10 More Discussions You Might Find Interesting
1. UNIX for Beginners Questions & Answers
How would I write a value to a physical memory address?
I was able to read a physical memory address (for example, 0x400) using this line:
dd if=/dev/mem count=4 bs=1 skip=$(( 0x400 ))
But I get an error:
dd: 'standard input': cannot skip to specified offset
when I try to write using... (1 Reply)
Discussion started by: rabrandt
i want to set ip address to a vitrual machine i am using following command.
but it is not ifconfig -a command output.
what is wrong i dont know
bash# ifconfig interfacename plumb
bash# ifconfig interfacename auto-dhcp
Please use code tags next time for your code and data. (4 Replies)
Discussion started by: nikhil kasar
I need some help to write a C++ code that read and write the register of a sequencer. I have to make a code that relate the objects with the physical address but I am a bit confuse. Could someone suggest me how to proceed? in which parts do I split the code?
thanks (1 Reply)
Discussion started by: silviafisica
How do I deternine the physical location of an ethernet port, based on the hardware address?
I have 4 ports on a 9133-55A
Two of these are internal, and two are on a card. I need to single out ent0 and ent2, but I cannot find any... (4 Replies)
Discussion started by: mhenryj
I am new to HACMP V5.4 in AIX5.3.Please let me know how to get the virtual IP address configured for a HACMP cluster.
Is this the correct way to identify it?
If i give ifconfig -a the first ip address displayed is the real address of the host.So the other one can be VIP.
Thanks in Advance (3 Replies)
Discussion started by: guru13
I need help to add new route:
10.252.0.138, GW 10.252.0.129 to e1000g1
10.252.0.10, GW 10.252.0.1 to e1000g2
tnx (4 Replies)
Discussion started by: mehrdad68
7. UNIX for Dummies Questions & Answers
Hello,I am new to unix,i want to know how to assign virtual ip address to a system that is in my personal network? (1 Reply)
Discussion started by: veeru_jarugula
I need command to give logical and physical IP Address for my machine.
thank you (1 Reply)
Discussion started by: magasem
9. IP Networking
We currently have a Solaris Wks that is being used as an "ftp server" and
it routinely accepts data each night that if ftp'd to it from off site. In the event that this "ftp server" should fail (crash, die, whatever) we would like to have an automatic fail over to a second Solaris Wks as the "ftp... (2 Replies)
Discussion started by: kanejm
10. IP Networking
I bound a virtual IP to a network card on my E450 server and I am getting this error when I reboot the server, saying, " retrying host, RPC time out. I had to break this sequence and allow other services to load. Of course they didn't load properly. Please how can I sort this out? I do need... (8 Replies)
Discussion started by: Ronny
svatophys - General: Converts a system virtual address to a physical address
vm_offset_t *phys_addr );
Specifies the kernel virtual address. Specifies a pointer to the physical address to be filled in.
The svatophys routine converts a system virtual address to the corresponding physical address. All address and data structure manipulation
done within the kernel is performed using system virtual addresses. Typically, system virtual addresses are a means of mapping physical
memory and I/O space, which often consists of device registers and DMA buffers. In contrast to this, devices are usually unaware of any
virtual addressing and for this reason use physical addresses. You use the svatophys routine to perform this address translation.
As an example of where you can use this address translation, a disk device driver can use DMA buffers to transfer blocks of data to the
disk (for the case of a write operation). The data to be written to disk is present in system memory at a system virtual address known to
the driver. To initiate the DMA operation, the disk driver can set up a command packet to specify a write operation to the underlying disk
controller hardware. This write command packet contains (among other things) the location of the DMA buffer as a physical address and the
length of the buffer. Here, the driver calls the svatophys routine to translate the system virtual address of the DMA buffer to a physical
address in the command packet issued to the disk driver.
The svatophys routine returns the following: The address translation has been completed successfully. Unable to perform address transla-
tion. This value indicates that the address specified by the kern_addr argument is not a valid kernel or system virtual address.