PSCI: Add deprecated API for SPD when compatibility is disabled
This patch defines deprecated platform APIs to enable Trusted
Firmware components like Secure Payload and their dispatchers(SPD)
to continue to build and run when platform compatibility is disabled.
This decouples the migration of platform ports to the new platform API
from SPD and enables them to be migrated independently. The deprecated
platform APIs defined in this patch are : platform_get_core_pos(),
platform_get_stack() and platform_set_stack().
The patch also deprecates MPIDR based context management helpers like
cm_get_context_by_mpidr(), cm_set_context_by_mpidr() and cm_init_context().
A mechanism to deprecate APIs and identify callers of these APIs during
build is introduced, which is controlled by the build flag WARN_DEPRECATED.
If WARN_DEPRECATED is defined to 1, the users of the deprecated APIs will be
flagged either as a link error for assembly files or compile time warning
for C files during build.
Change-Id: Ib72c7d5dc956e1a74d2294a939205b200f055613
diff --git a/plat/common/aarch64/platform_mp_stack.S b/plat/common/aarch64/platform_mp_stack.S
index 6cfa069..c719019 100644
--- a/plat/common/aarch64/platform_mp_stack.S
+++ b/plat/common/aarch64/platform_mp_stack.S
@@ -42,8 +42,9 @@
#else
.weak plat_get_my_stack
.weak plat_set_my_stack
-#endif /*__ENABLE_PLAT_COMPAT__*/
-
+ .globl platform_get_stack
+ .globl platform_set_stack
+#endif /* __ENABLE_PLAT_COMPAT__ */
#if ENABLE_PLAT_COMPAT
/* ---------------------------------------------------------------------
@@ -108,6 +109,54 @@
endfunc platform_set_stack
#else
+ /* ---------------------------------------------------------------------
+ * When the compatility layer is disabled, the new platform APIs
+ * viz plat_get_my_stack() and plat_set_my_stack() are
+ * supported by the platform and the previous APIs platform_get_stack()
+ * and platform_set_stack() are defined in terms of new APIs making use
+ * of the fact that they are only ever invoked for the current CPU.
+ * This is to enable components of Trusted Firmware like SPDs using the
+ * old platform APIs to continue to work.
+ * --------------------------------------------------------------------
+ */
+
+ /* -------------------------------------------------------
+ * unsigned long platform_get_stack (unsigned long mpidr)
+ *
+ * For the current CPU, this function returns the stack
+ * pointer for a stack allocated in device memory. The
+ * 'mpidr' should correspond to that of the current CPU.
+ * This function is deprecated and plat_get_my_stack()
+ * should be used instead.
+ * -------------------------------------------------------
+ */
+func_deprecated platform_get_stack
+#if ASM_ASSERTION
+ mrs x1, mpidr_el1
+ cmp x0, x1
+ ASM_ASSERT(eq)
+#endif
+ b plat_get_my_stack
+endfunc_deprecated platform_get_stack
+
+ /* -----------------------------------------------------
+ * void platform_set_stack (unsigned long mpidr)
+ *
+ * For the current CPU, this function sets the stack pointer
+ * to a stack allocated in normal memory. The
+ * 'mpidr' should correspond to that of the current CPU.
+ * This function is deprecated and plat_get_my_stack()
+ * should be used instead.
+ * -----------------------------------------------------
+ */
+func_deprecated platform_set_stack
+#if ASM_ASSERTION
+ mrs x1, mpidr_el1
+ cmp x0, x1
+ ASM_ASSERT(eq)
+#endif
+ b plat_set_my_stack
+endfunc_deprecated platform_set_stack
/* -----------------------------------------------------
* unsigned long plat_get_my_stack ()