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 "qemu/timer.h"
  29 #include "qom/object.h"
  30 #include "hw/timer/sse-counter.h"
  31
  32 #define TYPE_SSE_TIMER "sse-timer"
  33 OBJECT_DECLARE_SIMPLE_TYPE(SSETimer, SSE_TIMER)
  34
  35 struct SSETimer {
  36     /*< private >*/
  37     SysBusDevice parent_obj;
  38
  39     /*< public >*/
  40     MemoryRegion iomem;
  41     qemu_irq irq;
  42     SSECounter *counter;
  43     QEMUTimer timer;
  44     Notifier counter_notifier;
  45
  46     uint32_t cntfrq;
  47     uint32_t cntp_ctl;
  48     uint64_t cntp_cval;
  49     uint64_t cntp_aival;
  50     uint32_t cntp_aival_ctl;
  51     uint32_t cntp_aival_reload;
  52 };
  53
  54 #endif