diff options
Diffstat (limited to 'src/include/hw/virtio/virtio-access.h')
| -rw-r--r-- | src/include/hw/virtio/virtio-access.h | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/src/include/hw/virtio/virtio-access.h b/src/include/hw/virtio/virtio-access.h new file mode 100644 index 0000000..8aec843 --- /dev/null +++ b/src/include/hw/virtio/virtio-access.h @@ -0,0 +1,196 @@ +/* + * Virtio Accessor Support: In case your target can change endian. + * + * Copyright IBM, Corp. 2013 + * + * Authors: + * Rusty Russell <rusty@au.ibm.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + */ +#ifndef _QEMU_VIRTIO_ACCESS_H +#define _QEMU_VIRTIO_ACCESS_H +#include "hw/virtio/virtio.h" +#include "exec/address-spaces.h" + +static inline bool virtio_access_is_big_endian(VirtIODevice *vdev) +{ + if (virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1)) { + /* Devices conforming to VIRTIO 1.0 or later are always LE. */ + return false; + } +#if defined(TARGET_IS_BIENDIAN) + return virtio_is_big_endian(vdev); +#elif defined(TARGET_WORDS_BIGENDIAN) + return true; +#else + return false; +#endif +} + +static inline bool virtio_legacy_is_cross_endian(VirtIODevice *vdev) +{ +#ifdef TARGET_IS_BIENDIAN +#ifdef HOST_WORDS_BIGENDIAN + return !virtio_is_big_endian(vdev); +#else + return virtio_is_big_endian(vdev); +#endif +#else + return false; +#endif +} + +static inline uint16_t virtio_lduw_phys(VirtIODevice *vdev, hwaddr pa) +{ + if (virtio_access_is_big_endian(vdev)) { + return lduw_be_phys(&address_space_memory, pa); + } + return lduw_le_phys(&address_space_memory, pa); +} + +static inline uint32_t virtio_ldl_phys(VirtIODevice *vdev, hwaddr pa) +{ + if (virtio_access_is_big_endian(vdev)) { + return ldl_be_phys(&address_space_memory, pa); + } + return ldl_le_phys(&address_space_memory, pa); +} + +static inline uint64_t virtio_ldq_phys(VirtIODevice *vdev, hwaddr pa) +{ + if (virtio_access_is_big_endian(vdev)) { + return ldq_be_phys(&address_space_memory, pa); + } + return ldq_le_phys(&address_space_memory, pa); +} + +static inline void virtio_stw_phys(VirtIODevice *vdev, hwaddr pa, + uint16_t value) +{ + if (virtio_access_is_big_endian(vdev)) { + stw_be_phys(&address_space_memory, pa, value); + } else { + stw_le_phys(&address_space_memory, pa, value); + } +} + +static inline void virtio_stl_phys(VirtIODevice *vdev, hwaddr pa, + uint32_t value) +{ + if (virtio_access_is_big_endian(vdev)) { + stl_be_phys(&address_space_memory, pa, value); + } else { + stl_le_phys(&address_space_memory, pa, value); + } +} + +static inline void virtio_stw_p(VirtIODevice *vdev, void *ptr, uint16_t v) +{ + if (virtio_access_is_big_endian(vdev)) { + stw_be_p(ptr, v); + } else { + stw_le_p(ptr, v); + } +} + +static inline void virtio_stl_p(VirtIODevice *vdev, void *ptr, uint32_t v) +{ + if (virtio_access_is_big_endian(vdev)) { + stl_be_p(ptr, v); + } else { + stl_le_p(ptr, v); + } +} + +static inline void virtio_stq_p(VirtIODevice *vdev, void *ptr, uint64_t v) +{ + if (virtio_access_is_big_endian(vdev)) { + stq_be_p(ptr, v); + } else { + stq_le_p(ptr, v); + } +} + +static inline int virtio_lduw_p(VirtIODevice *vdev, const void *ptr) +{ + if (virtio_access_is_big_endian(vdev)) { + return lduw_be_p(ptr); + } else { + return lduw_le_p(ptr); + } +} + +static inline int virtio_ldl_p(VirtIODevice *vdev, const void *ptr) +{ + if (virtio_access_is_big_endian(vdev)) { + return ldl_be_p(ptr); + } else { + return ldl_le_p(ptr); + } +} + +static inline uint64_t virtio_ldq_p(VirtIODevice *vdev, const void *ptr) +{ + if (virtio_access_is_big_endian(vdev)) { + return ldq_be_p(ptr); + } else { + return ldq_le_p(ptr); + } +} + +static inline bool virtio_needs_swap(VirtIODevice *vdev) +{ +#ifdef HOST_WORDS_BIGENDIAN + return virtio_access_is_big_endian(vdev) ? false : true; +#else + return virtio_access_is_big_endian(vdev) ? true : false; +#endif +} + +static inline uint16_t virtio_tswap16(VirtIODevice *vdev, uint16_t s) +{ +#ifdef HOST_WORDS_BIGENDIAN + return virtio_access_is_big_endian(vdev) ? s : bswap16(s); +#else + return virtio_access_is_big_endian(vdev) ? bswap16(s) : s; +#endif +} + +static inline void virtio_tswap16s(VirtIODevice *vdev, uint16_t *s) +{ + *s = virtio_tswap16(vdev, *s); +} + +static inline uint32_t virtio_tswap32(VirtIODevice *vdev, uint32_t s) +{ +#ifdef HOST_WORDS_BIGENDIAN + return virtio_access_is_big_endian(vdev) ? s : bswap32(s); +#else + return virtio_access_is_big_endian(vdev) ? bswap32(s) : s; +#endif +} + +static inline void virtio_tswap32s(VirtIODevice *vdev, uint32_t *s) +{ + *s = virtio_tswap32(vdev, *s); +} + +static inline uint64_t virtio_tswap64(VirtIODevice *vdev, uint64_t s) +{ +#ifdef HOST_WORDS_BIGENDIAN + return virtio_access_is_big_endian(vdev) ? s : bswap64(s); +#else + return virtio_access_is_big_endian(vdev) ? bswap64(s) : s; +#endif +} + +static inline void virtio_tswap64s(VirtIODevice *vdev, uint64_t *s) +{ + *s = virtio_tswap64(vdev, *s); +} +#endif /* _QEMU_VIRTIO_ACCESS_H */ |
