嵌入式软件开发导论

1、嵌入式软件开发导论NK.EXE OALRAM ROM/FLASHTimerINTCCPUCreateFile()PriorityComponent0-19Open Real Time Above Drivers20Graphics Vertical Retrace99Power management Resume Thread100-108USB OHCI UHCI, Serial109-129IRSIR1, NDIS, Touch130KITL131VMini132CxPort145PS2 Keyboard148IRComm150TAPI248Power Management249WaveD

2、ev, Mouse, PnP, Power250WaveAPI251Normal252-255Open - ApplicationsThread 3High PriorityMedium PriorityLow PriorityThread 3Resource Owner:Thread 2Thread 1Thread 1PriorityInversionPreemptPreemptBlockedPriorityRestoredThread 3Example: Thread 1 blocked waiting for resource owned by Thread 3, causing Pri

3、ority InversionThread 3BlockedThread 1Thread 2Blocked* 只在桌面Windows上存在Physical Memory* Storage DeviceVirtual MemoryLogical Memory (Heap, stack)C Runtime (mallc, new)ApplicationMemory Mapping(Shared)ReservedSlot 32:Process32.Slot 1:XIP DLL CodeSlot 0:Active Process2GB2GB32MBKernel SpaceUserSpaceKernel

4、 Addresses: KPAGE, Trap Area, OthersUnusedStatically Mapped Virtual Addresses: Un-CachedStatically Mapped Virtual Addresses: CachedSlot 0 Current ProcessSlot 1 XIP DLL codeSlots 2-32 - ProcessesSlots 33-63Object Store and Memory-Mapped FilesFFFF FFFFE000 0000C400 0000C200 0000C000 0000A000 00008000

5、00007FFF FFFF4200 00000400 00000200 00000000 0000Total 4 GB VirtualSpace2 GB2 GBKernel SpaceUser SpaceUnused2 GBUser512 MBUncached512 MBCached32 MB FlashPhysical MemoryVirtual Memory8000 0000A000 0000C000 000064 MB RAM0000 000064 MB RAM32 MB Flash64 MB RAMFFFF FFFFAddressTranslation32 MB FlashKernel SpaceUserSpaceSlot 30Slot 31Slot 32. . .01FF FFFF0001 00000000 000032 MB Process SpaceCurrent ProcessXIP ROM DLLsnk.exeshell.exedevice.exegwes.exeC400 0000C200 0000Free Virtual SpaceSlot 63. . .Resource DLLsSlot 2Slot 3Slot 4Slot 5Slot 1Slot 00A00 00003E00 00003C00 00004000 0000