Implement bctr and mtspr

[soc.git] / src / soc / decoder / power_enums.py

diff --git a/src/soc/decoder/power_enums.py b/src/soc/decoder/power_enums.py
index cfa0bacb05766fe5f37a3f80ac357d030d0ea302..79805527b980a6e43d4ec34f98768bd1a6d7fd89 100644 (file)
--- a/src/soc/decoder/power_enums.py
+++ b/src/soc/decoder/power_enums.py
@@ -1,22 +1,22 @@
 from enum import Enum, unique
 import csv
 import os
-import requests
+from os.path import dirname, join
+from collections import namedtuple
 
+def find_wiki_file(name):
+    filedir = os.path.dirname(os.path.abspath(__file__))
+    basedir = dirname(dirname(dirname(filedir)))
+    tabledir = join(basedir, 'libreriscv')
+    tabledir = join(tabledir, 'openpower')
+    tabledir = join(tabledir, 'isatables')
 
-def download_wiki_file(name):
-    file_dir = os.path.dirname(os.path.realpath(__file__))
-    file_path = os.path.join(file_dir, name)
-    if not os.path.isfile(file_path):
-        url = 'https://libre-riscv.org/openpower/isatables/' + name
-        r = requests.get(url, allow_redirects=True)
-        with open(file_path, 'w') as outfile:
-            outfile.write(r.content.decode("utf-8"))
+    file_path = join(tabledir, name)
     return file_path
 
 
 def get_csv(name):
-    file_path = download_wiki_file(name)
+    file_path = find_wiki_file(name)
     with open(file_path, 'r') as csvfile:
         reader = csv.DictReader(csvfile)
         return list(reader)
@@ -29,9 +29,10 @@ single_bit_flags = ['CR in', 'CR out', 'inv A', 'inv out',
 
 # default values for fields in the table
 default_values = {'unit': "NONE", 'internal op': "OP_ILLEGAL",
-                   'in1': "RA", 'in2': 'NONE', 'in3': 'NONE', 'out': 'NONE',
-                   'ldst len': 'NONE',
-                   'rc' : 'NONE', 'cry in' : 'ZERO', 'form': 'NONE'}
+                  'in1': "RA", 'in2': 'NONE', 'in3': 'NONE', 'out': 'NONE',
+                  'ldst len': 'NONE',
+                  'rc': 'NONE', 'cry in': 'ZERO', 'form': 'NONE'}
+
 
 def get_signal_name(name):
     if name[0].isdigit():
@@ -217,9 +218,9 @@ class CryIn(Enum):
 
 # SPRs - Special-Purpose Registers.  See V3.0B Figure 18 p971 and
 # http://libre-riscv.org/openpower/isatables/sprs.csv
-# TODO: make this read the sprs.csv file
 # http://bugs.libre-riscv.org/show_bug.cgi?id=261
 
 spr_csv = get_csv("sprs.csv")
-fields = [(row['SPR'], row['Idx']) for row in spr_csv]
+spr_info = namedtuple('spr_info', 'SPR priv_mtspr priv_mfspr len')
+fields = [(row['SPR'], int(row['Idx'])) for row in spr_csv]
 SPR = Enum('SPR', fields)