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![Greg Kroah-Hartman](/assets/img/avatar_default.png)
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>
254 lines
8.1 KiB
C
254 lines
8.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* viking.h: Defines specific to the GNU/Viking MBUS module.
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* This is SRMMU stuff.
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*
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* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
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*/
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#ifndef _SPARC_VIKING_H
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#define _SPARC_VIKING_H
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#include <asm/asi.h>
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#include <asm/mxcc.h>
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#include <asm/pgtsrmmu.h>
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/* Bits in the SRMMU control register for GNU/Viking modules.
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*
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* -----------------------------------------------------------
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* |impl-vers| RSV |TC|AC|SP|BM|PC|MBM|SB|IC|DC|PSO|RSV|NF|ME|
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* -----------------------------------------------------------
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* 31 24 23-17 16 15 14 13 12 11 10 9 8 7 6-2 1 0
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*
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* TC: Tablewalk Cacheable -- 0 = Twalks are not cacheable in E-cache
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* 1 = Twalks are cacheable in E-cache
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*
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* GNU/Viking will only cache tablewalks in the E-cache (mxcc) if present
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* and never caches them internally (or so states the docs). Therefore
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* for machines lacking an E-cache (ie. in MBUS mode) this bit must
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* remain cleared.
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*
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* AC: Alternate Cacheable -- 0 = Passthru physical accesses not cacheable
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* 1 = Passthru physical accesses cacheable
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*
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* This indicates whether accesses are cacheable when no cachable bit
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* is present in the pte when the processor is in boot-mode or the
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* access does not need pte's for translation (ie. pass-thru ASI's).
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* "Cachable" is only referring to E-cache (if present) and not the
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* on chip split I/D caches of the GNU/Viking.
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*
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* SP: SnooP Enable -- 0 = bus snooping off, 1 = bus snooping on
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*
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* This enables snooping on the GNU/Viking bus. This must be on
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* for the hardware cache consistency mechanisms of the GNU/Viking
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* to work at all. On non-mxcc GNU/Viking modules the split I/D
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* caches will snoop regardless of whether they are enabled, this
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* takes care of the case where the I or D or both caches are turned
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* off yet still contain valid data. Note also that this bit does
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* not affect GNU/Viking store-buffer snoops, those happen if the
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* store-buffer is enabled no matter what.
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*
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* BM: Boot Mode -- 0 = not in boot mode, 1 = in boot mode
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*
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* This indicates whether the GNU/Viking is in boot-mode or not,
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* if it is then all instruction fetch physical addresses are
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* computed as 0xff0000000 + low 28 bits of requested address.
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* GNU/Viking boot-mode does not affect data accesses. Also,
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* in boot mode instruction accesses bypass the split on chip I/D
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* caches, they may be cached by the GNU/MXCC if present and enabled.
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*
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* MBM: MBus Mode -- 0 = not in MBus mode, 1 = in MBus mode
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*
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* This indicated the GNU/Viking configuration present. If in
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* MBUS mode, the GNU/Viking lacks a GNU/MXCC E-cache. If it is
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* not then the GNU/Viking is on a module VBUS connected directly
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* to a GNU/MXCC cache controller. The GNU/MXCC can be thus connected
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* to either an GNU/MBUS (sun4m) or the packet-switched GNU/XBus (sun4d).
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*
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* SB: StoreBuffer enable -- 0 = store buffer off, 1 = store buffer on
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*
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* The GNU/Viking store buffer allows the chip to continue execution
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* after a store even if the data cannot be placed in one of the
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* caches during that cycle. If disabled, all stores operations
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* occur synchronously.
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*
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* IC: Instruction Cache -- 0 = off, 1 = on
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* DC: Data Cache -- 0 = off, 1 = 0n
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*
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* These bits enable the on-cpu GNU/Viking split I/D caches. Note,
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* as mentioned above, these caches will snoop the bus in GNU/MBUS
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* configurations even when disabled to avoid data corruption.
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*
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* NF: No Fault -- 0 = faults generate traps, 1 = faults don't trap
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* ME: MMU enable -- 0 = mmu not translating, 1 = mmu translating
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*
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*/
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#define VIKING_MMUENABLE 0x00000001
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#define VIKING_NOFAULT 0x00000002
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#define VIKING_PSO 0x00000080
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#define VIKING_DCENABLE 0x00000100 /* Enable data cache */
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#define VIKING_ICENABLE 0x00000200 /* Enable instruction cache */
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#define VIKING_SBENABLE 0x00000400 /* Enable store buffer */
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#define VIKING_MMODE 0x00000800 /* MBUS mode */
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#define VIKING_PCENABLE 0x00001000 /* Enable parity checking */
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#define VIKING_BMODE 0x00002000
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#define VIKING_SPENABLE 0x00004000 /* Enable bus cache snooping */
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#define VIKING_ACENABLE 0x00008000 /* Enable alternate caching */
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#define VIKING_TCENABLE 0x00010000 /* Enable table-walks to be cached */
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#define VIKING_DPENABLE 0x00040000 /* Enable the data prefetcher */
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/*
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* GNU/Viking Breakpoint Action Register fields.
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*/
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#define VIKING_ACTION_MIX 0x00001000 /* Enable multiple instructions */
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/*
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* GNU/Viking Cache Tags.
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*/
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#define VIKING_PTAG_VALID 0x01000000 /* Cache block is valid */
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#define VIKING_PTAG_DIRTY 0x00010000 /* Block has been modified */
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#define VIKING_PTAG_SHARED 0x00000100 /* Shared with some other cache */
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#ifndef __ASSEMBLY__
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static inline void viking_flush_icache(void)
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{
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__asm__ __volatile__("sta %%g0, [%%g0] %0\n\t"
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: /* no outputs */
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: "i" (ASI_M_IC_FLCLEAR)
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: "memory");
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}
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static inline void viking_flush_dcache(void)
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{
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__asm__ __volatile__("sta %%g0, [%%g0] %0\n\t"
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: /* no outputs */
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: "i" (ASI_M_DC_FLCLEAR)
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: "memory");
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}
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static inline void viking_unlock_icache(void)
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{
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__asm__ __volatile__("sta %%g0, [%0] %1\n\t"
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: /* no outputs */
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: "r" (0x80000000), "i" (ASI_M_IC_FLCLEAR)
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: "memory");
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}
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static inline void viking_unlock_dcache(void)
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{
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__asm__ __volatile__("sta %%g0, [%0] %1\n\t"
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: /* no outputs */
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: "r" (0x80000000), "i" (ASI_M_DC_FLCLEAR)
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: "memory");
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}
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static inline void viking_set_bpreg(unsigned long regval)
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{
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__asm__ __volatile__("sta %0, [%%g0] %1\n\t"
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: /* no outputs */
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: "r" (regval), "i" (ASI_M_ACTION)
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: "memory");
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}
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static inline unsigned long viking_get_bpreg(void)
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{
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unsigned long regval;
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__asm__ __volatile__("lda [%%g0] %1, %0\n\t"
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: "=r" (regval)
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: "i" (ASI_M_ACTION));
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return regval;
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}
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static inline void viking_get_dcache_ptag(int set, int block,
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unsigned long *data)
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{
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unsigned long ptag = ((set & 0x7f) << 5) | ((block & 0x3) << 26) |
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0x80000000;
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unsigned long info, page;
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__asm__ __volatile__ ("ldda [%2] %3, %%g2\n\t"
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"or %%g0, %%g2, %0\n\t"
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"or %%g0, %%g3, %1\n\t"
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: "=r" (info), "=r" (page)
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: "r" (ptag), "i" (ASI_M_DATAC_TAG)
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: "g2", "g3");
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data[0] = info;
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data[1] = page;
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}
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static inline void viking_mxcc_turn_off_parity(unsigned long *mregp,
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unsigned long *mxcc_cregp)
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{
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unsigned long mreg = *mregp;
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unsigned long mxcc_creg = *mxcc_cregp;
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mreg &= ~(VIKING_PCENABLE);
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mxcc_creg &= ~(MXCC_CTL_PARE);
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__asm__ __volatile__ ("set 1f, %%g2\n\t"
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"andcc %%g2, 4, %%g0\n\t"
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"bne 2f\n\t"
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" nop\n"
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"1:\n\t"
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"sta %0, [%%g0] %3\n\t"
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"sta %1, [%2] %4\n\t"
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"b 1f\n\t"
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" nop\n\t"
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"nop\n"
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"2:\n\t"
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"sta %0, [%%g0] %3\n\t"
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"sta %1, [%2] %4\n"
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"1:\n\t"
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: /* no output */
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: "r" (mreg), "r" (mxcc_creg),
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"r" (MXCC_CREG), "i" (ASI_M_MMUREGS),
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"i" (ASI_M_MXCC)
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: "g2", "memory", "cc");
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*mregp = mreg;
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*mxcc_cregp = mxcc_creg;
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}
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static inline unsigned long viking_hwprobe(unsigned long vaddr)
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{
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unsigned long val;
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vaddr &= PAGE_MASK;
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/* Probe all MMU entries. */
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__asm__ __volatile__("lda [%1] %2, %0\n\t"
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: "=r" (val)
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: "r" (vaddr | 0x400), "i" (ASI_M_FLUSH_PROBE));
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if (!val)
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return 0;
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/* Probe region. */
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__asm__ __volatile__("lda [%1] %2, %0\n\t"
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: "=r" (val)
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: "r" (vaddr | 0x200), "i" (ASI_M_FLUSH_PROBE));
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if ((val & SRMMU_ET_MASK) == SRMMU_ET_PTE) {
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vaddr &= ~SRMMU_PGDIR_MASK;
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vaddr >>= PAGE_SHIFT;
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return val | (vaddr << 8);
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}
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/* Probe segment. */
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__asm__ __volatile__("lda [%1] %2, %0\n\t"
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: "=r" (val)
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: "r" (vaddr | 0x100), "i" (ASI_M_FLUSH_PROBE));
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if ((val & SRMMU_ET_MASK) == SRMMU_ET_PTE) {
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vaddr &= ~SRMMU_REAL_PMD_MASK;
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vaddr >>= PAGE_SHIFT;
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return val | (vaddr << 8);
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}
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/* Probe page. */
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__asm__ __volatile__("lda [%1] %2, %0\n\t"
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: "=r" (val)
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: "r" (vaddr), "i" (ASI_M_FLUSH_PROBE));
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return val;
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}
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#endif /* !__ASSEMBLY__ */
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#endif /* !(_SPARC_VIKING_H) */
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