bsps: Shared ARMv7-M interrupt support

1 files changed, 63 insertions, 0 deletions

diff --git a/c/src/lib/libbsp/arm/shared/armv7m/irq/armv7m-irq.c b/c/src/lib/libbsp/arm/shared/armv7m/irq/armv7m-irq.c
new file mode 100644
index 0000000000..901034c6d5
--- /dev/null
+++ b/c/src/lib/libbsp/arm/shared/armv7m/irq/armv7m-irq.c
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2011-2012 Sebastian Huber.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Obere Lagerstr. 30
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.com/license/LICENSE.
+ */
+
+#include <rtems/score/armv7m.h>
+
+#include <bsp.h>
+#include <bsp/irq.h>
+#include <bsp/irq-generic.h>
+#include <bsp/linker-symbols.h>
+#include <bsp/armv7m-irq.h>
+
+#ifdef ARM_MULTILIB_ARCH_V7M
+
+rtems_status_code bsp_interrupt_vector_enable(rtems_vector_number vector)
+{
+  _ARMV7M_NVIC_Set_enable((int) vector);
+
+  return RTEMS_SUCCESSFUL;
+}
+
+rtems_status_code bsp_interrupt_vector_disable(rtems_vector_number vector)
+{
+  _ARMV7M_NVIC_Clear_enable((int) vector);
+
+  return RTEMS_SUCCESSFUL;
+}
+
+rtems_status_code bsp_interrupt_facility_initialize(void)
+{
+  int i;
+  ARMV7M_Exception_handler *vector_table =
+    (ARMV7M_Exception_handler *) bsp_vector_table_begin;
+
+  memcpy(
+    vector_table,
+    bsp_start_vector_table_begin,
+    (size_t) bsp_vector_table_size
+  );
+
+  for (i = BSP_INTERRUPT_VECTOR_MIN; i <= BSP_INTERRUPT_VECTOR_MAX; ++i) {
+    vector_table [ARMV7M_VECTOR_IRQ(i)] = _ARMV7M_NVIC_Interrupt_dispatch;
+    _ARMV7M_NVIC_Clear_enable(i);
+    _ARMV7M_NVIC_Clear_pending(i);
+    _ARMV7M_NVIC_Set_priority(i, ARMV7M_EXCEPTION_PRIORITY_LOWEST);
+  }
+
+  _ARMV7M_SCB->vtor = vector_table;
+
+  return RTEMS_SUCCESSFUL;
+}
+
+#endif /* ARM_MULTILIB_ARCH_V7M */