39 lines
1.0 KiB
C
39 lines
1.0 KiB
C
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#define BLKDEV_BASE 0x10015000
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#define BLKDEV_ADDR BLKDEV_BASE
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#define BLKDEV_OFFSET (BLKDEV_BASE + 8)
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#define BLKDEV_LEN (BLKDEV_BASE + 12)
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#define BLKDEV_WRITE (BLKDEV_BASE + 16)
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#define BLKDEV_REQUEST (BLKDEV_BASE + 17)
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#define BLKDEV_NREQUEST (BLKDEV_BASE + 18)
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#define BLKDEV_COMPLETE (BLKDEV_BASE + 19)
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#define BLKDEV_NCOMPLETE (BLKDEV_BASE + 20)
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#define BLKDEV_NSECTORS (BLKDEV_BASE + 24)
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#define BLKDEV_MAX_REQUEST_LENGTH (BLKDEV_BASE + 28)
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#define BLKDEV_SECTOR_SIZE 512
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#define BLKDEV_SECTOR_SHIFT 9
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static inline size_t blkdev_nsectors(void)
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{
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return reg_read32(BLKDEV_NSECTORS);
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}
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static inline size_t blkdev_max_req_len(void)
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{
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return reg_read32(BLKDEV_MAX_REQUEST_LENGTH);
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}
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static inline unsigned int blkdev_send_request(
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unsigned long addr,
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unsigned int offset,
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unsigned int len,
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unsigned char write)
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{
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reg_write64(BLKDEV_ADDR, addr);
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reg_write32(BLKDEV_OFFSET, offset);
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reg_write32(BLKDEV_LEN, len);
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reg_write8(BLKDEV_WRITE, write);
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asm volatile ("fence");
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return reg_read8(BLKDEV_REQUEST);
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}
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