1/* 2** Copyright 2001-2002, Travis Geiselbrecht. All rights reserved. 3** Copyright 2019, Adrien Destugues, pulkomandy@pulkomandy.tk 4** Distributed under the terms of the MIT License. 5*/ 6#ifndef _KERNEL_ARCH_SPARC_KERNEL_H 7#define _KERNEL_ARCH_SPARC_KERNEL_H 8 9#include <arch/cpu.h> 10 11// memory layout 12#define KERNEL_LOAD_BASE_64_BIT 0xffffffff80000000ll 13 14// Base of the kernel address space. 15// KERNEL_BASE is the base of the kernel address space. This differs from the 16// address where the kernel is loaded to: the kernel is loaded in the top 2GB 17// of the virtual address space as required by GCC's kernel code model. The 18// whole kernel address space is the top 512GB of the address space. 19#define KERNEL_BASE 0xffffff0000000000 20#define KERNEL_SIZE 0x10000000000 21#define KERNEL_TOP (KERNEL_BASE + (KERNEL_SIZE - 1)) 22 23 24// Userspace address space layout. 25// There is a 2MB hole just before the end of the bottom half of the address 26// space. This means that if userland passes in a buffer that crosses into the 27// uncanonical address region, it will be caught through a page fault. 28#define USER_BASE 0x100000 29#define USER_BASE_ANY USER_BASE 30#define USER_SIZE (0x800000000000 - (0x200000 + USER_BASE)) 31#define USER_TOP (USER_BASE + (USER_SIZE - 1)) 32 33#define KERNEL_USER_DATA_BASE 0x7f0000000000 34#define USER_STACK_REGION 0x7f0000000000 35#define USER_STACK_REGION_SIZE ((USER_TOP - USER_STACK_REGION) + 1) 36 37#endif /* _KERNEL_ARCH_SPARC_KERNEL_H */ 38 39