SPARC BSPs: implemented shared-irq using libbsp/shared layer

The implementation use IRQ number instead of vector number since
some IRQs does not have a unique vector, for example the extended
interrupts all enter the same trap vector entry.

Added support for the LEON3 extended interrupt controller when using
the shared IRQ layer.

ERC32 patches untested.

Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>

Regenerate

1 files changed, 74 insertions, 0 deletions

diff --git a/c/src/lib/libbsp/sparc/leon2/include/bsp.h b/c/src/lib/libbsp/sparc/leon2/include/bsp.h
index 796290e915..e96a63ee90 100644
--- a/c/src/lib/libbsp/sparc/leon2/include/bsp.h
+++ b/c/src/lib/libbsp/sparc/leon2/include/bsp.h
@@ -30,6 +30,7 @@ extern "C" {
 #include <leon.h>
 #include <rtems/clockdrv.h>
 #include <rtems/console.h>
+#include <rtems/irq-extension.h>
 
 /* SPARC CPU variant: LEON2 */
 #define LEON2 1
@@ -105,6 +106,79 @@ void bsp_spurious_initialize( void );
  */
 void *bsp_early_malloc(int size);
 
+/* Interrupt Service Routine (ISR) pointer */
+typedef void (*bsp_shared_isr)(void *arg);
+
+/* Initializes the Shared System Interrupt service */
+extern int BSP_shared_interrupt_init(void);
+
+/* Registers a shared IRQ handler, and enable it at IRQ controller. Multiple
+ * interrupt handlers may use the same IRQ number, all ISRs will be called
+ * when an interrupt on that line is fired.
+ *
+ * Arguments
+ *  irq       System IRQ number
+ *  info      Optional Name of IRQ source
+ *  isr       Function pointer to the ISR
+ *  arg       Second argument to function isr
+ */
+static __inline__ int BSP_shared_interrupt_register
+       (
+       int irq,
+       const char *info,
+       bsp_shared_isr isr,
+       void *arg
+       )
+{
+       return rtems_interrupt_handler_install(irq, info,
+                                       RTEMS_INTERRUPT_SHARED, isr, arg);
+}
+
+/* Unregister previously registered shared IRQ handler.
+ *
+ * Arguments
+ *  irq       System IRQ number
+ *  isr       Function pointer to the ISR
+ *  arg       Second argument to function isr
+ */
+static __inline__ int BSP_shared_interrupt_unregister
+       (
+       int irq,
+       bsp_shared_isr isr,
+       void *arg
+       )
+{
+       return rtems_interrupt_handler_remove(irq, isr, arg);
+}
+
+/* Clear interrupt pending on IRQ controller, this is typically done on a
+ * level triggered interrupt source such as PCI to avoid taking double IRQs.
+ * In such a case the interrupt source must be cleared first on LEON, before
+ * acknowledging the IRQ with this function.
+ *
+ * Arguments
+ *  irq       System IRQ number
+ */
+extern void BSP_shared_interrupt_clear(int irq);
+
+/* Enable Interrupt. This function will unmask the IRQ at the interrupt
+ * controller. This is normally done by _register(). Note that this will
+ * affect all ISRs on this IRQ.
+ *
+ * Arguments
+ *  irq       System IRQ number
+ */
+extern void BSP_shared_interrupt_unmask(int irq);
+
+/* Disable Interrupt. This function will mask one IRQ at the interrupt
+ * controller. This is normally done by _unregister().  Note that this will
+ * affect all ISRs on this IRQ.
+ *
+ * Arguments
+ *  irq         System IRQ number
+ */
+extern void BSP_shared_interrupt_mask(int irq);
+
 #ifdef __cplusplus
 }
 #endif