Regarding 512x psc register maps:
The register map for 5125 does not just change the size of the registers. Some registers change locations. The issue is that the hardware guys decided to "fix" the old broken register access. The 5200, 5121, 5123 had some registers that were:
Function A when read but function B when written.
For this case the old register is replaced by two read/write registers. So the index of all subsequent registers is incremented.
Function A on first access after writing to another register and Function B on subsequent accesses.
This was also fixed by replacing the statefull register by two registers.
So the problem is painful but I believe doable. The problem I never resolved was dealing with this mess in linux where the same binary has to work with both platforms. I decided that the register accesses needed to be done via an offsets array that was populated at run time but I never got around to implementing that.
John
- MPC5121 PSC
- note: MPC5121e register overloading is handled by unions with
#defines to
- reference the reg seemlessly these #defines must not exist for
MPC5125 code
- since it does not have this overloading. Since the register naming
is the
- same as the MPC5125 Reference Manual and this naming is exactly
the
reg names
- used in the init code (which is nearly identical) it causes
compile
errors to
- leave in and must be #ifdef'ed out. It also helps to share code
to have the
*/
- same structure for both MPC5121 and MPC5125
I disagree. To me the code becomes pretty much unreadable. I think we need to find a better implementation for this.
Look Wolfgang ... It's very readable .. with a 5121 type
You definition of readable does not match mine. I nak this code.
Best regards,
Wolfgang Denk
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