ppc/pnv: Add a HIOMAP erase command
[qemu.git] / include / hw / virtio / virtio-access.h
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 "hw/virtio/virtio.h"
21 #include "hw/virtio/virtio-bus.h"
22
23 #if defined(TARGET_PPC64) || defined(TARGET_ARM)
24 #define LEGACY_VIRTIO_IS_BIENDIAN 1
25 #endif
26
27 static inline bool virtio_access_is_big_endian(VirtIODevice *vdev)
28 {
29 #if defined(LEGACY_VIRTIO_IS_BIENDIAN)
30 return virtio_is_big_endian(vdev);
31 #elif defined(TARGET_WORDS_BIGENDIAN)
32 if (virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1)) {
33 /* Devices conforming to VIRTIO 1.0 or later are always LE. */
34 return false;
35 }
36 return true;
37 #else
38 return false;
39 #endif
40 }
41
42 static inline uint16_t virtio_lduw_phys(VirtIODevice *vdev, hwaddr pa)
43 {
44 AddressSpace *dma_as = vdev->dma_as;
45
46 if (virtio_access_is_big_endian(vdev)) {
47 return lduw_be_phys(dma_as, pa);
48 }
49 return lduw_le_phys(dma_as, pa);
50 }
51
52 static inline uint32_t virtio_ldl_phys(VirtIODevice *vdev, hwaddr pa)
53 {
54 AddressSpace *dma_as = vdev->dma_as;
55
56 if (virtio_access_is_big_endian(vdev)) {
57 return ldl_be_phys(dma_as, pa);
58 }
59 return ldl_le_phys(dma_as, pa);
60 }
61
62 static inline uint64_t virtio_ldq_phys(VirtIODevice *vdev, hwaddr pa)
63 {
64 AddressSpace *dma_as = vdev->dma_as;
65
66 if (virtio_access_is_big_endian(vdev)) {
67 return ldq_be_phys(dma_as, pa);
68 }
69 return ldq_le_phys(dma_as, pa);
70 }
71
72 static inline void virtio_stw_phys(VirtIODevice *vdev, hwaddr pa,
73 uint16_t value)
74 {
75 AddressSpace *dma_as = vdev->dma_as;
76
77 if (virtio_access_is_big_endian(vdev)) {
78 stw_be_phys(dma_as, pa, value);
79 } else {
80 stw_le_phys(dma_as, pa, value);
81 }
82 }
83
84 static inline void virtio_stl_phys(VirtIODevice *vdev, hwaddr pa,
85 uint32_t value)
86 {
87 AddressSpace *dma_as = vdev->dma_as;
88
89 if (virtio_access_is_big_endian(vdev)) {
90 stl_be_phys(dma_as, pa, value);
91 } else {
92 stl_le_phys(dma_as, pa, value);
93 }
94 }
95
96 static inline void virtio_stw_p(VirtIODevice *vdev, void *ptr, uint16_t v)
97 {
98 if (virtio_access_is_big_endian(vdev)) {
99 stw_be_p(ptr, v);
100 } else {
101 stw_le_p(ptr, v);
102 }
103 }
104
105 static inline void virtio_stl_p(VirtIODevice *vdev, void *ptr, uint32_t v)
106 {
107 if (virtio_access_is_big_endian(vdev)) {
108 stl_be_p(ptr, v);
109 } else {
110 stl_le_p(ptr, v);
111 }
112 }
113
114 static inline void virtio_stq_p(VirtIODevice *vdev, void *ptr, uint64_t v)
115 {
116 if (virtio_access_is_big_endian(vdev)) {
117 stq_be_p(ptr, v);
118 } else {
119 stq_le_p(ptr, v);
120 }
121 }
122
123 static inline int virtio_lduw_p(VirtIODevice *vdev, const void *ptr)
124 {
125 if (virtio_access_is_big_endian(vdev)) {
126 return lduw_be_p(ptr);
127 } else {
128 return lduw_le_p(ptr);
129 }
130 }
131
132 static inline int virtio_ldl_p(VirtIODevice *vdev, const void *ptr)
133 {
134 if (virtio_access_is_big_endian(vdev)) {
135 return ldl_be_p(ptr);
136 } else {
137 return ldl_le_p(ptr);
138 }
139 }
140
141 static inline uint64_t virtio_ldq_p(VirtIODevice *vdev, const void *ptr)
142 {
143 if (virtio_access_is_big_endian(vdev)) {
144 return ldq_be_p(ptr);
145 } else {
146 return ldq_le_p(ptr);
147 }
148 }
149
150 static inline uint16_t virtio_tswap16(VirtIODevice *vdev, uint16_t s)
151 {
152 #ifdef HOST_WORDS_BIGENDIAN
153 return virtio_access_is_big_endian(vdev) ? s : bswap16(s);
154 #else
155 return virtio_access_is_big_endian(vdev) ? bswap16(s) : s;
156 #endif
157 }
158
159 static inline uint16_t virtio_lduw_phys_cached(VirtIODevice *vdev,
160 MemoryRegionCache *cache,
161 hwaddr pa)
162 {
163 if (virtio_access_is_big_endian(vdev)) {
164 return lduw_be_phys_cached(cache, pa);
165 }
166 return lduw_le_phys_cached(cache, pa);
167 }
168
169 static inline uint32_t virtio_ldl_phys_cached(VirtIODevice *vdev,
170 MemoryRegionCache *cache,
171 hwaddr pa)
172 {
173 if (virtio_access_is_big_endian(vdev)) {
174 return ldl_be_phys_cached(cache, pa);
175 }
176 return ldl_le_phys_cached(cache, pa);
177 }
178
179 static inline uint64_t virtio_ldq_phys_cached(VirtIODevice *vdev,
180 MemoryRegionCache *cache,
181 hwaddr pa)
182 {
183 if (virtio_access_is_big_endian(vdev)) {
184 return ldq_be_phys_cached(cache, pa);
185 }
186 return ldq_le_phys_cached(cache, pa);
187 }
188
189 static inline void virtio_stw_phys_cached(VirtIODevice *vdev,
190 MemoryRegionCache *cache,
191 hwaddr pa, uint16_t value)
192 {
193 if (virtio_access_is_big_endian(vdev)) {
194 stw_be_phys_cached(cache, pa, value);
195 } else {
196 stw_le_phys_cached(cache, pa, value);
197 }
198 }
199
200 static inline void virtio_stl_phys_cached(VirtIODevice *vdev,
201 MemoryRegionCache *cache,
202 hwaddr pa, uint32_t value)
203 {
204 if (virtio_access_is_big_endian(vdev)) {
205 stl_be_phys_cached(cache, pa, value);
206 } else {
207 stl_le_phys_cached(cache, pa, value);
208 }
209 }
210
211 static inline void virtio_tswap16s(VirtIODevice *vdev, uint16_t *s)
212 {
213 *s = virtio_tswap16(vdev, *s);
214 }
215
216 static inline uint32_t virtio_tswap32(VirtIODevice *vdev, uint32_t s)
217 {
218 #ifdef HOST_WORDS_BIGENDIAN
219 return virtio_access_is_big_endian(vdev) ? s : bswap32(s);
220 #else
221 return virtio_access_is_big_endian(vdev) ? bswap32(s) : s;
222 #endif
223 }
224
225 static inline void virtio_tswap32s(VirtIODevice *vdev, uint32_t *s)
226 {
227 *s = virtio_tswap32(vdev, *s);
228 }
229
230 static inline uint64_t virtio_tswap64(VirtIODevice *vdev, uint64_t s)
231 {
232 #ifdef HOST_WORDS_BIGENDIAN
233 return virtio_access_is_big_endian(vdev) ? s : bswap64(s);
234 #else
235 return virtio_access_is_big_endian(vdev) ? bswap64(s) : s;
236 #endif
237 }
238
239 static inline void virtio_tswap64s(VirtIODevice *vdev, uint64_t *s)
240 {
241 *s = virtio_tswap64(vdev, *s);
242 }
243 #endif /* QEMU_VIRTIO_ACCESS_H */