Commit graph

7 commits

Author SHA1 Message Date
Masahiro Yamada
bcc51c1512 ARM: uniphier: move lowlevel debug init code after page table switch
As the sLD3 Boot ROM has a complex page table, it is difficult to
set up the debug UART with enabling it.  It will be much easier to
initialize the UART port after switching over to the straight-mapped
page table.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-08-11 17:49:20 +09:00
Masahiro Yamada
82d075e79f ARM: uniphier: fix ROM boot mode for PH1-sLD3
Commit 4b50369fb5 ("ARM: uniphier: create early page table at
run-time") broke the ROM boot mode for PH1-sLD3 SoC, because the
run-time page table creation requires the outer cache register
access but the page table in the sLD3 Boot ROM does not straight-map
virtual/physical addresses.

The idea here is to check the current page table to determine if
it is a straight map table.  If not, adjust the outer cache register
base.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-08-11 17:49:14 +09:00
Masahiro Yamada
0efbbc5c61 ARM: uniphier: refactor L2 zero-touching code in lowlevel_init
Here, the ldr pseudo-instruction falls into the ldr + data set.
The register access by [r1, #offset] produces shorter code.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-08-11 17:49:13 +09:00
Masahiro Yamada
4bab70a77d ARM: uniphier: rename outer-cache register macros
Sync register macros with Linux code.  This will be helpful to
develop the counterpart of Linux.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-07-24 00:17:15 +09:00
Masahiro Yamada
4cb9399e9b ARM: uniphier: fix typo "talbe"
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-06-30 23:49:26 +09:00
Hans de Goede
c09d29057a arm: Replace v7_maint_dcache_all(ARMV7_DCACHE_CLEAN_INVAL_ALL) with asm code
v7_maint_dcache_all() does not work reliable when build with gcc6,
see: https://bugzilla.redhat.com/show_bug.cgi?id=1318788

While debugging this I learned that v7_maint_dcache_all() is unreliable
when build with gcc5 too when it is marked as noinline.

This commit fixes the reliability issues by replacing the C-code with
the ready to use asm implementation from the kernel.

Given that this code when written as C-code clearly is quite fragile
(also see the existing comments about the C-code being the way it is
 to get optimal assembly) and that we have a proven asm alternative,
I believe that this is the best solution.

Note that we actually already had a copy of the kernel's
v7_flush_dcache_all() before this commit in
arch/arm/mach-uniphier/arm32/lowlevel_init.S.

This commit moves that code arch/arm/cpu/armv7/cache_v7_asm.S, renames
it to __v7_flush_dcache_all(), and adds a v7_flush_dcache_all() wrapper
which saves / restores the clobbered registers for use from C-code.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-04-11 20:48:26 -04:00
Masahiro Yamada
fe5ea57bdb ARM: uniphier: prepare directory structure for ARMv8 SoC support
Before adding ARMv8 support, this commit refactors the directory
structure.  Move ARMv7 specific files to arch/arm/mach-uniphier/arm32
to avoid a mess by mixture of ARMv7 and ARMv8 code.  Also move the
"select CPU_V7" to the lower-level menu because we will have to
select ARM64 instead of CPU_V7 for ARMv8 SoCs.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-03-01 00:33:24 +09:00
Renamed from arch/arm/mach-uniphier/lowlevel_init.S (Browse further)