AArch32: Add essential ARM platform and FVP support
This patch adds AArch32 support for FVP and implements common platform APIs
like `plat_get_my_stack`, `plat_set_my_stack`, `plat_my_core_cos` for AArch32.
Only Multi Processor(MP) implementations of these functions are considered in
this patch. The ARM Standard platform layer helpers are implemented for
AArch32 and the common makefiles are modified to cater for both AArch64 and
AArch32 builds. Compatibility with the deprecated platform API is not
supported for AArch32.
Change-Id: Iad228400613eec91abf731b49e21a15bcf2833ea
diff --git a/plat/arm/common/arm_common.c b/plat/arm/common/arm_common.c
index 93355fe..c53723d 100644
--- a/plat/arm/common/arm_common.c
+++ b/plat/arm/common/arm_common.c
@@ -134,6 +134,7 @@
/*******************************************************************************
* Gets SPSR for BL33 entry
******************************************************************************/
+#ifndef AARCH32
uint32_t arm_get_spsr_for_bl33_entry(void)
{
unsigned long el_status;
@@ -154,6 +155,28 @@
spsr = SPSR_64(mode, MODE_SP_ELX, DISABLE_ALL_EXCEPTIONS);
return spsr;
}
+#else
+/*******************************************************************************
+ * Gets SPSR for BL33 entry
+ ******************************************************************************/
+uint32_t arm_get_spsr_for_bl33_entry(void)
+{
+ unsigned int hyp_status, mode, spsr;
+
+ hyp_status = GET_VIRT_EXT(read_id_pfr1());
+
+ mode = (hyp_status) ? MODE32_hyp : MODE32_svc;
+
+ /*
+ * TODO: Consider the possibility of specifying the SPSR in
+ * the FIP ToC and allowing the platform to have a say as
+ * well.
+ */
+ spsr = SPSR_MODE32(mode, plat_get_ns_image_entrypoint() & 0x1,
+ SPSR_E_LITTLE, DISABLE_ALL_EXCEPTIONS);
+ return spsr;
+}
+#endif /* AARCH32 */
/*******************************************************************************
* Configures access to the system counter timer module.