2005-04-28 Jennifer Averett <jennifer.averett@oarcorp.com>

	* Add/move files for the Update to new exception model.
	  NOTE: These modifications have not been tested on hardware.
	* irq/FPGA.c, irq/irq.c, irq/irq.h, irq/irq_init.c: New files.
	* startup/FPGA.c: Removed.

5 files changed, 1172 insertions, 0 deletions

diff --git a/c/src/lib/libbsp/powerpc/score603e/ChangeLog b/c/src/lib/libbsp/powerpc/score603e/ChangeLog
index 34a4c70d0e..23ffc116e8 100644
--- a/c/src/lib/libbsp/powerpc/score603e/ChangeLog
+++ b/c/src/lib/libbsp/powerpc/score603e/ChangeLog
@@ -1,3 +1,10 @@
+2005-04-28      Jennifer Averett <jennifer.averett@oarcorp.com>
+        
+        * Add/move files for the Update to new exception model.
+          NOTE: These modifications have not been tested on hardware.
+        * irq/FPGA.c, irq/irq.c, irq/irq.h, irq/irq_init.c: New files.
+        * startup/FPGA.c: Removed.
+
 2005-04-15      Jennifer Averett <jennifer.averett@oarcorp.com>
 
         * clock/clock.c: Fix multiple defined warning
diff --git a/c/src/lib/libbsp/powerpc/score603e/startup/FPGA.c b/c/src/lib/libbsp/powerpc/score603e/irq/FPGA.c
index 46c012f2ae..46c012f2ae 100644
--- a/c/src/lib/libbsp/powerpc/score603e/startup/FPGA.c
+++ b/c/src/lib/libbsp/powerpc/score603e/irq/FPGA.c
diff --git a/c/src/lib/libbsp/powerpc/score603e/irq/irq.c b/c/src/lib/libbsp/powerpc/score603e/irq/irq.c
new file mode 100644
index 0000000000..d743bcc962
--- /dev/null
+++ b/c/src/lib/libbsp/powerpc/score603e/irq/irq.c
@@ -0,0 +1,451 @@
+/*
+ *
+ *  This file contains the implementation of the function described in irq.h
+ *
+ *  Copyright (C) 1998, 1999 valette@crf.canon.fr
+ *
+ *  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.
+ *
+ *  $Id$
+ */
+
+#include <stdlib.h>
+
+#include <bsp.h>
+#include <bsp/irq.h>
+#include <bsp/VME.h>
+#include <rtems/score/apiext.h>  /* for post ISR signal processing */
+#include <libcpu/raw_exception.h>
+#include <libcpu/io.h>
+#include <bsp/vectors.h>
+#include <stdlib.h>
+#include <rtems/bspIo.h> /* for printk */
+
+/*
+ * default handler connected on each irq after bsp initialization
+ */
+static rtems_irq_connect_data	default_rtems_entry;
+
+/*
+ * location used to store initial tables used for interrupt
+ * management.
+ */
+static rtems_irq_global_settings* 	internal_config;
+static rtems_irq_connect_data*		rtems_hdl_tbl;
+
+/*
+ * Check if IRQ is an ISA IRQ
+ */
+static inline int is_isa_irq(const rtems_irq_symbolic_name irqLine)
+{
+  return (((int) irqLine <= BSP_ISA_IRQ_MAX_OFFSET) &
+	  ((int) irqLine >= BSP_ISA_IRQ_LOWEST_OFFSET)
+	 );
+}
+
+/*
+ * Check if IRQ is an pci IRQ
+ */
+static inline int is_pci_irq(const rtems_irq_symbolic_name irqLine)
+{
+  return (((int) irqLine <= BSP_PCI_IRQ_MAX_OFFSET) &
+	  ((int) irqLine >= BSP_PCI_IRQ_LOWEST_OFFSET)
+	 );
+}
+
+/*
+ * Check if IRQ is a Processor IRQ
+ */
+static inline int is_processor_irq(const rtems_irq_symbolic_name irqLine)
+{
+  return (((int) irqLine <= BSP_PROCESSOR_IRQ_MAX_OFFSET) &
+	  ((int) irqLine >= BSP_PROCESSOR_IRQ_LOWEST_OFFSET)
+	 );
+}
+
+/*
+ * ------------------------ RTEMS Irq helper functions ----------------
+ */
+
+/*
+ * This function check that the value given for the irq line
+ * is valid.
+ */
+
+static int isValidInterrupt(int irq)
+{
+  if ( (irq < BSP_LOWEST_OFFSET) || (irq > BSP_MAX_OFFSET))
+    return 0;
+  return 1;
+}
+
+/*
+ * ------------------------ RTEMS Shared Irq Handler Mngt Routines ----------------
+ */
+int BSP_install_rtems_shared_irq_handler  (const rtems_irq_connect_data* irq)
+{
+    unsigned int level;
+    rtems_irq_connect_data* vchain;
+
+    if (!isValidInterrupt(irq->name)) {
+      printk("Invalid interrupt vector %d\n",irq->name);
+      return 0;
+    }
+
+    _CPU_ISR_Disable(level);
+
+    if ( (int)rtems_hdl_tbl[irq->name].next_handler  == -1 ) {
+      _CPU_ISR_Enable(level);
+      printk("IRQ vector %d already connected to an unshared handler\n",irq->name);
+      return 0;
+    }
+
+     vchain = (rtems_irq_connect_data*)malloc(sizeof(rtems_irq_connect_data));
+
+    /* save off topmost handler */
+    vchain[0]= rtems_hdl_tbl[irq->name];
+
+    /*
+     * store the data provided by user
+     */
+    rtems_hdl_tbl[irq->name] = *irq;
+
+    /* link chain to new topmost handler */
+    rtems_hdl_tbl[irq->name].next_handler = (void *)vchain;
+
+    /*
+     * XXX FIX ME
+     */
+    if (is_pci_irq(irq->name)) {
+    }
+
+    if (is_processor_irq(irq->name)) {
+      /*
+       * Enable exception at processor level
+       */
+    }
+    /*
+     * Enable interrupt on device
+     */
+    irq->on(irq);
+
+    _CPU_ISR_Enable(level);
+
+    return 1;
+}
+
+/*
+ * ------------------------ RTEMS Single Irq Handler Mngt Routines ----------------
+ */
+
+int BSP_install_rtems_irq_handler  (const rtems_irq_connect_data* irq)
+{
+    unsigned int level;
+
+    if (!isValidInterrupt(irq->name)) {
+      printk("Invalid interrupt vector %d\n",irq->name);
+      return 0;
+    }
+    /*
+     * Check if default handler is actually connected. If not issue an error.
+     * You must first get the current handler via i386_get_current_idt_entry
+     * and then disconnect it using i386_delete_idt_entry.
+     * RATIONALE : to always have the same transition by forcing the user
+     * to get the previous handler before accepting to disconnect.
+     */
+    _CPU_ISR_Disable(level);
+    if (rtems_hdl_tbl[irq->name].hdl != default_rtems_entry.hdl) {
+      _CPU_ISR_Enable(level);
+      printk("IRQ vector %d already connected\n",irq->name);
+      return 0;
+    }
+
+    /*
+     * store the data provided by user
+     */
+    rtems_hdl_tbl[irq->name] = *irq;
+    rtems_hdl_tbl[irq->name].next_handler = (void *)-1;
+
+    /* XXX -FIX ME !! */
+    if (is_pci_irq(irq->name)) {
+      /*
+       * Enable interrupt 
+       */
+    }
+
+    if (is_processor_irq(irq->name)) {
+      /*
+       * Enable exception at processor level
+       */
+    }
+    /*
+     * Enable interrupt on device
+     */
+    irq->on(irq);
+
+    _CPU_ISR_Enable(level);
+
+    return 1;
+}
+
+int BSP_get_current_rtems_irq_handler	(rtems_irq_connect_data* irq)
+{
+     unsigned int level;
+
+     if (!isValidInterrupt(irq->name)) {
+      return 0;
+     }
+     _CPU_ISR_Disable(level);
+     *irq = rtems_hdl_tbl[irq->name];
+     _CPU_ISR_Enable(level);
+     return 1;
+}
+
+int BSP_remove_rtems_irq_handler  (const rtems_irq_connect_data* irq)
+{
+   rtems_irq_connect_data *pchain= NULL, *vchain = NULL;
+    unsigned int level;
+
+    if (!isValidInterrupt(irq->name)) {
+      return 0;
+    }
+    /*
+     * Check if default handler is actually connected. If not issue an error.
+     * You must first get the current handler via i386_get_current_idt_entry
+     * and then disconnect it using i386_delete_idt_entry.
+     * RATIONALE : to always have the same transition by forcing the user
+     * to get the previous handler before accepting to disconnect.
+     */
+    _CPU_ISR_Disable(level);
+    if (rtems_hdl_tbl[irq->name].hdl != irq->hdl) {
+      _CPU_ISR_Enable(level);
+      return 0;
+    }
+
+    if( (int)rtems_hdl_tbl[irq->name].next_handler != -1 )
+    {
+       int found = 0;
+
+       for( (pchain= NULL, vchain = &rtems_hdl_tbl[irq->name]);
+            (vchain->hdl != default_rtems_entry.hdl);
+            (pchain= vchain, vchain = (rtems_irq_connect_data*)vchain->next_handler) )
+       {
+          if( vchain->hdl == irq->hdl )
+          {
+             found= -1; break;
+          }
+       }
+
+       if( !found )
+       {
+          _CPU_ISR_Enable(level);
+          return 0;
+       }
+    }
+    else
+    {
+       if (rtems_hdl_tbl[irq->name].hdl != irq->hdl)
+       {
+          _CPU_ISR_Enable(level);
+         return 0;
+       }
+    }
+
+    /* XXX - FIX ME !! */
+    if (is_pci_irq(irq->name)) {
+      /*
+       * disable interrupt 
+       */
+    }
+    if (is_processor_irq(irq->name)) {
+      /*
+       * disable exception at processor level
+       */
+    }
+
+    /*
+     * Disable interrupt on device
+     */
+    irq->off(irq);
+
+    /*
+     * restore the default irq value
+     */
+    if( !vchain )
+    {
+       /* single handler vector... */
+       rtems_hdl_tbl[irq->name] = default_rtems_entry;
+    }
+    else
+    {
+       if( pchain )
+       {
+          /* non-first handler being removed */
+          pchain->next_handler = vchain->next_handler;
+       }
+       else
+       {
+          /* first handler isn't malloc'ed, so just overwrite it.  Since
+          the contents of vchain are being struct copied, vchain itself
+          goes away */
+          rtems_hdl_tbl[irq->name]= *vchain;
+       }
+       free(vchain);
+    }
+
+    _CPU_ISR_Enable(level);
+
+    return 1;
+}
+
+/*
+ * RTEMS Global Interrupt Handler Management Routines
+ */
+
+int BSP_rtems_irq_mngt_set(rtems_irq_global_settings* config)
+{
+    int i;
+    unsigned int level;
+   /*
+    * Store various code accelerators
+    */
+    internal_config 		= config;
+    default_rtems_entry 	= config->defaultEntry;
+    rtems_hdl_tbl 		= config->irqHdlTbl;
+
+    _CPU_ISR_Disable(level);
+    /*
+     * set up internal tables used by rtems interrupt prologue
+     */
+
+    /*
+     *  XXX - FIX ME !!!  
+     */
+    for (i=BSP_PCI_IRQ_LOWEST_OFFSET; i < BSP_PCI_IRQ_LOWEST_OFFSET + BSP_PCI_IRQ_NUMBER ; i++) {
+      if (rtems_hdl_tbl[i].hdl != default_rtems_entry.hdl) {
+         {
+            rtems_irq_connect_data* vchain;
+            for( vchain = &rtems_hdl_tbl[i];
+                 ((int)vchain != -1 && vchain->hdl != default_rtems_entry.hdl);
+                 vchain = (rtems_irq_connect_data*)vchain->next_handler )
+            {
+               vchain->on(vchain);
+            }
+         }
+
+      }
+      else {
+         /* rtems_hdl_tbl[i].off(&rtems_hdl_tbl[i]); */
+         {
+            rtems_irq_connect_data* vchain;
+            for( vchain = &rtems_hdl_tbl[i];
+                 ((int)vchain != -1 && vchain->hdl != default_rtems_entry.hdl);
+                 vchain = (rtems_irq_connect_data*)vchain->next_handler )
+            {
+               vchain->off(vchain);
+            }
+         }
+      }
+    }
+    /*
+     * finish with Processor exceptions handled like IRQ
+     */
+    for (i=BSP_PROCESSOR_IRQ_LOWEST_OFFSET; i < BSP_PROCESSOR_IRQ_LOWEST_OFFSET+BSP_PROCESSOR_IRQ_NUMBER; i++){
+      if (rtems_hdl_tbl[i].hdl != default_rtems_entry.hdl) {
+         {
+            rtems_irq_connect_data* vchain;
+            for( vchain = &rtems_hdl_tbl[i];
+                 ((int)vchain != -1 && vchain->hdl != default_rtems_entry.hdl);
+                 vchain = (rtems_irq_connect_data*)vchain->next_handler )
+            {
+               vchain->on(vchain);
+            }
+         }
+
+      }
+      else {
+         {
+            rtems_irq_connect_data* vchain;
+            for( vchain = &rtems_hdl_tbl[i];
+                 ((int)vchain != -1 && vchain->hdl != default_rtems_entry.hdl);
+                 vchain = (rtems_irq_connect_data*)vchain->next_handler )
+            {
+               vchain->off(vchain);
+            }
+         }
+
+      }
+    }
+    _CPU_ISR_Enable(level);
+    return 1;
+}
+
+int BSP_rtems_irq_mngt_get(rtems_irq_global_settings** config)
+{
+    *config = internal_config;
+    return 0;
+}
+
+int _BSP_vme_bridge_irq = -1;
+
+unsigned BSP_spuriousIntr = 0;
+/*
+ * High level IRQ handler called from shared_raw_irq_code_entry
+ */
+void C_dispatch_irq_handler (CPU_Interrupt_frame *frame, unsigned int excNum)
+{
+  register unsigned int irq;
+  register unsigned msr;
+  register unsigned new_msr;
+
+  if (excNum == ASM_DEC_VECTOR) {
+    _CPU_MSR_GET(msr);
+    new_msr = msr | MSR_EE;
+    _CPU_MSR_SET(new_msr);
+
+    rtems_hdl_tbl[BSP_DECREMENTER].hdl(rtems_hdl_tbl[BSP_DECREMENTER].handle);
+
+    _CPU_MSR_SET(msr);
+    return;
+
+  }
+  irq = read_and_clear_irq();
+  _CPU_MSR_GET(msr);
+  new_msr = msr | MSR_EE;
+  _CPU_MSR_SET(new_msr);
+
+  /* rtems_hdl_tbl[irq].hdl(rtems_hdl_tbl[irq].handle); */
+  {
+     rtems_irq_connect_data* vchain;
+     for( vchain = &rtems_hdl_tbl[irq];
+          ((int)vchain != -1 && vchain->hdl != default_rtems_entry.hdl);
+          vchain = (rtems_irq_connect_data*)vchain->next_handler )
+     {
+        vchain->hdl(vchain->handle);
+     }
+  }
+
+  _CPU_MSR_SET(msr);
+
+}
+
+void _ThreadProcessSignalsFromIrq (BSP_Exception_frame* ctx)
+{
+  /*
+   * Process pending signals that have not already been
+   * processed by _Thread_Displatch. This happens quite
+   * unfrequently : the ISR must have posted an action
+   * to the current running thread.
+   */
+  if ( _Thread_Do_post_task_switch_extension ||
+       _Thread_Executing->do_post_task_switch_extension ) {
+    _Thread_Executing->do_post_task_switch_extension = FALSE;
+    _API_extensions_Run_postswitch();
+  }
+  /*
+   * I plan to process other thread related events here.
+   * This will include DEBUG session requested from keyboard...
+   */
+}
diff --git a/c/src/lib/libbsp/powerpc/score603e/irq/irq.h b/c/src/lib/libbsp/powerpc/score603e/irq/irq.h
new file mode 100644
index 0000000000..93dcf9d3c4
--- /dev/null
+++ b/c/src/lib/libbsp/powerpc/score603e/irq/irq.h
@@ -0,0 +1,350 @@
+/* irq.h
+ *
+ *  This include file describe the data structure and the functions implemented
+ *  by RTEMS to write interrupt handlers.
+ *
+ *  Copyright (C) 1999 valette@crf.canon.fr
+ *
+ *  This code is heavilly inspired by the public specification of STREAM V2
+ *  that can be found at :
+ *
+ *      <http://www.chorus.com/Documentation/index.html> by following
+ *  the STREAM API Specification Document link.
+ *
+ *  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.
+ *
+ *  $Id$
+ */
+
+#ifndef LIBBSP_POWERPC_MCP750_IRQ_IRQ_H
+#define LIBBSP_POWERPC_MCP750_IRQ_IRQ_H
+
+/*
+ * 8259 edge/level control definitions at VIA
+ */
+#define ISA8259_M_ELCR 		0x4d0
+#define ISA8259_S_ELCR 		0x4d1
+
+#define ELCRS_INT15_LVL         0x80
+#define ELCRS_INT14_LVL         0x40
+#define ELCRS_INT13_LVL         0x20
+#define ELCRS_INT12_LVL         0x10
+#define ELCRS_INT11_LVL         0x08
+#define ELCRS_INT10_LVL         0x04
+#define ELCRS_INT9_LVL          0x02
+#define ELCRS_INT8_LVL          0x01
+#define ELCRM_INT7_LVL          0x80
+#define ELCRM_INT6_LVL          0x40
+#define ELCRM_INT5_LVL          0x20
+#define ELCRM_INT4_LVL          0x10
+#define ELCRM_INT3_LVL          0x8
+#define ELCRM_INT2_LVL          0x4
+#define ELCRM_INT1_LVL          0x2
+#define ELCRM_INT0_LVL          0x1
+
+#define BSP_ASM_IRQ_VECTOR_BASE 0x0
+    /* PIC's command and mask registers */
+#define PIC_MASTER_COMMAND_IO_PORT		0x20	/* Master PIC command register */
+#define PIC_SLAVE_COMMAND_IO_PORT		0xa0	/* Slave PIC command register */
+#define PIC_MASTER_IMR_IO_PORT			0x21	/* Master PIC Interrupt Mask Register */
+#define PIC_SLAVE_IMR_IO_PORT		 	0xa1	/* Slave PIC Interrupt Mask Register */
+
+    /* Command for specific EOI (End Of Interrupt): Interrupt acknowledge */
+#define PIC_EOSI	0x60	/* End of Specific Interrupt (EOSI) */
+#define	SLAVE_PIC_EOSI  0x62	/* End of Specific Interrupt (EOSI) for cascade */
+#define PIC_EOI		0x20	/* Generic End of Interrupt (EOI) */
+
+#ifndef ASM
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Symbolic IRQ names and related definitions
+ */
+
+typedef enum {
+  /* Base vector for our ISA IRQ handlers. */
+  BSP_ISA_IRQ_VECTOR_BASE	= BSP_ASM_IRQ_VECTOR_BASE,
+  /*
+   * ISA IRQ handler related definitions
+   */
+  BSP_ISA_IRQ_NUMBER    	= 16,
+  BSP_ISA_IRQ_LOWEST_OFFSET	= 0,
+  BSP_ISA_IRQ_MAX_OFFSET	= BSP_ISA_IRQ_LOWEST_OFFSET + BSP_ISA_IRQ_NUMBER - 1,
+  /*
+   * PCI IRQ handlers related definitions
+   * CAUTION : BSP_PCI_IRQ_LOWEST_OFFSET should be equal to OPENPIC_VEC_SOURCE
+   */
+  BSP_PCI_IRQ_NUMBER		= 16,
+  BSP_PCI_IRQ_LOWEST_OFFSET	= BSP_ISA_IRQ_NUMBER,
+  BSP_PCI_IRQ_MAX_OFFSET	= BSP_PCI_IRQ_LOWEST_OFFSET + BSP_PCI_IRQ_NUMBER - 1,
+  /*
+   * PowerPC exceptions handled as interrupt where an RTEMS managed interrupt
+   * handler might be connected
+   */
+  BSP_PROCESSOR_IRQ_NUMBER	= 1,
+  BSP_PROCESSOR_IRQ_LOWEST_OFFSET = BSP_PCI_IRQ_MAX_OFFSET + 1,
+  BSP_PROCESSOR_IRQ_MAX_OFFSET	= BSP_PROCESSOR_IRQ_LOWEST_OFFSET + BSP_PROCESSOR_IRQ_NUMBER - 1,
+  /* Misc vectors for OPENPIC irqs (IPI, timers)
+   */
+  BSP_MISC_IRQ_NUMBER		= 8,
+  BSP_MISC_IRQ_LOWEST_OFFSET	= BSP_PROCESSOR_IRQ_MAX_OFFSET + 1,
+  BSP_MISC_IRQ_MAX_OFFSET	= BSP_MISC_IRQ_LOWEST_OFFSET + BSP_MISC_IRQ_NUMBER - 1,
+  /*
+   * Summary
+   */
+  BSP_IRQ_NUMBER		= BSP_MISC_IRQ_MAX_OFFSET + 1,
+  BSP_LOWEST_OFFSET		= BSP_ISA_IRQ_LOWEST_OFFSET,
+  BSP_MAX_OFFSET		= BSP_MISC_IRQ_MAX_OFFSET,
+    /*
+     * Some ISA IRQ symbolic name definition
+     */
+  BSP_ISA_PERIODIC_TIMER      	= 0,
+  BSP_ISA_KEYBOARD          	= 1,
+  BSP_ISA_UART_COM2_IRQ		= 3,
+  BSP_ISA_UART_COM1_IRQ		= 4,
+  BSP_ISA_RT_TIMER1	      	= 8,
+  BSP_ISA_RT_TIMER3		= 10,
+    /*
+     * Some PCI IRQ symbolic name definition
+     */
+  BSP_PCI_IRQ0			= BSP_PCI_IRQ_LOWEST_OFFSET,
+  BSP_PCI_ISA_BRIDGE_IRQ	= BSP_PCI_IRQ0,
+
+#if defined(mvme2100)
+  BSP_DEC21143_IRQ                = BSP_PCI_IRQ_LOWEST_OFFSET + 1,
+  BSP_PMC_PCMIP_TYPE1_SLOT0_IRQ   = BSP_PCI_IRQ_LOWEST_OFFSET + 2,
+  BSP_PCMIP_TYPE1_SLOT1_IRQ       = BSP_PCI_IRQ_LOWEST_OFFSET + 3,
+  BSP_PCMIP_TYPE2_SLOT0_IRQ       = BSP_PCI_IRQ_LOWEST_OFFSET + 4,
+  BSP_PCMIP_TYPE2_SLOT1_IRQ       = BSP_PCI_IRQ_LOWEST_OFFSET + 5,
+  BSP_PCI_INTA_UNIVERSE_LINT0_IRQ = BSP_PCI_IRQ_LOWEST_OFFSET + 7,
+  BSP_PCI_INTB_UNIVERSE_LINT1_IRQ = BSP_PCI_IRQ_LOWEST_OFFSET + 8,
+  BSP_PCI_INTC_UNIVERSE_LINT2_IRQ = BSP_PCI_IRQ_LOWEST_OFFSET + 9,
+  BSP_PCI_INTD_UNIVERSE_LINT3_IRQ = BSP_PCI_IRQ_LOWEST_OFFSET + 10,
+  BSP_UART_COM1_IRQ               = BSP_PCI_IRQ_LOWEST_OFFSET + 13,
+  BSP_FRONT_PANEL_ABORT_IRQ       = BSP_PCI_IRQ_LOWEST_OFFSET + 14,
+  BSP_RTC_IRQ                     = BSP_PCI_IRQ_LOWEST_OFFSET + 15,
+#endif
+
+    /*
+     * Some Processor execption handled as RTEMS IRQ symbolic name definition
+     */
+  BSP_DECREMENTER		= BSP_PROCESSOR_IRQ_LOWEST_OFFSET
+
+} rtems_irq_symbolic_name;
+
+/*
+ * Type definition for RTEMS managed interrupts
+ */
+typedef unsigned char  rtems_irq_prio;
+typedef unsigned short rtems_i8259_masks;
+
+extern  volatile rtems_i8259_masks i8259s_cache;
+
+struct 	__rtems_irq_connect_data__;	/* forward declaratiuon */
+
+typedef void *rtems_irq_hdl_param;
+typedef void (*rtems_irq_hdl)		(rtems_irq_hdl_param);
+typedef void (*rtems_irq_enable)	(const struct __rtems_irq_connect_data__*);
+typedef void (*rtems_irq_disable)	(const struct __rtems_irq_connect_data__*);
+typedef int  (*rtems_irq_is_enabled)	(const struct __rtems_irq_connect_data__*);
+
+typedef struct __rtems_irq_connect_data__ {
+      /*
+       * IRQ line
+       */
+      rtems_irq_symbolic_name 	name;
+      /*
+       * handler. See comment on handler properties below in function prototype.
+       */
+      rtems_irq_hdl	   		hdl;
+     /*
+      * Handler handle to store private data
+      */
+      rtems_irq_hdl_param		handle;
+      /*
+       * function for enabling interrupts at device level (ONLY!).
+       * The BSP code will automatically enable it at i8259s level and openpic level.
+       * RATIONALE : anyway such code has to exist in current driver code.
+       * It is usually called immediately AFTER connecting the interrupt handler.
+       * RTEMS may well need such a function when restoring normal interrupt
+       * processing after a debug session.
+       *
+       */
+      rtems_irq_enable		on;
+      /*
+       * function for disabling interrupts at device level (ONLY!).
+       * The code will disable it at i8259s level. RATIONALE : anyway
+       * such code has to exist for clean shutdown. It is usually called
+       * BEFORE disconnecting the interrupt. RTEMS may well need such
+       * a function when disabling normal interrupt processing for
+       * a debug session. May well be a NOP function.
+       */
+      rtems_irq_disable		off;
+      /*
+       * function enabling to know what interrupt may currently occur
+       * if someone manipulates the i8259s interrupt mask without care...
+       */
+      rtems_irq_is_enabled	isOn;
+      /*
+       *  Set to -1 for vectors forced to have only 1 handler
+       */
+      void *next_handler;
+
+}rtems_irq_connect_data;
+
+typedef struct {
+  /*
+   * size of all the table fields (*Tbl) described below.
+   */
+  unsigned int	 		irqNb;
+  /*
+   * Default handler used when disconnecting interrupts.
+   */
+  rtems_irq_connect_data	defaultEntry;
+  /*
+   * Table containing initials/current value.
+   */
+  rtems_irq_connect_data*	irqHdlTbl;
+  /*
+   * actual value of BSP_ISA_IRQ_VECTOR_BASE...
+   */
+  rtems_irq_symbolic_name	irqBase;
+  /*
+   * software priorities associated with interrupts.
+   * if (*irqPrio  [i]  >  intrPrio  [j]  it  means  that
+   * interrupt handler hdl connected for interrupt name i
+   * will  not be interrupted by the handler connected for interrupt j
+   * The interrupt source  will be physically masked at i8259 level.
+   */
+    rtems_irq_prio*		irqPrioTbl;
+}rtems_irq_global_settings;
+
+/*-------------------------------------------------------------------------+
+| Function Prototypes.
++--------------------------------------------------------------------------*/
+/*
+ * ------------------------ Intel 8259 (or emulation) Mngt Routines -------
+ */
+
+/*
+ * function to disable a particular irq at 8259 level. After calling
+ * this function, even if the device asserts the interrupt line it will
+ * not be propagated further to the processor
+ */
+int BSP_irq_disable_at_i8259s        (const rtems_irq_symbolic_name irqLine);
+/*
+ * function to enable a particular irq at 8259 level. After calling
+ * this function, if the device asserts the interrupt line it will
+ * be propagated further to the processor
+ */
+int BSP_irq_enable_at_i8259s		(const rtems_irq_symbolic_name irqLine);
+/*
+ * function to acknowledge a particular irq at 8259 level. After calling
+ * this function, if a device asserts an enabled interrupt line it will
+ * be propagated further to the processor. Mainly usefull for people
+ * writing raw handlers as this is automagically done for RTEMS managed
+ * handlers.
+ */
+int BSP_irq_ack_at_i8259s           	(const rtems_irq_symbolic_name irqLine);
+/*
+ * function to check if a particular irq is enabled at 8259 level. After calling
+ */
+int BSP_irq_enabled_at_i8259s        	(const rtems_irq_symbolic_name irqLine);
+/*
+ * ------------------------ RTEMS Single Irq Handler Mngt Routines ----------------
+ */
+/*
+ * function to connect a particular irq handler. This hanlder will NOT be called
+ * directly as the result of the corresponding interrupt. Instead, a RTEMS
+ * irq prologue will be called that will :
+ *
+ *	1) save the C scratch registers,
+ *	2) switch to a interrupt stack if the interrupt is not nested,
+ *	3) store the current i8259s' interrupt masks
+ *	4) modify them to disable the current interrupt at 8259 level (and may
+ *	be others depending on software priorities)
+ *	5) acknowledge the i8259s',
+ *	6) demask the processor,
+ *	7) call the application handler
+ *
+ * As a result the hdl function provided
+ *
+ *	a) can perfectly be written is C,
+ * 	b) may also well directly call the part of the RTEMS API that can be
+ *      used from interrupt level,
+ *	c) It only responsible for handling the jobs that need to be done at
+ *	the device level including (aknowledging/re-enabling the interrupt
+ *      at device, level, getting the data,...)
+ *
+ *	When returning from the function, the following will be performed by
+ *	the RTEMS irq epilogue:
+ *
+ *	1) masks the interrupts again,
+ *	2) restore the original i8259s' interrupt masks
+ *	3) switch back on the orinal stack if needed,
+ *	4) perform rescheduling when necessary,
+ *	5) restore the C scratch registers...
+ *	6) restore initial execution flow
+ */
+int BSP_install_rtems_irq_handler   	(const rtems_irq_connect_data*);
+int BSP_install_rtems_shared_irq_handler  (const rtems_irq_connect_data*);
+
+#define BSP_SHARED_HANDLER_SUPPORT      1
+
+/*
+ * function to get the current RTEMS irq handler for ptr->name. It enables to
+ * define hanlder chain...
+ */
+int BSP_get_current_rtems_irq_handler	(rtems_irq_connect_data* ptr);
+/*
+ * function to get disconnect the RTEMS irq handler for ptr->name.
+ * This function checks that the value given is the current one for safety
+ * reasons.
+ * The user can use the previous function to get it.
+ */
+int BSP_remove_rtems_irq_handler    	(const rtems_irq_connect_data*);
+
+/*
+ * ------------------------ RTEMS Global Irq Handler Mngt Routines ----------------
+ */
+/*
+ * (Re) Initialize the RTEMS interrupt management.
+ *
+ * The result of calling this function will be the same as if each individual
+ * handler (config->irqHdlTbl[i].hdl)  different from "config->defaultEntry.hdl"
+ * has been individualy connected via
+ *	BSP_install_rtems_irq_handler(&config->irqHdlTbl[i])
+ * And each handler currently equal to config->defaultEntry.hdl
+ * has been previously disconnected via
+ * 	 BSP_remove_rtems_irq_handler (&config->irqHdlTbl[i])
+ *
+ * This is to say that all information given will be used and not just
+ * only the space.
+ *
+ * CAUTION : the various table address contained in config will be used
+ *	     directly by the interrupt mangement code in order to save
+ *	     data size so they must stay valid after the call => they should
+ *	     not be modified or declared on a stack.
+ */
+
+int BSP_rtems_irq_mngt_set(rtems_irq_global_settings* config);
+/*
+ * (Re) get info on current RTEMS interrupt management.
+ */
+int BSP_rtems_irq_mngt_get(rtems_irq_global_settings**);
+
+extern void BSP_rtems_irq_mng_init(unsigned cpuId);
+extern void BSP_i8259s_init(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+
+#endif
diff --git a/c/src/lib/libbsp/powerpc/score603e/irq/irq_init.c b/c/src/lib/libbsp/powerpc/score603e/irq/irq_init.c
new file mode 100644
index 0000000000..492e902da2
--- /dev/null
+++ b/c/src/lib/libbsp/powerpc/score603e/irq/irq_init.c
@@ -0,0 +1,364 @@
+/* irq_init.c
+ *
+ *  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.
+ *
+ * Till Straumann <strauman@slac.stanford.edu>, 12/20/2001:
+ * Use the new interface to openpic_init
+ *
+ *  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.
+ *
+ *  $Id$
+ */
+
+#include <libcpu/io.h>
+#include <libcpu/spr.h>
+#include <bsp/pci.h>
+#include <bsp/residual.h>
+#include <bsp/openpic.h>
+#include <bsp/irq.h>
+#include <bsp.h>
+#include <libcpu/raw_exception.h>
+#include <bsp/motorola.h>
+#include <rtems/bspIo.h>
+
+typedef struct {
+  unsigned char bus;	/* few chance the PCI/ISA bridge is not on first bus but ... */
+  unsigned char device;
+  unsigned char function;
+} pci_isa_bridge_device;
+
+pci_isa_bridge_device* via_82c586 = 0;
+static pci_isa_bridge_device bridge;
+
+extern unsigned int external_exception_vector_prolog_code_size[];
+extern void external_exception_vector_prolog_code();
+extern unsigned int decrementer_exception_vector_prolog_code_size[];
+extern void decrementer_exception_vector_prolog_code();
+
+/*
+ * default on/off function
+ */
+static void nop_func(){}
+/*
+ * default isOn function
+ */
+static int not_connected() {return 0;}
+/*
+ * default possible isOn function
+ */
+static int connected() {return 1;}
+
+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, 			 nop_func	, NULL		, nop_func	, nop_func	, not_connected
+};
+static rtems_irq_prio irqPrioTable[BSP_IRQ_NUMBER]={
+  /*
+   * actual priorities for interrupt :
+   *	0   means that only current interrupt is masked
+   *	255 means all other interrupts are masked
+   */
+  /*
+   * ISA interrupts.
+   * The second entry has a priority of 255 because
+   * it is the slave pic entry and should always remain
+   * unmasked.
+   */
+  0,0,
+  255,
+  0, 0, 0, 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+  /*
+   * PCI Interrupts
+   */
+  8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, /* for raven prio 0 means unactive... */
+  /*
+   * Processor exceptions handled as interrupts
+   */
+  0
+};
+
+#if defined(mvme2100)
+static unsigned char mvme2100_openpic_initpolarities[16] = {
+    0,  /* Not used - should be disabled */
+    0,	/* DEC21143 Controller */
+    0,  /* PMC/PC-MIP Type I Slot 0 */
+    0,  /* PC-MIP Type I Slot 1 */
+    0,  /* PC-MIP Type II Slot 0 */
+    0,  /* PC-MIP Type II Slot 1 */
+    0,  /* Not used - should be disabled */
+    0,  /* PCI Expansion Interrupt A/Universe II (LINT0) */
+    0,  /* PCI Expansion Interrupt B/Universe II (LINT1) */
+    0,  /* PCI Expansion Interrupt C/Universe II (LINT2) */
+    0,  /* PCI Expansion Interrupt D/Universe II (LINT3) */
+    0,  /* Not used - should be disabled */
+    0,  /* Not used - should be disabled */
+    1,  /* 16550 UART */
+    0,  /* Front panel Abort Switch */
+    0,  /* RTC IRQ */
+};
+
+static unsigned char mvme2100_openpic_initsenses[] = {
+    0,  /* Not used - should be disabled */
+    1,	/* DEC21143 Controller */
+    1,  /* PMC/PC-MIP Type I Slot 0 */
+    1,  /* PC-MIP Type I Slot 1 */
+    1,  /* PC-MIP Type II Slot 0 */
+    1,  /* PC-MIP Type II Slot 1 */
+    0,  /* Not used - should be disabled */
+    1,  /* PCI Expansion Interrupt A/Universe II (LINT0) */
+    1,  /* PCI Expansion Interrupt B/Universe II (LINT1) */
+    1,  /* PCI Expansion Interrupt C/Universe II (LINT2) */
+    1,  /* PCI Expansion Interrupt D/Universe II (LINT3) */
+    0,  /* Not used - should be disabled */
+    0,  /* Not used - should be disabled */
+    1,  /* 16550 UART */
+    0,  /* Front panel Abort Switch */
+    1,  /* RTC IRQ */
+};
+#else
+static unsigned char mcp750_openpic_initpolarities[16] = {
+    1,  /* 8259 cascade */
+    0,	/* all the rest of them */
+};
+
+static unsigned char mcp750_openpic_initsenses[] = {
+    1,	/* MCP750_INT_PCB(8259) */
+    0,	/* MCP750_INT_FALCON_ECC_ERR */
+    1,	/* MCP750_INT_PCI_ETHERNET */
+    1,	/* MCP750_INT_PCI_PMC */
+    1,	/* MCP750_INT_PCI_WATCHDOG_TIMER1 */
+    1,	/* MCP750_INT_PCI_PRST_SIGNAL */
+    1,	/* MCP750_INT_PCI_FALL_SIGNAL */
+    1,	/* MCP750_INT_PCI_DEG_SIGNAL */
+    1,	/* MCP750_INT_PCI_BUS1_INTA */
+    1,	/* MCP750_INT_PCI_BUS1_INTB */
+    1,	/* MCP750_INT_PCI_BUS1_INTC */
+    1,	/* MCP750_INT_PCI_BUS1_INTD */
+    1,	/* MCP750_INT_PCI_BUS2_INTA */
+    1,	/* MCP750_INT_PCI_BUS2_INTB */
+    1,	/* MCP750_INT_PCI_BUS2_INTC */
+    1,	/* MCP750_INT_PCI_BUS2_INTD */
+};
+#endif
+
+void VIA_isa_bridge_interrupts_setup(void)
+{
+  pci_isa_bridge_device pci_dev;
+  unsigned int temp;
+  unsigned char tmp;
+  unsigned char maxBus;
+  unsigned found = 0;
+
+  maxBus = BusCountPCI();
+  pci_dev.function 	= 0; /* Assumes the bidge is the first function */
+
+  for (pci_dev.bus = 0; pci_dev.bus < maxBus; pci_dev.bus++) {
+#ifdef SCAN_PCI_PRINT
+    printk("isa_bridge_interrupts_setup: Scanning bus %d\n", pci_dev.bus);
+#endif
+    for (pci_dev.device = 0; pci_dev.device < PCI_MAX_DEVICES; pci_dev.device++) {
+#ifdef SCAN_PCI_PRINT
+      printk("isa_bridge_interrupts_setup: Scanning device %d\n", pci_dev.device);
+#endif
+      pci_read_config_dword(pci_dev.bus, pci_dev.device,  pci_dev.function,
+			       PCI_VENDOR_ID, &temp);
+#ifdef SCAN_PCI_PRINT
+      printk("Vendor/device = %x\n", temp);
+#endif
+      if ((temp == (((unsigned short) PCI_VENDOR_ID_VIA) | (PCI_DEVICE_ID_VIA_82C586_0 << 16)))
+	 ) {
+	bridge = pci_dev;
+	via_82c586 = &bridge;
+#ifdef SHOW_ISA_PCI_BRIDGE_SETTINGS
+	/*
+	 * Should print : bus = 0, device = 11, function = 0 on a MCP750.
+	 */
+	printk("Via PCI/ISA bridge found at bus = %d, device = %d, function = %d\n",
+	       via_82c586->bus,
+	       via_82c586->device,
+	       via_82c586->function);
+#endif
+	found = 1;
+	goto loop_exit;
+
+      }
+    }
+  }
+loop_exit:
+  if (!found) BSP_panic("VIA_82C586 PCI/ISA bridge not found!n");
+
+  tmp = inb(0x810);
+  if  ( !(tmp & 0x2)) {
+#ifdef SHOW_ISA_PCI_BRIDGE_SETTINGS
+    printk("This is a second generation MCP750 board\n");
+    printk("We must reprogram the PCI/ISA bridge...\n");
+#endif
+    pci_read_config_byte(via_82c586->bus, via_82c586->device, via_82c586->function,
+			 0x47,  &tmp);
+#ifdef SHOW_ISA_PCI_BRIDGE_SETTINGS
+    printk(" PCI ISA bridge control2 = %x\n", (unsigned) tmp);
+#endif
+    /*
+     * Enable 4D0/4D1 ISA interrupt level/edge config registers
+     */
+    tmp |= 0x20;
+    pci_write_config_byte(via_82c586->bus, via_82c586->device, via_82c586->function,
+			  0x47, tmp);
+    /*
+     * Now program the ISA interrupt edge/level
+     */
+    tmp = ELCRS_INT9_LVL | ELCRS_INT10_LVL | ELCRS_INT11_LVL;
+    outb(tmp, ISA8259_S_ELCR);
+    tmp = ELCRM_INT5_LVL;
+    outb(tmp, ISA8259_M_ELCR);;
+    /*
+     * Set the Interrupt inputs to non-inverting level interrupt
+     */
+    pci_read_config_byte(via_82c586->bus, via_82c586->device, via_82c586->function,
+			    0x54, &tmp);
+#ifdef SHOW_ISA_PCI_BRIDGE_SETTINGS
+    printk(" PCI ISA bridge PCI/IRQ Edge/Level Select = %x\n", (unsigned) tmp);
+#endif
+    tmp = 0;
+    pci_write_config_byte(via_82c586->bus, via_82c586->device, via_82c586->function,
+			  0x54, tmp);
+  }
+  else {
+#ifdef SHOW_ISA_PCI_BRIDGE_SETTINGS
+    printk("This is a first generation MCP750 board\n");
+    printk("We just show the actual value used by PCI/ISA bridge\n");
+#endif
+    pci_read_config_byte(via_82c586->bus, via_82c586->device, via_82c586->function,
+			 0x47,  &tmp);
+#ifdef SHOW_ISA_PCI_BRIDGE_SETTINGS
+    printk(" PCI ISA bridge control2 = %x\n", (unsigned) tmp);
+#endif
+    /*
+     * Show the Interrupt inputs inverting/non-inverting level status
+     */
+    pci_read_config_byte(via_82c586->bus, via_82c586->device, via_82c586->function,
+			 0x54, &tmp);
+#ifdef SHOW_ISA_PCI_BRIDGE_SETTINGS
+    printk(" PCI ISA bridge PCI/IRQ Edge/Level Select = %x\n", (unsigned) tmp);
+#endif
+  }
+}
+
+  /*
+   * 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)
+{
+#if !defined(mvme2100)
+  int known_cpi_isa_bridge = 0;
+#endif
+  rtems_raw_except_connect_data vectorDesc;
+  int i;
+
+  /*
+   * First initialize the Interrupt management hardware
+   */
+#if defined(mvme2100)
+#ifdef TRACE_IRQ_INIT 
+  printk("Going to initialize EPIC interrupt controller (openpic compliant)\n");
+#endif
+  openpic_init(1, mvme2100_openpic_initpolarities, mvme2100_openpic_initsenses);
+#else
+#ifdef TRACE_IRQ_INIT 
+  printk("Going to initialize raven interrupt controller (openpic compliant)\n");
+#endif
+  openpic_init(1, mcp750_openpic_initpolarities, mcp750_openpic_initsenses);
+#endif       
+
+#if !defined(mvme2100)
+#ifdef TRACE_IRQ_INIT  
+  printk("Going to initialize the PCI/ISA bridge IRQ related setting (VIA 82C586)\n");
+#endif
+  if ( currentBoard == MESQUITE ) {
+    VIA_isa_bridge_interrupts_setup();
+    known_cpi_isa_bridge = 1;
+  }
+  if ( currentBoard == MVME_2300 ) {
+    /* nothing to do for W83C553 bridge */
+    known_cpi_isa_bridge = 1;
+  }
+  if ( currentBoard == MTX_WO_PP || currentBoard == MTX_W_PP ) {
+     /* W83C554, don't to anything at the moment.  gregm 11/6/2002 */
+     known_cpi_isa_bridge = 1;
+  }
+
+  if (!known_cpi_isa_bridge) {
+    printk("Please add code for PCI/ISA bridge init to libbsp/powerpc/shared/irq/irq_init.c\n");
+    printk("If your card works correctly please add a test and set known_cpi_isa_bridge to true\n");
+    printk("currentBoard = %i\n", currentBoard);
+  }
+#ifdef TRACE_IRQ_INIT
+  printk("Going to initialize the ISA PC legacy IRQ management hardware\n");
+#endif
+  BSP_i8259s_init();
+#endif
+
+  /*
+   * 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_ASM_IRQ_VECTOR_BASE;
+    initial_config.irqPrioTbl	= irqPrioTable;
+
+    if (!BSP_rtems_irq_mngt_set(&initial_config)) {
+      /*
+       * put something here that will show the failure...
+       */
+      BSP_panic("Unable to initialize RTEMS interrupt Management!!! System locked\n");
+    }
+
+  /*
+   * We must connect the raw irq handler for the two
+   * expected interrupt sources : decrementer and external interrupts.
+   */
+    vectorDesc.exceptIndex 	=	ASM_DEC_VECTOR;
+    vectorDesc.hdl.vector	=	ASM_DEC_VECTOR;
+    vectorDesc.hdl.raw_hdl	=	decrementer_exception_vector_prolog_code;
+    vectorDesc.hdl.raw_hdl_size	=	(unsigned) decrementer_exception_vector_prolog_code_size;
+    vectorDesc.on		=	nop_func;
+    vectorDesc.off		=	nop_func;
+    vectorDesc.isOn		=	connected;
+    if (!mpc60x_set_exception (&vectorDesc)) {
+      BSP_panic("Unable to initialize RTEMS decrementer raw exception\n");
+    }
+    vectorDesc.exceptIndex	=	ASM_EXT_VECTOR;
+    vectorDesc.hdl.vector	=	ASM_EXT_VECTOR;
+    vectorDesc.hdl.raw_hdl	=	external_exception_vector_prolog_code;
+    vectorDesc.hdl.raw_hdl_size	=	(unsigned) external_exception_vector_prolog_code_size;
+    if (!mpc60x_set_exception (&vectorDesc)) {
+      BSP_panic("Unable to initialize RTEMS external raw exception\n");
+    }
+#ifdef TRACE_IRQ_INIT
+    printk("RTEMS IRQ management is now operational\n");
+#endif
+}