PSCI: Migrate ARM reference platforms to new platform API
This patch migrates ARM reference platforms, Juno and FVP, to the new platform
API mandated by the new PSCI power domain topology and composite power state
frameworks. The platform specific makefiles now exports the build flag
ENABLE_PLAT_COMPAT=0 to disable the platform compatibility layer.
Change-Id: I3040ed7cce446fc66facaee9c67cb54a8cd7ca29
diff --git a/plat/arm/common/aarch64/arm_helpers.S b/plat/arm/common/aarch64/arm_helpers.S
index 25b67f3..daf08fa 100644
--- a/plat/arm/common/aarch64/arm_helpers.S
+++ b/plat/arm/common/aarch64/arm_helpers.S
@@ -30,11 +30,37 @@
#include <asm_macros.S>
#include <platform_def.h>
-
+ .weak plat_arm_calc_core_pos
+ .weak plat_my_core_pos
.globl plat_crash_console_init
.globl plat_crash_console_putc
+ /* -----------------------------------------------------
+ * unsigned int plat_my_core_pos(void)
+ * This function uses the plat_arm_calc_core_pos()
+ * definition to get the index of the calling CPU.
+ * -----------------------------------------------------
+ */
+func plat_my_core_pos
+ mrs x0, mpidr_el1
+ b plat_arm_calc_core_pos
+endfunc plat_my_core_pos
+
+ /* -----------------------------------------------------
+ * unsigned int plat_arm_calc_core_pos(uint64_t mpidr)
+ * Helper function to calculate the core position.
+ * With this function: CorePos = (ClusterId * 4) +
+ * CoreId
+ * -----------------------------------------------------
+ */
+func plat_arm_calc_core_pos
+ and x1, x0, #MPIDR_CPU_MASK
+ and x0, x0, #MPIDR_CLUSTER_MASK
+ add x0, x1, x0, LSR #6
+ ret
+endfunc plat_arm_calc_core_pos
+
/* ---------------------------------------------
* int plat_crash_console_init(void)
* Function to initialize the crash console