1 /**************************************************************************//**
2  * @file     system_ARMCM23.c
3  * @brief    CMSIS Device System Source File for
4  *           ARMCM23 Device
5  * @version  V1.0.1
6  * @date     15. November 2019
7  ******************************************************************************/
8 /*
9  * Copyright (c) 2009-2019 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 (ARMCM23)
27   #include "ARMCM23.h"
28 #elif defined (ARMCM23_TZ)
29   #include "ARMCM23_TZ.h"
30 
31   #if defined (__ARM_FEATURE_CMSE) &&  (__ARM_FEATURE_CMSE == 3U)
32     #include "partition_ARMCM23.h"
33   #endif
34 #else
35   #error device not specified!
36 #endif
37 
38 /*----------------------------------------------------------------------------
39   Define clocks
40  *----------------------------------------------------------------------------*/
41 #define  XTAL            (50000000UL)     /* Oscillator frequency */
42 
43 #define  SYSTEM_CLOCK    (XTAL / 2U)
44 
45 /*----------------------------------------------------------------------------
46   Exception / Interrupt Vector table
47  *----------------------------------------------------------------------------*/
48 extern const VECTOR_TABLE_Type __VECTOR_TABLE[240];
49 
50 
51 /*----------------------------------------------------------------------------
52   System Core Clock Variable
53  *----------------------------------------------------------------------------*/
54 uint32_t SystemCoreClock = SYSTEM_CLOCK;  /* System Core Clock Frequency */
55 
56 
57 /*----------------------------------------------------------------------------
58   System Core Clock update function
59  *----------------------------------------------------------------------------*/
SystemCoreClockUpdate(void)60 void SystemCoreClockUpdate (void)
61 {
62   SystemCoreClock = SYSTEM_CLOCK;
63 }
64 
65 /*----------------------------------------------------------------------------
66   System initialization function
67  *----------------------------------------------------------------------------*/
SystemInit(void)68 void SystemInit (void)
69 {
70 
71 #if defined (__VTOR_PRESENT) && (__VTOR_PRESENT == 1U)
72   SCB->VTOR = (uint32_t) &(__VECTOR_TABLE[0]);
73 #endif
74 
75 #if defined (__ARM_FEATURE_CMSE) && (__ARM_FEATURE_CMSE == 3U)
76   TZ_SAU_Setup();
77 #endif
78 
79   SystemCoreClock = SYSTEM_CLOCK;
80 }
81