This version of this document is no longer maintained. For the latest documentation, see http://www.qnx.com/developers/docs.

`startup-ddb-vrc5074`

Startup for NEC DDB-VRC5074 evaluation board (QNX Neutrino)

Syntax:

startup-ddb-vrc5074 [-A]
    [-D channel[.channel_opts]] 
    [-F [~]value]
    [-f [cpu_freq][,[cycles_freq][,timer_freq]]] 
    [-j addr] [-K channel[.channel_opts]] 
    [-N hostname] [-R size] [-r addr,size[,flag]] 
    [-S [~]section] [-v[v]...]

Options:

-A

Reboot the system on any abnormal termination of the kernel. The default is to display information about the crash, and then halt.

-D channel[.channel_opts]

Specify an output channel for debugging information. See below for details.

-F [~]value

Control the flags field in the cpuinfo section of the system page:

value -- OR the flags field with value
~value -- AND the flags field with ~value

The option was added in the QNX Neutrino Core OS 6.3.2.

For more information about the flags, see "Structure of the system page" in the Customizing Image Startup Programs chapter of the Building Embedded Systems guide.

-f [cpu_freq][,[cycles_freq][,timer_freq]]

Specify CPU frequencies. All frequencies can be followed by H for hertz, K for kilohertz, or M for megahertz (these suffixes aren't case-sensitive). If no suffix is given, the library assumes megahertz if the number is less than 1000; otherwise it assumes hertz.

If they're specified, cpu_freq, cycles_freq, and timer_freq are used to set the corresponding variables in the startup code:

cpu_freq -- the CPU clock frequency. It's also used to set the speed field in the cpuinfo section of the system page.
cycles_freq -- the frequency at which the value returned by ClockCycles() increments. It's also used to set the cycles_per_sec field in the qtime section of the system page.
timer_freq -- the frequency at which the timer chip input runs. It's also used to set the timer_rate and timer_scale values of the qtime section of the system page.

If a variable is zero when it comes time to set the field(s) on the system page, the library code attempts to deduce the proper value by using one of the other frequency variables. Which one it uses depends on the particular CPU and hardware.

-j addr

For use with JTAG/hardware debuggers.

Reserve 4 bytes of RAM at the physical address specified by addr, and copy the physical address of the location of the system page to addr in RAM so that it can be retrieved by a hardware debugger.

-K channel[.channel_opts]

Specify an output channel for kernel debugger information. See below for details.

-N hostname

Specify the node name. The default is the local host.

-R size

Remove size memory from system use. This is useful for testing in a restricted-memory environment.

-r addr,size[,flag]

Remove size memory from system use starting at addr.

The flag is an optional argument used to specify if the memory should be cleared:

If the value of the flag passed is:	Memory:
None	Clears to 0
0	Clears to 0
1	Does not clear

-S [~]section

Turn on (or, if you use ~section, off) output of the specified syspage section's information. Use this to restrict the amount of syspage information. For more information, see the description of print_syspage() in the Customizing Image Startup Programs chapter of Building Embedded Systems.

-v[v]...

Be verbose. More v characters cause even more verbosity.

Debug channels

The debug channel specified with the -D and -K options can be:

8250.port[^shift].baud.clock.divisor.register_recovery

Use a Zilog SCC serial chip, with:

port: Specify the I/O port base address for the SCC, in hexadecimal. The default for the -D option is 0c0060003f8; for -K, it's 0x01fa00300.
shift: Specify the spacing between the I/O registers, in 2^shift bytes. The default is 0.
baud: Specify the baud rate for the debug channel. The default is 9600.
clock: Specify the clock rate (in Hz) input to the chip. The default is 1843200.
divisor: Specify the divisor used on the clock rate by the chip. The default is 16.

You can skip options by leaving out the data associated with that part. For example, if you want to send the debugging output to a 8250 chip using 57600 baud, use:

-D 8250..57600

The default -D and -K settings are:

-D 8250.0x0060003f8^0.9600.1843200.16
-K 8250.0x01fa00300^0.9600.1843200.16

Description:

The startup-ddb-vrc5074 program is responsible for initializing the NEC DDB-VRC5074 evaluation board.

Examples:

See ${QNX_TARGET}/mipsle/build.