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hekate/bdk/storage/ramdisk.c

67 lines
1.6 KiB
C

/*
* Ramdisk driver for Tegra X1
*
* Copyright (c) 2019 CTCaer
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include "ramdisk.h"
#include <mem/heap.h>
#include <utils/types.h>
#include <memory_map.h>
int ram_disk_init(FATFS *ram_fs)
{
int res;
u8 *buf = malloc(0x400000);
f_mount(NULL, "ram:", 1); // Unmount ramdisk.
res = f_mkfs("ram:", FM_EXFAT, RAMDISK_CLUSTER_SZ, buf, 0x400000); // Format as exFAT w/ 32KB cluster.
if (!res)
res = f_mount(ram_fs, "ram:", 1); // Mount ramdisk.
free(buf);
return res;
}
int ram_disk_read(u32 sector, u32 sector_count, void *buf)
{
u32 sector_off = RAM_DISK_ADDR + (sector << 9);
u32 bytes_count = sector_count << 9;
if ((sector_off - RAM_DISK_ADDR) > RAM_DISK_SZ)
return 1;
memcpy(buf, (void *)sector_off, bytes_count);
return 0;
}
int ram_disk_write(u32 sector, u32 sector_count, const void *buf)
{
u32 sector_off = RAM_DISK_ADDR + (sector << 9);
u32 bytes_count = sector_count << 9;
if ((sector_off - RAM_DISK_ADDR) > RAM_DISK_SZ)
return 1;
memcpy((void *)sector_off, buf, bytes_count);
return 0;
}