Ralf Baechle [Wed, 16 Oct 2013 15:10:07 +0000 (17:10 +0200)]
MIPS: MT: proc: Add support for printing VPE and TC ids
And there are more CPUs or configurations that want to provide special
per-CPU information in /proc/cpuinfo. So I think there needs to be a
hook mechanism, such as a notifier.
This is a first cut only; I need to think about what sort of looking
the notifier needs to have. But I'd appreciate testing on MT hardware!
Paul Burton [Tue, 19 Nov 2013 17:30:36 +0000 (17:30 +0000)]
MIPS: Simplify ptrace_getfpregs FPU IR retrieval
All architecturally defined bits in the FPU implementation register
are read only & unchanging. It contains some implementation-defined
bits but the architecture manual states "This bits are explicitly not
intended to be used for mode control functions" which seems to provide
justification for viewing the register as a whole as unchanging. This
being the case we can simply re-use the value we read at boot rather
than having to re-read it later, and avoid the complexity which that
read entails.
Paul Burton [Tue, 19 Nov 2013 17:30:35 +0000 (17:30 +0000)]
MIPS: Simplify PTRACE_PEEKUSR for FPC_EIR
All architecturally defined bits in the FPU implementation register
are read only & unchanging. It contains some implementation-defined
bits but the architecture manual states "This bits are explicitly not
intended to be used for mode control functions" which seems to provide
justification for viewing the register as a whole as unchanging. This
being the case we can simply re-use the value we read at boot rather
than having to re-read it later, and avoid the complexity which that
read entails.
Paul Gortmaker [Wed, 22 Jan 2014 20:21:30 +0000 (15:21 -0500)]
MIPS: SEAD3: Don't use module_init in non-modular sead3-mtd.c code
The sead3-mtd.o is built for obj-y -- and hence this code is always
present. It will never be modular, so using module_init as an alias
for __initcall can be somewhat misleading.
Fix this up now, so that we can relocate module_init from
init.h into module.h in the future. If we don't do this, we'd
have to add module.h to obviously non-modular code, and that
would be a worse thing.
Note that direct use of __initcall is discouraged, vs. one
of the priority categorized subgroups. As __initcall gets
mapped onto device_initcall, our use of device_initcall
directly in this change means that the runtime impact is
zero -- it will remain at level 6 in initcall ordering.
We also fix a missing semicolon, which this change uncovers.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Reported-by: kbuild test robot <fengguang.wu@intel.com> Cc: linux-mips@linux-mips.org Cc: fengguang.wu@intel.com
Patchwork: https://patchwork.linux-mips.org/patch/6412/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Huacai Chen [Sun, 16 Feb 2014 08:01:18 +0000 (16:01 +0800)]
MIPS: Loongson: Rename PRID_IMP_LOONGSON1 and PRID_IMP_LOONGSON2
Loongson-1 is a 32-bit MIPS CPU and Loongson-2/3 are 64-bit MIPS CPUs,
and both Loongson-2/3 has the same PRID IMP filed (0x6300). As a
result, renaming PRID_IMP_LOONGSON1 and PRID_IMP_LOONGSON2 to
PRID_IMP_LOONGSON_32 and PRID_IMP_LOONGSON_64 will make more sense.
Signed-off-by: Huacai Chen <chenhc@lemote.com> Tested-by: Alex Smith <alex.smith@imgtec.com> Reviewed-by: Alex Smith <alex.smith@imgtec.com> Cc: John Crispin <john@phrozen.org> Cc: Steven J. Hill <Steven.Hill@imgtec.com> Cc: Aurelien Jarno <aurelien@aurel32.net> Cc: linux-mips@linux-mips.org Cc: Fuxin Zhang <zhangfx@lemote.com> Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/6552/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Paul Bolle [Sat, 8 Feb 2014 21:46:58 +0000 (22:46 +0100)]
MIPS: No need to select ARCH_SUPPORTS_MSI
Commit c24a8a7a9988 ("MIPS: Netlogic: Add MSI support for XLP") added
"select ARCH_SUPPORTS_MSI". But the Kconfig symbol ARCH_SUPPORTS_MSI was
already removed in v3.12, so that select is a nop. Drop it.
Signed-off-by: Paul Bolle <pebolle@tiscali.nl> Cc: Jayachandran C <jchandra@broadcom.com> Cc: John Crispin <blogic@openwrt.org> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/6521/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Jingoo Han [Mon, 10 Feb 2014 01:12:38 +0000 (10:12 +0900)]
MIPS: JZ4740: Don't select HAVE_PWM
The HAVE_PWM symbol is only for legacy platforms that provide the PWM
API without using the generic framework. The jz4740 platform uses the
generic PWM framework, after the commit "f6b8a57 pwm: Add Ingenic
JZ4740 support".
Paul Gortmaker [Thu, 23 Jan 2014 16:46:41 +0000 (11:46 -0500)]
MIPS: Restore init.h usage to arch/mips/ar7/time.c
Commit 0046be10e0c502705fc74d91408eba13a73bc201 ("mips: delete
non-required instances of include <linux/init.h>") inadvertently
removed an include that was actually correct. Restore it.
Note that it gets init.h implicitly anyway, so this is largely a
cosmetic fixup; no build regressions were caused by this.
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: John Crispin <blogic@openwrt.org> Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6416/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Cody P Schafer [Sun, 2 Mar 2014 16:49:29 +0000 (17:49 +0100)]
MIPS: BCM47XX: Add Belkin F7Dxxxx board detection
Add a few Belkin F7Dxxxx entries, with F7D4401 sourced from online
documentation and the "F7D7302" being observed. F7D3301, F7D3302, and F7D4302 are reasonable guesses which are unlikely to cause
mis-detection.
Hauke Mehrtens [Sun, 2 Mar 2014 16:49:28 +0000 (17:49 +0100)]
MIPS: BCM47XX: Add detection and GPIO config for Siemens SE505v2
This adds board detection for the Siemens SE505v2 and the led gpio
configuration. This board does not have any buttons.
This is based on OpenWrt broadcom-diag and Manuel Munz's nvram dump.
Hauke Mehrtens [Sun, 2 Mar 2014 16:49:26 +0000 (17:49 +0100)]
MIPS: BCM47XX: Detect some more Linksys devices
The Linksys WRT54G/GS/GL family uses the same boardtype numbers, and
the same gpio configuration. The boardtype numbers are changing with
the hardware versions, but these hardware numbers are different or each
model.
Detect them all as one device, this also worked in OpenWrt.
Leonid Yegoshin [Tue, 4 Mar 2014 13:34:43 +0000 (13:34 +0000)]
MIPS: Add support for the M5150 processor
The M5150 core is a 32-bit MIPS RISC which implements the
MIPS Architecture Release-5 in a 5-stage pipeline.
In addition, it includes the MIPS Architecture Virtualization Module
that enables virtualization of operating systems,
which provides a scalable, trusted, and secure execution environment.
Paul Burton [Thu, 20 Feb 2014 14:00:27 +0000 (14:00 +0000)]
MIPS: Default NR_CPUS=8 for malta SMP defconfigs
The previous NR_CPUS=2 default is not an optimal default for current
Malta setups where it is common to have more than 2 CPUs available. It
makes sense to increase this to a number which covers all common setups
currently in use, such that all of those cores are usable. 8 seems to
fit that description.
If the user has less than 8 CPUs & they wish to have a more optimal
kernel they can simply reduce this in their config. It makes sense for
the default to work on as many systems as possible.
Paul Burton [Thu, 20 Feb 2014 14:00:26 +0000 (14:00 +0000)]
MIPS: Set page size to 16KB for malta SMP defconfigs
For Malta defconfigs which may run on an SMP configuration without
hardware cache anti-aliasing, a 16KB page size is a safer default.
Most notably at the moment it will avoid cache aliasing issues for
multicore proAptiv systems.
Markos Chandras [Thu, 20 Feb 2014 14:00:25 +0000 (14:00 +0000)]
MIPS: Malta: Enable DEVTMPFS
Recent versions of udev and systemd require the kernel
to be compiled with CONFIG_DEVTMPFS in order to populate
the /dev directory. Most MIPS platforms have it enabled by
default, so enable it for Malta configs as well.
Paul Burton [Thu, 20 Feb 2014 14:00:24 +0000 (14:00 +0000)]
MIPS: Regenerate malta defconfigs
This patch simply regenerates the malta defconfigs such that they don't
change after being used & saved as a defconfig again. ie. it is the
result of running the following:
for cfg in arch/mips/configs/malta*; do
ARCH=mips make `basename ${cfg}`
ARCH=mips make savedefconfig
mv -v defconfig ${cfg}
done
Manuel Lauss [Wed, 26 Mar 2014 14:05:21 +0000 (15:05 +0100)]
MIPS: Alchemy: pata_platform for DB1200
The au1xxx-ide driver isn't any faster than pata_platform since it
spends a lot of time busy waiting for DMA to finish; faster PIO/DMA
modes only work on the db1200 with a certain cpu speed, UDMA is broken,
and finally the old IDE layer is on death row, so time to switch to
the newer ATA layer.
Manuel Lauss [Thu, 20 Feb 2014 13:59:23 +0000 (14:59 +0100)]
MIPS: Alchemy: Determine cohereny at runtime based on cpu type
All Alchemy chips have coherent DMA, but for example the USB or AC97
peripherals on the Au1000/1500/1100 are not.
This patch uses DMA_MAYBE_COHERENT on Alchemy and sets coherentio based
on CPU type.
Use a Malta specific function to free the init section once the
kernel has booted. When operating in EVA mode, the physical memory
is shifted to 0x80000000. Kernel is loaded into 0x80000000 (virtual)
so the offset between physical and virtual addresses is 0.
Markos Chandras [Wed, 15 Jan 2014 14:13:05 +0000 (14:13 +0000)]
MIPS: malta: malta-memory: Use the PHYS_OFFSET to build the memory map
PHYS_OFFSET is used to denote the physical start address of the
first bank of RAM. When the Malta board is in EVA mode, the physical
start address of RAM is shifted to 0x80000000 so it's necessary to use
this macro in order to make the code EVA agnostic.
Markos Chandras [Wed, 15 Jan 2014 13:55:07 +0000 (13:55 +0000)]
MIPS: malta: malta-memory: Add support for the 'ememsize' variable
The 'ememsize' variable is used to denote the real RAM which is
present on the Malta board. This is different compared to 'memsize'
which is capped to 256MB. The 'ememsize' is used to get the actual
physical memory when setting up the Malta memory layout. This only
makes sense in case the core operates in the EVA mode, and it's
ignored otherwise.
Markos Chandras [Wed, 15 Jan 2014 11:18:56 +0000 (11:18 +0000)]
MIPS: malta: Configure Segment Control registers for EVA boot
The Malta board aliases 0x80000000 - 0xffffffff to 0x00000000
- 0x7fffffff ignoring the 256 MB IO hole in 0x10000000.
The physical memory is shifted to 0x80000000 so up to 2GB
can be used. Kuseg is expanded to 3GB (due to board limitations
only 2GB can be accessed) and lowmem (kernel space) is expanded to 2GB.
The Segment Control registers are programmed as follows:
Leonid Yegoshin [Tue, 21 Jan 2014 09:48:48 +0000 (09:48 +0000)]
MIPS: mm: c-r4k: Flush scache to avoid cache aliases
There is a chance for the secondary cache to have memory
aliases. This can happen if the bootloader is in a non-EVA mode
(or even in EVA mode but with different mapping from the kernel)
and the kernel switching to EVA afterwards. It's best to flush
the icache to avoid having the secondary CPUs fetching stale
data from it.
Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Markos Chandras [Wed, 15 Jan 2014 14:06:03 +0000 (14:06 +0000)]
MIPS: mm: init: Add free_init_pages() callback for EVA
A core in EVA mode can have any possible segment mapping, so the
default free_initmem_default() function may not always work as expected.
Therefore, add a callback that platforms can use to free up the init section.
Leonid Yegoshin [Mon, 16 Dec 2013 12:06:55 +0000 (12:06 +0000)]
MIPS: kernel: {ftrace,kgdb}: Set correct address limit for cache flushes
When flushing the icache, make sure the address limit is correct
so the appropriate 'cache' instruction will be used. This has no
impact on cores operating in non-eva mode. However, when EVA is
enabled, we ensure that 'cache' will be used instead of 'cachee'.
Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Leonid Yegoshin [Mon, 16 Dec 2013 11:46:33 +0000 (11:46 +0000)]
MIPS: asm: r4kcache: Add EVA cache flushing functions
Add EVA cache flushing functions similar to non-EVA configurations.
Because the cache may or may not contain user virtual addresses, we
need to use the 'cache' or 'cachee' instruction based on whether we
flush the cache on behalf of kernel or user respectively.
Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Leonid Yegoshin [Tue, 17 Dec 2013 09:30:13 +0000 (09:30 +0000)]
MIPS: asm: checksum: Add MIPS specific csum_and_copy_from_user function
A MIPS specific csum_and_copy_from_user function is necessary because
the generic one from include/net/checksum.h will not work for EVA.
This is because the generic one will link to symbols from lib/checksum.c
which are not EVA aware.
Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Leonid Yegoshin [Thu, 19 Dec 2013 17:09:17 +0000 (17:09 +0000)]
MIPS: asm: checksum: Split kernel and user copy operations
In EVA mode, different instructions need to be used to read/write
from kernel and userland. In non-EVA mode, there is no functional
difference. The current address limit is checked to decide the
type of operation that will be performed.
Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Markos Chandras [Fri, 17 Jan 2014 10:48:46 +0000 (10:48 +0000)]
MIPS: lib: csum_partial: Add macro to build csum_partial symbols
In preparation for EVA support, we use a macro to build the
__csum_partial_copy_user main code so it can be shared across
multiple implementations. EVA uses the same code but it replaces
the load/store/prefetch instructions with the EVA specific ones
therefore using a macro avoids unnecessary code duplications.
Markos Chandras [Thu, 16 Jan 2014 17:02:13 +0000 (17:02 +0000)]
MIPS: lib: csum_partial: Merge EXC and load/store macros
Each load/store macro always adds an entry to the __ex_table
using the EXC macro. There are cases where a load instruction may
never fail such as when we are sure the load happens in the kernel
address space. Therefore, we merge these the EXC and LOADX/STOREX
macros into a single one. We also expand the argument list in the EXC
macro to make the macro more flexible. The extra 'type' argument is not
used by this commit, but it will be used when EVA support is added to
memcpy.
Markos Chandras [Thu, 12 Dec 2013 16:21:00 +0000 (16:21 +0000)]
MIPS: checksum: Split the 'copy_user' symbol
The 'copy_user' symbol can be used to copy from or to
userland so we will use two different symbols for these
operations. This makes no difference in the existing code,
but when the core is operating in EVA mode, different instructions
need to be used to read and write to userland address space.
The old function has also been renamed to 'copy_kernel' to denote
that it is suitable for copy data to and from kernel space.
Markos Chandras [Fri, 3 Jan 2014 14:55:02 +0000 (14:55 +0000)]
MIPS: asm: uaccess: Add EVA support for str*_user operations
The str*_user functions are used to securely access NULL terminated
strings from userland. Therefore, it's necessary to use the appropriate
EVA function. However, if the string is in kernel space, then the normal
instructions are being used to access it. The __str*_kernel_asm and
__str*_user_asm symbols are the same for non-EVA mode so there is no
functional change for the non-EVA kernels.
Markos Chandras [Wed, 11 Dec 2013 16:47:10 +0000 (16:47 +0000)]
MIPS: asm: uaccess: Add EVA support to copy_{in, to,from}_user
Use the EVA specific functions from memcpy.S to perform
userspace operations. When get_fs() == get_ds() the usual load/store
instructions are used because the destination address is located in
the kernel address space region. Otherwise, the EVA specifc load/store
instructions are used which will go through th TLB to perform the virtual
to physical translation for the userspace address.
Leonid Yegoshin [Tue, 17 Dec 2013 15:20:24 +0000 (15:20 +0000)]
MIPS: asm: uaccess: Disable unaligned access macros for EVA
ulb, ulh, ulw are macros which emulate unaligned access for MIPS.
However, no such macros exist for EVA mode, so the only way to do
EVA unaligned accesses is in the ADE exception handler. As a result
of which, disable these macros for EVA.
Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Markos Chandras [Tue, 17 Dec 2013 13:15:40 +0000 (13:15 +0000)]
MIPS: asm: uaccess: Add instruction argument to __{put,get}_user_asm
In preparation for EVA support, an instruction argument is needed
for the __get_user_asm{,_ll32} functions to allow instruction overrides in
EVA mode. Even though EVA only works for MIPS 32-bit, both codepaths are
changed (32-bit and 64-bit) for consistency reasons.
Markos Chandras [Fri, 3 Jan 2014 10:11:45 +0000 (10:11 +0000)]
MIPS: lib: memset: Add EVA support for the __bzero function.
Build the __bzero function using the EVA load/store instructions
when operating in the EVA mode. This function is only used when
accessing user code so there is no need to build two distinct symbols
for user and kernel operations respectively.
Markos Chandras [Fri, 3 Jan 2014 09:23:16 +0000 (09:23 +0000)]
MIPS: lib: memset: Use macro to build the __bzero symbol
Build the __bzero symbol using a macor. In EVA mode we will
need to use similar code to do the userspace load operations so
it is better if we use a macro to avoid code duplications.
Markos Chandras [Tue, 7 Jan 2014 16:20:22 +0000 (16:20 +0000)]
MIPS: lib: memcpy: Add EVA support
Add copy_{to,from,in}_user when the CPU operates in EVA mode.
This is necessary so the EVA specific instructions can be used
to perform the virtual to physical translation for user space
addresses. We will use the non-EVA functions to read from kernel
if needed.
Markos Chandras [Tue, 7 Jan 2014 15:59:03 +0000 (15:59 +0000)]
MIPS: lib: memcpy: Split source and destination prefetch macros
In preparation for EVA support, the PREF macro is split into two
separate macros, PREFS and PREFD, for source and destination data
prefetching respectively.
Markos Chandras [Tue, 7 Jan 2014 12:57:04 +0000 (12:57 +0000)]
MIPS: lib: memcpy: Merge EXC and load/store macros
Each load/store macro always adds an entry to the __ex_table
using the EXC macro. Therefore, these load/store macros are now merged
with the EXC one. The argument list is also expanded in order to make
the macro more flexible. The extra 'type' argument is not used by this
commit, but it will be used when the EVA support is added to the memcpy.
Markos Chandras [Thu, 2 Jan 2014 16:40:20 +0000 (16:40 +0000)]
MIPS: lib: strncpy_user: Add EVA support
In non-EVA mode, strncpy_from_user* aliases are used for the
strncpy_from_kernel* symbols since the code is identical. In EVA
mode, new strcpy_from_user* symbols are used which use the EVA
specific instructions to load values from userspace.
Markos Chandras [Thu, 2 Jan 2014 16:36:49 +0000 (16:36 +0000)]
MIPS: lib: strncpy_user: Use macro to build the strncpy_from_user symbol
Build the __strncpy_from_user symbol using a macro. In EVA mode we will
need to use similar code to do the userspace load operations so
it is better if we use a macro to avoid code duplications.
Markos Chandras [Thu, 2 Jan 2014 16:04:38 +0000 (16:04 +0000)]
MIPS: lib: strlen_user: Add EVA support
In non-EVA mode, strlen_user* aliases are used for the
strlen_kernel* symbols since the code is identical. In EVA
mode, new strlen_user* symbols are used which use the EVA
specific instructions to load values from userspace.
Markos Chandras [Thu, 2 Jan 2014 15:55:58 +0000 (15:55 +0000)]
MIPS: lib: strlen_user: Use macro to build the strlen_user symbol
Build the __strlen_user symbol using a macro. In EVA mode we will
need to use similar code to do the userspace load operations so
it is better if we use a macro to avoid code duplications.
Markos Chandras [Mon, 9 Dec 2013 15:28:10 +0000 (15:28 +0000)]
MIPS: lib: strnlen_user: Add EVA support
In non-EVA mode, a strlen_user* alias is used for the
strlen_kernel* symbols since the code is identical. In EVA
mode, a new strlen_user* symbol is used which uses the EVA
specific instructions to load values from userspace.
Markos Chandras [Thu, 2 Jan 2014 16:19:49 +0000 (16:19 +0000)]
MIPS: lib: strnlen_user: Use macro to build the strnlen_user symbol
Build the __strnlen_user symbol using a macro. In EVA mode we will
need to use similar code to do the userspace load operations so
it is better if we use a macro to avoid code duplications.
Leonid Yegoshin [Wed, 4 Dec 2013 16:39:34 +0000 (16:39 +0000)]
MIPS: traps: Set correct address limit for breakpoints and traps
When a breakpoint or trap happens when operating in kernel mode but
on users behalf (eg syscall) it is necessary to change the address
limit to KERNEL_DS so any address checking can be bypassed and print
the correct stack trace.
Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com> Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Markos Chandras [Wed, 4 Dec 2013 13:56:03 +0000 (13:56 +0000)]
MIPS: asm: Add wrappers for EVA/non-EVA instructions
EVA uses specific instructions for accessing user memory.
Instead of polluting the kernel with numerous #ifdef CONFIG_EVA
we add wrappers for all the instructions that need special
handling when EVA is enabled.
James Hogan [Wed, 22 Jan 2014 16:19:40 +0000 (16:19 +0000)]
MIPS: Allow FTLB to be turned on for CPU_P5600
Allow FTLB to be turned on or off for CPU_P5600 as well as CPU_PROAPTIV.
The existing if statement is converted into a switch to allow for future
expansion.
Paul Burton [Thu, 13 Feb 2014 11:27:42 +0000 (11:27 +0000)]
MIPS: Save/restore MSA context around signals
This patch extends sigcontext in order to hold the most significant 64
bits of each vector register in addition to the MSA control & status
register. The least significant 64 bits are already saved as the scalar
FP context. This makes things a little awkward since the least & most
significant 64 bits of each vector register are not contiguous in
memory. Thus the copy_u & insert instructions are used to transfer the
values of the most significant 64 bits via GP registers.
Paul Burton [Tue, 28 Jan 2014 14:28:43 +0000 (14:28 +0000)]
MIPS: Warn if vector register partitioning is implemented
No current systems implementing MSA include support for vector register
partitioning which makes it somewhat difficult to implement support for
it in the kernel. Thus for the moment the kernel includes no such
support. However if the kernel were to be run on a system which
implemented register partitioning then it would not function correctly,
mishandling MSA disabled exceptions. Print a warning if run on a system
with vector register partitioning implemented to indicate this problem
should it occur.
projects / linux-beck.git / log