aboutsummaryrefslogtreecommitdiff
path: root/drivers/arm/tzc/tzc400.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/arm/tzc/tzc400.c')
-rw-r--r--drivers/arm/tzc/tzc400.c105
1 files changed, 100 insertions, 5 deletions
diff --git a/drivers/arm/tzc/tzc400.c b/drivers/arm/tzc/tzc400.c
index 9798ed4e5f..9fc1578a1a 100644
--- a/drivers/arm/tzc/tzc400.c
+++ b/drivers/arm/tzc/tzc400.c
@@ -10,6 +10,7 @@
#include <common/debug.h>
#include <drivers/arm/tzc400.h>
#include <lib/mmio.h>
+#include <lib/utils_def.h>
#include "tzc_common_private.h"
@@ -70,6 +71,77 @@ DEFINE_TZC_COMMON_WRITE_REGION_ID_ACCESS(400, 400)
DEFINE_TZC_COMMON_CONFIGURE_REGION0(400)
DEFINE_TZC_COMMON_CONFIGURE_REGION(400)
+static void _tzc400_clear_it(uintptr_t base, uint32_t filter)
+{
+ mmio_write_32(base + INT_CLEAR, BIT_32(filter));
+}
+
+static uint32_t _tzc400_get_int_by_filter(uintptr_t base, uint32_t filter)
+{
+ return mmio_read_32(base + INT_STATUS) & BIT_32(filter);
+}
+
+#if DEBUG
+static unsigned long _tzc400_get_fail_address(uintptr_t base, uint32_t filter)
+{
+ unsigned long fail_address;
+
+ fail_address = mmio_read_32(base + FAIL_ADDRESS_LOW_OFF +
+ (filter * FILTER_OFFSET));
+#ifdef __aarch64__
+ fail_address += (unsigned long)mmio_read_32(base + FAIL_ADDRESS_HIGH_OFF +
+ (filter * FILTER_OFFSET)) << 32;
+#endif
+
+ return fail_address;
+}
+
+static uint32_t _tzc400_get_fail_id(uintptr_t base, uint32_t filter)
+{
+ return mmio_read_32(base + FAIL_ID + (filter * FILTER_OFFSET));
+}
+
+static uint32_t _tzc400_get_fail_control(uintptr_t base, uint32_t filter)
+{
+ return mmio_read_32(base + FAIL_CONTROL_OFF + (filter * FILTER_OFFSET));
+}
+
+static void _tzc400_dump_fail_filter(uintptr_t base, uint32_t filter)
+{
+ uint32_t control_fail;
+ uint32_t fail_id;
+ unsigned long address_fail;
+
+ address_fail = _tzc400_get_fail_address(base, filter);
+ ERROR("Illegal access to 0x%lx:\n", address_fail);
+
+ fail_id = _tzc400_get_fail_id(base, filter);
+ ERROR("\tFAIL_ID = 0x%x\n", fail_id);
+
+ control_fail = _tzc400_get_fail_control(base, filter);
+ if (((control_fail & BIT_32(FAIL_CONTROL_NS_SHIFT)) >> FAIL_CONTROL_NS_SHIFT) ==
+ FAIL_CONTROL_NS_NONSECURE) {
+ ERROR("\tNon-Secure\n");
+ } else {
+ ERROR("\tSecure\n");
+ }
+
+ if (((control_fail & BIT_32(FAIL_CONTROL_PRIV_SHIFT)) >> FAIL_CONTROL_PRIV_SHIFT) ==
+ FAIL_CONTROL_PRIV_PRIV) {
+ ERROR("\tPrivilege\n");
+ } else {
+ ERROR("\tUnprivilege\n");
+ }
+
+ if (((control_fail & BIT_32(FAIL_CONTROL_DIR_SHIFT)) >> FAIL_CONTROL_DIR_SHIFT) ==
+ FAIL_CONTROL_DIR_WRITE) {
+ ERROR("\tWrite\n");
+ } else {
+ ERROR("\tRead\n");
+ }
+}
+#endif /* DEBUG */
+
static unsigned int _tzc400_get_gate_keeper(uintptr_t base,
unsigned int filter)
{
@@ -108,11 +180,6 @@ void tzc400_set_action(unsigned int action)
assert(tzc400.base != 0U);
assert(action <= TZC_ACTION_ERR_INT);
- /*
- * - Currently no handler is provided to trap an error via interrupt
- * or exception.
- * - The interrupt action has not been tested.
- */
_tzc400_write_action(tzc400.base, action);
}
@@ -245,3 +312,31 @@ void tzc400_disable_filters(void)
for (filter = 0; filter < tzc400.num_filters; filter++)
_tzc400_set_gate_keeper(tzc400.base, filter, 0);
}
+
+int tzc400_it_handler(void)
+{
+ uint32_t filter;
+ uint32_t filter_it_pending = tzc400.num_filters;
+
+ assert(tzc400.base != 0U);
+
+ for (filter = 0U; filter < tzc400.num_filters; filter++) {
+ if (_tzc400_get_int_by_filter(tzc400.base, filter) != 0U) {
+ filter_it_pending = filter;
+ break;
+ }
+ }
+
+ if (filter_it_pending == tzc400.num_filters) {
+ ERROR("TZC-400: No interrupt pending!\n");
+ return -1;
+ }
+
+#if DEBUG
+ _tzc400_dump_fail_filter(tzc400.base, filter_it_pending);
+#endif
+
+ _tzc400_clear_it(tzc400.base, filter_it_pending);
+
+ return 0;
+}