arm64: support running at addr other than linked to

[u-boot] / arch / arm / Kconfig

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 2607fedaed6f3ce59f91839893c77b7eab814136..94ad80568446819a65586282dec35b0c4ac3e459 100644 (file)
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -9,6 +9,22 @@ config ARM64
        select PHYS_64BIT
        select SYS_CACHE_SHIFT_6
 
+if ARM64
+config POSITION_INDEPENDENT
+       bool "Generate position-independent pre-relocation code"
+       help
+         U-Boot expects to be linked to a specific hard-coded address, and to
+         be loaded to and run from that address. This option lifts that
+         restriction, thus allowing the code to be loaded to and executed
+         from almost any address. This logic relies on the relocation
+         information that is embedded into the binary to support U-Boot
+         relocating itself to the top-of-RAM later during execution.
+endif
+
+config STATIC_RELA
+       bool
+       default y if ARM64 && !POSITION_INDEPENDENT
+
 config DMA_ADDR_T_64BIT
        bool
        default y if ARM64