diff packages/hal/v85x/arch/current/src/hal_misc.c @ 96:b15c60e34c84

Merge from eCos master repository on 2000-06-06-05:24:42-BST
author jlarmour
date Tue, 06 Jun 2000 05:12:17 +0000
parents
children c37d3a9e1b28
line wrap: on
line diff
new file mode 100644
--- /dev/null
+++ b/packages/hal/v85x/arch/current/src/hal_misc.c
@@ -0,0 +1,211 @@
+/*==========================================================================
+//
+//      hal_misc.c
+//
+//      HAL miscellaneous functions
+//
+//==========================================================================
+//####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):    nickg, gthomas
+// Contributors: nickg, gthomas
+// Date:         1999-02-20
+// Purpose:      HAL miscellaneous functions
+// Description:  This file contains miscellaneous functions provided by the
+//               HAL.
+//
+//####DESCRIPTIONEND####
+//
+//=========================================================================*/
+
+#include <pkgconf/hal.h>
+#include <pkgconf/hal_v85x.h>
+#ifdef CYGPKG_KERNEL
+#include <pkgconf/kernel.h>
+#endif
+#ifdef CYGPKG_CYGMON
+#include <pkgconf/cygmon.h>
+#endif
+
+#include <cyg/infra/cyg_type.h>
+#include <cyg/infra/cyg_trac.h>         // tracing macros
+#include <cyg/infra/cyg_ass.h>          // assertion macros
+#include <cyg/infra/diag.h>
+
+#include <cyg/hal/hal_arch.h>           // HAL header
+#include <cyg/hal/hal_intr.h>           // HAL header
+
+/*------------------------------------------------------------------------*/
+/* First level C exception handler.                                       */
+
+externC void __handle_exception (void);
+
+externC HAL_SavedRegisters *_hal_registers;
+extern void *__mem_fault_handler;
+
+void
+exception_handler(HAL_SavedRegisters *regs)
+{
+#if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS) && !defined(CYGPKG_CYGMON)
+//    diag_printf("Exception! Frame: %x\n", regs);
+//    show_regs(regs);
+    static int gdb_active;
+    if (gdb_active == 0) {
+        gdb_active = 1;
+        _hal_registers = regs;
+        __handle_exception();
+        gdb_active = 0;
+    }
+
+#elif defined(CYGPKG_KERNEL_EXCEPTIONS)
+
+    // We should decode the vector and pass a more appropriate
+    // value as the second argument. For now we simply pass a
+    // pointer to the saved registers. We should also divert
+    // breakpoint and other debug vectors into the debug stubs.
+
+    cyg_hal_deliver_exception( regs->vector, (CYG_ADDRWORD)regs );
+
+#else
+
+    CYG_FAIL("Exception!!!");
+    
+#endif    
+    
+    return;
+}
+
+/*------------------------------------------------------------------------*/
+/* C++ support - run initial constructors                                 */
+
+#ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
+cyg_bool cyg_hal_stop_constructors;
+#endif
+
+typedef void (*pfunc) (void);
+extern pfunc __CTOR_LIST__[];
+extern pfunc __CTOR_END__[];
+
+void
+cyg_hal_invoke_constructors (void)
+{
+
+#ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
+    static pfunc *p = &__CTOR_END__[-1];
+    
+    cyg_hal_stop_constructors = 0;
+    for (; p >= __CTOR_LIST__; p--) {
+        (*p) ();
+        if (cyg_hal_stop_constructors) {
+            p--;
+            break;
+        }
+    }
+#else
+    pfunc *p;
+
+    for (p = &__CTOR_END__[-1]; p >= __CTOR_LIST__; p--) {
+        (*p) ();
+    }
+#endif
+}
+
+/*------------------------------------------------------------------------*/
+/* default ISR                                                            */
+
+externC cyg_uint32
+hal_default_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)
+{
+    CYG_TRACE1(true, "Interrupt: %d", vector);
+
+#ifndef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
+#ifdef CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT
+#ifdef CYGDBG_HAL_CTRLC_ISR
+    // then see if it is an incoming character interrupt and break
+    // into the stub ROM if the char is a ^C.
+    if ( CYGDBG_HAL_CTRLC_ISR( vector, data ) )
+        return 1; // interrupt handled
+#endif
+#endif
+#endif
+
+    diag_printf("Spurious Interrupt!!! - vector: %d, data: %x\n", vector, 
+                data);
+    CYG_FAIL("Spurious Interrupt!!!");
+    return 0;
+}
+
+/*------------------------------------------------------------------------*/
+/* Idle thread action                                                     */
+
+void
+hal_idle_thread_action( cyg_uint32 count )
+{
+}
+
+/*-------------------------------------------------------------------------*/
+/* Misc functions                                                          */
+
+cyg_uint32
+hal_lsbit_index(cyg_uint32 mask)
+{
+    int i;
+    for (i = 0;  i < 32;  i++) {
+      if (mask & (1<<i)) return ((cyg_uint32)i);
+    }
+    return ((cyg_uint32)-1);
+}
+
+cyg_uint32
+hal_msbit_index(cyg_uint32 mask)
+{
+    int i;
+    for (i = 32;  i >= 0;  i++) {
+      if (mask & (1<<i)) return ((cyg_uint32)i);
+    }
+    return ((cyg_uint32)-1);
+}
+
+void
+show_regs(HAL_SavedRegisters *regs)
+{
+    int i;
+    diag_printf("Regs\n");
+    for (i = 0;  i < 32;  i++) {
+        if ((i % 8) == 0) {
+            diag_printf("R%2d: ", i);
+        }
+        diag_printf("0x%08x ", regs->d[i]);
+        if ((i % 8) == 7) {
+            diag_printf("\n");
+        }
+    }
+    diag_printf("PC = %x, PSW = %x\n", regs->pc, regs->psw);
+}
+
+/*------------------------------------------------------------------------*/
+// EOF hal_misc.c