PRB: Windows CE VirtualCopy() Failing for Physical Memory

• Microsoft Windows CE for the Handheld PC

SYMPTOMS

VirtualCopy() returns error 87, incorrect parameter, when mapping physical memory.

CAUSE

When mapping physical memory, the high bit of the source address is not set.

RESOLUTION

Set the high bit of the source address that is to be copied:

   LPVOID virtreg;

   // Allocate memory.
   irtreg = VirtualAlloc(  (LPVOID) 0,  (DWORD) 4096,
   (DWORD) MEM_RESERVE, (DWORD) PAGE_NOACCESS);

   // Map the memory from location 0xb8000.
   if (!VirtualCopy( virtreg,
           (LPVOID) 0x800b8000,
           (DWORD) 4096, (DWORD) PAGE_READWRITE|PAGE_NOCACHE))
   {
      DEBUGMSG(ZONE_WARNING,
      (TEXT("CFDISK:CFInit VirtualCopy failed %d\r\n"), GetLastError()));
   } 

STATUS

This behavior is by design, based on MIPS-style addressing.

Additional query words:

Keywords : kbDDK kbETK kbWinCE kbDSupport
Version : WINDOWS:
Platform : WINDOWS
Issue type : kbprb