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Diffstat (limited to 'doc/arch/arm64.rst')
| -rw-r--r-- | doc/arch/arm64.rst | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/doc/arch/arm64.rst b/doc/arch/arm64.rst index 80498f6f6b8..7c0713504c4 100644 --- a/doc/arch/arm64.rst +++ b/doc/arch/arm64.rst @@ -18,7 +18,8 @@ Notes classical firmware (like initial hardware setup, CPU errata workarounds or SMP bringup). U-Boot can be entered in EL2 when its main purpose is that of a boot loader. It can drop to lower exception levels before - entering the OS. + entering the OS. For ARMv8-R it is recommened to enter at S-EL1, as for this + architecture there is no S-EL3. 2. U-Boot for arm64 is compiled with AArch64-gcc. AArch64-gcc use rela relocation format, a tool(tools/relocate-rela) by Scott Wood |