[PATCH] ARM: exynos: change the PHYSMEM_BITS and SECTION_SIZE

[Kukjin Kim]

Subash Patel wrote:
> 
> On exynos5440 there is DRAM on the 36-bit address range. Hence
> this patch converts the MAX_PHYSMEM_BITS macro to 36 if LPAE is
> enabled for the ARM architecture.
> 
> The conventional section size on exynos is 256M due to sparsemem.
> Since exynos5440 has memory in multiples of 1G in 32-bit and 36-bit
> range, this has now been modified to 31.
> 
> Signed-off-by: Subash Patel <subash.rp at samsung.com>
> ---
>  arch/arm/mach-exynos/include/mach/memory.h |    5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/arch/arm/mach-exynos/include/mach/memory.h
b/arch/arm/mach-exynos/include/mach/memory.h
> index 374ef2c..2a4cdb7 100644
> --- a/arch/arm/mach-exynos/include/mach/memory.h
> +++ b/arch/arm/mach-exynos/include/mach/memory.h
> @@ -15,8 +15,13 @@
> 
>  #define PLAT_PHYS_OFFSET		UL(0x40000000)
> 
> +#ifndef CONFIG_ARM_LPAE
>  /* Maximum of 256MiB in one bank */
>  #define MAX_PHYSMEM_BITS	32
>  #define SECTION_SIZE_BITS	28
> +#else
> +#define MAX_PHYSMEM_BITS	36
> +#define SECTION_SIZE_BITS	31
> +#endif
> 
>  #endif /* __ASM_ARCH_MEMORY_H */
> --
> 1.7.10.4

OK, current EXYNOS5440(SSDK5440 and SD5v1) cannot boot without this because
of enabling LPAE and bootargs for over 4GiB memory. So let me sort this out
for v3.11-rc.

Thanks,
- Kukjin