ESL- SystemC IDE

Note

• source ../CoWare.csh -pa
• scide
• 
  

MIPS-Lite CPU Design using SystemC

SystemCall addition

Kernel Space:

• 在 kernel/sys.c 新增函式，並EXPORT
• include/asm-xxx/unistd.h 新增中斷號碼。
  NR_syscalls 記得+1.
• arch/i386/kernel/entry.S ( < 2.6.12 ) or syscall_table.S(>2.6.12)
  +.long sys_xxx
• 
  

User Space:

• include/asm/unistd_32.h 新增與Kernel相同的號碼的define.
• include/bits/syscall.h
  #define SYS_xxx __NR_xxx

main:

• static inline _syscall2(long, NEW, int, arg1, int, arg2);
  /*linux中一共定義了7種不同的_syscall*，在 unistd.h 裡面
  可以看到，若定義 system call 有要傳參數的話必需使用別
  的 _syscall
  */

• _syscall1(int,addtotal,int,　num) 

• test
  

  • #include 
     _syscall2(long, hello, int, arg1, int, arg2);
     int main(){
         printf(" %d \n", hello(1, 2) );
         return 0;
     }

• 新版kernel已改為 syscall ，不再使用舊的那七種方式
  
  • #include
    #include
    #include
    
    //static inline _syscall2(long, NEW, int, arg1, int, arg2);
    
    int main(){
    time_t tt;
    // time(&tt );
    syscall( 13, &tt );
    printf("tt=%d\n", tt );
    
    }

REF:

• http://www.csie.ncu.edu.tw/~hsufh/COURSES/FALL2007/syscall.html
  

MIPS Instruction set format

R-Type Instructions (Opcode 000000)

opcode (6)

rs (5)

rt (5)

rd (5)

sa (5)

function (6)

I-Type Instructions (All opcodes except 000000, 00001x, and 0100xx)

opcode (6)

rs (5)

rt (5)

immediate (16)

J-Type Instructions (Opcode 00001x)

opcode (6)

target (26)

Coprocessor Instructions (Opcode 0100xx)

opcode (6)

format (5)

ft (5)

fs (5)

fd (5)

function (6)

Reference:

• Page URL: http://www.d.umn.edu/~gshute/spimsal/talref.html
• http://www.mrc.uidaho.edu/mrc/people/jff/digital/MIPSir.html
• http://www.mrc.uidaho.edu/mrc/people/jff/digital/MIPS_slides/