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