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