dram_fifo, BIST: BUS_CLK_RATE is now a readback reg.

2 files changed, 15 insertions, 4 deletions

diff --git a/host/lib/usrp/cores/dma_fifo_core_3000.cpp b/host/lib/usrp/cores/dma_fifo_core_3000.cpp
index 18c79f4c5..b80ce62d8 100644
--- a/host/lib/usrp/cores/dma_fifo_core_3000.cpp
+++ b/host/lib/usrp/cores/dma_fifo_core_3000.cpp
@@ -20,7 +20,7 @@
 #include <boost/thread/thread.hpp> //sleep
 #include <uhd/utils/soft_register.hpp>
 #include <uhd/utils/log.hpp>
-
+#include <boost/format.hpp>
 using namespace uhd;
 
 #define SR_DRAM_BIST_BASE 16
@@ -40,6 +40,7 @@ protected:
         static const uint32_t RB_BIST_STATUS     = 1;
         static const uint32_t RB_BIST_XFER_CNT   = 2;
         static const uint32_t RB_BIST_CYC_CNT    = 3;
+        static const uint32_t RB_BUS_CLK_RATE    = 4;
 
         rb_addr_reg_t(uint32_t base):
             soft_reg32_wo_t(base + 0)
@@ -214,6 +215,14 @@ public:
             return (static_cast<double>(xfer_cnt)/cyc_cnt);
         }
 
+        double get_bus_clk_rate() {
+            uint32_t bus_clk_rate = 0;
+            boost::lock_guard<boost::mutex> lock(_mutex);
+            _addr_reg.write(rb_addr_reg_t::ADDR, rb_addr_reg_t::RB_BUS_CLK_RATE);
+            bus_clk_rate = _iface->peek32(_rb_addr);
+            return (static_cast<double>(bus_clk_rate));
+        }
+
     private:
         wb_iface::sptr  _iface;
         rb_addr_reg_t   _addr_reg;
@@ -326,11 +335,13 @@ public:
         return _fifo_readback.get_bist_status().error;
     }
 
-    virtual double get_bist_throughput(double fifo_clock_rate) {
+    virtual double get_bist_throughput() {
         if (_has_ext_bist) {
             _wait_for_bist_done(1000);
             static const double BYTES_PER_CYC = 8;
-            return _fifo_readback.get_xfer_ratio() * fifo_clock_rate * BYTES_PER_CYC;
+            double bus_clk_rate = _fifo_readback.get_bus_clk_rate();
+            UHD_LOGGER_INFO("DEBUG") << boost::format("[DMA FIFO] Clock rate for BIST calculation: %d ") % bus_clk_rate;
+            return _fifo_readback.get_xfer_ratio() * bus_clk_rate * BYTES_PER_CYC;
         } else {
             throw uhd::not_implemented_error(
                 "dma_fifo_core_3000: Throughput counter only available on FPGA images with extended BIST enabled");
diff --git a/host/lib/usrp/cores/dma_fifo_core_3000.hpp b/host/lib/usrp/cores/dma_fifo_core_3000.hpp
index 46a913c93..55a126f76 100644
--- a/host/lib/usrp/cores/dma_fifo_core_3000.hpp
+++ b/host/lib/usrp/cores/dma_fifo_core_3000.hpp
@@ -79,7 +79,7 @@ public:
     /*!
      * Get the throughput measured from the last invocation of the BIST (extended BIST only)
      */
-    virtual double get_bist_throughput(double fifo_clock_rate) = 0;
+    virtual double get_bist_throughput() = 0;
 
 };