source: trunk/hal/generic/hal_exception.h @ 480

Last change on this file since 480 was 480, checked in by viala@…, 3 years ago

[hal/generic] Add void type to function prototypes with no parameter

File size: 2.5 KB
Line 
1/*
2 * hal_exception.c - Architecture specific exception handler API definition
3 *
4 * Authors    Alain Greiner (2016,2017)
5 *
6 * Copyright (c) UPMC Sorbonne Universites
7 *
8 * This file is part of ALMOS-MKH.
9 *
10 * ALMOS-MKH is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; version 2.0 of the License.
13 *
14 * ALMOS-MKH is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with ALMOS-MKH; if not, write to the Free Software Foundation,
21 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24#ifndef _HAL_EXCEPTION_H_
25#define _HAL_EXCEPTION_H_
26
27#include <hal_kernel_types.h>
28
29//////////////////////////////////////////////////////////////////////////////////////////
30//     Architecture specific exception handler API
31//
32// ALMOS-MKH defines three classes of exceptions:
33//
34// - NON_FATAL : exceptions such as "page unmapped" or "FPU unusable" can be non fatal.
35//   => The hal_do_exception() function call the generic vmm_handle_page_fault(),
36//      or the fpu_handle_exception() function, and the calling thread resumes execution
37//      when the exception has been handled.
38//
39// - USER_ERROR : exceptions such a "illegal vaddr" or "illegal write access" are fatal.
40//   => The hal_do_exception() function send a kill signal to the calling thread process,
41//      and displays an error message on TXT0.
42//
43// - KERNEL_PANIC : "kernel mistakes" are abnormal events.
44//   => The hal_do_exception() function calls the generic panic() function, to display
45//      a message on TXT0, disable IRQs and call the hal_core_sleep() function.
46//
47// For all exceptions, the faulty core registers have been saved in the "uzone"
48// that can be accessed through the "uzone" pointer stored in thread descriptor.
49//////////////////////////////////////////////////////////////////////////////////////////
50
51
52/*****************************************************************************************
53 * This function is called by the hal_kentry() function when an exception is detected by
54 * the hardware for a given thread running on a given core.
55 ****************************************************************************************/
56void hal_do_exception( void );
57
58#endif  // _HAL_EXCEPTION_H_
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