time. + * are set at run time. All have 64k limits. */ - .quad 0x00409a0000000000 /* 0xb8 APM CS code */ - .quad 0x00009a0000000000 /* 0xc0 APM CS 16 code (16 bit) */ - .quad 0x0040920000000000 /* 0xc8 APM DS data */ + .quad 0x00409a000000ffff /* 0xb8 APM CS code */ + .quad 0x00009a000000ffff /* 0xc0 APM CS 16 code (16 bit) */ + .quad 0x004092000000ffff /* 0xc8 APM DS data */ .quad 0x0000920000000000 /* 0xd0 - ESPFIX 16-bit SS */ .quad 0x0000000000000000 /* 0xd8 - unused */ Index: linux-2.6.14/arch/i386/kernel/apm.c =================================================================== --- linux-2.6.14.orig/arch/i386/kernel/apm.c 2005-11-08 05:41:14.000000000 -0800 +++ linux-2.6.14/arch/i386/kernel/apm.c 2005-11-08 05:41:19.000000000 -0800 @@ -2306,12 +2306,6 @@ __va((unsigned long)apm_info.bios.cseg_16 << 4)); set_base(gdt[APM_DS >> 3], __va((unsigned long)apm_info.bios.dseg << 4)); - /* For ASUS motherboard, Award BIOS rev 110 (and others?) */ - _set_limit((char *)&gdt[APM_CS >> 3], 64 * 1024 - 1); - /* For some unknown machine. */ - _set_limit((char *)&gdt[APM_CS_16 >> 3], 64 * 1024 - 1); - /* For the DEC Hinote Ultra CT475 (and others?) */ - _set_limit((char *)&gdt[APM_DS >> 3], 64 * 1024 - 1); } apm_proc = create_proc_info_entry("apm", 0, NULL, apm_get_info); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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