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 #define HPET_BASE               0xfed00000
  17 #define HPET_CLK_PERIOD         10000000ULL /* 10000000 femtoseconds == 10ns*/
  18
  19 #define FS_PER_NS 1000000
  20 #define HPET_MIN_TIMERS         3
  21 #define HPET_MAX_TIMERS         32
  22
  23 #define HPET_NUM_IRQ_ROUTES     32
  24
  25 #define HPET_LEGACY_PIT_INT     0
  26 #define HPET_LEGACY_RTC_INT     1
  27
  28 #define HPET_CFG_ENABLE 0x001
  29 #define HPET_CFG_LEGACY 0x002
  30
  31 #define HPET_ID         0x000
  32 #define HPET_PERIOD     0x004
  33 #define HPET_CFG        0x010
  34 #define HPET_STATUS     0x020
  35 #define HPET_COUNTER    0x0f0
  36 #define HPET_TN_CFG     0x000
  37 #define HPET_TN_CMP     0x008
  38 #define HPET_TN_ROUTE   0x010
  39 #define HPET_CFG_WRITE_MASK  0x3
  40
  41 #define HPET_ID_NUM_TIM_SHIFT   8
  42 #define HPET_ID_NUM_TIM_MASK    0x1f00
  43
  44 #define HPET_TN_TYPE_LEVEL       0x002
  45 #define HPET_TN_ENABLE           0x004
  46 #define HPET_TN_PERIODIC         0x008
  47 #define HPET_TN_PERIODIC_CAP     0x010
  48 #define HPET_TN_SIZE_CAP         0x020
  49 #define HPET_TN_SETVAL           0x040
  50 #define HPET_TN_32BIT            0x100
  51 #define HPET_TN_INT_ROUTE_MASK  0x3e00
  52 #define HPET_TN_FSB_ENABLE      0x4000
  53 #define HPET_TN_FSB_CAP         0x8000
  54 #define HPET_TN_CFG_WRITE_MASK  0x7f4e
  55 #define HPET_TN_INT_ROUTE_SHIFT      9
  56 #define HPET_TN_INT_ROUTE_CAP_SHIFT 32
  57 #define HPET_TN_CFG_BITS_READONLY_OR_RESERVED 0xffff80b1U
  58
  59 struct hpet_fw_entry
  60 {
  61     uint32_t event_timer_block_id;
  62     uint64_t address;
  63     uint16_t min_tick;
  64     uint8_t page_prot;
  65 } QEMU_PACKED;
  66
  67 struct hpet_fw_config
  68 {
  69     uint8_t count;
  70     struct hpet_fw_entry hpet[8];
  71 } QEMU_PACKED;
  72
  73 extern struct hpet_fw_config hpet_cfg;
  74
  75 bool hpet_find(void);
  76 #endif