LXR qemu/include/hw/timer/sse-timer.h

   1/*
   2 * Arm SSE Subsystem System Timer
   3 *
   4 * Copyright (c) 2020 Linaro Limited
   5 * Written by Peter Maydell
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License version 2 or
   9 * (at your option) any later version.
  10 */
  11
  12/*
  13 * This is a model of the "System timer" which is documented in
  14 * the Arm SSE-123 Example Subsystem Technical Reference Manual:
  15 * https://developer.arm.com/documentation/101370/latest/
  16 *
  17 * QEMU interface:
  18 *  + QOM property "counter": link property to be set to the
  19 *    TYPE_SSE_COUNTER timestamp counter device this timer runs off
  20 *  + sysbus MMIO region 0: the register bank
  21 *  + sysbus IRQ 0: timer interrupt
  22 */
  23
  24#ifndef SSE_TIMER_H
  25#define SSE_TIMER_H
  26
  27#include "hw/sysbus.h"
  28#include "qom/object.h"
  29#include "hw/timer/sse-counter.h"
  30
  31#define TYPE_SSE_TIMER "sse-timer"
  32OBJECT_DECLARE_SIMPLE_TYPE(SSETimer, SSE_TIMER)
  33
  34struct SSETimer {
  35    /*< private >*/
  36    SysBusDevice parent_obj;
  37
  38    /*< public >*/
  39    MemoryRegion iomem;
  40    qemu_irq irq;
  41    SSECounter *counter;
  42    QEMUTimer timer;
  43    Notifier counter_notifier;
  44
  45    uint32_t cntfrq;
  46    uint32_t cntp_ctl;
  47    uint64_t cntp_cval;
  48    uint64_t cntp_aival;
  49    uint32_t cntp_aival_ctl;
  50    uint32_t cntp_aival_reload;
  51};
  52
  53#endif
  54