AArch32: Common changes needed for BL1/BL2
This patch adds common changes to support AArch32 state in
BL1 and BL2. Following are the changes:
* Added functions for disabling MMU from Secure state.
* Added AArch32 specific SMC function.
* Added semihosting support.
* Added reporting of unhandled exceptions.
* Added uniprocessor stack support.
* Added `el3_entrypoint_common` macro that can be
shared by BL1 and BL32 (SP_MIN) BL stages. The
`el3_entrypoint_common` is similar to the AArch64
counterpart with the main difference in the assembly
instructions and the registers that are relevant to
AArch32 execution state.
* Enabled `LOAD_IMAGE_V2` flag in Makefile for
`ARCH=aarch32` and added check to make sure that
platform has not overridden to disable it.
Change-Id: I33c6d8dfefb2e5d142fdfd06a0f4a7332962e1a3
diff --git a/common/aarch32/debug.S b/common/aarch32/debug.S
index 01ec1e3..6be6951 100644
--- a/common/aarch32/debug.S
+++ b/common/aarch32/debug.S
@@ -32,6 +32,7 @@
#include <asm_macros.S>
.globl do_panic
+ .globl report_exception
/***********************************************************
* The common implementation of do_panic for all BL stages
@@ -40,3 +41,14 @@
b plat_panic_handler
endfunc do_panic
+ /***********************************************************
+ * This function is called from the vector table for
+ * unhandled exceptions. It reads the current mode and
+ * passes it to platform.
+ ***********************************************************/
+func report_exception
+ mrs r0, cpsr
+ and r0, #MODE32_MASK
+ bl plat_report_exception
+ bl plat_panic_handler
+endfunc report_exception