| wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2002 |
| Albert ARIBAUD | 60fbc8d | 2011-08-04 18:45:45 +0200 | [diff] [blame] | 3 | * Daniel Engström, Omicron Ceti AB, daniel@omicron.se. |
| wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 4 | * |
| Wolfgang Denk | d79de1d | 2013-07-08 09:37:19 +0200 | [diff] [blame] | 5 | * SPDX-License-Identifier: GPL-2.0+ |
| wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 6 | */ |
| 7 | |
| 8 | /* i8259.h i8259 PIC Registers */ |
| 9 | |
| 10 | #ifndef _ASMI386_I8259_H_ |
| 11 | #define _ASMI386_I8959_H_ 1 |
| 12 | |
| 13 | |
| 14 | /* PIC I/O mapped registers */ |
| 15 | |
| 16 | #define IRR 0x0 /* Interrupt Request Register */ |
| 17 | #define ISR 0x0 /* In-Service Register */ |
| 18 | #define ICW1 0x0 /* Initialization Control Word 1 */ |
| 19 | #define OCW2 0x0 /* Operation Control Word 2 */ |
| 20 | #define OCW3 0x0 /* Operation Control Word 3 */ |
| 21 | #define ICW2 0x1 /* Initialization Control Word 2 */ |
| 22 | #define ICW3 0x1 /* Initialization Control Word 3 */ |
| 23 | #define ICW4 0x1 /* Initialization Control Word 4 */ |
| 24 | #define IMR 0x1 /* Interrupt Mask Register */ |
| 25 | |
| 26 | /* bits for IRR, IMR, ISR and ICW3 */ |
| 27 | #define IR7 0x80 /* IR7 */ |
| 28 | #define IR6 0x40 /* IR6 */ |
| 29 | #define IR5 0x20 /* IR5 */ |
| 30 | #define IR4 0x10 /* IR4 */ |
| 31 | #define IR3 0x08 /* IR3 */ |
| 32 | #define IR2 0x04 /* IR2 */ |
| 33 | #define IR1 0x02 /* IR1 */ |
| 34 | #define IR0 0x01 /* IR0 */ |
| 35 | |
| 36 | /* bits for SEOI */ |
| 37 | #define SEOI_IR7 0x07 /* IR7 */ |
| 38 | #define SEOI_IR6 0x06 /* IR6 */ |
| 39 | #define SEOI_IR5 0x05 /* IR5 */ |
| 40 | #define SEOI_IR4 0x04 /* IR4 */ |
| 41 | #define SEOI_IR3 0x03 /* IR3 */ |
| 42 | #define SEOI_IR2 0x02 /* IR2 */ |
| 43 | #define SEOI_IR1 0x01 /* IR1 */ |
| 44 | #define SEOI_IR0 0x00 /* IR0 */ |
| 45 | |
| 46 | /* OCW2 bits */ |
| 47 | #define OCW2_RCLR 0x00 /* Rotate/clear */ |
| 48 | #define OCW2_NEOI 0x20 /* Non specific EOI */ |
| 49 | #define OCW2_NOP 0x40 /* NOP */ |
| 50 | #define OCW2_SEOI 0x60 /* Specific EOI */ |
| 51 | #define OCW2_RSET 0x80 /* Rotate/set */ |
| 52 | #define OCW2_REOI 0xA0 /* Rotate on non specific EOI */ |
| 53 | #define OCW2_PSET 0xC0 /* Priority Set Command */ |
| 54 | #define OCW2_RSEOI 0xE0 /* Rotate on specific EOI */ |
| 55 | |
| 56 | /* ICW1 bits */ |
| 57 | #define ICW1_SEL 0x10 /* Select ICW1 */ |
| 58 | #define ICW1_LTIM 0x08 /* Level-Triggered Interrupt Mode */ |
| 59 | #define ICW1_ADI 0x04 /* Address Interval */ |
| 60 | #define ICW1_SNGL 0x02 /* Single PIC */ |
| 61 | #define ICW1_EICW4 0x01 /* Expect initilization ICW4 */ |
| 62 | |
| 63 | /* ICW2 is the starting vector number */ |
| 64 | |
| wdenk | 57b2d80 | 2003-06-27 21:31:46 +0000 | [diff] [blame] | 65 | /* ICW2 is bit-mask of present slaves for a master device, |
| wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 66 | * or the slave ID for a slave device */ |
| 67 | |
| 68 | /* ICW4 bits */ |
| 69 | #define ICW4_AEOI 0x02 /* Automatic EOI Mode */ |
| 70 | #define ICW4_PM 0x01 /* Microprocessor Mode */ |
| 71 | |
| Bin Meng | cb9d9cb | 2014-11-20 16:11:16 +0800 | [diff] [blame] | 72 | int i8259_init(void); |
| 73 | |
| wdenk | 591dda5 | 2002-11-18 00:14:45 +0000 | [diff] [blame] | 74 | #endif |