[U-Boot] [Add tlbentry problem]

[U-Boot] [Add tlbentry problem]

[김영순]

 

I?ve worked on my custum board based on SEQUOIA.

 

I?d like to add new device (DSP, SIZE=256M, CS4).

I added tlbentry(256M) in init.S and defined CS4 in sequoia.h.

 

Init.S:

           /* TLB-entry for EBC(DSP) */

          tlbentry( CFG_DSP_BASE, SZ_256M, CFG_DSP_BASE, 1,
AC_R|AC_W|AC_X|SA_G|SA_I ) 

 

sequoia.h:

#define CFG_DSP_BASE              0xd0000000

#define CFG_EBC_PB4AP             0x05014300

#define CFG_EBC_PB4CR             (CFG_DSP_BASE | 0x3a000)

 

The problem is this.

When I access over 2Mbytes area of DSP4(Over d0200000), I?ve got bus error
in my application.

Accessing to under 2Mbytes, it works well?.

 

Are there anything to do, when I want to attatch new devices????

 

Best Regards?

 

 

 

[U-Boot] [Add tlbentry problem]

[Stefan Roese]

On Monday 18 August 2008, ??? wrote:
> I?ve worked on my custum board based on SEQUOIA.
>
>
>
> I?d like to add new device (DSP, SIZE=256M, CS4).
>
> I added tlbentry(256M) in init.S and defined CS4 in sequoia.h.
>
>
>
> Init.S:
>
>            /* TLB-entry for EBC(DSP) */
>
>           tlbentry( CFG_DSP_BASE, SZ_256M, CFG_DSP_BASE, 1,
> AC_R|AC_W|AC_X|SA_G|SA_I )
>
>
>
> sequoia.h:
>
> #define CFG_DSP_BASE              0xd0000000
>
> #define CFG_EBC_PB4AP             0x05014300
>
> #define CFG_EBC_PB4CR             (CFG_DSP_BASE | 0x3a000)

With this you defined the bank size to 2MB. So a bus error for access "after" 
these 2MB is to be expected. Try this instead:

#define CFG_EBC_PB4CR             (CFG_DSP_BASE | 0xfa000)

This will only cover 128MB though as this is the max for an EBC bank size.

Best regards,
Stefan

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=====================================================================

[U-Boot] [Add tlbentry problem]

[Feng Kan]

Hi Yshim:
Please check your EBC CR value, if you configure for 2M, then
thats what you will get.

Feng Kan

??? wrote:
>  
>
> I?ve worked on my custum board based on SEQUOIA.
>
>  
>
> I?d like to add new device (DSP, SIZE=256M, CS4).
>
> I added tlbentry(256M) in init.S and defined CS4 in sequoia.h.
>
>  
>
> Init.S:
>
>            /* TLB-entry for EBC(DSP) */
>
>           tlbentry( CFG_DSP_BASE, SZ_256M, CFG_DSP_BASE, 1,
> AC_R|AC_W|AC_X|SA_G|SA_I ) 
>
>  
>
> sequoia.h:
>
> #define CFG_DSP_BASE              0xd0000000
>
> #define CFG_EBC_PB4AP             0x05014300
>
> #define CFG_EBC_PB4CR             (CFG_DSP_BASE | 0x3a000)
>
>  
>
> The problem is this.
>
> When I access over 2Mbytes area of DSP4(Over d0200000), I?ve got bus error
> in my application.
>
> Accessing to under 2Mbytes, it works well?.
>
>  
>
> Are there anything to do, when I want to attatch new devices????
>
>  
>
> Best Regards?
>
>  
>
>  
>
>  
>
>
>