124 lines
2.7 KiB
C
124 lines
2.7 KiB
C
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/*
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* Copyright (c) 2006-2019, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2019-10-28 tyx the first version.
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*/
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#include <rtthread.h>
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extern void TZ_InitContextSystem_S(void);
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extern rt_uint32_t TZ_AllocModuleContext_S (rt_uint32_t module);
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extern rt_uint32_t TZ_FreeModuleContext_S(rt_uint32_t id);
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extern rt_uint32_t TZ_LoadContext_S(rt_uint32_t id);
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extern rt_uint32_t TZ_StoreContext_S(rt_uint32_t id);
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extern int tzcall(int id, rt_ubase_t arg0, rt_ubase_t arg1, rt_ubase_t arg2);
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#define TZ_INIT_CONTEXT_ID (0x1001)
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#define TZ_ALLOC_CONTEXT_ID (0x1002)
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#define TZ_FREE_CONTEXT_ID (0x1003)
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rt_ubase_t rt_trustzone_current_context;
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#if defined(__CC_ARM)
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static __inline rt_uint32_t __get_IPSR(void)
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{
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register rt_uint32_t result __asm("ipsr");
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return(result);
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}
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#elif defined(__CLANG_ARM)
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__attribute__((always_inline)) static __inline rt_uint32_t __get_IPSR(void)
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{
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rt_uint32_t result;
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__asm volatile ("MRS %0, ipsr" : "=r" (result) );
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return(result);
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}
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#elif defined(__IAR_SYSTEMS_ICC__)
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_Pragma("inline=forced") static inline int __get_IPSR(int value)
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{
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rt_uint32_t result;
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asm("MRS %0, ipsr" : "=r"(result));
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return result;
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}
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#elif defined(__GNUC__)
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__attribute__((always_inline)) static inline rt_uint32_t __get_IPSR(void)
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{
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rt_uint32_t result;
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__asm volatile ("MRS %0, ipsr" : "=r" (result) );
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return(result);
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}
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#endif
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void rt_trustzone_init(void)
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{
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static rt_uint8_t _init;
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if (_init)
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return;
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tzcall(TZ_INIT_CONTEXT_ID, 0, 0, 0);
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_init = 1;
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}
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rt_err_t rt_trustzone_enter(rt_ubase_t module)
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{
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rt_trustzone_init();
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if (tzcall(TZ_ALLOC_CONTEXT_ID, module, 0, 0))
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{
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return RT_EOK;
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}
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return -RT_ERROR;
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}
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rt_err_t rt_trustzone_exit(void)
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{
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tzcall(TZ_FREE_CONTEXT_ID, 0, 0, 0);
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return RT_EOK;
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}
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void rt_trustzone_context_store(rt_ubase_t context)
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{
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TZ_StoreContext_S(context);
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}
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void rt_trustzone_context_load(rt_ubase_t context)
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{
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TZ_LoadContext_S(context);
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}
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int rt_secure_svc_handle(int svc_id, rt_ubase_t arg0, rt_ubase_t arg1, rt_ubase_t arg2)
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{
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rt_ubase_t tmp;
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int res = 0;
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switch (svc_id)
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{
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case TZ_INIT_CONTEXT_ID:
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TZ_InitContextSystem_S();
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break;
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case TZ_ALLOC_CONTEXT_ID:
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res = TZ_AllocModuleContext_S(arg0);
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if (res <= 0)
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{
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rt_kprintf("Alloc Context Failed\n");
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}
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else
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{
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rt_trustzone_current_context = res;
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TZ_LoadContext_S(res);
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}
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break;
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case TZ_FREE_CONTEXT_ID:
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TZ_FreeModuleContext_S(rt_trustzone_current_context);
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rt_trustzone_current_context = 0;
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break;
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}
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return res;
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}
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