DCMD_MMCSD_ERASE

QNX SDP8.0Devctl and Ioctl CommandsDeveloper

Erase an area on the device

Synopsis:

#include <hw/dcmd_sim_mmcsd.h>

#define DCMD_MMCSD_ERASE   __DIOTF(_DCMD_CAM, _SIM_MMCSD + 3, struct _mmcsd_erase)

Arguments to devctl():

Argument Value
filedes A file descriptor that you obtained by opening the device
dcmd DCMD_MMCSD_ERASE
dev_data_ptr A pointer to a MMCSD_ERASE structure
n_bytes sizeof(MMCSD_ERASE)
dev_info_ptr NULL

Description:

This command erases part of a device.

Input:

An MMCSD_ERASE structure that specifies the area to erase: 

typedef struct _mmcsd_erase {
        uint32_t                action;
        uint32_t                rsvd;
        uint64_t                lba;
        uint64_t                nlba;
        uint64_t                rsvd2;
} MMCSD_ERASE;

The members include:

action
The action to take; one of:
  • MMCSD_ERASE_ACTION_NORMAL
  • MMCSD_ERASE_ACTION_SECURE
lba
The logical block address to start erasing at.
nlba
The number of logical blocks to erase.

Output:

None.

See also:

devctl() in the QNX OS C Library Reference

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