bsps: Move interrupt controller support to bsps

This patch is a part of the BSP source reorganization.

Update #3285.

1 files changed, 125 insertions, 0 deletions

diff --git a/bsps/powerpc/psim/irq/irq_init.c b/bsps/powerpc/psim/irq/irq_init.c
new file mode 100644
index 0000000000..3d2a82f2c0
--- /dev/null
+++ b/bsps/powerpc/psim/irq/irq_init.c
@@ -0,0 +1,125 @@
+/*
+ *  This file contains the implementation of rtems initialization
+ *  related to interrupt handling
+ */
+
+/*
+ *  Copyright (C) 1999 valette@crf.canon.fr
+ *
+ *  Enhanced by Jay Kulpinski <jskulpin@eng01.gdds.com>
+ *  to make it valid for MVME2300 Motorola boards.
+ *
+ *  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.
+ */
+
+#include <libcpu/io.h>
+#include <libcpu/spr.h>
+#include <bsp/irq.h>
+#include <bsp.h>
+#include <psim.h>
+#include <bsp/vectors.h>
+#include <rtems/bspIo.h>
+#include <bsp/openpic.h>
+#include <bsp/irq-generic.h>
+
+static rtems_irq_connect_data      rtemsIrq[BSP_IRQ_NUMBER];
+static rtems_irq_global_settings   initial_config;
+static rtems_irq_connect_data      defaultIrq = {
+  /* vectorIdex, hdl  , handle  , on  , off , isOn */
+      0,          NULL, NULL    , NULL, NULL, NULL
+};
+static rtems_irq_prio irqPrioTable[BSP_IRQ_NUMBER]={
+  /*
+   * Processor exceptions handled as interrupts
+   */
+  0
+};
+
+  /*
+   * This code assumes the exceptions management setup has already
+   * been done. We just need to replace the exceptions that will
+   * be handled like interrupt. On mcp750/mpc750 and many PPC processors
+   * this means the decrementer exception and the external exception.
+   */
+void BSP_rtems_irq_mng_init(unsigned cpuId)
+{
+  int i;
+
+  /*
+   * First initialize the Interrupt management hardware
+   */
+  OpenPIC = (void*)PSIM.OpenPIC;
+  openpic_init(1,0,0,16,0,0);
+
+  /*
+   * Initialize Rtems management interrupt table
+   */
+  /*
+   * re-init the rtemsIrq table
+   */
+  for (i = 0; i < BSP_IRQ_NUMBER; i++) {
+    rtemsIrq[i]      = defaultIrq;
+    rtemsIrq[i].name = i;
+  }
+  /*
+   * Init initial Interrupt management config
+   */
+  initial_config.irqNb        = BSP_IRQ_NUMBER;
+  initial_config.defaultEntry = defaultIrq;
+  initial_config.irqHdlTbl    = rtemsIrq;
+  initial_config.irqBase      = BSP_LOWEST_OFFSET;
+  initial_config.irqPrioTbl   = irqPrioTable;
+
+  for (i = BSP_PCI_IRQ_LOWEST_OFFSET; i< BSP_PCI_IRQ_NUMBER; i++ ) {
+  	irqPrioTable[i] = 8;
+  }
+
+  if (!BSP_rtems_irq_mngt_set(&initial_config)) {
+    /*
+     * put something here that will show the failure...
+     */
+    rtems_panic(
+      "Unable to initialize RTEMS interrupt Management!!! System locked\n"
+    );
+  }
+
+  #ifdef TRACE_IRQ_INIT
+    printk("RTEMS IRQ management is now operationnal\n");
+  #endif
+}
+
+static int psim_exception_handler(
+  BSP_Exception_frame *frame,
+  unsigned exception_number
+)
+{
+  rtems_panic("Unexpected interrupt occured");
+  return 0;
+}
+
+/*
+ * functions to enable/disable a source at the ipic
+ */
+void bsp_interrupt_vector_enable( rtems_vector_number irqnum)
+{
+  /* FIXME: do something */
+  bsp_interrupt_assert(bsp_interrupt_is_valid_vector(irqnum));
+}
+
+void bsp_interrupt_vector_disable( rtems_vector_number irqnum)
+{
+  /* FIXME: do something */
+  bsp_interrupt_assert(bsp_interrupt_is_valid_vector(irqnum));
+}
+
+rtems_status_code bsp_interrupt_facility_initialize(void)
+{
+  /* Install exception handler */
+  if (ppc_exc_set_handler( ASM_EXT_VECTOR, psim_exception_handler)) {
+    return RTEMS_IO_ERROR;
+  }
+  
+  return RTEMS_SUCCESSFUL;
+}