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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>
138 lines
4.8 KiB
C
138 lines
4.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Bit definitions for the MCF54xx ACR and CACR registers.
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*/
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#ifndef m54xxacr_h
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#define m54xxacr_h
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/*
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* Define the Cache register flags.
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*/
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#define CACR_DEC 0x80000000 /* Enable data cache */
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#define CACR_DWP 0x40000000 /* Data write protection */
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#define CACR_DESB 0x20000000 /* Enable data store buffer */
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#define CACR_DDPI 0x10000000 /* Disable invalidation by CPUSHL */
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#define CACR_DHCLK 0x08000000 /* Half data cache lock mode */
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#define CACR_DDCM_WT 0x00000000 /* Write through cache*/
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#define CACR_DDCM_CP 0x02000000 /* Copyback cache */
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#define CACR_DDCM_P 0x04000000 /* No cache, precise */
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#define CACR_DDCM_IMP 0x06000000 /* No cache, imprecise */
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#define CACR_DCINVA 0x01000000 /* Invalidate data cache */
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#define CACR_BEC 0x00080000 /* Enable branch cache */
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#define CACR_BCINVA 0x00040000 /* Invalidate branch cache */
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#define CACR_IEC 0x00008000 /* Enable instruction cache */
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#define CACR_DNFB 0x00002000 /* Inhibited fill buffer */
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#define CACR_IDPI 0x00001000 /* Disable CPUSHL */
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#define CACR_IHLCK 0x00000800 /* Instruction cache half lock */
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#define CACR_IDCM 0x00000400 /* Instruction cache inhibit */
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#define CACR_ICINVA 0x00000100 /* Invalidate instr cache */
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#define CACR_EUSP 0x00000020 /* Enable separate user a7 */
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#define ACR_BASE_POS 24 /* Address Base */
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#define ACR_MASK_POS 16 /* Address Mask */
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#define ACR_ENABLE 0x00008000 /* Enable address */
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#define ACR_USER 0x00000000 /* User mode access only */
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#define ACR_SUPER 0x00002000 /* Supervisor mode only */
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#define ACR_ANY 0x00004000 /* Match any access mode */
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#define ACR_CM_WT 0x00000000 /* Write through mode */
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#define ACR_CM_CP 0x00000020 /* Copyback mode */
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#define ACR_CM_OFF_PRE 0x00000040 /* No cache, precise */
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#define ACR_CM_OFF_IMP 0x00000060 /* No cache, imprecise */
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#define ACR_CM 0x00000060 /* Cache mode mask */
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#define ACR_SP 0x00000008 /* Supervisor protect */
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#define ACR_WPROTECT 0x00000004 /* Write protect */
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#define ACR_BA(x) ((x) & 0xff000000)
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#define ACR_ADMSK(x) ((((x) - 1) & 0xff000000) >> 8)
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#if defined(CONFIG_M5407)
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#define ICACHE_SIZE 0x4000 /* instruction - 16k */
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#define DCACHE_SIZE 0x2000 /* data - 8k */
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#elif defined(CONFIG_M54xx)
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#define ICACHE_SIZE 0x8000 /* instruction - 32k */
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#define DCACHE_SIZE 0x8000 /* data - 32k */
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#elif defined(CONFIG_M5441x)
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#define ICACHE_SIZE 0x2000 /* instruction - 8k */
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#define DCACHE_SIZE 0x2000 /* data - 8k */
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#endif
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#define CACHE_LINE_SIZE 0x0010 /* 16 bytes */
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#define CACHE_WAYS 4 /* 4 ways */
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#define ICACHE_SET_MASK ((ICACHE_SIZE / 64 - 1) << CACHE_WAYS)
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#define DCACHE_SET_MASK ((DCACHE_SIZE / 64 - 1) << CACHE_WAYS)
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#define ICACHE_MAX_ADDR ICACHE_SET_MASK
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#define DCACHE_MAX_ADDR DCACHE_SET_MASK
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/*
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* Version 4 cores have a true harvard style separate instruction
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* and data cache. Enable data and instruction caches, also enable write
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* buffers and branch accelerator.
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*/
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/* attention : enabling CACR_DESB requires a "nop" to flush the store buffer */
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/* use '+' instead of '|' for assembler's sake */
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/* Enable data cache */
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/* Enable data store buffer */
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/* outside ACRs : No cache, precise */
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/* Enable instruction+branch caches */
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#if defined(CONFIG_M5407)
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#define CACHE_MODE (CACR_DEC+CACR_DESB+CACR_DDCM_P+CACR_BEC+CACR_IEC)
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#else
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#define CACHE_MODE (CACR_DEC+CACR_DESB+CACR_DDCM_P+CACR_BEC+CACR_IEC+CACR_EUSP)
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#endif
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#define CACHE_INIT (CACR_DCINVA+CACR_BCINVA+CACR_ICINVA)
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#if defined(CONFIG_MMU)
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/*
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* If running with the MMU enabled then we need to map the internal
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* register region as non-cacheable. And then we map all our RAM as
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* cacheable and supervisor access only.
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*/
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#define ACR0_MODE (ACR_BA(IOMEMBASE)+ACR_ADMSK(IOMEMSIZE)+ \
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ACR_ENABLE+ACR_SUPER+ACR_CM_OFF_PRE+ACR_SP)
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#if defined(CONFIG_CACHE_COPYBACK)
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#define ACR1_MODE (ACR_BA(CONFIG_RAMBASE)+ACR_ADMSK(CONFIG_RAMSIZE)+ \
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ACR_ENABLE+ACR_SUPER+ACR_SP+ACR_CM_CP)
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#else
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#define ACR1_MODE (ACR_BA(CONFIG_RAMBASE)+ACR_ADMSK(CONFIG_RAMSIZE)+ \
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ACR_ENABLE+ACR_SUPER+ACR_SP+ACR_CM_WT)
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#endif
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#define ACR2_MODE 0
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#define ACR3_MODE (ACR_BA(CONFIG_RAMBASE)+ACR_ADMSK(CONFIG_RAMSIZE)+ \
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ACR_ENABLE+ACR_SUPER+ACR_SP)
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#else
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/*
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* For the non-MMU enabled case we map all of RAM as cacheable.
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*/
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#if defined(CONFIG_CACHE_COPYBACK)
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#define DATA_CACHE_MODE (ACR_ENABLE+ACR_ANY+ACR_CM_CP)
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#else
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#define DATA_CACHE_MODE (ACR_ENABLE+ACR_ANY+ACR_CM_WT)
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#endif
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#define INSN_CACHE_MODE (ACR_ENABLE+ACR_ANY)
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#define CACHE_INVALIDATE (CACHE_MODE+CACR_DCINVA+CACR_BCINVA+CACR_ICINVA)
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#define CACHE_INVALIDATEI (CACHE_MODE+CACR_BCINVA+CACR_ICINVA)
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#define CACHE_INVALIDATED (CACHE_MODE+CACR_DCINVA)
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#define ACR0_MODE (0x000f0000+DATA_CACHE_MODE)
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#define ACR1_MODE 0
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#define ACR2_MODE (0x000f0000+INSN_CACHE_MODE)
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#define ACR3_MODE 0
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#if ((DATA_CACHE_MODE & ACR_CM) == ACR_CM_CP)
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/* Copyback cache mode must push dirty cache lines first */
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#define CACHE_PUSH
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#endif
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#endif /* CONFIG_MMU */
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#endif /* m54xxacr_h */
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