Chris Williams diodesign

## RISCV-SV39-Page-walker
/* I wrote a RISC-V SV39 page walker algorithm with PMP checker
 * in Rust to turn supervisor virtual addresses into machine physical
 * addresses when trapping illegal insgtructions and emulating them.
 * The fault address is an S-mode address that needs translating
 * to fetch and decode the illegal instruction, hence this page walk
 *
 * But turns out, I don't need that as I can use MPRV in mstatus to
 * perform a fetch as the previous mode (S-Mode in this case).
 * Rather than throw away the code, I've saved it here.
 *

## keybase.md

      
        
          
            
              
              1 file
            
          
          
            
              
              0 forks
            
          
          
            
              
              0 comments
            
          
          
            
              
              0 stars
            
          
        
        
          
              
          
          
            
                diodesign
                / keybase.md
            
            
              Last active
              February 6, 2017 07:04
            
          
        
      
        
  
      
    Keybase proof

I hereby claim:

I am diodesign on github.
I am diodesign (https://keybase.io/diodesign) on keybase.
I have a public key whose fingerprint is DFE4 461C E661 F66A 5235  8FA6 A698 6F5C AED8 CEDF

To claim this, I am signing this object:
	/* I wrote a RISC-V SV39 page walker algorithm with PMP checker
	* in Rust to turn supervisor virtual addresses into machine physical
	* addresses when trapping illegal insgtructions and emulating them.
	* The fault address is an S-mode address that needs translating
	* to fetch and decode the illegal instruction, hence this page walk
	*
	* But turns out, I don't need that as I can use MPRV in mstatus to
	* perform a fetch as the previous mode (S-Mode in this case).
	* Rather than throw away the code, I've saved it here.
	*