[U-Boot-Users] MIPS: question about start.S

[U-Boot-Users] MIPS: question about start.S

[wangjiankun820624]

 
 I want to know the function of the section following below in cpu\mips\start.S. Thank you!

        RVECENT(romReserved,3)
        RVECENT(romReserved,4)
        RVECENT(romReserved,5)
        RVECENT(romReserved,6)
        RVECENT(romReserved,7)
        RVECENT(romReserved,8)
        RVECENT(romReserved,9)
        RVECENT(romReserved,10)
        RVECENT(romReserved,11)
        RVECENT(romReserved,12)
        RVECENT(romReserved,13)
        RVECENT(romReserved,14)
        RVECENT(romReserved,15)
        RVECENT(romReserved,16)
        RVECENT(romReserved,17)
        RVECENT(romReserved,18)
        RVECENT(romReserved,19)
        RVECENT(romReserved,20)
        RVECENT(romReserved,21)
        RVECENT(romReserved,22)
        RVECENT(romReserved,23)
        RVECENT(romReserved,24)
        RVECENT(romReserved,25)
        RVECENT(romReserved,26)
        RVECENT(romReserved,27)
        RVECENT(romReserved,28)
        RVECENT(romReserved,29)
        RVECENT(romReserved,30)
        RVECENT(romReserved,31)
        RVECENT(romReserved,32)
        RVECENT(romReserved,33)
        RVECENT(romReserved,34)
        RVECENT(romReserved,35)
        RVECENT(romReserved,36)
        RVECENT(romReserved,37)

 
 
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[U-Boot-Users] MIPS: question about start.S

[Andrew Dyer]

2008/5/13  <wangjiankun820624@163.com>:
>  I am sorry for my three times of posting the same question! It is the first
> time for me to post question here, so I don't know some rules!
> Sorry!
>
> It is the define of RVECENT whiche has two arguments f and n, but only f is
> used in the code, n is not used.
> I want to know the function of the argument n, since it is not used in the
> code.
> Thank you very much!
> #define RVECENT(f,n) \
>    b f; nop

You answered your own question, it has no function.

Assuming each jump vector is x words long, it could be used to
generate an address to locate the code in the case where you didn't
want to explicitly fill each jump vector.


-- 
Hardware, n.:
 The parts of a computer system that can be kicked.