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c0aff0e0b4
This patch adds support for SYSTEM_SUSPEND API as mentioned in the PSCI 1.0 specification. This API, on being invoked on the last running core on a supported platform, will put the system into a low power mode with memory retention. The psci_afflvl_suspend() internal API has been reused as most of the actions to suspend a system are the same as invoking the PSCI CPU_SUSPEND API with the target affinity level as 'system'. This API needs the 'power state' parameter for the target low power state. This parameter is not passed by the caller of the SYSTEM_SUSPEND API. Hence, the platform needs to implement the get_sys_suspend_power_state() platform function to provide this information. Also, the platform also needs to add support for suspending the system to the existing 'plat_pm_ops' functions: affinst_suspend() and affinst_suspend_finish(). Change-Id: Ib6bf10809cb4e9b92f463755608889aedd83cef5
259 lines
10 KiB
C
259 lines
10 KiB
C
/*
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* Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of ARM nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __PSCI_H__
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#define __PSCI_H__
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#include <bakery_lock.h>
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#include <platform_def.h> /* for PLATFORM_NUM_AFFS */
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/*******************************************************************************
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* Number of affinity instances whose state this psci imp. can track
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******************************************************************************/
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#ifdef PLATFORM_NUM_AFFS
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#define PSCI_NUM_AFFS PLATFORM_NUM_AFFS
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#else
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#define PSCI_NUM_AFFS (2 * PLATFORM_CORE_COUNT)
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#endif
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/*******************************************************************************
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* Defines for runtime services func ids
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******************************************************************************/
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#define PSCI_VERSION 0x84000000
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#define PSCI_CPU_SUSPEND_AARCH32 0x84000001
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#define PSCI_CPU_SUSPEND_AARCH64 0xc4000001
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#define PSCI_CPU_OFF 0x84000002
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#define PSCI_CPU_ON_AARCH32 0x84000003
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#define PSCI_CPU_ON_AARCH64 0xc4000003
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#define PSCI_AFFINITY_INFO_AARCH32 0x84000004
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#define PSCI_AFFINITY_INFO_AARCH64 0xc4000004
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#define PSCI_MIG_AARCH32 0x84000005
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#define PSCI_MIG_AARCH64 0xc4000005
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#define PSCI_MIG_INFO_TYPE 0x84000006
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#define PSCI_MIG_INFO_UP_CPU_AARCH32 0x84000007
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#define PSCI_MIG_INFO_UP_CPU_AARCH64 0xc4000007
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#define PSCI_SYSTEM_OFF 0x84000008
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#define PSCI_SYSTEM_RESET 0x84000009
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#define PSCI_FEATURES 0x8400000A
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#define PSCI_SYSTEM_SUSPEND_AARCH32 0x8400000E
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#define PSCI_SYSTEM_SUSPEND_AARCH64 0xc400000E
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/* Macro to help build the psci capabilities bitfield */
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#define define_psci_cap(x) (1 << (x & 0x1f))
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/*
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* Number of PSCI calls (above) implemented
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*/
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#define PSCI_NUM_CALLS 18
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/*******************************************************************************
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* PSCI Migrate and friends
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******************************************************************************/
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#define PSCI_TOS_UP_MIG_CAP 0
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#define PSCI_TOS_NOT_UP_MIG_CAP 1
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#define PSCI_TOS_NOT_PRESENT_MP 2
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/*******************************************************************************
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* PSCI CPU_SUSPEND 'power_state' parameter specific defines
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******************************************************************************/
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#define PSTATE_ID_SHIFT 0
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#define PSTATE_TYPE_SHIFT 16
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#define PSTATE_AFF_LVL_SHIFT 24
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#define PSTATE_ID_MASK 0xffff
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#define PSTATE_TYPE_MASK 0x1
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#define PSTATE_AFF_LVL_MASK 0x3
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#define PSTATE_VALID_MASK 0xFCFE0000
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#define PSTATE_TYPE_STANDBY 0x0
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#define PSTATE_TYPE_POWERDOWN 0x1
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#define psci_get_pstate_id(pstate) (((pstate) >> PSTATE_ID_SHIFT) & \
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PSTATE_ID_MASK)
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#define psci_get_pstate_type(pstate) (((pstate) >> PSTATE_TYPE_SHIFT) & \
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PSTATE_TYPE_MASK)
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#define psci_get_pstate_afflvl(pstate) (((pstate) >> PSTATE_AFF_LVL_SHIFT) & \
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PSTATE_AFF_LVL_MASK)
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#define psci_make_powerstate(state_id, type, afflvl) \
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(((state_id) & PSTATE_ID_MASK) << PSTATE_ID_SHIFT) |\
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(((type) & PSTATE_TYPE_MASK) << PSTATE_TYPE_SHIFT) |\
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(((afflvl) & PSTATE_AFF_LVL_MASK) << PSTATE_AFF_LVL_SHIFT)
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/*******************************************************************************
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* PSCI CPU_FEATURES feature flag specific defines
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******************************************************************************/
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/* Features flags for CPU SUSPEND power state parameter format. Bits [1:1] */
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#define FF_PSTATE_SHIFT 1
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#define FF_PSTATE_ORIG 0
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#define FF_PSTATE_EXTENDED 1
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/* Features flags for CPU SUSPEND OS Initiated mode support. Bits [0:0] */
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#define FF_MODE_SUPPORT_SHIFT 0
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#define FF_SUPPORTS_OS_INIT_MODE 1
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/*******************************************************************************
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* PSCI version
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******************************************************************************/
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#define PSCI_MAJOR_VER (1 << 16)
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#define PSCI_MINOR_VER 0x0
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/*******************************************************************************
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* PSCI error codes
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******************************************************************************/
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#define PSCI_E_SUCCESS 0
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#define PSCI_E_NOT_SUPPORTED -1
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#define PSCI_E_INVALID_PARAMS -2
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#define PSCI_E_DENIED -3
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#define PSCI_E_ALREADY_ON -4
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#define PSCI_E_ON_PENDING -5
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#define PSCI_E_INTERN_FAIL -6
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#define PSCI_E_NOT_PRESENT -7
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#define PSCI_E_DISABLED -8
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/*******************************************************************************
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* PSCI affinity state related constants. An affinity instance could be present
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* or absent physically to cater for asymmetric topologies. If present then it
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* could in one of the 4 further defined states.
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******************************************************************************/
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#define PSCI_STATE_SHIFT 1
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#define PSCI_STATE_MASK 0xff
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#define PSCI_AFF_ABSENT 0x0
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#define PSCI_AFF_PRESENT 0x1
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#define PSCI_STATE_ON 0x0
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#define PSCI_STATE_OFF 0x1
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#define PSCI_STATE_ON_PENDING 0x2
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#define PSCI_STATE_SUSPEND 0x3
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#define PSCI_INVALID_DATA -1
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#define get_phys_state(x) (x != PSCI_STATE_ON ? \
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PSCI_STATE_OFF : PSCI_STATE_ON)
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#define psci_validate_power_state(pstate) (pstate & PSTATE_VALID_MASK)
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#ifndef __ASSEMBLY__
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#include <stdint.h>
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/*******************************************************************************
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* Structure used to store per-cpu information relevant to the PSCI service.
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* It is populated in the per-cpu data array. In return we get a guarantee that
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* this information will not reside on a cache line shared with another cpu.
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******************************************************************************/
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typedef struct psci_cpu_data {
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uint32_t power_state;
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uint32_t max_phys_off_afflvl; /* Highest affinity level in physically
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powered off state */
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#if !USE_COHERENT_MEM
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bakery_info_t pcpu_bakery_info[PSCI_NUM_AFFS];
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#endif
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} psci_cpu_data_t;
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/*******************************************************************************
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* Structure populated by platform specific code to export routines which
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* perform common low level pm functions
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******************************************************************************/
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typedef struct plat_pm_ops {
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void (*affinst_standby)(unsigned int power_state);
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int (*affinst_on)(unsigned long mpidr,
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unsigned long sec_entrypoint,
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unsigned int afflvl,
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unsigned int state);
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void (*affinst_off)(unsigned int afflvl, unsigned int state);
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void (*affinst_suspend)(unsigned long sec_entrypoint,
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unsigned int afflvl,
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unsigned int state);
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void (*affinst_on_finish)(unsigned int afflvl, unsigned int state);
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void (*affinst_suspend_finish)(unsigned int afflvl,
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unsigned int state);
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void (*system_off)(void) __dead2;
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void (*system_reset)(void) __dead2;
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int (*validate_power_state)(unsigned int power_state);
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int (*validate_ns_entrypoint)(unsigned long ns_entrypoint);
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unsigned int (*get_sys_suspend_power_state)(void);
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} plat_pm_ops_t;
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/*******************************************************************************
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* Optional structure populated by the Secure Payload Dispatcher to be given a
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* chance to perform any bookkeeping before PSCI executes a power mgmt.
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* operation. It also allows PSCI to determine certain properties of the SP e.g.
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* migrate capability etc.
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******************************************************************************/
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typedef struct spd_pm_ops {
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void (*svc_on)(uint64_t target_cpu);
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int32_t (*svc_off)(uint64_t __unused);
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void (*svc_suspend)(uint64_t __unused);
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void (*svc_on_finish)(uint64_t __unused);
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void (*svc_suspend_finish)(uint64_t suspend_level);
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int32_t (*svc_migrate)(uint64_t from_cpu, uint64_t to_cpu);
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int32_t (*svc_migrate_info)(uint64_t *resident_cpu);
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void (*svc_system_off)(void);
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void (*svc_system_reset)(void);
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} spd_pm_ops_t;
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/*******************************************************************************
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* Function & Data prototypes
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******************************************************************************/
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unsigned int psci_version(void);
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int psci_affinity_info(unsigned long, unsigned int);
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int psci_migrate(unsigned long);
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int psci_migrate_info_type(void);
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long psci_migrate_info_up_cpu(void);
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int psci_cpu_on(unsigned long,
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unsigned long,
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unsigned long);
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void __dead2 psci_power_down_wfi(void);
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void psci_aff_on_finish_entry(void);
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void psci_aff_suspend_finish_entry(void);
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void psci_register_spd_pm_hook(const spd_pm_ops_t *);
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int psci_get_suspend_stateid_by_mpidr(unsigned long);
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int psci_get_suspend_stateid(void);
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int psci_get_suspend_afflvl(void);
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uint32_t psci_get_max_phys_off_afflvl(void);
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uint64_t psci_smc_handler(uint32_t smc_fid,
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uint64_t x1,
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uint64_t x2,
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uint64_t x3,
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uint64_t x4,
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void *cookie,
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void *handle,
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uint64_t flags);
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/* PSCI setup function */
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int32_t psci_setup(void);
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#endif /*__ASSEMBLY__*/
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#endif /* __PSCI_H__ */
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