[U-Boot] Porting u-boot for MPC8280 based board.
Hi,
I am trying to port u-boot for MPC8280 by taking reference MPC8260ADS, but its not booting,
u-boot Version u-boot-1.3.1 ARCH = PPC 82xx Processor = MPC8280 Bootflash = AM29LV040B (512kb) mirror bit sdram = 512MB
I modified MPC8260ADS with CPU clock frequency 100MHz, Text base 0xfff00000, Flash Base 0xfff00000 and sdram base 0x00000000, and console on SMC of port pins PA9(RX) and PA8 (Tx), But nothing am getting on serial port while booting. Please can any one suggest me to come out of this.
Thanks for your suggestion in Advance
Regarding Thirumalesha N Namagondlu
Dear Thirumalesha N,
In message CAO1Rv-adDQc_0_p0yqPTMNWOvUsfvunTHtnMtqhSct2psH3+pQ@mail.gmail.com you wrote:
I modified MPC8260ADS with CPU clock frequency 100MHz, Text base
Is this the actual clock frequency on your system? Really?
0xfff00000, Flash Base 0xfff00000 and sdram base 0x00000000, and console on
Are these values correct for your hardware?
SMC of port pins PA9(RX) and PA8 (Tx), But nothing am getting on serial port while booting. Please can any one suggest me to come out of this.
Check the BRGs and the clock routing; if you don't have the right clocksand all tehse little details there will be no output.
Best is to attach your JTAG debugger and start GDB.
Best regards,
Wolfgang Denk
I modified MPC8260ADS with CPU clock frequency 100MHz, Text base
Is this the actual clock frequency on your system? Really?
0xfff00000, Flash Base 0xfff00000 and sdram base 0x00000000, and
console on
Are these values correct for your hardware?
SMC of port pins PA9(RX) and PA8 (Tx), But nothing am getting on serial port while booting. Please can any one suggest me to come out of this.
Check the BRGs and the clock routing; if you don't have the right clocksand all tehse little details there will be no output.
Best is to attach your JTAG debugger and start GDB.
Hi,
Yes These frequency and flash base address are correct to my board. SMC2 pins PA9-TX and PA8-Rx, I Checked BRG and clock routing is matching to board.
I have BDI 2000 tool, but its not connecting to board.
Regards Thirumalesha N
Dear Thirumalesha N,
In message CAO1Rv-ZscUmEj-sBjaneUYf4ipc7BZDqeRis-87Lp9zk3nuk7g@mail.gmail.com you wrote:
Yes These frequency and flash base address are correct to my board.SMC2 pins PA9-TX and PA8-Rx, I Checked BRG and clock routing is matching to board.
Then you need a debugger.
I have BDI 2000 tool, but its not connecting to board.
This is a problem that should be fixable. Keep in mind that the MPC82xx can come up in different modes, depending on if there is a valid HRCW in flash or not. This can change the start address, too. Try both high and low boot configurations.
Best regards,
Wolfgang Denk
Yes These frequency and flash base address are correct to my board.SMC2 pins PA9-TX and PA8-Rx, I Checked BRG and clock routing is matching to board.
Then you need a debugger.
I have BDI 2000 tool, but its not connecting to board.
This is a problem that should be fixable. Keep in mind that the MPC82xx can come up in different modes, depending on if there is a valid HRCW in flash or not. This can change the start address, too. Try both high and low boot configurations.
For reset circuitry HRCW is there. In hardware also its considered. if i Want to try for high boot have to change TEXT_BASE address?
Best regards,
Thirumalesha N
Dear Thirumalesha N,
In message CAO1Rv-a_hPKfmm2ix_Gc0BgokiQk=qMOnUK4NOmuVxkQWXsn=g@mail.gmail.com you wrote:
I have BDI 2000 tool, but its not connecting to board.
This is a problem that should be fixable. Keep in mind that the MPC82xx can come up in different modes, depending on if there is a valid HRCW in flash or not. This can change the start address, too. Try both high and low boot configurations.
For reset circuitry HRCW is there. In hardware also its considered.if i Want to try for high boot have to change TEXT_BASE address?
In the first place, you must get the BDI working. To do so, you have to tweak the BDI config file.
Best regards,
Wolfgang Denk
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Thirumalesha N -
Wolfgang Denk