include/hw/acpi/tco.h

   1 /*
   2  * QEMU ICH9 TCO emulation
   3  *
   4  * Copyright (c) 2015 Paulo Alcantara <pcacjr@zytor.com>
   5  *
   6  * This work is licensed under the terms of the GNU GPL, version 2 or later.
   7  * See the COPYING file in the top-level directory.
   8  */
   9 #ifndef HW_ACPI_TCO_H
  10 #define HW_ACPI_TCO_H
  11
  12 #include "qemu-common.h"
  13
  14 /* As per ICH9 spec, the internal timer has an error of ~0.6s on every tick */
  15 #define TCO_TICK_NSEC 600000000LL
  16
  17 /* TCO I/O register offsets */
  18 enum {
  19     TCO_RLD           = 0x00,
  20     TCO_DAT_IN        = 0x02,
  21     TCO_DAT_OUT       = 0x03,
  22     TCO1_STS          = 0x04,
  23     TCO2_STS          = 0x06,
  24     TCO1_CNT          = 0x08,
  25     TCO2_CNT          = 0x0a,
  26     TCO_MESSAGE1      = 0x0c,
  27     TCO_MESSAGE2      = 0x0d,
  28     TCO_WDCNT         = 0x0e,
  29     SW_IRQ_GEN        = 0x10,
  30     TCO_TMR           = 0x12,
  31 };
  32
  33 /* TCO I/O register control/status bits */
  34 enum {
  35     SW_TCO_SMI           = 1 << 1,
  36     TCO_INT_STS          = 1 << 2,
  37     TCO_LOCK             = 1 << 12,
  38     TCO_TMR_HLT          = 1 << 11,
  39     TCO_TIMEOUT          = 1 << 3,
  40     TCO_SECOND_TO_STS    = 1 << 1,
  41     TCO_BOOT_STS         = 1 << 2,
  42 };
  43
  44 /* TCO I/O registers mask bits */
  45 enum {
  46     TCO_RLD_MASK     = 0x3ff,
  47     TCO1_STS_MASK    = 0xe870,
  48     TCO2_STS_MASK    = 0xfff8,
  49     TCO1_CNT_MASK    = 0xfeff,
  50     TCO_TMR_MASK     = 0x3ff,
  51 };
  52
  53 typedef struct TCOIORegs {
  54     struct {
  55         uint16_t rld;
  56         uint8_t din;
  57         uint8_t dout;
  58         uint16_t sts1;
  59         uint16_t sts2;
  60         uint16_t cnt1;
  61         uint16_t cnt2;
  62         uint8_t msg1;
  63         uint8_t msg2;
  64         uint8_t wdcnt;
  65         uint16_t tmr;
  66     } tco;
  67     uint8_t sw_irq_gen;
  68
  69     QEMUTimer *tco_timer;
  70     int64_t expire_time;
  71     uint8_t timeouts_no;
  72
  73     MemoryRegion io;
  74 } TCOIORegs;
  75
  76 /* tco.c */
  77 void acpi_pm_tco_init(TCOIORegs *tr, MemoryRegion *parent);
  78
  79 extern const VMStateDescription vmstate_tco_io_sts;
  80
  81 #endif /* HW_ACPI_TCO_H */