1 files changed, 170 insertions, 0 deletions

diff --git a/meta-xilinx-standalone-sdt/scripts/microblaze_dtb.py b/meta-xilinx-standalone-sdt/scripts/microblaze_dtb.py
new file mode 100644
index 00000000..343ae10e
--- /dev/null
+++ b/meta-xilinx-standalone-sdt/scripts/microblaze_dtb.py
@@ -0,0 +1,170 @@
+import argparse
+import libfdt
+import os
+import sys
+
+# Format: FEATURE : (dtb property, condition_operator, condition_value)
+# If dtb property is None, then the item is always on
+#
+# If the condition_operator is None, then enable if it exists for existance
+#
+# If the condition_operator is '!', and condition_value is None then enable if
+#    if is not defined
+#
+# Otherwise 'condition' and value are evaluated by type.
+#
+# If the condition is = then any value of condition_values will set it
+# If the condition is ! then no value of condition_values will set it
+
+microblaze_tune_features = {
+  'microblaze' :      (None,                     None, None),
+  'bigendian':        ('xlnx,endianness',        '!', 1),
+  '64-bit' :          ('xlnx,data-size',         '=', 64),
+  'barrel-shift':     ('xlnx,use-barrel',        '=', 1),
+  'pattern-compare':  ('xlnx,use-pcmp-instr',    '=', 1),
+  'reorder'   :       ('xlnx,use-reorder-instr', '!', 0),
+  'frequency-optimized': ('xlnx,area-optimized', '=', 2),
+  'multiply-low':     ('xlnx,use-hw-mul',        '=', 1),
+  'multiply-high':    ('xlnx,use-hw-mul',        '=', 2),
+  'divide-hard':      ('xlnx,use-div',           '=', 1),
+  'fpu-soft':         ('xlnx,use-fpu',           '!', [1,2]),
+  'fpu-hard':         ('xlnx,use-fpu',           '=', 1),
+  'fpu-hard-extended':('xlnx,use-fpu',           '=', 2),
+}
+
+def processProperties(fdt, node):
+    TUNE_FEATURES = []
+
+    for feature in microblaze_tune_features:
+        (property, cop, cvalue) = microblaze_tune_features[feature]
+
+        if not property:
+            TUNE_FEATURES.append(feature)
+
+            # Special processing to get the version
+            if feature == "microblaze":
+                ver = microblazeVersion(fdt, node)
+                if ver:
+                    TUNE_FEATURES.append(ver)
+            continue
+
+        prop_value = fdt.getprop( node, property, libfdt.QUIET_NOTFOUND)
+
+        if not prop_value or prop_value == -1:
+            if cop == '!':
+                if not cvalue:
+                    TUNE_FEATURES.append(ver)
+                    continue
+            continue
+
+        # If no operator
+        if not cop or (cop == '=' and not cvalue):
+            TUNE_FEATURES.append(feature)
+            continue
+
+        ctype = type(cvalue)
+        if ctype == type(list()):
+            val_list = cvalue
+        else:
+            val_list = [ cvalue ]
+
+        result = False
+        for value in val_list:
+            ctype = type(value)
+            if ctype == type(int()):
+                val = prop_value.as_uint32()
+            else:
+                raise TypeError('Unknown type %s' % ctype)
+
+            if value == val:
+                result = True
+                break
+            else:
+                result = False
+
+        if (cop == '!' and result == False) or \
+           (cop == '=' and result == True):
+            TUNE_FEATURES.append(feature)
+
+    return TUNE_FEATURES
+
+def microblazeVersion(fdt, node):
+    version = None
+
+    val = fdt.getprop( node, 'model', libfdt.QUIET_NOTFOUND)
+
+    if val and val != -1:
+        val = fdt.getprop( node, 'model' ).as_str()
+        version = val[val.find('microblaze,') + 11:]
+
+        if version.startswith('8'):
+            # Strip 8.xx.y, to just 8.xx
+            v = version.split('.')
+            version = '.'.join(v[0:2])
+
+        version = 'v' + version
+
+    return version
+
+def MicroblazeConfig(dtbfile, out):
+    fdt = libfdt.Fdt(open(dtbfile, mode='rb').read())
+
+    cpu = -1
+    while (True):
+        cpu = cpu + 1
+        try:
+            node = fdt.path_offset('/cpus/cpu@%d' % cpu)
+
+            try:
+                prop = fdt.getprop( node, 'compatible' )
+
+                prop_val = prop[:-1].decode('utf-8').split('\x00')
+
+                microblaze = False
+                for val in prop_val:
+                    if "microblaze" in val:
+                        microblaze = True
+                        break
+
+                if not microblaze:
+                    continue
+
+                # Construct TUNE_FEATURE here
+                TUNE_FEATURES = processProperties(fdt, node)
+
+                out.write('AVAILTUNES += "microblaze-cpu%s"\n' % (cpu))
+                out.write('TUNE_FEATURES:tune-microblaze-cpu%s = "%s"\n' % (cpu, ' '.join(TUNE_FEATURES)))
+                out.write('PACKAGE_EXTRA_ARCHS:tune-microblaze-cpu%s = "${TUNE_PKGARCH}"\n' % (cpu))
+
+            except Exception as e:
+                sys.stderr.write("Exception looking at properties: %s\n" % e)
+
+                continue
+
+        except Exception as e:
+            # CPUs SHOULD be consecutive w/o gaps, so no more to search
+            break
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description='Generate MicroBlaze TUNE_FEATURES')
+
+    parser.add_argument('-d', '--dtb-file', action='store',
+        help='DTB file to process')
+
+    parser.add_argument('-o', '--output', action='store',
+        help='Output file to store TUNE_FEATURE settings')
+
+    args = parser.parse_args()
+
+    if not args.dtb_file:
+        sys.stderr.write('ERROR: You must specify a DTB_FILE to process.\n')
+        sys.exit(1)
+
+    outputf = sys.stdout
+    if args.output:
+        if os.path.exists(args.output):
+            sys.stderr.write('ERROR: The output file "%s" exists!\n' % args.output)
+            sys.exit(1)
+        outputf = open(args.output, 'w')
+
+    MicroblazeConfig(args.dtb_file, outputf)