blob: 8cd888641b76fd93e4f7c24c09e12237d2b6127e [file] [log] [blame]
/*
* Copyright (c) 2017 Erwin Rol <erwin@erwinrol.com>
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr/kernel.h>
#include <zephyr/device.h>
#include <stdio.h>
#include <string.h>
#include <zephyr/linker/linker-defs.h>
#define CCM_DATA_VAR_8_VAL 0x12
#define CCM_DATA_VAR_16_VAL 0x3456
#define CCM_DATA_VAR_32_VAL 0x789ABCDE
#define CCM_DATA_ARRAY_SIZE 5
#define CCM_BSS_ARRAY_SIZE 7
#define CCM_NOINIT_ARRAY_SIZE 11
#define CCM_DATA_ARRAY_VAL(i) (((i)+1)*0x11)
uint8_t __ccm_data_section ccm_data_var_8 = CCM_DATA_VAR_8_VAL;
uint16_t __ccm_data_section ccm_data_var_16 = CCM_DATA_VAR_16_VAL;
uint32_t __ccm_data_section ccm_data_var_32 = CCM_DATA_VAR_32_VAL;
uint8_t __ccm_data_section ccm_data_array[CCM_DATA_ARRAY_SIZE] = {
CCM_DATA_ARRAY_VAL(0),
CCM_DATA_ARRAY_VAL(1),
CCM_DATA_ARRAY_VAL(2),
CCM_DATA_ARRAY_VAL(3),
CCM_DATA_ARRAY_VAL(4),
};
uint8_t __ccm_bss_section ccm_bss_array[CCM_BSS_ARRAY_SIZE];
uint8_t __ccm_noinit_section ccm_noinit_array[CCM_NOINIT_ARRAY_SIZE];
void print_array(const void *array, uint32_t size)
{
int i;
for (i = 0; i < size; i++) {
printf("0x%02x ", ((const char *)array)[i]);
}
}
void check_initial_var_values(void)
{
int i;
int check_failed = 0;
printf("\nChecking initial variable values: ... ");
if (ccm_data_var_8 != CCM_DATA_VAR_8_VAL) {
check_failed = 1;
printf("\nccm_data_var_8 incorrect: 0x%02x should be 0x%02x",
ccm_data_var_8, CCM_DATA_VAR_8_VAL);
}
if (ccm_data_var_16 != CCM_DATA_VAR_16_VAL) {
check_failed = 1;
printf("\nccm_data_var_16 incorrect: 0x%04x should be 0x%04x",
ccm_data_var_16, CCM_DATA_VAR_16_VAL);
}
if (ccm_data_var_32 != CCM_DATA_VAR_32_VAL) {
check_failed = 1;
printf("\nccm_data_var_32 incorrect: 0x%08x should be 0x%08x",
ccm_data_var_32, CCM_DATA_VAR_32_VAL);
}
for (i = 0; i < CCM_DATA_ARRAY_SIZE; i++) {
if (ccm_data_array[i] != CCM_DATA_ARRAY_VAL(i)) {
check_failed = 1;
printf("\nccm_data_array[%d] incorrect: "
"0x%02x should be 0x%02x",
i, ccm_data_array[i], CCM_DATA_ARRAY_VAL(i));
}
}
for (i = 0; i < CCM_BSS_ARRAY_SIZE; i++) {
if (ccm_bss_array[i] != 0x00) {
check_failed = 1;
printf("\nccm_bss_array[%d] incorrect: "
"0x%02x should be 0x00",
i, ccm_bss_array[i]);
}
}
if (!check_failed) {
printf("PASSED\n");
}
}
void print_var_values(void)
{
printf("ccm_data_var_8 addr: %p value: 0x%02x\n",
&ccm_data_var_8, ccm_data_var_8);
printf("ccm_data_var_16 addr: %p value: 0x%04x\n",
&ccm_data_var_16, ccm_data_var_16);
printf("ccm_data_var_32 addr: %p value: 0x%08x\n",
&ccm_data_var_32, ccm_data_var_32);
printf("ccm_data_array addr: %p size: %d value:\n\t",
ccm_data_array, (int)sizeof(ccm_data_array));
print_array(ccm_data_array, sizeof(ccm_data_array));
printf("\nccm_bss_array addr: %p size: %d value:\n\t",
ccm_bss_array, (int)sizeof(ccm_bss_array));
print_array(ccm_bss_array, sizeof(ccm_bss_array));
printf("\nccm_noinit_array addr: %p size: %d value:\n\t",
ccm_noinit_array, (int)sizeof(ccm_noinit_array));
print_array(ccm_noinit_array, sizeof(ccm_noinit_array));
printf("\n");
}
int main(void)
{
printf("\nCCM (Core Coupled Memory) usage example\n\n");
printf("The total used CCM area : [%p, %p)\n",
&__ccm_start, &__ccm_end);
printf("Zero initialized BSS area : [%p, %p)\n",
&__ccm_bss_start, &__ccm_bss_end);
printf("Uninitialized NOINIT area : [%p, %p)\n",
&__ccm_noinit_start, &__ccm_noinit_end);
printf("Initialised DATA area : [%p, %p)\n",
&__ccm_data_start, &__ccm_data_end);
printf("Start of DATA in FLASH : %p\n",
&__ccm_data_rom_start);
check_initial_var_values();
printf("\nInitial variable values:\n");
print_var_values();
ccm_data_var_8 = ~CCM_DATA_VAR_8_VAL;
ccm_data_var_16 = ~CCM_DATA_VAR_16_VAL;
ccm_data_var_32 = ~CCM_DATA_VAR_32_VAL;
(void)memset(ccm_data_array, 0xAA, sizeof(ccm_data_array));
(void)memset(ccm_bss_array, 0xBB, sizeof(ccm_bss_array));
(void)memset(ccm_noinit_array, 0xCC, sizeof(ccm_noinit_array));
printf("\nVariable values after writing:\n");
print_var_values();
printf("\nExample end\n");
return 0;
}