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Файл:Sauermann J.Realtime operating systems.Concepts and implementation of microkernels for embedded systems.1997.pdf
3. Kernel Implementation |
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3 Kernel Implementation
3.1Kernel Architecture
Figure 3.1 shows the overall architecture of the kernel implementation.
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Application |
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Application |
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Kernel |
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Queue |
Application |
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Serial I/O |
Task |
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Startup |
os |
Queue |
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Queue |
Semaphore |
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User Mode |
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Supervisor |
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Mode |
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Startup |
Hardware Access |
ISR |
Scheduler |
P(), V(), Poll() |
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crt0.S |
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Hardware (DUART)
FIGURE 3.1 Kernel Architecture
The bottom part of Figure 3.1 shows the part of the kernel that is (along with the functions called from there) executed in supervisor mode. All code that is