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SAMV7 EMAC: Fix alignment issue: RX buffers need to be invalidated. This means the alignment of buffers must be at least to the data cache line size at both ends of the buffer

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This commit is contained in:
Gregory Nutt 2015-03-28 13:09:01 -06:00
parent bbeca4a91c
commit 3a93955fb3
2 changed files with 5 additions and 12 deletions
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15
configs/samv71-xult/README.txt
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@ -88,14 +88,8 @@ The BASIC nsh configuration is fully function (as desribed below under
So there is still plenty to be done.
6. There is a port of the SAMA5D4-EK Ethernet driver to the SAMV71-XULT.
Some basic functionality is present, but there are issues:
- There is a compiler optimization problem. At -O2, there is odd
behavior on pings and ARP messages. But the behavior is OK with
optimization disabled. This is clearly a compiler issue, but I
will need eventually to find something better than -O0.
- The driver has not been tested with I- and D-Caches enabled. There
are likely issues in that configuration.
Some basic functionality is present, but there is at least one issue:
The driver does not yet work I- and D-Caches enabled.
7. The USBHS device controller driver (DCD) is complete but non-functional.
At this point, work has stopped because I am stuck. The problem is that
@ -796,14 +790,13 @@ Configuration sub-directories
CONFIG_NSH_BUILTIN_APPS=y : Enable starting apps from NSH command line
4. The network initialization thread is NOT enabled in this configuration.
As a result, networking initialization is performed serially with
As a result, networking initialization is performed serially with
NSH bring-up. The time from reset to the NSH prompt will be determined
primarily by this network initialization time. And can be especially
long, perhaps minutes, if the network cable is not connected!
If fast boot times are required, you need to perform asynchronous
network initialization as described about under "Network Initialization
Thread"
network initialization as described under "Network Initialization Thread"
5. SDRAM is NOT enabled in this configuration.

2
configs/samv71-xult/netnsh/defconfig
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@ -751,7 +751,7 @@ CONFIG_IOB_NCHAINS=8
CONFIG_IOB_THROTTLE=8
# CONFIG_NET_ARCH_INCR32 is not set
# CONFIG_NET_ARCH_CHKSUM is not set
# CONFIG_NET_STATISTICS is not set
CONFIG_NET_STATISTICS=y
#
# Routing Table Configuration