RTEMS: bsps/mips/include/bsp/i8259.h File Reference

| RTEMS 5.4-rc2

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i8259.h File Reference
Board Support Packages » MIPS » Shared » i8259 Chip Support

Data structure and functions used to control i8259 chip. More...

Go to the source code of this file.

## Macros
8259 edge/level control definitions at VIA
#define | ISA8259_M_ELCR 0x4d0
#define | ISA8259_S_ELCR 0x4d1
#define | ELCRS_INT15_LVL 0x80
#define | ELCRS_INT14_LVL 0x40
#define | ELCRS_INT13_LVL 0x20
#define | ELCRS_INT12_LVL 0x10
#define | ELCRS_INT11_LVL 0x08
#define | ELCRS_INT10_LVL 0x04
#define | ELCRS_INT9_LVL 0x02
#define | ELCRS_INT8_LVL 0x01
#define | ELCRM_INT7_LVL 0x80
#define | ELCRM_INT6_LVL 0x40
#define | ELCRM_INT5_LVL 0x20
#define | ELCRM_INT4_LVL 0x10
#define | ELCRM_INT3_LVL 0x8
#define | ELCRM_INT2_LVL 0x4
#define | ELCRM_INT1_LVL 0x2
#define | ELCRM_INT0_LVL 0x1
PIC's command and mask registers
#define | PIC_MASTER_COMMAND_IO_PORT 0x20
| Master PIC command register *‍/.
#define | PIC_SLAVE_COMMAND_IO_PORT 0xa0
| Slave PIC command register *‍/.
#define | PIC_MASTER_IMR_IO_PORT 0x21
| Master PIC Interrupt Mask Register *‍/.
#define | PIC_SLAVE_IMR_IO_PORT 0xa1
| Slave PIC Interrupt Mask Register *‍/.
Command for specific EOI (End Of Interrupt): Interrupt acknowledge
#define | PIC_EOSI 0x60
| End of Specific Interrupt (EOSI) *‍/.
#define | SLAVE_PIC_EOSI 0x62
| End of Specific Interrupt (EOSI) for cascade *‍/.
#define | PIC_EOI 0x20
| Generic End of Interrupt (EOI) *‍/.

## Functions
Function Prototypes
void | BSP_i8259s_init (void)
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_ack_at_i8259s (const rtems_irq_number irqLine)
| function to acknowledge 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_i8259s_int_process (void)
void | BSP_rtems_irq_mng_init (unsigned cpuId)

## Type definition for RTEMS managed interrupts
typedef unsigned short | rtems_i8259_masks
volatile rtems_i8259_masks | i8259s_cache

## Detailed Description

Data structure and functions used to control i8259 chip.