plat_arm.h

/*
 * Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */
#ifndef PLAT_ARM_H
#define PLAT_ARM_H

#include <stdbool.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 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)

/* plat_get_rotpk_info() flags */
#define ARM_ROTPK_REGS_ID		1
#define ARM_ROTPK_DEVEL_RSA_ID		2
#define ARM_ROTPK_DEVEL_ECDSA_ID	3

/* Defines used to retrieve ARM SOC revision */
#define ARM_SOC_CONTINUATION_CODE	U(0x4)
#define ARM_SOC_IDENTIFICATION_CODE	U(0x3B)
#define ARM_SOC_CONTINUATION_SHIFT	U(24)
#define ARM_SOC_IDENTIFICATION_SHIFT	U(16)

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

/* Security utility functions */
void arm_tzc400_setup(uintptr_t tzc_base,
			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);
void arm_sp_min_plat_arch_setup(void);

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

/* Utility functions for Dynamic Config */
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);

#if MEASURED_BOOT
/* Measured boot related functions */
void arm_bl1_set_bl2_hash(image_desc_t *image_desc);
#endif

/*
 * 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);

/*
 * Make the higher level translation tables read-only
 */
void arm_xlat_make_tables_readonly(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);
bool plat_arm_bl1_fwu_needed(void);
__dead2 void plat_arm_error_handler(int err);

/*
 * Optional functions in ARM standard platforms
 */
void plat_arm_override_gicr_frames(const uintptr_t *plat_gicr_frames);
int arm_get_rotpk_info(void *cookie, void **key_ptr, unsigned int *key_len,
	unsigned int *flags);
int arm_get_rotpk_info_regs(void **key_ptr, unsigned int *key_len,
	unsigned int *flags);
int arm_get_rotpk_info_cc(void **key_ptr, unsigned int *key_len,
	unsigned int *flags);
int arm_get_rotpk_info_dev(void **key_ptr, unsigned int *key_len,
	unsigned int *flags);

#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);

/* Get SOC-ID of ARM platform */
uint32_t plat_arm_get_soc_id(void);

#endif /* PLAT_ARM_H */