84 lines
2.6 KiB
C
84 lines
2.6 KiB
C
/*
|
|
* Copyright (c) 2013-2018, ARM Limited and Contributors. All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
#ifndef CONTEXT_MGMT_H
|
|
#define CONTEXT_MGMT_H
|
|
|
|
#include <assert.h>
|
|
#include <context.h>
|
|
#include <stdint.h>
|
|
|
|
#include <arch.h>
|
|
|
|
/*******************************************************************************
|
|
* Forward declarations
|
|
******************************************************************************/
|
|
struct entry_point_info;
|
|
|
|
/*******************************************************************************
|
|
* Function & variable prototypes
|
|
******************************************************************************/
|
|
void cm_init(void);
|
|
void *cm_get_context_by_index(unsigned int cpu_idx,
|
|
unsigned int security_state);
|
|
void cm_set_context_by_index(unsigned int cpu_idx,
|
|
void *context,
|
|
unsigned int security_state);
|
|
void *cm_get_context(uint32_t security_state);
|
|
void cm_set_context(void *context, uint32_t security_state);
|
|
void cm_init_my_context(const struct entry_point_info *ep);
|
|
void cm_init_context_by_index(unsigned int cpu_idx,
|
|
const struct entry_point_info *ep);
|
|
void cm_setup_context(cpu_context_t *ctx, const entry_point_info_t *ep);
|
|
void cm_prepare_el3_exit(uint32_t security_state);
|
|
|
|
#ifdef __aarch64__
|
|
void cm_el1_sysregs_context_save(uint32_t security_state);
|
|
void cm_el1_sysregs_context_restore(uint32_t security_state);
|
|
void cm_set_elr_el3(uint32_t security_state, uintptr_t entrypoint);
|
|
void cm_set_elr_spsr_el3(uint32_t security_state,
|
|
uintptr_t entrypoint, uint32_t spsr);
|
|
void cm_write_scr_el3_bit(uint32_t security_state,
|
|
uint32_t bit_pos,
|
|
uint32_t value);
|
|
void cm_set_next_eret_context(uint32_t security_state);
|
|
uint32_t cm_get_scr_el3(uint32_t security_state);
|
|
|
|
/* Inline definitions */
|
|
|
|
/*******************************************************************************
|
|
* This function is used to program the context that's used for exception
|
|
* return. This initializes the SP_EL3 to a pointer to a 'cpu_context' set for
|
|
* the required security state
|
|
******************************************************************************/
|
|
static inline void cm_set_next_context(void *context)
|
|
{
|
|
#if ENABLE_ASSERTIONS
|
|
uint64_t sp_mode;
|
|
|
|
/*
|
|
* Check that this function is called with SP_EL0 as the stack
|
|
* pointer
|
|
*/
|
|
__asm__ volatile("mrs %0, SPSel\n"
|
|
: "=r" (sp_mode));
|
|
|
|
assert(sp_mode == MODE_SP_EL0);
|
|
#endif /* ENABLE_ASSERTIONS */
|
|
|
|
__asm__ volatile("msr spsel, #1\n"
|
|
"mov sp, %0\n"
|
|
"msr spsel, #0\n"
|
|
: : "r" (context));
|
|
}
|
|
|
|
#else
|
|
void *cm_get_next_context(void);
|
|
void cm_set_next_context(void *context);
|
|
#endif /* __aarch64__ */
|
|
|
|
#endif /* CONTEXT_MGMT_H */
|