mirror of
https://github.com/qemu/qemu.git
synced 2024-12-07 02:33:40 +08:00
d11e859e4a
Applying the concept used for the *PICs once again: establish a base class for the i8254 that can be used both by the current user space emulation and the upcoming KVM in-kernel version. We share most of the public interface of the i8254, specifically to the pcspk, vmstate, reset and certain init parts. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
86 lines
3.0 KiB
C
86 lines
3.0 KiB
C
/*
|
|
* QEMU 8253/8254 - internal interfaces
|
|
*
|
|
* Copyright (c) 2011 Jan Kiszka, Siemens AG
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#ifndef QEMU_I8254_INTERNAL_H
|
|
#define QEMU_I8254_INTERNAL_H
|
|
|
|
#include "hw.h"
|
|
#include "pc.h"
|
|
#include "isa.h"
|
|
|
|
typedef struct PITChannelState {
|
|
int count; /* can be 65536 */
|
|
uint16_t latched_count;
|
|
uint8_t count_latched;
|
|
uint8_t status_latched;
|
|
uint8_t status;
|
|
uint8_t read_state;
|
|
uint8_t write_state;
|
|
uint8_t write_latch;
|
|
uint8_t rw_mode;
|
|
uint8_t mode;
|
|
uint8_t bcd; /* not supported */
|
|
uint8_t gate; /* timer start */
|
|
int64_t count_load_time;
|
|
/* irq handling */
|
|
int64_t next_transition_time;
|
|
QEMUTimer *irq_timer;
|
|
qemu_irq irq;
|
|
uint32_t irq_disabled;
|
|
} PITChannelState;
|
|
|
|
typedef struct PITCommonState {
|
|
ISADevice dev;
|
|
MemoryRegion ioports;
|
|
uint32_t iobase;
|
|
PITChannelState channels[3];
|
|
} PITCommonState;
|
|
|
|
#define TYPE_PIT_COMMON "pit-common"
|
|
#define PIT_COMMON(obj) \
|
|
OBJECT_CHECK(PITCommonState, (obj), TYPE_PIT_COMMON)
|
|
#define PIT_COMMON_CLASS(klass) \
|
|
OBJECT_CLASS_CHECK(PITCommonClass, (klass), TYPE_PIT_COMMON)
|
|
#define PIT_COMMON_GET_CLASS(obj) \
|
|
OBJECT_GET_CLASS(PITCommonClass, (obj), TYPE_PIT_COMMON)
|
|
|
|
typedef struct PITCommonClass {
|
|
ISADeviceClass parent_class;
|
|
|
|
int (*init)(PITCommonState *s);
|
|
void (*set_channel_gate)(PITCommonState *s, PITChannelState *sc, int val);
|
|
void (*get_channel_info)(PITCommonState *s, PITChannelState *sc,
|
|
PITChannelInfo *info);
|
|
void (*pre_save)(PITCommonState *s);
|
|
void (*post_load)(PITCommonState *s);
|
|
} PITCommonClass;
|
|
|
|
int pit_get_out(PITChannelState *s, int64_t current_time);
|
|
int64_t pit_get_next_transition_time(PITChannelState *s, int64_t current_time);
|
|
void pit_get_channel_info_common(PITCommonState *s, PITChannelState *sc,
|
|
PITChannelInfo *info);
|
|
void pit_reset_common(PITCommonState *s);
|
|
|
|
#endif /* !QEMU_I8254_INTERNAL_H */
|