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arch: riscv: Introduce UEFI related constants

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Set UEFI_START and UEFI_SIZE for riscv64 layout.

Signed-off-by: Ruoqing He <heruoqing@iscas.ac.cn>
This commit is contained in:
Ruoqing He 2025-08-10 23:54:37 +00:00 • committed by Rob Bradford
parent 9825397350
commit 2524b015b8
1 changed files with 9 additions and 2 deletions
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11
arch/src/riscv64/layout.rs
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@ -44,16 +44,23 @@
// | |
// | APLICs |
// | |
// 4 MB +---------------------------------------------------------------+
// | UEFI flash |
// 0 GB +---------------------------------------------------------------+
//
//
use vm_memory::GuestAddress;
/// 0x0 ~ 0x40_0000 (4 MiB) is reserved to UEFI
/// UEFI binary size is required less than 3 MiB, reserving 4 MiB is enough.
pub const UEFI_START: GuestAddress = GuestAddress(0);
pub const UEFI_SIZE: u64 = 0x040_0000;
/// AIA related devices
/// See https://elixir.bootlin.com/linux/v6.10/source/arch/riscv/include/uapi/asm/kvm.h
/// 0x0 ~ 0x0400_0000 (64 MiB) resides APLICs
pub const APLIC_START: GuestAddress = GuestAddress(0);
/// 0x40_0000 ~ 0x0400_0000 (64 MiB) resides APLICs
pub const APLIC_START: GuestAddress = GuestAddress(0x40_0000);
pub const APLIC_SIZE: u64 = 0x4000;
/// 0x0400_0000 ~ 0x0800_0000 (64 MiB) resides IMSICs