Commit graph

15 commits

Author SHA1 Message Date
Matt Redfearn 5e7c1c918a MIPS: Introduce plat_get_fdt a platform API to retrieve the FDT
Early access to the kernel command line requires early access to the FDT
for platforms which pass the command line within the device tree. There
was no common way to retrieve the location of the FDT without incurring
side effects, such as plat_mem_setup which, on Malta at least,
initializes a bunch of other stuff.

This patch adds plat_get_ftd() for IMG platforms.

Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: kernel-hardening@lists.openwall.com
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/12988/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2016-05-13 14:02:03 +02:00
Paul Burton e81a8c7dab MIPS: Malta: Setup RAM regions via DT
Move memory configuration to be performed via device tree for the Malta
board. This moves more Malta specific code to malta-dtshim.c, leaving
the rest of the mti-malta code a little more board-agnostic. This will
be useful to share more code between boards, with the device tree
providing the board specifics as intended.

Since we can't rely upon Malta boards running a bootloader capable of
handling devictrees & filling in the required information, a piece of
shim code (malta_dt_shim) is added to consume the (e)memsize variables
provided as part of the bootloader environment (or on the kernel command
line) then generate the DT memory node using the provided values.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Cc: Kumar Gala <galak@codeaurora.org>
Cc: linux-kernel@vger.kernel.org
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Patchwork: https://patchwork.linux-mips.org/patch/11222/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-11-11 08:35:47 +01:00
Paul Burton e8823d26b4 MIPS: Malta: Basic DT plumbing
Build a DT for the Malta platform into the kernel, load it & probe
devices from it. The DT is essentially empty at this point, devices
will be added in further patches.

[ralf@linux-mips.org: Fixed conflicts.]

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Andrew Bresticker <abrestic@chromium.org>
Cc: linux-kernel@vger.kernel.org
Cc: Markos Chandras <markos.chandras@imgtec.com>
Patchwork: http://patchwork.linux-mips.org/patch/10119/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-06-21 21:54:29 +02:00
Ralf Baechle b633648c5a MIPS: MT: Remove SMTC support
Nobody is maintaining SMTC anymore and there also seems to be no userbase.
Which is a pity - the SMTC technology primarily developed by Kevin D.
Kissell <kevink@paralogos.com> is an ingenious demonstration for the MT
ASE's power and elegance.

Based on Markos Chandras <Markos.Chandras@imgtec.com> patch
https://patchwork.linux-mips.org/patch/6719/ which while very similar did
no longer apply cleanly when I tried to merge it plus some additional
post-SMTC cleanup - SMTC was a feature as tricky to remove as it was to
merge once upon a time.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-05-24 00:07:01 +02:00
Ralf Baechle a9dde2886b MIPS: Malta: Fix CONFIG_BLK_DEV_IDE vestiges.
Don't depend on CONFIG_IDE to make this more robust.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-03-31 18:17:12 +02:00
Markos Chandras f8b7faf17b 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:

Virtual memory           Physical memory           Mapping
0x00000000 - 0x7fffffff  0x80000000 - 0xfffffffff   MUSUK (kuseg)
0x80000000 - 0x9fffffff  0x00000000 - 0x1ffffffff   MUSUK (kseg0)
0xa0000000 - 0xbf000000  0x00000000 - 0x1ffffffff   MUSUK (kseg1)
0xc0000000 - 0xdfffffff             -                 MK  (kseg2)
0xe0000000 - 0xffffffff             -                 MK  (kseg3)

The location of exception vectors remain the same since 0xbfc00000
(traditional exception base) still maps to 0x1fc00000 physical.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
2014-03-26 23:09:19 +01:00
Paul Burton 237036de65 MIPS: Malta: Make use of generic CM support
Remove the Malta-specific CM probe code and instead make use of the
newly added generic CM code.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6364/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-03-26 23:09:06 +01:00
Steven J. Hill 49bffbdc88 MIPS: FW: malta: Code formatting clean-ups.
Clean-up code according to the 'checkpatch.pl' script.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
2013-05-08 12:30:10 +02:00
Steven J. Hill b431f09d55 MIPS: FW: malta: Use new common FW library variable processing.
Remove old YAMON prom code and use common firmware library code.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
2013-05-08 12:30:09 +02:00
Steven J. Hill b6d92b4a6b MIPS: Add option to disable software I/O coherency.
Some MIPS controllers have hardware I/O coherency. This patch
detects those and turns off software coherency. A new kernel
command line option also allows the user to manually turn
software coherency on or off.

Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
2013-05-01 16:32:49 -05:00
Ralf Baechle 7034228792 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 <ralf@linux-mips.org>
2013-02-01 10:00:22 +01:00
Uwe Kleine-König 4a043d79dc mips: mark const init data with __initconst instead of __initdata
As long as there is no other non-const variable marked __initdata in the
same compilation unit it doesn't hurt. If there were one however
compilation would fail with

	error: $variablename causes a section type conflict

because a section containing const variables is marked read only and so
cannot contain non-const variables.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: linux-mips@linux-mips.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: kernel@pengutronix.de
Patchwork: https://patchwork.linux-mips.org/patch/3565/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2012-07-19 11:23:43 +02:00
Ralf Baechle 1f320d053c MIPS: Malta: Convert reset initialization to initcall.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2009-09-17 20:07:43 +02:00
Jason Wessel 8d60a903d9 [MIPS] kgdb: Remove existing implementation
This patch explicitly removes the kgdb implementation, for mips which
is intended to be followed by a patch that adds a kgdb implementation
for MIPS that makes use of the kgdb core in the kernel.

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-07-30 21:54:42 +01:00
Ralf Baechle 315806cb19 [MIPS] Malta: Cleanup organization of code into directories.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2008-07-15 18:44:34 +01:00
Renamed from arch/mips/mips-boards/malta/malta_setup.c (Browse further)