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/******************************************************************************
* Guest OS interface to ARM Xen.
*
* Stefano Stabellini <stefano.stabellini@eu.citrix.com>, Citrix, 2012
*/
#ifndef _ASM_ARM_XEN_INTERFACE_H
#define _ASM_ARM_XEN_INTERFACE_H
#include <linux/types.h>
#define uint64_aligned_t uint64_t __attribute__((aligned(8)))
#define __DEFINE_GUEST_HANDLE(name, type) \
typedef struct { union { type *p; uint64_aligned_t q; }; } \
__guest_handle_ ## name
#define DEFINE_GUEST_HANDLE_STRUCT(name) \
__DEFINE_GUEST_HANDLE(name, struct name)
#define DEFINE_GUEST_HANDLE(name) __DEFINE_GUEST_HANDLE(name, name)
#define GUEST_HANDLE(name) __guest_handle_ ## name
#define set_xen_guest_handle(hnd, val) \
do { \
if (sizeof(hnd) == 8) \
*(uint64_t *)&(hnd) = 0; \
(hnd).p = val; \
} while (0)
#ifndef __ASSEMBLY__
/* Explicitly size integers that represent pfns in the interface with
* Xen so that we can have one ABI that works for 32 and 64 bit guests.
* Note that this means that the xen_pfn_t type may be capable of
* representing pfn's which the guest cannot represent in its own pfn
* type. However since pfn space is controlled by the guest this is
* fine since it simply wouldn't be able to create any sure pfns in
* the first place.
*/
typedef uint64_t xen_pfn_t;
#define PRI_xen_pfn "llx"
typedef uint64_t xen_ulong_t;
#define PRI_xen_ulong "llx"
/* Guest handles for primitive C types. */
__DEFINE_GUEST_HANDLE(uchar, unsigned char);
__DEFINE_GUEST_HANDLE(uint, unsigned int);
DEFINE_GUEST_HANDLE(char);
DEFINE_GUEST_HANDLE(int);
DEFINE_GUEST_HANDLE(void);
DEFINE_GUEST_HANDLE(uint64_t);
DEFINE_GUEST_HANDLE(uint32_t);
DEFINE_GUEST_HANDLE(xen_pfn_t);
DEFINE_GUEST_HANDLE(xen_ulong_t);
/* Maximum number of virtual CPUs in multi-processor guests. */
#define MAX_VIRT_CPUS 1
struct arch_vcpu_info { };
struct arch_shared_info { };
/* TODO: Move pvclock definitions some place arch independent */
struct pvclock_vcpu_time_info {
u32 version;
u32 pad0;
u64 tsc_timestamp;
u64 system_time;
u32 tsc_to_system_mul;
s8 tsc_shift;
u8 flags;
u8 pad[2];
} __attribute__((__packed__)); /* 32 bytes */
/* It is OK to have a 12 bytes struct with no padding because it is packed */
struct pvclock_wall_clock {
u32 version;
u32 sec;
u32 nsec;
} __attribute__((__packed__));
#endif
#endif /* _ASM_ARM_XEN_INTERFACE_H */