text: #ifndef QEMU_HW_XEN_H
  #define QEMU_HW_XEN_H
  
  /*
   * public xen header
   *   stuff needed outside xen-*.c, i.e. interfaces to qemu.
   *   must not depend on any xen headers being present in
   *   /usr/include/xen, so it can be included unconditionally.
   */
  
  #include "qemu-common.h"
  #include "exec/cpu-common.h"
  #include "hw/irq.h"
  
  /* xen-machine.c */
  enum xen_mode {
      XEN_EMULATE = 0,  // xen emulation, using xenner (default)
      XEN_CREATE,       // create xen domain
      XEN_ATTACH        // attach to xen domain created by xend
  };
  
  extern uint32_t xen_domid;
  extern enum xen_mode xen_mode;
  extern bool xen_domid_restrict;
  
  extern bool xen_allowed;
  
  static inline bool xen_enabled(void)
  {
      return xen_allowed;
  }
  
  int xen_pci_slot_get_pirq(PCIDevice *pci_dev, int irq_num);
  void xen_piix3_set_irq(void *opaque, int irq_num, int level);
  void xen_piix_pci_write_config_client(uint32_t address, uint32_t val, int len);
  void xen_hvm_inject_msi(uint64_t addr, uint32_t data);
  int xen_is_pirq_msi(uint32_t msi_data);
  
  qemu_irq *xen_interrupt_controller_init(void);
  
  void xenstore_store_pv_console_info(int i, struct Chardev *chr);
  
  void xen_hvm_init(PCMachineState *pcms, MemoryRegion **ram_memory);
  
  void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size,
                     struct MemoryRegion *mr, Error **errp);
  void xen_hvm_modified_memory(ram_addr_t start, ram_addr_t length);
  
  void xen_register_framebuffer(struct MemoryRegion *mr);
  
  #endif /* QEMU_HW_XEN_H */
  