29 lines
1.0 KiB
C
29 lines
1.0 KiB
C
|
/*
|
||
|
|
** Copyright 2001, Travis Geiselbrecht. All rights reserved.
|
||
|
|
** Distributed under the terms of the NewOS License.
|
||
|
|
*/
|
||
|
|
#ifndef _PPC_KERNEL_H
|
||
|
|
#define _PPC_KERNEL_H
|
||
|
|
|
||
|
|
// 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_SIZE (0x80000000 - (0x10000 + 0x100000))
|
||
|
|
#define USER_TOP (USER_BASE + USER_SIZE)
|
||
|
|
|
||
|
|
#define USER_STACK_REGION 0x70000000
|
||
|
|
#define USER_STACK_REGION_SIZE (USER_BASE + (USER_SIZE - USER_STACK_REGION))
|
||
|
|
|
||
|
|
#endif
|