include/hw/timer/mss-timer.h

   1 /*
   2  * Microsemi SmartFusion2 Timer.
   3  *
   4  * Copyright (c) 2017 Subbaraya Sundeep <sundeep.lkml@gmail.com>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #ifndef HW_MSS_TIMER_H
  26 #define HW_MSS_TIMER_H
  27
  28 #include "hw/sysbus.h"
  29 #include "hw/ptimer.h"
  30 #include "qom/object.h"
  31
  32 #define TYPE_MSS_TIMER     "mss-timer"
  33 OBJECT_DECLARE_SIMPLE_TYPE(MSSTimerState, MSS_TIMER)
  34
  35 /*
  36  * There are two 32-bit down counting timers.
  37  * Timers 1 and 2 can be concatenated into a single 64-bit Timer
  38  * that operates either in Periodic mode or in One-shot mode.
  39  * Writing 1 to the TIM64_MODE register bit 0 sets the Timers in 64-bit mode.
  40  * In 64-bit mode, writing to the 32-bit registers has no effect.
  41  * Similarly, in 32-bit mode, writing to the 64-bit mode registers
  42  * has no effect. Only two 32-bit timers are supported currently.
  43  */
  44 #define NUM_TIMERS        2
  45
  46 #define R_TIM1_MAX        6
  47
  48 struct Msf2Timer {
  49     ptimer_state *ptimer;
  50
  51     uint32_t regs[R_TIM1_MAX];
  52     qemu_irq irq;
  53 };
  54
  55 struct MSSTimerState {
  56     SysBusDevice parent_obj;
  57
  58     MemoryRegion mmio;
  59     uint32_t freq_hz;
  60     struct Msf2Timer timers[NUM_TIMERS];
  61 };
  62
  63 #endif /* HW_MSS_TIMER_H */