mirror of
https://github.com/CTCaer/hekate.git
synced 2024-11-20 05:11:42 +00:00
87 lines
2.0 KiB
C
87 lines
2.0 KiB
C
/*
|
|
* Ramdisk driver for Tegra X1
|
|
*
|
|
* Copyright (c) 2019-2021 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 <libs/fatfs/diskio.h>
|
|
#include <libs/fatfs/ff.h>
|
|
#include <mem/heap.h>
|
|
#include <utils/types.h>
|
|
|
|
#include <memory_map.h>
|
|
|
|
static u32 disk_size = 0;
|
|
|
|
int ram_disk_init(void *ram_fs, u32 ramdisk_size)
|
|
{
|
|
int res = 0;
|
|
disk_size = ramdisk_size;
|
|
FATFS *ram_fatfs = (FATFS *)ram_fs;
|
|
|
|
// If ramdisk is not raw, format it.
|
|
if (ram_fs)
|
|
{
|
|
u8 *buf = malloc(0x400000);
|
|
|
|
// Set ramdisk size.
|
|
ramdisk_size >>= 9;
|
|
disk_set_info(DRIVE_RAM, SET_SECTOR_COUNT, &ramdisk_size);
|
|
|
|
// Unmount ramdisk.
|
|
f_mount(NULL, "ram:", 1);
|
|
|
|
// Format as exFAT w/ 32KB cluster with no MBR.
|
|
res = f_mkfs("ram:", FM_EXFAT | FM_SFD, RAMDISK_CLUSTER_SZ, buf, 0x400000);
|
|
|
|
// Mount ramdisk.
|
|
if (!res)
|
|
res = f_mount(ram_fatfs, "ram:", 1);
|
|
|
|
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) > disk_size)
|
|
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) > disk_size)
|
|
return 1;
|
|
|
|
memcpy((void *)sector_off, buf, bytes_count);
|
|
|
|
return 0;
|
|
}
|