2 * Virtio Accessor Support: In case your target can change endian.
4 * Copyright IBM, Corp. 2013
7 * Rusty Russell <rusty@au.ibm.com>
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.
15 #ifndef _QEMU_VIRTIO_ACCESS_H
16 #define _QEMU_VIRTIO_ACCESS_H
17 #include "hw/virtio/virtio.h"
18 #include "exec/address-spaces.h"
20 static inline bool virtio_access_is_big_endian(VirtIODevice *vdev)
22 #if defined(TARGET_IS_BIENDIAN)
23 return virtio_is_big_endian(vdev);
24 #elif defined(TARGET_WORDS_BIGENDIAN)
25 if (virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1)) {
26 /* Devices conforming to VIRTIO 1.0 or later are always LE. */
35 static inline uint16_t virtio_lduw_phys(VirtIODevice *vdev, hwaddr pa)
37 if (virtio_access_is_big_endian(vdev)) {
38 return lduw_be_phys(&address_space_memory, pa);
40 return lduw_le_phys(&address_space_memory, pa);
43 static inline uint32_t virtio_ldl_phys(VirtIODevice *vdev, hwaddr pa)
45 if (virtio_access_is_big_endian(vdev)) {
46 return ldl_be_phys(&address_space_memory, pa);
48 return ldl_le_phys(&address_space_memory, pa);
51 static inline uint64_t virtio_ldq_phys(VirtIODevice *vdev, hwaddr pa)
53 if (virtio_access_is_big_endian(vdev)) {
54 return ldq_be_phys(&address_space_memory, pa);
56 return ldq_le_phys(&address_space_memory, pa);
59 static inline void virtio_stw_phys(VirtIODevice *vdev, hwaddr pa,
62 if (virtio_access_is_big_endian(vdev)) {
63 stw_be_phys(&address_space_memory, pa, value);
65 stw_le_phys(&address_space_memory, pa, value);
69 static inline void virtio_stl_phys(VirtIODevice *vdev, hwaddr pa,
72 if (virtio_access_is_big_endian(vdev)) {
73 stl_be_phys(&address_space_memory, pa, value);
75 stl_le_phys(&address_space_memory, pa, value);
79 static inline void virtio_stw_p(VirtIODevice *vdev, void *ptr, uint16_t v)
81 if (virtio_access_is_big_endian(vdev)) {
88 static inline void virtio_stl_p(VirtIODevice *vdev, void *ptr, uint32_t v)
90 if (virtio_access_is_big_endian(vdev)) {
97 static inline void virtio_stq_p(VirtIODevice *vdev, void *ptr, uint64_t v)
99 if (virtio_access_is_big_endian(vdev)) {
106 static inline int virtio_lduw_p(VirtIODevice *vdev, const void *ptr)
108 if (virtio_access_is_big_endian(vdev)) {
109 return lduw_be_p(ptr);
111 return lduw_le_p(ptr);
115 static inline int virtio_ldl_p(VirtIODevice *vdev, const void *ptr)
117 if (virtio_access_is_big_endian(vdev)) {
118 return ldl_be_p(ptr);
120 return ldl_le_p(ptr);
124 static inline uint64_t virtio_ldq_p(VirtIODevice *vdev, const void *ptr)
126 if (virtio_access_is_big_endian(vdev)) {
127 return ldq_be_p(ptr);
129 return ldq_le_p(ptr);
133 static inline uint16_t virtio_tswap16(VirtIODevice *vdev, uint16_t s)
135 #ifdef HOST_WORDS_BIGENDIAN
136 return virtio_access_is_big_endian(vdev) ? s : bswap16(s);
138 return virtio_access_is_big_endian(vdev) ? bswap16(s) : s;
142 static inline void virtio_tswap16s(VirtIODevice *vdev, uint16_t *s)
144 *s = virtio_tswap16(vdev, *s);
147 static inline uint32_t virtio_tswap32(VirtIODevice *vdev, uint32_t s)
149 #ifdef HOST_WORDS_BIGENDIAN
150 return virtio_access_is_big_endian(vdev) ? s : bswap32(s);
152 return virtio_access_is_big_endian(vdev) ? bswap32(s) : s;
156 static inline void virtio_tswap32s(VirtIODevice *vdev, uint32_t *s)
158 *s = virtio_tswap32(vdev, *s);
161 static inline uint64_t virtio_tswap64(VirtIODevice *vdev, uint64_t s)
163 #ifdef HOST_WORDS_BIGENDIAN
164 return virtio_access_is_big_endian(vdev) ? s : bswap64(s);
166 return virtio_access_is_big_endian(vdev) ? bswap64(s) : s;
170 static inline void virtio_tswap64s(VirtIODevice *vdev, uint64_t *s)
172 *s = virtio_tswap64(vdev, *s);
174 #endif /* _QEMU_VIRTIO_ACCESS_H */