Dear Wolfgang Denk:
Our hardware should be fine. We run VxWorks on it before and it works fine. The hardware running VxWorks is already a mature product of our company. We recently want to run linux on it because of the high price of VxWorks.
I do a little experiments on the U-Boot-2009-08, any I successfully make the "Unknown Flash on Bank 0" appear without any code modification on common files. I only add my board specification files and my config file, change the Makefile to support my board files to compile, then the "unknown flash on bank 0" appears.
I use ELDK for cross compile, and the ELDK gcc version is : ppc_6xx-gcc(GCC) 4.2.2
Which part of the code may cause this kind of problem? Maybe I can send your that part of my codes.
2009/10/27 Wolfgang Denk wd@denx.de
Dear Peter Pan,
please keel the mailinmg list on Cc:
In message 48abf2c20910261812g75d17990jd1793f0560bc882c@mail.gmail.com you wrote:
I also think the 1.2.0 is an ancient version, so I migrate my u-boot from 1.2.0 to u-boot-2009-08 yestoday, the same "Unknown Flash Bank" problem happened. I changed a little in the common files, all of which I think should not
lead
to this "Unknown Flash Bank" problem. I use MPC8247, and all my changes are:
Which exact board are you using?
- in /common/env_common.c, I add my environment variables to array
default_environment.
Bad, very bad. You should never meddle with this file. You should add your custom settings to your board config file only.
- in /cpu/mpc8260/cpu_init.c, in function cpu_init_f, I common this line
"immr->im_clkrst.car_rsr = RSR_ALLBITS;", because I will need RSR
register
value later 3. in /cpu/mpc8260/serial_smc.c, we use BRG1 for SMC1 instead of BRG7
You are not supposed to meddle with these files. No changes to such common files are necessary to port U-Boot to custom hardware.
- in /include/mpc8260.h, we add a hardware dog kick function, and
modified
functiion "reset_8260_watchdog" a little to kick the hardware dog. 5. in /common/main.c, we add support to the two jumper on our board,
which
is just two "if... else...".
Such changes should be done in board specific code, not in common files.
- in our board specific files, they all works fine before and I did not
change a thing. Make all the changes above, the u-boot works fine. then I modified the /common/cmd_mem.c, we make the mtest command to test memory only once(in CFG_ALT_MEMTEST mode). I change the "for(;;)" to for(;iterations == 1;)", then the "Unknown
Flash
Bank" happens. I printed out the 4 Flash IDs, the Manufacture Id changes from
0x01(normal)
to 0x808(wrong!!), other IDs are all normal.
This makes zero sense to me.
I understand you have a custom board with local modifications. That means we don't know neither your hardware nor your code, which makes it impossible to help. From the symptoms you describe, there must be something fundamentally broken with your port, but without seeing your code we cannot even guess what this might be.
Best regards,
Wolfgang Denk
-- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de The high cost of living hasn't affected its popularity.