diff options
Diffstat (limited to '')
| -rw-r--r-- | include/lib/psci/psci.h | 355 |
1 files changed, 355 insertions, 0 deletions
diff --git a/include/lib/psci/psci.h b/include/lib/psci/psci.h new file mode 100644 index 0000000..b56e98b --- /dev/null +++ b/include/lib/psci/psci.h @@ -0,0 +1,355 @@ +/* + * Copyright (c) 2013-2019, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#ifndef PSCI_H +#define PSCI_H + +#include <platform_def.h> /* for PLAT_NUM_PWR_DOMAINS */ + +#include <common/bl_common.h> +#include <lib/bakery_lock.h> +#include <lib/psci/psci_lib.h> /* To maintain compatibility for SPDs */ +#include <lib/utils_def.h> + +/******************************************************************************* + * Number of power domains whose state this PSCI implementation can track + ******************************************************************************/ +#ifdef PLAT_NUM_PWR_DOMAINS +#define PSCI_NUM_PWR_DOMAINS PLAT_NUM_PWR_DOMAINS +#else +#define PSCI_NUM_PWR_DOMAINS (U(2) * PLATFORM_CORE_COUNT) +#endif + +#define PSCI_NUM_NON_CPU_PWR_DOMAINS (PSCI_NUM_PWR_DOMAINS - \ + PLATFORM_CORE_COUNT) + +/* This is the power level corresponding to a CPU */ +#define PSCI_CPU_PWR_LVL U(0) + +/* + * The maximum power level supported by PSCI. Since PSCI CPU_SUSPEND + * uses the old power_state parameter format which has 2 bits to specify the + * power level, this constant is defined to be 3. + */ +#define PSCI_MAX_PWR_LVL U(3) + +/******************************************************************************* + * Defines for runtime services function ids + ******************************************************************************/ +#define PSCI_VERSION U(0x84000000) +#define PSCI_CPU_SUSPEND_AARCH32 U(0x84000001) +#define PSCI_CPU_SUSPEND_AARCH64 U(0xc4000001) +#define PSCI_CPU_OFF U(0x84000002) +#define PSCI_CPU_ON_AARCH32 U(0x84000003) +#define PSCI_CPU_ON_AARCH64 U(0xc4000003) +#define PSCI_AFFINITY_INFO_AARCH32 U(0x84000004) +#define PSCI_AFFINITY_INFO_AARCH64 U(0xc4000004) +#define PSCI_MIG_AARCH32 U(0x84000005) +#define PSCI_MIG_AARCH64 U(0xc4000005) +#define PSCI_MIG_INFO_TYPE U(0x84000006) +#define PSCI_MIG_INFO_UP_CPU_AARCH32 U(0x84000007) +#define PSCI_MIG_INFO_UP_CPU_AARCH64 U(0xc4000007) +#define PSCI_SYSTEM_OFF U(0x84000008) +#define PSCI_SYSTEM_RESET U(0x84000009) +#define PSCI_FEATURES U(0x8400000A) +#define PSCI_NODE_HW_STATE_AARCH32 U(0x8400000d) +#define PSCI_NODE_HW_STATE_AARCH64 U(0xc400000d) +#define PSCI_SYSTEM_SUSPEND_AARCH32 U(0x8400000E) +#define PSCI_SYSTEM_SUSPEND_AARCH64 U(0xc400000E) +#define PSCI_STAT_RESIDENCY_AARCH32 U(0x84000010) +#define PSCI_STAT_RESIDENCY_AARCH64 U(0xc4000010) +#define PSCI_STAT_COUNT_AARCH32 U(0x84000011) +#define PSCI_STAT_COUNT_AARCH64 U(0xc4000011) +#define PSCI_SYSTEM_RESET2_AARCH32 U(0x84000012) +#define PSCI_SYSTEM_RESET2_AARCH64 U(0xc4000012) +#define PSCI_MEM_PROTECT U(0x84000013) +#define PSCI_MEM_CHK_RANGE_AARCH32 U(0x84000014) +#define PSCI_MEM_CHK_RANGE_AARCH64 U(0xc4000014) + +/* + * Number of PSCI calls (above) implemented + */ +#if ENABLE_PSCI_STAT +#define PSCI_NUM_CALLS U(22) +#else +#define PSCI_NUM_CALLS U(18) +#endif + +/* The macros below are used to identify PSCI calls from the SMC function ID */ +#define PSCI_FID_MASK U(0xffe0) +#define PSCI_FID_VALUE U(0) +#define is_psci_fid(_fid) \ + (((_fid) & PSCI_FID_MASK) == PSCI_FID_VALUE) + +/******************************************************************************* + * PSCI Migrate and friends + ******************************************************************************/ +#define PSCI_TOS_UP_MIG_CAP 0 +#define PSCI_TOS_NOT_UP_MIG_CAP 1 +#define PSCI_TOS_NOT_PRESENT_MP 2 + +/******************************************************************************* + * PSCI CPU_SUSPEND 'power_state' parameter specific defines + ******************************************************************************/ +#define PSTATE_ID_SHIFT U(0) + +#if PSCI_EXTENDED_STATE_ID +#define PSTATE_VALID_MASK U(0xB0000000) +#define PSTATE_TYPE_SHIFT U(30) +#define PSTATE_ID_MASK U(0xfffffff) +#else +#define PSTATE_VALID_MASK U(0xFCFE0000) +#define PSTATE_TYPE_SHIFT U(16) +#define PSTATE_PWR_LVL_SHIFT U(24) +#define PSTATE_ID_MASK U(0xffff) +#define PSTATE_PWR_LVL_MASK U(0x3) + +#define psci_get_pstate_pwrlvl(pstate) (((pstate) >> PSTATE_PWR_LVL_SHIFT) & \ + PSTATE_PWR_LVL_MASK) +#define psci_make_powerstate(state_id, type, pwrlvl) \ + (((state_id) & PSTATE_ID_MASK) << PSTATE_ID_SHIFT) |\ + (((type) & PSTATE_TYPE_MASK) << PSTATE_TYPE_SHIFT) |\ + (((pwrlvl) & PSTATE_PWR_LVL_MASK) << PSTATE_PWR_LVL_SHIFT) +#endif /* __PSCI_EXTENDED_STATE_ID__ */ + +#define PSTATE_TYPE_STANDBY U(0x0) +#define PSTATE_TYPE_POWERDOWN U(0x1) +#define PSTATE_TYPE_MASK U(0x1) + +/******************************************************************************* + * PSCI CPU_FEATURES feature flag specific defines + ******************************************************************************/ +/* Features flags for CPU SUSPEND power state parameter format. Bits [1:1] */ +#define FF_PSTATE_SHIFT U(1) +#define FF_PSTATE_ORIG U(0) +#define FF_PSTATE_EXTENDED U(1) +#if PSCI_EXTENDED_STATE_ID +#define FF_PSTATE FF_PSTATE_EXTENDED +#else +#define FF_PSTATE FF_PSTATE_ORIG +#endif + +/* Features flags for CPU SUSPEND OS Initiated mode support. Bits [0:0] */ +#define FF_MODE_SUPPORT_SHIFT U(0) +#define FF_SUPPORTS_OS_INIT_MODE U(1) + +/******************************************************************************* + * PSCI version + ******************************************************************************/ +#define PSCI_MAJOR_VER (U(1) << 16) +#define PSCI_MINOR_VER U(0x1) + +/******************************************************************************* + * PSCI error codes + ******************************************************************************/ +#define PSCI_E_SUCCESS 0 +#define PSCI_E_NOT_SUPPORTED -1 +#define PSCI_E_INVALID_PARAMS -2 +#define PSCI_E_DENIED -3 +#define PSCI_E_ALREADY_ON -4 +#define PSCI_E_ON_PENDING -5 +#define PSCI_E_INTERN_FAIL -6 +#define PSCI_E_NOT_PRESENT -7 +#define PSCI_E_DISABLED -8 +#define PSCI_E_INVALID_ADDRESS -9 + +#define PSCI_INVALID_MPIDR ~((u_register_t)0) + +/* + * SYSTEM_RESET2 macros + */ +#define PSCI_RESET2_TYPE_VENDOR_SHIFT U(31) +#define PSCI_RESET2_TYPE_VENDOR (U(1) << PSCI_RESET2_TYPE_VENDOR_SHIFT) +#define PSCI_RESET2_TYPE_ARCH (U(0) << PSCI_RESET2_TYPE_VENDOR_SHIFT) +#define PSCI_RESET2_SYSTEM_WARM_RESET (PSCI_RESET2_TYPE_ARCH | U(0)) + +#ifndef __ASSEMBLER__ + +#include <stdint.h> + +/* Function to help build the psci capabilities bitfield */ + +static inline unsigned int define_psci_cap(unsigned int x) +{ + return U(1) << (x & U(0x1f)); +} + + +/* Power state helper functions */ + +static inline unsigned int psci_get_pstate_id(unsigned int power_state) +{ + return ((power_state) >> PSTATE_ID_SHIFT) & PSTATE_ID_MASK; +} + +static inline unsigned int psci_get_pstate_type(unsigned int power_state) +{ + return ((power_state) >> PSTATE_TYPE_SHIFT) & PSTATE_TYPE_MASK; +} + +static inline unsigned int psci_check_power_state(unsigned int power_state) +{ + return ((power_state) & PSTATE_VALID_MASK); +} + +/* + * These are the states reported by the PSCI_AFFINITY_INFO API for the specified + * CPU. The definitions of these states can be found in Section 5.7.1 in the + * PSCI specification (ARM DEN 0022C). + */ +typedef enum { + AFF_STATE_ON = U(0), + AFF_STATE_OFF = U(1), + AFF_STATE_ON_PENDING = U(2) +} aff_info_state_t; + +/* + * These are the power states reported by PSCI_NODE_HW_STATE API for the + * specified CPU. The definitions of these states can be found in Section 5.15.3 + * of PSCI specification (ARM DEN 0022C). + */ +#define HW_ON 0 +#define HW_OFF 1 +#define HW_STANDBY 2 + +/* + * Macro to represent invalid affinity level within PSCI. + */ +#define PSCI_INVALID_PWR_LVL (PLAT_MAX_PWR_LVL + U(1)) + +/* + * Type for representing the local power state at a particular level. + */ +typedef uint8_t plat_local_state_t; + +/* The local state macro used to represent RUN state. */ +#define PSCI_LOCAL_STATE_RUN U(0) + +/* + * Function to test whether the plat_local_state is RUN state + */ +static inline int is_local_state_run(unsigned int plat_local_state) +{ + return (plat_local_state == PSCI_LOCAL_STATE_RUN) ? 1 : 0; +} + +/* + * Function to test whether the plat_local_state is RETENTION state + */ +static inline int is_local_state_retn(unsigned int plat_local_state) +{ + return ((plat_local_state > PSCI_LOCAL_STATE_RUN) && + (plat_local_state <= PLAT_MAX_RET_STATE)) ? 1 : 0; +} + +/* + * Function to test whether the plat_local_state is OFF state + */ +static inline int is_local_state_off(unsigned int plat_local_state) +{ + return ((plat_local_state > PLAT_MAX_RET_STATE) && + (plat_local_state <= PLAT_MAX_OFF_STATE)) ? 1 : 0; +} + +/***************************************************************************** + * This data structure defines the representation of the power state parameter + * for its exchange between the generic PSCI code and the platform port. For + * example, it is used by the platform port to specify the requested power + * states during a power management operation. It is used by the generic code to + * inform the platform about the target power states that each level should + * enter. + ****************************************************************************/ +typedef struct psci_power_state { + /* + * The pwr_domain_state[] stores the local power state at each level + * for the CPU. + */ + plat_local_state_t pwr_domain_state[PLAT_MAX_PWR_LVL + U(1)]; +} psci_power_state_t; + +/******************************************************************************* + * Structure used to store per-cpu information relevant to the PSCI service. + * It is populated in the per-cpu data array. In return we get a guarantee that + * this information will not reside on a cache line shared with another cpu. + ******************************************************************************/ +typedef struct psci_cpu_data { + /* State as seen by PSCI Affinity Info API */ + aff_info_state_t aff_info_state; + + /* + * Highest power level which takes part in a power management + * operation. + */ + unsigned int target_pwrlvl; + + /* The local power state of this CPU */ + plat_local_state_t local_state; +} psci_cpu_data_t; + +/******************************************************************************* + * Structure populated by platform specific code to export routines which + * perform common low level power management functions + ******************************************************************************/ +typedef struct plat_psci_ops { + void (*cpu_standby)(plat_local_state_t cpu_state); + int (*pwr_domain_on)(u_register_t mpidr); + void (*pwr_domain_off)(const psci_power_state_t *target_state); + void (*pwr_domain_suspend_pwrdown_early)( + const psci_power_state_t *target_state); + void (*pwr_domain_suspend)(const psci_power_state_t *target_state); + void (*pwr_domain_on_finish)(const psci_power_state_t *target_state); + void (*pwr_domain_on_finish_late)( + const psci_power_state_t *target_state); + void (*pwr_domain_suspend_finish)( + const psci_power_state_t *target_state); + void __dead2 (*pwr_domain_pwr_down_wfi)( + const psci_power_state_t *target_state); + void __dead2 (*system_off)(void); + void __dead2 (*system_reset)(void); + int (*validate_power_state)(unsigned int power_state, + psci_power_state_t *req_state); + int (*validate_ns_entrypoint)(uintptr_t ns_entrypoint); + void (*get_sys_suspend_power_state)( + psci_power_state_t *req_state); + int (*get_pwr_lvl_state_idx)(plat_local_state_t pwr_domain_state, + int pwrlvl); + int (*translate_power_state_by_mpidr)(u_register_t mpidr, + unsigned int power_state, + psci_power_state_t *output_state); + int (*get_node_hw_state)(u_register_t mpidr, unsigned int power_level); + int (*mem_protect_chk)(uintptr_t base, u_register_t length); + int (*read_mem_protect)(int *val); + int (*write_mem_protect)(int val); + int (*system_reset2)(int is_vendor, + int reset_type, u_register_t cookie); +} plat_psci_ops_t; + +/******************************************************************************* + * Function & Data prototypes + ******************************************************************************/ +unsigned int psci_version(void); +int psci_cpu_on(u_register_t target_cpu, + uintptr_t entrypoint, + u_register_t context_id); +int psci_cpu_suspend(unsigned int power_state, + uintptr_t entrypoint, + u_register_t context_id); +int psci_system_suspend(uintptr_t entrypoint, u_register_t context_id); +int psci_cpu_off(void); +int psci_affinity_info(u_register_t target_affinity, + unsigned int lowest_affinity_level); +int psci_migrate(u_register_t target_cpu); +int psci_migrate_info_type(void); +u_register_t psci_migrate_info_up_cpu(void); +int psci_node_hw_state(u_register_t target_cpu, + unsigned int power_level); +int psci_features(unsigned int psci_fid); +void __dead2 psci_power_down_wfi(void); +void psci_arch_setup(void); + +#endif /*__ASSEMBLER__*/ + +#endif /* PSCI_H */ |