Flash Disk Block Device Implementation. More...
#include <rtems.h>#include <rtems/libio.h>#include <errno.h>#include <stdlib.h>#include <stdio.h>#include <string.h>#include <inttypes.h>#include "rtems/blkdev.h"#include "rtems/diskdevs.h"#include "rtems/flashdisk.h"
Include dependency graph for flashdisk.c:
Data Structures | |
| struct | rtems_fdisk_page_desc |
| The start of a segment has a segment control table. More... | |
| struct | rtems_fdisk_segment_ctl |
| Flash Segment Control holds the pointer to the segment, number of pages, various page stats and the memory copy of the page descriptors. More... | |
| struct | rtems_fdisk_segment_ctl_queue |
| Segment control table queue. More... | |
| struct | rtems_fdisk_device_ctl |
| Flash Device Control holds the segment controls. More... | |
| struct | rtems_fdisk_block_ctl |
| The Block control holds the segment and page with the data. More... | |
| struct | rtems_flashdisk |
| The virtual block table holds the mapping for blocks as seen by the disk drivers to the device, segment and page numbers of the physical device. More... | |
Macros | |
| #define | RTEMS_FDISK_TRACE 1 |
| Control tracing. More... | |
| #define | RTEMS_FDISK_PAGE_ACTIVE (1 << 0) |
| Flag the page as active. | |
| #define | RTEMS_FDISK_PAGE_USED (1 << 1) |
| Flag the page as used. | |
| #define | rtems_fdisk_calc_crc16(_b, _c) rtems_fdisk_crc16_factor[((_b) ^ ((_c) & 0xff)) & 0xff] ^ (((_c) >> 8) & 0xff) |
| Calculate the CRC16 checksum. More... | |
Typedefs | |
| typedef struct rtems_fdisk_page_desc | rtems_fdisk_page_desc |
| The start of a segment has a segment control table. More... | |
| typedef struct rtems_fdisk_segment_ctl | rtems_fdisk_segment_ctl |
| Flash Segment Control holds the pointer to the segment, number of pages, various page stats and the memory copy of the page descriptors. | |
| typedef struct rtems_fdisk_segment_ctl_queue | rtems_fdisk_segment_ctl_queue |
| Segment control table queue. | |
| typedef struct rtems_fdisk_device_ctl | rtems_fdisk_device_ctl |
| Flash Device Control holds the segment controls. | |
| typedef struct rtems_fdisk_block_ctl | rtems_fdisk_block_ctl |
| The Block control holds the segment and page with the data. | |
| typedef struct rtems_flashdisk | rtems_flashdisk |
| The virtual block table holds the mapping for blocks as seen by the disk drivers to the device, segment and page numbers of the physical device. | |
Functions | |
| rtems_device_driver | rtems_fdisk_initialize (rtems_device_major_number major, rtems_device_minor_number minor, void *arg) |
| Flash disk device driver initialization. More... | |
Detailed Description
Flash Disk Block Device Implementation.
Macro Definition Documentation
◆ rtems_fdisk_calc_crc16
| #define rtems_fdisk_calc_crc16 | ( | _b, | |
| _c | |||
| ) | rtems_fdisk_crc16_factor[((_b) ^ ((_c) & 0xff)) & 0xff] ^ (((_c) >> 8) & 0xff) |
Calculate the CRC16 checksum.
- Parameters
-
_b The byte to checksum. _c The current checksum.
◆ RTEMS_FDISK_TRACE
| #define RTEMS_FDISK_TRACE 1 |
Control tracing.
It can be compiled out of the code for small footprint targets. Leave in by default.
Typedef Documentation
◆ rtems_fdisk_page_desc
| typedef struct rtems_fdisk_page_desc rtems_fdisk_page_desc |
The start of a segment has a segment control table.
This hold the CRC and block number for the page.
- Todo:
- A sequence number for the block could be added. This would mean a larger descriptor size. Need to make the sequence large like 20+ bits so a large file system would not have more blocks available than the sequence number.
