| 1 | /* |
| 2 | * Virtio Accessor Support: In case your target can change endian. |
| 3 | * |
| 4 | * Copyright IBM, Corp. 2013 |
| 5 | * |
| 6 | * Authors: |
| 7 | * Rusty Russell <rusty@au.ibm.com> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation, either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | */ |
| 15 | |
| 16 | #ifndef QEMU_VIRTIO_ACCESS_H |
| 17 | #define QEMU_VIRTIO_ACCESS_H |
| 18 | |
| 19 | #include "exec/hwaddr.h" |
| 20 | #include "system/memory_cached.h" |
| 21 | #include "hw/virtio/virtio.h" |
| 22 | #include "hw/virtio/virtio-bus.h" |
| 23 | |
| 24 | static inline void virtio_stw_p(VirtIODevice *vdev, void *ptr, uint16_t v) |
| 25 | { |
| 26 | if (virtio_vdev_is_big_endian(vdev)) { |
| 27 | stw_be_p(ptr, v); |
| 28 | } else { |
| 29 | stw_le_p(ptr, v); |
| 30 | } |
| 31 | } |
| 32 | |
| 33 | static inline void virtio_stl_p(VirtIODevice *vdev, void *ptr, uint32_t v) |
| 34 | { |
| 35 | if (virtio_vdev_is_big_endian(vdev)) { |
| 36 | stl_be_p(ptr, v); |
| 37 | } else { |
| 38 | stl_le_p(ptr, v); |
| 39 | } |
| 40 | } |
| 41 | |
| 42 | static inline void virtio_stq_p(VirtIODevice *vdev, void *ptr, uint64_t v) |
| 43 | { |
| 44 | if (virtio_vdev_is_big_endian(vdev)) { |
| 45 | stq_be_p(ptr, v); |
| 46 | } else { |
| 47 | stq_le_p(ptr, v); |
| 48 | } |
| 49 | } |
| 50 | |
| 51 | static inline int virtio_lduw_p(VirtIODevice *vdev, const void *ptr) |
| 52 | { |
| 53 | if (virtio_vdev_is_big_endian(vdev)) { |
| 54 | return lduw_be_p(ptr); |
| 55 | } else { |
| 56 | return lduw_le_p(ptr); |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | static inline int virtio_ldl_p(VirtIODevice *vdev, const void *ptr) |
| 61 | { |
| 62 | if (virtio_vdev_is_big_endian(vdev)) { |
| 63 | return ldl_be_p(ptr); |
| 64 | } else { |
| 65 | return ldl_le_p(ptr); |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | static inline uint64_t virtio_ldq_p(VirtIODevice *vdev, const void *ptr) |
| 70 | { |
| 71 | if (virtio_vdev_is_big_endian(vdev)) { |
| 72 | return ldq_be_p(ptr); |
| 73 | } else { |
| 74 | return ldq_le_p(ptr); |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | static inline uint16_t virtio_tswap16(VirtIODevice *vdev, uint16_t s) |
| 79 | { |
| 80 | #if HOST_BIG_ENDIAN |
| 81 | return virtio_vdev_is_big_endian(vdev) ? s : bswap16(s); |
| 82 | #else |
| 83 | return virtio_vdev_is_big_endian(vdev) ? bswap16(s) : s; |
| 84 | #endif |
| 85 | } |
| 86 | |
| 87 | static inline void virtio_tswap16s(VirtIODevice *vdev, uint16_t *s) |
| 88 | { |
| 89 | *s = virtio_tswap16(vdev, *s); |
| 90 | } |
| 91 | |
| 92 | static inline uint32_t virtio_tswap32(VirtIODevice *vdev, uint32_t s) |
| 93 | { |
| 94 | #if HOST_BIG_ENDIAN |
| 95 | return virtio_vdev_is_big_endian(vdev) ? s : bswap32(s); |
| 96 | #else |
| 97 | return virtio_vdev_is_big_endian(vdev) ? bswap32(s) : s; |
| 98 | #endif |
| 99 | } |
| 100 | |
| 101 | static inline void virtio_tswap32s(VirtIODevice *vdev, uint32_t *s) |
| 102 | { |
| 103 | *s = virtio_tswap32(vdev, *s); |
| 104 | } |
| 105 | |
| 106 | static inline uint64_t virtio_tswap64(VirtIODevice *vdev, uint64_t s) |
| 107 | { |
| 108 | #if HOST_BIG_ENDIAN |
| 109 | return virtio_vdev_is_big_endian(vdev) ? s : bswap64(s); |
| 110 | #else |
| 111 | return virtio_vdev_is_big_endian(vdev) ? bswap64(s) : s; |
| 112 | #endif |
| 113 | } |
| 114 | |
| 115 | static inline void virtio_tswap64s(VirtIODevice *vdev, uint64_t *s) |
| 116 | { |
| 117 | *s = virtio_tswap64(vdev, *s); |
| 118 | } |
| 119 | #endif /* QEMU_VIRTIO_ACCESS_H */ |