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Re: [PATCH] Add 2 more E820 to ACPI specification
From: |
Robert Millan |
Subject: |
Re: [PATCH] Add 2 more E820 to ACPI specification |
Date: |
Tue, 19 Jan 2010 23:53:54 +0100 |
User-agent: |
Mutt/1.5.18 (2008-05-17) |
On Fri, Jan 15, 2010 at 06:18:43PM +0100, Vladimir 'φ-coder/phcoder' Serbinenko
wrote:
> Hello. This defines 2 more types for mmap_type in a way to match E820
> values. As grub legacy and grub2 both just pass E820 values through it
> shouldn't be any problem.
Note that although Multiboot's memory map format is modelled after e820,
it is defined by us, not by BIOS vendors.
> -value of 1 indicates available @sc{ram}, and all other values currently
> +value of 1 indicates available @sc{ram}, value of 3 indicates usable memory
> +holding ACPI information,
I'm concerned about increasing the amount of arch-specific references; what do
Multiboot kernels that use ACPI currently do?
> value of 4 indicates reserved memory which needs to
> +be preserved on hibernation and all other values currently
> indicated a reserved area.
What's the difference between this reserved memory and a reserved area?
--
Robert Millan
"Be the change you want to see in the world" -- Gandhi