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/* $Id: initterm-r0drv-os2.cpp $ */
/** @file
* IPRT - Initialization & Termination, Ring-0 Driver, OS/2.
*/
/*
* Contributed by knut st. osmundsen.
*
* Copyright (C) 2007-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox 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.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
* --------------------------------------------------------------------
*
* This code is based on:
*
* Copyright (c) 2007 knut st. osmundsen <bird-src-spam@anduin.net>
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include "the-os2-kernel.h"
#include "internal/initterm.h"
#include <iprt/errcore.h>
#include <iprt/assert.h>
/*********************************************************************************************************************************
* Global Variables *
*********************************************************************************************************************************/
/** Pointer to the 1st DOS variable table. */
PCDOSTABLE g_pDosTable = NULL;
/** Pointer to the 2nd DOS variable table. */
PCDOSTABLE2 g_pDosTable2 = NULL;
/** Pointer to the global info segment. */
PGINFOSEG g_pGIS = NULL;
/** Far 16:16 pointer to the local info segment.
* IIRC this must be converted to a flat pointer when accessed to work correctly on SMP systems. */
RTFAR16 g_fpLIS = {0, 0};
DECLHIDDEN(int) rtR0InitNative(void)
{
/*
* Get the DOS Tables.
*/
RTFAR16 fp;
int rc = RTR0Os2DHQueryDOSVar(DHGETDOSV_DOSTABLES, 0, &fp);
AssertMsgReturn(!rc, ("rc=%d\n", rc), VERR_INTERNAL_ERROR);
g_pDosTable = (PCDOSTABLE)RTR0Os2Virt2Flat(fp);
AssertReturn(g_pDosTable, VERR_INTERNAL_ERROR);
g_pDosTable2 = (PCDOSTABLE2)((const uint8_t *)g_pDosTable + g_pDosTable->cul * sizeof(ULONG) + 1);
/*
* Get the addresses of the two info segments.
*/
rc = RTR0Os2DHQueryDOSVar(DHGETDOSV_SYSINFOSEG, 0, &fp);
AssertMsgReturn(!rc, ("rc=%d\n", rc), VERR_INTERNAL_ERROR);
g_pGIS = (PGINFOSEG)RTR0Os2Virt2Flat(fp);
rc = RTR0Os2DHQueryDOSVar(DHGETDOSV_LOCINFOSEG, 0, &fp);
AssertMsgReturn(!rc, ("rc=%d\n", rc), VERR_INTERNAL_ERROR);
g_fpLIS = fp;
return VINF_SUCCESS;
}
DECLHIDDEN(void) rtR0TermNative(void)
{
/* nothing to do here yet. */
}
/**
* Converts a 16:16 pointer to a flat pointer.
*
* @returns Flat pointer (NULL if fp is NULL).
* @param fp Far pointer to convert.
*/
RTR0DECL(void *) RTR0Os2Virt2Flat(RTFAR16 fp)
{
return (void *)KernSelToFlat(((uint32_t)fp.sel << 16) | fp.off);
}
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