int vIRQ_GetLevel(void)
{
/* if uVisor is disabled we use the standard priority levels */
if (__uvisor_mode == 0) {
/* check if an IRQn is active (an ISR is being served) */
uint32_t ipsr = __get_IPSR();
int irqn = (int) (ipsr & 0x1FF) - NVIC_USER_IRQ_OFFSET;
if (irqn >= NVIC_NUM_VECTORS || !ipsr || !NVIC_GetActive((IRQn_Type) irqn)) {
return -1;
}
/* return the priority level of the active IRQ */
/* if we are in a system interrupt we do not provide the actual
* priority level, which is usually negative, since we already use -1
* for stating "no IRQn is active". This is consistent with the
* behavior of the actual uVisor-managed API, as this call will never
* come from a system interrupt. The caller can still use this
* information to assess that an IRQn is actually active (0 = lowest
* priority) */
if (irqn < 0) {
return 0;
}
else {
return NVIC_GetPriority((IRQn_Type) irqn);
}
}
else {
return UVISOR_SVC(UVISOR_SVC_ID_IRQ_LEVEL_GET, "");
}
}
static void boxes_init(void)
{
/* Tell uVisor to call the uVisor lib box_init function for each box with
* each box's uVisor lib config. */
/* This must be called from unprivileged mode in order for the recursive
* gateway chaining to work properly. */
UVISOR_SVC(UVISOR_SVC_ID_BOX_INIT_FIRST, "");
}
void vIRQ_SetPriority(uint32_t irqn, uint32_t priority)
{
if(__uvisor_mode == 0) {
NVIC_SetPriority((IRQn_Type) irqn, priority);
}
else {
UVISOR_SVC(UVISOR_SVC_ID_IRQ_PRIO_SET, "", irqn, priority);
}
}
uint32_t vIRQ_GetPendingIRQ(uint32_t irqn)
{
if(__uvisor_mode == 0) {
return NVIC_GetPendingIRQ((IRQn_Type) irqn);
}
else {
return UVISOR_SVC(UVISOR_SVC_ID_IRQ_PEND_GET, "", irqn);
}
}
void vIRQ_SetPendingIRQ(uint32_t irqn)
{
if(__uvisor_mode == 0) {
NVIC_SetPendingIRQ((IRQn_Type) irqn);
}
else {
UVISOR_SVC(UVISOR_SVC_ID_IRQ_PEND_SET, "", irqn);
}
}
void vIRQ_DisableIRQ(uint32_t irqn)
{
if(__uvisor_mode == 0) {
NVIC_DisableIRQ((IRQn_Type) irqn);
}
else {
UVISOR_SVC(UVISOR_SVC_ID_IRQ_DISABLE, "", irqn);
}
}
uint32_t vIRQ_GetVector(uint32_t irqn)
{
if(__uvisor_mode == 0) {
return NVIC_GetVector((IRQn_Type) irqn);
}
else {
return UVISOR_SVC(UVISOR_SVC_ID_ISR_GET, "", irqn);
}
}
void vIRQ_SetVectorX(uint32_t irqn, uint32_t vector, uint32_t flag)
{
if(__uvisor_mode == 0) {
NVIC_SetVector((IRQn_Type) irqn, vector);
}
else {
UVISOR_SVC(UVISOR_SVC_ID_ISR_SET, "", irqn, vector, flag);
}
}
uint32_t vIRQ_GetPriority(uint32_t irqn)
{
if(__uvisor_mode == 0) {
return NVIC_GetPriority((IRQn_Type) irqn);
}
else {
return UVISOR_SVC(UVISOR_SVC_ID_IRQ_PRIO_GET, "", irqn);
}
}
void uvisor_error(THaltUserError reason)
{
UVISOR_SVC(UVISOR_SVC_ID_HALT_USER_ERR, "", reason);
}
void debug_die(void)
{
UVISOR_SVC(UVISOR_SVC_ID_GET(error), "", DEBUG_BOX_HALT);
}