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Diffstat (limited to 'include/drivers/virtio.h')
| -rw-r--r-- | include/drivers/virtio.h | 108 |
1 files changed, 0 insertions, 108 deletions
diff --git a/include/drivers/virtio.h b/include/drivers/virtio.h deleted file mode 100644 index 9fda8cf..0000000 --- a/include/drivers/virtio.h +++ /dev/null @@ -1,108 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * Copyright (C) 2026 Richard QIn - */ - -#pragma once -#include "common/types.h" - -// VirtIO MMIO Base Address -#define VIRTIO0 0x10001000 - -// MMIO Registers (Modern / Version 2) -#define VIRTIO_MMIO_MAGIC_VALUE 0x000 -#define VIRTIO_MMIO_VERSION 0x004 -#define VIRTIO_MMIO_DEVICE_ID 0x008 -#define VIRTIO_MMIO_VENDOR_ID 0x00c -#define VIRTIO_MMIO_DEVICE_FEATURES 0x010 -#define VIRTIO_MMIO_DEVICE_FEATURES_SEL 0x014 -#define VIRTIO_MMIO_DRIVER_FEATURES 0x020 -#define VIRTIO_MMIO_DRIVER_FEATURES_SEL 0x024 -#define VIRTIO_MMIO_QUEUE_SEL 0x030 -#define VIRTIO_MMIO_QUEUE_NUM_MAX 0x034 -#define VIRTIO_MMIO_QUEUE_NUM 0x038 -#define VIRTIO_MMIO_QUEUE_READY 0x044 -#define VIRTIO_MMIO_QUEUE_NOTIFY 0x050 -#define VIRTIO_MMIO_INTERRUPT_STATUS 0x060 -#define VIRTIO_MMIO_INTERRUPT_ACK 0x064 -#define VIRTIO_MMIO_STATUS 0x070 - -// 64-bit Queue Address Registers (Modern) -#define VIRTIO_MMIO_QUEUE_DESC_LOW 0x080 -#define VIRTIO_MMIO_QUEUE_DESC_HIGH 0x084 -#define VIRTIO_MMIO_QUEUE_DRIVER_LOW 0x090 -#define VIRTIO_MMIO_QUEUE_DRIVER_HIGH 0x094 -#define VIRTIO_MMIO_QUEUE_DEVICE_LOW 0x0a0 -#define VIRTIO_MMIO_QUEUE_DEVICE_HIGH 0x0a4 - -// Status Bits -#define VIRTIO_CONFIG_S_ACKNOWLEDGE 1 -#define VIRTIO_CONFIG_S_DRIVER 2 -#define VIRTIO_CONFIG_S_DRIVER_OK 4 -#define VIRTIO_CONFIG_S_FEATURES_OK 8 - -// Feature Bits -#define VIRTIO_BLK_F_RO 5 -#define VIRTIO_BLK_F_SCSI 7 -#define VIRTIO_BLK_F_CONFIG_WCE 11 -#define VIRTIO_BLK_F_MQ 12 -#define VIRTIO_F_ANY_LAYOUT 27 -#define VIRTIO_RING_F_INDIRECT_DESC 28 -#define VIRTIO_RING_F_EVENT_IDX 29 -#define VIRTIO_F_VERSION_1 32 - -// Descriptor Flags -#define VRING_DESC_F_NEXT 1 -#define VRING_DESC_F_WRITE 2 - -#define NUM_DESCS 8 - -#define VIRTIO_BLK_T_IN 0 -#define VIRTIO_BLK_T_OUT 1 - -// Device Configuration Layout (Offset 0x100) -#define VIRTIO_MMIO_CONFIG 0x100 - -namespace VirtIO -{ - struct VRingDesc - { - uint64 addr; - uint32 len; - uint16 flags; - uint16 next; - }; - - struct VRingAvail - { - uint16 flags; - uint16 idx; - uint16 ring[NUM_DESCS]; - }; - - struct VRingUsedElem - { - uint32 id; - uint32 len; - }; - - struct VRingUsed - { - uint16 flags; - uint16 idx; - struct VRingUsedElem ring[NUM_DESCS]; - }; - - struct __attribute__((packed)) BlockRequest - { - uint32 type; // 0=Read, 1=Write - uint32 reserved; - uint64 sector; - }; - - void init(); - void intr(); - void rw(int write, uint64 blockno, char *buf); - void test_rw(); - void test_bio(); -}
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