qemu

FORK: QEMU emulator
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armv7m_systick.h (1142B)

      1 /*
      2  * ARMv7M SysTick timer
      3  *
      4  * Copyright (c) 2006-2007 CodeSourcery.
      5  * Written by Paul Brook
      6  * Copyright (c) 2017 Linaro Ltd
      7  * Written by Peter Maydell
      8  *
      9  * This code is licensed under the GPL (version 2 or later).
     10  */
     11 
     12 #ifndef HW_TIMER_ARMV7M_SYSTICK_H
     13 #define HW_TIMER_ARMV7M_SYSTICK_H
     14 
     15 #include "hw/sysbus.h"
     16 #include "qom/object.h"
     17 #include "hw/ptimer.h"
     18 #include "hw/clock.h"
     19 
     20 #define TYPE_SYSTICK "armv7m_systick"
     21 
     22 OBJECT_DECLARE_SIMPLE_TYPE(SysTickState, SYSTICK)
     23 
     24 /*
     25  * QEMU interface:
     26  *  + sysbus MMIO region 0 is the register interface (covering
     27  *    the registers which are mapped at address 0xE000E010)
     28  *  + sysbus IRQ 0 is the interrupt line to the NVIC
     29  *  + Clock input "refclk" is the external reference clock
     30  *    (used when SYST_CSR.CLKSOURCE == 0)
     31  *  + Clock input "cpuclk" is the main CPU clock
     32  *    (used when SYST_CSR.CLKSOURCE == 1)
     33  */
     34 
     35 struct SysTickState {
     36     /*< private >*/
     37     SysBusDevice parent_obj;
     38     /*< public >*/
     39 
     40     uint32_t control;
     41     uint32_t reload;
     42     int64_t tick;
     43     ptimer_state *ptimer;
     44     MemoryRegion iomem;
     45     qemu_irq irq;
     46     Clock *refclk;
     47     Clock *cpuclk;
     48 };
     49 
     50 #endif