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