MIPS: Remove TX39XX support

No (active) developer owns this hardware, so let's remove Linux support.

Signed-off-by: Thomas Bogendoerfer <[email protected]>
Acked-by: Guenter Roeck <linux@ro

MIPS: Remove TX39XX support

No (active) developer owns this hardware, so let's remove Linux support.

Signed-off-by: Thomas Bogendoerfer <[email protected]>
Acked-by: Guenter Roeck <[email protected]>
Reviewed-by: Geert Uytterhoeven <[email protected]>
Tested-by: Geert Uytterhoeven <[email protected]>
Acked-by: Atsushi Nemoto <[email protected]>

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MIPS: uaccess: Added __get/__put_kernel_nofault

Added __get/__put_kernel_nofault as preparation for removing
get/set_fs.

Signed-off-by: Thomas Bogendoerfer <[email protected]>
Reviewed-by:

MIPS: uaccess: Added __get/__put_kernel_nofault

Added __get/__put_kernel_nofault as preparation for removing
get/set_fs.

Signed-off-by: Thomas Bogendoerfer <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>

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MIPS: Add support for CONFIG_DEBUG_VIRTUAL

Provide hooks to intercept bad usages of virt_to_phys() and
__pa_symbol() throughout the kernel. To make this possible, we need to
rename the current imple

MIPS: Add support for CONFIG_DEBUG_VIRTUAL

Provide hooks to intercept bad usages of virt_to_phys() and
__pa_symbol() throughout the kernel. To make this possible, we need to
rename the current implement of virt_to_phys() into
__virt_to_phys_nodebug() and wrap it around depending on
CONFIG_DEBUG_VIRTUAL.

A similar thing is needed for __pa_symbol() which is now aliased to
__phys_addr_symbol() whose implementation is either the direct return of
RELOC_HIDE or goes through the debug version.

Signed-off-by: Florian Fainelli <[email protected]>
Signed-off-by: Thomas Bogendoerfer <[email protected]>

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MIPS: move ioremap_prot und iounmap out of line

Neither of these interfaces is anywhere near the fast path. Move them
out of line and avoid exposing implementation details to the drivers.

Signed-o

MIPS: move ioremap_prot und iounmap out of line

Neither of these interfaces is anywhere near the fast path. Move them
out of line and avoid exposing implementation details to the drivers.

Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Thomas Bogendoerfer <[email protected]>

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MIPS: Select R3k-style TLB in Kconfig

Currently areas where we need to determine whether the TLB is R3k-style
need to check for either of CONFIG_CPU_R3000 || CONFIG_CPU_TX39XX.

Introduce a new CONF

MIPS: Select R3k-style TLB in Kconfig

Currently areas where we need to determine whether the TLB is R3k-style
need to check for either of CONFIG_CPU_R3000 || CONFIG_CPU_TX39XX.

Introduce a new CONFIG_CPU_R3K_TLB & select it from both of the above,
allowing us to simplify checks for R3k-style TLBs by only checking for
this new Kconfig option.

Signed-off-by: Paul Burton <[email protected]>
Reviewed-by: Philippe Mathieu-Daudé <[email protected]>
Cc: [email protected]

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MIPS: Remove unused R8000 CPU support

Our R8000 CPU support can only be included if a system selects
CONFIG_SYS_HAS_CPU_R8000. No system does, making all R8000-related CPU
support dead code. Remove

MIPS: Remove unused R8000 CPU support

Our R8000 CPU support can only be included if a system selects
CONFIG_SYS_HAS_CPU_R8000. No system does, making all R8000-related CPU
support dead code. Remove it.

Signed-off-by: Paul Burton <[email protected]>
Cc: [email protected]

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MIPS: use the generic get_user_pages_fast code

The mips code is mostly equivalent to the generic one, minus various
bugfixes and an arch override for gup_fast_permitted.

Note that this defines ARCH

MIPS: use the generic get_user_pages_fast code

The mips code is mostly equivalent to the generic one, minus various
bugfixes and an arch override for gup_fast_permitted.

Note that this defines ARCH_HAS_PTE_SPECIAL for mips as mips has
pte_special and pte_mkspecial implemented and used in the existing gup
code. They are no-op stubs, though which makes me a little unsure if this
is really right thing to do.

Note that this also adds back a missing cpu_has_dc_aliases check for
__get_user_pages_fast, which the old code was only doing for
get_user_pages_fast. This clearly looks like an oversight, as any
condition that makes get_user_pages_fast unsafe also applies to
__get_user_pages_fast.

[[email protected]: MIPS: don't select ARCH_HAS_PTE_SPECIAL]
Link: http://lkml.kernel.org/r/[email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Christoph Hellwig <[email protected]>
Reviewed-by: Jason Gunthorpe <[email protected]>
Tested-by: Guenter Roeck <[email protected]>
Cc: Ralf Baechle <[email protected]>
Cc: Andrey Konovalov <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: David Miller <[email protected]>
Cc: James Hogan <[email protected]>
Cc: Khalid Aziz <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Nicholas Piggin <[email protected]>
Cc: Paul Burton <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Rich Felker <[email protected]>
Cc: Yoshinori Sato <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

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MIPS: mm: Un-inline get_new_mmu_context

In preparation for adding MMID support to get_new_mmu_context() which
will increase the size of the function somewhat, move it from
asm/mmu_context.h into a C

MIPS: mm: Un-inline get_new_mmu_context

In preparation for adding MMID support to get_new_mmu_context() which
will increase the size of the function somewhat, move it from
asm/mmu_context.h into a C file.

Signed-off-by: Paul Burton <[email protected]>
Cc: [email protected]

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MIPS: mm: Split obj-y to a file per line

Split always-included objects to one per line in order to make it easier
to modify the list of included objects.

Signed-off-by: Paul Burton <paul.burton@mip

MIPS: mm: Split obj-y to a file per line

Split always-included objects to one per line in order to make it easier
to modify the list of included objects.

Signed-off-by: Paul Burton <[email protected]>
Cc: [email protected]

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MIPS: remove mips_swiotlb_ops

mips_swiotlb_ops differs from the generic swiotlb_dma_ops only in that
it contains a mb() barrier after each operations that maps or syncs
dma memory to the device.

Th

MIPS: remove mips_swiotlb_ops

mips_swiotlb_ops differs from the generic swiotlb_dma_ops only in that
it contains a mb() barrier after each operations that maps or syncs
dma memory to the device.

The dma operations are defined to not be memory barriers, but instead
the write* operations to kick the DMA off are supposed to contain them.

For mips this handled by war_io_reorder_wmb(), which evaluates to the
stronger wmb() instead of the pure compiler barrier barrier() for
just those platforms that use swiotlb, so I think we are covered
properly.

[[email protected]:
- Include linux/swiotlb.h to fix build failures for configs with
CONFIG_SWIOTLB=y.]

Signed-off-by: Christoph Hellwig <[email protected]>
Signed-off-by: Paul Burton <[email protected]>
Patchwork: https://patchwork.linux-mips.org/patch/20038/
Cc: David Daney <[email protected]>
Cc: Huacai Chen <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]

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MIPS: remove the old dma-default implementation

Now unused.

Signed-off-by: Christoph Hellwig <[email protected]>
Patchwork: https://patchwork.linux-mips.org/patch/19551/
Signed-off-by: Paul Burton <paul.b

MIPS: remove the old dma-default implementation

Now unused.

Signed-off-by: Christoph Hellwig <[email protected]>
Patchwork: https://patchwork.linux-mips.org/patch/19551/
Signed-off-by: Paul Burton <[email protected]>
Cc: Florian Fainelli <[email protected]>
Cc: David Daney <[email protected]>
Cc: Kevin Cernekee <[email protected]>
Cc: Jiaxun Yang <[email protected]>
Cc: Tom Bogendoerfer <[email protected]>
Cc: Huacai Chen <[email protected]>
Cc: [email protected]
Cc: [email protected]

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MIPS: use generic dma noncoherent ops for simple noncoherent platforms

Convert everything not overriding dma-coherence.h to the generic
noncoherent ops. The new dma-noncoherent.c file duplicates a

MIPS: use generic dma noncoherent ops for simple noncoherent platforms

Convert everything not overriding dma-coherence.h to the generic
noncoherent ops. The new dma-noncoherent.c file duplicates a lot of
the code in dma-default.c, but that file will be gone by the end of
this series.

Signed-off-by: Christoph Hellwig <[email protected]>
Patchwork: https://patchwork.linux-mips.org/patch/19544/
Signed-off-by: Paul Burton <[email protected]>
Cc: Florian Fainelli <[email protected]>
Cc: David Daney <[email protected]>
Cc: Kevin Cernekee <[email protected]>
Cc: Jiaxun Yang <[email protected]>
Cc: Tom Bogendoerfer <[email protected]>
Cc: Huacai Chen <[email protected]>
Cc: [email protected]
Cc: [email protected]

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MIPS: make the default mips dma implementation optional

Octeon and loonson64 already don't use it at all, and we're going to
migrate more plaforms away from it.

Signed-off-by: Christoph Hellwig <hc

MIPS: make the default mips dma implementation optional

Octeon and loonson64 already don't use it at all, and we're going to
migrate more plaforms away from it.

Signed-off-by: Christoph Hellwig <[email protected]>
Patchwork: https://patchwork.linux-mips.org/patch/19536/
Signed-off-by: Paul Burton <[email protected]>
Cc: Florian Fainelli <[email protected]>
Cc: David Daney <[email protected]>
Cc: Kevin Cernekee <[email protected]>
Cc: Jiaxun Yang <[email protected]>
Cc: Tom Bogendoerfer <[email protected]>
Cc: Huacai Chen <[email protected]>
Cc: [email protected]
Cc: [email protected]

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MIPS: consolidate the swiotlb implementations

Octeon and Loongson share exactly the same code, move it into a common
implementation, and use that implementation directly from get_arch_dma_ops.

Also

MIPS: consolidate the swiotlb implementations

Octeon and Loongson share exactly the same code, move it into a common
implementation, and use that implementation directly from get_arch_dma_ops.

Also provide the expected dma-direct.h helpers directly instead of
delegating to platform dma-coherence.h headers.

Signed-off-by: Christoph Hellwig <[email protected]>
Patchwork: https://patchwork.linux-mips.org/patch/19534/
Signed-off-by: Paul Burton <[email protected]>
Cc: Florian Fainelli <[email protected]>
Cc: David Daney <[email protected]>
Cc: Kevin Cernekee <[email protected]>
Cc: Jiaxun Yang <[email protected]>
Cc: Tom Bogendoerfer <[email protected]>
Cc: Huacai Chen <[email protected]>
Cc: [email protected]
Cc: [email protected]

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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

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 <[email protected]>
Reviewed-by: Philippe Ombredanne <[email protected]>
Reviewed-by: Thomas Gleixner <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

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MIPS: Move pgd_alloc() out of header

pgd_alloc() references init_mm which is not exported to modules. In
order for KVM to be able to use pgd_alloc() to allocate GVA page tables,
move pgd_alloc() int

MIPS: Move pgd_alloc() out of header

pgd_alloc() references init_mm which is not exported to modules. In
order for KVM to be able to use pgd_alloc() to allocate GVA page tables,
move pgd_alloc() into a new pgtable.c file and export it to modules.

Signed-off-by: James Hogan <[email protected]>
Acked-by: Ralf Baechle <[email protected]>
Cc: Ralf Baechle <[email protected]>
Cc: Paolo Bonzini <[email protected]>
Cc: "Radim Krčmář" <[email protected]>
Cc: [email protected]
Cc: [email protected]

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MIPS: Allow L2 prefetch to be configured via debugfs

When debugging or examining the performance of a system it can be useful
to examine the effect of L2 prefetching. Provide an optional debugfs
ent

MIPS: Allow L2 prefetch to be configured via debugfs

When debugging or examining the performance of a system it can be useful
to examine the effect of L2 prefetching. Provide an optional debugfs
entry to allow a user to enable or disable L2 prefetching.

Signed-off-by: Paul Burton <[email protected]>
Cc: Maciej W. Rozycki <[email protected]>
Cc: [email protected]
Cc: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/11182/
Signed-off-by: Ralf Baechle <[email protected]>

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MIPS: mm: Only build one microassembler that is suitable

The microMIPS microassembler is only suitable for configurations where
the kernel itself is built to microMIPS machine code and not where onl

MIPS: mm: Only build one microassembler that is suitable

The microMIPS microassembler is only suitable for configurations where
the kernel itself is built to microMIPS machine code and not where only
user microMIPS software is supported. The former is controlled with the
CPU_MICROMIPS configuration setting, whereas SYS_SUPPORTS_MICROMIPS is
used for the latter.

Not only that, but with a given microMIPS vs standard MIPS kernel
configuration only one microassembler is needed, that matches the ISA
selected -- CP0.Config3.ISAOnExc is mandatory on microMIPS processors,
so there is never a need to mix microMIPS and standard MIPS code.

Consequently build only the microassembler that matches the ISA selected
for the kernel.

Signed-off-by: Maciej W. Rozycki <[email protected]>
Cc: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/8479/
Signed-off-by: Ralf Baechle <[email protected]>

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MIPS: Move generated code to .text for microMIPS

Prepare of a next patch which will call tlbmiss_handler_setup_pgd on
microMIPS. MicroMIPS complains if the called code s not in the .text
section. To

MIPS: Move generated code to .text for microMIPS

Prepare of a next patch which will call tlbmiss_handler_setup_pgd on
microMIPS. MicroMIPS complains if the called code s not in the .text
section. To fix this we generate code into space reserved in
arch/mips/mm/tlb-funcs.S

While there, move the rest of the generated functions (handle_tlbl,
handle_tlbs, handle_tlbm) to the same file.

Signed-off-by: Jayachandran C <[email protected]>
Cc: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/5542/
Signed-off-by: Ralf Baechle <[email protected]>

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MIPS: microMIPS: uasm: Add microMIPS micro assembler support.

Add new file 'uasm-micromips.c' that allows the micro assembler
to generate microMIPS ISA code. It can be included in the kernel
alongsi

MIPS: microMIPS: uasm: Add microMIPS micro assembler support.

Add new file 'uasm-micromips.c' that allows the micro assembler
to generate microMIPS ISA code. It can be included in the kernel
alongside the classic ISA as long as the platform supports the
microMIPS ISA.

Signed-off-by: Steven J. Hill <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/4923/
Signed-off-by: Ralf Baechle <[email protected]>
(cherry picked from commit 5f011a866afbd03a5379f67f4e70e5efbdfc16e9)

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MIPS: microMIPS: uasm: Split 'uasm.c' into two files.

Split 'uasm.c' into two files. The new file 'uasm-mips.c' has the
functions specific to the classic MIPS ISA. The 'uasm.c' file
contains common

MIPS: microMIPS: uasm: Split 'uasm.c' into two files.

Split 'uasm.c' into two files. The new file 'uasm-mips.c' has the
functions specific to the classic MIPS ISA. The 'uasm.c' file
contains common code that can be used by classic or other ISAs
that could be supported by the kernel.

Signed-off-by: Steven J. Hill <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/4922/
Signed-off-by: Ralf Baechle <[email protected]>
(cherry picked from commit 0961103562ab958fa74f35043bf4f72e51ed6155)

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MIPS: Whitespace cleanup.

Having received another series of whitespace patches I decided to do this
once and for all rather than dealing with this kind of patches trickling
in forever.

Signed-off-b

MIPS: Whitespace cleanup.

Having received another series of whitespace patches I decided to do this
once and for all rather than dealing with this kind of patches trickling
in forever.

Signed-off-by: Ralf Baechle <[email protected]>

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MIPS: introduce CPU_R4K_CACHE_TLB

R4K-style CPUs having common code to support their caches and tlb have this
boolean defined by default. Allows us to remove some lines in
arch/mips/mm/Makefile.

Si

MIPS: introduce CPU_R4K_CACHE_TLB

R4K-style CPUs having common code to support their caches and tlb have this
boolean defined by default. Allows us to remove some lines in
arch/mips/mm/Makefile.

Signed-off-by: Florian Fainelli <[email protected]>
Patchwork: http://patchwork.linux-mips.org/patch/3328/
Signed-off-by: John Crispin <[email protected]>

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MIPS: Refactor 'clear_page' and 'copy_page' functions.

Remove usage of the '__attribute__((alias("...")))' hack that aliased
to integer arrays containing micro-assembled instructions. This hack
brea

MIPS: Refactor 'clear_page' and 'copy_page' functions.

Remove usage of the '__attribute__((alias("...")))' hack that aliased
to integer arrays containing micro-assembled instructions. This hack
breaks when building a microMIPS kernel. It also makes the code much
easier to understand.

[[email protected]: Added back export of the clear_page and copy_page
symbols so certain modules will work again. Also fixed build with
CONFIG_SIBYTE_DMA_PAGEOPS enabled.]

Signed-off-by: Steven J. Hill <[email protected]>
Cc: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/3866/
Acked-by: David Daney <[email protected]>
Signed-off-by: Ralf Baechle <[email protected]>

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MIPS: Netlogic: Add XLP makefiles and config

- Add CPU_XLP and NLM_XLR_BOARD to arch/mips/Kconfig for Netlogic XLP boards
- Update mips Makefiles to add XLP

Signed-off-by: Jayachandran C <jayachand

MIPS: Netlogic: Add XLP makefiles and config

- Add CPU_XLP and NLM_XLR_BOARD to arch/mips/Kconfig for Netlogic XLP boards
- Update mips Makefiles to add XLP

Signed-off-by: Jayachandran C <[email protected]>
Cc: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/2968/
Signed-off-by: Ralf Baechle <[email protected]>

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