1*ba66f564Sdv /* $OpenBSD: i8259.h,v 1.7 2024/07/09 09:31:37 dv Exp $ */ 2ecc93de1Smlarkin /* 3ecc93de1Smlarkin * Copyright (c) 2016 Mike Larkin <mlarkin@openbsd.org> 4ecc93de1Smlarkin * 5ecc93de1Smlarkin * Permission to use, copy, modify, and distribute this software for any 6ecc93de1Smlarkin * purpose with or without fee is hereby granted, provided that the above 7ecc93de1Smlarkin * copyright notice and this permission notice appear in all copies. 8ecc93de1Smlarkin * 9ecc93de1Smlarkin * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10ecc93de1Smlarkin * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11ecc93de1Smlarkin * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12ecc93de1Smlarkin * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13ecc93de1Smlarkin * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14ecc93de1Smlarkin * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15ecc93de1Smlarkin * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16ecc93de1Smlarkin */ 17ecc93de1Smlarkin 18ecc93de1Smlarkin #include <sys/types.h> 19ecc93de1Smlarkin 20ecc93de1Smlarkin #define MASTER 0 21ecc93de1Smlarkin #define SLAVE 1 22ecc93de1Smlarkin 2333de4f94Sdv #define ELCR0 0x4D0 2433de4f94Sdv #define ELCR1 0x4D1 2533de4f94Sdv 26ecc93de1Smlarkin #define ICW1_ICW4 (0x1 << 0) 27ecc93de1Smlarkin #define ICW1_SNGL (0x1 << 1) 28ecc93de1Smlarkin #define ICW1_ADI (0x1 << 2) 29ecc93de1Smlarkin #define ICW1_LTIM (0x1 << 3) 30ecc93de1Smlarkin #define ICW1_INIT (0x1 << 4) 31ecc93de1Smlarkin #define ICW1_IVA1 (0x1 << 5) 32ecc93de1Smlarkin #define ICW1_IVA2 (0x1 << 6) 33ecc93de1Smlarkin #define ICW1_IVA3 (0x1 << 7) 34ecc93de1Smlarkin #define ICW4_UP (0x1 << 0) 35ecc93de1Smlarkin #define ICW4_AEOI (0x1 << 1) 36ecc93de1Smlarkin #define ICW4_MS (0x1 << 2) 37ecc93de1Smlarkin #define ICW4_BUF (0x1 << 3) 38ecc93de1Smlarkin #define ICW4_SNFM (0x1 << 4) 39ecc93de1Smlarkin 40ecc93de1Smlarkin #define OCW_SELECT (0x1 << 3) 41ecc93de1Smlarkin 42ecc93de1Smlarkin #define OCW2_ROTATE_AEOI_CLEAR 0x00 43ecc93de1Smlarkin #define OCW2_EOI 0x20 44ecc93de1Smlarkin #define OCW2_NOP 0x40 45ecc93de1Smlarkin #define OCW2_SEOI 0x60 46ecc93de1Smlarkin #define OCW2_ROTATE_AEOI_SET 0x80 47ecc93de1Smlarkin #define OCW2_ROTATE_NSEOI 0xA0 48ecc93de1Smlarkin #define OCW2_SET_LOWPRIO 0xC0 49ecc93de1Smlarkin #define OCW2_ROTATE_SEOI 0xE0 50ecc93de1Smlarkin #define OCW3_RIS (0x1 << 0) 51ecc93de1Smlarkin #define OCW3_RR (0x1 << 1) 52ecc93de1Smlarkin #define OCW3_POLL (0x1 << 2) 53ecc93de1Smlarkin #define OCW3_ACTION (0x1 << 3) 54ecc93de1Smlarkin #define OCW3_SMM (0x1 << 5) 55ecc93de1Smlarkin #define OCW3_SMACTION (0x1 << 6) 56ecc93de1Smlarkin 57ecc93de1Smlarkin /* PIC functions called by device emulation code */ 58ecc93de1Smlarkin void i8259_assert_irq(uint8_t); 59ecc93de1Smlarkin void i8259_deassert_irq(uint8_t); 60ecc93de1Smlarkin 61ecc93de1Smlarkin /* PIC functions called by the in/out exit handler */ 62ecc93de1Smlarkin uint8_t vcpu_exit_i8259(struct vm_run_params *); 63ecc93de1Smlarkin 64ecc93de1Smlarkin void i8259_init(void); 65ecc93de1Smlarkin uint16_t i8259_ack(void); 66ecc93de1Smlarkin uint8_t i8259_is_pending(void); 67149417b6Sreyk int i8259_restore(int); 68149417b6Sreyk int i8259_dump(int); 69d326e819Smlarkin 70d326e819Smlarkin /* ELCR functions */ 71d326e819Smlarkin void pic_set_elcr(uint8_t, uint8_t); 72d326e819Smlarkin uint8_t vcpu_exit_elcr(struct vm_run_params *); 73