Re: reset_vector in ipl.S

[Collins Chen]

Dear Ron,
     Thank you very much. Now I have another question need your help.
     I know the SPL code is placed in 0x80000, and the size is 63K bytes. This
is our linuxbios code, is it right? But I don't know which file is executed
first of all when cpu go to 0x80000. Can you tell me which file is placed on the
0x80000 and it will be executed at first? Thanks!

Regards,
Collins







Ronald G Minnich <[EMAIL PROTECTED]> on 2001-12-15 07:53:49
                                                                                
                                                                                
                                                                                


                                                              
                                                              
                                                              
 To:      Collins Chen/ALI_ZSZ/ACER@ACER                      
                                                              
 cc:      Jeffrey W.C. Chen/ALI_TPE/ACER@ACER, Ho Fong        
          Hsu/ALI_ZSZ/ACER@ACER, LinuxBIOS                    
          <[EMAIL PROTECTED]>                                
                                                              
                                                              
                                                              
 Subject: Re: reset_vector in ipl.S                           
                                                              








On Friday 14 December 2001 00:59, Collins Chen wrote:
> Dear Ron,
>      I just have a question about cpu reset_vector in ipl.S.
>      In ipl.S the reset_vector is defined as 0xfe1f0 or 0x1f0, but as we
> all known, cpu go to 0xfffe0 to fetch the first instruction when power-on.
> Don't it conflict? How disk-on-chip solve this problem?


For the ipl.S, the address space is 512 bytes, starting at 0. This 512 bytes
lives at then end of the 1M space, by the addressing, so you have to add the
0x1f0 to 0xff100, which gets 0xffff0

ron