SPM: Use Main Stack for initialization
On reset, the Main Stack is used by default.
TF-M changes the stack to Processor Stack.
This patch remove the change to PSP in startup.s and:
- Rename the ARM_LIB_STACK to ER_INITIAL_PSP
- Rename the ARM_LIB_STACK_MSP to ARM_LIB_STACK
The renaming is to align the __main function of ARMClang where the
ARM_LIB_STACK is set to the current SP (MSP)
For Library Mode, the stacks are set to back to use PSP before entering
c code to avoid massive corresponding changes.
For FF-M implementations, this patch also:
- Seal the Main Stack before entering c code
- Manually free the Main Stack usage after initialization as the init
function does not return
Change-Id: Ie1b6f2fca1f774c4812a89fa45bb039b16fe5af0
Signed-off-by: Kevin Peng <kevin.peng@arm.com>
Co-authored-by: Summer Qin <summer.qin@arm.com>
diff --git a/secure_fw/spm/include/utilities.h b/secure_fw/spm/include/utilities.h
index f527071..aec3ea0 100644
--- a/secure_fw/spm/include/utilities.h
+++ b/secure_fw/spm/include/utilities.h
@@ -37,4 +37,8 @@
/* FixMe: Replace ERROR_MSG() in platform code with a suitable API */
#define ERROR_MSG(msg) SPMLOG_ERRMSG(msg "\r\n")
+/* Preprocessor to reference C MACRO to string in inline asm */
+#define M2S_HELPER(x) #x
+#define M2S(m) M2S_HELPER(m)
+
#endif /* __TFM_UTILS_H__ */