commit ed2c4f4a44c8a84e25fc924ba807a14fd60caae6
author Manish Pandey <manish.pandey2@arm.com> Fri Nov 02 13:28:25 2018 +0000
committer Manish Pandey <manish.pandey2@arm.com> Mon Nov 05 17:11:03 2018 +0000
tree 65b05c0265c15d78cb2ac811113ad9a1cac4f2b3
parent dd756c98953fa76ff000e97c6207111015c1c8c6

plat/arm: Support direct Linux kernel boot in AArch32

This option allows the Trusted Firmware to directly jump to Linux
kernel for aarch32 without the need of an intermediate loader such
as U-Boot.

Similar to AArch64 ARM_LINUX_KERNEL_AS_BL33 only available with
RESET_TO_SP_MIN=1 as well as BL33 and DTB are preloaded in memory.

Change-Id: I908bc1633696be1caad0ce2f099c34215c8e0633
Signed-off-by: Manish Pandey <manish.pandey2@arm.com>

plat/arm/common/arm_common.mk

diff --git a/plat/arm/common/arm_common.mk b/plat/arm/common/arm_common.mk
index 23777fb..cb969b2 100644
--- a/plat/arm/common/arm_common.mk
+++ b/plat/arm/common/arm_common.mk
@@ -86,11 +86,14 @@
 $(eval $(call add_define,ARM_LINUX_KERNEL_AS_BL33))
 
 ifeq (${ARM_LINUX_KERNEL_AS_BL33},1)
-  ifneq (${ARCH},aarch64)
-    $(error "ARM_LINUX_KERNEL_AS_BL33 is only available in AArch64.")
-  endif
-  ifneq (${RESET_TO_BL31},1)
-    $(error "ARM_LINUX_KERNEL_AS_BL33 is only available if RESET_TO_BL31=1.")
+  ifeq (${ARCH},aarch64)
+    ifneq (${RESET_TO_BL31},1)
+      $(error "ARM_LINUX_KERNEL_AS_BL33 is only available if RESET_TO_BL31=1.")
+    endif
+  else
+    ifneq (${RESET_TO_SP_MIN},1)
+      $(error "ARM_LINUX_KERNEL_AS_BL33 is only available if RESET_TO_SP_MIN=1.")
+    endif
   endif
   ifndef PRELOADED_BL33_BASE
     $(error "PRELOADED_BL33_BASE must be set if ARM_LINUX_KERNEL_AS_BL33 is used.")