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SubjectRe: Linux/ix86 booting process and BIOS
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> - To which extent is the initialization stuff performed by the BIOS repeated
> by Linux kernel?

Only in part

> - Which tasks really have to be performed by the BIOS? What does Linux rely
> on?

o CPU initialisation sequences - eg the very undocumented L2 cache
programming on earlier PII chips and the MTRR setups for early
steppings to disable (we think) some CPU optimisations

o Chipset initialisation sequences

o PCI bus configuration including boot rom execution

o Memory sizing

Alan


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