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-rw-r--r--README8
1 files changed, 8 insertions, 0 deletions
diff --git a/README b/README
index 79016e690ac..6919392dca8 100644
--- a/README
+++ b/README
@@ -432,6 +432,14 @@ The following options need to be configured:
Select high exception vectors of the ARM core, e.g., do not
clear the V bit of the c1 register of CP15.
+ CONFIG_SYS_THUMB_BUILD
+
+ Use this flag to build U-Boot using the Thumb instruction
+ set for ARM architectures. Thumb instruction set provides
+ better code density. For ARM architectures that support
+ Thumb2 this flag will result in Thumb2 code generated by
+ GCC.
+
- Linux Kernel Interface:
CONFIG_CLOCKS_IN_MHZ