| /* |
| * QEMU 8253/8254 interval timer emulation |
| * |
| * Copyright (c) 2003-2004 Fabrice Bellard |
| * |
| * 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_H |
| #define QEMU_I8254_H |
| |
| #define PIT_SAVEVM_NAME "i8254" |
| #define PIT_SAVEVM_VERSION 2 |
| |
| #define RW_STATE_LSB 1 |
| #define RW_STATE_MSB 2 |
| #define RW_STATE_WORD0 3 |
| #define RW_STATE_WORD1 4 |
| |
| #define PIT_FLAGS_HPET_LEGACY 1 |
| |
| 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; |
| } PITChannelState; |
| |
| struct PITState { |
| PITChannelState channels[3]; |
| uint32_t flags; |
| }; |
| |
| void pit_save(QEMUFile *f, void *opaque); |
| |
| int pit_load(QEMUFile *f, void *opaque, int version_id); |
| |
| void pit_reset(void *opaque); |
| |
| #endif |