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/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef PC80_I8259_H
#define PC80_I8259_H
#include <stdint.h>
/*
* IRQ numbers and common usage
* If an IRQ does not say it is 'Reserved'
* then it can be used by a device, though
* some systems may not adhere to this map.
*/
/* PIC IRQs */
#define IRQ_DIS 0x1F /* IRQ is disabled */
#define IRQ_0 0x00 /* Reserved - Timer IRQ */
#define IRQ_1 0x01 /* Keyboard controller */
#define IRQ_2 0x02 /* Reserved - Cascade to Slave PIC */
#define IRQ_3 0x03 /* Serial Port 2 & 4 */
#define IRQ_4 0x04 /* Serial Port 1 & 3 */
#define IRQ_5 0x05 /* Parallel Port 2 & 3 or Sound Card */
#define IRQ_6 0x06 /* Floppy Disk Controller */
#define IRQ_7 0x07 /* Parallel Port 1 */
#define IRQ_8 0x08 /* Reserved - RTC */
#define IRQ_9 0x09 /* Reserved - ACPI System Control Interrupt */
#define IRQ_10 0x0A /* Free or SCSI or NIC */
#define IRQ_11 0x0B /* Free or SCSI or NIC */
#define IRQ_12 0x0C /* PS/2 Mouse */
#define IRQ_13 0x0D /* Reserved - CPU Floating Point Unit */
#define IRQ_14 0x0E /* Primary ATA */
#define IRQ_15 0x0F /* Secondary ATA */
#define MASTER_PIC_ICW1 0x20
#define SLAVE_PIC_ICW1 0xa0
#define ICW_SELECT (1 << 4)
#define OCW_SELECT (0 << 4)
#define ADI (1 << 2)
#define SNGL (1 << 1)
#define IC4 (1 << 0)
#define MASTER_PIC_ICW2 0x21
#define SLAVE_PIC_ICW2 0xa1
#define INT_VECTOR_MASTER 0x20
#define IRQ0 0x00
#define IRQ1 0x01
#define INT_VECTOR_SLAVE 0x28
#define IRQ8 0x00
#define IRQ9 0x01
#define MASTER_PIC_ICW3 0x21
#define CASCADED_PIC (1 << 2)
#define MASTER_PIC_ICW4 0x21
#define SLAVE_PIC_ICW4 0xa1
#define MICROPROCESSOR_MODE (1 << 0)
#define SLAVE_PIC_ICW3 0xa1
#define SLAVE_ID 0x02
#define MASTER_PIC_OCW1 0x21
#define SLAVE_PIC_OCW1 0xa1
#define IRQ2 (1 << 2)
#define ALL_IRQS 0xff
#define ELCR1 0x4d0
#define ELCR2 0x4d1
#define IRQ_LEVEL_TRIGGERED 1
#define IRQ_EDGE_TRIGGERED 0
u16 pic_read_irq_mask(void);
void pic_write_irq_mask(u16 mask);
void pic_irq_enable(u8 int_num, u8 mask);
void setup_i8259(void);
void i8259_configure_irq_trigger(int int_num, int is_level_triggered);
#endif /* PC80_I8259_H */
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