[U-Boot] DNS323 (Orion5x) must double ORION5X_SZ_BOOTROM to access full flash

[Albert ARIBAUD]

Le 24/08/2010 09:47, Rogan Dawes a écrit :

> Yes, I still have the vendor u-boot flashed, so I can still see its
> configuration. And, yes, it does allow reading the full 8MB of flash.

> Vendor u-boot:

> f1020040: 007f0f11 ff800000 00000000 00000000    ................

> Mainline (8MB window):

> f1020070: 003f0f11 ff800000 00000000 00000000    ..?.............

> Mainline (16MB window):

> f1020070: 007f0f11 ff800000 00000000 00000000    ................

The good news is that your flash works normally.

The bad news is that the mainline settings you are showing here are 
wrong with respect to the ORION5X_SZ_BOOTROM: A 16 MB window would be 
00ff0f11. 007f0f11 is 8MB, and 003f0f11 is 4 MB. Thus, what you think is 
a 16MB widow is actually a 8MB one, and the 8MB one is actually 4MB, 
which explains the issues you have.

I've just checked the code for computing the window size in mainline 
u-boot, and it is off by one, reducing the actual window mapping by half. :(

They weird thing is that it affect *all* windows, RAM included; we 
should have seen other issues! I'll do some checks later today and 
provide an officiel bugfix this evening.

Amicalement,
-- 
Albert.