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Diffstat (limited to '')
-rw-r--r-- | src/VBox/Runtime/r0drv/os2/alloc-r0drv-os2.cpp | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r0drv/os2/alloc-r0drv-os2.cpp b/src/VBox/Runtime/r0drv/os2/alloc-r0drv-os2.cpp new file mode 100644 index 00000000..91bbe5d0 --- /dev/null +++ b/src/VBox/Runtime/r0drv/os2/alloc-r0drv-os2.cpp @@ -0,0 +1,131 @@ +/* $Id: alloc-r0drv-os2.cpp $ */ +/** @file + * IPRT - Memory Allocation, Ring-0 Driver, OS/2. + */ + +/* + * Contributed by knut st. osmundsen. + * + * Copyright (C) 2007-2020 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. + * -------------------------------------------------------------------- + * + * 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/iprt.h" +#include <iprt/mem.h> + +#include <iprt/assert.h> +#include <iprt/errcore.h> +#include <iprt/param.h> +#include "r0drv/alloc-r0drv.h" /** @todo drop the r0drv/alloc-r0drv.cpp stuff on OS/2? */ + + +DECLHIDDEN(int) rtR0MemAllocEx(size_t cb, uint32_t fFlags, PRTMEMHDR *ppHdr) +{ + if (fFlags & RTMEMHDR_FLAG_ANY_CTX) + return VERR_NOT_SUPPORTED; + + void *pv = NULL; + APIRET rc = KernVMAlloc(cb + sizeof(RTMEMHDR), VMDHA_FIXED, &pv, (void **)-1, NULL); + if (RT_UNLIKELY(rc != NO_ERROR)) + return RTErrConvertFromOS2(rc); + + PRTMEMHDR pHdr = (PRTMEMHDR)pv; + pHdr->u32Magic = RTMEMHDR_MAGIC; + pHdr->fFlags = fFlags; + pHdr->cb = cb; + pHdr->cbReq = cb; + *ppHdr = pHdr; + return VINF_SUCCESS; +} + + +DECLHIDDEN(void) rtR0MemFree(PRTMEMHDR pHdr) +{ + pHdr->u32Magic += 1; + APIRET rc = KernVMFree(pHdr); + Assert(!rc); NOREF(rc); +} + + +RTR0DECL(void *) RTMemContAlloc(PRTCCPHYS pPhys, size_t cb) +{ + /* + * Validate input. + */ + AssertPtr(pPhys); + Assert(cb > 0); + + /* + * All physical memory in OS/2 is below 4GB, so this should be kind of easy. + */ + cb = RT_ALIGN_Z(cb, PAGE_SIZE); /* -> page aligned result. */ + PVOID pv = NULL; + PVOID PhysAddr = (PVOID)~0UL; + APIRET rc = KernVMAlloc(cb, VMDHA_FIXED | VMDHA_CONTIG, &pv, &PhysAddr, NULL); + if (!rc) + { + Assert(PhysAddr != (PVOID)~0UL); + Assert(!((uintptr_t)pv & PAGE_OFFSET_MASK)); + *pPhys = (uintptr_t)PhysAddr; + return pv; + } + return NULL; +} + + +RTR0DECL(void) RTMemContFree(void *pv, size_t cb) +{ + if (pv) + { + AssertMsg(!((uintptr_t)pv & PAGE_OFFSET_MASK), ("pv=%p\n", pv)); + KernVMFree(pv); + } +} + |