Replace fetch enable with a wfi trampoline bootrom

.github/scripts/check_sim.sh

@@ -8,7 +8,7 @@
 LOG_FILE=$1
 
 expected_lines=(
-  "\[CORE\] Start fetching instructions"
+  "\[CORE\] Waking core via CLINT msip"
   "\[JTAG\] Halting hart 0"
   "\[JTAG\] Resumed hart 0"
   "\[UART\] Hello World!"

Bender.yml

@@ -39,6 +39,7 @@ sources:
     files:
       # Level 1
       - rtl/core_wrap.sv
+      - rtl/bootrom/bootrom.sv
       - rtl/soc_ctrl/soc_ctrl_regs.sv
       - rtl/gpio/gpio_reg_top.sv
       - rtl/gpio/gpio.sv

README.md

@@ -54,6 +54,8 @@ The address map of the default configuration is as follows:
 | Start Address   | Stop Address    | Description                                |
 |-----------------|-----------------|--------------------------------------------|
 | `32'h0000_0000` | `32'h0004_0000` | Debug module (JTAG)                        |
+| `32'h0200_0000` | `32'h0200_4000` | Bootrom                                    |
+| `32'h0200_4000` | `32'h0200_8000` | CLINT peripheral                           |
 | `32'h0300_0000` | `32'h0300_1000` | SoC control/info registers                 |
 | `32'h0300_2000` | `32'h0300_3000` | UART peripheral                            |
 | `32'h0300_5000` | `32'h0300_6000` | GPIO peripheral                            |
@@ -62,7 +64,6 @@ The address map of the default configuration is as follows:
 | `32'h2000_0000` | `32'h8000_0000` | Passthrough to user domain                 |
 | `32'h2000_0000` | `32'h2000_1000` | reserved for string formatted user ROM*    |
 
-
 *If people modify Croc we suggest they add a ROM at this address containing additional information
 like the names of the developers, a project link or similar. This can then be written out via UART.  
 We ask people to format the ROM like a C string with zero termination and using ASCII encoding if feasible.  

artistic/src/croc.json

@@ -6,12 +6,12 @@
         "file"        : "../meerkat_work/croc_chip.gds.gz",
         "x_offset_um" : 0,
         "y_offset_um" : 0,
-        "width_um"    : 1930,
-        "height_um"   : 1930
+        "width_um"    : 2000,
+        "height_um"   : 2000
     },
     "image": {
-        "px_width"          : 965,
-        "px_height"         : 965,
+        "px_width"          : 1000,
+        "px_height"         : 1000,
         "overrender_factor" : 4,
         "num_segs_width"    : 1,
         "num_segs_height"   : 1,

artistic/src/croc_map.json

@@ -4,8 +4,8 @@
     },
     "gds" : {
         "file"        : "../meerkat_work/croc_chip.gds.gz",
-        "x_offset_um" : -59,
-        "y_offset_um" : -59,
+        "x_offset_um" : -24,
+        "y_offset_um" : -24,
         "width_um"    : 2048,
         "height_um"   : 2048
     },

artistic/src/croc_modules.json

@@ -27,6 +27,10 @@
         "name": "GPIO",
         "color": "#43fdaa"
     },
+    "i_bootrom": {
+        "name": "ROM",
+        "color": "#8cf805"
+    },
     "gen_sram_bank": {
         "name": "SRAM",
         "color": "#39729f"