1 // Copyright 2023, The Android Open Source Project 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 //! Memory layout for crosvm for aarch64 architecture. 16 //! 17 //! https://crosvm.dev/book/appendix/memory_layout.html#common-layout 18 19 use crate::memory::page_4kb_of; 20 use core::ops::Range; 21 use static_assertions::const_assert_eq; 22 23 /// The start address of MMIO space. 24 pub const MMIO_START: usize = 0x0; 25 /// The end address of MMIO space. 26 pub const MMIO_END: usize = PVMFW_START; 27 /// MMIO range. 28 pub const MMIO_RANGE: Range<usize> = MMIO_START..MMIO_END; 29 30 /// Start pvmfw region. 31 pub const PVMFW_START: usize = 0x7fc00000; 32 33 /// The start of the system's contiguous "main" memory. 34 pub const MEM_START: usize = 0x8000_0000; 35 36 /// Size of the FDT region as defined by crosvm, both in kernel and BIOS modes. 37 pub const FDT_MAX_SIZE: usize = 2 << 20; 38 39 /// First address that can't be translated by a level 1 TTBR0_EL1. 40 pub const MAX_VIRT_ADDR: usize = 1 << 40; 41 42 /// Base memory-mapped addresses of the UART devices. 43 /// 44 /// See SERIAL_ADDR in https://crosvm.dev/book/appendix/memory_layout.html#common-layout. 45 pub const UART_ADDRESSES: [usize; 4] = [0x3f8, 0x2f8, 0x3e8, 0x2e8]; 46 47 /// Address of the single page containing all the UART devices. 48 pub const UART_PAGE_ADDR: usize = 0; 49 const_assert_eq!(UART_PAGE_ADDR, page_4kb_of(UART_ADDRESSES[0])); 50 const_assert_eq!(UART_PAGE_ADDR, page_4kb_of(UART_ADDRESSES[1])); 51 const_assert_eq!(UART_PAGE_ADDR, page_4kb_of(UART_ADDRESSES[2])); 52 const_assert_eq!(UART_PAGE_ADDR, page_4kb_of(UART_ADDRESSES[3])); 53