diff options
Diffstat (limited to 'kernel/virtio.h')
-rw-r--r-- | kernel/virtio.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/kernel/virtio.h b/kernel/virtio.h index c142af9..03b53a9 100644 --- a/kernel/virtio.h +++ b/kernel/virtio.h @@ -43,6 +43,10 @@ #define VIRTIO_RING_F_INDIRECT_DESC 28 #define VIRTIO_RING_F_EVENT_IDX 29 +// this many virtio descriptors. +// must be a power of two. +#define NUM 8 + struct VRingDesc { uint64 addr; uint32 len; @@ -60,3 +64,9 @@ struct VRingUsedElem { // for disk ops #define VIRTIO_BLK_T_IN 0 // read the disk #define VIRTIO_BLK_T_OUT 1 // write the disk + +struct UsedArea { + uint16 flags; + uint16 id; + struct VRingUsedElem elems[NUM]; +}; |