1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 3 #ifndef PC80_I8259_H 4 #define PC80_I8259_H 5 6 #include <stdint.h> 7 8 /* 9 * IRQ numbers and common usage 10 * If an IRQ does not say it is 'Reserved' 11 * then it can be used by a device, though 12 * some systems may not adhere to this map. 13 */ 14 /* PIC IRQs */ 15 #define IRQ_DIS 0x1F /* IRQ is disabled */ 16 #define IRQ_0 0x00 /* Reserved - Timer IRQ */ 17 #define IRQ_1 0x01 /* Keyboard controller */ 18 #define IRQ_2 0x02 /* Reserved - Cascade to Slave PIC */ 19 #define IRQ_3 0x03 /* Serial Port 2 & 4 */ 20 #define IRQ_4 0x04 /* Serial Port 1 & 3 */ 21 #define IRQ_5 0x05 /* Parallel Port 2 & 3 or Sound Card */ 22 #define IRQ_6 0x06 /* Floppy Disk Controller */ 23 #define IRQ_7 0x07 /* Parallel Port 1 */ 24 #define IRQ_8 0x08 /* Reserved - RTC */ 25 #define IRQ_9 0x09 /* Reserved - ACPI System Control Interrupt */ 26 #define IRQ_10 0x0A /* Free or SCSI or NIC */ 27 #define IRQ_11 0x0B /* Free or SCSI or NIC */ 28 #define IRQ_12 0x0C /* PS/2 Mouse */ 29 #define IRQ_13 0x0D /* Reserved - CPU Floating Point Unit */ 30 #define IRQ_14 0x0E /* Primary ATA */ 31 #define IRQ_15 0x0F /* Secondary ATA */ 32 33 #define MASTER_PIC_ICW1 0x20 34 #define SLAVE_PIC_ICW1 0xa0 35 #define ICW_SELECT (1 << 4) 36 #define OCW_SELECT (0 << 4) 37 #define ADI (1 << 2) 38 #define SNGL (1 << 1) 39 #define IC4 (1 << 0) 40 41 #define MASTER_PIC_ICW2 0x21 42 #define SLAVE_PIC_ICW2 0xa1 43 #define INT_VECTOR_MASTER 0x20 44 #define IRQ0 0x00 45 #define IRQ1 0x01 46 #define INT_VECTOR_SLAVE 0x28 47 #define IRQ8 0x00 48 #define IRQ9 0x01 49 50 #define MASTER_PIC_ICW3 0x21 51 #define CASCADED_PIC (1 << 2) 52 53 #define MASTER_PIC_ICW4 0x21 54 #define SLAVE_PIC_ICW4 0xa1 55 #define MICROPROCESSOR_MODE (1 << 0) 56 57 #define SLAVE_PIC_ICW3 0xa1 58 #define SLAVE_ID 0x02 59 60 #define MASTER_PIC_OCW1 0x21 61 #define SLAVE_PIC_OCW1 0xa1 62 #define IRQ2 (1 << 2) 63 #define ALL_IRQS 0xff 64 65 #define ELCR1 0x4d0 66 #define ELCR2 0x4d1 67 68 #define IRQ_LEVEL_TRIGGERED 1 69 #define IRQ_EDGE_TRIGGERED 0 70 71 u16 pic_read_irq_mask(void); 72 void pic_write_irq_mask(u16 mask); 73 void pic_irq_enable(u8 int_num, u8 mask); 74 void setup_i8259(void); 75 void i8259_configure_irq_trigger(int int_num, int is_level_triggered); 76 77 #endif /* PC80_I8259_H */ 78