source: vbox/trunk/src/VBox/ValidationKit/bootsectors/bs3-cpu-basic-2-pf.c32@ 64735

/* $Id: bs3-cpu-basic-2-pf.c32 64735 2016-11-22 09:14:13Z 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>


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


/**
 * Worker for bs3CpuBasic2_RaiseXcpt0e_c32 that does the actual testing.
 *
 * Caller does all the cleaning up.
 *
 * @returns Error count.
 * @param   bMode               The mode to test.
 * @param   pbTestOrg           Pointer to the actual memory allocation (low
 *                              memory) where it is identity mapped (virtual
 *                              address == physical address).  This function
 *                              will not touch paging structures here.
 * @param   pbTest              Pointer to the aliased allocation in high
 *                              memory.  This is aligned on a gigabyte boundrary
 *                              so that 1GB pages can be tested (later).
 * @param   cbTest              The size of the memory allocated for testing.
 * @param   pPgInfo             The paging info for @a pbTest.
 */
static uint8_t bs3CpuBasic2_RaiseXcpt0eWorker(uint8_t bMode, uint8_t *pbTestOrg, uint8_t *pbTest, uint32_t cbTest,
                                              PBS3PAGINGINFO4ADDR pPgInfo)
{


    return 0;
}


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;
    uint8_t     bRet = 1;
    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(0x80000000);
    rc = Bs3PagingAlias((uintptr_t)pbAlias, (uintptr_t)pbTest, cbTest, X86_PTE_P | X86_PTE_RW | X86_PTE_US);
    if (RT_SUCCESS(rc))
    {
        BS3PAGINGINFO4ADDR PgInfo;
        rc = Bs3PagingQueryAddressInfo((uintptr_t)pbTest, &PgInfo);
        if (RT_SUCCESS(rc))
        {
            /*
             * Setup a 16-bit selector for accessing the alias.
             */
            // ==> office //

            Bs3TestPrintf("RaiseXcpt0e_c32:  bMode=%#x/%#x cbTest=%#x pbTest=%p pbAlias=%p\n",
                          bMode, g_bBs3CurrentMode, cbTest, pbTest, pbAlias);
            bRet = bs3CpuBasic2_RaiseXcpt0eWorker(bMode, pbTest, pbAlias, cbTest, &PgInfo);

        }
        else
            Bs3TestFailedF("Bs3PagingQueryAddressInfo failed: %d\n", rc);
        Bs3PagingUnalias((uintptr_t)pbAlias, cbTest);
    }
    else
        Bs3TestFailedF("Bs3PagingAlias failed! rc=%d\n", rc);
    Bs3MemFree(pvTestUnaligned, cbTestUnaligned);
    return bRet;
}