virtio: memory accessors for endian-ambivalent targets
[qemu/ar7.git] / include / hw / virtio / virtio-access.h
blob46456fd9dae5d059acf8d65de9adc7dff39b1306
1 /*
2 * Virtio Accessor Support: In case your target can change endian.
4 * Copyright IBM, Corp. 2013
6 * Authors:
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 return true;
26 #else
27 return false;
28 #endif
31 static inline uint16_t virtio_lduw_phys(VirtIODevice *vdev, hwaddr pa)
33 if (virtio_access_is_big_endian(vdev)) {
34 return lduw_be_phys(&address_space_memory, pa);
36 return lduw_le_phys(&address_space_memory, pa);
39 static inline uint32_t virtio_ldl_phys(VirtIODevice *vdev, hwaddr pa)
41 if (virtio_access_is_big_endian(vdev)) {
42 return ldl_be_phys(&address_space_memory, pa);
44 return ldl_le_phys(&address_space_memory, pa);
47 static inline uint64_t virtio_ldq_phys(VirtIODevice *vdev, hwaddr pa)
49 if (virtio_access_is_big_endian(vdev)) {
50 return ldq_be_phys(&address_space_memory, pa);
52 return ldq_le_phys(&address_space_memory, pa);
55 static inline void virtio_stw_phys(VirtIODevice *vdev, hwaddr pa,
56 uint16_t value)
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);
65 static inline void virtio_stl_phys(VirtIODevice *vdev, hwaddr pa,
66 uint32_t value)
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);
75 static inline void virtio_stw_p(VirtIODevice *vdev, void *ptr, uint16_t v)
77 if (virtio_access_is_big_endian(vdev)) {
78 stw_be_p(ptr, v);
79 } else {
80 stw_le_p(ptr, v);
84 static inline void virtio_stl_p(VirtIODevice *vdev, void *ptr, uint32_t v)
86 if (virtio_access_is_big_endian(vdev)) {
87 stl_be_p(ptr, v);
88 } else {
89 stl_le_p(ptr, v);
93 static inline void virtio_stq_p(VirtIODevice *vdev, void *ptr, uint64_t v)
95 if (virtio_access_is_big_endian(vdev)) {
96 stq_be_p(ptr, v);
97 } else {
98 stq_le_p(ptr, v);
102 static inline int virtio_lduw_p(VirtIODevice *vdev, const void *ptr)
104 if (virtio_access_is_big_endian(vdev)) {
105 return lduw_be_p(ptr);
106 } else {
107 return lduw_le_p(ptr);
111 static inline int virtio_ldl_p(VirtIODevice *vdev, const void *ptr)
113 if (virtio_access_is_big_endian(vdev)) {
114 return ldl_be_p(ptr);
115 } else {
116 return ldl_le_p(ptr);
120 static inline uint64_t virtio_ldq_p(VirtIODevice *vdev, const void *ptr)
122 if (virtio_access_is_big_endian(vdev)) {
123 return ldq_be_p(ptr);
124 } else {
125 return ldq_le_p(ptr);
129 static inline uint16_t virtio_tswap16(VirtIODevice *vdev, uint16_t s)
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
138 static inline void virtio_tswap16s(VirtIODevice *vdev, uint16_t *s)
140 *s = virtio_tswap16(vdev, *s);
143 static inline uint32_t virtio_tswap32(VirtIODevice *vdev, uint32_t s)
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
152 static inline void virtio_tswap32s(VirtIODevice *vdev, uint32_t *s)
154 *s = virtio_tswap32(vdev, *s);
157 static inline uint64_t virtio_tswap64(VirtIODevice *vdev, uint64_t s)
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
166 static inline void virtio_tswap64s(VirtIODevice *vdev, uint64_t *s)
168 *s = virtio_tswap64(vdev, *s);
170 #endif /* _QEMU_VIRTIO_ACCESS_H */