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x86, setup: "glove box" BIOS calls -- infrastructure

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Impact: new interfaces (not yet used)

For all the platforms out there, there is an infinite number of buggy
BIOSes.  This adds infrastructure to treat BIOS interrupts more like
toxic waste and "glove box" them -- we switch out the register set,
perform the BIOS interrupt, and then restore the previous state.

LKML-Reference: <49DE7F79.4030106@zytor.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
This commit is contained in:
H. Peter Anvin
2009-04-01 18:08:28 -07:00
committed by H. Peter Anvin
parent 62b8e680e6
commit 7a734e7dd9
9 changed files with 172 additions and 4 deletions
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arch/x86/boot/header.S
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@ -221,7 +221,7 @@ setup_data: .quad 0 # 64-bit physical pointer to
# End of setup header #####################################################
.section ".inittext", "ax"
.section ".entrytext", "ax"
start_of_setup:
#ifdef SAFE_RESET_DISK_CONTROLLER
# Reset the disk controller.