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/*
* Copyright (c) 1994 The University of Utah and
* the Computer Systems Laboratory at the University of Utah (CSL).
* All rights reserved.
*
* Permission to use, copy, modify and distribute this software is hereby
* granted provided that (1) source code retains these copyright, permission,
* and disclaimer notices, and (2) redistributions including binaries
* reproduce the notices in supporting documentation, and (3) all advertising
* materials mentioning features or use of this software display the following
* acknowledgement: ``This product includes software developed by the
* Computer Systems Laboratory at the University of Utah.''
*
* THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
* IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
* ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* CSL requests users of this software to return to csl-dist@cs.utah.edu any
* improvements that they make and grant CSL redistribution rights.
*
* Author: Bryan Ford, University of Utah CSL
*/
#ifndef _I386_KERNEL_I386_VM_PARAM_
#define _I386_KERNEL_I386_VM_PARAM_
/* XXX use xu/vm_param.h */
#include <mach/vm_param.h>
#ifdef MACH_XEN
#include <xen/public/xen.h>
#endif
/* The kernel address space is usually 1GB, usually starting at virtual address 0. */
#ifdef MACH_XEN
#define VM_MIN_KERNEL_ADDRESS 0xC0000000UL
#else /* MACH_XEN */
#define VM_MIN_KERNEL_ADDRESS 0x00000000UL
#endif /* MACH_XEN */
#ifdef MACH_XEN
#if PAE
#define HYP_VIRT_START HYPERVISOR_VIRT_START_PAE
#else /* PAE */
#define HYP_VIRT_START HYPERVISOR_VIRT_START_NONPAE
#endif /* PAE */
#define VM_MAX_KERNEL_ADDRESS (HYP_VIRT_START - LINEAR_MIN_KERNEL_ADDRESS + VM_MIN_KERNEL_ADDRESS)
#else /* MACH_XEN */
#define VM_MAX_KERNEL_ADDRESS (LINEAR_MAX_KERNEL_ADDRESS - LINEAR_MIN_KERNEL_ADDRESS + VM_MIN_KERNEL_ADDRESS)
#endif /* MACH_XEN */
/* Reserve mapping room for kmem. */
#ifdef MACH_XEN
#define VM_KERNEL_MAP_SIZE (224 * 1024 * 1024)
#else
#define VM_KERNEL_MAP_SIZE (192 * 1024 * 1024)
#endif
/* The kernel virtual address space is actually located
at high linear addresses.
This is the kernel address range in linear addresses. */
#define LINEAR_MIN_KERNEL_ADDRESS (VM_MAX_ADDRESS)
#define LINEAR_MAX_KERNEL_ADDRESS (0xffffffffUL)
#ifdef MACH_XEN
/* need room for mmu updates (2*8bytes) */
#define KERNEL_STACK_SIZE (4*I386_PGBYTES)
#define INTSTACK_SIZE (4*I386_PGBYTES)
#else /* MACH_XEN */
#define KERNEL_STACK_SIZE (1*I386_PGBYTES)
#define INTSTACK_SIZE (1*I386_PGBYTES)
#endif /* MACH_XEN */
/* interrupt stack size */
/*
* Conversion between 80386 pages and VM pages
*/
#define trunc_i386_to_vm(p) (atop(trunc_page(i386_ptob(p))))
#define round_i386_to_vm(p) (atop(round_page(i386_ptob(p))))
#define vm_to_i386(p) (i386_btop(ptoa(p)))
/*
* Physical memory is direct-mapped to virtual memory
* starting at virtual address VM_MIN_KERNEL_ADDRESS.
*/
#define phystokv(a) ((vm_offset_t)(a) + VM_MIN_KERNEL_ADDRESS)
/*
* This can not be used with virtual mappings, but can be used during bootstrap
*/
#define _kvtophys(a) ((vm_offset_t)(a) - VM_MIN_KERNEL_ADDRESS)
/*
* Kernel virtual memory is actually at 0xc0000000 in linear addresses.
*/
#define kvtolin(a) ((vm_offset_t)(a) - VM_MIN_KERNEL_ADDRESS + LINEAR_MIN_KERNEL_ADDRESS)
#define lintokv(a) ((vm_offset_t)(a) - LINEAR_MIN_KERNEL_ADDRESS + VM_MIN_KERNEL_ADDRESS)
#endif /* _I386_KERNEL_I386_VM_PARAM_ */
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