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13 Commits

Author SHA1 Message Date
Arnd Bergmann
a579fcfa8e c6x: remove architecture 
The c6x architecture was added to the kernel in 2011 at a time when
running Linux on DSPs was widely seen as the logical evolution.
It appears the trend has gone back to running Linux on Arm based SoCs
with DSP, using a better supported software ecosystem, and having better
real-time behavior for the DSP code. An example of this is TI's own
Keystone2 platform.

The upstream kernel port appears to no longer have any users. Mark
Salter remained avaialable to review patches, but mentioned that
he no longer has access to working hardware himself. Without any
users, it's best to just remove the code completely to reduce the
work for cross-architecture code changes.

Many thanks to Mark for maintaining the code for the past ten years.

Link: https://lore.kernel.org/lkml/41dc7795afda9f776d8cd0d3075f776cf586e97c.camel@redhat.com/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
 2021-01-20 09:30:45 +01:00
Mike Rapoport
d724444ab9 asm-generic/page.h: fix typo in #error text requiring a real asm/page.h 
Replace "need to prove a real asm/page.h" with "need to provide a real
asm/page.h"

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
 2019-02-22 21:53:25 +01:00
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
Chen Gang
4e0b6ca9da asm-generic: page.h: Remove useless get_user_page and free_user_page 
They are not symmetric with each other, neither are used in real world
(can not be found by grep command in source code root directory), so
remove them.

Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
 2016-02-26 15:24:55 +01:00
Linus Torvalds
06792c4dde The following changes since commit 3ee72ca992 
are available in the git repository:
 
     git://linux-c6x.org/git/projects/linux-c6x-upstreaming.git for-linux-next
 
  Documentation/devicetree/bindings/c6x/clocks.txt   |   40 +
  Documentation/devicetree/bindings/c6x/dscr.txt     |  127 +++
  Documentation/devicetree/bindings/c6x/emifa.txt    |   62 ++
  .../devicetree/bindings/c6x/interrupt.txt          |  104 +++
  Documentation/devicetree/bindings/c6x/soc.txt      |   28 +
  Documentation/devicetree/bindings/c6x/timer64.txt  |   26 +
  MAINTAINERS                                        |    8 +
  arch/c6x/Kconfig                                   |  174 +++++
  arch/c6x/Makefile                                  |   60 ++
  arch/c6x/boot/Makefile                             |   30 +
  arch/c6x/boot/dts/dsk6455.dts                      |   62 ++
  arch/c6x/boot/dts/evmc6457.dts                     |   48 ++
  arch/c6x/boot/dts/evmc6472.dts                     |   73 ++
  arch/c6x/boot/dts/evmc6474.dts                     |   58 ++
  arch/c6x/boot/dts/tms320c6455.dtsi                 |   96 +++
  arch/c6x/boot/dts/tms320c6457.dtsi                 |   68 ++
  arch/c6x/boot/dts/tms320c6472.dtsi                 |  134 ++++
  arch/c6x/boot/dts/tms320c6474.dtsi                 |   89 +++
  arch/c6x/boot/linked_dtb.S                         |    2 +
  arch/c6x/configs/dsk6455_defconfig                 |   44 ++
  arch/c6x/configs/evmc6457_defconfig                |   41 +
  arch/c6x/configs/evmc6472_defconfig                |   42 +
  arch/c6x/configs/evmc6474_defconfig                |   42 +
  arch/c6x/include/asm/Kbuild                        |   54 ++
  arch/c6x/include/asm/asm-offsets.h                 |    1 +
  arch/c6x/include/asm/bitops.h                      |  105 +++
  arch/c6x/include/asm/byteorder.h                   |   12 +
  arch/c6x/include/asm/cache.h                       |   90 +++
  arch/c6x/include/asm/cacheflush.h                  |   65 ++
  arch/c6x/include/asm/checksum.h                    |   34 +
  arch/c6x/include/asm/clkdev.h                      |   22 +
  arch/c6x/include/asm/clock.h                       |  148 ++++
  arch/c6x/include/asm/delay.h                       |   67 ++
  arch/c6x/include/asm/dma-mapping.h                 |   91 +++
  arch/c6x/include/asm/dscr.h                        |   34 +
  arch/c6x/include/asm/elf.h                         |  113 +++
  arch/c6x/include/asm/ftrace.h                      |    6 +
  arch/c6x/include/asm/hardirq.h                     |   20 +
  arch/c6x/include/asm/irq.h                         |  302 ++++++++
  arch/c6x/include/asm/irqflags.h                    |   72 ++
  arch/c6x/include/asm/linkage.h                     |   30 +
  arch/c6x/include/asm/megamod-pic.h                 |    9 +
  arch/c6x/include/asm/mmu.h                         |   18 +
  arch/c6x/include/asm/module.h                      |   33 +
  arch/c6x/include/asm/mutex.h                       |    6 +
  arch/c6x/include/asm/page.h                        |   11 +
  arch/c6x/include/asm/pgtable.h                     |   81 ++
  arch/c6x/include/asm/processor.h                   |  132 ++++
  arch/c6x/include/asm/procinfo.h                    |   28 +
  arch/c6x/include/asm/prom.h                        |    1 +
  arch/c6x/include/asm/ptrace.h                      |  174 +++++
  arch/c6x/include/asm/sections.h                    |   12 +
  arch/c6x/include/asm/setup.h                       |   32 +
  arch/c6x/include/asm/sigcontext.h                  |   80 ++
  arch/c6x/include/asm/signal.h                      |   17 +
  arch/c6x/include/asm/soc.h                         |   35 +
  arch/c6x/include/asm/string.h                      |   21 +
  arch/c6x/include/asm/swab.h                        |   54 ++
  arch/c6x/include/asm/syscall.h                     |  123 +++
  arch/c6x/include/asm/syscalls.h                    |   55 ++
  arch/c6x/include/asm/system.h                      |  168 ++++
  arch/c6x/include/asm/thread_info.h                 |  121 +++
  arch/c6x/include/asm/timer64.h                     |    6 +
  arch/c6x/include/asm/timex.h                       |   33 +
  arch/c6x/include/asm/tlb.h                         |    8 +
  arch/c6x/include/asm/traps.h                       |   36 +
  arch/c6x/include/asm/uaccess.h                     |  107 +++
  arch/c6x/include/asm/unaligned.h                   |  170 +++++
  arch/c6x/include/asm/unistd.h                      |   26 +
  arch/c6x/kernel/Makefile                           |   12 +
  arch/c6x/kernel/asm-offsets.c                      |  123 +++
  arch/c6x/kernel/c6x_ksyms.c                        |   66 ++
  arch/c6x/kernel/devicetree.c                       |   53 ++
  arch/c6x/kernel/dma.c                              |  153 ++++
  arch/c6x/kernel/entry.S                            |  803 ++++++++++++++++++++
  arch/c6x/kernel/head.S                             |   84 ++
  arch/c6x/kernel/irq.c                              |  728 ++++++++++++++++++
  arch/c6x/kernel/module.c                           |  123 +++
  arch/c6x/kernel/process.c                          |  265 +++++++
  arch/c6x/kernel/ptrace.c                           |  187 +++++
  arch/c6x/kernel/setup.c                            |  510 +++++++++++++
  arch/c6x/kernel/signal.c                           |  377 +++++++++
  arch/c6x/kernel/soc.c                              |   91 +++
  arch/c6x/kernel/switch_to.S                        |   74 ++
  arch/c6x/kernel/sys_c6x.c                          |   74 ++
  arch/c6x/kernel/time.c                             |   65 ++
  arch/c6x/kernel/traps.c                            |  423 ++++++++++
  arch/c6x/kernel/vectors.S                          |   81 ++
  arch/c6x/kernel/vmlinux.lds.S                      |  162 ++++
  arch/c6x/lib/Makefile                              |    7 +
  arch/c6x/lib/checksum.c                            |   36 +
  arch/c6x/lib/csum_64plus.S                         |  419 ++++++++++
  arch/c6x/lib/divi.S                                |   53 ++
  arch/c6x/lib/divremi.S                             |   46 ++
  arch/c6x/lib/divremu.S                             |   87 +++
  arch/c6x/lib/divu.S                                |   98 +++
  arch/c6x/lib/llshl.S                               |   37 +
  arch/c6x/lib/llshr.S                               |   38 +
  arch/c6x/lib/llshru.S                              |   38 +
  arch/c6x/lib/memcpy_64plus.S                       |   46 ++
  arch/c6x/lib/mpyll.S                               |   49 ++
  arch/c6x/lib/negll.S                               |   31 +
  arch/c6x/lib/pop_rts.S                             |   32 +
  arch/c6x/lib/push_rts.S                            |   31 +
  arch/c6x/lib/remi.S                                |   64 ++
  arch/c6x/lib/remu.S                                |   82 ++
  arch/c6x/lib/strasgi.S                             |   89 +++
  arch/c6x/lib/strasgi_64plus.S                      |   39 +
  arch/c6x/mm/Makefile                               |    5 +
  arch/c6x/mm/dma-coherent.c                         |  143 ++++
  arch/c6x/mm/init.c                                 |  113 +++
  arch/c6x/platforms/Kconfig                         |   16 +
  arch/c6x/platforms/Makefile                        |   12 +
  arch/c6x/platforms/cache.c                         |  445 +++++++++++
  arch/c6x/platforms/dscr.c                          |  598 +++++++++++++++
  arch/c6x/platforms/emif.c                          |   87 +++
  arch/c6x/platforms/megamod-pic.c                   |  349 +++++++++
  arch/c6x/platforms/platform.c                      |   17 +
  arch/c6x/platforms/pll.c                           |  444 +++++++++++
  arch/c6x/platforms/plldata.c                       |  404 ++++++++++
  arch/c6x/platforms/timer64.c                       |  244 ++++++
  include/asm-generic/io.h                           |    2 +-
  include/asm-generic/page.h                         |   10 +-
  include/asm-generic/uaccess.h                      |    7 +-
  include/linux/elf-em.h                             |    1 +
  125 files changed, 12989 insertions(+), 5 deletions(-)
  create mode 100644 Documentation/devicetree/bindings/c6x/clocks.txt
  create mode 100644 Documentation/devicetree/bindings/c6x/dscr.txt
  create mode 100644 Documentation/devicetree/bindings/c6x/emifa.txt
  create mode 100644 Documentation/devicetree/bindings/c6x/interrupt.txt
  create mode 100644 Documentation/devicetree/bindings/c6x/soc.txt
  create mode 100644 Documentation/devicetree/bindings/c6x/timer64.txt
  create mode 100644 arch/c6x/Kconfig
  create mode 100644 arch/c6x/Makefile
  create mode 100644 arch/c6x/boot/Makefile
  create mode 100644 arch/c6x/boot/dts/dsk6455.dts
  create mode 100644 arch/c6x/boot/dts/evmc6457.dts
  create mode 100644 arch/c6x/boot/dts/evmc6472.dts
  create mode 100644 arch/c6x/boot/dts/evmc6474.dts
  create mode 100644 arch/c6x/boot/dts/tms320c6455.dtsi
  create mode 100644 arch/c6x/boot/dts/tms320c6457.dtsi
  create mode 100644 arch/c6x/boot/dts/tms320c6472.dtsi
  create mode 100644 arch/c6x/boot/dts/tms320c6474.dtsi
  create mode 100644 arch/c6x/boot/linked_dtb.S
  create mode 100644 arch/c6x/configs/dsk6455_defconfig
  create mode 100644 arch/c6x/configs/evmc6457_defconfig
  create mode 100644 arch/c6x/configs/evmc6472_defconfig
  create mode 100644 arch/c6x/configs/evmc6474_defconfig
  create mode 100644 arch/c6x/include/asm/Kbuild
  create mode 100644 arch/c6x/include/asm/asm-offsets.h
  create mode 100644 arch/c6x/include/asm/bitops.h
  create mode 100644 arch/c6x/include/asm/byteorder.h
  create mode 100644 arch/c6x/include/asm/cache.h
  create mode 100644 arch/c6x/include/asm/cacheflush.h
  create mode 100644 arch/c6x/include/asm/checksum.h
  create mode 100644 arch/c6x/include/asm/clkdev.h
  create mode 100644 arch/c6x/include/asm/clock.h
  create mode 100644 arch/c6x/include/asm/delay.h
  create mode 100644 arch/c6x/include/asm/dma-mapping.h
  create mode 100644 arch/c6x/include/asm/dscr.h
  create mode 100644 arch/c6x/include/asm/elf.h
  create mode 100644 arch/c6x/include/asm/ftrace.h
  create mode 100644 arch/c6x/include/asm/hardirq.h
  create mode 100644 arch/c6x/include/asm/irq.h
  create mode 100644 arch/c6x/include/asm/irqflags.h
  create mode 100644 arch/c6x/include/asm/linkage.h
  create mode 100644 arch/c6x/include/asm/megamod-pic.h
  create mode 100644 arch/c6x/include/asm/mmu.h
  create mode 100644 arch/c6x/include/asm/module.h
  create mode 100644 arch/c6x/include/asm/mutex.h
  create mode 100644 arch/c6x/include/asm/page.h
  create mode 100644 arch/c6x/include/asm/pgtable.h
  create mode 100644 arch/c6x/include/asm/processor.h
  create mode 100644 arch/c6x/include/asm/procinfo.h
  create mode 100644 arch/c6x/include/asm/prom.h
  create mode 100644 arch/c6x/include/asm/ptrace.h
  create mode 100644 arch/c6x/include/asm/sections.h
  create mode 100644 arch/c6x/include/asm/setup.h
  create mode 100644 arch/c6x/include/asm/sigcontext.h
  create mode 100644 arch/c6x/include/asm/signal.h
  create mode 100644 arch/c6x/include/asm/soc.h
  create mode 100644 arch/c6x/include/asm/string.h
  create mode 100644 arch/c6x/include/asm/swab.h
  create mode 100644 arch/c6x/include/asm/syscall.h
  create mode 100644 arch/c6x/include/asm/syscalls.h
  create mode 100644 arch/c6x/include/asm/system.h
  create mode 100644 arch/c6x/include/asm/thread_info.h
  create mode 100644 arch/c6x/include/asm/timer64.h
  create mode 100644 arch/c6x/include/asm/timex.h
  create mode 100644 arch/c6x/include/asm/tlb.h
  create mode 100644 arch/c6x/include/asm/traps.h
  create mode 100644 arch/c6x/include/asm/uaccess.h
  create mode 100644 arch/c6x/include/asm/unaligned.h
  create mode 100644 arch/c6x/include/asm/unistd.h
  create mode 100644 arch/c6x/kernel/Makefile
  create mode 100644 arch/c6x/kernel/asm-offsets.c
  create mode 100644 arch/c6x/kernel/c6x_ksyms.c
  create mode 100644 arch/c6x/kernel/devicetree.c
  create mode 100644 arch/c6x/kernel/dma.c
  create mode 100644 arch/c6x/kernel/entry.S
  create mode 100644 arch/c6x/kernel/head.S
  create mode 100644 arch/c6x/kernel/irq.c
  create mode 100644 arch/c6x/kernel/module.c
  create mode 100644 arch/c6x/kernel/process.c
  create mode 100644 arch/c6x/kernel/ptrace.c
  create mode 100644 arch/c6x/kernel/setup.c
  create mode 100644 arch/c6x/kernel/signal.c
  create mode 100644 arch/c6x/kernel/soc.c
  create mode 100644 arch/c6x/kernel/switch_to.S
  create mode 100644 arch/c6x/kernel/sys_c6x.c
  create mode 100644 arch/c6x/kernel/time.c
  create mode 100644 arch/c6x/kernel/traps.c
  create mode 100644 arch/c6x/kernel/vectors.S
  create mode 100644 arch/c6x/kernel/vmlinux.lds.S
  create mode 100644 arch/c6x/lib/Makefile
  create mode 100644 arch/c6x/lib/checksum.c
  create mode 100644 arch/c6x/lib/csum_64plus.S
  create mode 100644 arch/c6x/lib/divi.S
  create mode 100644 arch/c6x/lib/divremi.S
  create mode 100644 arch/c6x/lib/divremu.S
  create mode 100644 arch/c6x/lib/divu.S
  create mode 100644 arch/c6x/lib/llshl.S
  create mode 100644 arch/c6x/lib/llshr.S
  create mode 100644 arch/c6x/lib/llshru.S
  create mode 100644 arch/c6x/lib/memcpy_64plus.S
  create mode 100644 arch/c6x/lib/mpyll.S
  create mode 100644 arch/c6x/lib/negll.S
  create mode 100644 arch/c6x/lib/pop_rts.S
  create mode 100644 arch/c6x/lib/push_rts.S
  create mode 100644 arch/c6x/lib/remi.S
  create mode 100644 arch/c6x/lib/remu.S
  create mode 100644 arch/c6x/lib/strasgi.S
  create mode 100644 arch/c6x/lib/strasgi_64plus.S
  create mode 100644 arch/c6x/mm/Makefile
  create mode 100644 arch/c6x/mm/dma-coherent.c
  create mode 100644 arch/c6x/mm/init.c
  create mode 100644 arch/c6x/platforms/Kconfig
  create mode 100644 arch/c6x/platforms/Makefile
  create mode 100644 arch/c6x/platforms/cache.c
  create mode 100644 arch/c6x/platforms/dscr.c
  create mode 100644 arch/c6x/platforms/emif.c
  create mode 100644 arch/c6x/platforms/megamod-pic.c
  create mode 100644 arch/c6x/platforms/platform.c
  create mode 100644 arch/c6x/platforms/pll.c
  create mode 100644 arch/c6x/platforms/plldata.c
  create mode 100644 arch/c6x/platforms/timer64.c
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Merge tag 'for-linux-3.3-merge-window' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming

* tag 'for-linux-3.3-merge-window' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming: (29 commits)
  C6X: replace tick_nohz_stop/restart_sched_tick calls
  C6X: add register_cpu call
  C6X: deal with memblock API changes
  C6X: fix timer64 initialization
  C6X: fix layout of EMIFA registers
  C6X: MAINTAINERS
  C6X: DSCR - Device State Configuration Registers
  C6X: EMIF - External Memory Interface
  C6X: general SoC support
  C6X: library code
  C6X: headers
  C6X: ptrace support
  C6X: loadable module support
  C6X: cache control
  C6X: clocks
  C6X: build infrastructure
  C6X: syscalls
  C6X: interrupt handling
  C6X: time management
  C6X: signal management
  ...
 2012-01-10 17:39:40 -08:00
Sonic Zhang
06d5e032ad include/asm-generic/page.h: calculate virt_to_page and page_to_virt via predefined macro 
On NOMMU architectures, if physical memory doesn't start from 0,
ARCH_PFN_OFFSET is defined to generate page index in mem_map array.
Because virtual address is equal to physical address, PAGE_OFFSET is
always 0.  virt_to_page and page_to_virt should not index page by
PAGE_OFFSET directly.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Cc: Greg Ungerer <gerg@snapgear.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2011-10-31 17:30:48 -07:00
Mark Salter
b7a0556e0f fixed generic page.h for non-zero PAGE_OFFSET 
asm-generic/page.h had several problems when used with a non-zero PAGE_OFFSET.
This patch adds a default ARCH_PFN_OFFSET and fixes the __va, __pa, and
pfn_valid macros to work with non-zero PAGE_OFFSETs.

Signed-off-by: Mark Salter <msalter@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
 2011-10-06 19:47:16 -04:00
Arnd Bergmann
5c01b46bb6 asm-generic: add generic NOMMU versions of some headers 
Memory management in generic is highly architecture specific,
but on NOMMU architectures, it is mostly trivial, so just
add a default implementation in asm-generic that applies
to all NOMMU architectures.

The two files cache.h and cacheflush.h can possibly also
be used by architectures that have an MMU but never require
flushing the cache or have cache lines larger than 32 bytes.

Signed-off-by: Remis Lima Baima <remis.developer@googlemail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
 2009-06-11 21:02:50 +02:00
Arnd Bergmann
5b17e1cd89 asm-generic: rename page.h and uaccess.h 
The current asm-generic/page.h only contains the get_order
function, and asm-generic/uaccess.h only implements
unaligned accesses. This renames the file to getorder.h
and uaccess-unaligned.h to make room for new page.h
and uaccess.h file that will be usable by all simple
(e.g. nommu) architectures.

Signed-off-by: Remis Lima Baima <remis.developer@googlemail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
 2009-06-11 21:02:17 +02:00
Robert P. J. Day
ae50884f66 remove __KERNEL__ tests of unexported headers under asm-generic/ 
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2008-04-30 08:29:54 -07:00
Linus Torvalds
38f3323037 Revert "[PATCH] LOG2: Alter get_order() so that it can make use of ilog2() on a constant" 
This reverts commit 39d61db0ed.

The commit was buggy in multiple ways:
 - the conversion to ilog2() was incorrect to begin with
 - it tested the wrong #defines, so on all architectures but FRV you'd
   never see the bug except for constant arguments.
 - the new "get_order()" macro used its arguments multiple times, and
   didn't even parenthesize them properly
 - despite the comments, it was not true that you could use it for
   constant initializers, since not all architectures even use the
   generic page.h header file.

All of the problems are individually fixable, but it all boils down to:
better just revert it, and re-do it from scratch.

Cc: David Howells <dhowells@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2007-03-06 19:38:01 -08:00
David Howells
39d61db0ed [PATCH] LOG2: Alter get_order() so that it can make use of ilog2() on a constant 
Alter get_order() so that it can make use of ilog2() on a constant to produce
a constant value, retaining the ability for an arch to override it in the
non-const case.

Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
 2006-12-08 08:28:51 -08:00
Stephen Rothwell
fd4fd5aac1 [PATCH] mm: consolidate get_order 
Someone mentioned that almost all the architectures used basically the same
implementation of get_order.  This patch consolidates them into
asm-generic/page.h and includes that in the appropriate places.  The
exceptions are ia64 and ppc which have their own (presumably optimised)
versions.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
 2005-09-05 00:05:39 -07:00