soc: change region in mpu test
Previously, the test uses region 3 for the illegal access test
(0x60000000 - 0x7fffffff). This caused issues with there being
peripherals located in that memory range. Change to use region 4
(0x8000000 - 0x9fffffff) instead).
@@ -11,17 +11,24 @@ volatile static int RTC_NOINIT_ATTR access = 0;
static void trigger_illegal_access(void)
{
access = 0;
- intptr_t addr = 0x60000000;
+ intptr_t addr = 0x80000000; // MPU region 4
volatile int __attribute__((unused)) val = 0;
+ // Marked as an illegal access region at startup in ESP32, ESP32S2.
+ // Make accessible temporarily.
+ mpu_hal_set_region_access(4, MPU_REGION_RW);
+
val = *((int*) addr);
++access;
TEST_ASSERT_EQUAL(1, access);
printf("Sucessfully accessed location %p\r\n", (void*)addr);
- mpu_hal_set_region_access(3, MPU_REGION_ILLEGAL); // 0x60000000
+ // Make access to region illegal again.
+ mpu_hal_set_region_access(4, MPU_REGION_ILLEGAL);
++access;
+ // Since access to region is illegal, this should fail (causing a reset), and the increment
+ // to access count is not performed.
val = *((int*) addr);
++access;
}
