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/*
             LUFA Library
     Copyright (C) Dean Camera, 2017.

  dean [at] fourwalledcubicle [dot] com
           www.lufa-lib.org
*/

/*
  Copyright 2017  Dean Camera (dean [at] fourwalledcubicle [dot] com)

  Permission to use, copy, modify, distribute, and sell this
  software and its documentation for any purpose is hereby granted
  without fee, provided that the above copyright notice appear in
  all copies and that both that the copyright notice and this
  permission notice and warranty disclaimer appear in supporting
  documentation, and that the name of the author not be used in
  advertising or publicity pertaining to distribution of the
  software without specific, written prior permission.

  The author disclaims all warranties with regard to this
  software, including all implied warranties of merchantability
  and fitness.  In no event shall the author be liable for any
  special, indirect or consequential damages or any damages
  whatsoever resulting from loss of use, data or profits, whether
  in an action of contract, negligence or other tortious action,
  arising out of or in connection with the use or performance of
  this software.
*/

/** \file
 *
 *  Header file for SCSI.c.
 */

#ifndef _SCSI_H_
#define _SCSI_H_

	/* Includes: */
		#include <avr/io.h>
		#include <avr/pgmspace.h>

		#include <LUFA/Drivers/USB/USB.h>

		#include "../TempDataLogger.h"
		#include "../Descriptors.h"
		#include "DataflashManager.h"
		#include "Config/AppConfig.h"

	/* Macros: */
		/** Macro to set the current SCSI sense data to the given key, additional sense code and additional sense qualifier. This
		 *  is for convenience, as it allows for all three sense values (returned upon request to the host to give information about
		 *  the last command failure) in a quick and easy manner.
		 *
		 *  \param[in] Key    New SCSI sense key to set the sense code to
		 *  \param[in] Acode  New SCSI additional sense key to set the additional sense code to
		 *  \param[in] Aqual  New SCSI additional sense key qualifier to set the additional sense qualifier code to
		 */
		#define SCSI_SET_SENSE(Key, Acode, Aqual)  do { SenseData.SenseKey                 = (Key);   \
		                                                SenseData.AdditionalSenseCode      = (Acode); \
		                                                SenseData.AdditionalSenseQualifier = (Aqual); } while (0)

		/** Macro for the \ref SCSI_Command_ReadWrite_10() function, to indicate that data is to be read from the storage medium. */
		#define DATA_READ           true

		/** Macro for the \ref SCSI_Command_ReadWrite_10() function, to indicate that data is to be written to the storage medium. */
		#define DATA_WRITE          false

		/** Value for the DeviceType entry in the SCSI_Inquiry_Response_t enum, indicating a Block Media device. */
		#define DEVICE_TYPE_BLOCK   0x00

		/** Value for the DeviceType entry in the SCSI_Inquiry_Response_t enum, indicating a CD-ROM device. */
		#define DEVICE_TYPE_CDROM   0x05

	/* Function Prototypes: */
		bool SCSI_DecodeSCSICommand(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo);

		#if defined(INCLUDE_FROM_SCSI_C)
			static bool SCSI_Command_Inquiry(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo);
			static bool SCSI_Command_Request_Sense(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo);
			static bool SCSI_Command_Read_Capacity_10(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo);
			static bool SCSI_Command_Send_Diagnostic(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo);
			static bool SCSI_Command_ReadWrite_10(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo,
			                                      const bool IsDataRead);
			static bool SCSI_Command_ModeSense_6(USB_ClassInfo_MS_Device_t* const MSInterfaceInfo);
		#endif

#endif
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/******************************************************************************
 * xenctrl.h
 *
 * A library for low-level access to the Xen control interfaces.
 *
 * Copyright (c) 2003-2004, K A Fraser.
 */

#ifndef XENCTRL_H
#define XENCTRL_H

/* Tell the Xen public headers we are a user-space tools build. */
#ifndef __XEN_TOOLS__
#define __XEN_TOOLS__ 1
#endif

#include <stddef.h>
#include <stdint.h>
#include <xen/xen.h>
#include <xen/domctl.h>
#include <xen/sysctl.h>
#include <xen/version.h>
#include <xen/event_channel.h>
#include <xen/sched.h>
#include <xen/memory.h>
#include <xen/acm.h>
#include <xen/acm_ops.h>

#ifdef __ia64__
#define XC_PAGE_SHIFT           14
#else
#define XC_PAGE_SHIFT           12
#endif
#define XC_PAGE_SIZE            (1UL << XC_PAGE_SHIFT)
#define XC_PAGE_MASK            (~(XC_PAGE_SIZE-1))

/*
 *  DEFINITIONS FOR CPU BARRIERS
 */

#if defined(__i386__)
#define mb()  __asm__ __volatile__ ( "lock; addl $0,0(%%esp)" : : : "memory" )
#define rmb() __asm__ __volatile__ ( "lock; addl $0,0(%%esp)" : : : "memory" )
#define wmb() __asm__ __volatile__ ( "" : : : "memory")
#elif defined(__x86_64__)
#define mb()  __asm__ __volatile__ ( "mfence" : : : "memory")
#define rmb() __asm__ __volatile__ ( "lfence" : : : "memory")
#define wmb() __asm__ __volatile__ ( "" : : : "memory")
#elif defined(__ia64__)
#define mb()   __asm__ __volatile__ ("mf" ::: "memory")
#define rmb()  __asm__ __volatile__ ("mf" ::: "memory")
#define wmb()  __asm__ __volatile__ ("mf" ::: "memory")
#elif defined(__powerpc__)
/* XXX loosen these up later */
#define mb()   __asm__ __volatile__ ("sync" : : : "memory")
#define rmb()  __asm__ __volatile__ ("sync" : : : "memory") /* lwsync? */
#define wmb()  __asm__ __volatile__ ("sync" : : : "memory") /* eieio? */
#else
#error "Define barriers"
#endif

/*
 *  INITIALIZATION FUNCTIONS
 */

/**
 * This function opens a handle to the hypervisor interface.  This function can
 * be called multiple times within a single process.  Multiple processes can
 * have an open hypervisor interface at the same time.
 *
 * Each call to this function should have a corresponding call to
 * xc_interface_close().
 *
 * This function can fail if the caller does not have superuser permission or
 * if a Xen-enabled kernel is not currently running.
 *
 * @return a handle to the hypervisor interface or -1 on failure
 */
int xc_interface_open(void);

/**
 * This function closes an open hypervisor interface.
 *
 * This function can fail if the handle does not represent an open interface or
 * if there were problems closing the interface.
 *
 * @parm xc_handle a handle to an open hypervisor interface
 * @return 0 on success, -1 otherwise.
 */
int xc_interface_close(int xc_handle);

/*
 * KERNEL INTERFACES
 */

/*
 * Resolve a kernel device name (e.g., "evtchn", "blktap0") into a kernel
 * device number. Returns -1 on error (and sets errno).
 */
int xc_find_device_number(const char *name);

/*
 * DOMAIN DEBUGGING FUNCTIONS
 */

typedef struct xc_core_header {
    unsigned int xch_magic;
    unsigned int xch_nr_vcpus;
    unsigned int xch_nr_pages;
    unsigned int xch_ctxt_offset;
    unsigned int xch_index_offset;
    unsigned int xch_pages_offset;
} xc_core_header_t;

#define XC_CORE_MAGIC     0xF00FEBED
#define XC_CORE_MAGIC_HVM 0xF00FEBEE

#ifdef __linux__

#include <sys/ptrace.h>
#include <thread_db.h>

typedef void (*thr_ev_handler_t)(long);

void xc_register_event_handler(
    thr_ev_handler_t h,
    td_event_e e);

long xc_ptrace(
    int xc_handle,
    enum __ptrace_request request,
    uint32_t  domid,
    long addr,
    long data);

int xc_waitdomain(
    int xc_handle,
    int domain,
    int *status,
    int options);

#endif /* __linux__ */

/*
 * DOMAIN MANAGEMENT FUNCTIONS
 */

typedef struct xc_dominfo {
    uint32_t      domid;
    uint32_t      ssidref;
    unsigned int  dying:1, crashed:1, shutdown:1,
                  paused:1, blocked:1, running:1,
                  hvm:1;
    unsigned int  shutdown_reason; /* only meaningful if shutdown==1 */
    unsigned long nr_pages;
    unsigned long shared_info_frame;
    uint64_t      cpu_time;
    unsigned long max_memkb;
    unsigned int  nr_online_vcpus;
    unsigned int  max_vcpu_id;
    xen_domain_handle_t handle;
} xc_dominfo_t;

typedef xen_domctl_getdomaininfo_t xc_domaininfo_t;
int xc_domain_create(int xc_handle,
                     uint32_t ssidref,
                     xen_domain_handle_t handle,
                     uint32_t flags,
                     uint32_t *pdomid);


/* Functions to produce a dump of a given domain
 *  xc_domain_dumpcore - produces a dump to a specified file
 *  xc_domain_dumpcore_via_callback - produces a dump, using a specified
 *                                    callback function
 */
int xc_domain_dumpcore(int xc_handle,
                       uint32_t domid,
                       const char *corename);

/* Define the callback function type for xc_domain_dumpcore_via_callback.
 *
 * This function is called by the coredump code for every "write",
 * and passes an opaque object for the use of the function and
 * created by the caller of xc_domain_dumpcore_via_callback.
 */
typedef int (dumpcore_rtn_t)(void *arg, char *buffer, unsigned int length);

int xc_domain_dumpcore_via_callback(int xc_handle,
                                    uint32_t domid,
                                    void *arg,
                                    dumpcore_rtn_t dump_rtn);

/*
 * This function sets the maximum number of vcpus that a domain may create.
 *
 * @parm xc_handle a handle to an open hypervisor interface.
 * @parm domid the domain id in which vcpus are to be created.
 * @parm max the maximum number of vcpus that the domain may create.
 * @return 0 on success, -1 on failure.
 */
int xc_domain_max_vcpus(int xc_handle,
                        uint32_t domid,
                        unsigned int max);

/**
 * This function pauses a domain. A paused domain still exists in memory
 * however it does not receive any timeslices from the hypervisor.
 *
 * @parm xc_handle a handle to an open hypervisor interface
 * @parm domid the domain id to pause
 * @return 0 on success, -1 on failure.
 */
int xc_domain_pause(int xc_handle,
                    uint32_t domid);
/**
 * This function unpauses a domain.  The domain should have been previously
 * paused.
 *
 * @parm xc_handle a handle to an open hypervisor interface
 * @parm domid the domain id to unpause
 * return 0 on success, -1 on failure
 */
int xc_domain_unpause(int xc_handle,
                      uint32_t domid);

/**
 * This function will destroy a domain.  Destroying a domain removes the domain
 * completely from memory.  This function should be called after sending the
 * domain a SHUTDOWN control message to free up the domain resources.
 *
 * @parm xc_handle a handle to an open hypervisor interface
 * @parm domid the domain id to destroy
 * @return 0 on success, -1 on failure
 */
int xc_domain_destroy(int xc_handle,
                      uint32_t domid);


/**
 * This function resumes a suspended domain. The domain should have
 * been previously suspended.
 *
 * @parm xc_handle a handle to an open hypervisor interface
 * @parm domid the domain id to resume
 * return 0 on success, -1 on failure
 */
int xc_domain_resume(int xc_handle,
                      uint32_t domid);

/**
 * This function will shutdown a domain. This is intended for use in
 * fully-virtualized domains where this operation is analogous to the
 * sched_op operations in a paravirtualized domain. The caller is
 * expected to give the reason for the shutdown.
 *
 * @parm xc_handle a handle to an open hypervisor interface
 * @parm domid the domain id to destroy
 * @parm reason is the reason (SHUTDOWN_xxx) for the shutdown
 * @return 0 on success, -1 on failure
 */
int xc_domain_shutdown(int xc_handle,
                       uint32_t domid,
                       int reason);

int xc_vcpu_setaffinity(int xc_handle,
                        uint32_t domid,
                        int vcpu,
                        uint64_t cpumap);
int xc_vcpu_getaffinity(int xc_handle,
                        uint32_t domid,
                        int vcpu,
                        uint64_t *cpumap);

/**
 * This function will return information about one or more domains. It is
 * designed to iterate over the list of domains. If a single domain is
 * requested, this function will return the next domain in the list - if
 * one exists. It is, therefore, important in this case to make sure the
 * domain requested was the one returned.
 *
 * @parm xc_handle a handle to an open hypervisor interface
 * @parm first_domid the first domain to enumerate information from.  Domains
 *                   are currently enumerate in order of creation.
 * @parm max_doms the number of elements in info
 * @parm info an array of max_doms size that will contain the information for
 *            the enumerated domains.
 * @return the number of domains enumerated or -1 on error
 */
int xc_domain_getinfo(int xc_handle,
                      uint32_t first_domid,
                      unsigned int max_doms,
                      xc_dominfo_t *info);


/**
 * This function will set the execution context for the specified vcpu.
 *
 * @parm xc_handle a handle to an open hypervisor interface
 * @parm domid the domain to set the vcpu context for
 * @parm vcpu the vcpu number for the context
 * @parm ctxt pointer to the the cpu context with the values to set
 * @return the number of domains enumerated or -1 on error
 */
int xc_vcpu_setcontext(int xc_handle,
                       uint32_t domid,
                       uint32_t vcpu,
                       vcpu_guest_context_t *ctxt);
/**
 * This function will return information about one or more domains, using a
 * single hypercall.  The domain information will be stored into the supplied
 * array of xc_domaininfo_t structures.
 *
 * @parm xc_handle a handle to an open hypervisor interface
 * @parm first_domain the first domain to enumerate information from.
 *                    Domains are currently enumerate in order of creation.
 * @parm max_domains the number of elements in info
 * @parm info an array of max_doms size that will contain the information for
 *            the enumerated domains.
 * @return the number of domains enumerated or -1 on error
 */
int xc_domain_getinfolist(int xc_handle,
                          uint32_t first_domain,
                          unsigned int max_domains,
                          xc_domaininfo_t *info);

/**
 * This function returns information about the context of a hvm domain
 * @parm xc_handle a handle to an open hypervisor interface
 * @parm domid the domain to get information from
 * @parm hvm_ctxt a pointer to a structure to store the execution context of the
 *            hvm domain
 * @return 0 on success, -1 on failure
 */
int xc_domain_hvm_getcontext(int xc_handle,
                             uint32_t domid,
                             hvm_domain_context_t *hvm_ctxt);

/**
 * This function will set the context for hvm domain
 *
 * @parm xc_handle a handle to an open hypervisor interface
 * @parm domid the domain to set the hvm domain context for
 * @parm hvm_ctxt pointer to the the hvm context with the values to set
 * @return 0 on success, -1 on failure
 */
int xc_domain_hvm_setcontext(int xc_handle,
                             uint32_t domid,
                             hvm_domain_context_t *hvm_ctxt);

/**
 * This function returns information about the execution context of a
 * particular vcpu of a domain.
 *
 * @parm xc_handle a handle to an open hypervisor interface
 * @parm domid the domain to get information from
 * @parm vcpu the vcpu number
 * @parm ctxt a pointer to a structure to store the execution context of the
 *            domain
 * @return 0 on success, -1 on failure
 */
int xc_vcpu_getcontext(int xc_handle,
                       uint32_t domid,
                       uint32_t vcpu,
                       vcpu_guest_context_t *ctxt);

typedef xen_domctl_getvcpuinfo_t xc_vcpuinfo_t;
int xc_vcpu_getinfo(int xc_handle,
                    uint32_t domid,
                    uint32_t vcpu,
                    xc_vcpuinfo_t *info);

int xc_domain_setcpuweight(int xc_handle,
                           uint32_t domid,
                           float weight);
long long xc_domain_get_cpu_usage(int xc_handle,
                                  domid_t domid,
                                  int vcpu);

int xc_domain_sethandle(int xc_handle, uint32_t domid,
                        xen_domain_handle_t handle);

typedef xen_domctl_shadow_op_stats_t xc_shadow_op_stats_t;
int xc_shadow_control(int xc_handle,
                      uint32_t domid,
                      unsigned int sop,
                      unsigned long *dirty_bitmap,
                      unsigned long pages,
                      unsigned long *mb,
                      uint32_t mode,
                      xc_shadow_op_stats_t *stats);

int xc_sedf_domain_set(int xc_handle,
                       uint32_t domid,
                       uint64_t period, uint64_t slice,
                       uint64_t latency, uint16_t extratime,
                       uint16_t weight);

int xc_sedf_domain_get(int xc_handle,
                       uint32_t domid,
                       uint64_t* period, uint64_t *slice,
                       uint64_t *latency, uint16_t *extratime,
                       uint16_t *weight);

int xc_sched_credit_domain_set(int xc_handle,
                               uint32_t domid,
                               struct xen_domctl_sched_credit *sdom);

int xc_sched_credit_domain_get(int xc_handle,
                               uint32_t domid,
                               struct xen_domctl_sched_credit *sdom);

/*
 * EVENT CHANNEL FUNCTIONS
 */

/**
 * This function allocates an unbound port.  Ports are named endpoints used for
 * interdomain communication.  This function is most useful in opening a
 * well-known port within a domain to receive events on.
 * 
 * NOTE: If you are allocating a *local* unbound port, you probably want to
 * use xc_evtchn_bind_unbound_port(). This function is intended for allocating
 * ports *only* during domain creation.
 *
 * @parm xc_handle a handle to an open hypervisor interface
 * @parm dom the ID of the local domain (the 'allocatee')
 * @parm remote_dom the ID of the domain who will later bind
 * @return allocated port (in @dom) on success, -1 on failure
 */
int xc_evtchn_alloc_unbound(int xc_handle,
                            uint32_t dom,
                            uint32_t remote_dom);

int xc_evtchn_reset(int xc_handle,
                    uint32_t dom);

int xc_physdev_pci_access_modify(int xc_handle,
                                 uint32_t domid,
                                 int bus,
                                 int dev,
                                 int func,
                                 int enable);

int xc_readconsolering(int xc_handle,
                       char **pbuffer,
                       unsigned int *pnr_chars,
                       int clear);

typedef xen_sysctl_physinfo_t xc_physinfo_t;
int xc_physinfo(int xc_handle,
                xc_physinfo_t *info);

int xc_sched_id(int xc_handle,
                int *sched_id);

int xc_domain_setmaxmem(int xc_handle,
                        uint32_t domid,
                        unsigned int max_memkb);

int xc_domain_set_memmap_limit(int xc_handle,
                               uint32_t domid,
                               unsigned long map_limitkb);

int xc_domain_set_time_offset(int xc_handle,
                              uint32_t domid,
                              int32_t time_offset_seconds);

int xc_domain_memory_increase_reservation(int xc_handle,
                                          uint32_t domid,
                                          unsigned long nr_extents,
                                          unsigned int extent_order,
                                          unsigned int address_bits,
                                          xen_pfn_t *extent_start);

int xc_domain_memory_decrease_reservation(int xc_handle,
                                          uint32_t domid,
                                          unsigned long nr_extents,
                                          unsigned int extent_order,
                                          xen_pfn_t *extent_start);

int xc_domain_memory_populate_physmap(int xc_handle,
                                      uint32_t domid,
                                      unsigned long nr_extents,
                                      unsigned int extent_order,
                                      unsigned int address_bits,
                                      xen_pfn_t *extent_start);

int xc_domain_ioport_permission(int xc_handle,
                                uint32_t domid,
                                uint32_t first_port,
                                uint32_t nr_ports,
                                uint32_t allow_access);

int xc_domain_irq_permission(int xc_handle,
                             uint32_t domid,
                             uint8_t pirq,
                             uint8_t allow_access);

int xc_domain_iomem_permission(int xc_handle,
                               uint32_t domid,
                               unsigned long first_mfn,
                               unsigned long nr_mfns,
                               uint8_t allow_access);

unsigned long xc_make_page_below_4G(int xc_handle, uint32_t domid,
                                    unsigned long mfn);

typedef xen_sysctl_perfc_desc_t xc_perfc_desc_t;
typedef xen_sysctl_perfc_val_t xc_perfc_val_t;
/* IMPORTANT: The caller is responsible for mlock()'ing the @desc and @val
   arrays. */
int xc_perfc_control(int xc_handle,
                     uint32_t op,
                     xc_perfc_desc_t *desc,
                     xc_perfc_val_t *val,
                     int *nbr_desc,
                     int *nbr_val);

/**
 * Memory maps a range within one domain to a local address range.  Mappings
 * should be unmapped with munmap and should follow the same rules as mmap
 * regarding page alignment.  Returns NULL on failure.
 *
 * In Linux, the ring queue for the control channel is accessible by mapping
 * the shared_info_frame (from xc_domain_getinfo()) + 2048.  The structure
 * stored there is of type control_if_t.
 *
 * @parm xc_handle a handle on an open hypervisor interface
 * @parm dom the domain to map memory from
 * @parm size the amount of memory to map (in multiples of page size)
 * @parm prot same flag as in mmap().
 * @parm mfn the frame address to map.
 */
void *xc_map_foreign_range(int xc_handle, uint32_t dom,
                            int size, int prot,
                            unsigned long mfn );

void *xc_map_foreign_batch(int xc_handle, uint32_t dom, int prot,
                           xen_pfn_t *arr, int num );

/**
 * Translates a virtual address in the context of a given domain and
 * vcpu returning the machine page frame number of the associated
 * page.
 *
 * @parm xc_handle a handle on an open hypervisor interface
 * @parm dom the domain to perform the translation in
 * @parm vcpu the vcpu to perform the translation on
 * @parm virt the virtual address to translate
 */
unsigned long xc_translate_foreign_address(int xc_handle, uint32_t dom,
                                           int vcpu, unsigned long long virt);

int xc_get_pfn_list(int xc_handle, uint32_t domid, xen_pfn_t *pfn_buf,
                    unsigned long max_pfns);

unsigned long xc_ia64_fpsr_default(void);

int xc_ia64_get_pfn_list(int xc_handle, uint32_t domid,
                         xen_pfn_t *pfn_buf,
                         unsigned int start_page, unsigned int nr_pages);

int xc_copy_to_domain_page(int xc_handle, uint32_t domid,
                           unsigned long dst_pfn, const char *src_page);

int xc_clear_domain_page(int xc_handle, uint32_t domid,
                         unsigned long dst_pfn);

long xc_get_max_pages(int xc_handle, uint32_t domid);

int xc_mmuext_op(int xc_handle, struct mmuext_op *op, unsigned int nr_ops,
                 domid_t dom);

int xc_memory_op(int xc_handle, int cmd, void *arg);

int xc_get_pfn_type_batch(int xc_handle, uint32_t dom,
                          int num, unsigned long *arr);


/* Get current total pages allocated to a domain. */
long xc_get_tot_pages(int xc_handle, uint32_t domid);


/*
 * Trace Buffer Operations
 */

/**
 * xc_tbuf_enable - enable tracing buffers
 *
 * @parm xc_handle a handle to an open hypervisor interface
 * @parm cnt size of tracing buffers to create (in pages)
 * @parm mfn location to store mfn of the trace buffers to
 * @parm size location to store the size (in bytes) of a trace buffer to
 *
 * Gets the machine address of the trace pointer area and the size of the
 * per CPU buffers.
 */
int xc_tbuf_enable(int xc_handle, unsigned long pages,
                   unsigned long *mfn, unsigned long *size);

/*
 * Disable tracing buffers.
 */
int xc_tbuf_disable(int xc_handle);

/**
 * This function sets the size of the trace buffers. Setting the size
 * is currently a one-shot operation that may be performed either at boot
 * time or via this interface, not both. The buffer size must be set before
 * enabling tracing.
 *
 * @parm xc_handle a handle to an open hypervisor interface
 * @parm size the size in pages per cpu for the trace buffers
 * @return 0 on success, -1 on failure.
 */
int xc_tbuf_set_size(int xc_handle, unsigned long size);

/**
 * This function retrieves the current size of the trace buffers.
 * Note that the size returned is in terms of bytes, not pages.

 * @parm xc_handle a handle to an open hypervisor interface
 * @parm size will contain the size in bytes for the trace buffers
 * @return 0 on success, -1 on failure.
 */
int xc_tbuf_get_size(int xc_handle, unsigned long *size);

int xc_tbuf_set_cpu_mask(int xc_handle, uint32_t mask);

int xc_tbuf_set_evt_mask(int xc_handle, uint32_t mask);

int xc_domctl(int xc_handle, struct xen_domctl *domctl);
int xc_sysctl(int xc_handle, struct xen_sysctl *sysctl);

int xc_version(int xc_handle, int cmd, void *arg);

/*
 * MMU updates.
 */
#define MAX_MMU_UPDATES 1024
struct xc_mmu {
    mmu_update_t updates[MAX_MMU_UPDATES];
    int          idx;
    domid_t      subject;
};
typedef struct xc_mmu xc_mmu_t;
xc_mmu_t *xc_init_mmu_updates(int xc_handle, domid_t dom);
int xc_add_mmu_update(int xc_handle, xc_mmu_t *mmu,
                   unsigned long long ptr, unsigned long long val);
int xc_finish_mmu_updates(int xc_handle, xc_mmu_t *mmu);

int xc_acm_op(int xc_handle, int cmd, void *arg, unsigned long arg_size);

/*
 * Return a handle to the event channel driver, or -1 on failure, in which case
 * errno will be set appropriately.
 */
int xc_evtchn_open(void);

/*
 * Close a handle previously allocated with xc_evtchn_open().
 */
int xc_evtchn_close(int xce_handle);

/*
 * Return an fd that can be select()ed on for further calls to
 * xc_evtchn_pending().
 */
int xc_evtchn_fd(int xce_handle);

/*
 * Notify the given event channel. Returns -1 on failure, in which case
 * errno will be set appropriately.
 */
int xc_evtchn_notify(int xce_handle, evtchn_port_t port);

/*
 * Returns a new event port awaiting interdomain connection from the given
 * domain ID, or -1 on failure, in which case errno will be set appropriately.
 */
evtchn_port_t xc_evtchn_bind_unbound_port(int xce_handle, int domid);

/*
 * Returns a new event port bound to the remote port for the given domain ID,
 * or -1 on failure, in which case errno will be set appropriately.
 */
evtchn_port_t xc_evtchn_bind_interdomain(int xce_handle, int domid,
    evtchn_port_t remote_port);

/*
 * Unbind the given event channel. Returns -1 on failure, in which case errno
 * will be set appropriately.
 */
int xc_evtchn_unbind(int xce_handle, evtchn_port_t port);

/*
 * Bind an event channel to the given VIRQ. Returns the event channel bound to
 * the VIRQ, or -1 on failure, in which case errno will be set appropriately.
 */
evtchn_port_t xc_evtchn_bind_virq(int xce_handle, unsigned int virq);

/*
 * Return the next event channel to become pending, or -1 on failure, in which
 * case errno will be set appropriately.  
 */
evtchn_port_t xc_evtchn_pending(int xce_handle);

/*
 * Unmask the given event channel. Returns -1 on failure, in which case errno
 * will be set appropriately.
 */
int xc_evtchn_unmask(int xce_handle, evtchn_port_t port);

int xc_hvm_set_pci_intx_level(
    int xc_handle, domid_t dom,
    uint8_t domain, uint8_t bus, uint8_t device, uint8_t intx,
    unsigned int level);
int xc_hvm_set_isa_irq_level(
    int xc_handle, domid_t dom,
    uint8_t isa_irq,
    unsigned int level);

int xc_hvm_set_pci_link_route(
    int xc_handle, domid_t dom, uint8_t link, uint8_t isa_irq);


typedef enum {
  XC_ERROR_NONE = 0,
  XC_INTERNAL_ERROR = 1,
  XC_INVALID_KERNEL = 2,
} xc_error_code;

#define XC_MAX_ERROR_MSG_LEN 1024
typedef struct {
  int code;
  char message[XC_MAX_ERROR_MSG_LEN];
} xc_error;

/*
 * Return a pointer to the last error. This pointer and the
 * data pointed to are only valid until the next call to
 * libxc.
 */
const xc_error const *xc_get_last_error(void);

/*
 * Clear the last error
 */
void xc_clear_last_error(void);

typedef void (*xc_error_handler)(const xc_error const* err);

/*
 * The default error handler which prints to stderr
 */
void xc_default_error_handler(const xc_error const* err);

/*
 * Convert an error code into a text description
 */
const char *xc_error_code_to_desc(int code);

/*
 * Registers a callback to handle errors
 */
xc_error_handler xc_set_error_handler(xc_error_handler handler);

/* PowerPC specific. */
int xc_alloc_real_mode_area(int xc_handle,
                            uint32_t domid,
                            unsigned int log);
#endif