/* * 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 "exec/hwaddr.h" #include "hw/virtio/virtio.h" #include "hw/virtio/virtio-bus.h" #if defined(TARGET_PPC64) || defined(TARGET_ARM) #define LEGACY_VIRTIO_IS_BIENDIAN 1 #endif static inline bool virtio_access_is_big_endian(VirtIODevice *vdev) { #if defined(LEGACY_VIRTIO_IS_BIENDIAN) return virtio_is_big_endian(vdev); #elif defined(TARGET_WORDS_BIGENDIAN) if (virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1)) { /* Devices conforming to VIRTIO 1.0 or later are always LE. */ return false; } return true; #else return false; #endif } static inline uint16_t virtio_lduw_phys(VirtIODevice *vdev, hwaddr pa) { AddressSpace *dma_as = vdev->dma_as; if (virtio_access_is_big_endian(vdev)) { return lduw_be_phys(dma_as, pa); } return lduw_le_phys(dma_as, pa); } static inline uint32_t virtio_ldl_phys(VirtIODevice *vdev, hwaddr pa) { AddressSpace *dma_as = vdev->dma_as; if (virtio_access_is_big_endian(vdev)) { return ldl_be_phys(dma_as, pa); } return ldl_le_phys(dma_as, pa); } static inline uint64_t virtio_ldq_phys(VirtIODevice *vdev, hwaddr pa) { AddressSpace *dma_as = vdev->dma_as; if (virtio_access_is_big_endian(vdev)) { return ldq_be_phys(dma_as, pa); } return ldq_le_phys(dma_as, pa); } static inline void virtio_stw_phys(VirtIODevice *vdev, hwaddr pa, uint16_t value) { AddressSpace *dma_as = vdev->dma_as; if (virtio_access_is_big_endian(vdev)) { stw_be_phys(dma_as, pa, value); } else { stw_le_phys(dma_as, pa, value); } } static inline void virtio_stl_phys(VirtIODevice *vdev, hwaddr pa, uint32_t value) { AddressSpace *dma_as = vdev->dma_as; if (virtio_access_is_big_endian(vdev)) { stl_be_phys(dma_as, pa, value); } else { stl_le_phys(dma_as, 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 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 uint16_t virtio_lduw_phys_cached(VirtIODevice *vdev, MemoryRegionCache *cache, hwaddr pa) { if (virtio_access_is_big_endian(vdev)) { return lduw_be_phys_cached(cache, pa); } return lduw_le_phys_cached(cache, pa); } static inline uint32_t virtio_ldl_phys_cached(VirtIODevice *vdev, MemoryRegionCache *cache, hwaddr pa) { if (virtio_access_is_big_endian(vdev)) { return ldl_be_phys_cached(cache, pa); } return ldl_le_phys_cached(cache, pa); } static inline uint64_t virtio_ldq_phys_cached(VirtIODevice *vdev, MemoryRegionCache *cache, hwaddr pa) { if (virtio_access_is_big_endian(vdev)) { return ldq_be_phys_cached(cache, pa); } return ldq_le_phys_cached(cache, pa); } static inline void virtio_stw_phys_cached(VirtIODevice *vdev, MemoryRegionCache *cache, hwaddr pa, uint16_t value) { if (virtio_access_is_big_endian(vdev)) { stw_be_phys_cached(cache, pa, value); } else { stw_le_phys_cached(cache, pa, value); } } static inline void virtio_stl_phys_cached(VirtIODevice *vdev, MemoryRegionCache *cache, hwaddr pa, uint32_t value) { if (virtio_access_is_big_endian(vdev)) { stl_be_phys_cached(cache, pa, value); } else { stl_le_phys_cached(cache, pa, value); } } 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 */