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33 lines
907 B
33 lines
907 B
2 years ago
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#ifndef _RAMDEV_H_
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#define _RAMDEV_H_
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#include "riscv.h"
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#include "util/types.h"
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#define RAMDISK_BLOCK_COUNT 128
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#define RAMDISK_BLOCK_SIZE PGSIZE
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#define MAX_RAMDISK_COUNT 10
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#define RAMDISK_FREE 0
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#define RAMDISK_USED 1
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struct rfs_device {
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void *d_address; // the ramdisk base address
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int d_blocks; // the number of blocks of the device
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int d_blocksize; // the blocksize (bytes) per block
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void *iobuffer; // iobuffer for write/read
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int (*d_write)(struct rfs_device *rdev, int blkno); // device write funtion
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int (*d_read)(struct rfs_device *rdev, int blkno); // device read funtion
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};
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#define dop_write(rdev, blkno) ((rdev)->d_write(rdev, blkno))
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#define dop_read(rdev, blkno) ((rdev)->d_read(rdev, blkno))
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struct device *init_rfs_device(const char *dev_name);
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struct rfs_device *alloc_rfs_device(void);
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extern struct rfs_device *rfs_device_list[MAX_RAMDISK_COUNT];
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#endif
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