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authorMasahiro Yamada <yamada.masahiro@socionext.com>2016-08-10 16:08:40 +0900
committerMasahiro Yamada <yamada.masahiro@socionext.com>2016-08-11 17:49:14 +0900
commit82d075e79fa509ffb8ecd8dd2dc216929d6e8289 (patch)
tree0c503edf511c583c91d3fd2acacc6bd85ee76187 /arch/arm/mach-uniphier/arm32
parent0efbbc5c613b28614eb3323145b5d3eda4a33188 (diff)
ARM: uniphier: fix ROM boot mode for PH1-sLD3
Commit 4b50369fb535 ("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>
Diffstat (limited to 'arch/arm/mach-uniphier/arm32')
-rw-r--r--arch/arm/mach-uniphier/arm32/lowlevel_init.S5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm/mach-uniphier/arm32/lowlevel_init.S b/arch/arm/mach-uniphier/arm32/lowlevel_init.S
index 2be95058b3..b0c94ad01e 100644
--- a/arch/arm/mach-uniphier/arm32/lowlevel_init.S
+++ b/arch/arm/mach-uniphier/arm32/lowlevel_init.S
@@ -99,6 +99,11 @@ ENDPROC(enable_mmu)
ENTRY(setup_init_ram)
ldr r1, = SSCO_BASE
+ mrc p15, 0, r0, c2, c0, 0 @ TTBR0
+ ldr r0, [r0, #0x400] @ entry for virtual address 0x100*****
+ bfc r0, #0, #20
+ cmp r0, #0x50000000 @ is sLD3 page table?
+ biceq r1, r1, #0xc0000000 @ sLD3 ROM maps 0x5******* to 0x1*******
/* Touch to zero for the boot way */
0: ldr r0, = 0x00408006 @ touch to zero with address range