34 lines
859 B
HTML
34 lines
859 B
HTML
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<title>Homework: x86 MMU</title>
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<html>
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<head>
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</head>
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<body>
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<h1>Homework: x86 MMU</h1>
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<p>Read chapters 5 and 6 of
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<a href="../readings/i386/toc.htm">Intel 80386 Reference Manual</a>.
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These chapters explain
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the x86 Memory Management Unit (MMU),
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which we will cover in lecture today and which you need
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to understand in order to do lab 2.
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<p>
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<b>Read</b>: bootasm.S and setupsegs() in proc.c
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<p>
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<b>Hand-In Procedure</b>
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<p>
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You are to turn in this homework during lecture. Please
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write up your answers to the exercises below and hand them in to a
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6.828 staff member by the beginning of lecture.
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<p>
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<p><b>Assignment</b>: Try to understand setupsegs() in proc.c.
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What values are written into <code>gdt[SEG_UCODE]</code>
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and <code>gdt[SEG_UDATA]</code> for init, the first user-space
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process?
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(You can use Bochs to answer this question.)
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</body>
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