runtime: link against lwip, cleanups

soc/runtime/Makefile

@@ -40,7 +40,8 @@ runtime.elf: $(OBJECTS) libs
 		$(OBJECTS) \
 		-L$(MSCDIR)/software/libbase \
 		-L$(MSCDIR)/software/libcompiler-rt \
-		-lbase -lcompiler-rt
+		-Lliblwip \
+		-lbase -lcompiler-rt -llwip
 	@chmod -x $@
 
 ksupport.elf: $(OBJECTS_KSUPPORT)
@@ -71,8 +72,10 @@ main.o: main.c
 libs:
 	$(MAKE) -C $(MSCDIR)/software/libcompiler-rt
 	$(MAKE) -C $(MSCDIR)/software/libbase
+	$(MAKE) -C liblwip
 
 clean:
+	$(MAKE) -C liblwip clean
 	$(RM) $(OBJECTS) $(OBJECTS:.o=.d) $(OBJECTS_KSUPPORT) $(OBJECTS_KSUPPORT:.o=.d)
 	$(RM) runtime.elf runtime.bin runtime.fbi .*~ *~
 	$(RM) service_table.h ksupport.elf ksupport.bin

soc/runtime/liblwip/Makefile

@@ -32,7 +32,7 @@ CORE4OBJS=$(LWIPDIR)/core/ipv4/icmp.o \
 NETIFOBJS=$(LWIPDIR)/netif/etharp.o  \
 	netif/liteethif.o
 
-# NETIFOBJS: All the above.
+# LWIPOBJS: All the above.
 LWIPOBJS=$(COREOBJS) $(CORE4OBJS) $(NETIFOBJS)
 OBJS_LIB+=$(LWIPOBJS)
 

soc/runtime/liblwip/netif/liteethif.c

@@ -53,8 +53,6 @@ static void liteeth_low_level_init(struct netif *netif)
 
     rxbuffer = rxbuffer0;
     txbuffer = txbuffer0;
-
-  return;
 }
 
 static err_t liteeth_low_level_output(struct netif *netif, struct pbuf *p)
@@ -70,7 +68,7 @@ static err_t liteeth_low_level_output(struct netif *netif, struct pbuf *p)
 
     ethmac_sram_reader_slot_write(txslot);
     ethmac_sram_reader_length_write(txlen);
-  while(!(ethmac_sram_reader_ready_read()));
+    while(!ethmac_sram_reader_ready_read());
     ethmac_sram_reader_start_write(1);
 
     txslot = (txslot + 1) % 2;
@@ -108,10 +106,9 @@ void liteeth_input(struct netif *netif)
 {
     struct pbuf *p;
     p = liteeth_low_level_input(netif);
-  if (p != NULL) {
+    if(p != NULL)
         netif->input(p, netif);
 }
-}
 
 err_t liteeth_init(struct netif *netif)
 {