| 1 | /* $Id: alloc-r0drv-darwin.cpp 4071 2007-08-07 17:07:59Z vboxsync $ */
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| 2 | /** @file
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| 3 | * innotek Portable Runtime - Memory Allocation, Ring-0 Driver, Darwin.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2006-2007 innotek GmbH
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License as published by the Free Software Foundation,
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| 13 | * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
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| 14 | * distribution. VirtualBox OSE is distributed in the hope that it will
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| 15 | * be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | */
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| 17 |
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| 18 |
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| 19 | /*******************************************************************************
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| 20 | * Header Files *
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| 21 | *******************************************************************************/
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| 22 | #include "the-darwin-kernel.h"
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| 23 |
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| 24 | #include <iprt/alloc.h>
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| 25 | #include <iprt/assert.h>
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| 26 | #include "r0drv/alloc-r0drv.h"
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| 27 |
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| 28 |
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| 29 | /**
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| 30 | * OS specific allocation function.
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| 31 | */
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| 32 | PRTMEMHDR rtMemAlloc(size_t cb, uint32_t fFlags)
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| 33 | {
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| 34 | Assert(cb != sizeof(void *)); /* 99% of pointer sized allocations are wrong. */
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| 35 | PRTMEMHDR pHdr = (PRTMEMHDR)IOMalloc(cb + sizeof(*pHdr));
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| 36 | if (pHdr)
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| 37 | {
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| 38 | pHdr->u32Magic = RTMEMHDR_MAGIC;
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| 39 | pHdr->fFlags = fFlags;
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| 40 | pHdr->cb = cb;
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| 41 | pHdr->u32Padding= 0;
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| 42 | }
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| 43 | else
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| 44 | printf("rmMemAlloc(%#x, %#x) failed\n", cb + sizeof(*pHdr), fFlags);
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| 45 | return pHdr;
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| 46 | }
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| 47 |
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| 48 |
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| 49 | /**
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| 50 | * OS specific free function.
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| 51 | */
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| 52 | void rtMemFree(PRTMEMHDR pHdr)
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| 53 | {
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| 54 | pHdr->u32Magic += 1;
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| 55 | IOFree(pHdr, pHdr->cb + sizeof(*pHdr));
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| 56 | }
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| 57 |
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| 58 |
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| 59 | RTR0DECL(void *) RTMemContAlloc(PRTCCPHYS pPhys, size_t cb)
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| 60 | {
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| 61 | /*
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| 62 | * validate input.
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| 63 | */
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| 64 | AssertPtr(pPhys);
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| 65 | Assert(cb > 0);
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| 66 |
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| 67 | /*
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| 68 | * Allocate the memory and ensure that the API is still providing
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| 69 | * memory that's always below 4GB.
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| 70 | */
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| 71 | cb = RT_ALIGN_Z(cb, PAGE_SIZE);
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| 72 | IOPhysicalAddress PhysAddr;
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| 73 | void *pv = IOMallocContiguous(cb, PAGE_SIZE, &PhysAddr);
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| 74 | if (pv)
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| 75 | {
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| 76 | if (PhysAddr + (cb - 1) <= (IOPhysicalAddress)0xffffffff)
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| 77 | {
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| 78 | if (!((uintptr_t)pv & PAGE_OFFSET_MASK))
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| 79 | {
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| 80 | *pPhys = PhysAddr;
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| 81 | return pv;
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| 82 | }
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| 83 | AssertMsgFailed(("IOMallocContiguous didn't return a page aligned address - %p!\n", pv));
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| 84 | }
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| 85 | else
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| 86 | AssertMsgFailed(("IOMallocContiguous returned high address! PhysAddr=%RX64 cb=%#zx\n", (uint64_t)PhysAddr, cb));
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| 87 | IOFreeContiguous(pv, cb);
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| 88 | }
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| 89 | return NULL;
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| 90 | }
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| 91 |
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| 92 |
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| 93 | RTR0DECL(void) RTMemContFree(void *pv, size_t cb)
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| 94 | {
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| 95 | if (pv)
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| 96 | {
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| 97 | Assert(cb > 0);
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| 98 | AssertMsg(!((uintptr_t)pv & PAGE_OFFSET_MASK), ("pv=%p\n", pv));
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| 99 |
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| 100 | cb = RT_ALIGN_Z(cb, PAGE_SIZE);
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| 101 | IOFreeContiguous(pv, cb);
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| 102 | }
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| 103 | }
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| 104 |
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