diff options
Diffstat (limited to 'board/sunxi')
| -rw-r--r-- | board/sunxi/Kconfig | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/board/sunxi/Kconfig b/board/sunxi/Kconfig index 0cd57a2d85..f020573865 100644 --- a/board/sunxi/Kconfig +++ b/board/sunxi/Kconfig @@ -142,6 +142,20 @@ config RESERVE_ALLWINNER_BOOT0_HEADER blob relies on this information to load and execute U-Boot. Only needed on 64-bit Allwinner boards so far when using boot0. +config ARM_BOOT_HOOK_RMR + bool + depends on ARM64 + default y + select ENABLE_ARM_SOC_BOOT0_HOOK + ---help--- + Insert some ARM32 code at the very beginning of the U-Boot binary + which uses an RMR register write to bring the core into AArch64 mode. + The very first instruction acts as a switch, since it's carefully + chosen to be a NOP in one mode and a branch in the other, so the + code would only be executed if not already in AArch64. + This allows both the SPL and the U-Boot proper to be entered in + either mode and switch to AArch64 if needed. + config DRAM_TYPE int "sunxi dram type" depends on MACH_SUN8I_A83T |