From f8aa3f8d84af6e9ae0dce9c3577d342c6a013b14 Mon Sep 17 00:00:00 2001 From: Icenowy Zheng Date: Thu, 25 Oct 2018 17:23:06 +0800 Subject: [PATCH] sunxi: add Kconfig option for the maximum accessible DRAM Allwinner 64-bit SoCs can use 4GiB DRAM chip, however their memory map has only allocated 3GiB for DRAM, so only 3GiB of the DRAM is accessible. Add a Kconfig option for the maximum accessible DRAM. For A80 it should be a much higher value (8GiB), but as I have no A80 device to test and originally U-Boot only supports 2GiB DRAM on A80, it currently still falls under the 2GiB situation. Signed-off-by: Icenowy Zheng Reviewed-by: Andre Przywara Acked-by: Maxime Ripard Reviewed-by: Jagan Teki --- arch/arm/mach-sunxi/Kconfig | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig index 764337c643..6277abc3cc 100644 --- a/arch/arm/mach-sunxi/Kconfig +++ b/arch/arm/mach-sunxi/Kconfig @@ -140,6 +140,12 @@ config MACH_SUNXI_H3_H5 select SUNXI_GEN_SUN6I select SUPPORT_SPL +# TODO: try out A80's 8GiB DRAM space +config SUNXI_DRAM_MAX_SIZE + hex + default 0xC0000000 if MACH_SUN50I || MACH_SUN50I_H5 || MACH_SUN50I_H6 + default 0x80000000 + choice prompt "Sunxi SoC Variant" optional