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authorZachary Amsden <zach@vmware.com>2006-01-06 11:11:53 +0300
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-06 19:33:35 +0300
commit99022c4695d3f45fcf7f3827aa46dd2d9e53e365 (patch)
treeda02b2dc37e33a2fbaf8eb752d9f5b2f70222d96 /arch
parent3012d2d209580c78b5927d55c60a10891be8befd (diff)
downloadlinux-99022c4695d3f45fcf7f3827aa46dd2d9e53e365.tar.xz
[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 <zach@vmware.com> Acked-by: "Seth, Rohit" <rohit.seth@intel.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/i386/kernel/apm.c6
-rw-r--r--arch/i386/kernel/head.S9
2 files changed, 5 insertions, 10 deletions
diff --git a/arch/i386/kernel/apm.c b/arch/i386/kernel/apm.c
index 0d2981120cd6..45199bb6455b 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 870f20bf33c8..37b599fa4d18 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 */