mfspr r0,638. Why 638 ?

[Kumar Gala]

This is 8xx (PQ1) SPR.  If you look one of those user manuals you  
will see it.

- kumar

On Dec 3, 2005, at 4:38 AM, <zengshuai at sogou.com>  
<zengshuai at sogou.com> wrote:

> We know "mfspr r0,638" can get the IMMR.
> But why?
> I checked "MPC82xx Reference Manual","G2 PowerPC&#8482; Core  
> Reference Manual","Programming Environments Manual",
> but I didn't find any word about that.How did the person who first  
> known know?
>
> "G2 PowerPC&#8482; Core Reference Manual"  where is the "SPR 638"?
> Table 3-33. Implementation-Specific SPR Encodings (mfspr)
> Decimal spr[5?9] spr[0?4] RegisterName Access
> 58 00001 11010 CSRR0  Supervisor
> 59 00001 11011 CSRR1  Supervisor
> 276 01000 10100 SPRG4  Supervisor
> 277 01000 10101 SPRG5  Supervisor
> 278 01000 10110 SPRG6  Supervisor
> 279 01000 10111 SPRG7  Supervisor
> 286 01000 11110 SVR  Supervisor
> 309 01001 10101 IBCR  Supervisor
> 310 01001 10110 DBCR  Supervisor
> 311 01001 10111 MBAR  Supervisor
> 317 01001 11101 DABR2  Supervisor
> 560 10001 10000 IBAT4U  Supervisor
> 561 10001 10001 IBAT4L  Supervisor
> 562 10001 10010 IBAT5U  Supervisor
> 563 10001 10011 IBAT5L  Supervisor
> 564 10001 10100 IBAT6U  Supervisor
> 565 10001 10101 IBAT6L  Supervisor
> 566 10001 10110 IBAT7U  Supervisor
> 567 10001 10111 IBAT7L  Supervisor
> 568 10001 11000 DBAT4U  Supervisor
> 569 10001 11001 DBAT4L  Supervisor
> 570 10001 11010 DBAT5U  Supervisor
> 571 10001 11011 DBAT5L  Supervisor
> 572 10001 11100 DBAT6U  Supervisor
> 573 10001 11101 DBAT6L Supervisor
> 574 10001 11110 DBAT7U  Supervisor
> 575 10001 11111 DBAT7L  Supervisor
> 976 11110 10000 DMISS Supervisor
> 977 11110 10001 DCMP Supervisor
> 978 11110 10010 HASH1 Supervisor
> 979 11110 10011 HASH2 Supervisor
> 980 11110 10100 IMISS Supervisor
> 981 11110 10101 ICMP Supervisor
> 982 11110 10110 RPA Supervisor
> 1008 11111 10000 HID0 Supervisor
> 1009 11111 10001 HID1 Supervisor
> 1010 11111 10010 IABR Supervisor
> 1011 11111 10011 HID2 Supervisor
> 1013 11111 10101 DABR  Supervisor
> 1018 11111 11010 IABR2  Supervisor
>
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