//------------------------------------------------------------------------------
//
// OEMSetMemoryAttributes
//
// OEM function to change memory attributes that isn't supported by kernel.
// Current implementaion only supports PAGE_WRITECOMBINE.
//
//------------------------------------------------------------------------------
BOOL OEMSetMemoryAttributes (
LPVOID pVirtAddr, // Virtual address of region
LPVOID pPhysAddrShifted,// PhysicalAddress >> 8 (to support up to 40 bit address)
DWORD cbSize, // Size of the region
DWORD dwAttributes // attributes to be set
)
{
if (PAGE_WRITECOMBINE != dwAttributes) {
DEBUGMSG (OAL_ERROR, (L"OEMSetMemoryAttributes: Only PAGE_WRITECOMBINE is supported\r\n"));
return FALSE;
}
return NKVirtualSetAttributes (pVirtAddr, cbSize,
0x4, // on ARMv6, this value means Shared-Device. On ARMv4, Non-cacheable & bufferable
0xC, // Mask of all cache related bits
&dwAttributes);
}
//------------------------------------------------------------------------------
//
// OEMSetMemoryAttributes
//
// OEM function to change memory attributes that isn't supported by kernel.
// Current implementaion only supports PAGE_WRITECOMBINE.
//
// This function first try to use PAT, and then try MTRR if PAT isn't available.
//
//------------------------------------------------------------------------------
BOOL OEMSetMemoryAttributes (
LPVOID pVirtAddr, // Virtual address of region
LPVOID pPhysAddrShifted,// PhysicalAddress >> 8 (to support up to 40 bit address)
DWORD cbSize, // Size of the region
DWORD dwAttributes // attributes to be set
)
{
if (PAGE_WRITECOMBINE != dwAttributes) {
DEBUGMSG (1, (L"OEMSetMemoryAttributes: Only PAGE_WRITECOMBINE is supported\r\n"));
return FALSE;
}
return NKVirtualSetAttributes (pVirtAddr, cbSize,
0x4, // not cacheable, but bufferable
0xC, // Mask of all cache related bits
&dwAttributes);
}
