[PATCH v2 7/7] arm: mediatek: add CONFIG_MTK_MEM_MAP_DDR_BASE_PHY

[Macpaul Lin (林智斌)]

On Mon, 2026-02-09 at 10:39 -0600, David Lechner wrote:
> Add a CONFIG_MTK_MEM_MAP_DDR_BASE_PHY variable to specify the DDR
> base
> physical address for the Mediatek ARMv8 memory map. This will be used
> by MT8196 in the future which has a different DDR base address than
> other Mediatek SoCs.
> 
> Signed-off-by: David Lechner <dlechner at baylibre.com>
> ---
> v2 changes: new patch in v2
> ---
>  arch/arm/mach-mediatek/Kconfig         | 6 ++++++
>  arch/arm/mach-mediatek/armv8-mem-map.c | 4 ++--
>  2 files changed, 8 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm/mach-mediatek/Kconfig b/arch/arm/mach-
> mediatek/Kconfig
> index 33717a1864f..d10aedc303b 100644
> --- a/arch/arm/mach-mediatek/Kconfig
> +++ b/arch/arm/mach-mediatek/Kconfig
> @@ -132,6 +132,12 @@ endchoice
>  
>  if ARM64
>  
> +config MTK_MEM_MAP_DDR_BASE_PHY
> +	hex "DDR physical base address"
> +	default 0x40000000
> +	help
> +		Target-specific DDR physical base address.
> +
>  config MTK_MEM_MAP_DDR_SIZE
>  	hex "DDR .size in mem_map"
>  	default 0x200000000 if TARGET_MT7987 || TARGET_MT7988 ||
> TARGET_MT8188
> diff --git a/arch/arm/mach-mediatek/armv8-mem-map.c b/arch/arm/mach-
> mediatek/armv8-mem-map.c
> index 3587a2a9dd2..cbaa9b4c267 100644
> --- a/arch/arm/mach-mediatek/armv8-mem-map.c
> +++ b/arch/arm/mach-mediatek/armv8-mem-map.c
> @@ -5,8 +5,8 @@
>  static struct mm_region mediatek_mem_map[] = {
>  	{
>  		/* DDR */
> -		.virt = 0x40000000UL,
> -		.phys = 0x40000000UL,
> +		.virt = CONFIG_MTK_MEM_MAP_DDR_BASE_PHY,
> +		.phys = CONFIG_MTK_MEM_MAP_DDR_BASE_PHY,
>  		.size = CONFIG_MTK_MEM_MAP_DDR_SIZE,
>  		.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
> PTE_BLOCK_OUTER_SHARE,
>  	}, {
> 

Reviewed-by: Macpaul Lin <macpaul.lin at mediatek.com>

Thanks!
Macpaul Lin