On Thu, Jul 4, 2013 at 6:22 PM, [email protected] <[email protected]> wrote:
> On Thu, Jul 4, 2013 at 5:32 PM, Andreas Fritiofson
> <[email protected]> wrote:
>>
>> On Thu, Jul 4, 2013 at 9:32 PM, [email protected] <[email protected]>
>> wrote:
>>>
>>> I'm using an Olimex ARM-USB-OCD. Target is a MIPS based router chip?
>>> openocd seems to be working, it is just painfully slow. It took 15
>>> minutes to download uboot.
>>>
>>> > load_image /home/apps/u-boot/uboot.bin 0x80200000 bin
>>> 99772 bytes written at address 0x80200000
>>> downloaded 99772 bytes in 900.955444s (0.108 KiB/s)
>>>
>>>
>>>
>>> source [find interface/arm-usb-ocd.cfg]
>>
>>
>> For one thing, you should be using the ftdi adapter driver instead of the
>> ft2232. If you configured OpenOCD with --enable-ftdi, it's a simple matter
>> of sourcing interface/ftdi/olimex-arm-usb-ocd.cfg instead.
>
> I switched that.
>
>>
>> But for this level of (non-)performance, there's a bigger problem than the
>> adapter driver. Post a -d3 debug log and we'll try to see where all the time
>> is spent.
>
>
>
>>
>> What is at 0x80200000? At 0x80040000? Is it slow if you load something to
>> the latter (make sure not to overlap with the working area)? How about
>> dump_image reads?
I moved the workarea to 0x80080000 . That's 500K which should be
plenty far away from uboot.
SDRAM is working. I can write a value and get it back.
>>
>> Also make sure you're using a recent enough openocd, including any relevant
>> pending MIPS patches in gerrit (I have no idea what's relevant, though).
>
> I am built from source. I had to add this patch to get it working at all.
> Those 18 dummy regs don't seem to be needed anymore.
>
> diff --git a/src/target/mips32.c b/src/target/mips32.c
> index d649901..8705ebc 100644
> --- a/src/target/mips32.c
> +++ b/src/target/mips32.c
> @@ -92,7 +92,7 @@ static struct mips32_core_reg
> mips32_core_reg_list_arch_info[MIPS32NUMCOREREGS]
> /* number of mips dummy fp regs fp0 - fp31 + fsr and fir
> * we also add 18 unknown registers to handle gdb requests */
>
> -#define MIPS32NUMFPREGS (34 + 18)
> +#define MIPS32NUMFPREGS (34)
>
> static uint8_t mips32_gdb_dummy_fp_value[] = {0, 0, 0, 0};
>
>
>
>>
>> I have no experience with MIPS but if I understand correctly, there are
>> different methods to access memory. Is the fastest one available in use?
>
> I am new too MIPS too.
>
> Reads are slow...
> mdw 0x80000198 200
> Take 20 seconds.
>
> mww 0x80000198 200 0
> is instant
>
> register dump is instant
>
> This has a lot about using OpenOCD on MIPs that I don't really understand.
>
> http://openocd.sourceforge.net/doc/doxygen/html/targetmips.html
>
>
>
>
>
>>
>> /Andreas
>>
>
>
>
> --
> Jon Smirl
> [email protected]
--
Jon Smirl
[email protected]
------------------------------------------------------------------------------
This SF.net email is sponsored by Windows:
Build for Windows Store.
http://p.sf.net/sfu/windows-dev2dev
_______________________________________________
OpenOCD-devel mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/openocd-devel
