[U-Boot] [T-Engine] UBoot configuration for T-Engine/SH7727 MS7727CP02 DevKit

[Nobuhiro Iwamatsu]

Hi,

2008/8/20 thaoth <thaoth at cybersoft-vn.com>:
>
> Hi Nobuhiro Iwamatsu,
>
> 1. Clock frequency of board.
>
> #define CONFIG_SYS_CLK_FREQ     33333333
> #define TMU_CLK_DIVIDER         4       /* 4 (default), 16, 64, 256 or 1024 */
> #define CFG_HZ                  (CONFIG_SYS_CLK_FREQ / TMU_CLK_DIVIDER)
>
> I don't understand how to set CONFIG_SYS_CLK_FREQ value. From T-Engine
> support, they said clock frequency of board is 144MHz.


Please set outside clock to CONFIG_SYS_CLK_FREQ.

>
> 2. Cross compiler tool chain : GCC vs T-Engine toolchain
> There are two tool chains
> -
> http://www.superh-linux.org/archive/bsp/sh7721_se/toolchain_sh3_gcc4.2.tar.gz
> support elf32-sh-linux target.
> - Tool chain from T-Engine forum support elf32-sh-tkernel
> Using both cross compilers, we could turn on LED on debug board by setting
> correct value LED_A and LED_B value.
>
> 3. ICE or JTAG debugger and LED debugging.
> I don't have these debug tools, and so hard for debugging. T-Engine/SH7727
> DevKit has debug board with 8 LEDs. I could turn on/off these LEDs by
> setting correct value to 0xA1600000 memory. But  C function turn on/off LED
> cannot work. For example
>
> int cpu_init(void)
> {
>        // Turn off LED 1 to notify cpu_init is called.
>        outw(0x00 & 0xFF, 0xa1600000);
>        return 0;
> }
>
> I don't know why it isn't called?

I think that cpu_init is not carried out.
I think that u-boot stopped on lowlevel_init function.

>
> Would you please give me your ideas? Thank you a lot.

I will get T-Engine board ......
Please wait.

Best regards,
 Nobuhiro