u-boot/doc/README.arm64

1 U-Boot for arm64
5 The initial arm64 U-Boot port was developed before hardware was available,
7 These days U-Boot runs on a variety of 64-bit capable ARM hardware, from
13 1. U-Boot can run at any exception level it is entered in, it is
14    recommened to enter it in EL3 if U-Boot takes some responsibilities of a
16    or SMP bringup). U-Boot can be entered in EL2 when its main purpose is
20 2. U-Boot for arm64 is compiled with AArch64-gcc. AArch64-gcc
21    use rela relocation format, a tool(tools/relocate-rela) by Scott Wood
22    is used to encode the initial addend of rela to u-boot.bin. After running,
23    the U-Boot will be relocated to destination again.
32 4. Spin-table is used to wake up secondary processors. One location