include/hw/arm/armv7m.h

   1 /*
   2  * ARMv7M CPU object
   3  *
   4  * Copyright (c) 2017 Linaro Ltd
   5  * Written by Peter Maydell <peter.maydell@linaro.org>
   6  *
   7  * This code is licensed under the GPL version 2 or later.
   8  */
   9
  10 #ifndef HW_ARM_ARMV7M_H
  11 #define HW_ARM_ARMV7M_H
  12
  13 #include "hw/sysbus.h"
  14 #include "hw/arm/armv7m_nvic.h"
  15
  16 #define TYPE_BITBAND "ARM,bitband-memory"
  17 #define BITBAND(obj) OBJECT_CHECK(BitBandState, (obj), TYPE_BITBAND)
  18
  19 typedef struct {
  20     /*< private >*/
  21     SysBusDevice parent_obj;
  22     /*< public >*/
  23
  24     AddressSpace *source_as;
  25     MemoryRegion iomem;
  26     uint32_t base;
  27     MemoryRegion *source_memory;
  28 } BitBandState;
  29
  30 #define TYPE_ARMV7M "armv7m"
  31 #define ARMV7M(obj) OBJECT_CHECK(ARMv7MState, (obj), TYPE_ARMV7M)
  32
  33 #define ARMV7M_NUM_BITBANDS 2
  34
  35 /* ARMv7M container object.
  36  * + Unnamed GPIO input lines: external IRQ lines for the NVIC
  37  * + Named GPIO output SYSRESETREQ: signalled for guest AIRCR.SYSRESETREQ
  38  * + Property "cpu-model": CPU model to instantiate
  39  * + Property "num-irq": number of external IRQ lines
  40  * + Property "memory": MemoryRegion defining the physical address space
  41  *   that CPU accesses see. (The NVIC, bitbanding and other CPU-internal
  42  *   devices will be automatically layered on top of this view.)
  43  */
  44 typedef struct ARMv7MState {
  45     /*< private >*/
  46     SysBusDevice parent_obj;
  47     /*< public >*/
  48     NVICState nvic;
  49     BitBandState bitband[ARMV7M_NUM_BITBANDS];
  50     ARMCPU *cpu;
  51
  52     /* MemoryRegion we pass to the CPU, with our devices layered on
  53      * top of the ones the board provides in board_memory.
  54      */
  55     MemoryRegion container;
  56
  57     /* Properties */
  58     char *cpu_model;
  59     /* MemoryRegion the board provides to us (with its devices, RAM, etc) */
  60     MemoryRegion *board_memory;
  61 } ARMv7MState;
  62
  63 #endif