| 1 | /* $Id: alloc-r0drv-os2.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - Memory Allocation, Ring-0 Driver, OS/2.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Contributed by knut st. osmundsen.
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| 8 | *
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| 9 | * Copyright (C) 2007-2020 Oracle Corporation
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| 10 | *
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| 11 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 12 | * available from http://www.virtualbox.org. This file is free software;
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| 13 | * you can redistribute it and/or modify it under the terms of the GNU
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| 14 | * General Public License (GPL) as published by the Free Software
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| 15 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 16 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 17 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 18 | *
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| 19 | * The contents of this file may alternatively be used under the terms
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| 20 | * of the Common Development and Distribution License Version 1.0
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| 21 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 22 | * VirtualBox OSE distribution, in which case the provisions of the
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| 23 | * CDDL are applicable instead of those of the GPL.
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| 24 | *
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| 25 | * You may elect to license modified versions of this file under the
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| 26 | * terms and conditions of either the GPL or the CDDL or both.
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| 27 | * --------------------------------------------------------------------
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| 28 | *
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| 29 | * This code is based on:
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| 30 | *
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| 31 | * Copyright (c) 2007 knut st. osmundsen <[email protected]>
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| 32 | *
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| 33 | * Permission is hereby granted, free of charge, to any person
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| 34 | * obtaining a copy of this software and associated documentation
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| 35 | * files (the "Software"), to deal in the Software without
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| 36 | * restriction, including without limitation the rights to use,
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| 37 | * copy, modify, merge, publish, distribute, sublicense, and/or sell
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| 38 | * copies of the Software, and to permit persons to whom the
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| 39 | * Software is furnished to do so, subject to the following
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| 40 | * conditions:
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| 41 | *
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| 42 | * The above copyright notice and this permission notice shall be
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| 43 | * included in all copies or substantial portions of the Software.
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| 44 | *
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| 45 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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| 46 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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| 47 | * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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| 48 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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| 49 | * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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| 50 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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| 51 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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| 52 | * OTHER DEALINGS IN THE SOFTWARE.
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| 53 | */
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| 54 |
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| 55 |
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| 56 | /*********************************************************************************************************************************
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| 57 | * Header Files *
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| 58 | *********************************************************************************************************************************/
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| 59 | #include "the-os2-kernel.h"
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| 60 | #include "internal/iprt.h"
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| 61 | #include <iprt/mem.h>
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| 62 |
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| 63 | #include <iprt/assert.h>
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| 64 | #include <iprt/errcore.h>
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| 65 | #include <iprt/param.h>
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| 66 | #include "r0drv/alloc-r0drv.h" /** @todo drop the r0drv/alloc-r0drv.cpp stuff on OS/2? */
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| 67 |
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| 68 |
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| 69 | DECLHIDDEN(int) rtR0MemAllocEx(size_t cb, uint32_t fFlags, PRTMEMHDR *ppHdr)
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| 70 | {
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| 71 | if (fFlags & RTMEMHDR_FLAG_ANY_CTX)
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| 72 | return VERR_NOT_SUPPORTED;
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| 73 |
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| 74 | void *pv = NULL;
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| 75 | APIRET rc = KernVMAlloc(cb + sizeof(RTMEMHDR), VMDHA_FIXED, &pv, (void **)-1, NULL);
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| 76 | if (RT_UNLIKELY(rc != NO_ERROR))
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| 77 | return RTErrConvertFromOS2(rc);
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| 78 |
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| 79 | PRTMEMHDR pHdr = (PRTMEMHDR)pv;
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| 80 | pHdr->u32Magic = RTMEMHDR_MAGIC;
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| 81 | pHdr->fFlags = fFlags;
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| 82 | pHdr->cb = cb;
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| 83 | pHdr->cbReq = cb;
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| 84 | *ppHdr = pHdr;
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| 85 | return VINF_SUCCESS;
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| 86 | }
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| 87 |
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| 88 |
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| 89 | DECLHIDDEN(void) rtR0MemFree(PRTMEMHDR pHdr)
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| 90 | {
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| 91 | pHdr->u32Magic += 1;
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| 92 | APIRET rc = KernVMFree(pHdr);
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| 93 | Assert(!rc); NOREF(rc);
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| 94 | }
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| 95 |
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| 96 |
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| 97 | RTR0DECL(void *) RTMemContAlloc(PRTCCPHYS pPhys, size_t cb)
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| 98 | {
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| 99 | /*
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| 100 | * Validate input.
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| 101 | */
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| 102 | AssertPtr(pPhys);
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| 103 | Assert(cb > 0);
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| 104 |
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| 105 | /*
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| 106 | * All physical memory in OS/2 is below 4GB, so this should be kind of easy.
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| 107 | */
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| 108 | cb = RT_ALIGN_Z(cb, PAGE_SIZE); /* -> page aligned result. */
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| 109 | PVOID pv = NULL;
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| 110 | PVOID PhysAddr = (PVOID)~0UL;
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| 111 | APIRET rc = KernVMAlloc(cb, VMDHA_FIXED | VMDHA_CONTIG, &pv, &PhysAddr, NULL);
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| 112 | if (!rc)
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| 113 | {
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| 114 | Assert(PhysAddr != (PVOID)~0UL);
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| 115 | Assert(!((uintptr_t)pv & PAGE_OFFSET_MASK));
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| 116 | *pPhys = (uintptr_t)PhysAddr;
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| 117 | return pv;
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| 118 | }
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| 119 | return NULL;
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| 120 | }
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| 121 |
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| 122 |
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| 123 | RTR0DECL(void) RTMemContFree(void *pv, size_t cb)
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| 124 | {
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| 125 | if (pv)
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| 126 | {
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| 127 | AssertMsg(!((uintptr_t)pv & PAGE_OFFSET_MASK), ("pv=%p\n", pv));
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| 128 | KernVMFree(pv);
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| 129 | }
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| 130 | }
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| 131 |
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