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Update memory layout to accommodate uefi on arm64.

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For now, memory layout on arm64 is sparse and is conflict with uefi.
Here, we do some rearrangement to let it compact and compatible with
uefi support.

Signed-off-by: Jianyong Wu <jianyong.wu@arm.com>
This commit is contained in:
Jianyong Wu 2021-04-12 15:33:02 +08:00 committed by Sebastien Boeuf
parent 99694cf5c1
commit 740994542a
1 changed files with 23 additions and 9 deletions
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32
arch/src/aarch64/layout.rs
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@ -19,15 +19,14 @@
// memory) | |
// | DRAM |
// | |
// 2GB +---------------------------------------------------------------+
// | |
// | Reserved |
// | |
// 1G+256M +---------------------------------------------------------------+
// 1GB +---------------------------------------------------------------+
// | |
// | PCI MMCONFIG space |
// | |
// 1GB +---------------------------------------------------------------+
// 768 M +---------------------------------------------------------------+
// | |
// | |
// | PCI MMIO space |
// | |
@ -36,8 +35,10 @@
// | Legacy devices space |
// | |
// 144 M +---------------------------------------------------------------|
// | |
// | Reserved (now GIC is here) |
// 128 M +---------------------------------------------------------------+
// | |
// | UEFI space |
// | |
// 0GB +---------------------------------------------------------------+
//
@ -45,6 +46,11 @@
use vm_memory::GuestAddress;
/// 0x0 ~ 0x800_0000 is reserved to uefi
pub const UEFI_START: u64 = 0x0;
pub const MEM_UEFI_START: GuestAddress = GuestAddress(0);
pub const UEFI_SIZE: u64 = 0x0800_0000;
/// Below this address will reside the GIC, above this address will reside the MMIO devices.
pub const MAPPED_IO_START: u64 = 0x0900_0000;
@ -53,19 +59,23 @@ pub const LEGACY_SERIAL_MAPPED_IO_START: u64 = 0x0900_0000;
pub const LEGACY_RTC_MAPPED_IO_START: u64 = 0x0901_0000;
pub const LEGACY_GPIO_MAPPED_IO_START: u64 = 0x0902_0000;
/// Space 0x0902_0000 ~ 0x903_0000 is reserved for pcie io address
pub const MEM_PCI_IO_START: GuestAddress = GuestAddress(0x0902_0000);
pub const MEM_PCI_IO_SIZE: u64 = 0x10000;
/// 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
/// Starting from 0x1000_0000 (256MiB) to 0x3000_0000 (768MiB) is used for PCIE MMIO
pub const MEM_32BIT_DEVICES_START: GuestAddress = GuestAddress(0x1000_0000);
pub const MEM_32BIT_DEVICES_SIZE: u64 = 0x3000_0000;
pub const MEM_32BIT_DEVICES_SIZE: u64 = 0x2000_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_START: GuestAddress = GuestAddress(0x3000_0000);
pub const PCI_MMCONFIG_SIZE: u64 = 256 << 20;
/// Start of RAM on 64 bit ARM.
pub const RAM_64BIT_START: u64 = 0x8000_0000;
pub const RAM_64BIT_START: u64 = 0x4000_0000;
/// Kernel command line maximum size.
/// As per `arch/arm64/include/uapi/asm/setup.h`.
@ -74,6 +84,10 @@ 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;
/// Put ACPI table above dtb
pub const ACPI_START: u64 = RAM_64BIT_START + FDT_MAX_SIZE as u64;
pub const RSDP_POINTER: GuestAddress = GuestAddress(ACPI_START);
// 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