2007-11-30 Till Straumann <strauman@slac.stanford.edu>

* shared/irq/irq.h, shared/irq/irq.c, shared/irq/irq_init.c,
	shared/irq/irq_supp.h (added):
	Removed 'is_processor_irq()' from irq.c; the BSP routines
	BSP_enable_irq_at_pic()/BSP_disable_irq_at_pic() are required
	to ignore processor irqs anyways. Removed
	all BSP-defined constants from irq.c. This makes irq.c (almost)
	binary-compatible among BSPs (ultimate goal is making 'shared'
	a library).
	Added a header (irq_supp.h) defining the interface between
	the generic interrupt manager (irq.c) and the routines it
	requires to be supplied by the BSP (eventually, these
	should go into rtems/irq.h).

c/src/lib/libbsp/powerpc/shared/irq/irq_supp.h

@@ -0,0 +1,42 @@
+#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 found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ */
+
+#include <rtems/irq.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);
+extern void BSP_disable_irq_at_pic		(const rtems_irq_number irqLine);
+
+/*
+ * Initialize the PIC.
+ * Return nonzero on success, zero on failure (which will be treated
+ * as fatal by the manager).
+ */
+extern int  BSP_setup_the_pic			(rtems_irq_global_settings* config);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif