Each of these then contains a pointer to the actual physical address of the memory used for the packet. This page was last modified on 11 June , at This page has been accessed 13, times. During normal initialization and use of the cards, the CSRs are used exclusively. You need to parse ACPI tables etc. Views Read Edit View history. Receive lockup may occur if bus latency is large.

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AMD Lance Am7990

If a new packet has been signalled then CSR0 bit 10 will be set. At initialization, you would want the card to ‘own’ all the receive buffers so it can write new packets into them that it receives, then flip ownership pcneg the driverand the driver to ‘own’ all the transmit buffers so it can write packets to be transmitted, then flip ownership to the driver.

MODE provides various functions to control how the card works with regards to sending and receiving packets, and running loopback tests.

By using this site, you agree to the Terms of Use and Privacy Policy. Once initialization has completed, you can finally start the card. Please improve it by ocnet the claims made and adding inline citations.

The card uses two ring buffers to store packets: You also need a simple way of incrementing the pointer and wrapping back to the start if necessary. Views Read View source View history. smd


There are other bits in CSR0 than can be set depending on how you set up interrupt masks in CSR3 and additionally other bits in CSR4 that can signal interrupts although these are usually masked out on reset. The card maintains separate pointers internally. Views Read Edit View history. Finally, once all our ring buffers are set up, we need to give their addresses to the card. If it is set, it means the card owns it and the driver should not touch the entire entry.

You probably want to set it to zero enable transmit and receive functionality, receive broadcast packets and those sent this physical address, disable promiscuous mode. This page was last modified on 11 Juneat Up to ring buffers can be used.

Virtual networking

If you do not wish to use logical addressing the defaultthen set these bytes to zero. No capability for transmit buffer byte count of zero. During normal initialization and use of the cards, the CSRs are used exclusively. Statements consisting only of original ocnet should be pchet. From Wikipedia, the free encyclopedia. You can do this by either waiting for an interrupt if you didn’t disable the initialization done interrupt in CSR3 or by polling until CSR0 bit 8 is set.


Interrupt done mask – if set then you won’t get an interrupt when the card has finished initializing. It has built-in support for CRC checks and can automatically pad short packets to the minimum Ethernet length. Receive descriptor zero byte count buffer interpreted as available bytes.

There are two ways of setting up the card registers: C chips have a bug which causes garbage to be inserted in front of the received packet. And this chip bug might be the reason. This article will focus on the Ii a.


You also need to specify the physical address MAC address you want the card to use. This page has been accessed 13, times. About This site Joining Editing help Recent changes. This page was last edited on 17 Aprilat You will need to allocate a 28 byte region of physical memory, aligned on a bit boundary.

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