allwinner: Add functions to control CPU power/reset
sun50i_cpu_on will be used by the PSCI implementation to initialize
secondary cores for SMP. Unfortunately, sun50i_cpu_off is not usable by
PSCI directly, because it is not possible for a CPU to use this function
to power itself down. Power cannot be shut off until the outputs are
clamped, and MMIO does not work once the outputs are clamped.
But at least CPU0 can shutdown the other cores early in the BL31 boot
process and before shutting down the system.
Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/plat/allwinner/common/sunxi_private.h b/plat/allwinner/common/sunxi_private.h
index 34e5639..bd923f4 100644
--- a/plat/allwinner/common/sunxi_private.h
+++ b/plat/allwinner/common/sunxi_private.h
@@ -8,5 +8,8 @@
#define __SUNXI_PRIVATE_H__
void sunxi_configure_mmu_el3(int flags);
+void sunxi_cpu_off(unsigned int cluster, unsigned int core);
+void sunxi_cpu_on(unsigned int cluster, unsigned int core);
+void sunxi_disable_secondary_cpus(unsigned int primary_cpu);
#endif /* __SUNXI_PRIVATE_H__ */