1 /**************************************************************************//**
2  * @file     system_ARMCM33.c
3  * @brief    CMSIS Device System Source File for
4  *           ARMCM33 Device
5  * @version  V2.0.0
6  * @date     06. Aril 2023
7  ******************************************************************************/
8 /*
9  * Copyright (c) 2009-2023 Arm Limited. All rights reserved.
10  *
11  * SPDX-License-Identifier: Apache-2.0
12  *
13  * Licensed under the Apache License, Version 2.0 (the License); you may
14  * not use this file except in compliance with the License.
15  * You may obtain a copy of the License at
16  *
17  * www.apache.org/licenses/LICENSE-2.0
18  *
19  * Unless required by applicable law or agreed to in writing, software
20  * distributed under the License is distributed on an AS IS BASIS, WITHOUT
21  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
22  * See the License for the specific language governing permissions and
23  * limitations under the License.
24  */
25 
26 #if defined (ARMCM33)
27   #include "ARMCM33.h"
28   #if defined (__ARM_FEATURE_CMSE) &&  (__ARM_FEATURE_CMSE == 3U)
29     #include "partition_ARMCM33.h"
30   #endif
31 #else
32   #error device not specified!
33 #endif
34 
35 /*----------------------------------------------------------------------------
36   Define clocks
37  *----------------------------------------------------------------------------*/
38 #define  XTAL            (50000000UL)     /* Oscillator frequency */
39 
40 #define  SYSTEM_CLOCK    (XTAL / 2U)
41 
42 /*----------------------------------------------------------------------------
43   Exception / Interrupt Vector table
44  *----------------------------------------------------------------------------*/
45 extern const VECTOR_TABLE_Type __VECTOR_TABLE[496];
46 
47 
48 /*----------------------------------------------------------------------------
49   System Core Clock Variable
50  *----------------------------------------------------------------------------*/
51 uint32_t SystemCoreClock = SYSTEM_CLOCK;  /* System Core Clock Frequency */
52 
53 
54 /*----------------------------------------------------------------------------
55   System Core Clock update function
56  *----------------------------------------------------------------------------*/
SystemCoreClockUpdate(void)57 void SystemCoreClockUpdate (void)
58 {
59   SystemCoreClock = SYSTEM_CLOCK;
60 }
61 
62 /*----------------------------------------------------------------------------
63   System initialization function
64  *----------------------------------------------------------------------------*/
SystemInit(void)65 void SystemInit (void)
66 {
67 
68 #if defined (__VTOR_PRESENT) && (__VTOR_PRESENT == 1U)
69   SCB->VTOR = (uint32_t) &(__VECTOR_TABLE[0]);
70 #endif
71 
72 #if defined (__FPU_USED) && (__FPU_USED == 1U)
73   SCB->CPACR |= ((3U << 10U*2U) |           /* enable CP10 Full Access */
74                  (3U << 11U*2U)  );         /* enable CP11 Full Access */
75 #endif
76 
77 #ifdef UNALIGNED_SUPPORT_DISABLE
78   SCB->CCR |= SCB_CCR_UNALIGN_TRP_Msk;
79 #endif
80 
81 #if defined (__ARM_FEATURE_CMSE) && (__ARM_FEATURE_CMSE == 3U)
82   TZ_SAU_Setup();
83 #endif
84 
85   SystemCoreClock = SYSTEM_CLOCK;
86 }
87