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Atari coding BBS
| Re: 68030 cache disable |
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Posted by: mikro
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Jul,25.2011-10:16
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This is what I use:
_asm_save_030_cache_settings:
movec cacr,d0
move.l d0,save_cacr
rts
_asm_deactivate_030_datacache:
movec cacr,d0
bset #0,d0 ; i cache on
bset #4,d0 ; i burst on
bclr #8,d0 ; d cache off
bclr #12,d0 ; d burst off
movec d0,cacr
rts
_asm_restore_030_cache_settings:
move.l save_cacr,d0
bset #11,d0 ; clear data cache
bset #3,d0 ; clear inst cache
movec d0,cacr
rts
But as you probably know, this is 030 specific thing, 040+ uses completely different registers/bits.
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