Merge pull request #1026 from openhwgroup/dev

merge dev into master

Author: davideschiavone

bhv/cv32e40p_instr_trace.svh

@@ -802,7 +802,7 @@ class instr_trace_t;
       else str_hb = ".h";
 
       // set mnemonic
-      case (instr)
+      casex (instr)
         INSTR_CVADDH   ,
         INSTR_CVADDSCH ,
         INSTR_CVADDSCIH,

bhv/cv32e40p_rvfi.sv

@@ -1640,7 +1640,7 @@ insn_trace_t trace_if, trace_id, trace_ex, trace_ex_next, trace_wb;
           trace_wb.m_rd_wdata[0] = r_pipe_freeze_trace.rf_wdata_wb;
         end
 
-        if (r_pipe_freeze_trace.csr.fregs_we) begin
+        if(r_pipe_freeze_trace.csr.fregs_we && r_pipe_freeze_trace.rf_we_wb && r_pipe_freeze_trace.rf_addr_wb[5]) begin //Catching mstatus updates caused by flw
           `CSR_FROM_PIPE(wb, mstatus_fs)
           trace_wb.m_csr.mstatus_fs_we = 1'b1;
           trace_wb.m_csr.mstatus_fs_wmask = '1;

docs/source/conf.py

@@ -44,7 +44,7 @@
 # The short X.Y version
 version = u''
 # The full version, including alpha/beta/rc tags
-release = u'v1.8.0'
+release = u'v1.8.3'
 
 
 # -- General configuration ---------------------------------------------------

docs/source/corev_hw_loop.rst

@@ -181,7 +181,7 @@ If ebreak is used to enter in Debug Mode (:ref:`ebreak_scenario_2`) and put at t
 
 When ebreak instruction is used as Software Breakpoint by a debugger when in debug mode and is placed at the last instruction location of an HWLoop in instruction memory, no special management is foreseen.
 When executing the Software Breakpoint/ebreak instruction, control is given back to the debugger which will manage the different cases.
-For instance in Single-Step case, original instruction is put back in instruction memory, a Single-Step command is executed on this last instruction (with desgin updating PC and lpcountX to correct values) and Software Breakpoint/ebreak is put back by the debugger in memory.
+For instance in Single-Step case, original instruction is put back in instruction memory, a Single-Step command is executed on this last instruction (with design updating PC and lpcountX to correct values) and Software Breakpoint/ebreak is put back by the debugger in memory.
 
 When ecall instruction is used by a debugger to execute System Calls and is placed at the last instruction location of an HWLoop in instruction memory, debugger ecall handler in debug program should do the same than described above for application case.
 

docs/source/fpu.rst

@@ -163,9 +163,6 @@ host the floating-point operands.
 
 The latency of the individual instructions are explained in :ref:`instructions_latency_table` table.
 
-To allow FPU unit to be put in sleep mode at the same time the core is doing so, a clock gating cell is instantiated in ``cv32e40p_top`` top level module as well
-with its enable signal being inverted ``core_sleep_o`` core output.
-
 FP CSR
 ------
 
@@ -175,6 +172,11 @@ exceptions that occurred since it was last reset and the rounding mode.
 :ref:`csr-fflags` and :ref:`csr-frm` can be accessed directly or via :ref:`csr-fcsr` which is mapped to
 those two registers.
 
+FPU Sleeping mode
+-----------------
+
+To reduce power consumption, FPU clock is stopped when no FP instruction is being executed. To do so a dedicated clock gating cell is instantiated in ``cv32e40p_top`` top level module with its enable signal depending of both ``apu_req_o`` and ``apu_busy_o`` core outputs.
+
 Reminder for programmers
 ------------------------
 

docs/source/integration.rst

@@ -248,13 +248,55 @@ The ``constraints/cv32e40p_core.sdc`` file provides an example of synthesis cons
 ASIC Synthesis
 ^^^^^^^^^^^^^^
 
-ASIC synthesis is supported for CV32E40P. The whole design is completely
-synchronous and uses positive-edge triggered flip-flops. The
-core occupies an area of about XX kGE.
-With the FPU, the area increases to about XX kGE (XX kGE
-FPU, XX kGE additional register file). A technology specific implementation
-of a clock gating cell as described in :ref:`clock-gating-cell` needs to
-be provided.
+ASIC synthesis is supported for CV32E40P. The whole design is completely synchronous and uses positive-edge triggered flip-flops.
+
+To give some size numbers, it has been synthetized at 100 MHz with a 32 KB memory connected on each of its OBI interface, DFT scan chains have been implemented and it went down to full back-end implementation with Clock Tree synthesis.
+But no memory bist are inserted and there are no scan compression for DFT.
+
+And a technology specific implementation of a clock gating cell as described in :ref:`clock-gating-cell` has been provided.
+
+Following table gives CV32E40P size in Kilo-Gates numbers using a 2-input NAND gate with X1 drive for different top parameters settings (COREV_CLUSTER = 0 for all cases).
+
+.. table:: CV32E40P size
+  :name: CV32E40P size
+  :widths: 45 45 10
+  :class: no-scrollbar-table
+
+  +-----------------------+--------------------+--------+
+  | **Configuration**     | **Top Parameters** | **KG** |
+  +=======================+====================+========+
+  | V1                    | COREV_PULP = 0     | 40     |
+  |                       |                    |        |
+  |                       | FPU = 0            |        |
+  |                       |                    |        |
+  |                       | ZFINX = 0          |        |
+  +-----------------------+--------------------+--------+
+  | V2 PULP               | COREV_PULP = 1     | 57     |
+  |                       |                    |        |
+  |                       | FPU = 0            |        |
+  |                       |                    |        |
+  |                       | ZFINX = 0          |        |
+  +-----------------------+--------------------+--------+
+  | V2 PULP & FPU         | COREV_PULP = 1     | 93     |
+  |                       |                    |        |
+  |                       | FPU = 1            |        |
+  |                       |                    |        |
+  |                       | ZFINX = 0          |        |
+  |                       |                    |        |
+  |                       | FPU_ADDMUL_LAT = 0 |        |
+  |                       |                    |        |
+  |                       | FPU_OTHERS_LAT = 0 |        |
+  +-----------------------+--------------------+--------+
+  | V2 PULP & FPU & ZFINX | COREV_PULP = 1     | 77     |
+  |                       |                    |        |
+  |                       | FPU = 1            |        |
+  |                       |                    |        |
+  |                       | ZFINX = 1          |        |
+  |                       |                    |        |
+  |                       | FPU_ADDMUL_LAT = 0 |        |
+  |                       |                    |        |
+  |                       | FPU_OTHERS_LAT = 0 |        |
+  +-----------------------+--------------------+--------+
 
 FPGA Synthesis
 ^^^^^^^^^^^^^^^