imx233: add capability to boot OF or updater instead of Rockbox

This commit adds the necessary code in the dualboot stub (bootloader) to
let rockbox control the boot process. In particular, rockbox can now choose
if the next boot will be normal (boot rockbox or OF on magic key), to OF
or to updater.

The intents (to be added in follow-up commits) are:
1) Let the user more easily reboot to the OF. On some targets it is not trivial,
especially in USB mode.
2) Automatically reboot to updater when the user drop firmware.sb at the root
of the drive (currently, the user needs to do that in OF USB mode)
3) Document this OF magic

Change-Id: I86df651dec048c318c6a22de74abb8c6b41aa9ad

1 files changed, 2 insertions, 2 deletions

diff --git a/rbutil/mkimxboot/dualboot/Makefile b/rbutil/mkimxboot/dualboot/Makefile
index 7abd381b2d..b80233226a 100644
--- a/rbutil/mkimxboot/dualboot/Makefile
+++ b/rbutil/mkimxboot/dualboot/Makefile
@@ -2,8 +2,8 @@ CC=gcc
 LD=ld
 OC=objcopy
 PREFIX?=arm-elf-eabi-
-REGS_PATH=../../../firmware/target/arm/imx233/regs
-CFLAGS=-mcpu=arm926ej-s -std=gnu99 -I. -I$(REGS_PATH) -nostdlib -ffreestanding -fomit-frame-pointer -O
+IMX233_PATH=../../../firmware/target/arm/imx233
+CFLAGS=-mcpu=arm926ej-s -std=gnu99 -I. -I$(IMX233_PATH) -nostdlib -ffreestanding -fomit-frame-pointer -O
 # Edit the following variables when adding a new target.
 # mkimxboot.c also needs to be edited to refer to these
 # To add a new target x you need to: