From: Zachary Amsden Date: Fri, 6 Jan 2006 08:11:53 +0000 (-0800) Subject: [PATCH] x86: Apm seg in gdt X-Git-Tag: v2.6.16-rc1~936^2~204 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=99022c4695d3f45fcf7f3827aa46dd2d9e53e365;p=linux-2.6 [PATCH] x86: Apm seg in gdt 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 Acked-by: "Seth, Rohit" Cc: Stephen Rothwell Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/arch/i386/kernel/apm.c b/arch/i386/kernel/apm.c index 0d2981120c..45199bb645 100644 --- a/arch/i386/kernel/apm.c +++ b/arch/i386/kernel/apm.c @@ -2325,12 +2325,6 @@ static int __init apm_init(void) __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); diff --git a/arch/i386/kernel/head.S b/arch/i386/kernel/head.S index 870f20bf33..37b599fa4d 100644 --- a/arch/i386/kernel/head.S +++ b/arch/i386/kernel/head.S @@ -510,13 +510,14 @@ ENTRY(cpu_gdt_table) .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 */