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linux/arch/m32r/include/asm/assembler.h
Greg Kroah-Hartman b24413180f License cleanup: add SPDX GPL-2.0 license identifier to files with no license 
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>
2017-11-02 11:10:55 +01:00

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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_M32R_ASSEMBLER_H
#define _ASM_M32R_ASSEMBLER_H
/*
* linux/asm-m32r/assembler.h
*
* Copyright (C) 2004 Hirokazu Takata <takata at linux-m32r.org>
*
* This file contains M32R architecture specific macro definitions.
*/
#include <linux/stringify.h>
#undef __STR
#ifdef __ASSEMBLY__
#define __STR(x) x
#else
#define __STR(x) __stringify(x)
#endif
#ifdef CONFIG_SMP
#define M32R_LOCK __STR(lock)
#define M32R_UNLOCK __STR(unlock)
#else
#define M32R_LOCK __STR(ld)
#define M32R_UNLOCK __STR(st)
#endif
#ifdef __ASSEMBLY__
#undef ENTRY
#define ENTRY(name) ENTRY_M name
.macro ENTRY_M name
.global \name
ALIGN
\name:
.endm
#endif
/**
* LDIMM - load immediate value
* STI - enable interruption
* CLI - disable interruption
*/
#ifdef __ASSEMBLY__
#define LDIMM(reg,x) LDIMM reg x
.macro LDIMM reg x
seth \reg, #high(\x)
or3 \reg, \reg, #low(\x)
.endm
#if !(defined(CONFIG_CHIP_M32102) || defined(CONFIG_CHIP_M32104))
#define ENABLE_INTERRUPTS(reg) ENABLE_INTERRUPTS reg
.macro ENABLE_INTERRUPTS reg
setpsw #0x40 -> nop
; WORKAROUND: "-> nop" is a workaround for the M32700(TS1).
.endm
#define DISABLE_INTERRUPTS(reg) DISABLE_INTERRUPTS reg
.macro DISABLE_INTERRUPTS reg
clrpsw #0x40 -> nop
; WORKAROUND: "-> nop" is a workaround for the M32700(TS1).
.endm
#else /* CONFIG_CHIP_M32102 || CONFIG_CHIP_M32104 */
#define ENABLE_INTERRUPTS(reg) ENABLE_INTERRUPTS reg
.macro ENABLE_INTERRUPTS reg
mvfc \reg, psw
or3 \reg, \reg, #0x0040
mvtc \reg, psw
.endm
#define DISABLE_INTERRUPTS(reg) DISABLE_INTERRUPTS reg
.macro DISABLE_INTERRUPTS reg
mvfc \reg, psw
and3 \reg, \reg, #0xffbf
mvtc \reg, psw
.endm
#endif /* CONFIG_CHIP_M32102 */
.macro SAVE_ALL
push r0 ; orig_r0
push sp ; spi (r15)
push lr ; r14
push r13
mvfc r13, cr3 ; spu
push r13
mvfc r13, bbpc
push r13
mvfc r13, bbpsw
push r13
mvfc r13, bpc
push r13
mvfc r13, psw
push r13
#if defined(CONFIG_ISA_M32R2) && defined(CONFIG_ISA_DSP_LEVEL2)
mvfaclo r13, a1
push r13
mvfachi r13, a1
push r13
mvfaclo r13, a0
push r13
mvfachi r13, a0
push r13
#elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R)
mvfaclo r13
push r13
mvfachi r13
push r13
ldi r13, #0
push r13 ; dummy push acc1h
push r13 ; dummy push acc1l
#else
#error unknown isa configuration
#endif
ldi r13, #-1
push r13 ; syscall_nr (default: -1)
push r12
push r11
push r10
push r9
push r8
push r7
push r3
push r2
push r1
push r0
addi sp, #-4 ; room for implicit pt_regs parameter
push r6
push r5
push r4
.endm
.macro RESTORE_ALL
pop r4
pop r5
pop r6
addi sp, #4
pop r0
pop r1
pop r2
pop r3
pop r7
pop r8
pop r9
pop r10
pop r11
pop r12
addi r15, #4 ; Skip syscall number
#if defined(CONFIG_ISA_M32R2) && defined(CONFIG_ISA_DSP_LEVEL2)
pop r13
mvtachi r13, a0
pop r13
mvtaclo r13, a0
pop r13
mvtachi r13, a1
pop r13
mvtaclo r13, a1
#elif defined(CONFIG_ISA_M32R2) || defined(CONFIG_ISA_M32R)
pop r13 ; dummy pop acc1h
pop r13 ; dummy pop acc1l
pop r13
mvtachi r13
pop r13
mvtaclo r13
#else
#error unknown isa configuration
#endif
pop r14
mvtc r14, psw
pop r14
mvtc r14, bpc
addi sp, #8 ; Skip bbpsw, bbpc
pop r14
mvtc r14, cr3 ; spu
pop r13
pop lr ; r14
pop sp ; spi (r15)
addi sp, #4 ; Skip orig_r0
.fillinsn
1: rte
.section .fixup,"ax"
2: bl do_exit
.previous
.section __ex_table,"a"
ALIGN
.long 1b, 2b
.previous
.endm
#define GET_CURRENT(reg) get_current reg
.macro get_current reg
ldi \reg, #-8192
and \reg, sp
.endm
#if !(defined(CONFIG_CHIP_M32102) || defined(CONFIG_CHIP_M32104))
.macro SWITCH_TO_KERNEL_STACK
; switch to kernel stack (spi)
clrpsw #0x80 -> nop
.endm
#else /* CONFIG_CHIP_M32102 || CONFIG_CHIP_M32104 */
.macro SWITCH_TO_KERNEL_STACK
push r0 ; save r0 for working
mvfc r0, psw
and3 r0, r0, #0x00ff7f
mvtc r0, psw
slli r0, #16
bltz r0, 1f ; check BSM-bit
;
;; called from kernel context: previous stack = spi
pop r0 ; retrieve r0
bra 2f
.fillinsn
1:
;; called from user context: previous stack = spu
mvfc r0, cr3 ; spu
addi r0, #4
mvtc r0, cr3 ; spu
ld r0, @(-4,r0) ; retrieve r0
.fillinsn
2:
.endm
#endif /* CONFIG_CHIP_M32102 || CONFIG_CHIP_M32104 */
#endif /* __ASSEMBLY__ */
#endif /* _ASM_M32R_ASSEMBLER_H */
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