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/*
* QEMU ICH9 TCO emulation
*
* Copyright (c) 2015 Paulo Alcantara <pcacjr@zytor.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef HW_ACPI_TCO_H
#define HW_ACPI_TCO_H
#include "qemu-common.h"
/* As per ICH9 spec, the internal timer has an error of ~0.6s on every tick */
#define TCO_TICK_NSEC 600000000LL
/* TCO I/O register offsets */
enum {
TCO_RLD = 0x00,
TCO_DAT_IN = 0x02,
TCO_DAT_OUT = 0x03,
TCO1_STS = 0x04,
TCO2_STS = 0x06,
TCO1_CNT = 0x08,
TCO2_CNT = 0x0a,
TCO_MESSAGE1 = 0x0c,
TCO_MESSAGE2 = 0x0d,
TCO_WDCNT = 0x0e,
SW_IRQ_GEN = 0x10,
TCO_TMR = 0x12,
};
/* TCO I/O register control/status bits */
enum {
SW_TCO_SMI = 1 << 1,
TCO_INT_STS = 1 << 2,
TCO_LOCK = 1 << 12,
TCO_TMR_HLT = 1 << 11,
TCO_TIMEOUT = 1 << 3,
TCO_SECOND_TO_STS = 1 << 1,
TCO_BOOT_STS = 1 << 2,
};
/* TCO I/O registers mask bits */
enum {
TCO_RLD_MASK = 0x3ff,
TCO1_STS_MASK = 0xe870,
TCO2_STS_MASK = 0xfff8,
TCO1_CNT_MASK = 0xfeff,
TCO_TMR_MASK = 0x3ff,
};
typedef struct TCOIORegs {
struct {
uint16_t rld;
uint8_t din;
uint8_t dout;
uint16_t sts1;
uint16_t sts2;
uint16_t cnt1;
uint16_t cnt2;
uint8_t msg1;
uint8_t msg2;
uint8_t wdcnt;
uint16_t tmr;
} tco;
uint8_t sw_irq_gen;
QEMUTimer *tco_timer;
int64_t expire_time;
uint8_t timeouts_no;
MemoryRegion io;
} TCOIORegs;
/* tco.c */
void acpi_pm_tco_init(TCOIORegs *tr, MemoryRegion *parent);
extern const VMStateDescription vmstate_tco_io_sts;
#endif /* HW_ACPI_TCO_H */
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