Back in 2016, we discussed[1] rules for headers, and these were generally liked: 1. Have a carefully curated header that's included everywhere first. We got that already thanks to Peter: osdep.h. 2. Headers should normally include everything they need beyond osdep.h. If exceptions are needed for some reason, they must be documented in the header. If all that's needed from a header is typedefs, put those into qemu/typedefs.h instead of including the header. 3. Cyclic inclusion is forbidden. This patch gets include/ closer to obeying 2. It's actually extracted from my "[RFC] Baby steps towards saner headers" series[2], which demonstrates a possible path towards checking 2 automatically. It passes the RFC test there. [1] Message-ID: <87h9g8j57d.fsf@blackfin.pond.sub.org> https://lists.nongnu.org/archive/html/qemu-devel/2016-03/msg03345.html [2] Message-Id: <20190711122827.18970-1-armbru@redhat.com> https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg02715.html Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <20190812052359.30071-2-armbru@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
244 lines
6.3 KiB
C
244 lines
6.3 KiB
C
/*
|
|
* 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 */
|