| /* SPDX-License-Identifier: GPL-2.0+ */ |
| /* |
| * (C) Copyright 2002 |
| * Daniel Engström, Omicron Ceti AB, daniel@omicron.se. |
| */ |
| |
| /* i8259.h i8259 PIC Registers */ |
| |
| #ifndef _ASMI386_I8259_H_ |
| #define _ASMI386_I8959_H_ |
| |
| /* PIC I/O mapped registers */ |
| #define IRR 0x0 /* Interrupt Request Register */ |
| #define ISR 0x0 /* In-Service Register */ |
| #define ICW1 0x0 /* Initialization Control Word 1 */ |
| #define OCW2 0x0 /* Operation Control Word 2 */ |
| #define OCW3 0x0 /* Operation Control Word 3 */ |
| #define ICW2 0x1 /* Initialization Control Word 2 */ |
| #define ICW3 0x1 /* Initialization Control Word 3 */ |
| #define ICW4 0x1 /* Initialization Control Word 4 */ |
| #define IMR 0x1 /* Interrupt Mask Register */ |
| |
| /* IRR, IMR, ISR and ICW3 bits */ |
| #define IR7 0x80 /* IR7 */ |
| #define IR6 0x40 /* IR6 */ |
| #define IR5 0x20 /* IR5 */ |
| #define IR4 0x10 /* IR4 */ |
| #define IR3 0x08 /* IR3 */ |
| #define IR2 0x04 /* IR2 */ |
| #define IR1 0x02 /* IR1 */ |
| #define IR0 0x01 /* IR0 */ |
| |
| /* SEOI bits */ |
| #define SEOI_IR7 0x07 /* IR7 */ |
| #define SEOI_IR6 0x06 /* IR6 */ |
| #define SEOI_IR5 0x05 /* IR5 */ |
| #define SEOI_IR4 0x04 /* IR4 */ |
| #define SEOI_IR3 0x03 /* IR3 */ |
| #define SEOI_IR2 0x02 /* IR2 */ |
| #define SEOI_IR1 0x01 /* IR1 */ |
| #define SEOI_IR0 0x00 /* IR0 */ |
| |
| /* OCW2 bits */ |
| #define OCW2_RCLR 0x00 /* Rotate/clear */ |
| #define OCW2_NEOI 0x20 /* Non specific EOI */ |
| #define OCW2_NOP 0x40 /* NOP */ |
| #define OCW2_SEOI 0x60 /* Specific EOI */ |
| #define OCW2_RSET 0x80 /* Rotate/set */ |
| #define OCW2_REOI 0xa0 /* Rotate on non specific EOI */ |
| #define OCW2_PSET 0xc0 /* Priority Set Command */ |
| #define OCW2_RSEOI 0xe0 /* Rotate on specific EOI */ |
| |
| /* ICW1 bits */ |
| #define ICW1_SEL 0x10 /* Select ICW1 */ |
| #define ICW1_LTIM 0x08 /* Level-Triggered Interrupt Mode */ |
| #define ICW1_ADI 0x04 /* Address Interval */ |
| #define ICW1_SNGL 0x02 /* Single PIC */ |
| #define ICW1_EICW4 0x01 /* Expect initilization ICW4 */ |
| |
| /* |
| * ICW2 is the starting vector number |
| * |
| * ICW2 is bit-mask of present slaves for a master device, |
| * or the slave ID for a slave device |
| */ |
| |
| /* ICW4 bits */ |
| #define ICW4_AEOI 0x02 /* Automatic EOI Mode */ |
| #define ICW4_PM 0x01 /* Microprocessor Mode */ |
| |
| #define ELCR1 0x4d0 |
| #define ELCR2 0x4d1 |
| |
| int i8259_init(void); |
| |
| #endif /* _ASMI386_I8959_H_ */ |
