include/hw/timer/hpet.h

   1 /*
   2  * QEMU Emulated HPET support
   3  *
   4  * Copyright IBM, Corp. 2008
   5  *
   6  * Authors:
   7  *  Beth Kon   <bkon@us.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2.  See
  10  * the COPYING file in the top-level directory.
  11  *
  12  */
  13 #ifndef QEMU_HPET_EMUL_H
  14 #define QEMU_HPET_EMUL_H
  15
  16 #include "qom/object.h"
  17
  18 #define HPET_BASE               0xfed00000
  19 #define HPET_LEN                0x400
  20 #define HPET_CLK_PERIOD         10 /* 10 ns*/
  21
  22 #define FS_PER_NS 1000000       /* 1000000 femtoseconds == 1 ns */
  23 #define HPET_MIN_TIMERS         3
  24 #define HPET_MAX_TIMERS         32
  25
  26 #define HPET_NUM_IRQ_ROUTES     32
  27
  28 #define HPET_LEGACY_PIT_INT     0
  29 #define HPET_LEGACY_RTC_INT     1
  30
  31 #define HPET_CFG_ENABLE 0x001
  32 #define HPET_CFG_LEGACY 0x002
  33
  34 #define HPET_ID         0x000
  35 #define HPET_PERIOD     0x004
  36 #define HPET_CFG        0x010
  37 #define HPET_STATUS     0x020
  38 #define HPET_COUNTER    0x0f0
  39 #define HPET_TN_CFG     0x000
  40 #define HPET_TN_CMP     0x008
  41 #define HPET_TN_ROUTE   0x010
  42 #define HPET_CFG_WRITE_MASK  0x3
  43
  44 #define HPET_ID_NUM_TIM_SHIFT   8
  45 #define HPET_ID_NUM_TIM_MASK    0x1f00
  46
  47 #define HPET_TN_TYPE_LEVEL       0x002
  48 #define HPET_TN_ENABLE           0x004
  49 #define HPET_TN_PERIODIC         0x008
  50 #define HPET_TN_PERIODIC_CAP     0x010
  51 #define HPET_TN_SIZE_CAP         0x020
  52 #define HPET_TN_SETVAL           0x040
  53 #define HPET_TN_32BIT            0x100
  54 #define HPET_TN_INT_ROUTE_MASK  0x3e00
  55 #define HPET_TN_FSB_ENABLE      0x4000
  56 #define HPET_TN_FSB_CAP         0x8000
  57 #define HPET_TN_CFG_WRITE_MASK  0x7f4e
  58 #define HPET_TN_INT_ROUTE_SHIFT      9
  59 #define HPET_TN_INT_ROUTE_CAP_SHIFT 32
  60 #define HPET_TN_CFG_BITS_READONLY_OR_RESERVED 0xffff80b1U
  61
  62 struct hpet_fw_entry
  63 {
  64     uint32_t event_timer_block_id;
  65     uint64_t address;
  66     uint16_t min_tick;
  67     uint8_t page_prot;
  68 } QEMU_PACKED;
  69
  70 struct hpet_fw_config
  71 {
  72     uint8_t count;
  73     struct hpet_fw_entry hpet[8];
  74 } QEMU_PACKED;
  75
  76 extern struct hpet_fw_config hpet_cfg;
  77
  78 #define TYPE_HPET "hpet"
  79
  80 static inline bool hpet_find(void)
  81 {
  82     return object_resolve_path_type("", TYPE_HPET, NULL);
  83 }
  84
  85 #endif