| 1 | /*- |
| 2 | * Copyright (c) 2005 Poul-Henning Kamp |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * |
| 14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
| 15 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 17 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 18 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 19 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 20 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 21 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 22 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 23 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 24 | * SUCH DAMAGE. |
| 25 | */ |
| 26 | |
| 27 | #ifndef __ACPI_HPET_H__ |
| 28 | #define __ACPI_HPET_H__ |
| 29 | |
| 30 | #define HPET_MEM_WIDTH 0x400 /* Expected memory region size */ |
| 31 | #define HPET_MEM_MIN_WIDTH 0x100 /* Minimum memory region size */ |
| 32 | |
| 33 | /* General registers */ |
| 34 | #define HPET_CAPABILITIES 0x0 /* General capabilities and ID */ |
| 35 | #define HPET_CAP_VENDOR_ID 0xffff0000 |
| 36 | #define HPET_CAP_LEG_RT 0x00008000 |
| 37 | #define HPET_CAP_COUNT_SIZE 0x00002000 /* 1 = 64-bit, 0 = 32-bit */ |
| 38 | #define HPET_CAP_NUM_TIM 0x00001f00 |
| 39 | #define HPET_CAP_REV_ID 0x000000ff |
| 40 | #define HPET_PERIOD 0x4 /* Period (1/hz) of timer */ |
| 41 | #define HPET_CONFIG 0x10 /* General configuration register */ |
| 42 | #define HPET_CNF_LEG_RT 0x00000002 |
| 43 | #define HPET_CNF_ENABLE 0x00000001 |
| 44 | #define HPET_ISR 0x20 /* General interrupt status register */ |
| 45 | #define HPET_MAIN_COUNTER 0xf0 /* Main counter register */ |
| 46 | |
| 47 | /* Timer registers */ |
| 48 | #define HPET_TIMER_CAP_CNF(x) ((x) * 0x20 + 0x100) |
| 49 | #define HPET_TCAP_INT_ROUTE 0xffffffff00000000 |
| 50 | #define HPET_TCAP_FSB_INT_DEL 0x00008000 |
| 51 | #define HPET_TCNF_FSB_EN 0x00004000 |
| 52 | #define HPET_TCNF_INT_ROUTE 0x00003e00 |
| 53 | #define HPET_TCNF_32MODE 0x00000100 |
| 54 | #define HPET_TCNF_VAL_SET 0x00000040 |
| 55 | #define HPET_TCAP_SIZE 0x00000020 /* 1 = 64-bit, 0 = 32-bit */ |
| 56 | #define HPET_TCAP_PER_INT 0x00000010 /* Supports periodic interrupts */ |
| 57 | #define HPET_TCNF_TYPE 0x00000008 /* 1 = periodic, 0 = one-shot */ |
| 58 | #define HPET_TCNF_INT_ENB 0x00000004 |
| 59 | #define HPET_TCNF_INT_TYPE 0x00000002 /* 1 = level triggered, 0 = edge */ |
| 60 | #define HPET_TIMER_COMPARATOR(x) ((x) * 0x20 + 0x108) |
| 61 | #define HPET_TIMER_FSB_VAL(x) ((x) * 0x20 + 0x110) |
| 62 | #define HPET_TIMER_FSB_ADDR(x) ((x) * 0x20 + 0x114) |
| 63 | |
| 64 | #define HPET_MIN_CYCLES 128 /* Period considered reliable. */ |
| 65 | |
| 66 | #ifdef _KERNEL |
| 67 | struct timecounter; |
| 68 | struct vdso_timehands; |
| 69 | struct vdso_timehands32; |
| 70 | |
| 71 | uint32_t hpet_vdso_timehands(struct vdso_timehands *vdso_th, |
| 72 | struct timecounter *tc); |
| 73 | uint32_t hpet_vdso_timehands32(struct vdso_timehands32 *vdso_th32, |
| 74 | struct timecounter *tc); |
| 75 | #endif |
| 76 | |
| 77 | #endif /* !__ACPI_HPET_H__ */ |