[U-Boot-Users] mpc8260 reset procedure

Mészáros Lajos ludwigm at siemens.com
Tue Jun 15 07:46:54 CEST 2004


The 8260 (and it's family) can set the IMMR 
at reset to:
 -0x00000000
 -0x00F00000
 -0x0F000000
 -0x0FF00000
 -0xF0000000
 -0xF0F00000
 -0xFF000000
 -0xFFF00000
depending on ISB bits of the 
_H_ard _R_eset _C_onfiguration _W_ord (HRCW)
(13-15 for the imbecile Motorola bit numbering 
or 18-16 for normals)
The 0x04700000 address is another stupidity
for 8260ADS board and demos of Mot. Comp.
As the "Boot memory space" (another bit from
HRCW) may be 
0xFE000000 - 0xFFFFFFFF or
0x00000000 - 0x01FFFFFF (first or last 8M of
the memory range) the ONLY acceptable
IMMR of any properly working Linux is
    <<<<< 0xF0000000 >>>>>              !!!
I dare to suggest it for standard on ALL 82xx
boards
    Ludwig

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