/* $OpenBSD: i8259.h,v 1.5 2022/09/01 22:01:40 dv Exp $ */ /* * Copyright (c) 2016 Mike Larkin * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include #include #define MASTER 0 #define SLAVE 1 #define ELCR0 0x4D0 #define ELCR1 0x4D1 #define ICW1_ICW4 (0x1 << 0) #define ICW1_SNGL (0x1 << 1) #define ICW1_ADI (0x1 << 2) #define ICW1_LTIM (0x1 << 3) #define ICW1_INIT (0x1 << 4) #define ICW1_IVA1 (0x1 << 5) #define ICW1_IVA2 (0x1 << 6) #define ICW1_IVA3 (0x1 << 7) #define ICW4_UP (0x1 << 0) #define ICW4_AEOI (0x1 << 1) #define ICW4_MS (0x1 << 2) #define ICW4_BUF (0x1 << 3) #define ICW4_SNFM (0x1 << 4) #define OCW_SELECT (0x1 << 3) #define OCW2_ROTATE_AEOI_CLEAR 0x00 #define OCW2_EOI 0x20 #define OCW2_NOP 0x40 #define OCW2_SEOI 0x60 #define OCW2_ROTATE_AEOI_SET 0x80 #define OCW2_ROTATE_NSEOI 0xA0 #define OCW2_SET_LOWPRIO 0xC0 #define OCW2_ROTATE_SEOI 0xE0 #define OCW3_RIS (0x1 << 0) #define OCW3_RR (0x1 << 1) #define OCW3_POLL (0x1 << 2) #define OCW3_ACTION (0x1 << 3) #define OCW3_SMM (0x1 << 5) #define OCW3_SMACTION (0x1 << 6) /* PIC functions called by device emulation code */ void i8259_assert_irq(uint8_t); void i8259_deassert_irq(uint8_t); /* PIC functions called by vcpu run loop code */ int i8259_get_next_irq(uint8_t *); /* PIC functions called by the in/out exit handler */ uint8_t vcpu_exit_i8259(struct vm_run_params *); void i8259_init(void); uint16_t i8259_ack(void); uint8_t i8259_is_pending(void); int i8259_restore(int); int i8259_dump(int); /* ELCR functions */ void pic_set_elcr(uint8_t, uint8_t); uint8_t vcpu_exit_elcr(struct vm_run_params *);