From 4dfbb9894607b164df57be383b775d2d898bb435 Mon Sep 17 00:00:00 2001
From: Mark Pizzolato <mark@infocomm.com>
Date: Wed, 24 Feb 2016 09:02:17 -0800
Subject: [PATCH] PDP11, VAX: Add detailed receive descriptor list usage debug
 information.

---
 PDP11/pdp11_xu.c | 12 ++++++++++++
 PDP11/pdp11_xu.h |  9 +++++++++
 2 files changed, 21 insertions(+)

diff --git a/PDP11/pdp11_xu.c b/PDP11/pdp11_xu.c
index 55dc704b..4e85f63e 100644
--- a/PDP11/pdp11_xu.c
+++ b/PDP11/pdp11_xu.c
@@ -1219,6 +1219,9 @@ void xu_process_receive(CTLR* xu)
     if (!(xu->var->rxhdr[2] & RXR_OWN)) {
       /* tell the host there are no more buffers */
       /* xu->var->pcsr0 |= PCSR0_RCBI; */ /* I don't think this is correct 08-dec-2005 dth */
+      sim_debug(DBG_TRC, xu->dev, "Stopping input processing - Not Owned receive descriptor=0x%X, slen=0x%04X(%d), segb=0x%04X, ", ba, slen, slen, segb);
+      sim_debug_bits(DBG_TRC, xu->dev, xu_rdes_w2, xu->var->rxhdr[2], xu->var->rxhdr[2], 0);
+      sim_debug_bits(DBG_TRC, xu->dev, xu_rdes_w3, xu->var->rxhdr[3], xu->var->rxhdr[3], 1);
       break;
     }
 
@@ -1265,6 +1268,11 @@ void xu_process_receive(CTLR* xu)
     if (wlen > slen)
       wlen = slen;
 
+    sim_debug(DBG_TRC, xu->dev, "Using receive descriptor=0x%X, slen=0x%04X(%d), segb=0x%04X, ", ba, slen, slen, segb);
+    sim_debug_bits(DBG_TRC, xu->dev, xu_rdes_w2, xu->var->rxhdr[2], xu->var->rxhdr[2], 0);
+    sim_debug_bits(DBG_TRC, xu->dev, xu_rdes_w3, xu->var->rxhdr[3], xu->var->rxhdr[3], 0);
+    sim_debug(DBG_TRC, xu->dev, ", pktlen=0x%X(%d), used=0x%X, wlen=0x%X\n", item->packet.len, item->packet.len, item->packet.used, wlen);
+
     /* transfer chained packet to host buffer */
     wstatus = Map_WriteB (segb, wlen, &item->packet.msg[item->packet.used]);
     if (wstatus) {
@@ -1327,6 +1335,10 @@ void xu_process_receive(CTLR* xu)
     /* give buffer back to host */
     xu->var->rxhdr[2] &= ~RXR_OWN;              /* clear ownership flag */
 
+    sim_debug(DBG_TRC, xu->dev, "Updating receive descriptor=0x%X, slen=0x%04X, segb=0x%04X, ", ba, slen, segb);
+    sim_debug_bits(DBG_TRC, xu->dev, xu_rdes_w2, xu->var->rxhdr[2], xu->var->rxhdr[2], 0);
+    sim_debug_bits(DBG_TRC, xu->dev, xu_rdes_w3, xu->var->rxhdr[3], xu->var->rxhdr[3], 1);
+
     /* update the ring entry in host memory. */
     wstatus = Map_WriteW (ba, 8, xu->var->rxhdr);
     if (wstatus) {
diff --git a/PDP11/pdp11_xu.h b/PDP11/pdp11_xu.h
index 85026ff3..3192a138 100644
--- a/PDP11/pdp11_xu.h
+++ b/PDP11/pdp11_xu.h
@@ -303,6 +303,15 @@ typedef struct xu_controller CTLR;
 #define RXR_OVRN  0010000                               /* <12> Overrun Error [DELUA only] */
 #define RXR_MLEN  0007777                               /* <11:0> Message Length */
 
+BITFIELD xu_rdes_w2[] = {
+  BITNCF(8), BIT(ENP), BIT(STP), BITNC, BIT(CRC), BIT(OFLO), BIT(FRAM), BIT(ERRS), BIT(OWN),
+  ENDBITS
+};
+BITFIELD xu_rdes_w3[] = {
+  BITFFMT(mlen,12,"0x%X"), BITNC, BIT(NCHN), BIT(UBTO), BIT(BUFL),
+  ENDBITS
+};
+
 /* debugging bitmaps */
 #define DBG_TRC  0x0001                                 /* trace routine calls */
 #define DBG_REG  0x0002                                 /* trace read/write registers */