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aarch64: Add memory layout for AArch64

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This commit adds the memory layout design for AArch64 in
`arch/src/aarch64/layout.rs` and related changes in
`arch/src/lib.rs` to make sure this commit can build.

Signed-off-by: Michael Zhao <michael.zhao@arm.com>
This commit is contained in:
Michael Zhao 2020-06-05 10:14:17 +08:00 committed by Rob Bradford
parent c7d44b880e
commit ce624a6dee
2 changed files with 86 additions and 6 deletions
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87
arch/src/aarch64/layout.rs
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@ -1,7 +1,86 @@
// Copyright 2020 Arm Limited (or its affiliates). All rights reserved.
// Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: Apache-2.0
/// Kernel command line start address.
pub const CMDLINE_START: usize = 0x0;
/// Kernel command line start address maximum size.
pub const CMDLINE_MAX_SIZE: usize = 0x0;
//
// Memory layout of Aarch64 guest:
//
// Physical +---------------------------------------------------------------+
// address | |
// end | |
// ~ ~ ~ ~
// | |
// | Highmem PCI MMIO space |
// | |
// RAM end +---------------------------------------------------------------+
// (dynamic, | |
// including | |
// hotplug ~ ~ ~ ~
// memory) | |
// | DRAM |
// | |
// 2GB +---------------------------------------------------------------+
// | |
// | Reserved |
// | |
// 1G+256M +---------------------------------------------------------------+
// | |
// | PCI MMCONFIG space |
// | |
// 1GB +---------------------------------------------------------------+
// | |
// | PCI MMIO space |
// | |
// 256 M +---------------------------------------------------------------|
// | |
// | Legacy devices space |
// | |
// 144 M +---------------------------------------------------------------|
// | |
// | Reserverd (now GIC is here) |
// | |
// 0GB +---------------------------------------------------------------+
//
//
use vm_memory::{GuestAddress, GuestUsize};
/// Below this address will reside the GIC, above this address will reside the MMIO devices.
pub const MAPPED_IO_START: u64 = 0x0900_0000;
/// Space 0x0900_0000 ~ 0x1000_0000 is reserved for legacy devices.
pub const LEGACY_SERIAL_MAPPED_IO_START: u64 = 0x0900_0000;
pub const LEGACY_RTC_MAPPED_IO_START: u64 = 0x0901_0000;
/// Legacy space will be allocated at once whiling setting up legacy devices.
pub const LEGACY_DEVICES_MAPPED_IO_SIZE: u64 = 0x0700_0000;
/// Starting from 0x1000_0000 (256MiB), the 768MiB (ends at 1 GiB) is used for PCIE MMIO
pub const PCI_DEVICES_MAPPED_IO_START: u64 = 0x1000_0000;
pub const PCI_DEVICES_MAPPED_IO_SIZE: u64 = 0x3000_0000;
/// PCI MMCONFIG space (start: after the device space at 1 GiB, length: 256MiB)
pub const PCI_MMCONFIG_START: GuestAddress = GuestAddress(0x4000_0000);
pub const PCI_MMCONFIG_SIZE: GuestUsize = 256 << 20;
/// Start of RAM on 64 bit ARM.
pub const RAM_64BIT_START: u64 = 0x8000_0000;
/// Kernel command line maximum size.
/// As per `arch/arm64/include/uapi/asm/setup.h`.
pub const CMDLINE_MAX_SIZE: usize = 2048;
/// Maximum size of the device tree blob as specified in https://www.kernel.org/doc/Documentation/arm64/booting.txt.
pub const FDT_MAX_SIZE: usize = 0x20_0000;
// As per virt/kvm/arm/vgic/vgic-kvm-device.c we need
// the number of interrupts our GIC will support to be:
// * bigger than 32
// * less than 1023 and
// * a multiple of 32.
// We are setting up our interrupt controller to support a maximum of 128 interrupts.
/// First usable interrupt on aarch64.
pub const IRQ_BASE: u32 = 32;
/// Last usable interrupt on aarch64.
pub const IRQ_MAX: u32 = 159;

5
arch/src/lib.rs
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@ -1,3 +1,4 @@
// Copyright 2020 Arm Limited (or its affiliates). All rights reserved.
// Copyright © 2020, Oracle and/or its affiliates.
//
// Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
@ -80,8 +81,8 @@ pub mod aarch64;
#[cfg(target_arch = "aarch64")]
pub use aarch64::{
arch_memory_regions, check_required_kvm_extensions, configure_system, configure_vcpu,
get_host_cpu_phys_bits, get_reserved_mem_addr, layout::CMDLINE_MAX_SIZE, layout::CMDLINE_START,
EntryPoint,
get_host_cpu_phys_bits, get_reserved_mem_addr, layout, layout::CMDLINE_MAX_SIZE,
layout::IRQ_BASE, layout::IRQ_MAX, EntryPoint,
};
#[cfg(target_arch = "x86_64")]