Книга: Microsoft Windows Embedded CE 6.0 Exam Preparation Kit
Kernel Address Space
Kernel Address Space
Windows Embedded CE 6.0 divides the kernel address space further into several regions for specific purposes, as illustrated in Figure 5-6. The lower two regions of 512 MB each statically map physical memory into cached and non-cached virtual memory. The middle two regions for kernel execute in place (XIP) DLLs and Object Store are important for the OS design. The remaining space is for kernel modules and CPU-specific purposes.
Figure 5-6 Kernel space in Windows Embedded CE 6.0
Table 5-9 summarizes the kernel virtual memory regions with start and end addresses.
Table 5-9 Kernel memory regions
| Start Address | End Address | Description |
|---|---|---|
| 0xF0000000 | 0xFFFFFFFF | Used for CPU specific system trap and kernel data pages. |
| 0xE0000000 | 0xEFFFFFFF | Kernel virtual machine, it is CPU dependent, for example this space is not available for SHx. |
| 0xD0000000 | 0xDFFFFFFF | Used for all kernel mode modules of the OS. |
| 0xC8000000 | 0xCFFFFFFF | Object Store used for RAM file system, database and registry. |
| 0xC0000000 | 0xC7FFFFFF | XIP DLLs. |
| 0xA0000000 | 0xBFFFFFFF | Non-cached mapping of physical memory. |
| 0x80000000 | 0x9FFFFFFF | Cached mapping of physical memory. |
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