Unified codebase for TX28, TX48, TX51, TX53

[karo-tx-uboot.git] / README

diff --git a/README b/README
index 79016e690ace8899488e54ee7a35e1715018e9a2..6919392dca82c142ea00d9281393ddcde33ae981 100644 (file)
--- 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