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[PATCH] x86: Fixed pnp bios limits

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PnP BIOS data, code, and 32-bit entry segments all have fixed limits as well;
set them in the GDT rather than adding more code.  It would be nice to add
these fixups to the boot GDT rather than setting the GDT for each CPU; perhaps
I can wiggle this in later, but getting it in before the subsys init looks
tricky.

Also, make some progress on deprecating the ugly Q_SET_SEL macros.

Signed-off-by: Zachary Amsden <zach@vmware.com>
Cc: "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>
This commit is contained in:
Zachary Amsden
2006-01-06 00:11:56 -08:00
committed by Linus Torvalds
parent 5fe9fe3c6f
commit e6a9918c96
2 changed files with 12 additions and 15 deletions
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12
arch/i386/kernel/head.S
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@ -504,10 +504,14 @@ ENTRY(cpu_gdt_table)
.quad 0x0000000000000000 /* 0x80 TSS descriptor */
.quad 0x0000000000000000 /* 0x88 LDT descriptor */
/* Segments used for calling PnP BIOS have byte granularity */
.quad 0x00409a0000000000 /* 0x90 32-bit code */
.quad 0x00009a0000000000 /* 0x98 16-bit code */
.quad 0x0000920000000000 /* 0xa0 16-bit data */
/*
* Segments used for calling PnP BIOS have byte granularity.
* They code segments and data segments have fixed 64k limits,
* the transfer segment sizes are set at run time.
*/
.quad 0x00409a000000ffff /* 0x90 32-bit code */
.quad 0x00009a000000ffff /* 0x98 16-bit code */
.quad 0x000092000000ffff /* 0xa0 16-bit data */
.quad 0x0000920000000000 /* 0xa8 16-bit data */
.quad 0x0000920000000000 /* 0xb0 16-bit data */