diff packages/hal/i386/linux/current/src/hal_startup.c @ 2:443894e2e912 ecos-v1_2_1-release

Block commit of eCos version 1.2.1
author jlarmour
date Tue, 11 May 1999 12:24:34 +0000
parents
children 7a6ac9edc838
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new file mode 100644
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+++ b/packages/hal/i386/linux/current/src/hal_startup.c
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+//=============================================================================
+//
+//      hal_startup.c
+//
+//      HAL bootstrap code
+//
+//=============================================================================
+//####COPYRIGHTBEGIN####
+//
+// -------------------------------------------
+// The contents of this file are subject to the Cygnus eCos Public License
+// Version 1.0 (the "License"); you may not use this file except in
+// compliance with the License.  You may obtain a copy of the License at
+// http://sourceware.cygnus.com/ecos
+// 
+// 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 Cygnus Operating System, released
+// October 31, 1998.
+// 
+// The Initial Developer of the Original Code is Cygnus.  Portions created
+// by Cygnus are Copyright (C) 1998,1999 Cygnus Solutions.  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.
+struct hal_sigaction {
+    void (*hal_handler)(int);
+    long hal_mask;
+    int hal_flags;
+    void (*hal_bogus)(int);
+} act, oact;
+extern int cyg_hal_sys_sigaction(int, const struct hal_sigaction*, 
+                                 struct hal_sigaction*);
+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;
+    }
+
+    // Interrupt VSR setup
+    act.hal_handler = cyg_hal_default_interrupt_vsr;
+    act.hal_mask = 0;
+    act.hal_flags = 0;
+    cyg_hal_sys_sigaction(CYGNUM_HAL_INTERRUPT_RTC,  &act, &oact);
+
+    // Exception VSR setup
+    act.hal_handler = cyg_hal_default_exception_vsr;
+    act.hal_mask = 0;
+    act.hal_flags = 0;
+    cyg_hal_sys_sigaction(CYGNUM_HAL_VECTOR_SIGSEGV, &act, &oact);
+    cyg_hal_sys_sigaction(CYGNUM_HAL_VECTOR_SIGBUS,  &act, &oact);
+    cyg_hal_sys_sigaction(CYGNUM_HAL_VECTOR_SIGFPE,  &act, &oact);
+}
+
+//-----------------------------------------------------------------------------
+// End of hal_startup.c