[U-Boot] code looping in_ram in start.S

[Marek Vasut]

On Tuesday, July 12, 2011 07:42:56 AM smitha.vanga at wipro.com wrote:
> Hi ,
> 
> 
> 
> I am trying to bring up u-boot1.1.3 on a custom mpc8247 board, having
> 32MB flash and two 32 M SDRAM .

Can you please try a newer version (git clone git://git.denx.de/u-boot.git)
> 
> See a problem after the relocation happens. The code gets relocated from
> Flash to RAM correctly. But when the control goes to in_ram it gets
> looped there
> 
> And then gets reset. I have done all the SDRAM tests all are successful.
> So how to proceed for this issue
> 
> 
> 
> Below is the SDRAM initialization sequence.
> 
> 
> 
> 
> 
> ; init SDRAM Init (PPC bus)
> 
> WM16  0xF0010184  0x1000            ;MPTPR
> 
> WM8   0xF001019C  0x18              ;PSRT
> 
> 
> 
> WM32  0xF001010c  0xFC002d00 ;OR1
> 
> WM32  0xF0010108  0x00001841 ;BR1
> 
> 
> 
> WM32  0xF0010190  0xeb29a4a3   ;PSDMR: Precharge all banks
> 
> WM8   0x00000000  0x00          ;Access SDRAM
> 
> WM32  0xF0010190  0xcB29a4a3    ;PSDMR: CBR Refresh
> 
> WM8   0x00000000  0xFF          ;Access SDRAM
> 
> WM8   0x00000000  0xFF          ;Access SDRAM
> 
> WM8   0x00000000  0xFF          ;Access SDRAM
> 
> WM8   0x00000000  0xFF          ;Access SDRAM
> 
> WM8   0x00000000  0xFF          ;Access SDRAM
> 
> WM8   0x00000000  0xFF          ;Access SDRAM
> 
> WM8   0x00000000  0xFF          ;Access SDRAM
> 
> WM8   0x00000000  0xFF          ;Access SDRAM
> 
> WM32  0xF0010190  0xdb29a4a3    ;PSDMR: Mode Set
> 
> WM8   0x00000000  0x00          ;Access SDRAM
> 
> WM32  0xF0010190  0xc329a4a3    ;PSDMR: enable refresh, normal operation
> 
> 
> 
> Regards,
> 
> Smitha
> 
> 
> 
> 
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