include/plat/arm/common/plat_arm.h - filogic/atf - Gitiles

 /*
  * Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
 #ifndef PLAT_ARM_H
 #define PLAT_ARM_H

 #include <stdint.h>

 #include <drivers/arm/tzc_common.h>
 #include <lib/bakery_lock.h>
 #include <lib/cassert.h>
 #include <lib/el3_runtime/cpu_data.h>
 #include <lib/spinlock.h>
 #include <lib/utils_def.h>
 #include <lib/xlat_tables/xlat_tables_compat.h>

 /*******************************************************************************
  * Forward declarations
  ******************************************************************************/
 struct meminfo;
 struct image_info;
 struct bl_params;

 typedef struct arm_tzc_regions_info {
 	unsigned long long base;
 	unsigned long long end;
 	unsigned int sec_attr;
 	unsigned int nsaid_permissions;
 } arm_tzc_regions_info_t;

 /*******************************************************************************
  * Default mapping definition of the TrustZone Controller for ARM standard
  * platforms.
  * Configure:
  *   - Region 0 with no access;
  *   - Region 1 with secure access only;
  *   - the remaining DRAM regions access from the given Non-Secure masters.
  ******************************************************************************/
 #if ENABLE_SPM && SPM_MM
 #define ARM_TZC_REGIONS_DEF						\
 	{ARM_AP_TZC_DRAM1_BASE, ARM_EL3_TZC_DRAM1_END,			\
 		TZC_REGION_S_RDWR, 0},					\
 	{ARM_NS_DRAM1_BASE, ARM_NS_DRAM1_END, ARM_TZC_NS_DRAM_S_ACCESS, \
 		PLAT_ARM_TZC_NS_DEV_ACCESS}, 				\
 	{ARM_DRAM2_BASE, ARM_DRAM2_END, ARM_TZC_NS_DRAM_S_ACCESS,	\
 		PLAT_ARM_TZC_NS_DEV_ACCESS},				\
 	{PLAT_SP_IMAGE_NS_BUF_BASE, (PLAT_SP_IMAGE_NS_BUF_BASE +	\
 		PLAT_SP_IMAGE_NS_BUF_SIZE) - 1, TZC_REGION_S_NONE,	\
 		PLAT_ARM_TZC_NS_DEV_ACCESS}

 #else
 #define ARM_TZC_REGIONS_DEF						\
 	{ARM_AP_TZC_DRAM1_BASE, ARM_EL3_TZC_DRAM1_END,			\
 		TZC_REGION_S_RDWR, 0},					\
 	{ARM_NS_DRAM1_BASE, ARM_NS_DRAM1_END, ARM_TZC_NS_DRAM_S_ACCESS, \
 		PLAT_ARM_TZC_NS_DEV_ACCESS},	 			\
 	{ARM_DRAM2_BASE, ARM_DRAM2_END, ARM_TZC_NS_DRAM_S_ACCESS,	\
 		PLAT_ARM_TZC_NS_DEV_ACCESS}
 #endif

 #define ARM_CASSERT_MMAP						  \
 	CASSERT((ARRAY_SIZE(plat_arm_mmap) - 1) <= PLAT_ARM_MMAP_ENTRIES, \
 		assert_plat_arm_mmap_mismatch);				  \
 	CASSERT((PLAT_ARM_MMAP_ENTRIES + ARM_BL_REGIONS)		  \
 		<= MAX_MMAP_REGIONS,					  \
 		assert_max_mmap_regions);

 void arm_setup_romlib(void);

 #if defined(IMAGE_BL31) || (!defined(__aarch64__) && defined(IMAGE_BL32))
 /*
  * Use this macro to instantiate lock before it is used in below
  * arm_lock_xxx() macros
  */
 #define ARM_INSTANTIATE_LOCK	static DEFINE_BAKERY_LOCK(arm_lock)
 #define ARM_LOCK_GET_INSTANCE	(&arm_lock)

 #if !HW_ASSISTED_COHERENCY
 #define ARM_SCMI_INSTANTIATE_LOCK	DEFINE_BAKERY_LOCK(arm_scmi_lock)
 #else
 #define ARM_SCMI_INSTANTIATE_LOCK	spinlock_t arm_scmi_lock
 #endif
 #define ARM_SCMI_LOCK_GET_INSTANCE	(&arm_scmi_lock)

 /*
  * These are wrapper macros to the Coherent Memory Bakery Lock API.
  */
 #define arm_lock_init()		bakery_lock_init(&arm_lock)
 #define arm_lock_get()		bakery_lock_get(&arm_lock)
 #define arm_lock_release()	bakery_lock_release(&arm_lock)

 #else

 /*
  * Empty macros for all other BL stages other than BL31 and BL32
  */
 #define ARM_INSTANTIATE_LOCK	static int arm_lock __unused
 #define ARM_LOCK_GET_INSTANCE	0
 #define arm_lock_init()
 #define arm_lock_get()
 #define arm_lock_release()

 #endif /* defined(IMAGE_BL31) || (!defined(__aarch64__) && defined(IMAGE_BL32)) */

 #if ARM_RECOM_STATE_ID_ENC
 /*
  * Macros used to parse state information from State-ID if it is using the
  * recommended encoding for State-ID.
  */
 #define ARM_LOCAL_PSTATE_WIDTH		4
 #define ARM_LOCAL_PSTATE_MASK		((1 << ARM_LOCAL_PSTATE_WIDTH) - 1)

 /* Macros to construct the composite power state */

 /* Make composite power state parameter till power level 0 */
 #if PSCI_EXTENDED_STATE_ID

 #define arm_make_pwrstate_lvl0(lvl0_state, pwr_lvl, type) \
 		(((lvl0_state) << PSTATE_ID_SHIFT) | ((type) << PSTATE_TYPE_SHIFT))
 #else
 #define arm_make_pwrstate_lvl0(lvl0_state, pwr_lvl, type) \
 		(((lvl0_state) << PSTATE_ID_SHIFT) | \
 		((pwr_lvl) << PSTATE_PWR_LVL_SHIFT) | \
 		((type) << PSTATE_TYPE_SHIFT))
 #endif /* __PSCI_EXTENDED_STATE_ID__ */

 /* Make composite power state parameter till power level 1 */
 #define arm_make_pwrstate_lvl1(lvl1_state, lvl0_state, pwr_lvl, type) \
 		(((lvl1_state) << ARM_LOCAL_PSTATE_WIDTH) | \
 		arm_make_pwrstate_lvl0(lvl0_state, pwr_lvl, type))

 /* Make composite power state parameter till power level 2 */
 #define arm_make_pwrstate_lvl2(lvl2_state, lvl1_state, lvl0_state, pwr_lvl, type) \
 		(((lvl2_state) << (ARM_LOCAL_PSTATE_WIDTH * 2)) | \
 		arm_make_pwrstate_lvl1(lvl1_state, lvl0_state, pwr_lvl, type))

 #endif /* __ARM_RECOM_STATE_ID_ENC__ */

 /* ARM State switch error codes */
 #define STATE_SW_E_PARAM		(-2)
 #define STATE_SW_E_DENIED		(-3)

 /* IO storage utility functions */
 void arm_io_setup(void);

 /* Security utility functions */
 void arm_tzc400_setup(const arm_tzc_regions_info_t *tzc_regions);
 struct tzc_dmc500_driver_data;
 void arm_tzc_dmc500_setup(struct tzc_dmc500_driver_data *plat_driver_data,
 			const arm_tzc_regions_info_t *tzc_regions);

 /* Console utility functions */
 void arm_console_boot_init(void);
 void arm_console_boot_end(void);
 void arm_console_runtime_init(void);
 void arm_console_runtime_end(void);

 /* Systimer utility function */
 void arm_configure_sys_timer(void);

 /* PM utility functions */
 int arm_validate_power_state(unsigned int power_state,
 			    psci_power_state_t *req_state);
 int arm_validate_psci_entrypoint(uintptr_t entrypoint);
 int arm_validate_ns_entrypoint(uintptr_t entrypoint);
 void arm_system_pwr_domain_save(void);
 void arm_system_pwr_domain_resume(void);
 int arm_psci_read_mem_protect(int *enabled);
 int arm_nor_psci_write_mem_protect(int val);
 void arm_nor_psci_do_static_mem_protect(void);
 void arm_nor_psci_do_dyn_mem_protect(void);
 int arm_psci_mem_protect_chk(uintptr_t base, u_register_t length);

 /* Topology utility function */
 int arm_check_mpidr(u_register_t mpidr);

 /* BL1 utility functions */
 void arm_bl1_early_platform_setup(void);
 void arm_bl1_platform_setup(void);
 void arm_bl1_plat_arch_setup(void);

 /* BL2 utility functions */
 void arm_bl2_early_platform_setup(uintptr_t tb_fw_config, struct meminfo *mem_layout);
 void arm_bl2_platform_setup(void);
 void arm_bl2_plat_arch_setup(void);
 uint32_t arm_get_spsr_for_bl32_entry(void);
 uint32_t arm_get_spsr_for_bl33_entry(void);
 int arm_bl2_plat_handle_post_image_load(unsigned int image_id);
 int arm_bl2_handle_post_image_load(unsigned int image_id);
 struct bl_params *arm_get_next_bl_params(void);

 /* BL2 at EL3 functions */
 void arm_bl2_el3_early_platform_setup(void);
 void arm_bl2_el3_plat_arch_setup(void);

 /* BL2U utility functions */
 void arm_bl2u_early_platform_setup(struct meminfo *mem_layout,
 				void *plat_info);
 void arm_bl2u_platform_setup(void);
 void arm_bl2u_plat_arch_setup(void);

 /* BL31 utility functions */
 void arm_bl31_early_platform_setup(void *from_bl2, uintptr_t soc_fw_config,
 				uintptr_t hw_config, void *plat_params_from_bl2);
 void arm_bl31_platform_setup(void);
 void arm_bl31_plat_runtime_setup(void);
 void arm_bl31_plat_arch_setup(void);

 /* TSP utility functions */
 void arm_tsp_early_platform_setup(void);

 /* SP_MIN utility functions */
 void arm_sp_min_early_platform_setup(void *from_bl2, uintptr_t tos_fw_config,
 				uintptr_t hw_config, void *plat_params_from_bl2);
 void arm_sp_min_plat_runtime_setup(void);

 /* FIP TOC validity check */
 int arm_io_is_toc_valid(void);

 /* Utility functions for Dynamic Config */
 void arm_load_tb_fw_config(void);
 void arm_bl2_set_tb_cfg_addr(void *dtb);
 void arm_bl2_dyn_cfg_init(void);
 void arm_bl1_set_mbedtls_heap(void);
 int arm_get_mbedtls_heap(void **heap_addr, size_t *heap_size);

 /*
  * Free the memory storing initialization code only used during an images boot
  * time so it can be reclaimed for runtime data
  */
 void arm_free_init_memory(void);

 /*
  * Mandatory functions required in ARM standard platforms
  */
 unsigned int plat_arm_get_cluster_core_count(u_register_t mpidr);
 void plat_arm_gic_driver_init(void);
 void plat_arm_gic_init(void);
 void plat_arm_gic_cpuif_enable(void);
 void plat_arm_gic_cpuif_disable(void);
 void plat_arm_gic_redistif_on(void);
 void plat_arm_gic_redistif_off(void);
 void plat_arm_gic_pcpu_init(void);
 void plat_arm_gic_save(void);
 void plat_arm_gic_resume(void);
 void plat_arm_security_setup(void);
 void plat_arm_pwrc_setup(void);
 void plat_arm_interconnect_init(void);
 void plat_arm_interconnect_enter_coherency(void);
 void plat_arm_interconnect_exit_coherency(void);
 void plat_arm_program_trusted_mailbox(uintptr_t address);
 int plat_arm_bl1_fwu_needed(void);
 __dead2 void plat_arm_error_handler(int err);

 /*
  * Optional function in ARM standard platforms
  */
 void plat_arm_override_gicr_frames(const uintptr_t *plat_gicr_frames);

 #if ARM_PLAT_MT
 unsigned int plat_arm_get_cpu_pe_count(u_register_t mpidr);
 #endif

 /*
  * This function is called after loading SCP_BL2 image and it is used to perform
  * any platform-specific actions required to handle the SCP firmware.
  */
 int plat_arm_bl2_handle_scp_bl2(struct image_info *scp_bl2_image_info);

 /*
  * Optional functions required in ARM standard platforms
  */
 void plat_arm_io_setup(void);
 int plat_arm_get_alt_image_source(
 	unsigned int image_id,
 	uintptr_t *dev_handle,
 	uintptr_t *image_spec);
 unsigned int plat_arm_calc_core_pos(u_register_t mpidr);
 const mmap_region_t *plat_arm_get_mmap(void);

 /* Allow platform to override psci_pm_ops during runtime */
 const plat_psci_ops_t *plat_arm_psci_override_pm_ops(plat_psci_ops_t *ops);

 /* Execution state switch in ARM platforms */
 int arm_execution_state_switch(unsigned int smc_fid,
 		uint32_t pc_hi,
 		uint32_t pc_lo,
 		uint32_t cookie_hi,
 		uint32_t cookie_lo,
 		void *handle);

 /* Optional functions for SP_MIN */
 void plat_arm_sp_min_early_platform_setup(u_register_t arg0, u_register_t arg1,
 			u_register_t arg2, u_register_t arg3);

 /* global variables */
 extern plat_psci_ops_t plat_arm_psci_pm_ops;
 extern const mmap_region_t plat_arm_mmap[];
 extern const unsigned int arm_pm_idle_states[];

 /* secure watchdog */
 void plat_arm_secure_wdt_start(void);
 void plat_arm_secure_wdt_stop(void);

 #endif /* PLAT_ARM_H */
	/*
	* Copyright (c) 2015-2019, ARM Limited and Contributors. All rights reserved.
	*
	* SPDX-License-Identifier: BSD-3-Clause
	*/
	#ifndef PLAT_ARM_H
	#define PLAT_ARM_H

	#include <stdint.h>

	#include <drivers/arm/tzc_common.h>
	#include <lib/bakery_lock.h>
	#include <lib/cassert.h>
	#include <lib/el3_runtime/cpu_data.h>
	#include <lib/spinlock.h>
	#include <lib/utils_def.h>
	#include <lib/xlat_tables/xlat_tables_compat.h>

	/*******************************************************************************
	* Forward declarations
	******************************************************************************/
	struct meminfo;
	struct image_info;
	struct bl_params;

	typedef struct arm_tzc_regions_info {
	unsigned long long base;
	unsigned long long end;
	unsigned int sec_attr;
	unsigned int nsaid_permissions;
	} arm_tzc_regions_info_t;

	/*******************************************************************************
	* Default mapping definition of the TrustZone Controller for ARM standard
	* platforms.
	* Configure:
	* - Region 0 with no access;
	* - Region 1 with secure access only;
	* - the remaining DRAM regions access from the given Non-Secure masters.
	******************************************************************************/
	#if ENABLE_SPM && SPM_MM
	#define ARM_TZC_REGIONS_DEF \
	{ARM_AP_TZC_DRAM1_BASE, ARM_EL3_TZC_DRAM1_END, \
	TZC_REGION_S_RDWR, 0}, \
	{ARM_NS_DRAM1_BASE, ARM_NS_DRAM1_END, ARM_TZC_NS_DRAM_S_ACCESS, \
	PLAT_ARM_TZC_NS_DEV_ACCESS}, \
	{ARM_DRAM2_BASE, ARM_DRAM2_END, ARM_TZC_NS_DRAM_S_ACCESS, \
	PLAT_ARM_TZC_NS_DEV_ACCESS}, \
	{PLAT_SP_IMAGE_NS_BUF_BASE, (PLAT_SP_IMAGE_NS_BUF_BASE + \
	PLAT_SP_IMAGE_NS_BUF_SIZE) - 1, TZC_REGION_S_NONE, \
	PLAT_ARM_TZC_NS_DEV_ACCESS}

	#else
	#define ARM_TZC_REGIONS_DEF \
	{ARM_AP_TZC_DRAM1_BASE, ARM_EL3_TZC_DRAM1_END, \
	TZC_REGION_S_RDWR, 0}, \
	{ARM_NS_DRAM1_BASE, ARM_NS_DRAM1_END, ARM_TZC_NS_DRAM_S_ACCESS, \
	PLAT_ARM_TZC_NS_DEV_ACCESS}, \
	{ARM_DRAM2_BASE, ARM_DRAM2_END, ARM_TZC_NS_DRAM_S_ACCESS, \
	PLAT_ARM_TZC_NS_DEV_ACCESS}
	#endif

	#define ARM_CASSERT_MMAP \
	CASSERT((ARRAY_SIZE(plat_arm_mmap) - 1) <= PLAT_ARM_MMAP_ENTRIES, \
	assert_plat_arm_mmap_mismatch); \
	CASSERT((PLAT_ARM_MMAP_ENTRIES + ARM_BL_REGIONS) \
	<= MAX_MMAP_REGIONS, \
	assert_max_mmap_regions);

	void arm_setup_romlib(void);

	#if defined(IMAGE_BL31) \|\| (!defined(__aarch64__) && defined(IMAGE_BL32))
	/*
	* Use this macro to instantiate lock before it is used in below
	* arm_lock_xxx() macros
	*/
	#define ARM_INSTANTIATE_LOCK static DEFINE_BAKERY_LOCK(arm_lock)
	#define ARM_LOCK_GET_INSTANCE (&arm_lock)

	#if !HW_ASSISTED_COHERENCY
	#define ARM_SCMI_INSTANTIATE_LOCK DEFINE_BAKERY_LOCK(arm_scmi_lock)
	#else
	#define ARM_SCMI_INSTANTIATE_LOCK spinlock_t arm_scmi_lock
	#endif
	#define ARM_SCMI_LOCK_GET_INSTANCE (&arm_scmi_lock)

	/*
	* These are wrapper macros to the Coherent Memory Bakery Lock API.
	*/
	#define arm_lock_init() bakery_lock_init(&arm_lock)
	#define arm_lock_get() bakery_lock_get(&arm_lock)
	#define arm_lock_release() bakery_lock_release(&arm_lock)

	#else

	/*
	* Empty macros for all other BL stages other than BL31 and BL32
	*/
	#define ARM_INSTANTIATE_LOCK static int arm_lock __unused
	#define ARM_LOCK_GET_INSTANCE 0
	#define arm_lock_init()
	#define arm_lock_get()
	#define arm_lock_release()

	#endif /* defined(IMAGE_BL31) \|\| (!defined(__aarch64__) && defined(IMAGE_BL32)) */

	#if ARM_RECOM_STATE_ID_ENC
	/*
	* Macros used to parse state information from State-ID if it is using the
	* recommended encoding for State-ID.
	*/
	#define ARM_LOCAL_PSTATE_WIDTH 4
	#define ARM_LOCAL_PSTATE_MASK ((1 << ARM_LOCAL_PSTATE_WIDTH) - 1)

	/* Macros to construct the composite power state */

	/* Make composite power state parameter till power level 0 */
	#if PSCI_EXTENDED_STATE_ID

	#define arm_make_pwrstate_lvl0(lvl0_state, pwr_lvl, type) \
	(((lvl0_state) << PSTATE_ID_SHIFT) \| ((type) << PSTATE_TYPE_SHIFT))
	#else
	#define arm_make_pwrstate_lvl0(lvl0_state, pwr_lvl, type) \
	(((lvl0_state) << PSTATE_ID_SHIFT) \| \
	((pwr_lvl) << PSTATE_PWR_LVL_SHIFT) \| \
	((type) << PSTATE_TYPE_SHIFT))
	#endif /* __PSCI_EXTENDED_STATE_ID__ */

	/* Make composite power state parameter till power level 1 */
	#define arm_make_pwrstate_lvl1(lvl1_state, lvl0_state, pwr_lvl, type) \
	(((lvl1_state) << ARM_LOCAL_PSTATE_WIDTH) \| \
	arm_make_pwrstate_lvl0(lvl0_state, pwr_lvl, type))

	/* Make composite power state parameter till power level 2 */
	#define arm_make_pwrstate_lvl2(lvl2_state, lvl1_state, lvl0_state, pwr_lvl, type) \
	(((lvl2_state) << (ARM_LOCAL_PSTATE_WIDTH * 2)) \| \
	arm_make_pwrstate_lvl1(lvl1_state, lvl0_state, pwr_lvl, type))

	#endif /* __ARM_RECOM_STATE_ID_ENC__ */

	/* ARM State switch error codes */
	#define STATE_SW_E_PARAM (-2)
	#define STATE_SW_E_DENIED (-3)

	/* IO storage utility functions */
	void arm_io_setup(void);

	/* Security utility functions */
	void arm_tzc400_setup(const arm_tzc_regions_info_t *tzc_regions);
	struct tzc_dmc500_driver_data;
	void arm_tzc_dmc500_setup(struct tzc_dmc500_driver_data *plat_driver_data,
	const arm_tzc_regions_info_t *tzc_regions);

	/* Console utility functions */
	void arm_console_boot_init(void);
	void arm_console_boot_end(void);
	void arm_console_runtime_init(void);
	void arm_console_runtime_end(void);

	/* Systimer utility function */
	void arm_configure_sys_timer(void);

	/* PM utility functions */
	int arm_validate_power_state(unsigned int power_state,
	psci_power_state_t *req_state);
	int arm_validate_psci_entrypoint(uintptr_t entrypoint);
	int arm_validate_ns_entrypoint(uintptr_t entrypoint);
	void arm_system_pwr_domain_save(void);
	void arm_system_pwr_domain_resume(void);
	int arm_psci_read_mem_protect(int *enabled);
	int arm_nor_psci_write_mem_protect(int val);
	void arm_nor_psci_do_static_mem_protect(void);
	void arm_nor_psci_do_dyn_mem_protect(void);
	int arm_psci_mem_protect_chk(uintptr_t base, u_register_t length);

	/* Topology utility function */
	int arm_check_mpidr(u_register_t mpidr);

	/* BL1 utility functions */
	void arm_bl1_early_platform_setup(void);
	void arm_bl1_platform_setup(void);
	void arm_bl1_plat_arch_setup(void);

	/* BL2 utility functions */
	void arm_bl2_early_platform_setup(uintptr_t tb_fw_config, struct meminfo *mem_layout);
	void arm_bl2_platform_setup(void);
	void arm_bl2_plat_arch_setup(void);
	uint32_t arm_get_spsr_for_bl32_entry(void);
	uint32_t arm_get_spsr_for_bl33_entry(void);
	int arm_bl2_plat_handle_post_image_load(unsigned int image_id);
	int arm_bl2_handle_post_image_load(unsigned int image_id);
	struct bl_params *arm_get_next_bl_params(void);

	/* BL2 at EL3 functions */
	void arm_bl2_el3_early_platform_setup(void);
	void arm_bl2_el3_plat_arch_setup(void);

	/* BL2U utility functions */
	void arm_bl2u_early_platform_setup(struct meminfo *mem_layout,
	void *plat_info);
	void arm_bl2u_platform_setup(void);
	void arm_bl2u_plat_arch_setup(void);

	/* BL31 utility functions */
	void arm_bl31_early_platform_setup(void *from_bl2, uintptr_t soc_fw_config,
	uintptr_t hw_config, void *plat_params_from_bl2);
	void arm_bl31_platform_setup(void);
	void arm_bl31_plat_runtime_setup(void);
	void arm_bl31_plat_arch_setup(void);

	/* TSP utility functions */
	void arm_tsp_early_platform_setup(void);

	/* SP_MIN utility functions */
	void arm_sp_min_early_platform_setup(void *from_bl2, uintptr_t tos_fw_config,
	uintptr_t hw_config, void *plat_params_from_bl2);
	void arm_sp_min_plat_runtime_setup(void);

	/* FIP TOC validity check */
	int arm_io_is_toc_valid(void);

	/* Utility functions for Dynamic Config */
	void arm_load_tb_fw_config(void);
	void arm_bl2_set_tb_cfg_addr(void *dtb);
	void arm_bl2_dyn_cfg_init(void);
	void arm_bl1_set_mbedtls_heap(void);
	int arm_get_mbedtls_heap(void *heap_addr, size_t heap_size);

	/*
	* Free the memory storing initialization code only used during an images boot
	* time so it can be reclaimed for runtime data
	*/
	void arm_free_init_memory(void);

	/*
	* Mandatory functions required in ARM standard platforms
	*/
	unsigned int plat_arm_get_cluster_core_count(u_register_t mpidr);
	void plat_arm_gic_driver_init(void);
	void plat_arm_gic_init(void);
	void plat_arm_gic_cpuif_enable(void);
	void plat_arm_gic_cpuif_disable(void);
	void plat_arm_gic_redistif_on(void);
	void plat_arm_gic_redistif_off(void);
	void plat_arm_gic_pcpu_init(void);
	void plat_arm_gic_save(void);
	void plat_arm_gic_resume(void);
	void plat_arm_security_setup(void);
	void plat_arm_pwrc_setup(void);
	void plat_arm_interconnect_init(void);
	void plat_arm_interconnect_enter_coherency(void);
	void plat_arm_interconnect_exit_coherency(void);
	void plat_arm_program_trusted_mailbox(uintptr_t address);
	int plat_arm_bl1_fwu_needed(void);
	__dead2 void plat_arm_error_handler(int err);

	/*
	* Optional function in ARM standard platforms
	*/
	void plat_arm_override_gicr_frames(const uintptr_t *plat_gicr_frames);

	#if ARM_PLAT_MT
	unsigned int plat_arm_get_cpu_pe_count(u_register_t mpidr);
	#endif

	/*
	* This function is called after loading SCP_BL2 image and it is used to perform
	* any platform-specific actions required to handle the SCP firmware.
	*/
	int plat_arm_bl2_handle_scp_bl2(struct image_info *scp_bl2_image_info);

	/*
	* Optional functions required in ARM standard platforms
	*/
	void plat_arm_io_setup(void);
	int plat_arm_get_alt_image_source(
	unsigned int image_id,
	uintptr_t *dev_handle,
	uintptr_t *image_spec);
	unsigned int plat_arm_calc_core_pos(u_register_t mpidr);
	const mmap_region_t *plat_arm_get_mmap(void);

	/* Allow platform to override psci_pm_ops during runtime */
	const plat_psci_ops_t plat_arm_psci_override_pm_ops(plat_psci_ops_t ops);

	/* Execution state switch in ARM platforms */
	int arm_execution_state_switch(unsigned int smc_fid,
	uint32_t pc_hi,
	uint32_t pc_lo,
	uint32_t cookie_hi,
	uint32_t cookie_lo,
	void *handle);

	/* Optional functions for SP_MIN */
	void plat_arm_sp_min_early_platform_setup(u_register_t arg0, u_register_t arg1,
	u_register_t arg2, u_register_t arg3);

	/* global variables */
	extern plat_psci_ops_t plat_arm_psci_pm_ops;
	extern const mmap_region_t plat_arm_mmap[];
	extern const unsigned int arm_pm_idle_states[];

	/* secure watchdog */
	void plat_arm_secure_wdt_start(void);
	void plat_arm_secure_wdt_stop(void);

	#endif /* PLAT_ARM_H */