114 lines
2.7 KiB
C
114 lines
2.7 KiB
C
/*
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* Plants-OS VDiskDriver
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* Copyright by min0911.
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*/
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#include "../include/vdisk.h"
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#include "../include/printf.h"
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int getReadyDisk();
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vdisk vdisk_ctl[10];
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int init_vdisk() {
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for (int i = 0; i < 10; i++) {
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vdisk_ctl[i].flag = 0; // 设置为未使用
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}
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printf("[\035kernel\036]: VDisk driver load success!\n");
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return 0;
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}
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int register_vdisk(vdisk vd) {
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for (int i = 0; i < 10; i++) {
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if (!vdisk_ctl[i].flag) {
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vdisk_ctl[i] = vd; // 找到了！
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return i + ('A'); // 注册成功，返回drive
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}
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}
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printf("[vdisk]not found\n");
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return 0; // 注册失败
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}
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int logout_vdisk(char drive) {
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int indx = drive - ('A');
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if (indx > 10) {
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return 0; // 失败
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}
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if (vdisk_ctl[indx].flag) {
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vdisk_ctl[indx].flag = 0; // 设置为没有
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return 1; // 成功
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} else {
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return 0; // 失败
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}
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}
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int rw_vdisk(char drive, unsigned int lba, unsigned char *buffer,
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unsigned int number, int read) {
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int indx = drive - ('A');
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if (indx > 10) {
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return 0; // 失败
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}
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if (vdisk_ctl[indx].flag) {
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if (read) {
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vdisk_ctl[indx].Read(drive, buffer, number, lba);
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//for(;;);
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} else {
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vdisk_ctl[indx].Write(drive, buffer, number, lba);
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}
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return 1; // 成功
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} else {
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return 0; // 失败
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}
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}
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int have_vdisk(char drive) {
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int indx = drive - 'A';
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if (indx > 10) {
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return 0; // 失败
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}
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if (vdisk_ctl[indx].flag) {
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return 1; // 成功
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} else {
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return 0; // 失败
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}
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}
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void Disk_Read(unsigned int lba, unsigned int number, void *buffer,
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char drive) {
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if (have_vdisk(drive)) {
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for (int i = 0; i < number; i += SECTORS_ONCE) {
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int sectors =
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((number - i) >= SECTORS_ONCE) ? SECTORS_ONCE : (number - i);
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rw_vdisk(drive, lba + i, buffer + i * 512, sectors, 1);
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}
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}
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}
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int disk_Size(char drive) {
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unsigned char drive1 = drive;
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if (have_vdisk(drive1)) {
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int indx = drive1 - 'A';
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return vdisk_ctl[indx].size;
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} else {
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print("Disk Not Ready.\n");
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return 0;
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}
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return 0;
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}
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int DiskReady(char drive) { return have_vdisk(drive); }
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int getReadyDisk() { return 0; }
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void Disk_Write(unsigned int lba, unsigned int number, void *buffer,
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char drive) {
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if (have_vdisk(drive)) {
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for (int i = 0; i < number; i += SECTORS_ONCE) {
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int sectors =
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((number - i) >= SECTORS_ONCE) ? SECTORS_ONCE : (number - i);
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rw_vdisk(drive, lba + i, buffer + i * 512, sectors, 0);
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}
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}
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}
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