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/*
* Copyright (c) 2010, 2011, 2012 Richard Braun.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _X86_PARAM_H
#define _X86_PARAM_H
#include <machine/boot.h>
#define __LITTLE_ENDIAN__
/*
* L1 cache line size.
*
* XXX Use this value until processor selection is available.
*/
#define CPU_L1_SIZE 64
/*
* System timer frequency.
*/
#define HZ 100
/*
* 4 KiB virtual pages.
*/
#define PAGE_SHIFT 12
/*
* User space boundaries.
*/
#define VM_MIN_ADDRESS 0UL
#define VM_MAX_ADDRESS (unsigned long)KERNEL_OFFSET
/*
* Kernel stack size for threads and interrupt handlers.
*/
#define STACK_SIZE 4096
/*
* Size of a linear mapping of PTEs (see the pmap module).
*/
#ifdef PAE
#define VM_PMAP_PTEMAP_SIZE 0x800000UL
#else /* PAE */
#define VM_PMAP_PTEMAP_SIZE 0x400000UL
#endif /* PAE */
/*
* Kernel space boundaries.
*
* Addresses beyond VM_MAX_KERNEL_ADDRESS are used for PTEs linear mappings.
* An area the size of such a mapping is reserved to avoid overflows.
*
* See the pmap module for more information.
*/
#define VM_MIN_KERNEL_ADDRESS VM_MAX_ADDRESS
#define VM_MAX_KERNEL_ADDRESS (~(VM_PMAP_PTEMAP_SIZE * 2) + 1)
/*
* Maximum number of physical segments.
*/
#ifdef PAE
#define VM_MAX_PHYS_SEG 2
#else /* PAE */
#define VM_MAX_PHYS_SEG 1
#endif /* PAE */
/*
* Number of physical segment lists.
*/
#define VM_NR_PHYS_SEGLIST VM_MAX_PHYS_SEG
/*
* Segment list priorities.
*/
#define VM_PHYS_SEGLIST_HIGHMEM 1
#define VM_PHYS_SEGLIST_NORMAL 0
/*
* Segment boundaries.
*/
#ifdef PAE
#define VM_PHYS_NORMAL_LIMIT 0x100000000ULL
#define VM_PHYS_HIGHMEM_LIMIT 0x1000000000ULL
#else /* PAE */
#define VM_PHYS_NORMAL_LIMIT 0xfffff000UL
#endif /* PAE */
/*
* Virtual space reserved for kernel map entries.
*/
#define VM_MAP_KENTRY_SIZE 0x800000UL
#endif /* _X86_PARAM_H */
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