[topgen/tlgen] Multi-tiered Xbar
The script is to support multi-tiered crossbars on top_earlgrey.
Now any crossbar can have connections to other crossbars. It is allowed
only one connection between two crossbars at this time.
If `xbar: "true"` is defined in the node, the tool does below:
- Recognize it as a crossbar connection
- Gather downstream addresses and calculate the common address range (*)
- If device is a port to another crossbar, the address steering compares
list of address range not a single `address_from`, `address_to`
Signed-off-by: Eunchan Kim <eunchan@opentitan.org>
diff --git a/util/topgen.py b/util/topgen.py
index 8e2dfd0..41507d2 100755
--- a/util/topgen.py
+++ b/util/topgen.py
@@ -42,12 +42,12 @@
def generate_xbars(top, out_path):
- xbar_path = out_path / 'ip/xbar/data/autogen'
- xbar_path.mkdir(parents=True, exist_ok=True)
gencmd = ("// util/topgen.py -t hw/top_earlgrey/data/top_earlgrey.hjson "
"-o hw/top_earlgrey/\n\n")
for obj in top["xbar"]:
+ xbar_path = out_path / 'ip/xbar_{}/data/autogen'.format(obj["name"])
+ xbar_path.mkdir(parents=True, exist_ok=True)
xbar = tlgen.validate(obj)
# Generate output of crossbar with complete fields
@@ -59,13 +59,13 @@
log.error("Elaboration failed." + repr(xbar))
try:
- out_rtl, out_pkg, out_bind = tlgen.generate(xbar)
+ out_rtl, out_pkg, out_core = tlgen.generate(xbar)
except:
log.error(exceptions.text_error_template().render())
- rtl_path = out_path / 'ip/xbar/rtl/autogen'
+ rtl_path = out_path / 'ip/xbar_{}/rtl/autogen'.format(obj["name"])
rtl_path.mkdir(parents=True, exist_ok=True)
- dv_path = out_path / 'ip/xbar/dv/autogen'
+ dv_path = out_path / 'ip/xbar_{}/dv/autogen'.format(obj["name"])
dv_path.mkdir(parents=True, exist_ok=True)
rtl_filename = "xbar_%s.sv" % (xbar.name)
@@ -78,19 +78,20 @@
with pkg_filepath.open(mode='w', encoding='UTF-8') as fout:
fout.write(out_pkg)
- bind_filename = "xbar_%s_bind.sv" % (xbar.name)
- bind_filepath = dv_path / bind_filename
- with bind_filepath.open(mode='w', encoding='UTF-8') as fout:
- fout.write(out_bind)
+ core_filename = "xbar_%s.core" % (xbar.name)
+ core_filepath = rtl_path / core_filename
+ with core_filepath.open(mode='w', encoding='UTF-8') as fout:
+ fout.write(out_core)
+
def generate_alert_handler(top, out_path):
# default values
- esc_cnt_dw=32
- accu_cnt_dw=16
- lfsr_seed=2**31-1
- async_on="'0"
+ esc_cnt_dw = 32
+ accu_cnt_dw = 16
+ lfsr_seed = 2**31 - 1
+ async_on = "'0"
# leave this constant
- n_classes=4
+ n_classes = 4
# check if there are any params to be passed through reggen and placed into
# the generated package
@@ -118,7 +119,7 @@
# set number of alerts to 1 such that the config is still valid
# that input will be tied off
n_alerts = 1
- log.warning("no alerts are defined in the system");
+ log.warning("no alerts are defined in the system")
else:
async_on = ""
for alert in top['alert']:
@@ -132,7 +133,6 @@
log.info("LfsrSeed = %d" % lfsr_seed)
log.info("AsyncOn = %s" % async_on)
-
# Define target path
rtl_path = out_path / 'ip/alert_handler/rtl/autogen'
rtl_path.mkdir(parents=True, exist_ok=True)
@@ -179,8 +179,6 @@
gen_rtl.gen_rtl(hjson_obj, str(rtl_path))
-
-
def generate_plic(top, out_path):
# Count number of interrupts
src = sum([x["width"] if "width" in x else 1 for x in top["interrupt"]])
@@ -439,7 +437,8 @@
"'no' series options cannot be used with 'only' series options")
raise SystemExit(sys.exc_info()[1])
- if not (args.hjson_only or args.plic_only or args.alert_handler_only or args.tpl):
+ if not (args.hjson_only or args.plic_only or args.alert_handler_only or
+ args.tpl):
log.error(
"Template file can be omitted only if '--hjson-only' is true")
raise SystemExit(sys.exc_info()[1])
