Merge commit '38d5389f3054164a2f04d6e4e8fe381aa5ee03fc' into vrt

17 files changed, 89 insertions, 110 deletions

diff --git a/usrp2/firmware/apps/app_common_v2.c b/usrp2/firmware/apps/app_common_v2.c
index 6d9606d45..67cccd53b 100644
--- a/usrp2/firmware/apps/app_common_v2.c
+++ b/usrp2/firmware/apps/app_common_v2.c
@@ -70,6 +70,7 @@ void
 set_reply_hdr(u2_eth_packet_t *reply_pkt, u2_eth_packet_t const *cmd_pkt)
 {
   reply_pkt->ehdr.dst = cmd_pkt->ehdr.src;
+  reply_pkt->ehdr.src = *ethernet_mac_addr();
   reply_pkt->ehdr.ethertype = U2_ETHERTYPE;
   reply_pkt->thdr.flags = 0;
   reply_pkt->thdr.fifo_status = 0;	// written by protocol engine
@@ -599,7 +600,7 @@ bool
 eth_pkt_inspector(dbsm_t *sm, int bufno)
 {
   u2_eth_packet_t *pkt = (u2_eth_packet_t *) buffer_ram(bufno);
-  size_t byte_len = (buffer_pool_status->last_line[bufno] - 3) * 4;
+  size_t byte_len = (buffer_pool_status->last_line[bufno] - 1) * 4;
 
   //static size_t last_len = 0;
 
diff --git a/usrp2/firmware/apps/app_passthru_v2.c b/usrp2/firmware/apps/app_passthru_v2.c
index 660bcd774..406c56b3b 100644
--- a/usrp2/firmware/apps/app_passthru_v2.c
+++ b/usrp2/firmware/apps/app_passthru_v2.c
@@ -42,6 +42,7 @@ void
 set_reply_hdr(u2_eth_packet_t *reply_pkt, u2_eth_packet_t const *cmd_pkt)
 {
   reply_pkt->ehdr.dst = cmd_pkt->ehdr.src;
+  reply_pkt->ehdr.src = *ethernet_mac_addr();
   reply_pkt->ehdr.ethertype = U2_ETHERTYPE;
   reply_pkt->thdr.flags = 0;
   reply_pkt->thdr.fifo_status = 0;	// written by protocol engine
diff --git a/usrp2/firmware/apps/factory_test.c b/usrp2/firmware/apps/factory_test.c
index b4b44dbdb..a4bc06d58 100644
--- a/usrp2/firmware/apps/factory_test.c
+++ b/usrp2/firmware/apps/factory_test.c
@@ -170,6 +170,7 @@ start_rx_streaming_cmd(const u2_mac_addr_t *host, op_start_rx_streaming_t *p)
   u2_eth_packet_t	pkt;
   memset(&pkt, 0, sizeof(pkt));
   pkt.ehdr.dst = *host;
+  pkt.ehdr.src = *ethernet_mac_addr();
   pkt.ehdr.ethertype = U2_ETHERTYPE;
   u2p_set_word0(&pkt.fixed, 0, 0);
   // DSP RX will fill in timestamp
diff --git a/usrp2/firmware/apps/gen_eth_packets.c b/usrp2/firmware/apps/gen_eth_packets.c
index ce1e8160b..5cda5bb8e 100644
--- a/usrp2/firmware/apps/gen_eth_packets.c
+++ b/usrp2/firmware/apps/gen_eth_packets.c
@@ -104,8 +104,7 @@ init_packets(void)
   memset(&pkt, 0, sizeof(pkt));
 
   pkt.ehdr.dst = dst_mac_addr;
-  // src address filled in by mac
-
+  pkt.ehdr.src = *ethernet_mac_addr();
   pkt.ehdr.ethertype = U2_ETHERTYPE;
   pkt.fixed.word0 = 0x01234567;
   pkt.fixed.timestamp = 0xffffffff;
@@ -141,10 +140,12 @@ main(void)
   ethernet_register_link_changed_callback(link_changed_callback);
   ethernet_init();
 
+  /*
   if (hwconfig_simulation_p()){
     eth_mac->speed = 4;	// hardcode mac speed to 1000
     link_is_up = true;
   }
+  */
 
   // fire off a receive from the ethernet
   bp_receive_to_buf(CPU_RX_BUF, PORT_ETH, 1, 0, BP_LAST_LINE);
@@ -159,10 +160,15 @@ main(void)
     }
 
     if (status & (BPS_DONE(CPU_TX_BUF) | BPS_ERROR(CPU_TX_BUF))){
+      if (status & BPS_ERROR(CPU_TX_BUF)){
+	putchar('E');
+      }
       bp_clear_buf(CPU_TX_BUF);
       npackets_sent++;
-      if ((npackets_sent & 0xF) == 0)	// print after every 16 packets
-	print_rmon_regs();
+      if ((npackets_sent & 0xF) == 0){	// print after every 16 packets
+	//print_rmon_regs();
+	putchar('.');
+      }
     }
 
     if (link_is_up && send_packet_now && (status & BPS_IDLE(CPU_TX_BUF))){
diff --git a/usrp2/firmware/apps/gen_pause_frames.c b/usrp2/firmware/apps/gen_pause_frames.c
index 4eaebcc4a..8f2b2df03 100644
--- a/usrp2/firmware/apps/gen_pause_frames.c
+++ b/usrp2/firmware/apps/gen_pause_frames.c
@@ -132,9 +132,9 @@ init_packets(void)
   u2_eth_packet_t	pkt __attribute__((aligned (4)));
 
   for (i = 0; i < 6; i++){
-    pkt.ehdr.dst_addr[i] = dst_mac_addr[i];
-    pkt.ehdr.src_addr[i] = 0;			// filled in by mac
+    pkt.ehdr.dst.addr[i] = dst_mac_addr[i];
   }
+  pkt.ehdr.src = *ethernet_mac_addr();
   pkt.ehdr.ethertype = U2_ETHERTYPE;
 
   // fill ALL buffers for debugging
diff --git a/usrp2/firmware/apps/mimo_app_common_v2.c b/usrp2/firmware/apps/mimo_app_common_v2.c
index e5ab55fac..5dbecb0d0 100644
--- a/usrp2/firmware/apps/mimo_app_common_v2.c
+++ b/usrp2/firmware/apps/mimo_app_common_v2.c
@@ -67,6 +67,7 @@ void
 set_reply_hdr(u2_eth_packet_t *reply_pkt, u2_eth_packet_t const *cmd_pkt)
 {
   reply_pkt->ehdr.dst = cmd_pkt->ehdr.src;
+  reply_pkt->ehdr.src = *ethernet_mac_addr();
   reply_pkt->ehdr.ethertype = U2_ETHERTYPE;
   reply_pkt->thdr.flags = 0;
   reply_pkt->thdr.fifo_status = 0;	// written by protocol engine
diff --git a/usrp2/firmware/apps/mimo_tx.c b/usrp2/firmware/apps/mimo_tx.c
index 730433bf4..7fc7b486f 100644
--- a/usrp2/firmware/apps/mimo_tx.c
+++ b/usrp2/firmware/apps/mimo_tx.c
@@ -179,6 +179,7 @@ start_rx_streaming_cmd(const u2_mac_addr_t *host, op_start_rx_streaming_t *p)
   u2_eth_packet_t	pkt;
   memset(&pkt, 0, sizeof(pkt));
   pkt.ehdr.dst = *host;
+  pkt.ehdr.src = *ethernet_mac_addr();
   pkt.ehdr.ethertype = U2_ETHERTYPE;
   u2p_set_word0(&pkt.fixed, 0, 0);
   // DSP RX will fill in timestamp
diff --git a/usrp2/firmware/apps/mimo_tx_slave.c b/usrp2/firmware/apps/mimo_tx_slave.c
index df7ddf9c4..e7da984c5 100644
--- a/usrp2/firmware/apps/mimo_tx_slave.c
+++ b/usrp2/firmware/apps/mimo_tx_slave.c
@@ -176,6 +176,7 @@ start_rx_streaming_cmd(const u2_mac_addr_t *host, op_start_rx_streaming_t *p)
   u2_eth_packet_t	pkt;
   memset(&pkt, 0, sizeof(pkt));
   pkt.ehdr.dst = *host;
+  pkt.ehdr.src = *ethernet_mac_addr();
   pkt.ehdr.ethertype = U2_ETHERTYPE;
   u2p_set_word0(&pkt.fixed, 0, 0);
   // DSP RX will fill in timestamp
diff --git a/usrp2/firmware/apps/rcv_eth_packets.c b/usrp2/firmware/apps/rcv_eth_packets.c
index 92e41d92b..ec772ca75 100644
--- a/usrp2/firmware/apps/rcv_eth_packets.c
+++ b/usrp2/firmware/apps/rcv_eth_packets.c
@@ -135,7 +135,7 @@ init_packets(void)
   u2_eth_packet_t	pkt __attribute__((aligned (4)));
 
   pkt.ehdr.dst = dst_mac_addr;
-  // src filled in by mac
+  pkt.ehdr.src = *ethernet_mac_addr();
   pkt.ehdr.ethertype = U2_ETHERTYPE;
 
   // fill ALL buffers for debugging
diff --git a/usrp2/firmware/apps/serdes_txrx.c b/usrp2/firmware/apps/serdes_txrx.c
index 1becc205e..7816f7a65 100644
--- a/usrp2/firmware/apps/serdes_txrx.c
+++ b/usrp2/firmware/apps/serdes_txrx.c
@@ -168,6 +168,7 @@ start_rx_streaming_cmd(const u2_mac_addr_t *host, op_start_rx_streaming_t *p)
   u2_eth_packet_t	pkt;
   memset(&pkt, 0, sizeof(pkt));
   pkt.ehdr.dst = *host;
+  pkt.ehdr.src = *ethernet_mac_addr();
   pkt.ehdr.ethertype = U2_ETHERTYPE;
   u2p_set_word0(&pkt.fixed, 0, 0);
   // DSP RX will fill in timestamp
diff --git a/usrp2/firmware/apps/tx_standalone.c b/usrp2/firmware/apps/tx_standalone.c
index 25ba8fd40..6350a6956 100644
--- a/usrp2/firmware/apps/tx_standalone.c
+++ b/usrp2/firmware/apps/tx_standalone.c
@@ -195,6 +195,7 @@ start_tx_transfers(void)
   u2_eth_packet_t	pkt;
   memset(&pkt, 0, sizeof(pkt));
   //pkt.ehdr.dst = *host;
+  pkt.ehdr.src = *ethernet_mac_addr();
   pkt.ehdr.ethertype = U2_ETHERTYPE;
   u2p_set_word0(&pkt.fixed,
 		U2P_TX_IMMEDIATE | U2P_TX_START_OF_BURST, 0);
diff --git a/usrp2/firmware/apps/txrx.c b/usrp2/firmware/apps/txrx.c
index 730ee66c5..b2487ed89 100644
--- a/usrp2/firmware/apps/txrx.c
+++ b/usrp2/firmware/apps/txrx.c
@@ -168,6 +168,7 @@ start_rx_streaming_cmd(const u2_mac_addr_t *host, op_start_rx_streaming_t *p)
   u2_eth_packet_t	pkt;
   memset(&pkt, 0, sizeof(pkt));
   pkt.ehdr.dst = *host;
+  pkt.ehdr.src = *ethernet_mac_addr();
   pkt.ehdr.ethertype = U2_ETHERTYPE;
   u2p_set_word0(&pkt.fixed, 0, 0);
   // DSP RX will fill in timestamp
@@ -257,14 +258,13 @@ main(void)
 {
   u2_init();
 
-  putstr("\nTxRx\n");
+  putstr("\nTxRx-NEWETH\n");
   print_mac_addr(ethernet_mac_addr()->addr);
   newline();
 
   ethernet_register_link_changed_callback(link_changed_callback);
   ethernet_init();
 
-
 #if 0
   // make bit 15 of Tx gpio's be a s/w output
   hal_gpio_set_sel(GPIO_TX_BANK, 15, 's');
diff --git a/usrp2/firmware/lib/.gitignore b/usrp2/firmware/lib/.gitignore
index f1cc2bf73..5d838bf6c 100644
--- a/usrp2/firmware/lib/.gitignore
+++ b/usrp2/firmware/lib/.gitignore
@@ -1,3 +1,4 @@
+*~
 /*-stamp
 /*.a
 /*.bin
diff --git a/usrp2/firmware/lib/dbsm.c b/usrp2/firmware/lib/dbsm.c
index 8f774d916..96484d577 100644
--- a/usrp2/firmware/lib/dbsm.c
+++ b/usrp2/firmware/lib/dbsm.c
@@ -62,7 +62,8 @@ dbsm_init(dbsm_t *sm, int buf0,
 
   // How much to adjust the last_line register.
   // It's 1 for everything but the ethernet.
-  sm->last_line_adj = recv->port == PORT_ETH ? 3 : 1;
+  //sm->last_line_adj = recv->port == PORT_ETH ? 3 : 1;
+  sm->last_line_adj = 1;
 
   buffer_state[sm->buf0] = BS_EMPTY;
   buffer_state[sm->buf0 ^ 1] = BS_EMPTY;
diff --git a/usrp2/firmware/lib/eth_mac.c b/usrp2/firmware/lib/eth_mac.c
index 5fadaf40b..88051dca0 100644
--- a/usrp2/firmware/lib/eth_mac.c
+++ b/usrp2/firmware/lib/eth_mac.c
@@ -21,38 +21,21 @@
 #include "bool.h"
 #include "eth_phy.h"	// for simulation constants
 #include "mdelay.h"
-
+#include "stdio.h"
 
 #define PHY_ADDR 1
 
 void
 eth_mac_set_addr(const u2_mac_addr_t *src)
 {
-  int i;
-
-  // tell mac our source address and enable automatic insertion on Tx.
-  eth_mac->mac_tx_add_prom_wr = 0;	// just in case
-  for (i = 0; i < 6; i++){
-    eth_mac->mac_tx_add_prom_add = i;
-    eth_mac->mac_tx_add_prom_data = src->addr[i];
-    eth_mac->mac_tx_add_prom_wr = 1;
-    mdelay(1);
-    eth_mac->mac_tx_add_prom_wr = 0;
-    mdelay(1);
-  }
-  eth_mac->mac_tx_add_en = 1;  // overwrite pkt src addr field with this stuff
-
-  // set up receive destination address filter
-  eth_mac->mac_rx_add_prom_wr = 0;	// just in case
-  for (i = 0; i < 6; i++){
-    eth_mac->mac_rx_add_prom_add = i;
-    eth_mac->mac_rx_add_prom_data = src->addr[i];
-    eth_mac->mac_rx_add_prom_wr = 1;
-    mdelay(1);
-    eth_mac->mac_rx_add_prom_wr = 0;
-    mdelay(1);
-  }
-  // eth_mac->mac_rx_add_chk_en = 1;  // FIXME enable when everything's working
+  eth_mac->ucast_hi = 
+    (((unsigned int)src->addr[0])<<8) + 
+    ((unsigned int)src->addr[1]);
+  eth_mac->ucast_lo = 
+    (((unsigned int)src->addr[2])<<24) + 
+    (((unsigned int)src->addr[3])<<16) +
+    (((unsigned int)src->addr[4])<<8) +
+    (((unsigned int)src->addr[5]));
 }
 
 
@@ -62,14 +45,18 @@ eth_mac_init(const u2_mac_addr_t *src)
   eth_mac->miimoder = 25;	// divider from CPU clock (50MHz/25 = 2MHz)
 
   eth_mac_set_addr(src);
+  eth_mac->settings = MAC_SET_PAUSE_EN | MAC_SET_PASS_BCAST | MAC_SET_PASS_UCAST | MAC_SET_PAUSE_SEND_EN; 
+
+  eth_mac->pause_time = 38;
+  eth_mac->pause_thresh = 1200;
 
   // set rx flow control high and low water marks
   // unsigned int lwmark = (2*2048 + 64)/4; // 2 * 2048-byte frames + 1 * 64-byte pause frame
   // eth_mac->fc_hwmark = lwmark + 2048/4;  // plus a 2048-byte frame
 
-  eth_mac->fc_lwmark = 600;		// there are currently 2047 lines in the fifo
-  eth_mac->fc_hwmark = 1200;
-  eth_mac->fc_padtime = 1700;           // how long before flow control runs out do we 
+  //  eth_mac->fc_lwmark = 600;		// there are currently 2047 lines in the fifo
+  // eth_mac->fc_hwmark = 1200;
+  //eth_mac->fc_padtime = 1700;           // how long before flow control runs out do we 
                                         // request a re-pause.  Units of 8ns (bytes)
 
   //eth_mac->tx_pause_en = 0;		// pay attn to pause frames sent to us
@@ -80,8 +67,8 @@ eth_mac_init(const u2_mac_addr_t *src)
 int
 eth_mac_read_rmon(int addr)
 {
-  int t;
-  
+  int t = 0;
+  /*  
   eth_mac->rmon_rd_addr = addr;
   eth_mac->rmon_rd_apply = 1;
   while(eth_mac->rmon_rd_grant == 0)
@@ -89,6 +76,7 @@ eth_mac_read_rmon(int addr)
 
   t = eth_mac->rmon_rd_dout;
   eth_mac->rmon_rd_apply = 0;
+  */
   return t;
 }
 
@@ -111,7 +99,9 @@ eth_mac_miim_read(int addr)
   while((eth_mac->miistatus & MIIS_BUSY) != 0)
     ;
 
-  return eth_mac->miirx_data;
+  int r = eth_mac->miirx_data;
+  //printf("MIIM-READ ADDR 0x%x DATA 0x%x\n",addr, r);
+  return r;
 }
 
 void
@@ -122,6 +112,7 @@ eth_mac_miim_write(int addr, int value)
   eth_mac->miitx_data = value;
   eth_mac->miicommand = MIIC_WCTRLDATA;
 
+  //printf("MIIM-WRITE ADDR 0x%x VAL 0x%x\n",addr,value);
   while((eth_mac->miistatus & MIIS_BUSY) != 0)
     ;
 }
diff --git a/usrp2/firmware/lib/eth_mac_regs.h b/usrp2/firmware/lib/eth_mac_regs.h
index 8daab937d..d680f8de0 100644
--- a/usrp2/firmware/lib/eth_mac_regs.h
+++ b/usrp2/firmware/lib/eth_mac_regs.h
@@ -20,70 +20,34 @@
 #define INCLUDED_ETH_MAC_REGS_H
 
 /*
- * See opencores.org 10_100_1000 Mbps Tri-mode Ethernet MAC Specification
+ * Simple GEMAC
  *
- * In reality, these are 16-bit regs, but are assigned
- * on 32-bit boundaries.  Because we're little endian,
- * declaring them "int" works.
  */
 typedef struct {
-  volatile int	tx_hwmark;
-  volatile int	tx_lwmark;
-
-  //! if set, send pause frames automatically
-  volatile int	pause_frame_send_en;
-
-  //! quanta value for pause frame in units of 512 bit times.
-  volatile int	pause_quanta_set;
-
-  volatile int	ifg_set;
-  volatile int	full_duplex;
-  volatile int	max_retry;
-  volatile int	mac_tx_add_en;
-  volatile int	mac_tx_add_prom_data;
-  volatile int	mac_tx_add_prom_add;
-  volatile int	mac_tx_add_prom_wr;
-
-  //! if set, other end can pause us (i.e., we pay attention to pause frames)
-  volatile int	tx_pause_en;
-
-  // Flow Control high and low water marks
-  //! when space available (in 32-bit lines) > hwmark, send un-pause frame
-  volatile int	fc_hwmark;	
-
-  //! when space avail (in 32-bit lines) < lwmark, send pause frame
-  volatile int	fc_lwmark;	
-
-  volatile int	mac_rx_add_chk_en;
-  volatile int	mac_rx_add_prom_data;
-  volatile int	mac_rx_add_prom_add;
-  volatile int	mac_rx_add_prom_wr;
-  volatile int	broadcast_filter_en;
-  volatile int	broadcast_bucket_depth;
-  volatile int	broadcast_bucket_interval;
-  volatile int	rx_append_crc;
-  volatile int	rx_hwmark;
-  volatile int	rx_lwmark;
-  volatile int	crc_chk_en;
-  volatile int	rx_ifg_set;
-  volatile int	rx_max_length;
-  volatile int	rx_min_length;
-  volatile int	rmon_rd_addr;		// performance counter access
-  volatile int	rmon_rd_apply;		
-  volatile int	rmon_rd_grant;		// READONLY
-  volatile int	rmon_rd_dout;	        // READONLY
-  volatile int	dummy;	// READONLY
-  volatile int	line_loop_en;
-  volatile int	speed;
-  volatile int	miimoder;
-  volatile int	miicommand;
-  volatile int	miiaddress;
-  volatile int	miitx_data;
-  volatile int	miirx_data;
-  volatile int	miistatus;
-  volatile int	fc_padtime;
+  volatile int settings;
+  volatile int ucast_hi;
+  volatile int ucast_lo;
+  volatile int mcast_hi;
+  volatile int mcast_lo;
+  volatile int miimoder;
+  volatile int miiaddress;
+  volatile int miitx_data;
+  volatile int miicommand;
+  volatile int miistatus;
+  volatile int miirx_data;
+  volatile int pause_time;
+  volatile int pause_thresh;
 } eth_mac_regs_t;
 
+// settings register
+#define MAC_SET_PAUSE_EN  (1 << 0)   // Makes us respect received pause frames (normally on)
+#define MAC_SET_PASS_ALL  (1 << 1)   // Enables promiscuous mode, currently broken
+#define MAC_SET_PASS_PAUSE (1 << 2)  // Sends pause frames through (normally off)
+#define MAC_SET_PASS_BCAST (1 << 3)  // Sends broadcast frames through (normally on)
+#define MAC_SET_PASS_MCAST (1 << 4)  // Sends multicast frames that match mcast addr (normally off)
+#define MAC_SET_PASS_UCAST (1 << 5)  // Sends unicast (normal) frames through if they hit in address filter (normally on)
+#define MAC_SET_PAUSE_SEND_EN (1 << 6) // Enables sending pause frames
+
 // miicommand register
 #define MIIC_SCANSSTAT	(1 << 0)	// Scan status
 #define MIIC_RSTAT      (1 << 1)	// Read status
diff --git a/usrp2/firmware/lib/ethernet.c b/usrp2/firmware/lib/ethernet.c
index d19287044..f554e0179 100644
--- a/usrp2/firmware/lib/ethernet.c
+++ b/usrp2/firmware/lib/ethernet.c
@@ -43,6 +43,8 @@ ethernet_register_link_changed_callback(ethernet_link_changed_callback_t new_cal
 static void
 ed_set_mac_speed(int speed)
 {
+  printf("Speed set to %d\n",speed);
+  /*
   switch(speed){
   case 10:
     eth_mac->speed = 1;
@@ -56,6 +58,7 @@ ed_set_mac_speed(int speed)
   default:
     break;
   }
+  */
 }
 
 static void
@@ -196,17 +199,17 @@ ethernet_init(void)
   ed_state.link_speed = S_UNKNOWN;
 
   // initialize MAC registers
-  eth_mac->tx_hwmark = 0x1e;
-  eth_mac->tx_lwmark = 0x19;
+  //  eth_mac->tx_hwmark = 0x1e;
+  //eth_mac->tx_lwmark = 0x19;
 
-  eth_mac->crc_chk_en = 1;
-  eth_mac->rx_max_length = 2048;
+  //eth_mac->crc_chk_en = 1;
+  //eth_mac->rx_max_length = 2048;
 
   // configure PAUSE frame stuff
-  eth_mac->tx_pause_en = 1;		// pay attn to pause frames sent to us
+  //eth_mac->tx_pause_en = 1;		// pay attn to pause frames sent to us
 
-  eth_mac->pause_quanta_set = 38;	// a bit more than 1 max frame 16kb/512 + fudge
-  eth_mac->pause_frame_send_en = 1;	// enable sending pause frames
+  //eth_mac->pause_quanta_set = 38;	// a bit more than 1 max frame 16kb/512 + fudge
+  //eth_mac->pause_frame_send_en = 1;	// enable sending pause frames
 
 
   // setup PHY to interrupt on changes
@@ -256,6 +259,10 @@ ethernet_init(void)
   t &= ~(NWAY_AR_10T_HD_CAPS | NWAY_AR_10T_FD_CAPS | NWAY_AR_100TX_HD_CAPS | NWAY_AR_100TX_FD_CAPS);
 
   eth_mac_miim_write(PHY_AUTONEG_ADV, t);
+  int r = eth_mac_miim_read(PHY_AUTONEG_ADV);  		// DEBUG, read back
+  if (t != r){
+    printf("PHY_AUTONEG_ADV: wrote 0x%x, got 0x%x\n", t, r);
+  }
 
   // Restart autonegotation.  
   // We want to ensure that we're advertising our PAUSE capabilities.
@@ -322,6 +329,7 @@ ethernet_check_errors(void)
   // these registers are reset when read
   
   int	r = 0;
+  /*
   if (eth_mac_read_rmon(0x05) != 0)
     r |= RME_RX_CRC;
   if (eth_mac_read_rmon(0x06) != 0)
@@ -335,6 +343,6 @@ ethernet_check_errors(void)
     r |= RME_TX_FIFO_UNDER;
   if (eth_mac_read_rmon(0x27) != 0)
     r |= RME_TX_FIFO_OVER;
-
+  */
   return r;
 }