/*
    MMError.c, Copyright  (c) by Lukas Ruf, lr@lpr.ch,
    Swiss Federal Institute of Technology,
    Computer Engineering and Networks Laboratory.

    TOPSY -- A Teachable Operating System.
             Implementation of a tiny and simple
             micro kernel for teaching purposes.

    For further information, please visit http://www.tik.ee.ethz.ch/~topsy

    This software is provided under the terms of the GNU General Public Licence.

    A full copy of the GNU GPL is provided in the file COPYING found in the 
    development root of Topsy.
*/
/*
	
	File:                  $Source: /usr/drwho/vault/cvs/topsy/Topsy/Memory/ia32/MMError.c,v $
 	Author(s):             Lukas Ruf, lr@lpr.ch
 	Affiliation:           ETH Zuerich, TIK
 	Version:               $Revision: 1.2 $
 	Creation Date:         
 	Last Date of Change:   $Date: 1999/12/13 21:48:30 $      by: $Author: ruf $
	
	
	$Log: MMError.c,v $
	Revision 1.2  1999/12/13 21:48:30  ruf
	GNU General Public Licence Update
	
	Revision 1.1  1999/05/13 17:05:36  jeker
	Initial revision
	
*/
#include "MMError.h"
#include "Threads.h"
#include "Messages.h"
#include "TMHal.h"


static void mmBOUNDS(ThreadId currentThread);
static void mmCoProSeg(ThreadId currentThread);
static void mmInvTSS(ThreadId currentThread);
static void mmSegNotPres(ThreadId currentThread);
static void mmStackEx(ThreadId currentThread);
static void mmPageFault(ThreadId currentThread);
static void mmAlignment(ThreadId currentThread);

static void mmError(ThreadId currentThread, char* errorString);


void mmInstallErrorHandlers(void) { 
  tmSetExceptionHandler(T_Ex_05, mmBOUNDS);
  tmSetExceptionHandler(T_Ex_09, mmCoProSeg);
  tmSetExceptionHandler(T_Ex_0A, mmInvTSS);
  tmSetExceptionHandler(T_Ex_0B, mmSegNotPres);
  tmSetExceptionHandler(T_Ex_0C, mmStackEx);
  tmSetExceptionHandler(T_Ex_0E, mmPageFault);
  tmSetExceptionHandler(T_Ex_11, mmAlignment);
}


static void mmError(ThreadId currentThread, char* errorString) {
    Message msg;
    
    msg.id = TM_KILL;
    msg.from = MMTHREADID;
    msg.msg.tmKill.id = currentThread;
    
    ERROR(errorString);
    /* immediate in-kernel delivery without syscall
     * kSend does a schedule after the message arrived
     */
    kSend(TMTHREADID, &msg); 
}

static void mmBOUNDS(ThreadId currentThread) {
  mmError(currentThread,"Boundary Check Violation");
}
static void mmCoProSeg(ThreadId currentThread) {
  mmError(currentThread,"Co-Processor Segment Overrun");
}
static void mmInvTSS(ThreadId currentThread) {
  mmError(currentThread,"Invalid Task State Segment");
}
static void mmSegNotPres(ThreadId currentThread) {
  mmError(currentThread,"Segment not Present");
}
static void mmStackEx(ThreadId currentThread) {
  mmError(currentThread,"Stack Exception");
}
static void mmPageFault(ThreadId currentThread) {
  mmError(currentThread,"Page Fault");
}
static void mmAlignment(ThreadId currentThread) {
  mmError(currentThread,"Alignment Check Error");
}