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 ---
arch/arm/mach-uniphier/arm32/lowlevel_init.S | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/arch/arm/mach-uniphier/arm32/lowlevel_init.S b/arch/arm/mach-uniphier/arm32/lowlevel_init.S index 2be9505..b0c94ad 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