/* $Id: alloc-r0drv-freebsd.c $ */
/** @file
 * IPRT - Memory Allocation, Ring-0 Driver, FreeBSD.
 */

/*
 * 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-freebsd-kernel.h"
#include "internal/iprt.h"
#include <iprt/mem.h>

#include <iprt/assert.h>
#include <iprt/errcore.h>
#include <iprt/param.h>

#include "r0drv/alloc-r0drv.h"


/*********************************************************************************************************************************
*   Global Variables                                                                                                             *
*********************************************************************************************************************************/
/* These two statements will define two globals and add initializers
   and destructors that will be called at load/unload time (I think). */
MALLOC_DEFINE(M_IPRTHEAP, "iprtheap", "IPRT - heap");
MALLOC_DEFINE(M_IPRTCONT, "iprtcont", "IPRT - contiguous");


DECLHIDDEN(int) rtR0MemAllocEx(size_t cb, uint32_t fFlags, PRTMEMHDR *ppHdr)
{
    size_t      cbAllocated = cb;
    PRTMEMHDR   pHdr        = (PRTMEMHDR)malloc(cb + sizeof(RTMEMHDR), M_IPRTHEAP,
                                                fFlags & RTMEMHDR_FLAG_ZEROED ? M_NOWAIT | M_ZERO : M_NOWAIT);
    if (RT_LIKELY(pHdr))
    {
        pHdr->u32Magic   = RTMEMHDR_MAGIC;
        pHdr->fFlags     = fFlags;
        pHdr->cb         = cbAllocated;
        pHdr->cbReq      = cb;

        *ppHdr = pHdr;
        return VINF_SUCCESS;
    }
    return VERR_NO_MEMORY;
}


DECLHIDDEN(void) rtR0MemFree(PRTMEMHDR pHdr)
{
    pHdr->u32Magic += 1;
    free(pHdr, M_IPRTHEAP);
}


RTR0DECL(void *) RTMemContAlloc(PRTCCPHYS pPhys, size_t cb)
{
    void *pv;

    /*
     * Validate input.
     */
    AssertPtr(pPhys);
    Assert(cb > 0);

    /*
     * This API works in pages, so no need to do any size aligning.
     */
    pv = contigmalloc(cb,                   /* size */
                      M_IPRTCONT,           /* type */
                      M_NOWAIT | M_ZERO,    /* flags */
                      0,                    /* lowest physical address*/
                      _4G-1,                /* highest physical address */
                      PAGE_SIZE,            /* alignment. */
                      0);                   /* boundary */
    if (pv)
    {
        Assert(!((uintptr_t)pv & PAGE_OFFSET_MASK));
        *pPhys = vtophys(pv);
        Assert(!(*pPhys & PAGE_OFFSET_MASK));
    }
    return pv;
}


RTR0DECL(void) RTMemContFree(void *pv, size_t cb)
{
    if (pv)
    {
        AssertMsg(!((uintptr_t)pv & PAGE_OFFSET_MASK), ("pv=%p\n", pv));
        contigfree(pv, cb, M_IPRTCONT);
    }
}