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