37 lines
795 B
C
37 lines
795 B
C
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#include "u_types.h"
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#include "ram_disk.h"
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#include <string.h>
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#define RAM_DISK_SECTOR_NR 256
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static uint8_t ram_disk[RAM_DISK_SECTOR_NR * 512];
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int ram_disk_sector_nr(void)
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{
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return RAM_DISK_SECTOR_NR;
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}
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int ram_disk_read(uint8_t *buff, uint32_t sector, uint32_t count)
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{
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if (sector + count >= RAM_DISK_SECTOR_NR)
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{
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return -1;
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}
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for (int i = sector; i < sector + count; i++)
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{
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memcpy(buff + (i - sector) * 512, &ram_disk[i * 512], 512);
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}
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return 0;
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}
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int ram_disk_write(uint8_t *buff, uint32_t sector, uint32_t count)
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{
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if (sector + count >= RAM_DISK_SECTOR_NR)
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{
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return -1;
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}
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for (int i = sector; i < sector + count; i++)
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{
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memcpy(&ram_disk[i * 512], buff + (i - sector) * 512, 512);
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}
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return 0;
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}
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