From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=192.55.52.120; helo=mga04.intel.com; envelope-from=ray.ni@intel.com; receiver=edk2-devel@lists.01.org Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 3E49E211C573E for ; Thu, 31 Jan 2019 22:37:42 -0800 (PST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 31 Jan 2019 22:37:41 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,547,1539673200"; d="scan'208";a="111553016" Received: from fmsmsx106.amr.corp.intel.com ([10.18.124.204]) by orsmga007.jf.intel.com with ESMTP; 31 Jan 2019 22:37:41 -0800 Received: from fmsmsx113.amr.corp.intel.com (10.18.116.7) by FMSMSX106.amr.corp.intel.com (10.18.124.204) with Microsoft SMTP Server (TLS) id 14.3.408.0; Thu, 31 Jan 2019 22:37:40 -0800 Received: from shsmsx101.ccr.corp.intel.com (10.239.4.153) by FMSMSX113.amr.corp.intel.com (10.18.116.7) with Microsoft SMTP Server (TLS) id 14.3.408.0; Thu, 31 Jan 2019 22:37:39 -0800 Received: from shsmsx104.ccr.corp.intel.com ([169.254.5.102]) by SHSMSX101.ccr.corp.intel.com ([169.254.1.110]) with mapi id 14.03.0415.000; Fri, 1 Feb 2019 14:37:38 +0800 From: "Ni, Ray" To: 'Ming Huang' , "linaro-uefi@lists.linaro.org" , "edk2-devel@lists.01.org" , "Kinney, Michael D" , "Gao, Liming" CC: "huangming23@huawei.com" , "Dong, Eric" , "zhangjinsong2@huawei.com" , "Zeng, Star" , "waip23@126.com" , "wanghuiqiang@huawei.com" , "huangdaode@hisilicon.com" Thread-Topic: [edk2] [MdePkg/BaseLib v1 1/1] MdePkg BaseLib: Add new API CalculateCrc16() Thread-Index: AQHUufPCKi6Oxr27FE+fgCwxYbS0kqXKfX1w Date: Fri, 1 Feb 2019 06:37:36 +0000 Message-ID: <734D49CCEBEEF84792F5B80ED585239D5C0044AE@SHSMSX104.ccr.corp.intel.com> References: <20190201060152.55724-1-ming.huang@linaro.org> <20190201060152.55724-2-ming.huang@linaro.org> In-Reply-To: <20190201060152.55724-2-ming.huang@linaro.org> Accept-Language: en-US, zh-CN X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.239.127.40] MIME-Version: 1.0 Subject: Re: [MdePkg/BaseLib v1 1/1] MdePkg BaseLib: Add new API CalculateCrc16() X-BeenThere: edk2-devel@lists.01.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: EDK II Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 01 Feb 2019 06:37:42 -0000 Content-Language: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable There is an CRC16 calculation implementation in SourceLevelDebugPkg/Library/DebugAgent/DebugAgentCommon/DebugAgent.c Does your implementation generate the same CRC16 as above one? > -----Original Message----- > From: edk2-devel On Behalf Of Ming > Huang > Sent: Friday, February 1, 2019 2:02 PM > To: linaro-uefi@lists.linaro.org; edk2-devel@lists.01.org; Kinney, Michae= l D > ; Gao, Liming > Cc: huangming23@huawei.com; Dong, Eric ; > zhangjinsong2@huawei.com; Zeng, Star ; > waip23@126.com; wanghuiqiang@huawei.com; huangdaode@hisilicon.com > Subject: [edk2] [MdePkg/BaseLib v1 1/1] MdePkg BaseLib: Add new API > CalculateCrc16() >=20 > CalculateCrc16() bases on the initialized mCrcTable. When CalculateCrc16(= ) is > used, mCrcTable16 will take 512Bytes size in the image. When > CalculateCrc16() is not used, mCrcTable16 will not be built in the image,= and > no size impact. >=20 > Contributed-under: TianoCore Contribution Agreement 1.1 > Signed-off-by: Ming Huang > --- > MdePkg/Include/Library/BaseLib.h | 20 ++++++ > MdePkg/Library/BaseLib/CheckSum.c | 73 ++++++++++++++++++++ > 2 files changed, 93 insertions(+) >=20 > diff --git a/MdePkg/Include/Library/BaseLib.h > b/MdePkg/Include/Library/BaseLib.h > index 1eb842384ee2..956b971e5c69 100644 > --- a/MdePkg/Include/Library/BaseLib.h > +++ b/MdePkg/Include/Library/BaseLib.h > @@ -4855,6 +4855,26 @@ CalculateCrc32( > IN UINTN Length > ); >=20 > +/** > + Computes and returns a 16-bit CRC for a data buffer. > + CRC16 value bases on CCITT. > + > + If Buffer is NULL, then ASSERT(). > + If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). > + > + @param[in] Buffer A pointer to the buffer on which the 16-bit C= RC is to > be computed. > + @param[in] Length The number of bytes in the buffer Data. > + > + @retval Crc16 The 16-bit CRC was computed for the data buff= er. > + > +**/ > +UINT16 > +EFIAPI > +CalculateCrc16( > + IN VOID *Buffer, > + IN UINTN Length > + ); > + > // > // Base Library CPU Functions > // > diff --git a/MdePkg/Library/BaseLib/CheckSum.c > b/MdePkg/Library/BaseLib/CheckSum.c > index 03d49afc5e6c..4e27aebe44bc 100644 > --- a/MdePkg/Library/BaseLib/CheckSum.c > +++ b/MdePkg/Library/BaseLib/CheckSum.c > @@ -630,3 +630,76 @@ CalculateCrc32( >=20 > return Crc ^ 0xffffffff; > } > + > +GLOBAL_REMOVE_IF_UNREFERENCED CONST UINT16 mCrcTable16[256] =3D > { > + 0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7, > + 0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF, > + 0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6, > + 0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE, > + 0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485, > + 0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D, > + 0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4, > + 0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC, > + 0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823, > + 0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B, > + 0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12, > + 0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A, > + 0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41, > + 0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49, > + 0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70, > + 0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78, > + 0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F, > + 0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067, > + 0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E, > + 0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256, > + 0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D, > + 0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405, > + 0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C, > + 0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634, > + 0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB, > + 0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3, > + 0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A, > + 0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92, > + 0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9, > + 0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1, > + 0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8, > + 0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0 }; > + > +/** > + Computes and returns a 16-bit CRC for a data buffer. > + CRC16 value bases on CCITT. > + > + If Buffer is NULL, then ASSERT(). > + If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). > + > + @param[in] Buffer A pointer to the buffer on which the 16-bit C= RC is to > be computed. > + @param[in] Length The number of bytes in the buffer Data. > + > + @retval Crc16 The 16-bit CRC was computed for the data buff= er. > + > +**/ > +UINT16 > +EFIAPI > +CalculateCrc16( > + IN VOID *Buffer, > + IN UINTN Length > + ) > +{ > + UINT16 Crc; > + UINT8 *Ptr; > + > + ASSERT (Buffer !=3D NULL); > + ASSERT (Length <=3D (MAX_ADDRESS - ((UINTN) Buffer) + 1)); > + > + Crc =3D 0; > + Ptr =3D (UINT8 *)Buffer; > + while (Length) { > + Crc =3D mCrcTable16[((UINT8)((Crc >> 8) & 0xff)) ^ *(Ptr++)] ^ > + ((UINT16)(Crc << 8)); > + Length--; > + } > + > + return Crc; > +} > + > -- > 2.9.5 >=20 > _______________________________________________ > edk2-devel mailing list > edk2-devel@lists.01.org > https://lists.01.org/mailman/listinfo/edk2-devel