1 /*
2 * Copyright (c) 2017 Erwin Rol <erwin@erwinrol.com>
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 #include <zephyr/kernel.h>
8 #include <zephyr/device.h>
9 #include <stdio.h>
10 #include <string.h>
11
12 #include <zephyr/linker/linker-defs.h>
13
14 #define CCM_DATA_VAR_8_VAL 0x12
15 #define CCM_DATA_VAR_16_VAL 0x3456
16 #define CCM_DATA_VAR_32_VAL 0x789ABCDE
17
18 #define CCM_DATA_ARRAY_SIZE 5
19 #define CCM_BSS_ARRAY_SIZE 7
20 #define CCM_NOINIT_ARRAY_SIZE 11
21
22 #define CCM_DATA_ARRAY_VAL(i) (((i)+1)*0x11)
23
24 uint8_t __ccm_data_section ccm_data_var_8 = CCM_DATA_VAR_8_VAL;
25 uint16_t __ccm_data_section ccm_data_var_16 = CCM_DATA_VAR_16_VAL;
26 uint32_t __ccm_data_section ccm_data_var_32 = CCM_DATA_VAR_32_VAL;
27
28 uint8_t __ccm_data_section ccm_data_array[CCM_DATA_ARRAY_SIZE] = {
29 CCM_DATA_ARRAY_VAL(0),
30 CCM_DATA_ARRAY_VAL(1),
31 CCM_DATA_ARRAY_VAL(2),
32 CCM_DATA_ARRAY_VAL(3),
33 CCM_DATA_ARRAY_VAL(4),
34 };
35 uint8_t __ccm_bss_section ccm_bss_array[CCM_BSS_ARRAY_SIZE];
36 uint8_t __ccm_noinit_section ccm_noinit_array[CCM_NOINIT_ARRAY_SIZE];
37
print_array(const void * array,uint32_t size)38 void print_array(const void *array, uint32_t size)
39 {
40 int i;
41
42 for (i = 0; i < size; i++) {
43 printf("0x%02x ", ((const char *)array)[i]);
44 }
45 }
46
check_initial_var_values(void)47 void check_initial_var_values(void)
48 {
49 int i;
50 int check_failed = 0;
51
52 printf("\nChecking initial variable values: ... ");
53
54 if (ccm_data_var_8 != CCM_DATA_VAR_8_VAL) {
55 check_failed = 1;
56 printf("\nccm_data_var_8 incorrect: 0x%02x should be 0x%02x",
57 ccm_data_var_8, CCM_DATA_VAR_8_VAL);
58 }
59
60 if (ccm_data_var_16 != CCM_DATA_VAR_16_VAL) {
61 check_failed = 1;
62 printf("\nccm_data_var_16 incorrect: 0x%04x should be 0x%04x",
63 ccm_data_var_16, CCM_DATA_VAR_16_VAL);
64 }
65
66 if (ccm_data_var_32 != CCM_DATA_VAR_32_VAL) {
67 check_failed = 1;
68 printf("\nccm_data_var_32 incorrect: 0x%08x should be 0x%08x",
69 ccm_data_var_32, CCM_DATA_VAR_32_VAL);
70 }
71
72 for (i = 0; i < CCM_DATA_ARRAY_SIZE; i++) {
73 if (ccm_data_array[i] != CCM_DATA_ARRAY_VAL(i)) {
74 check_failed = 1;
75 printf("\nccm_data_array[%d] incorrect: "
76 "0x%02x should be 0x%02x",
77 i, ccm_data_array[i], CCM_DATA_ARRAY_VAL(i));
78 }
79 }
80
81 for (i = 0; i < CCM_BSS_ARRAY_SIZE; i++) {
82 if (ccm_bss_array[i] != 0x00) {
83 check_failed = 1;
84 printf("\nccm_bss_array[%d] incorrect: "
85 "0x%02x should be 0x00",
86 i, ccm_bss_array[i]);
87 }
88 }
89
90 if (!check_failed) {
91 printf("PASSED\n");
92 }
93 }
94
print_var_values(void)95 void print_var_values(void)
96 {
97 printf("ccm_data_var_8 addr: %p value: 0x%02x\n",
98 &ccm_data_var_8, ccm_data_var_8);
99 printf("ccm_data_var_16 addr: %p value: 0x%04x\n",
100 &ccm_data_var_16, ccm_data_var_16);
101 printf("ccm_data_var_32 addr: %p value: 0x%08x\n",
102 &ccm_data_var_32, ccm_data_var_32);
103 printf("ccm_data_array addr: %p size: %d value:\n\t",
104 ccm_data_array, (int)sizeof(ccm_data_array));
105 print_array(ccm_data_array, sizeof(ccm_data_array));
106 printf("\nccm_bss_array addr: %p size: %d value:\n\t",
107 ccm_bss_array, (int)sizeof(ccm_bss_array));
108 print_array(ccm_bss_array, sizeof(ccm_bss_array));
109 printf("\nccm_noinit_array addr: %p size: %d value:\n\t",
110 ccm_noinit_array, (int)sizeof(ccm_noinit_array));
111 print_array(ccm_noinit_array, sizeof(ccm_noinit_array));
112 printf("\n");
113 }
114
main(void)115 int main(void)
116 {
117 printf("\nCCM (Core Coupled Memory) usage example\n\n");
118
119 printf("The total used CCM area : [%p, %p)\n",
120 &__ccm_start, &__ccm_end);
121 printf("Zero initialized BSS area : [%p, %p)\n",
122 &__ccm_bss_start, &__ccm_bss_end);
123 printf("Uninitialized NOINIT area : [%p, %p)\n",
124 &__ccm_noinit_start, &__ccm_noinit_end);
125 printf("Initialised DATA area : [%p, %p)\n",
126 &__ccm_data_start, &__ccm_data_end);
127 printf("Start of DATA in FLASH : %p\n",
128 &__ccm_data_rom_start);
129
130 check_initial_var_values();
131
132 printf("\nInitial variable values:\n");
133 print_var_values();
134
135 ccm_data_var_8 = ~CCM_DATA_VAR_8_VAL;
136 ccm_data_var_16 = ~CCM_DATA_VAR_16_VAL;
137 ccm_data_var_32 = ~CCM_DATA_VAR_32_VAL;
138
139 (void)memset(ccm_data_array, 0xAA, sizeof(ccm_data_array));
140 (void)memset(ccm_bss_array, 0xBB, sizeof(ccm_bss_array));
141 (void)memset(ccm_noinit_array, 0xCC, sizeof(ccm_noinit_array));
142
143 printf("\nVariable values after writing:\n");
144 print_var_values();
145
146 printf("\nExample end\n");
147 return 0;
148 }
149
