SAM4 Ethernet Driver: No supports operation using the high priority work queue so that packet processing can occur outside of interrupt level processing.

SAM4E-EK: The nsh configuration now configures the Ethernet driver for execution on the HP work thread.

configs/sam4e-ek/nsh/defconfig

@@ -415,6 +415,7 @@ CONFIG_SIG_SIGUSR1=1
 CONFIG_SIG_SIGUSR2=2
 CONFIG_SIG_SIGALARM=3
 CONFIG_SIG_SIGCONDTIMEDOUT=16
+CONFIG_SIG_SIGWORK=17
 
 #
 # POSIX Message Queue Options
@@ -425,8 +426,11 @@ CONFIG_MQ_MAXMSGSIZE=32
 #
 # Work Queue Support
 #
-# CONFIG_SCHED_WORKQUEUE is not set
+CONFIG_SCHED_WORKQUEUE=y
-# CONFIG_SCHED_HPWORK is not set
+CONFIG_SCHED_HPWORK=y
+CONFIG_SCHED_HPWORKPRIORITY=224
+CONFIG_SCHED_HPWORKPERIOD=50000
+CONFIG_SCHED_HPWORKSTACKSIZE=2048
 # CONFIG_SCHED_LPWORK is not set
 
 #
@@ -620,7 +624,7 @@ CONFIG_USART1_2STOP=0
 CONFIG_ARCH_HAVE_NET=y
 CONFIG_ARCH_HAVE_PHY=y
 CONFIG_NET=y
-# CONFIG_NET_NOINTS is not set
+CONFIG_NET_NOINTS=y
 # CONFIG_NET_PROMISCUOUS is not set
 
 #
@@ -709,7 +713,9 @@ CONFIG_NET_ARP=y
 CONFIG_NET_ARPTAB_SIZE=16
 CONFIG_NET_ARP_MAXAGE=120
 # CONFIG_NET_ARP_IPIN is not set
-# CONFIG_NET_ARP_SEND is not set
+CONFIG_NET_ARP_SEND=y
+CONFIG_ARP_SEND_MAXTRIES=5
+CONFIG_ARP_SEND_DELAYMSEC=20
 
 #
 # Network I/O Buffer Support