Currently the debugfs interface to print the segment configuration
refuses to print the physical address of mapped segments. However if the
EU bit is set these become unmapped at error level (when
CP0_Status.ERL=1), so the physical address is still relevant.
Update the logic to print the physical address of mapped segments when
the EU bit is set, while still hiding the Cache Coherency Attribute
(since EU overrides that to uncached when ERL=1 too).
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13833/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
We have many extern declarations of mips_debugfs_dir through arch/mips/
in various C files. Unify them by declaring mips_debugfs_dir in a
header, including it in each affected C file & removing the duplicate
declarations.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Cc: Maciej W. Rozycki <macro@linux-mips.org>
Cc: linux-kernel@vger.kernel.org
Cc: Joe Perches <joe@perches.com>
Cc: Jaedon Shin <jaedon.shin@gmail.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: David Daney <david.daney@cavium.com>
Cc: Zubair Lutfullah Kakakhel <Zubair.Kakakhel@imgtec.com>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Cc: James Cowgill <James.Cowgill@imgtec.com>
Patchwork: https://patchwork.linux-mips.org/patch/11181/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Add a new mips/segments debugfs file to print the 6 segmentation
control registers for supported cores. A sample from a proAptiv core
is given below:
Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/6137/
Segment Virtual Size Access Mode Physical Caching EU
------- ------- ---- ----------- -------- ------- --
0 e0000000 512M MK UND U 0
1 c0000000 512M MSK UND U 0
2 a0000000 512M UK 000 2 0
3 80000000 512M UK 000 3 0
4 40000000 1G MUSK UND U 1
5 00000000 1G MUSK UND U 1
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Steven J. Hill <Steven.Hill@imgtec.com>
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
James Hogan
Paul Burton
Steven J. Hill