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ARM: uniphier: fix ROM boot mode for PH1-sLD3

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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>
This commit is contained in:
Masahiro Yamada 2016-08-10 16:08:40 +09:00
parent 0efbbc5c61
commit 82d075e79f
1 changed files with 5 additions and 0 deletions
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5
arch/arm/mach-uniphier/arm32/lowlevel_init.S
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@ -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