On Tuesday, July 12, 2011 07:42:56 AM smitha.vanga@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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