blob: ceb5af3997dbec8651bfde9a8eaf0d26a231076d [file] [log] [blame]
/*
* Copyright (c) 2016 Intel Corporation.
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <string.h>
#include <stdint.h>
#include <misc/__assert.h>
#include <disk_access.h>
#include <errno.h>
#define RAMDISK_SECTOR_SIZE 512
#if defined(CONFIG_USB_MASS_STORAGE)
/* A 16KB initialized RAMdisk which will fit on most target's RAM. It
* is initialized with a valid file system for validating USB mass storage.
*/
#include "fat12_ramdisk.h"
#else
/* A 96KB RAM Disk, which meets ELM FAT fs's minimum block requirement. Fit for
* qemu testing (as it may exceed target's RAM limits).
*/
#define RAMDISK_VOLUME_SIZE (192 * RAMDISK_SECTOR_SIZE)
static uint8_t ramdisk_buf[RAMDISK_VOLUME_SIZE];
#endif
static void *lba_to_address(uint32_t lba)
{
__ASSERT(((lba * RAMDISK_SECTOR_SIZE) < RAMDISK_VOLUME_SIZE),
"FS bound error");
return &ramdisk_buf[(lba * RAMDISK_SECTOR_SIZE)];
}
int disk_access_status(void)
{
return DISK_STATUS_OK;
}
int disk_access_init(void)
{
return 0;
}
int disk_access_read(uint8_t *buff, uint32_t sector, uint32_t count)
{
memcpy(buff, lba_to_address(sector), count * RAMDISK_SECTOR_SIZE);
return 0;
}
int disk_access_write(const uint8_t *buff, uint32_t sector, uint32_t count)
{
memcpy(lba_to_address(sector), buff, count * RAMDISK_SECTOR_SIZE);
return 0;
}
int disk_access_ioctl(uint8_t cmd, void *buff)
{
switch (cmd) {
case DISK_IOCTL_CTRL_SYNC:
break;
case DISK_IOCTL_GET_SECTOR_COUNT:
*(uint32_t *)buff = RAMDISK_VOLUME_SIZE / RAMDISK_SECTOR_SIZE;
break;
case DISK_IOCTL_GET_SECTOR_SIZE:
*(uint32_t *)buff = RAMDISK_SECTOR_SIZE;
break;
case DISK_IOCTL_GET_ERASE_BLOCK_SZ:
*(uint32_t *)buff = 1;
break;
case DISK_IOCTL_GET_DISK_SIZE:
*(uint32_t *)buff = RAMDISK_VOLUME_SIZE;
break;
default:
return -EINVAL;
}
return 0;
}