LXR uboot/include/xen/arm/interface.h

   1/* SPDX-License-Identifier: GPL-2.0
   2 *
   3 * Guest OS interface to ARM Xen.
   4 *
   5 * Stefano Stabellini <stefano.stabellini@eu.citrix.com>, Citrix, 2012
   6 */
   7
   8#ifndef _ASM_ARM_XEN_INTERFACE_H
   9#define _ASM_ARM_XEN_INTERFACE_H
  10
  11#ifndef __ASSEMBLY__
  12#include <linux/types.h>
  13#endif
  14
  15#define uint64_aligned_t u64 __attribute__((aligned(8)))
  16
  17#define __DEFINE_GUEST_HANDLE(name, type) \
  18        typedef struct { union { type * p; uint64_aligned_t q; }; }  \
  19                __guest_handle_ ## name
  20
  21#define DEFINE_GUEST_HANDLE_STRUCT(name) \
  22        __DEFINE_GUEST_HANDLE(name, struct name)
  23#define DEFINE_GUEST_HANDLE(name) __DEFINE_GUEST_HANDLE(name, name)
  24#define GUEST_HANDLE(name)        __guest_handle_ ## name
  25
  26#define set_xen_guest_handle(hnd, val)                  \
  27        do {                                            \
  28                if (sizeof(hnd) == 8)                   \
  29                        *(u64 *)&(hnd) = 0;     \
  30                (hnd).p = val;                          \
  31        } while (0)
  32
  33#define __HYPERVISOR_platform_op_raw __HYPERVISOR_platform_op
  34
  35#ifndef __ASSEMBLY__
  36/* Explicitly size integers that represent pfns in the interface with
  37 * Xen so that we can have one ABI that works for 32 and 64 bit guests.
  38 * Note that this means that the xen_pfn_t type may be capable of
  39 * representing pfn's which the guest cannot represent in its own pfn
  40 * type. However since pfn space is controlled by the guest this is
  41 * fine since it simply wouldn't be able to create any sure pfns in
  42 * the first place.
  43 */
  44typedef u64 xen_pfn_t;
  45#define PRI_xen_pfn "llx"
  46typedef u64 xen_ulong_t;
  47#define PRI_xen_ulong "llx"
  48typedef s64 xen_long_t;
  49#define PRI_xen_long "llx"
  50/* Guest handles for primitive C types. */
  51__DEFINE_GUEST_HANDLE(uchar, unsigned char);
  52__DEFINE_GUEST_HANDLE(uint,  unsigned int);
  53DEFINE_GUEST_HANDLE(char);
  54DEFINE_GUEST_HANDLE(int);
  55DEFINE_GUEST_HANDLE(void);
  56DEFINE_GUEST_HANDLE(u64);
  57DEFINE_GUEST_HANDLE(u32);
  58DEFINE_GUEST_HANDLE(xen_pfn_t);
  59DEFINE_GUEST_HANDLE(xen_ulong_t);
  60
  61/* Maximum number of virtual CPUs in multi-processor guests. */
  62#define MAX_VIRT_CPUS 1
  63
  64struct arch_vcpu_info { };
  65struct arch_shared_info { };
  66
  67/* TODO: Move pvclock definitions some place arch independent */
  68struct pvclock_vcpu_time_info {
  69        u32   version;
  70        u32   pad0;
  71        u64   tsc_timestamp;
  72        u64   system_time;
  73        u32   tsc_to_system_mul;
  74        s8    tsc_shift;
  75        u8    flags;
  76        u8    pad[2];
  77} __attribute__((__packed__)); /* 32 bytes */
  78
  79/* It is OK to have a 12 bytes struct with no padding because it is packed */
  80struct pvclock_wall_clock {
  81        u32   version;
  82        u32   sec;
  83        u32   nsec;
  84        u32   sec_hi;
  85} __attribute__((__packed__));
  86#endif
  87
  88#endif /* _ASM_ARM_XEN_INTERFACE_H */
  89