1 /* 2 * Copyright 2001-2002, Travis Geiselbrecht. All rights reserved. 3 * Distributed under the terms of the NewOS License. 4 */ 5 #ifndef _KERNEL_ARCH_RISCV64_KERNEL_H 6 #define _KERNEL_ARCH_RISCV64_KERNEL_H 7 8 #include <arch/cpu.h> 9 10 #warning Review arch_kernel.h 11 12 // memory layout 13 #define KERNEL_LOAD_BASE 0x80000000 14 #define KERNEL_LOAD_BASE_64_BIT 0xffffffff80000000ll 15 16 17 #if defined(__riscv64__) 18 19 // Base of the kernel address space. 20 #define KERNEL_BASE 0xffffff0000000000 21 #define KERNEL_SIZE 0x10000000000 22 #define KERNEL_TOP (KERNEL_BASE + (KERNEL_SIZE - 1)) 23 24 // Kernel physical memory map area. 25 #define KERNEL_PMAP_BASE 0xffffff0000000000 26 #define KERNEL_PMAP_SIZE 0x8000000000 27 28 // Userspace address space layout. 29 // There is a 2MB hole just before the end of the bottom half of the address 30 // space. This means that if userland passes in a buffer that crosses into the 31 // uncanonical address region, it will be caught through a page fault. 32 #define USER_BASE 0x100000 33 #define USER_BASE_ANY USER_BASE 34 #define USER_SIZE (0x800000000000 - (0x200000 + USER_BASE)) 35 #define USER_TOP (USER_BASE + (USER_SIZE - 1)) 36 37 #define KERNEL_USER_DATA_BASE 0x7f0000000000 38 #define USER_STACK_REGION 0x7f0000000000 39 #define USER_STACK_REGION_SIZE ((USER_TOP - USER_STACK_REGION) + 1) 40 41 #else /* ! __riscv64__ */ 42 #warning Unknown RISC-V Architecture! 43 #endif 44 45 #endif /* _KERNEL_ARCH_RISCV64_KERNEL_H */ 46