What problem are you specifically having?
Note that the CPU L1 and L2 are enabled as a unit (unless you specifically disable the CPU L2 using third-party utilities - diagnostic mode). The BIOS only has control over the "total CPU cache" and the motherboard cache (in this case it would be called an L3 cache).
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KachiWachi
Moderator - Wim's BIOS
CPU #1 -
DFI 586IPVG, K6-2/+ 450 (Cyrix MII 433), 128MB EDO. BIOS patched by
Jan Steunebrink.
CPU #2 - Amptron PM-7900 (M520), i200 non-MMX, 128MB EDO
CPU #3 - HP8766C, PIII-667, 768MB SDRAM
CPU #4 - ASUS P3V4X, PIII-733, 256MB SDRAM
CPU #5 - ??? ;)