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/*
 * Copyright (c) 2012, ARM Limited. All rights reserved.
 *       
 * Redistribution and use in source and binary forms, with
 * or without modification, are permitted provided that the
 * following conditions are met:
 *     
 * Redistributions of source code must retain the above
 * copyright notice, this list of conditions and the 
 * following disclaimer.
 *
 * Redistributions in binary form must reproduce the
 * above copyright notice, this list of conditions and 
 * the following disclaimer in the documentation 
 * and/or other materials provided with the distribution.
 *      
 * Neither the name of ARM nor the names of its
 * contributors may be used to endorse or promote products
 * derived from this software without specific prior written
 * permission.                        
 */ 

#include "misc.h"
#include "virt_helpers.h"
#include "bl.h"

extern void signal_switchover(void);

unsigned is_hvc()
{
        return ((read_hsr() >> 26) == 0x12 ? TRUE : FALSE);
}

unsigned HandleHVC(vm_context * context)
{
        unsigned opcode = read_hsr() & 0xffff;
        unsigned rc = FALSE;

        switch(opcode) {

                /*
                 * HVC call to switch to the other cluster. This is done
                 * by sending a switchover IPI to all the cores in the cluster.
                 */     
        case SYNC_SWITCHOVER:
                signal_switchover();
                rc = TRUE;
                break;

                /*
                 * HVC call to return the physical MPIDR
                 */
        case READ_MPIDR:
                context->gp_regs[0] = read_mpidr();
                rc = TRUE;
                break;

        default:
                break;

        }

        return rc;
}