diff packages/hal/i386/pc/current/src/hal_startup.c @ 76:435cced73e2f ecos-v1_3_1-release

eCos v1.3.1 merged from eCos master repository on 2000-03-27-23:22:51-BST
author jlarmour
date Tue, 28 Mar 2000 14:10:45 +0000
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+//=============================================================================
+//
+//      hal_startup.c
+//
+//      HAL bootstrap code
+//
+//=============================================================================
+//####COPYRIGHTBEGIN####
+//                                                                          
+// -------------------------------------------                              
+// The contents of this file are subject to the Red Hat eCos Public License 
+// Version 1.1 (the "License"); you may not use this file except in         
+// compliance with the License.  You may obtain a copy of the License at    
+// http://www.redhat.com/                                                   
+//                                                                          
+// Software distributed under the License is distributed on an "AS IS"      
+// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the 
+// License for the specific language governing rights and limitations under 
+// the License.                                                             
+//                                                                          
+// The Original Code is eCos - Embedded Configurable Operating System,      
+// released September 30, 1998.                                             
+//                                                                          
+// The Initial Developer of the Original Code is Red Hat.                   
+// Portions created by Red Hat are                                          
+// Copyright (C) 1998, 1999, 2000 Red Hat, Inc.                             
+// All Rights Reserved.                                                     
+// -------------------------------------------                              
+//                                                                          
+//####COPYRIGHTEND####
+//=============================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):   proven
+// Contributors:proven, jskov
+// Date:        1998-10-06
+// Purpose:     HAL diagnostic output
+// Description: Implementations of HAL diagnostic output support.
+//
+//####DESCRIPTIONEND####
+//
+//=============================================================================
+
+#include <pkgconf/hal.h>
+
+#ifdef CYGPKG_KERNEL
+#include <pkgconf/kernel.h>
+#include <cyg/kernel/kapi.h>            // cyg_scheduler_lock
+#endif
+
+#include <cyg/hal/hal_intr.h>           // interrupt stuff
+#include <cyg/hal/hal_arch.h>           // Architecture specific definitions
+
+#include <cyg/infra/diag.h>             // diag_printf
+#include <cyg/infra/cyg_ass.h>          // ASSERTION macros
+
+
+//----------------------------------------------------------------------------
+// ISR tables
+volatile CYG_ADDRESS    cyg_hal_interrupt_handlers[CYGNUM_HAL_ISR_COUNT];
+volatile CYG_ADDRWORD   cyg_hal_interrupt_data[CYGNUM_HAL_ISR_COUNT];
+volatile CYG_ADDRESS    cyg_hal_interrupt_objects[CYGNUM_HAL_ISR_COUNT];
+
+// VSR table
+volatile CYG_ADDRESS    cyg_hal_vsr_table[CYGNUM_HAL_VSR_COUNT];
+
+// Interrupts start disabled
+volatile int            cyg_hal_interrupts_disabled = 1;
+volatile int            cyg_hal_interrupts_deferred;
+volatile int            cyg_hal_interrupts_unhandled[CYGNUM_HAL_ISR_COUNT];
+
+//-----------------------------------------------------------------------------
+
+typedef cyg_uint32 (*callsig_t)(int vector, cyg_uint32);
+
+externC void interrupt_end(CYG_ADDRESS, CYG_ADDRESS, CYG_ADDRESS);
+extern volatile cyg_uint32 cyg_scheduler_sched_lock;
+
+externC void cyg_hal_default_interrupt_vsr(int vector)
+{
+    callsig_t func;
+    cyg_uint32 ret;
+
+    if (cyg_hal_interrupts_disabled) {
+        cyg_hal_interrupts_unhandled[vector] = 1; 
+        cyg_hal_interrupts_deferred = 1;
+        return;
+    }
+
+#ifdef CYGFUN_HAL_COMMON_KERNEL_SUPPORT
+    // Increment the scheduler lock when the kernel is present.
+    cyg_scheduler_sched_lock++;
+#endif
+
+    cyg_hal_interrupts_unhandled[vector] = 0; 
+    func = (callsig_t) cyg_hal_interrupt_handlers[vector];
+    ret = func(vector, cyg_hal_interrupt_data[vector]);
+
+#ifdef CYGFUN_HAL_COMMON_KERNEL_SUPPORT
+    // We only need to call _interrupt_end() when there is a kernel
+    // present to do any tidying up.
+    interrupt_end(ret, cyg_hal_interrupt_objects[vector], (CYG_ADDRESS) NULL);
+#endif
+}
+
+externC void cyg_hal_default_exception_vsr(int vector)
+{
+#if defined(CYGFUN_HAL_COMMON_KERNEL_SUPPORT) && \
+    defined(CYGPKG_HAL_EXCEPTIONS)
+
+    {
+        int __pre_state = cyg_hal_interrupts_disabled++;
+
+        cyg_hal_deliver_exception( vector, 0 );
+
+        cyg_hal_interrupts_disabled = __pre_state;
+    }
+
+#else
+
+    CYG_FAIL("Exception!!!");
+    
+#endif    
+}
+
+//---------------------------------------------------------------------------
+// Default ISR
+
+externC cyg_uint32
+cyg_hal_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
+{
+    diag_printf("Interrupt: %d\n", vector);
+
+    CYG_FAIL("Spurious Interrupt!!!");
+    return 0;
+}
+
+//-----------------------------------------------------------------------------
+// Initialization on the VSRs.
+
+externC void cyg_hal_isr_init(void)
+{
+    int i;
+
+    // ISR setup
+    for (i = 0; i < CYGNUM_HAL_ISR_COUNT; i++) {
+        cyg_hal_interrupt_handlers[i] = (CYG_ADDRESS) &cyg_hal_default_isr;
+    }
+
+}
+
+//-----------------------------------------------------------------------------
+// End of hal_startup.c