[PATCH v2 4/5] crc: Add a CRC-24Q implementation
Sebastian Huber
sebastian.huber at embedded-brains.de
Thu Jan 25 19:23:00 UTC 2024
---
cpukit/crc/crc24q.c | 148 ++++++++++++++++++
cpukit/include/rtems/crc.h | 106 +++++++++++++
spec/build/cpukit/librtemscpu.yml | 2 +
.../build/testsuites/unit/unit-no-clock-0.yml | 2 +
testsuites/unit/tc-crc.c | 42 +++++
5 files changed, 300 insertions(+)
create mode 100644 cpukit/crc/crc24q.c
create mode 100644 cpukit/include/rtems/crc.h
create mode 100644 testsuites/unit/tc-crc.c
diff --git a/cpukit/crc/crc24q.c b/cpukit/crc/crc24q.c
new file mode 100644
index 0000000000..c96ec88a47
--- /dev/null
+++ b/cpukit/crc/crc24q.c
@@ -0,0 +1,148 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/**
+ * @file
+ *
+ * @ingroup RTEMSImplCRC
+ *
+ * @brief This source file contains the implementation of
+ * _CRC24Q_Update() and _CRC24Q_Sequence_update().
+ *
+ * The CRC-24Q cyclic redundancy checksum is used for example by Qualcomm,
+ * RTCM104v3, and LTE-A.
+ */
+
+/*
+ * Copyright (C) 2023 embedded brains GmbH & Co. KG
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <rtems/crc.h>
+
+static const uint32_t _CRC24Q_Table[256] = {
+ UINT32_C(0x000000), UINT32_C(0x864CFB), UINT32_C(0x8AD50D),
+ UINT32_C(0x0C99F6), UINT32_C(0x93E6E1), UINT32_C(0x15AA1A),
+ UINT32_C(0x1933EC), UINT32_C(0x9F7F17), UINT32_C(0xA18139),
+ UINT32_C(0x27CDC2), UINT32_C(0x2B5434), UINT32_C(0xAD18CF),
+ UINT32_C(0x3267D8), UINT32_C(0xB42B23), UINT32_C(0xB8B2D5),
+ UINT32_C(0x3EFE2E), UINT32_C(0xC54E89), UINT32_C(0x430272),
+ UINT32_C(0x4F9B84), UINT32_C(0xC9D77F), UINT32_C(0x56A868),
+ UINT32_C(0xD0E493), UINT32_C(0xDC7D65), UINT32_C(0x5A319E),
+ UINT32_C(0x64CFB0), UINT32_C(0xE2834B), UINT32_C(0xEE1ABD),
+ UINT32_C(0x685646), UINT32_C(0xF72951), UINT32_C(0x7165AA),
+ UINT32_C(0x7DFC5C), UINT32_C(0xFBB0A7), UINT32_C(0x0CD1E9),
+ UINT32_C(0x8A9D12), UINT32_C(0x8604E4), UINT32_C(0x00481F),
+ UINT32_C(0x9F3708), UINT32_C(0x197BF3), UINT32_C(0x15E205),
+ UINT32_C(0x93AEFE), UINT32_C(0xAD50D0), UINT32_C(0x2B1C2B),
+ UINT32_C(0x2785DD), UINT32_C(0xA1C926), UINT32_C(0x3EB631),
+ UINT32_C(0xB8FACA), UINT32_C(0xB4633C), UINT32_C(0x322FC7),
+ UINT32_C(0xC99F60), UINT32_C(0x4FD39B), UINT32_C(0x434A6D),
+ UINT32_C(0xC50696), UINT32_C(0x5A7981), UINT32_C(0xDC357A),
+ UINT32_C(0xD0AC8C), UINT32_C(0x56E077), UINT32_C(0x681E59),
+ UINT32_C(0xEE52A2), UINT32_C(0xE2CB54), UINT32_C(0x6487AF),
+ UINT32_C(0xFBF8B8), UINT32_C(0x7DB443), UINT32_C(0x712DB5),
+ UINT32_C(0xF7614E), UINT32_C(0x19A3D2), UINT32_C(0x9FEF29),
+ UINT32_C(0x9376DF), UINT32_C(0x153A24), UINT32_C(0x8A4533),
+ UINT32_C(0x0C09C8), UINT32_C(0x00903E), UINT32_C(0x86DCC5),
+ UINT32_C(0xB822EB), UINT32_C(0x3E6E10), UINT32_C(0x32F7E6),
+ UINT32_C(0xB4BB1D), UINT32_C(0x2BC40A), UINT32_C(0xAD88F1),
+ UINT32_C(0xA11107), UINT32_C(0x275DFC), UINT32_C(0xDCED5B),
+ UINT32_C(0x5AA1A0), UINT32_C(0x563856), UINT32_C(0xD074AD),
+ UINT32_C(0x4F0BBA), UINT32_C(0xC94741), UINT32_C(0xC5DEB7),
+ UINT32_C(0x43924C), UINT32_C(0x7D6C62), UINT32_C(0xFB2099),
+ UINT32_C(0xF7B96F), UINT32_C(0x71F594), UINT32_C(0xEE8A83),
+ UINT32_C(0x68C678), UINT32_C(0x645F8E), UINT32_C(0xE21375),
+ UINT32_C(0x15723B), UINT32_C(0x933EC0), UINT32_C(0x9FA736),
+ UINT32_C(0x19EBCD), UINT32_C(0x8694DA), UINT32_C(0x00D821),
+ UINT32_C(0x0C41D7), UINT32_C(0x8A0D2C), UINT32_C(0xB4F302),
+ UINT32_C(0x32BFF9), UINT32_C(0x3E260F), UINT32_C(0xB86AF4),
+ UINT32_C(0x2715E3), UINT32_C(0xA15918), UINT32_C(0xADC0EE),
+ UINT32_C(0x2B8C15), UINT32_C(0xD03CB2), UINT32_C(0x567049),
+ UINT32_C(0x5AE9BF), UINT32_C(0xDCA544), UINT32_C(0x43DA53),
+ UINT32_C(0xC596A8), UINT32_C(0xC90F5E), UINT32_C(0x4F43A5),
+ UINT32_C(0x71BD8B), UINT32_C(0xF7F170), UINT32_C(0xFB6886),
+ UINT32_C(0x7D247D), UINT32_C(0xE25B6A), UINT32_C(0x641791),
+ UINT32_C(0x688E67), UINT32_C(0xEEC29C), UINT32_C(0x3347A4),
+ UINT32_C(0xB50B5F), UINT32_C(0xB992A9), UINT32_C(0x3FDE52),
+ UINT32_C(0xA0A145), UINT32_C(0x26EDBE), UINT32_C(0x2A7448),
+ UINT32_C(0xAC38B3), UINT32_C(0x92C69D), UINT32_C(0x148A66),
+ UINT32_C(0x181390), UINT32_C(0x9E5F6B), UINT32_C(0x01207C),
+ UINT32_C(0x876C87), UINT32_C(0x8BF571), UINT32_C(0x0DB98A),
+ UINT32_C(0xF6092D), UINT32_C(0x7045D6), UINT32_C(0x7CDC20),
+ UINT32_C(0xFA90DB), UINT32_C(0x65EFCC), UINT32_C(0xE3A337),
+ UINT32_C(0xEF3AC1), UINT32_C(0x69763A), UINT32_C(0x578814),
+ UINT32_C(0xD1C4EF), UINT32_C(0xDD5D19), UINT32_C(0x5B11E2),
+ UINT32_C(0xC46EF5), UINT32_C(0x42220E), UINT32_C(0x4EBBF8),
+ UINT32_C(0xC8F703), UINT32_C(0x3F964D), UINT32_C(0xB9DAB6),
+ UINT32_C(0xB54340), UINT32_C(0x330FBB), UINT32_C(0xAC70AC),
+ UINT32_C(0x2A3C57), UINT32_C(0x26A5A1), UINT32_C(0xA0E95A),
+ UINT32_C(0x9E1774), UINT32_C(0x185B8F), UINT32_C(0x14C279),
+ UINT32_C(0x928E82), UINT32_C(0x0DF195), UINT32_C(0x8BBD6E),
+ UINT32_C(0x872498), UINT32_C(0x016863), UINT32_C(0xFAD8C4),
+ UINT32_C(0x7C943F), UINT32_C(0x700DC9), UINT32_C(0xF64132),
+ UINT32_C(0x693E25), UINT32_C(0xEF72DE), UINT32_C(0xE3EB28),
+ UINT32_C(0x65A7D3), UINT32_C(0x5B59FD), UINT32_C(0xDD1506),
+ UINT32_C(0xD18CF0), UINT32_C(0x57C00B), UINT32_C(0xC8BF1C),
+ UINT32_C(0x4EF3E7), UINT32_C(0x426A11), UINT32_C(0xC426EA),
+ UINT32_C(0x2AE476), UINT32_C(0xACA88D), UINT32_C(0xA0317B),
+ UINT32_C(0x267D80), UINT32_C(0xB90297), UINT32_C(0x3F4E6C),
+ UINT32_C(0x33D79A), UINT32_C(0xB59B61), UINT32_C(0x8B654F),
+ UINT32_C(0x0D29B4), UINT32_C(0x01B042), UINT32_C(0x87FCB9),
+ UINT32_C(0x1883AE), UINT32_C(0x9ECF55), UINT32_C(0x9256A3),
+ UINT32_C(0x141A58), UINT32_C(0xEFAAFF), UINT32_C(0x69E604),
+ UINT32_C(0x657FF2), UINT32_C(0xE33309), UINT32_C(0x7C4C1E),
+ UINT32_C(0xFA00E5), UINT32_C(0xF69913), UINT32_C(0x70D5E8),
+ UINT32_C(0x4E2BC6), UINT32_C(0xC8673D), UINT32_C(0xC4FECB),
+ UINT32_C(0x42B230), UINT32_C(0xDDCD27), UINT32_C(0x5B81DC),
+ UINT32_C(0x57182A), UINT32_C(0xD154D1), UINT32_C(0x26359F),
+ UINT32_C(0xA07964), UINT32_C(0xACE092), UINT32_C(0x2AAC69),
+ UINT32_C(0xB5D37E), UINT32_C(0x339F85), UINT32_C(0x3F0673),
+ UINT32_C(0xB94A88), UINT32_C(0x87B4A6), UINT32_C(0x01F85D),
+ UINT32_C(0x0D61AB), UINT32_C(0x8B2D50), UINT32_C(0x145247),
+ UINT32_C(0x921EBC), UINT32_C(0x9E874A), UINT32_C(0x18CBB1),
+ UINT32_C(0xE37B16), UINT32_C(0x6537ED), UINT32_C(0x69AE1B),
+ UINT32_C(0xEFE2E0), UINT32_C(0x709DF7), UINT32_C(0xF6D10C),
+ UINT32_C(0xFA48FA), UINT32_C(0x7C0401), UINT32_C(0x42FA2F),
+ UINT32_C(0xC4B6D4), UINT32_C(0xC82F22), UINT32_C(0x4E63D9),
+ UINT32_C(0xD11CCE), UINT32_C(0x575035), UINT32_C(0x5BC9C3),
+ UINT32_C(0xDD8538)};
+
+static inline uint32_t _CRC24Q_do_update(uint32_t crc, uint8_t byte) {
+ return (crc << 8) ^ _CRC24Q_Table[byte ^ (uint8_t)(crc >> 16)];
+}
+
+uint32_t _CRC24Q_Update(uint32_t crc, uint8_t byte) {
+ return _CRC24Q_do_update(crc, byte);
+}
+
+uint32_t _CRC24Q_Sequence_update(uint32_t crc,
+ const void* bytes,
+ size_t size_in_bytes) {
+ const uint8_t* the_bytes = bytes;
+
+ for (size_t i = 0; i < size_in_bytes; ++i) {
+ crc = _CRC24Q_do_update(crc, the_bytes[i]);
+ }
+
+ return crc;
+}
diff --git a/cpukit/include/rtems/crc.h b/cpukit/include/rtems/crc.h
new file mode 100644
index 0000000000..ffff27af3a
--- /dev/null
+++ b/cpukit/include/rtems/crc.h
@@ -0,0 +1,106 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/**
+ * @file
+ *
+ * @ingroup RTEMSImplCRC
+ *
+ * @brief This header file provides the interfaces of the
+ * @ref RTEMSImplCRC.
+ */
+
+/*
+ * Copyright (C) 2024 embedded brains GmbH & Co. KG
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _RTEMS_CRC_H
+#define _RTEMS_CRC_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/**
+ * @defgroup RTEMSImplCRC Cyclic Redundancy Check (CRC) Support
+ *
+ * @ingroup RTEMSImpl
+ *
+ * @brief This group contains functions to calculate
+ * Cyclic Redundancy Check (CRC) values.
+ *
+ * @{
+ */
+
+
+/**
+ * @brief This constant represents the default CRC-24Q seed state.
+ */
+#define CRC24Q_SEED 0U
+
+/**
+ * @brief This constant provides a mask to get a valid CRC-24Q value from the
+ * integers returned by _CRC24Q_Update() and _CRC24Q_Sequence_update().
+ */
+#define CRC24Q_MASK 0xffffffU
+
+/**
+ * @brief Updates the CRC-24Q state using a byte.
+ *
+ * @param crc is the input CRC-24Q state.
+ *
+ * @param byte is the byte updating the input CRC-24Q state.
+ *
+ * @return Returns the updated CRC-24Q state. Use the #CRC24Q_MASK to get a
+ * valid CRC-24Q value.
+ */
+uint32_t _CRC24Q_Update( uint32_t crc, uint8_t byte );
+
+/**
+ * @brief Updates the CRC-24Q state using a sequence of bytes.
+ *
+ * @param crc is the input CRC-24Q state.
+ *
+ * @param bytes is the sequence of bytes updating the input CRC-24Q state.
+ *
+ * @param size_in_bytes is the size in bytes of the byte sequence.
+ *
+ * @return Returns the updated CRC-24Q state. Use the #CRC24Q_MASK to get a
+ * valid CRC-24Q value.
+ */
+uint32_t _CRC24Q_Sequence_update(
+ uint32_t crc,
+ const void *bytes,
+ size_t size_in_bytes
+);
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* _RTEMS_CRC_H */
diff --git a/spec/build/cpukit/librtemscpu.yml b/spec/build/cpukit/librtemscpu.yml
index 45960099e8..f40dae98db 100644
--- a/spec/build/cpukit/librtemscpu.yml
+++ b/spec/build/cpukit/librtemscpu.yml
@@ -99,6 +99,7 @@ install:
- cpukit/include/rtems/console.h
- cpukit/include/rtems/counter.h
- cpukit/include/rtems/cpuuse.h
+ - cpukit/include/rtems/crc.h
- cpukit/include/rtems/deviceio.h
- cpukit/include/rtems/devnull.h
- cpukit/include/rtems/devzero.h
@@ -528,6 +529,7 @@ source:
- cpukit/compression/xz/xz_crc32.c
- cpukit/compression/xz/xz_dec_lzma2.c
- cpukit/compression/xz/xz_dec_stream.c
+- cpukit/crc/crc24q.c
- cpukit/base64/base64-encode.c
- cpukit/base64/base64-decode.c
- cpukit/dev/flash/flashdev.c
diff --git a/spec/build/testsuites/unit/unit-no-clock-0.yml b/spec/build/testsuites/unit/unit-no-clock-0.yml
index d61c570183..825e7619cd 100644
--- a/spec/build/testsuites/unit/unit-no-clock-0.yml
+++ b/spec/build/testsuites/unit/unit-no-clock-0.yml
@@ -14,6 +14,7 @@ source:
- testsuites/unit/tc-base64-decode.c
- testsuites/unit/tc-compiler-builtins.c
- testsuites/unit/tc-config.c
+- testsuites/unit/tc-crc.c
- testsuites/unit/tc-misaligned-builtin-memcpy.c
- testsuites/unit/tc-score-msgq.c
- testsuites/unit/tc-score-rbtree.c
@@ -23,4 +24,5 @@ target: testsuites/unit/ts-unit-no-clock-0.exe
type: build
use-after:
- validation
+- z
use-before: []
diff --git a/testsuites/unit/tc-crc.c b/testsuites/unit/tc-crc.c
new file mode 100644
index 0000000000..4ab0f4c882
--- /dev/null
+++ b/testsuites/unit/tc-crc.c
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/*
+ * Copyright (C) 2023 embedded brains GmbH & Co. KG
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <rtems/crc.h>
+
+#include <rtems/test.h>
+
+T_TEST_CASE(CRC24Q) {
+ uint32_t state = _CRC24Q_Update(CRC24Q_SEED, 0);
+ T_eq_u32(state, 0);
+ state = _CRC24Q_Update(CRC24Q_SEED, '1');
+ state = _CRC24Q_Update(state, '2');
+ state = _CRC24Q_Update(state, '3');
+ T_eq_u32(state & CRC24Q_MASK, 0x2c3045);
+ uint8_t bytes[] = {'1', '2', '3'};
+ state = _CRC24Q_Sequence_update(CRC24Q_SEED, &bytes[0], sizeof(bytes));
+ T_eq_u32(state & CRC24Q_MASK, 0x2c3045);
+}
--
2.35.3
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