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https://github.com/ARM-software/arm-trusted-firmware.git
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167a935733
Consolidate all BL3-1 CPU context initialization for cold boot, PSCI and SPDs into two functions: * The first uses entry_point_info to initialize the relevant cpu_context for first entry into a lower exception level on a CPU * The second populates the EL1 and EL2 system registers as needed from the cpu_context to ensure correct entry into the lower EL This patch alters the way that BL3-1 determines which exception level is used when first entering EL1 or EL2 during cold boot - this is now fully determined by the SPSR value in the entry_point_info for BL3-3, as set up by the platform code in BL2 (or otherwise provided to BL3-1). In the situation that EL1 (or svc mode) is selected for a processor that supports EL2, the context management code will now configure all essential EL2 register state to ensure correct execution of EL1. This allows the platform code to run non-secure EL1 payloads directly without requiring a small EL2 stub or OS loader. Change-Id: If9fbb2417e82d2226e47568203d5a369f39d3b0f
138 lines
5.4 KiB
C
138 lines
5.4 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_PRIVATE_H__
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#define __PSCI_PRIVATE_H__
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#include <arch.h>
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#include <bakery_lock.h>
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#include <psci.h>
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/*******************************************************************************
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* The following two data structures hold the topology tree which in turn tracks
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* the state of the all the affinity instances supported by the platform.
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******************************************************************************/
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typedef struct aff_map_node {
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unsigned long mpidr;
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unsigned short ref_count;
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unsigned char state;
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unsigned char level;
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unsigned int data;
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bakery_lock_t lock;
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} aff_map_node_t;
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typedef struct aff_limits_node {
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int min;
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int max;
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} aff_limits_node_t;
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/*******************************************************************************
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* This data structure holds secure world context that needs to be preserved
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* across cpu_suspend calls which enter the power down state.
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******************************************************************************/
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typedef struct suspend_context {
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unsigned int power_state;
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} __aligned(CACHE_WRITEBACK_GRANULE) suspend_context_t;
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typedef aff_map_node_t (*mpidr_aff_map_nodes_t[MPIDR_MAX_AFFLVL]);
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typedef unsigned int (*afflvl_power_on_finisher_t)(unsigned long,
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aff_map_node_t *);
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/*******************************************************************************
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* Data prototypes
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******************************************************************************/
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extern suspend_context_t psci_suspend_context[PSCI_NUM_AFFS];
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extern const plat_pm_ops_t *psci_plat_pm_ops;
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extern aff_map_node_t psci_aff_map[PSCI_NUM_AFFS];
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/*******************************************************************************
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* SPD's power management hooks registered with PSCI
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******************************************************************************/
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extern const spd_pm_ops_t *psci_spd_pm;
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/*******************************************************************************
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* Function prototypes
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******************************************************************************/
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/* Private exported functions from psci_common.c */
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int get_max_afflvl(void);
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unsigned short psci_get_state(aff_map_node_t *node);
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unsigned short psci_get_phys_state(aff_map_node_t *node);
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void psci_set_state(aff_map_node_t *node, unsigned short state);
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unsigned long mpidr_set_aff_inst(unsigned long, unsigned char, int);
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int psci_validate_mpidr(unsigned long, int);
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int get_power_on_target_afflvl(unsigned long mpidr);
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void psci_afflvl_power_on_finish(unsigned long,
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int,
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int,
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afflvl_power_on_finisher_t *);
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int psci_save_ns_entry(uint64_t mpidr,
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uint64_t entrypoint, uint64_t context_id,
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uint32_t caller_scr_el3, uint32_t caller_sctlr_el1);
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int psci_check_afflvl_range(int start_afflvl, int end_afflvl);
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void psci_acquire_afflvl_locks(unsigned long mpidr,
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int start_afflvl,
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int end_afflvl,
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mpidr_aff_map_nodes_t mpidr_nodes);
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void psci_release_afflvl_locks(unsigned long mpidr,
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int start_afflvl,
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int end_afflvl,
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mpidr_aff_map_nodes_t mpidr_nodes);
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/* Private exported functions from psci_setup.c */
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int psci_get_aff_map_nodes(unsigned long mpidr,
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int start_afflvl,
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int end_afflvl,
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mpidr_aff_map_nodes_t mpidr_nodes);
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aff_map_node_t *psci_get_aff_map_node(unsigned long, int);
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/* Private exported functions from psci_affinity_on.c */
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int psci_afflvl_on(unsigned long,
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unsigned long,
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unsigned long,
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int,
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int);
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/* Private exported functions from psci_affinity_off.c */
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int psci_afflvl_off(unsigned long, int, int);
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/* Private exported functions from psci_affinity_suspend.c */
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void psci_set_suspend_power_state(aff_map_node_t *node,
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unsigned int power_state);
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int psci_get_aff_map_node_suspend_afflvl(aff_map_node_t *node);
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int psci_afflvl_suspend(unsigned long,
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unsigned long,
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unsigned long,
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unsigned int,
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int,
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int);
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unsigned int psci_afflvl_suspend_finish(unsigned long, int, int);
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#endif /* __PSCI_PRIVATE_H__ */
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