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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>
80 lines
2.7 KiB
C
80 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Common defines for v7m cpus
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*/
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#define V7M_SCS_ICTR IOMEM(0xe000e004)
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#define V7M_SCS_ICTR_INTLINESNUM_MASK 0x0000000f
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#define BASEADDR_V7M_SCB IOMEM(0xe000ed00)
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#define V7M_SCB_CPUID 0x00
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#define V7M_SCB_ICSR 0x04
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#define V7M_SCB_ICSR_PENDSVSET (1 << 28)
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#define V7M_SCB_ICSR_PENDSVCLR (1 << 27)
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#define V7M_SCB_ICSR_RETTOBASE (1 << 11)
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#define V7M_SCB_VTOR 0x08
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#define V7M_SCB_AIRCR 0x0c
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#define V7M_SCB_AIRCR_VECTKEY (0x05fa << 16)
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#define V7M_SCB_AIRCR_SYSRESETREQ (1 << 2)
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#define V7M_SCB_SCR 0x10
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#define V7M_SCB_SCR_SLEEPDEEP (1 << 2)
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#define V7M_SCB_CCR 0x14
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#define V7M_SCB_CCR_STKALIGN (1 << 9)
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#define V7M_SCB_CCR_DC (1 << 16)
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#define V7M_SCB_CCR_IC (1 << 17)
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#define V7M_SCB_CCR_BP (1 << 18)
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#define V7M_SCB_SHPR2 0x1c
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#define V7M_SCB_SHPR3 0x20
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#define V7M_SCB_SHCSR 0x24
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#define V7M_SCB_SHCSR_USGFAULTENA (1 << 18)
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#define V7M_SCB_SHCSR_BUSFAULTENA (1 << 17)
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#define V7M_SCB_SHCSR_MEMFAULTENA (1 << 16)
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#define V7M_xPSR_FRAMEPTRALIGN 0x00000200
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#define V7M_xPSR_EXCEPTIONNO 0x000001ff
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/*
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* When branching to an address that has bits [31:28] == 0xf an exception return
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* occurs. Bits [27:5] are reserved (SBOP). If the processor implements the FP
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* extension Bit [4] defines if the exception frame has space allocated for FP
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* state information, SBOP otherwise. Bit [3] defines the mode that is returned
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* to (0 -> handler mode; 1 -> thread mode). Bit [2] defines which sp is used
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* (0 -> msp; 1 -> psp). Bits [1:0] are fixed to 0b01.
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*/
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#define EXC_RET_STACK_MASK 0x00000004
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#define EXC_RET_THREADMODE_PROCESSSTACK 0xfffffffd
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/* Cache related definitions */
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#define V7M_SCB_CLIDR 0x78 /* Cache Level ID register */
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#define V7M_SCB_CTR 0x7c /* Cache Type register */
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#define V7M_SCB_CCSIDR 0x80 /* Cache size ID register */
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#define V7M_SCB_CSSELR 0x84 /* Cache size selection register */
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/* Cache opeartions */
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#define V7M_SCB_ICIALLU 0x250 /* I-cache invalidate all to PoU */
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#define V7M_SCB_ICIMVAU 0x258 /* I-cache invalidate by MVA to PoU */
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#define V7M_SCB_DCIMVAC 0x25c /* D-cache invalidate by MVA to PoC */
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#define V7M_SCB_DCISW 0x260 /* D-cache invalidate by set-way */
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#define V7M_SCB_DCCMVAU 0x264 /* D-cache clean by MVA to PoU */
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#define V7M_SCB_DCCMVAC 0x268 /* D-cache clean by MVA to PoC */
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#define V7M_SCB_DCCSW 0x26c /* D-cache clean by set-way */
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#define V7M_SCB_DCCIMVAC 0x270 /* D-cache clean and invalidate by MVA to PoC */
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#define V7M_SCB_DCCISW 0x274 /* D-cache clean and invalidate by set-way */
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#define V7M_SCB_BPIALL 0x278 /* D-cache clean and invalidate by set-way */
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#ifndef __ASSEMBLY__
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enum reboot_mode;
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void armv7m_restart(enum reboot_mode mode, const char *cmd);
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#endif /* __ASSEMBLY__ */
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