Hi H.Peter,
On 04/04/2013 09:13 AM, H. Peter Anvin wrote:
On 04/03/2013 06:11 PM, Simon Jeons wrote:
Why we consider boot_cpu_data.x86_phys_bits instead of e820 map here?
Because x86_phys_bits is what controls how much address space the
processor has. e820 tells us how much *RAM* the machine has, or
specifically, how much RAM the machine had on boot.
e820 also contain mmio, correct? So cpu should not access address beyond
e820 map(RAM+MMIO).
-hpa
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