try another way to check for unpriv access

Author: Oren Cohen

core/vmpu/src/mpu_armv8m/vmpu_armv8m_unpriv_access.c

@@ -95,7 +95,9 @@ uint32_t vmpu_unpriv_access(uint32_t addr, uint32_t size, uint32_t data)
 {
     unsigned int tries = 0;
     while(1) {
-        if ((vmpu_unpriv_test_range(addr, UVISOR_UNPRIV_ACCESS_SIZE(size)) & (TT_RESP_NSRW_Msk | TT_RESP_SRVALID_Msk)) == (TT_RESP_NSRW_Msk | TT_RESP_SRVALID_Msk)) {
+        //if ((vmpu_unpriv_test_range(addr, UVISOR_UNPRIV_ACCESS_SIZE(size)) & (TT_RESP_NSRW_Msk | TT_RESP_SRVALID_Msk)) == (TT_RESP_NSRW_Msk | TT_RESP_SRVALID_Msk)) {
+        //this should be slower substantualy
+        if (vmpu_buffer_access_is_ok(g_active_box, addr, UVISOR_UNPRIV_ACCESS_SIZE(size))){
             switch(size) {
                 case UVISOR_UNPRIV_ACCESS_READ(1):
                     return *((uint8_t *) addr);