Re: [PATCH 1/1] Fix boot on efi 32 bit Machines [try #4]

H. Peter Anvin
2006-07-14T06:22:40Z

Eric W. Biederman wrote:
>
> While we are thinking about this I have a stupid question.
> Currently if a memory mapped region does not fall in a standard PCI
> bar we insist it must be E820 reserved. However if we E820 reserve
> the memory of a standard pci bar it becomes unusable.
>
> Is this really the behavior that we intend?
>
> It gets confusing that E820 reserved gets double duty as memory
> the BIOS is using and MMIO space that is mapped by a non-standard bar.
>

Well, they are both really the same thing... "memory space the OS has no
idea how it works; here there be dragons."

-hpa