xref: /openbmc/qemu/include/hw/acpi/ich9_tco.h (revision 06680402)
1 /*
2  * QEMU ICH9 TCO emulation (total cost of ownership)
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 
10 #ifndef HW_ACPI_TCO_H
11 #define HW_ACPI_TCO_H
12 
13 #include "exec/memory.h"
14 #include "migration/vmstate.h"
15 
16 /* As per ICH9 spec, the internal timer has an error of ~0.6s on every tick */
17 #define TCO_TICK_NSEC 600000000LL
18 
19 /* TCO I/O register offsets */
20 enum {
21     TCO_RLD           = 0x00,
22     TCO_DAT_IN        = 0x02,
23     TCO_DAT_OUT       = 0x03,
24     TCO1_STS          = 0x04,
25     TCO2_STS          = 0x06,
26     TCO1_CNT          = 0x08,
27     TCO2_CNT          = 0x0a,
28     TCO_MESSAGE1      = 0x0c,
29     TCO_MESSAGE2      = 0x0d,
30     TCO_WDCNT         = 0x0e,
31     SW_IRQ_GEN        = 0x10,
32     TCO_TMR           = 0x12,
33 };
34 
35 /* TCO I/O register control/status bits */
36 enum {
37     SW_TCO_SMI           = 1 << 1,
38     TCO_INT_STS          = 1 << 2,
39     TCO_LOCK             = 1 << 12,
40     TCO_TMR_HLT          = 1 << 11,
41     TCO_TIMEOUT          = 1 << 3,
42     TCO_SECOND_TO_STS    = 1 << 1,
43     TCO_BOOT_STS         = 1 << 2,
44 };
45 
46 /* TCO I/O registers mask bits */
47 enum {
48     TCO_RLD_MASK     = 0x3ff,
49     TCO1_STS_MASK    = 0xe870,
50     TCO2_STS_MASK    = 0xfff8,
51     TCO1_CNT_MASK    = 0xfeff,
52     TCO_TMR_MASK     = 0x3ff,
53 };
54 
55 typedef struct TCOIORegs {
56     struct {
57         uint16_t rld;
58         uint8_t din;
59         uint8_t dout;
60         uint16_t sts1;
61         uint16_t sts2;
62         uint16_t cnt1;
63         uint16_t cnt2;
64         uint8_t msg1;
65         uint8_t msg2;
66         uint8_t wdcnt;
67         uint16_t tmr;
68     } tco;
69     uint8_t sw_irq_gen;
70 
71     QEMUTimer *tco_timer;
72     int64_t expire_time;
73     uint8_t timeouts_no;
74 
75     MemoryRegion io;
76 } TCOIORegs;
77 
78 /* tco.c */
79 void acpi_pm_tco_init(TCOIORegs *tr, MemoryRegion *parent);
80 
81 extern const VMStateDescription vmstate_tco_io_sts;
82 
83 #endif /* HW_ACPI_TCO_H */
84