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 #ifndef _QEMU_VIRTIO_ACCESS_H 16 #define _QEMU_VIRTIO_ACCESS_H 17 #include "hw/virtio/virtio.h" 18 #include "exec/address-spaces.h" 19 20 static inline bool virtio_access_is_big_endian(VirtIODevice *vdev) 21 { 22 #if defined(TARGET_IS_BIENDIAN) 23 return virtio_is_big_endian(vdev); 24 #elif defined(TARGET_WORDS_BIGENDIAN) 25 return true; 26 #else 27 return false; 28 #endif 29 } 30 31 static inline uint16_t virtio_lduw_phys(VirtIODevice *vdev, hwaddr pa) 32 { 33 if (virtio_access_is_big_endian(vdev)) { 34 return lduw_be_phys(&address_space_memory, pa); 35 } 36 return lduw_le_phys(&address_space_memory, pa); 37 } 38 39 static inline uint32_t virtio_ldl_phys(VirtIODevice *vdev, hwaddr pa) 40 { 41 if (virtio_access_is_big_endian(vdev)) { 42 return ldl_be_phys(&address_space_memory, pa); 43 } 44 return ldl_le_phys(&address_space_memory, pa); 45 } 46 47 static inline uint64_t virtio_ldq_phys(VirtIODevice *vdev, hwaddr pa) 48 { 49 if (virtio_access_is_big_endian(vdev)) { 50 return ldq_be_phys(&address_space_memory, pa); 51 } 52 return ldq_le_phys(&address_space_memory, pa); 53 } 54 55 static inline void virtio_stw_phys(VirtIODevice *vdev, hwaddr pa, 56 uint16_t value) 57 { 58 if (virtio_access_is_big_endian(vdev)) { 59 stw_be_phys(&address_space_memory, pa, value); 60 } else { 61 stw_le_phys(&address_space_memory, pa, value); 62 } 63 } 64 65 static inline void virtio_stl_phys(VirtIODevice *vdev, hwaddr pa, 66 uint32_t value) 67 { 68 if (virtio_access_is_big_endian(vdev)) { 69 stl_be_phys(&address_space_memory, pa, value); 70 } else { 71 stl_le_phys(&address_space_memory, pa, value); 72 } 73 } 74 75 static inline void virtio_stw_p(VirtIODevice *vdev, void *ptr, uint16_t v) 76 { 77 if (virtio_access_is_big_endian(vdev)) { 78 stw_be_p(ptr, v); 79 } else { 80 stw_le_p(ptr, v); 81 } 82 } 83 84 static inline void virtio_stl_p(VirtIODevice *vdev, void *ptr, uint32_t v) 85 { 86 if (virtio_access_is_big_endian(vdev)) { 87 stl_be_p(ptr, v); 88 } else { 89 stl_le_p(ptr, v); 90 } 91 } 92 93 static inline void virtio_stq_p(VirtIODevice *vdev, void *ptr, uint64_t v) 94 { 95 if (virtio_access_is_big_endian(vdev)) { 96 stq_be_p(ptr, v); 97 } else { 98 stq_le_p(ptr, v); 99 } 100 } 101 102 static inline int virtio_lduw_p(VirtIODevice *vdev, const void *ptr) 103 { 104 if (virtio_access_is_big_endian(vdev)) { 105 return lduw_be_p(ptr); 106 } else { 107 return lduw_le_p(ptr); 108 } 109 } 110 111 static inline int virtio_ldl_p(VirtIODevice *vdev, const void *ptr) 112 { 113 if (virtio_access_is_big_endian(vdev)) { 114 return ldl_be_p(ptr); 115 } else { 116 return ldl_le_p(ptr); 117 } 118 } 119 120 static inline uint64_t virtio_ldq_p(VirtIODevice *vdev, const void *ptr) 121 { 122 if (virtio_access_is_big_endian(vdev)) { 123 return ldq_be_p(ptr); 124 } else { 125 return ldq_le_p(ptr); 126 } 127 } 128 129 static inline uint16_t virtio_tswap16(VirtIODevice *vdev, uint16_t s) 130 { 131 #ifdef HOST_WORDS_BIGENDIAN 132 return virtio_access_is_big_endian(vdev) ? s : bswap16(s); 133 #else 134 return virtio_access_is_big_endian(vdev) ? bswap16(s) : s; 135 #endif 136 } 137 138 static inline void virtio_tswap16s(VirtIODevice *vdev, uint16_t *s) 139 { 140 *s = virtio_tswap16(vdev, *s); 141 } 142 143 static inline uint32_t virtio_tswap32(VirtIODevice *vdev, uint32_t s) 144 { 145 #ifdef HOST_WORDS_BIGENDIAN 146 return virtio_access_is_big_endian(vdev) ? s : bswap32(s); 147 #else 148 return virtio_access_is_big_endian(vdev) ? bswap32(s) : s; 149 #endif 150 } 151 152 static inline void virtio_tswap32s(VirtIODevice *vdev, uint32_t *s) 153 { 154 *s = virtio_tswap32(vdev, *s); 155 } 156 157 static inline uint64_t virtio_tswap64(VirtIODevice *vdev, uint64_t s) 158 { 159 #ifdef HOST_WORDS_BIGENDIAN 160 return virtio_access_is_big_endian(vdev) ? s : bswap64(s); 161 #else 162 return virtio_access_is_big_endian(vdev) ? bswap64(s) : s; 163 #endif 164 } 165 166 static inline void virtio_tswap64s(VirtIODevice *vdev, uint64_t *s) 167 { 168 *s = virtio_tswap64(vdev, *s); 169 } 170 #endif /* _QEMU_VIRTIO_ACCESS_H */ 171