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473
System/Drivers/Virtio-blk.HC
Normal file
473
System/Drivers/Virtio-blk.HC
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// Virtio.HC
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//
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// PCI virtio I/O registers.
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//
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#define VIRTIO_PCI_HOST_FEATURES 0 // Features supported by the host
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#define VIRTIO_PCI_GUEST_FEATURES 4 // Features activated by the guest
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#define VIRTIO_PCI_QUEUE_PFN 8 // PFN for the currently selected queue
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#define VIRTIO_PCI_QUEUE_SIZE 12 // Queue size for the currently selected queue
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#define VIRTIO_PCI_QUEUE_SEL 14 // Queue selector
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#define VIRTIO_PCI_QUEUE_NOTIFY 16 // Queue notifier
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#define VIRTIO_PCI_STATUS 18 // Device status register
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#define VIRTIO_PCI_ISR 19 // Interrupt status register
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#define VIRTIO_PCI_CONFIG 20 // Configuration data block
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//
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// PCI virtio status register bits
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//
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#define VIRTIO_CONFIG_S_ACKNOWLEDGE 1
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#define VIRTIO_CONFIG_S_DRIVER 2
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#define VIRTIO_CONFIG_S_DRIVER_OK 4
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#define VIRTIO_CONFIG_S_FAILED 0x80
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//
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// Ring descriptor flags
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//
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#define VRING_DESC_F_NEXT 1 // Buffer continues via the next field
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#define VRING_DESC_F_WRITE 2 // Buffer is write-only (otherwise read-only)
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#define VRING_DESC_F_INDIRECT 4 // Buffer contains a list of buffer descriptors
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class @virtio_queue_buf
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{
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U64 address;
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U32 length;
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U16 flags;
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U16 next;
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};
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class @virtio_avail
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{
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U16 flags;
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U16 index;
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U16 ring[256];
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U16 int_index;
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};
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class @virtio_used_item
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{
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U32 index;
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U32 length;
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};
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class @virtio_used
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{
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U16 flags;
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U16 index;
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@virtio_used_item ring[256];
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U16 int_index;
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};
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class @virtio_queue
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{
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@virtio_queue_buf buffers[256];
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@virtio_avail available;
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U8 padding[3578];
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@virtio_used used;
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};
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class @virtio_avail_buf
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{
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U32 index;
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U64 address;
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U32 length;
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};
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class @virtio_buf_info
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{
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U8* buffer;
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U64 size;
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U8 flags;
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// If the user wants to keep same buffer as passed in this struct, use "true".
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// otherwise, the supplied buffer will be copied in the queues' buffer
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Bool copy;
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};
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// Virtio-blk.HC
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#define BDT_VIRTIO_BLK 10
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#define VIRTIO_BLK_T_IN 0
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#define VIRTIO_BLK_T_OUT 1
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#define VIRTIO_BLK_T_FLUSH 4
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#define VIRTIO_BLK_MAX_BLK 0x400000 // Limit blkdev to 2G max, set to NULL to use entire disk (not recommended for RedSea)
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class @virtio_blk
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{
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U16 port;
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U32 blks;
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@virtio_queue* vq;
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I64 vq_size;
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I64 vq_index;
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U8 status;
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};
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class @virtio_blk_request
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{
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U32 type;
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U32 priority;
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U64 sector;
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};
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@virtio_blk virtio_blk;
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MemSet(&virtio_blk, 0, sizeof(@virtio_blk));
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I64 VirtioBlkInit()
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{
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I64 j;
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// Scan for device
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j = PCIClassFind(0x010000, 0);
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if (j < 0) {
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"\n[virtio-blk] No device found\n";
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return -1;
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}
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virtio_blk.port = PCIReadU32(j.u8[2],
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j.u8[1], j.u8[0], 0x10)
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& 0xFFFFFFFC;
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virtio_blk.blks = InU32(virtio_blk.port + VIRTIO_PCI_CONFIG);
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// Reset Device
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OutU8(virtio_blk.port + VIRTIO_PCI_STATUS, 0);
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// Found Driver
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OutU8(virtio_blk.port + VIRTIO_PCI_STATUS, InU8(virtio_blk.port + VIRTIO_PCI_STATUS) | VIRTIO_CONFIG_S_ACKNOWLEDGE | VIRTIO_CONFIG_S_DRIVER);
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// Set up virt queue
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OutU16(virtio_blk.port + VIRTIO_PCI_QUEUE_SEL, 0);
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virtio_blk.vq_size = InU16(virtio_blk.port + VIRTIO_PCI_QUEUE_SIZE); // 256
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virtio_blk.vq = CAllocAligned(sizeof(@virtio_queue), 4096, adam_task->code_heap);
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OutU32(virtio_blk.port + VIRTIO_PCI_QUEUE_PFN, virtio_blk.vq / 4096);
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// Init OK
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OutU8(virtio_blk.port + VIRTIO_PCI_STATUS, InU8(virtio_blk.port + VIRTIO_PCI_STATUS) | VIRTIO_CONFIG_S_DRIVER_OK);
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virtio_blk.vq_index = 0;
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}
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// DskVIO.HC
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U0 VIOFlush()
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{
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I64 j;
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I64 vq_idx;
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@virtio_blk_request* brq = CAlloc(sizeof(@virtio_blk_request), adam_task);
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brq->type = VIRTIO_BLK_T_FLUSH;
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brq->sector = NULL;
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vq_idx = virtio_blk.vq->available.index % 256;
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virtio_blk.vq->buffers[virtio_blk.vq_index % 256].address = brq;
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virtio_blk.vq->buffers[virtio_blk.vq_index % 256].length = sizeof(@virtio_blk_request);
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virtio_blk.vq->buffers[virtio_blk.vq_index % 256].flags = VRING_DESC_F_NEXT;
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virtio_blk.vq->buffers[virtio_blk.vq_index % 256].next = (virtio_blk.vq_index + 1) % 256;
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virtio_blk.vq->buffers[(virtio_blk.vq_index + 1) % 256].address = &virtio_blk.status;
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virtio_blk.vq->buffers[(virtio_blk.vq_index + 1) % 256].length = 1;
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virtio_blk.vq->buffers[(virtio_blk.vq_index + 1) % 256].flags = VRING_DESC_F_WRITE;
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virtio_blk.vq->buffers[(virtio_blk.vq_index + 1) % 256].next = 0;
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virtio_blk.vq->available.ring[vq_idx] = virtio_blk.vq_index % 256;
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virtio_blk.vq_index += 2;
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j = virtio_blk.vq->used.index;
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virtio_blk.vq->available.index++;
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OutU16(virtio_blk.port + VIRTIO_PCI_QUEUE_NOTIFY, 0);
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while (j == virtio_blk.vq->used.index) {
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Yield;
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}
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Free(brq);
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}
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Bool VIORBlks(CDrv* dv, U8* buf, I64 blk, I64 cnt)
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{
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no_warn dv;
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I64 i, j;
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I64 vq_idx;
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U64 addr;
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@virtio_blk_request* brq = CAlloc(sizeof(@virtio_blk_request), adam_task);
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for (i = 0; i < cnt; i++) {
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brq->type = VIRTIO_BLK_T_IN;
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brq->sector = blk + i;
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vq_idx = virtio_blk.vq->available.index % 256;
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addr = buf + (BLK_SIZE * i);
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virtio_blk.vq->buffers[virtio_blk.vq_index % 256].address = brq;
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virtio_blk.vq->buffers[virtio_blk.vq_index % 256].length = sizeof(@virtio_blk_request);
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virtio_blk.vq->buffers[virtio_blk.vq_index % 256].flags = VRING_DESC_F_NEXT;
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virtio_blk.vq->buffers[virtio_blk.vq_index % 256].next = (virtio_blk.vq_index + 1) % 256;
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virtio_blk.vq->buffers[(virtio_blk.vq_index + 1) % 256].address = addr;
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virtio_blk.vq->buffers[(virtio_blk.vq_index + 1) % 256].length = BLK_SIZE;
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virtio_blk.vq->buffers[(virtio_blk.vq_index + 1) % 256].flags = VRING_DESC_F_WRITE | VRING_DESC_F_NEXT;
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virtio_blk.vq->buffers[(virtio_blk.vq_index + 1) % 256].next = (virtio_blk.vq_index + 2) % 256;
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virtio_blk.vq->buffers[(virtio_blk.vq_index + 2) % 256].address = &virtio_blk.status;
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virtio_blk.vq->buffers[(virtio_blk.vq_index + 2) % 256].length = 1;
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virtio_blk.vq->buffers[(virtio_blk.vq_index + 2) % 256].flags = VRING_DESC_F_WRITE;
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virtio_blk.vq->buffers[(virtio_blk.vq_index + 2) % 256].next = 0;
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virtio_blk.vq->available.ring[vq_idx] = virtio_blk.vq_index % 256;
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virtio_blk.vq_index += 3;
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j = virtio_blk.vq->used.index;
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virtio_blk.vq->available.index++;
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OutU16(virtio_blk.port + VIRTIO_PCI_QUEUE_NOTIFY, 0);
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while (j == virtio_blk.vq->used.index) {
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Yield;
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}
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}
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Free(brq);
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return TRUE;
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}
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Bool VIOWBlks(CDrv* dv, U8* buf, I64 blk, I64 cnt)
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{
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no_warn dv;
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I64 i, j;
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I64 vq_idx;
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U64 addr;
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@virtio_blk_request* brq = CAlloc(sizeof(@virtio_blk_request), adam_task);
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for (i = 0; i < cnt; i++) {
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brq->type = VIRTIO_BLK_T_OUT;
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brq->sector = blk + i;
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vq_idx = virtio_blk.vq->available.index % 256;
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addr = buf + (BLK_SIZE * i);
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virtio_blk.vq->buffers[virtio_blk.vq_index % 256].address = brq;
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virtio_blk.vq->buffers[virtio_blk.vq_index % 256].length = sizeof(@virtio_blk_request);
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virtio_blk.vq->buffers[virtio_blk.vq_index % 256].flags = VRING_DESC_F_NEXT;
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virtio_blk.vq->buffers[virtio_blk.vq_index % 256].next = (virtio_blk.vq_index + 1) % 256;
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virtio_blk.vq->buffers[(virtio_blk.vq_index + 1) % 256].address = addr;
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virtio_blk.vq->buffers[(virtio_blk.vq_index + 1) % 256].length = BLK_SIZE;
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virtio_blk.vq->buffers[(virtio_blk.vq_index + 1) % 256].flags = VRING_DESC_F_NEXT;
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virtio_blk.vq->buffers[(virtio_blk.vq_index + 1) % 256].next = (virtio_blk.vq_index + 2) % 256;
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virtio_blk.vq->buffers[(virtio_blk.vq_index + 2) % 256].address = &virtio_blk.status;
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virtio_blk.vq->buffers[(virtio_blk.vq_index + 2) % 256].length = 1;
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virtio_blk.vq->buffers[(virtio_blk.vq_index + 2) % 256].flags = VRING_DESC_F_WRITE;
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virtio_blk.vq->buffers[(virtio_blk.vq_index + 2) % 256].next = 0;
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virtio_blk.vq->available.ring[vq_idx] = virtio_blk.vq_index % 256;
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virtio_blk.vq_index += 3;
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j = virtio_blk.vq->used.index;
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virtio_blk.vq->available.index++;
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OutU16(virtio_blk.port + VIRTIO_PCI_QUEUE_NOTIFY, 0);
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while (j == virtio_blk.vq->used.index) {
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Yield;
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}
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}
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Free(brq);
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VIOFlush;
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return TRUE;
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}
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U0 RedSeaTryInit(CDrv* dv)
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{
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CRedSeaBoot br;
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Bool unlock;
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try {
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unlock = DrvLock(dv);
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BlkRead(dv, &br, dv->drv_offset, 1);
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if (br.signature != MBR_PT_REDSEA || br.signature2 != 0xAA55)
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return;
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dv->fs_type = FSt_REDSEA;
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CallExtStr("RedSeaFreeFreeLst", dv);
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dv->spc = 1;
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dv->size = br.sects;
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dv->data_area = dv->drv_offset + br.bitmap_sects;
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dv->root_clus = br.root_clus;
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dv->fat1 = dv->fat2 = dv->drv_offset + 1;
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CallExtStr("DrvFATBlkAlloc", dv);
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if (unlock)
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DrvUnlock(dv);
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} catch if (unlock)
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DrvUnlock(dv);
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}
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U8 MountVirtioBlk()
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{ // Mount Virtio-blk device
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CDrv* dv = DrvMakeFreeSlot(DrvNextFreeLet('A'));
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CBlkDev* bd = BlkDevNextFreeSlot(dv->drv_let, BDT_RAM);
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CRedSeaBoot* bs = CAlloc(BLK_SIZE, adam_task);
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bd->max_blk = 512;
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BlkDevAdd(bd, , TRUE, TRUE);
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bd->type = BDT_VIRTIO_BLK;
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if (VIRTIO_BLK_MAX_BLK) {
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bd->max_blk = Min(VIRTIO_BLK_MAX_BLK, virtio_blk.blks);
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} else {
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bd->max_blk = virtio_blk.blks;
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}
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Free(bd->RAM_dsk);
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dv->size = bd->max_blk + 1 - bd->drv_offset;
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VIORBlks(dv, bs, 0, 1);
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dv->root_clus = bs->root_clus;
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dv->data_area = bs->bitmap_sects;
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dv->next_free = NULL;
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dv->last_free = NULL;
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Free(bs);
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RedSeaTryInit(dv);
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return dv->drv_let;
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}
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// DskBlk2.HC
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Bool BlkRead2(CDrv* dv, U8* buf, I64 blk, I64 cnt)
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{ // Read blk cnt from Drv to buf.
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Bool res = TRUE, unlock;
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CBlkDev* bd = dv->bd;
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if (cnt <= 0)
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return TRUE;
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DrvChk(dv);
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try {
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unlock = DrvLock(dv);
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CallExtStr("BlkDevInit", bd);
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if (dv->drv_offset && blk < dv->drv_offset || blk + cnt > dv->drv_offset + dv->size)
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throw('Drv');
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if (bd->flags & BDF_READ_CACHE)
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CallExtStr("RCache", dv, &buf, &blk, &cnt);
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if (cnt > 0) {
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switch (bd->type) {
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case BDT_RAM:
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MemCpy(buf, bd->RAM_dsk + blk << BLK_SIZE_BITS, cnt << BLK_SIZE_BITS);
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break;
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case BDT_ISO_FILE_READ:
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case BDT_ISO_FILE_WRITE:
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FBlkRead(bd->file_dsk, buf, blk, cnt);
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break;
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case BDT_ATA:
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case BDT_ATAPI:
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res = CallExtStr("ATARBlks", dv, buf, blk, cnt);
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break;
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case BDT_VIRTIO_BLK:
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res = VIORBlks(dv, buf, blk, cnt);
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break;
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}
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bd->last_time = tS;
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if (bd->flags & BDF_READ_CACHE)
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CallExtStr("DskCacheAdd", dv, buf, blk, cnt);
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}
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if (unlock)
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DrvUnlock(dv);
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} catch if (unlock)
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DrvUnlock(dv);
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return res;
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}
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Bool BlkWrite2(CDrv* dv, U8* buf, I64 blk, I64 cnt)
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{ // Write blk cnt from buf to Drv.
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Bool res = TRUE, unlock;
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CBlkDev* bd = dv->bd;
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if (cnt <= 0)
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return TRUE;
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DrvChk(dv);
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try {
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unlock = DrvLock(dv);
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CallExtStr("BlkDevInit", bd);
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if (bd->flags & BDF_READ_ONLY && !(bd->flags & BDF_READ_ONLY_OVERRIDE))
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throw('BlkDev');
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if (dv->drv_offset && blk < dv->drv_offset || blk + cnt > dv->drv_offset + dv->size)
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throw('Drv');
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if (cnt > 0) {
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switch (bd->type) {
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case BDT_RAM:
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MemCpy(bd->RAM_dsk + blk << BLK_SIZE_BITS, buf, cnt << BLK_SIZE_BITS);
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break;
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case BDT_ISO_FILE_READ:
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case BDT_ISO_FILE_WRITE:
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FBlkWrite(bd->file_dsk, buf, blk, cnt);
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break;
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case BDT_ATA:
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case BDT_ATAPI:
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res = CallExtStr("ATAWBlks", dv, buf, blk, cnt);
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break;
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case BDT_VIRTIO_BLK:
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res = VIOWBlks(dv, buf, blk, cnt);
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break;
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}
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bd->last_time = tS;
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if (bd->flags & BDF_READ_CACHE)
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CallExtStr("DskCacheAdd", dv, buf, blk, cnt);
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}
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if (unlock)
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DrvUnlock(dv);
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} catch if (unlock)
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DrvUnlock(dv);
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return res;
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}
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@patch_jmp_rel32(&BlkRead, &BlkRead2);
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@patch_jmp_rel32(&BlkWrite, &BlkWrite2);
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// DskBlkDev2.HC
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CBlkDev* BlkDevChk2(CBlkDev* bd, Bool except = TRUE)
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{ // Check for valid BlkDev. Throw exception.
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if (bd->type == BDT_VIRTIO_BLK)
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return bd;
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if (!bd || bd->bd_signature != BD_SIGNATURE_VAL || !(BDT_NULL < bd->type < BDT_TYPES_NUM)) {
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if (except)
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throw('BlkDev');
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else
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return NULL;
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} else
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return bd;
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}
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@patch_jmp_rel32(&BlkDevChk, &BlkDevChk2);
|
||||
|
||||
// DskDrv2.HC
|
||||
|
||||
DefineLstLoad("ST_BLKDEV_TYPES2",
|
||||
"NULL\0RAM\0ATA\0FILE_READ\0FILE_WRITE\0ATAPI\0NULL\0NULL\0NULL\0NULL\0VIRTIO\0");
|
||||
|
||||
U8 DrvTextAttrGet2(U8 drv_let = 0)
|
||||
{ // Get color of drive.
|
||||
U8* blkdev_text_attr2 = blkdev_text_attr;
|
||||
U8* drv_text_attr2 = drv_text_attr;
|
||||
I64 dta_size = 3;
|
||||
drv_let = Let2Let(drv_let);
|
||||
if (drv_let == 'A')
|
||||
return BLACK << 4 | WHITE;
|
||||
if ('A' <= drv_let <= 'Z')
|
||||
return blkdev_text_attr2[Let2BlkDevType(drv_let)] << 4 | drv_text_attr2[drv_let % dta_size];
|
||||
else
|
||||
return BLACK << 4 | WHITE;
|
||||
}
|
||||
|
||||
U0 DrvRep2()
|
||||
{ // Drive report.
|
||||
CDrv* dv;
|
||||
CBlkDev* bd;
|
||||
I64 ch, i, drv_let, attr;
|
||||
U8* st;
|
||||
"\nDefined Drives:\n";
|
||||
for (i = 0, dv = blkdev.drvs; i < DRVS_NUM; i++, dv++) {
|
||||
if (dv->dv_signature == DRV_SIGNATURE_VAL) {
|
||||
bd = dv->bd;
|
||||
drv_let = Drv2Let(dv);
|
||||
if (Bt(&dv->fs_type, FStf_DISABLE))
|
||||
ch = '-';
|
||||
else if (drv_let == blkdev.boot_drv_let)
|
||||
ch = ':';
|
||||
else
|
||||
ch = '+';
|
||||
attr = DrvTextAttrGet(drv_let);
|
||||
"\dFG,%d\d\dBG,%d\d%C %-8Z %-10Z %04X %04X %02X\n",
|
||||
attr & 15, attr >> 4, drv_let, dv->fs_type &FSG_TYPE_MASK, "ST_DRV_TYPES",
|
||||
bd->type, "ST_BLKDEV_TYPES2", bd->base0, bd->base1, bd->unit;
|
||||
if (st = DrvModelNum(drv_let)) {
|
||||
" Model# :%s\n", st;
|
||||
Free(st);
|
||||
}
|
||||
if (st = DrvSerialNum(drv_let)) {
|
||||
" Serial#:%s\n", st;
|
||||
Free(st);
|
||||
}
|
||||
if (bd->type == BDT_ISO_FILE_READ || bd->type == BDT_ISO_FILE_WRITE)
|
||||
" File=\"%s\"\n", bd->file_dsk_name;
|
||||
" %016X-%016X\n\dFG\d\dBG\d", dv->drv_offset, dv->drv_offset + dv->size - 1;
|
||||
}
|
||||
}
|
||||
"Home Dir:\"%s\"\n", blkdev.home_dir;
|
||||
}
|
||||
|
||||
@patch_jmp_rel32(&DrvTextAttrGet, &DrvTextAttrGet2);
|
||||
@patch_jmp_rel32(&DrvRep, &DrvRep2);
|
||||
|
||||
VirtioBlkInit;
|
||||
MountVirtioBlk;
|
||||
|
||||
if (Let2Drv('A', 0) && !Let2Drv('A')->root_clus) {
|
||||
"[virtio-blk] RedSea filesystem not initialized, formatting.\n";
|
||||
Fmt('A', , FALSE, FSt_REDSEA);
|
||||
Cd("M:/System/");
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue