/* $Id: bs3-cpu-basic-2-pf.c32 64704 2016-11-17 22:51:41Z vboxsync $ */
/** @file
 * BS3Kit - bs3-cpu-basic-2, 32-bit C code.
 */

/*
 * Copyright (C) 2007-2016 Oracle Corporation
 *
 * This file is part of VirtualBox Open Source Edition (OSE), as
 * available from http://www.virtualbox.org. This file is free software;
 * you can redistribute it and/or modify it under the terms of the GNU
 * General Public License (GPL) as published by the Free Software
 * Foundation, in version 2 as it comes in the "COPYING" file of the
 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
 *
 * The contents of this file may alternatively be used under the terms
 * of the Common Development and Distribution License Version 1.0
 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
 * VirtualBox OSE distribution, in which case the provisions of the
 * CDDL are applicable instead of those of the GPL.
 *
 * You may elect to license modified versions of this file under the
 * terms and conditions of either the GPL or the CDDL or both.
 */


/*********************************************************************************************************************************
*   Header Files                                                                                                                 *
*********************************************************************************************************************************/
#include <bs3kit.h>
#include <iprt/asm-amd64-x86.h>


/*********************************************************************************************************************************
*   Internal Functions                                                                                                           *
*********************************************************************************************************************************/
FNBS3TESTDOMODE bs3CpuBasic2_RaiseXcpt0e_c32;




BS3_DECL_CALLBACK(uint8_t)  bs3CpuBasic2_RaiseXcpt0e_c32(uint8_t bMode)
{
    void       *pvTestUnaligned;
    uint32_t    cbTestUnaligned = _8M;
    uint32_t    cbTest;
    uint8_t    *pbTest;
    uint8_t    *pbAlias;
    int         rc;

    /*
     * Allocate a some memory we can play around with, then carve a size aligned
     * chunk out of it so we might be able to maybe play with 2/4MB pages too.
     */
    cbTestUnaligned = _8M * 2;
    while ((pvTestUnaligned = Bs3MemAlloc(BS3MEMKIND_FLAT32, cbTestUnaligned)) == NULL)
    {
        cbTestUnaligned >>= 1;
        if (cbTestUnaligned < _8K)
        {
            Bs3TestFailed("Failed to allocate memory to play around with\n");
            return 1;
        }
    }

    if ((uintptr_t)pvTestUnaligned & (cbTestUnaligned - 1))
    {
        cbTest = cbTestUnaligned >> 1;
        pbTest = (uint8_t *)(((uintptr_t)pvTestUnaligned + cbTest - 1) & ~(cbTest - 1));
    }
    else
    {
        pbTest = pvTestUnaligned;
        cbTest = cbTestUnaligned;
    }

    /*
     * Alias this memory far away from where our code and data lives.
     */
    pbAlias = (uint8_t *)UINT32_C(0xa0000000);
    rc = Bs3PagingAlias((uintptr_t)pbAlias, (uintptr_t)pbTest, cbTest, X86_PTE_P | X86_PTE_RW | X86_PTE_US);
    if (RT_SUCCESS(rc))
    {
        void *pvPte = Bs3PagingGetPte((uintptr_t)pbAlias, NULL);
        if (pvPte)
        {
            Bs3TestPrintf("RaiseXcpt0e_c32:  bMode=%#x/%#x cbTest=%#x pbTest=%p pbAlias=%p pvPte=%p\n",
                          bMode, g_bBs3CurrentMode, cbTest, pbTest, pbAlias, pvPte);

        }
        else
            Bs3TestFailed("Bs3PagingGetPte failed!\n");
        Bs3PagingUnalias((uintptr_t)pbAlias, cbTest);
    }
    else
        Bs3TestFailedF("Bs3PagingAlias failed! rc=%d\n", rc);
    Bs3MemFree(pvTestUnaligned, cbTestUnaligned);
    return 0;
}