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i8259: fix final ugliness 

Introduce IRQx_VECTOR on 32-bit, so that #ifdef noise is kept
down. There should be no object code change.

[ mingo@elte.hu: merged to x86/irq not x86/i8259 due to x86/irq having
  restructured the vector code into asm-x86/irq_vectors.h, which this
  patch touches. ]

Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Pavel Machek 2008-05-28 12:42:57 +02:00 committed by Ingo Molnar
parent ec42418f19
commit c46e62f735
2 changed files with 14 additions and 17 deletions
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22
arch/x86/kernel/i8259.c
View File

@ -297,34 +297,28 @@ void init_8259A(int auto_eoi)
* outb_pic - this has to work on a wide range of PC hardware.
*/
outb_pic(0x11, PIC_MASTER_CMD); /* ICW1: select 8259A-1 init */
#ifndef CONFIG_X86_64
outb_pic(0x20 + 0, PIC_MASTER_IMR); /* ICW2: 8259A-1 IR0-7 mapped to 0x20-0x27 */
outb_pic(1U << PIC_CASCADE_IR, PIC_MASTER_IMR); /* 8259A-1 (the master) has a slave on IR2 */
#else /* CONFIG_X86_64 */
/* ICW2: 8259A-1 IR0-7 mapped to 0x30-0x37 */
/* ICW2: 8259A-1 IR0-7 mapped to 0x30-0x37 on x86-64,
to 0x20-0x27 on i386 */
outb_pic(IRQ0_VECTOR, PIC_MASTER_IMR);
/* 8259A-1 (the master) has a slave on IR2 */
outb_pic(0x04, PIC_MASTER_IMR);
#endif /* CONFIG_X86_64 */
outb_pic(1U << PIC_CASCADE_IR, PIC_MASTER_IMR);
if (auto_eoi) /* master does Auto EOI */
outb_pic(MASTER_ICW4_DEFAULT | PIC_ICW4_AEOI, PIC_MASTER_IMR);
else /* master expects normal EOI */
outb_pic(MASTER_ICW4_DEFAULT, PIC_MASTER_IMR);
outb_pic(0x11, PIC_SLAVE_CMD); /* ICW1: select 8259A-2 init */
#ifndef CONFIG_X86_64
outb_pic(0x20 + 8, PIC_SLAVE_IMR); /* ICW2: 8259A-2 IR0-7 mapped to 0x28-0x2f */
outb_pic(PIC_CASCADE_IR, PIC_SLAVE_IMR); /* 8259A-2 is a slave on master's IR2 */
outb_pic(SLAVE_ICW4_DEFAULT, PIC_SLAVE_IMR); /* (slave's support for AEOI in flat mode is to be investigated) */
#else /* CONFIG_X86_64 */
/* ICW2: 8259A-2 IR0-7 mapped to 0x38-0x3f */
/* ICW2: 8259A-2 IR0-7 mapped to IRQ8_VECTOR */
outb_pic(IRQ8_VECTOR, PIC_SLAVE_IMR);
/* 8259A-2 is a slave on master's IR2 */
outb_pic(PIC_CASCADE_IR, PIC_SLAVE_IMR);
/* (slave's support for AEOI in flat mode is to be investigated) */
outb_pic(SLAVE_ICW4_DEFAULT, PIC_SLAVE_IMR);
#endif /* CONFIG_X86_64 */
if (auto_eoi)
/*
* In AEOI mode we just have to mask the interrupt

9
include/asm-x86/irq_vectors.h
View File

@ -18,17 +18,20 @@
#endif
/*
* Vectors 0x20-0x2f are used for ISA interrupts on 32 bit.
*
* Reserve the lowest usable priority level 0x20 - 0x2f for triggering
* cleanup after irq migration on 64 bit.
*/
#define IRQ_MOVE_CLEANUP_VECTOR FIRST_EXTERNAL_VECTOR
/*
* Vectors 0x30-0x3f are used for ISA interrupts on 64 bit
* Vectors 0x20-0x2f are used for ISA interrupts on 32 bit.
* Vectors 0x30-0x3f are used for ISA interrupts on 64 bit.
*/
#ifdef CONFIG_X86_32
#define IRQ0_VECTOR (FIRST_EXTERNAL_VECTOR)
#else
#define IRQ0_VECTOR (FIRST_EXTERNAL_VECTOR + 0x10)
#endif
#define IRQ1_VECTOR (IRQ0_VECTOR + 1)
#define IRQ2_VECTOR (IRQ0_VECTOR + 2)
#define IRQ3_VECTOR (IRQ0_VECTOR + 3)