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/* $OpenBSD: i8259.h,v 1.5 2022/09/01 22:01:40 dv Exp $ */
/*
* Copyright (c) 2016 Mike Larkin <mlarkin@openbsd.org>
*
* 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 <sys/types.h>
#include <machine/vmmvar.h>
#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 *);
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