i8259 Management More...

#include <bsp.h>
#include <bsp/irq.h>

Macros
#define	PIC_EOSI 0x60
	End of Specific Interrupt (EOSI)

#define	PIC_EOI 0x20
	Generic End of Interrupt (EOI)

#define	PIC_OCW3_RIS 0x01 /* 1 = read IS, 0 = read IR */

#define	PIC_OCW3_RR 0x02 /* register read */

#define	PIC_OCW3_P 0x04 /* poll mode command */

#define	PIC_OCW3_SEL 0x08 /* must be 1 */

#define	PIC_OCW3_SMM 0x20 /* special mode mask */

#define	PIC_OCW3_ESMM 0x40 /* enable SMM */

Functions
int	BSP_irq_disable_at_i8259s (const rtems_irq_number irqLine)
	function to disable a particular irq at 8259 level.

int	BSP_irq_enable_at_i8259s (const rtems_irq_number irqLine)
	function to enable a particular irq at 8259 level.

int	BSP_irq_enabled_at_i8259s (const rtems_irq_number irqLine)
	function to check if a particular irq is enabled at 8259 level.

int	BSP_irq_ack_at_i8259s (const rtems_irq_number irqLine)
	function to acknowledge a particular irq at 8259 level.

unsigned short	BSP_irq_suspend_i8259s (unsigned short mask)

void	BSP_irq_resume_i8259s (unsigned short in_progress_save)

void	BSP_i8259s_init (void)

Detailed Description

i8259 Management

This file contains the implementation of the function described in irq.h related to Intel 8259 Programmable Interrupt controller.

Macros