Answer the following questions for the following virtual address: 00,0001,0000,0011. 1) (10 pts) Assume that sizeof(PDE)=4,...

 

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Answer the following questions for the following virtual address: 00,0001,0000,0011. 1) (10 pts) Assume that sizeof(PDE)=4, and sizeof(PTE)=4. Write down the values (in hexadecimal format) of the following variables in the control flow shown Figure 20.6. VPN_MASK, SHIFT, PD_MASK, PD_SHIFT, PDIndex, PT_MASK, PT_SHIFT, PTIndex, PDE.PFN, PTE.PFN 2) (3 pts) Write down the virtual address's physical address in hexadecimal format. Briefly explain how you derive your answer. Consider the two-level page table structure in Figure 20.5 Page Directory Page of PT (@PFN:100) PFN valid? PFN valid 100 1 0 0 101 0 0 0 DO O O O 0 0 10 23 80 59 1 1 0 0 1 0 0 0 prot r-x r-x 0 rw- rw- Page of PT (@PFN:101) PFN valid prot 0 1 1 1 Figure 20.5: A Page Directory, And Pieces Of Page Table 0 0 55 45 rw- rw- Answer the following questions for the following virtual address: 00,0001,0000,0011. 1) (10 pts) Assume that sizeof(PDE)=4, and sizeof(PTE)=4. Write down the values (in hexadecimal format) of the following variables in the control flow shown Figure 20.6. VPN_MASK, SHIFT, PD_MASK, PD_SHIFT, PDIndex, PT_MASK, PT_SHIFT, PTIndex, PDE.PFN, PTE.PFN 2) (3 pts) Write down the virtual address's physical address in hexadecimal format. Briefly explain how you derive your answer. Consider the two-level page table structure in Figure 20.5 Page Directory Page of PT (@PFN:100) PFN valid? PFN valid 100 1 0 0 101 0 0 0 DO O O O 0 0 10 23 80 59 1 1 0 0 1 0 0 0 prot r-x r-x 0 rw- rw- Page of PT (@PFN:101) PFN valid prot 0 1 1 1 Figure 20.5: A Page Directory, And Pieces Of Page Table 0 0 55 45 rw- rw-

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To answer the first question youll need to understand the structure of a twolevel page table Here ar... View the full answer