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arch, vmm: Start documenting major regions of RAM and reserved memory

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Using the existing layout module start documenting the major regions of
RAM and those areas that are reserved. Some of the constants have also
been renamed to be more consistent and some functions that returned
constant variables have been replaced.

Future commits will move more constants into this file to make it the
canonical source of information about the memory layout.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford
2019-09-27 14:11:50 +01:00
committed by Sebastien Boeuf
parent f63cb85f93
commit 0e7a1fc923
5 changed files with 78 additions and 70 deletions
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7
arch/src/lib.rs
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@@ -21,7 +21,6 @@ extern crate linux_loader;
extern crate vm_memory;
use std::result;
use vm_memory::GuestAddress;
#[derive(Debug, PartialEq)]
pub enum Error {
@@ -53,9 +52,6 @@ pub enum RegionType {
Reserved,
}
// 1MB. We don't put anything above here except the kernel itself.
pub const HIMEM_START: GuestAddress = GuestAddress(0x100000);
#[cfg(target_arch = "aarch64")]
pub mod aarch64;
@@ -70,6 +66,5 @@ pub mod x86_64;
#[cfg(target_arch = "x86_64")]
pub use x86_64::{
arch_memory_regions, configure_system, get_32bit_gap_start as get_reserved_mem_addr,
layout::CMDLINE_MAX_SIZE, layout::CMDLINE_START,
arch_memory_regions, configure_system, layout, layout::CMDLINE_MAX_SIZE, layout::CMDLINE_START,
};