LXR linux/arch/mips/include/asm/hpet.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _ASM_HPET_H
   3#define _ASM_HPET_H
   4
   5#ifdef CONFIG_RS780_HPET
   6
   7#define HPET_MMAP_SIZE          1024
   8
   9#define HPET_ID                 0x000
  10#define HPET_PERIOD             0x004
  11#define HPET_CFG                0x010
  12#define HPET_STATUS             0x020
  13#define HPET_COUNTER    0x0f0
  14
  15#define HPET_Tn_CFG(n)          (0x100 + 0x20 * n)
  16#define HPET_Tn_CMP(n)          (0x108 + 0x20 * n)
  17#define HPET_Tn_ROUTE(n)        (0x110 + 0x20 * n)
  18
  19#define HPET_T0_IRS             0x001
  20#define HPET_T1_IRS             0x002
  21#define HPET_T3_IRS             0x004
  22
  23#define HPET_T0_CFG             0x100
  24#define HPET_T0_CMP             0x108
  25#define HPET_T0_ROUTE   0x110
  26#define HPET_T1_CFG             0x120
  27#define HPET_T1_CMP             0x128
  28#define HPET_T1_ROUTE   0x130
  29#define HPET_T2_CFG             0x140
  30#define HPET_T2_CMP             0x148
  31#define HPET_T2_ROUTE   0x150
  32
  33#define HPET_ID_REV                     0x000000ff
  34#define HPET_ID_NUMBER          0x00001f00
  35#define HPET_ID_64BIT           0x00002000
  36#define HPET_ID_LEGSUP          0x00008000
  37#define HPET_ID_VENDOR          0xffff0000
  38#define HPET_ID_NUMBER_SHIFT    8
  39#define HPET_ID_VENDOR_SHIFT    16
  40
  41#define HPET_CFG_ENABLE         0x001
  42#define HPET_CFG_LEGACY         0x002
  43#define HPET_LEGACY_8254                2
  44#define HPET_LEGACY_RTC         8
  45
  46#define HPET_TN_LEVEL           0x0002
  47#define HPET_TN_ENABLE          0x0004
  48#define HPET_TN_PERIODIC        0x0008
  49#define HPET_TN_PERIODIC_CAP    0x0010
  50#define HPET_TN_64BIT_CAP       0x0020
  51#define HPET_TN_SETVAL          0x0040
  52#define HPET_TN_32BIT           0x0100
  53#define HPET_TN_ROUTE           0x3e00
  54#define HPET_TN_FSB                     0x4000
  55#define HPET_TN_FSB_CAP         0x8000
  56#define HPET_TN_ROUTE_SHIFT     9
  57
  58/* Max HPET Period is 10^8 femto sec as in HPET spec */
  59#define HPET_MAX_PERIOD         100000000UL
  60/*
  61 * Min HPET period is 10^5 femto sec just for safety. If it is less than this,
  62 * then 32 bit HPET counter wrapsaround in less than 0.5 sec.
  63 */
  64#define HPET_MIN_PERIOD         100000UL
  65
  66#define HPET_ADDR               0x20000
  67#define HPET_MMIO_ADDR  0x90000e0000020000
  68#define HPET_FREQ               14318780
  69#define HPET_COMPARE_VAL        ((HPET_FREQ + HZ / 2) / HZ)
  70#define HPET_T0_IRQ             0
  71
  72extern void __init setup_hpet_timer(void);
  73#endif /* CONFIG_RS780_HPET */
  74#endif /* _ASM_HPET_H */
  75