1 files changed, 124 insertions, 0 deletions
diff --git a/bsps/powerpc/include/bsp/irq_supp.h b/bsps/powerpc/include/bsp/irq_supp.h
new file mode 100644
index 0000000000..65af48c87f
--- /dev/null
+++ b/bsps/powerpc/include/bsp/irq_supp.h
@@ -0,0 +1,124 @@
+/*
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.org/license/LICENSE.
+ */
+
+#ifndef IRQ_SHARED_IRQ_C_GLUE_H
+#define IRQ_SHARED_IRQ_C_GLUE_H
+/*
+ *  This header describes the routines that are needed by the shared
+ *  version of 'irq.c' (implementing the RTEMS irq API). They
+ *  must be provided by the BSP.
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.org/license/LICENSE.
+ *
+ */
+
+#ifndef BSP_SHARED_HANDLER_SUPPORT
+#define BSP_SHARED_HANDLER_SUPPORT      1
+#endif
+
+#include <rtems.h>
+#include <rtems/irq.h>
+
+#include <bsp/vectors.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * PIC-independent functions to enable/disable interrupt lines at
+ * the pic.
+ *
+ * NOTE: the routines must ignore requests for enabling/disabling
+ *       interrupts that are outside of the range handled by the
+ *       PIC(s).
+ */
+extern void BSP_enable_irq_at_pic(const rtems_irq_number irqLine);
+/*
+ * RETURNS: nonzero (> 0 ) if irq was enabled originally, zero if irq
+ *          was off and negative value if there was an error.
+ */
+extern int  BSP_disable_irq_at_pic(const rtems_irq_number irqLine);
+
+/*
+ * Initialize the PIC.
+ */
+extern int  BSP_setup_the_pic(rtems_irq_global_settings* config);
+
+/* IRQ dispatcher to be defined by the PIC driver; note that it MUST
+ * implement shared interrupts.
+ * Note also that the exception frame passed to this handler is not very
+ * meaningful. Only the volatile registers and vector info are stored.
+ *
+ *******************************************************************
+ * The routine must return zero if the interrupt was handled. If a
+ * nonzero value is returned the dispatcher may panic and flag an
+ * uncaught exception.
+ *******************************************************************
+ */
+int C_dispatch_irq_handler (BSP_Exception_frame *frame, unsigned int excNum);
+
+/*
+ * Snippet to be used by PIC drivers and by bsp_irq_dispatch_list
+ * traverses list of shared handlers for a given interrupt
+ *
+ */
+
+static inline void
+bsp_irq_dispatch_list_base(
+  rtems_irq_connect_data *tbl,
+  unsigned irq,
+  rtems_irq_hdl sentinel
+)
+{
+	rtems_irq_connect_data* vchain;
+	for( vchain = &tbl[irq];
+			((intptr_t)vchain != -1 && vchain->hdl != sentinel);
+			vchain = (rtems_irq_connect_data*)vchain->next_handler )
+	{
+          vchain->hdl(vchain->handle);
+	}
+}
+
+
+/*
+ * Snippet to be used by PIC drivers;
+ * enables interrupts, traverses list of
+ * shared handlers for a given interrupt
+ * and restores original irq level
+ *
+ * Note that _ISR_Get_level() & friends are preferable to
+ * manipulating MSR directly.
+ */
+
+static inline void
+bsp_irq_dispatch_list(
+  rtems_irq_connect_data *tbl,
+  unsigned irq,
+  rtems_irq_hdl sentinel
+)
+{
+	register uint32_t l_orig;
+
+	l_orig = _ISR_Get_level();
+
+	/* Enable all interrupts */
+	_ISR_Set_level(0);
+
+
+        bsp_irq_dispatch_list_base( tbl, irq, sentinel );
+
+	/* Restore original level */
+	_ISR_Set_level(l_orig);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif