1/* 2 * Copyright 2001-2002, Travis Geiselbrecht. All rights reserved. 3 * Distributed under the terms of the NewOS License. 4 */ 5#ifndef _KERNEL_ARCH_MIPSEL_KERNEL_H 6#define _KERNEL_ARCH_MIPSEL_KERNEL_H 7 8#include <arch/cpu.h> 9 10#warning IMPLEMENT arch_kernel.h 11 12// memory layout 13#define KERNEL_BASE 0x80000000 14#define KERNEL_SIZE 0x80000000 15#define KERNEL_TOP (KERNEL_BASE + (KERNEL_SIZE - 1)) 16 17/* 18 * User space layout is a little special: 19 * The user space does not completely cover the space not covered by the kernel. 20 * This is accomplished by starting user space at 1Mb and running to 64kb short 21 * of kernel space. The lower 1Mb reserved spot makes it easy to find null 22 * pointer references and guarantees a region wont be placed there. The 64kb 23 * region assures a user space thread cannot pass a buffer into the kernel as 24 * part of a syscall that would cross into kernel space. 25 */ 26#define USER_BASE 0x100000 27#define USER_BASE_ANY USER_BASE 28#define USER_SIZE (0x80000000 - (0x10000 + USER_BASE)) 29#define USER_TOP (USER_BASE + (USER_SIZE - 1)) 30 31#define KERNEL_USER_DATA_BASE 0x60000000 32#define USER_STACK_REGION 0x70000000 33#define USER_STACK_REGION_SIZE ((USER_TOP - USER_STACK_REGION) + 1) 34 35#endif /* _KERNEL_ARCH_MIPSEL_KERNEL_H */ 36 37