/* ** Copyright 2001-2002, Travis Geiselbrecht. All rights reserved. ** Distributed under the terms of the NewOS License. */ #ifndef _KERNEL_ARCH_ARM_KERNEL_H #define _KERNEL_ARCH_ARM_KERNEL_H #include // memory layout #define KERNEL_BASE 0x80000000 #define KERNEL_SIZE 0x80000000 #define KERNEL_TOP (KERNEL_BASE + (KERNEL_SIZE - 1)) /* ** User space layout is a little special: ** The user space does not completely cover the space not covered by the kernel. ** This is accomplished by starting user space at 1Mb and running to 64kb short of kernel space. ** The lower 1Mb reserved spot makes it easy to find null pointer references and guarantees a ** region wont be placed there. The 64kb region assures a user space thread cannot pass ** a buffer into the kernel as part of a syscall that would cross into kernel space. */ #define USER_BASE 0x100000 #define USER_BASE_ANY USER_BASE #define USER_SIZE (0x80000000 - (0x10000 + 0x100000)) #define USER_TOP (USER_BASE + USER_SIZE) #define KERNEL_USER_DATA_BASE 0x6fff0000 #define USER_STACK_REGION 0x70000000 #define USER_STACK_REGION_SIZE (USER_TOP - USER_STACK_REGION) #endif /* _KERNEL_ARCH_ARM_KERNEL_H */