excep.h

MIPS下的boottloader yamon 的源代码

/************************************************************************
 *
 *  excep.h
 *
 *  Local definitions for EXCEP module
 *
 *
 * ######################################################################
 *
 * Copyright (c) 1999-2000 MIPS Technologies, Inc. All rights reserved. 
 * 
 * Unpublished rights reserved under the Copyright Laws of the United States of 
 * America. 
 * 
 * This document contains information that is proprietary to MIPS Technologies, 
 * Inc. ("MIPS Technologies"). Any copying, modifying or use of this information 
 * (in whole or in part) which is not expressly permitted in writing by MIPS 
 * Technologies or a contractually-authorized third party is strictly 
 * prohibited. At a minimum, this information is protected under unfair 
 * competition laws and the expression of the information contained herein is 
 * protected under federal copyright laws. Violations thereof may result in 
 * criminal penalties and fines. 
 * MIPS Technologies or any contractually-authorized third party reserves the 
 * right to change the information contained in this document to improve 
 * function, design or otherwise. MIPS Technologies does not assume any 
 * liability arising out of the application or use of this information. Any 
 * license under patent rights or any other intellectual property rights owned 
 * by MIPS Technologies or third parties shall be conveyed by MIPS Technologies 
 * or any contractually-authorized third party in a separate license agreement 
 * between the parties. 
 * The information contained in this document constitutes one or more of the 
 * following: commercial computer software, commercial computer software 
 * documentation or other commercial items. If the user of this information, or 
 * any related documentation of any kind, including related technical data or 
 * manuals, is an agency, department, or other entity of the United States 
 * government ("Government"), the use, duplication, reproduction, release, 
 * modification, disclosure, or transfer of this information, or any related 
 * documentation of any kind, is restricted in accordance with Federal 
 * Acquisition Regulation 12.212 for civilian agencies and Defense Federal 
 * Acquisition Regulation Supplement 227.7202 for military agencies. The use of 
 * this information by the Government is further restricted in accordance with 
 * the terms of the license agreement(s) and/or applicable contract terms and 
 * conditions covering this information from MIPS Technologies or any 
 * contractually-authorized third party. 
 *
 ************************************************************************/

#ifndef EXCEP_H
#define EXCEP_H

/************************************************************************
 *  Include files
 ************************************************************************/

#include <sysdefs.h>
#include <excep_api.h>

/************************************************************************
 *  Definitions
*************************************************************************/


/************************************************************************
 *  Public variables
 ************************************************************************/

bool EXCEP_return_flag;

/************************************************************************
 *  Public functions
 ************************************************************************/


/************************************************************************
 *
 *                          arch_excep_init_intctrl
 *  Description :
 *  -------------
 *
 *  Initialise interrupt controller.
 *
 *  Parameters :
 *  ------------
 *
 *  Function will fill out the ic_count and ic_int parameters.
 *
 *  Return values :
 *  ---------------
 *
 *  None
 *
 ************************************************************************/
void
arch_excep_init_intctrl(
    UINT32 *ic_count,   /* Number of interrupts handled by interrupt 
			   controller (0 if no controller is available) */
    UINT32 *ic_int );   /* HW interrupt used by interrupt controller	*/


/************************************************************************
 *
 *                          arch_excep_enable_int
 *  Description :
 *  -------------
 *
 *  Enable specific source in interrupt controller
 *
 *  Return values :
 *  ---------------
 *
 *  None
 *
 ************************************************************************/
void 
arch_excep_enable_int(
    UINT32 ic_line );	/* Interrupt source				*/


/************************************************************************
 *
 *                          arch_excep_disable_int
 *  Description :
 *  -------------
 *
 *  Disable specific source in interrupt controller
 *
 *  Return values :
 *  ---------------
 *
 *  None
 *
 ************************************************************************/
void 
arch_excep_disable_int(
    UINT32 ic_line );	/* Interrupt source				*/


/************************************************************************
 *
 *                          arch_excep_pending
 *  Description :
 *  -------------
 *
 *  Return pending interrupt(s) in interrupt controller.
 *  On some platforms, all pending interrupts are returned, on other
 *  platforms only the hightest priority interrupt is returned.
 *
 *  Return values :
 *  ---------------
 *
 *  Pending interrupt(s)
 *
 ************************************************************************/
UINT32
arch_excep_pending( void );


/************************************************************************
 *
 *                          arch_excep_eoi
 *  Description :
 *  -------------
 *
 *  Perform EOI cycle for indicated interrupt
 *
 *  Return values :
 *  ---------------
 *
 *  None
 *
 ************************************************************************/
void
arch_excep_eoi(
    UINT32 index );


/************************************************************************
 *
 *                          EXCEP_exc_handler_jump
 *  Description :
 *  -------------
 *
 *  Restore context and jump to function given by parameter.
 *  The function is responsible for handling the
 *  exception and possibly issue an eret (or deret
 *  in the case of an EJTAG exception).
 *
 *  Return values :
 *  ---------------
 *
 *  None
 *
 ************************************************************************/
void
EXCEP_exc_handler_jump(
    t_EXCEP_esr handler );	/* ESR to be called			*/


/************************************************************************
 *
 *                          EXCEP_return
 *  Description :
 *  -------------
 *
 *  Entry point for code used for passing control from a registered
 *  ESR (Exception Service Routine) to the general exception handling
 *  in case the registered handler does not wish to process the exception.
 *  
 *  The address of this function is passed as a parameter in
 *  EXCEP_register_esr().
 *
 *  Return values :
 *  ---------------
 *
 *  None
 *
 ************************************************************************/
void
EXCEP_return( void );


#endif /* #ifndef EXCEP_H */