b24413180f
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
96 lines
3.6 KiB
C
96 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/****************************************************************************/
|
|
|
|
/*
|
|
* m52xxacr.h -- ColdFire version 2 core cache support
|
|
*
|
|
* (C) Copyright 2010, Greg Ungerer <gerg@snapgear.com>
|
|
*/
|
|
|
|
/****************************************************************************/
|
|
#ifndef m52xxacr_h
|
|
#define m52xxacr_h
|
|
/****************************************************************************/
|
|
|
|
/*
|
|
* All varients of the ColdFire using version 2 cores have a similar
|
|
* cache setup. Although not absolutely identical the cache register
|
|
* definitions are compatible for all of them. Mostly they support a
|
|
* configurable cache memory that can be instruction only, data only,
|
|
* or split instruction and data. The exception is the very old version 2
|
|
* core based parts, like the 5206(e), 5249 and 5272, which are instruction
|
|
* cache only. Cache size varies from 2k up to 16k.
|
|
*/
|
|
|
|
/*
|
|
* Define the Cache Control register flags.
|
|
*/
|
|
#define CACR_CENB 0x80000000 /* Enable cache */
|
|
#define CACR_CDPI 0x10000000 /* Disable invalidation by CPUSHL */
|
|
#define CACR_CFRZ 0x08000000 /* Cache freeze mode */
|
|
#define CACR_CINV 0x01000000 /* Invalidate cache */
|
|
#define CACR_DISI 0x00800000 /* Disable instruction cache */
|
|
#define CACR_DISD 0x00400000 /* Disable data cache */
|
|
#define CACR_INVI 0x00200000 /* Invalidate instruction cache */
|
|
#define CACR_INVD 0x00100000 /* Invalidate data cache */
|
|
#define CACR_CEIB 0x00000400 /* Non-cachable instruction burst */
|
|
#define CACR_DCM 0x00000200 /* Default cache mode */
|
|
#define CACR_DBWE 0x00000100 /* Buffered write enable */
|
|
#define CACR_DWP 0x00000020 /* Write protection */
|
|
#define CACR_EUSP 0x00000010 /* Enable separate user a7 */
|
|
|
|
/*
|
|
* Define the Access Control register flags.
|
|
*/
|
|
#define ACR_BASE_POS 24 /* Address Base (upper 8 bits) */
|
|
#define ACR_MASK_POS 16 /* Address Mask (next 8 bits) */
|
|
#define ACR_ENABLE 0x00008000 /* Enable this ACR */
|
|
#define ACR_USER 0x00000000 /* Allow only user accesses */
|
|
#define ACR_SUPER 0x00002000 /* Allow supervisor access only */
|
|
#define ACR_ANY 0x00004000 /* Allow any access type */
|
|
#define ACR_CENB 0x00000000 /* Caching of region enabled */
|
|
#define ACR_CDIS 0x00000040 /* Caching of region disabled */
|
|
#define ACR_BWE 0x00000020 /* Write buffer enabled */
|
|
#define ACR_WPROTECT 0x00000004 /* Write protect region */
|
|
|
|
/*
|
|
* Set the cache controller settings we will use. On the cores that support
|
|
* a split cache configuration we allow all the combinations at Kconfig
|
|
* time. For those cores that only have an instruction cache we just set
|
|
* that as on.
|
|
*/
|
|
#if defined(CONFIG_CACHE_I)
|
|
#define CACHE_TYPE (CACR_DISD + CACR_EUSP)
|
|
#define CACHE_INVTYPEI 0
|
|
#elif defined(CONFIG_CACHE_D)
|
|
#define CACHE_TYPE (CACR_DISI + CACR_EUSP)
|
|
#define CACHE_INVTYPED 0
|
|
#elif defined(CONFIG_CACHE_BOTH)
|
|
#define CACHE_TYPE CACR_EUSP
|
|
#define CACHE_INVTYPEI CACR_INVI
|
|
#define CACHE_INVTYPED CACR_INVD
|
|
#else
|
|
/* This is the instruction cache only devices (no split cache, no eusp) */
|
|
#define CACHE_TYPE 0
|
|
#define CACHE_INVTYPEI 0
|
|
#endif
|
|
|
|
#define CACHE_INIT (CACR_CINV + CACHE_TYPE)
|
|
#define CACHE_MODE (CACR_CENB + CACHE_TYPE + CACR_DCM)
|
|
|
|
#define CACHE_INVALIDATE (CACHE_MODE + CACR_CINV)
|
|
#if defined(CACHE_INVTYPEI)
|
|
#define CACHE_INVALIDATEI (CACHE_MODE + CACR_CINV + CACHE_INVTYPEI)
|
|
#endif
|
|
#if defined(CACHE_INVTYPED)
|
|
#define CACHE_INVALIDATED (CACHE_MODE + CACR_CINV + CACHE_INVTYPED)
|
|
#endif
|
|
|
|
#define ACR0_MODE ((CONFIG_RAMBASE & 0xff000000) + \
|
|
(0x000f0000) + \
|
|
(ACR_ENABLE + ACR_ANY + ACR_CENB + ACR_BWE))
|
|
#define ACR1_MODE 0
|
|
|
|
/****************************************************************************/
|
|
#endif /* m52xxsim_h */
|