text: #ifndef QEMU_HW_XEN_H
  #define QEMU_HW_XEN_H 1
  /*
   * 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 <inttypes.h>
  
  #include "qemu-common.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 int xen_allowed;
  
  static inline int xen_enabled(void)
  {
  #if defined(CONFIG_XEN_BACKEND) && !defined(CONFIG_NO_XEN)
      return xen_allowed;
  #else
      return 0;
  #endif
  }
  
  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_cmos_set_s3_resume(void *opaque, int irq, int level);
  
  qemu_irq *xen_interrupt_controller_init(void);
  
  int xen_init(void);
  int xen_hvm_init(void);
  void xen_vcpu_init(void);
  void xenstore_store_pv_console_info(int i, struct CharDriverState *chr);
  
  #if defined(NEED_CPU_H) && !defined(CONFIG_USER_ONLY)
  void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size);
  void xen_modified_memory(ram_addr_t start, ram_addr_t length);
  #endif
  
  #if defined(CONFIG_XEN) && CONFIG_XEN_CTRL_INTERFACE_VERSION < 400
  #  define HVM_MAX_VCPUS 32
  #endif
  
  #endif /* QEMU_HW_XEN_H */
  