92 lines
2.5 KiB
C
92 lines
2.5 KiB
C
/*
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* Copyright (c) 2017-2018, 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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#ifndef __ASSEMBLY__
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#include <spinlock.h>
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#include <sp_res_desc.h>
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#include <stdint.h>
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#include <xlat_tables_v2.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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xlat_ctx_t *xlat_ctx_handle;
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struct sp_res_desc rd;
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sp_state_t state;
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spinlock_t state_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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} sp_context_t;
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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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/* Functions related to the translation tables management */
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xlat_ctx_t *spm_sp_xlat_context_alloc(void);
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void sp_map_memory_regions(sp_context_t *sp_ctx);
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int32_t spm_memory_attributes_get_smc_handler(sp_context_t *sp_ctx,
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uintptr_t base_va);
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int spm_memory_attributes_set_smc_handler(sp_context_t *sp_ctx,
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u_register_t page_address,
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u_register_t pages_count,
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u_register_t smc_attributes);
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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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#endif /* __ASSEMBLY__ */
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#endif /* SPM_PRIVATE_H */
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