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
  14 #ifndef HW_HPET_H
  15 #define HW_HPET_H
  16
  17 #include "qom/object.h"
  18
  19 #define HPET_BASE               0xfed00000
  20 #define HPET_LEN                0x400
  21 #define HPET_CLK_PERIOD         10 /* 10 ns*/
  22
  23 #define FS_PER_NS 1000000       /* 1000000 femtoseconds == 1 ns */
  24 #define HPET_MIN_TIMERS         3
  25 #define HPET_MAX_TIMERS         32
  26
  27 #define HPET_NUM_IRQ_ROUTES     32
  28
  29 #define HPET_LEGACY_PIT_INT     0
  30 #define HPET_LEGACY_RTC_INT     1
  31
  32 #define HPET_CFG_ENABLE 0x001
  33 #define HPET_CFG_LEGACY 0x002
  34
  35 #define HPET_ID         0x000
  36 #define HPET_PERIOD     0x004
  37 #define HPET_CFG        0x010
  38 #define HPET_STATUS     0x020
  39 #define HPET_COUNTER    0x0f0
  40 #define HPET_TN_CFG     0x000
  41 #define HPET_TN_CMP     0x008
  42 #define HPET_TN_ROUTE   0x010
  43 #define HPET_CFG_WRITE_MASK  0x3
  44
  45 #define HPET_ID_NUM_TIM_SHIFT   8
  46 #define HPET_ID_NUM_TIM_MASK    0x1f00
  47
  48 #define HPET_TN_TYPE_LEVEL       0x002
  49 #define HPET_TN_ENABLE           0x004
  50 #define HPET_TN_PERIODIC         0x008
  51 #define HPET_TN_PERIODIC_CAP     0x010
  52 #define HPET_TN_SIZE_CAP         0x020
  53 #define HPET_TN_SETVAL           0x040
  54 #define HPET_TN_32BIT            0x100
  55 #define HPET_TN_INT_ROUTE_MASK  0x3e00
  56 #define HPET_TN_FSB_ENABLE      0x4000
  57 #define HPET_TN_FSB_CAP         0x8000
  58 #define HPET_TN_CFG_WRITE_MASK  0x7f4e
  59 #define HPET_TN_INT_ROUTE_SHIFT      9
  60 #define HPET_TN_INT_ROUTE_CAP_SHIFT 32
  61 #define HPET_TN_CFG_BITS_READONLY_OR_RESERVED 0xffff80b1U
  62
  63 struct hpet_fw_entry
  64 {
  65     uint32_t event_timer_block_id;
  66     uint64_t address;
  67     uint16_t min_tick;
  68     uint8_t page_prot;
  69 } QEMU_PACKED;
  70
  71 struct hpet_fw_config
  72 {
  73     uint8_t count;
  74     struct hpet_fw_entry hpet[8];
  75 } QEMU_PACKED;
  76
  77 extern struct hpet_fw_config hpet_cfg;
  78
  79 #define TYPE_HPET "hpet"
  80
  81 static inline bool hpet_find(void)
  82 {
  83     return object_resolve_path_type("", TYPE_HPET, NULL);
  84 }
  85
  86 #endif