about device driver registration
ckim at etri.re.kr
Sun Jul 12 11:25:39 UTC 2015
In RTEMS, defining CONFIGURE_APPLICATION_NEEDS_XXX_DRIVERS in init.c places the driver address table in the "Device_driver" table(of type rtems_driver_address_table, it's in confdef.h). I found rtems_io_register_driver function places the driver address entry in the "_IO_Driver_address_table" which is also of type rtems_driver_address_table(see ioregisterdriver.c).
What is the difference of Device_driver table and _IO_Driver_address_table? How differently are those tables used in RTEMS?
I'm having difficulty in mounting the SD card. Using rtems_bdpart_register_from_disk function, while trying to read the master boot record, the rtems_disk_fd_get_disk_device function can't get the rtems_disk_device from fd(file descriptor, fd=3 in my case).
untimately in ioctl function, the line
rc = (*iop->pathinfo.handlers->ioctl_h)( iop, command, buffer );
But using rtems_ide_part_table_initialize(instead of rtems_bdpart_register_from_disk_function), it reads the MBR anyway but fails the rtems_fsmount later.
Can anybody tell me what could have gone wrong? Any help would be deeply appreciated.
Chan Kim / ETRI
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