Commit Graph

9 Commits (d5422c2ecc3d4c4ff3cd30f215c0752e8c30ed82)

Author SHA1 Message Date
Rejeesh Kutty 7e52cf9568 up_axi: timeout generating multiple/repeated acks 2014-10-23 13:51:33 -04:00
Rejeesh Kutty 2817ccdb22 up_axi: altera can not handle same clock assertion of arready and rvalid 2014-10-09 15:25:05 -04:00
Rejeesh Kutty de33722470 up/constr: independent read/write and local constraints 2014-10-02 14:35:59 -04:00
Lars-Peter Clausen b877cea2ed up_axi: Add parameter to configure the internal address width
Not all peripherals need 14 bit of address space.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2014-09-11 12:26:40 +02:00
Lars-Peter Clausen 41cc92ef49 Remove BASEADDR/HIGHADDR parameters
This is unused and unneeded. The AXI interconnect will make sure that a
peripheral only gets requests that are meant for it, there is no need to
check the address in the peripheral itself.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2014-09-11 12:26:37 +02:00
Lars-Peter Clausen 6ad589475a up_axi: Prevent read and write requests from racing against each other
Make sure that if a read and a write request arrive on the very same clock
cycle to only accept one of them. The simple solution chosen here is to only
accept the write request when this happens and delay the acceptance of the
read request until the write request is finished.

This solution is not fair since a write request will always take precedence,
which in theory allows the write bus to starve the read bus. But in practice
we should never see that many write requests that we are unable to answer
the read request.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2014-09-10 13:04:05 +02:00
Lars-Peter Clausen 18a506b3ca up_axi: Wait for the transaction to fully finish before releasing up_axi_access
Wait for the master to accept the response for the current transaction
before we allow a new transaction to start.

This fixes problems in case the master is not ready to accept the response
when we make it available.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
2014-09-10 13:03:52 +02:00
Rejeesh Kutty d4be46cc17 library: register map changes and for mathworks 2014-06-24 14:23:56 -04:00
Rejeesh Kutty f7c9368abc initial checkin 2014-02-28 14:26:22 -05:00