some question about phase2.c

[xiangfu]

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Andy Green wrote:
> Somebody in the thread at some point said:
> |
> |
> | Andy Green wrote:
> |> Somebody in the thread at some point said:
> |> | Hi Andy:
> |> |
> |> |      void (*phase2)(void) = (void
> |> (*)(void))((int)bootloader_second_phase +
> |> | TEXT_BASE);
> |> | where here add TEXT_BASE? i don't understand.
> |> | i see the new patch there is no "+ TEXT_BASE"
> |
> |> TEXT_BASE is where we copy the qi image to in SDRAM, 0x33000000.  Before
> |
> | i can not find where the code that we move the QI from steppingstone 4K
> | to SDRAM.
> 
> We don't, we read it all again from the NAND, same as the CPU read it
> from NAND to get the 4KBytes into the steppingstone for us to start.
> 
>     /*
>      * We got the first 4KBytes of the bootloader pulled into the
>      * steppingstone SRAM for free.  Now we pull the whole bootloader
>      * image into SDRAM.
> 
>     ...
> 
>     /* We randomly pull 24KBytes of bootloader */
>     if (nand_read_ll((unsigned char *)TEXT_BASE, 0, 24 * 1024) < 0)
>         goto unhappy;
> 

i should read the code you write more carefully, thanks Andy.
ignore my last reply.

> currently we pull fixed 24KByte area from start of NAND into TEXT_BASE
> in start_qi.c.
> 
> -Andy
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