112 lines
2.5 KiB
C
112 lines
2.5 KiB
C
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/*++
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Copyright (c) 2001 Microsoft Corporation
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Module Name:
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physical.c
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Abstract:
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This module implements the XBOX physical memory management services.
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--*/
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#include "basedll.h"
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#pragma hdrstop
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LPVOID
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WINAPI
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XPhysicalAlloc(
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IN SIZE_T dwSize,
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IN ULONG_PTR ulPhysicalAddress,
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IN ULONG_PTR ulAlignment,
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IN DWORD flProtect
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)
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{
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ULONG ulLowestAcceptableAddress;
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ULONG ulHighestAcceptableAddress;
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LPVOID lpAddress;
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RIP_ON_NOT_TRUE("XPhysicalAlloc()", (dwSize != 0));
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RIP_ON_NOT_TRUE("XPhysicalAlloc()", ((ulAlignment & (ulAlignment - 1)) == 0));
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RIP_ON_NOT_TRUE("XPhysicalAlloc()",
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((flProtect & ~(PAGE_READWRITE | PAGE_READONLY | PAGE_WRITECOMBINE | PAGE_NOCACHE)) == 0));
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if (ulPhysicalAddress != MAXULONG_PTR) {
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RIP_ON_NOT_TRUE("XPhysicalAlloc()", (BYTE_OFFSET(ulPhysicalAddress) == 0));
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ulLowestAcceptableAddress = ulPhysicalAddress;
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ulHighestAcceptableAddress = ulPhysicalAddress + dwSize - 1;
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//
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// Ignore the alignment parameter; the caller gave us a physical address
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// and we assume it has the appropriate alignment already applied.
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//
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ulAlignment = 0;
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} else {
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ulLowestAcceptableAddress = 0;
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ulHighestAcceptableAddress = MAXULONG_PTR;
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}
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lpAddress = MmAllocateContiguousMemoryEx(dwSize, ulLowestAcceptableAddress,
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ulHighestAcceptableAddress, ulAlignment, flProtect);
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if (lpAddress == NULL) {
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SetLastError(ERROR_NOT_ENOUGH_MEMORY);
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}
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return lpAddress;
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}
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SIZE_T
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WINAPI
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XPhysicalSize(
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IN LPVOID lpAddress
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)
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{
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RIP_ON_NOT_TRUE("XPhysicalSize()", ((ULONG_PTR)lpAddress >= 0x80000000));
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return MmQueryAllocationSize(lpAddress);
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}
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VOID
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WINAPI
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XPhysicalProtect(
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IN LPVOID lpAddress,
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IN SIZE_T dwSize,
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IN DWORD flNewProtect
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)
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{
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RIP_ON_NOT_TRUE("XPhysicalProtect()", ((ULONG_PTR)lpAddress >= 0x80000000));
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RIP_ON_NOT_TRUE("XPhysicalProtect()",
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((flNewProtect & ~(PAGE_READWRITE | PAGE_READONLY | PAGE_WRITECOMBINE | PAGE_NOCACHE)) == 0));
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if (dwSize != 0) {
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MmSetAddressProtect(lpAddress, dwSize, flNewProtect);
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}
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}
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VOID
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WINAPI
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XPhysicalFree(
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IN LPVOID lpAddress
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)
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{
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RIP_ON_NOT_TRUE("XPhysicalFree()", ((ULONG_PTR)lpAddress >= 0x80000000));
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MmFreeContiguousMemory(lpAddress);
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}
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DWORD
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WINAPI
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XQueryMemoryProtect(
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IN LPVOID lpAddress
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)
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{
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return MmQueryAddressProtect(lpAddress);
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}
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