what is FLYCNFG on XScale?

[Holger S. <h.s...@mn...>]

Hi everybody !

Does anybody know what FLYCNFG is?

In the "Intel PXA250 and PXA210 Application Processor Operating System 
Developer's Guide" from February 2002 it says in Chapter 10, Point 2.

   a. Write MSC0, MSC1, MSC2

   b. Write MECR, MCMEM0...

   c. Write FLYCNFG

But the "Intel PXA250 and PXA210 Application Processor  Developer's Manual" 
from February 2000 does not contain the string FLYCNFG.

The only reference that I found was in eCos (Redboot), in 
hal/arm/xscale/lubbock/current/include/hal_platform_setup.h

   #define FLYCNFG_OFFSET  0x20

and boards/cradle/memsetup.S

   @ Step 2c
   @ fly-by-dma is defeatured on this part
   @ write flycnfg
   @ldr     r2,  =CFG_FLYCNFG_VAL
   @str     r2,  [r1, #FLYCNFG_OFFSET]

...
  .set FLYCNFG_VAL ,    0x01FE01FE              @ Fly-by-DMA config. reg - NOT 
USED