DCMD_F3S_GEOINFO

QNX SDP8.0Devctl and Ioctl CommandsDeveloper

Get the flash geometry

Synopsis:

#include <sys/dcmd_f3s.h>

#define DCMD_F3S_GEOINFO    __DIOTF(_DCMD_F3S, F3S_GEOINFO, f3s_geoinfo_t)

Arguments to devctl():

Argument Value
filedes A file descriptor that you obtained by opening the device.
dcmd DCMD_F3S_GEOINFO
dev_data_ptr A pointer to a f3s_geoinfo_t structure (see below)
n_bytes sizeof(f3s_geoinfo_t)
dev_info_ptr NULL

Description:

This command gets the flash geometry.

Note:
This command returns a maximum of 16 geometries. In the future when flash parts have more than 16, there will be an extended form of this command.

Input:

A f3s_geoinfo_t structure: 

struct geo_list
{
  uint16_t unit_num;       /* Number of sectors in run */
  uint16_t unit_pow2;      /* Sector size for this run */
};

typedef struct f3s_geoinfo_s
{
  uint32_t status;
  _Paddr64t base;            /* Phys base address */
  uint32_t size;             /* Size of flash */
  uint16_t chipwidth;        /* Width of a single chip, in bytes */
  uint16_t interleave;       /* Number of chips in parallel on data bus */
  uint16_t num_geo;          /* Number of entries in the geo array */
  struct geo_list geo[16];   /* Maximum of 16 distinct geos */
}f3s_geoinfo_t;

Output:

A filled-in f3s_geoinfo_t structure.

See also:

devctl() in the QNX OS C Library Reference

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