/* 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 */