Introduce SCP power management abstraction
This patch introduces an additional layer of abstraction between
CSS power management hooks and the SCPI driver. A new set of APIs
are introduced in order to abstract out power management operations
from underlying communication mechanism with the SCP.
The SCPI and the associated MHU drivers are moved into a `drivers`
folder in CSS. The new SCP communication abstraction layer is added
in the `drivers/scp` folder. The existing CSS power management
uses the new APIs to reflect this abstraction.
Change-Id: I7d775129fc0558e9703c2724523fb8f0a916838c
Signed-off-by: Soby Mathew <soby.mathew@arm.com>
diff --git a/include/plat/arm/css/common/css_pm.h b/include/plat/arm/css/common/css_pm.h
index 4a6ca81..489275e 100644
--- a/include/plat/arm/css/common/css_pm.h
+++ b/include/plat/arm/css/common/css_pm.h
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2016, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
@@ -35,6 +35,12 @@
#include <psci.h>
#include <types.h>
+/* Macros to read the CSS power domain state */
+#define CSS_CORE_PWR_STATE(state) (state)->pwr_domain_state[ARM_PWR_LVL0]
+#define CSS_CLUSTER_PWR_STATE(state) (state)->pwr_domain_state[ARM_PWR_LVL1]
+#define CSS_SYSTEM_PWR_STATE(state) ((PLAT_MAX_PWR_LVL > ARM_PWR_LVL1) ?\
+ (state)->pwr_domain_state[ARM_PWR_LVL2] : 0)
+
int css_pwr_domain_on(u_register_t mpidr);
void css_pwr_domain_on_finish(const psci_power_state_t *target_state);
void css_pwr_domain_off(const psci_power_state_t *target_state);