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Template: Fix arm_vsi3.py to always return SDS I/O status (SDSIO_EOS/SDSIO_ERROR) as 32-bit values #204

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Merged
MiloradCvjetkovic merged 1 commit into from
Mar 6, 2026
Merged

Template: Fix arm_vsi3.py to always return SDS I/O status (SDSIO_EOS/SDSIO_ERROR) as 32-bit values #204

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11 changes: 7 additions & 4 deletions template/Board/Corstone-300/vsi/python/arm_vsi3.py
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
# Copyright (c) 2025 Arm Limited. All rights reserved.
# Copyright (c) 2025-2026 Arm Limited. All rights reserved.
#
# SPDX-License-Identifier: Apache-2.0
#
Expand Down Expand Up @@ -88,6 +88,10 @@ def app(self, message, *args, **kwargs):
# 'No limit' for idx-end
NO_LIMIT = 0x7FFFFFFF

# SDS I/O error/status codes (32-bit two's‑complement, used in the ARGUMENT register)
SDSIO_ERROR = (-1 & 0xFFFFFFFF) # -1
SDSIO_EOS = (-6 & 0xFFFFFFFF) # -6

class IndexAllocator:
"""
Hands out the next SDS index.
Expand Down Expand Up @@ -415,12 +419,12 @@ def processCOMMAND(command):

elif command == 3: # Write
# Return data length or SDSIO_ERROR
ARGUMENT = len(Data) if Stream.write(STREAM_ID, Data) else -1
ARGUMENT = len(Data) if Stream.write(STREAM_ID, Data) else SDSIO_ERROR

elif command == 4: # Read
# Return data length or SDSIO_EOS
Data, eof = Stream.read(STREAM_ID, ARGUMENT)
ARGUMENT = len(Data) if not eof else -6
ARGUMENT = len(Data) if not eof else SDSIO_EOS

return command

Expand Down Expand Up @@ -570,4 +574,3 @@ def wrRegs(index, value):


## @}

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