mirror of
https://github.com/fail0verflow/switch-coreboot.git
synced 2025-05-04 01:39:18 -04:00
71ccb36afc
- Everything in include/cpu/generic/x86/arch/* goes into include/arch/x86 now. - include/cpu/generic/x86/div64.h moves into include/arch/x86, too. - The former include/cpu/generic/x86/arch/elf.h moved to include/arch/x86/archelf.h, as elf.h already exists in include/ and we must prevent a name clash. Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de> Acked-by: Stefan Reinauer <stepan@coresystems.de> git-svn-id: svn://coreboot.org/repository/LinuxBIOSv3@314 f3766cd6-281f-0410-b1cd-43a5c92072e9
38 lines
1.3 KiB
C
38 lines
1.3 KiB
C
/*
|
|
* This file is part of the LinuxBIOS project.
|
|
*
|
|
* It is based on the arch/i386/boot/setup.S file from the Linux kernel.
|
|
*/
|
|
|
|
/*
|
|
! setup.S Copyright (C) 1991, 1992 Linus Torvalds
|
|
!
|
|
! some changes and additional features by Christoph Niemann,
|
|
! March 1993/June 1994 (Christoph.Niemann@linux.org)
|
|
*/
|
|
|
|
#include <io.h>
|
|
|
|
/*
|
|
! well, that went ok, I hope. Now we have to reprogram the interrupts :-(
|
|
! we put them right after the intel-reserved hardware interrupts, at
|
|
! int 0x20-0x2F. There they won't mess up anything. Sadly IBM really
|
|
! messed this up with the original PC, and they haven't been able to
|
|
! rectify it afterwards. Thus the bios puts interrupts at 0x08-0x0f,
|
|
! which is used for the internal hardware interrupts as well. We just
|
|
! have to reprogram the 8259's, and it isn't fun.
|
|
*/
|
|
void setup_i8259(void)
|
|
{
|
|
outb(0x11, 0x20); /* Initialization sequence (8259A-1). */
|
|
outb(0x11, 0xA0); /* Initialization sequence (8259A-2). */
|
|
outb(0x20, 0x21); /* Start of hardware INTs (0x20). */
|
|
outb(0x28, 0xA1); /* Start of hardware INTs 2 (0x28). */
|
|
outb(0x04, 0x21); /* 8259-1 is master. */
|
|
outb(0x02, 0xA1); /* 8259-2 is slave. */
|
|
outb(0x01, 0x21); /* 8086 mode for both. */
|
|
outb(0x01, 0xA1);
|
|
outb(0xFF, 0xA1); /* Mask off all interrupts for now. */
|
|
outb(0xFB, 0x21); /* Mask all IRQs but IRQ2 which is cascaded. */
|
|
}
|
|
|