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| author | Frans Kaashoek <[email protected]> | 2022-08-02 11:44:40 -0400 |
|---|---|---|
| committer | Frans Kaashoek <[email protected]> | 2022-08-02 11:44:40 -0400 |
| commit | 84fb6f3dc2bf9d6fea6e21646352f74d063f432f (patch) | |
| tree | 0f5b79b299070a538edbec5f2ebbc626dde5cc44 /kernel/virtio.h | |
| parent | 1b02b08db18210f2c1efb4e184c482a06f690fbd (diff) | |
| parent | cd00a8233ad43be269908db5bdc28c5961a9dce9 (diff) | |
| download | xv6-labs-84fb6f3dc2bf9d6fea6e21646352f74d063f432f.tar.gz xv6-labs-84fb6f3dc2bf9d6fea6e21646352f74d063f432f.tar.bz2 xv6-labs-84fb6f3dc2bf9d6fea6e21646352f74d063f432f.zip | |
Merge branch 'virtio' into riscv
Diffstat (limited to 'kernel/virtio.h')
| -rw-r--r-- | kernel/virtio.h | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/kernel/virtio.h b/kernel/virtio.h index f1dc520..3d85583 100644 --- a/kernel/virtio.h +++ b/kernel/virtio.h @@ -2,7 +2,6 @@ // virtio device definitions. // for both the mmio interface, and virtio descriptors. // only tested with qemu. -// this is the "legacy" virtio interface. // // the virtio spec: // https://docs.oasis-open.org/virtio/virtio/v1.1/virtio-v1.1.pdf @@ -16,17 +15,20 @@ #define VIRTIO_MMIO_VENDOR_ID 0x00c // 0x554d4551 #define VIRTIO_MMIO_DEVICE_FEATURES 0x010 #define VIRTIO_MMIO_DRIVER_FEATURES 0x020 -#define VIRTIO_MMIO_GUEST_PAGE_SIZE 0x028 // page size for PFN, write-only #define VIRTIO_MMIO_QUEUE_SEL 0x030 // select queue, write-only #define VIRTIO_MMIO_QUEUE_NUM_MAX 0x034 // max size of current queue, read-only #define VIRTIO_MMIO_QUEUE_NUM 0x038 // size of current queue, write-only -#define VIRTIO_MMIO_QUEUE_ALIGN 0x03c // used ring alignment, write-only -#define VIRTIO_MMIO_QUEUE_PFN 0x040 // physical page number for queue, read/write #define VIRTIO_MMIO_QUEUE_READY 0x044 // ready bit #define VIRTIO_MMIO_QUEUE_NOTIFY 0x050 // write-only #define VIRTIO_MMIO_INTERRUPT_STATUS 0x060 // read-only #define VIRTIO_MMIO_INTERRUPT_ACK 0x064 // write-only #define VIRTIO_MMIO_STATUS 0x070 // read/write +#define VIRTIO_MMIO_QUEUE_DESC_LOW 0x080 // physical address for descriptor table, write-only +#define VIRTIO_MMIO_QUEUE_DESC_HIGH 0x084 +#define VIRTIO_MMIO_DRIVER_DESC_LOW 0x090 // physical address for available ring, write-only +#define VIRTIO_MMIO_DRIVER_DESC_HIGH 0x094 +#define VIRTIO_MMIO_DEVICE_DESC_LOW 0x0a0 // physical address for used ring, write-only +#define VIRTIO_MMIO_DEVICE_DESC_HIGH 0x0a4 // status register bits, from qemu virtio_config.h #define VIRTIO_CONFIG_S_ACKNOWLEDGE 1 |