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d5dfdeb65f
NOTE: __ASSEMBLY__ macro is now deprecated in favor of __ASSEMBLER__. All common C compilers predefine a macro called __ASSEMBLER__ when preprocessing a .S file. There is no reason for TF-A to define it's own __ASSEMBLY__ macro for this purpose instead. To unify code with the export headers (which use __ASSEMBLER__ to avoid one extra dependency), let's deprecate __ASSEMBLY__ and switch the code base over to the predefined standard. Change-Id: Id7d0ec8cf330195da80499c68562b65cb5ab7417 Signed-off-by: Julius Werner <jwerner@chromium.org>
119 lines
3.7 KiB
C
119 lines
3.7 KiB
C
/*
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* Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef SPM_PRIVATE_H
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#define SPM_PRIVATE_H
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#include <context.h>
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/*******************************************************************************
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* Constants that allow assembler code to preserve callee-saved registers of the
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* C runtime context while performing a security state switch.
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******************************************************************************/
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#define SP_C_RT_CTX_X19 0x0
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#define SP_C_RT_CTX_X20 0x8
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#define SP_C_RT_CTX_X21 0x10
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#define SP_C_RT_CTX_X22 0x18
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#define SP_C_RT_CTX_X23 0x20
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#define SP_C_RT_CTX_X24 0x28
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#define SP_C_RT_CTX_X25 0x30
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#define SP_C_RT_CTX_X26 0x38
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#define SP_C_RT_CTX_X27 0x40
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#define SP_C_RT_CTX_X28 0x48
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#define SP_C_RT_CTX_X29 0x50
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#define SP_C_RT_CTX_X30 0x58
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#define SP_C_RT_CTX_SIZE 0x60
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#define SP_C_RT_CTX_ENTRIES (SP_C_RT_CTX_SIZE >> DWORD_SHIFT)
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/* Value returned by spm_sp_synchronous_entry() when a partition is preempted */
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#define SPM_SECURE_PARTITION_PREEMPTED U(0x1234)
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#ifndef __ASSEMBLER__
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#include <stdint.h>
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#include <lib/xlat_tables/xlat_tables_v2.h>
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#include <lib/spinlock.h>
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#include <services/sp_res_desc.h>
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typedef enum sp_state {
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SP_STATE_RESET = 0,
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SP_STATE_IDLE,
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SP_STATE_BUSY
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} sp_state_t;
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typedef struct sp_context {
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/* 1 if the partition is present, 0 otherwise */
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int is_present;
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/* Location of the image in physical memory */
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unsigned long long image_base;
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size_t image_size;
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uint64_t c_rt_ctx;
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cpu_context_t cpu_ctx;
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struct sp_res_desc rd;
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/* Translation tables context */
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xlat_ctx_t *xlat_ctx_handle;
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spinlock_t xlat_ctx_lock;
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sp_state_t state;
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spinlock_t state_lock;
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unsigned int request_count;
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spinlock_t request_count_lock;
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/* Base and size of the shared SPM<->SP buffer */
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uintptr_t spm_sp_buffer_base;
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size_t spm_sp_buffer_size;
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spinlock_t spm_sp_buffer_lock;
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} sp_context_t;
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/* Functions used to enter/exit a Secure Partition synchronously */
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uint64_t spm_sp_synchronous_entry(sp_context_t *sp_ctx, int can_preempt);
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__dead2 void spm_sp_synchronous_exit(uint64_t rc);
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/* Assembly helpers */
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uint64_t spm_secure_partition_enter(uint64_t *c_rt_ctx);
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void __dead2 spm_secure_partition_exit(uint64_t c_rt_ctx, uint64_t ret);
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/* Secure Partition setup */
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void spm_sp_setup(sp_context_t *sp_ctx);
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/* Secure Partition state management helpers */
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void sp_state_set(sp_context_t *sp_ptr, sp_state_t state);
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void sp_state_wait_switch(sp_context_t *sp_ptr, sp_state_t from, sp_state_t to);
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int sp_state_try_switch(sp_context_t *sp_ptr, sp_state_t from, sp_state_t to);
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/* Functions to keep track of the number of active requests per SP */
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void spm_sp_request_increase(sp_context_t *sp_ctx);
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void spm_sp_request_decrease(sp_context_t *sp_ctx);
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int spm_sp_request_increase_if_zero(sp_context_t *sp_ctx);
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/* Functions related to the shim layer translation tables */
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void spm_exceptions_xlat_init_context(void);
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uint64_t *spm_exceptions_xlat_get_base_table(void);
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/* Functions related to the translation tables management */
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void spm_sp_xlat_context_alloc(sp_context_t *sp_ctx);
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void sp_map_memory_regions(sp_context_t *sp_ctx);
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/* Functions to handle Secure Partition contexts */
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void spm_cpu_set_sp_ctx(unsigned int linear_id, sp_context_t *sp_ctx);
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sp_context_t *spm_cpu_get_sp_ctx(unsigned int linear_id);
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sp_context_t *spm_sp_get_by_uuid(const uint32_t (*svc_uuid)[4]);
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/* Functions to manipulate response and requests buffers */
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int spm_response_add(uint16_t client_id, uint16_t handle, uint32_t token,
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u_register_t x1, u_register_t x2, u_register_t x3);
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int spm_response_get(uint16_t client_id, uint16_t handle, uint32_t token,
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u_register_t *x1, u_register_t *x2, u_register_t *x3);
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#endif /* __ASSEMBLER__ */
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#endif /* SPM_PRIVATE_H */
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