05-11-2004
Traced out the error. Itz will the Pointer incompatible.
Itz all resolved.
I set the gcc complier with some set of option.
And so I cannot set other option on it.
Where can I learn more about the gdb?
Thanks and Regards,
P. Prathaban
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LEARN ABOUT FREEBSD
altera_sdcardc
ALTERA_SDCARD(4) BSD Kernel Interfaces Manual ALTERA_SDCARD(4)
NAME
altera_sdcard -- driver for the Altera University Program Secure Data Card IP Core
SYNOPSIS
device altera_sdcard
In /boot/device.hints:
hint.altera_sdcardc.0.at="nexus0"
hint.altera_sdcardc.0.maddr=0x7f008000
hint.altera_sdcardc.0.msize=0x400
DESCRIPTION
The altera_sdcard device driver provides support for the Altera University Program Secure Data Card (SD Card) IP Core device. A controller
device, altera_sdcardcX, will be attached during boot. Inserted disks are presented as disk(9) devices, altera_sdcardX, corresponding to the
controller number.
HARDWARE
The current version of the altera_sdcard driver supports the SD Card IP core as described in the August 2011 version of Altera's documenta-
tion. The core supports only cards up to 2G (CSD 0); larger cards, or cards using newer CSD versions, will not be detected. The IP core has
two key limitations: a lack of interrupt support, requiring timer-driven polling to detect I/O completion, and support for only single
512-byte block read and write operations at a time. The combined effect of those two limits is that the system clock rate, HZ, must be set
to at least 200 in order to accomplish the maximum 100KB/s data rate supported by the IP core.
SEE ALSO
disk(9)
Altera University Program Secure Data Card IP Core, Altera Corporation - University Program,
ftp://ftp.altera.com/up/pub/Altera_Material/11.0/University_Program_IP_Cores/Memory/SD_Card_Interface_for_SoPC_Builder.pdf, August 2011.
HISTORY
The altera_sdcard device driver first appeared in FreeBSD 10.0.
AUTHORS
The altera_sdcard device driver and this manual page were developed by SRI International and the University of Cambridge Computer Laboratory
under DARPA/AFRL contract (FA8750-10-C-0237) (``CTSRD''), as part of the DARPA CRASH research programme. This device driver was written by
Robert N. M. Watson.
BUGS
altera_sdcard contains a number of work-arounds for IP core bugs. Perhaps most critically, altera_sdcard ignores the CRC error bit returned
in the RR1 register, which appears to be unexpectedly set by the IP core.
altera_sdcard uses fixed polling intervals are used for card insertion/removal and I/O completion detection; an adaptive strategy might
improve performance by reducing the latency to detecting completed I/O. However, in our experiments, using polling rates greater than 200
times a second did not improve performance.
altera_sdcard supports only a nexus bus attachment, which is appropriate for system-on-chip busses such as Altera's Avalon bus. If the IP
core is configured off of another bus type, then additional bus attachments will be required.
BSD
August 18, 2012 BSD