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/*
* Copyright (c) 2010, 2011, 2012, 2013 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/>.
*
*
* This file is a top header in the inclusion hierarchy, and shouldn't include
* other headers that may cause circular dependencies.
*/
#ifndef _X86_PARAM_H
#define _X86_PARAM_H
#include <kern/macros.h>
#define __LITTLE_ENDIAN__
/*
* L1 cache line size.
*
* XXX Use this value until processor selection is available.
*/
#define CPU_L1_SIZE 64
/*
* Code/data alignment.
*/
#define TEXT_ALIGN 16
#ifdef __LP64__
#define DATA_ALIGN 8
#else /* __LP64__ */
#define DATA_ALIGN 4
#endif /* __LP64__ */
/*
* System timer frequency.
*
* The selected value of 200 translates to a period of 5ms, small enough to
* provide low latency, and is practical as both a dividend and divisor.
*/
#define HZ 200
/*
* 4 KiB pages.
*/
#define PAGE_SHIFT 12
#define PAGE_SIZE (1 << PAGE_SHIFT)
#define PAGE_MASK (PAGE_SIZE - 1)
/*
* Kernel stack size for threads and interrupt handlers.
*/
#define STACK_SIZE PAGE_SIZE
/*
* Virtual memory properties.
*/
/*
* User space boundaries.
*/
#define VM_MIN_ADDRESS DECL_CONST(0, UL)
#ifdef __LP64__
#define VM_MAX_ADDRESS DECL_CONST(0x800000000000, UL)
#else /* __LP64__ */
#define VM_MAX_ADDRESS DECL_CONST(0xc0000000, UL)
#endif/* __LP64__ */
/*
* Size of the recursive mapping of PTEs.
*
* See the pmap module for more information.
*/
#ifdef __LP64__
#define VM_PMAP_PTEMAP_SIZE DECL_CONST(0x8000000000, UL)
#else /* __LP64__ */
#ifdef X86_PAE
#define VM_PMAP_PTEMAP_SIZE DECL_CONST(0x800000, UL)
#else /* X86_PAE */
#define VM_PMAP_PTEMAP_SIZE DECL_CONST(0x400000, UL)
#endif /* X86_PAE */
#endif /* __LP64__ */
/*
* Location of the recursive mapping of PTEs.
*
* See the pmap module for more information.
*/
#ifdef __LP64__
#define VM_PMAP_PTEMAP_ADDRESS DECL_CONST(0xffff800000000000, UL)
#else /* __LP64__ */
#define VM_PMAP_PTEMAP_ADDRESS VM_MAX_ADDRESS
#endif /* __LP64__ */
/*
* Kernel space boundaries.
*/
#define VM_MIN_KERNEL_ADDRESS (VM_PMAP_PTEMAP_ADDRESS + VM_PMAP_PTEMAP_SIZE)
/*
* In addition to being the end of the kernel address space, this is also
* where the kernel image is loaded. Excluding the kernel image from its
* address space simplifies bootstrapping, and also saves a static VM map
* entry.
*/
#ifdef __LP64__
#define VM_MAX_KERNEL_ADDRESS DECL_CONST(0xffffffff80000000, UL)
#else /* __LP64__ */
#define VM_MAX_KERNEL_ADDRESS DECL_CONST(0xfc000000, UL)
#endif /* __LP64__ */
/*
* Virtual space reserved for kernel map entries.
*/
#define VM_MAP_KENTRY_SIZE DECL_CONST(0x800000, UL)
/*
* Physical memory properties.
*/
#ifdef __LP64__
#define VM_MAX_PHYS_SEG 2
#define VM_PHYS_NORMAL_LIMIT DECL_CONST(0x100000000, UL)
#define VM_PHYS_HIGHMEM_LIMIT DECL_CONST(0x10000000000000, UL)
#else /* __LP64__ */
#ifdef X86_PAE
#define VM_MAX_PHYS_SEG 2
#define VM_PHYS_NORMAL_LIMIT DECL_CONST(0x100000000, ULL)
#define VM_PHYS_HIGHMEM_LIMIT DECL_CONST(0x10000000000000, ULL)
#else /* X86_PAE */
#define VM_MAX_PHYS_SEG 1
#define VM_PHYS_NORMAL_LIMIT DECL_CONST(0xfffff000, UL)
#endif /* X86_PAE */
#endif /* __LP64__ */
/*
* Physical segment indexes.
*/
#define VM_PHYS_SEG_NORMAL 0
#define VM_PHYS_SEG_HIGHMEM 1
/*
* Number of physical segment lists.
*/
#define VM_NR_PHYS_SEGLIST VM_MAX_PHYS_SEG
/*
* Segment list priorities.
*/
#define VM_PHYS_SEGLIST_NORMAL 0
#define VM_PHYS_SEGLIST_HIGHMEM 1
#endif /* _X86_PARAM_H */
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