| pmap.h (69377) | pmap.h (83757) |
|---|---|
| 1/* 2 * Copyright (c) 1991 Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * the Systems Programming Group of the University of Utah Computer 7 * Science Department and William Jolitz of UUNET Technologies Inc. 8 * --- 28 unchanged lines hidden (view full) --- 37 * Derived from hp300 version by Mike Hibler, this version by William 38 * Jolitz uses a recursive map [a pde points to the page directory] to 39 * map the page tables using the pagetables themselves. This is done to 40 * reduce the impact on kernel virtual memory for lots of sparse address 41 * space, and to reduce the cost of memory to each process. 42 * 43 * from: hp300: @(#)pmap.h 7.2 (Berkeley) 12/16/90 44 * from: @(#)pmap.h 7.4 (Berkeley) 5/12/91 | 1/* 2 * Copyright (c) 1991 Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * the Systems Programming Group of the University of Utah Computer 7 * Science Department and William Jolitz of UUNET Technologies Inc. 8 * --- 28 unchanged lines hidden (view full) --- 37 * Derived from hp300 version by Mike Hibler, this version by William 38 * Jolitz uses a recursive map [a pde points to the page directory] to 39 * map the page tables using the pagetables themselves. This is done to 40 * reduce the impact on kernel virtual memory for lots of sparse address 41 * space, and to reduce the cost of memory to each process. 42 * 43 * from: hp300: @(#)pmap.h 7.2 (Berkeley) 12/16/90 44 * from: @(#)pmap.h 7.4 (Berkeley) 5/12/91 |
| 45 * $FreeBSD: head/sys/amd64/include/pmap.h 69377 2000-11-30 01:53:02Z peter $ | 45 * $FreeBSD: head/sys/amd64/include/pmap.h 83757 2001-09-21 06:23:03Z peter $ |
| 46 */ 47 48#ifndef _MACHINE_PMAP_H_ 49#define _MACHINE_PMAP_H_ 50 51/* 52 * Page-directory and page-table entires follow this format, with a few 53 * of the fields not present here and there, depending on a lot of things. --- 24 unchanged lines hidden (view full) --- 78 * Page Protection Exception bits 79 */ 80 81#define PGEX_P 0x01 /* Protection violation vs. not present */ 82#define PGEX_W 0x02 /* during a Write cycle */ 83#define PGEX_U 0x04 /* access from User mode (UPL) */ 84 85/* | 46 */ 47 48#ifndef _MACHINE_PMAP_H_ 49#define _MACHINE_PMAP_H_ 50 51/* 52 * Page-directory and page-table entires follow this format, with a few 53 * of the fields not present here and there, depending on a lot of things. --- 24 unchanged lines hidden (view full) --- 78 * Page Protection Exception bits 79 */ 80 81#define PGEX_P 0x01 /* Protection violation vs. not present */ 82#define PGEX_W 0x02 /* during a Write cycle */ 83#define PGEX_U 0x04 /* access from User mode (UPL) */ 84 85/* |
| 86 * Size of Kernel address space. This is the number of page table pages 87 * (4MB each) to use for the kernel. 256 pages == 1 Gigabyte. 88 * This **MUST** be a multiple of 4 (eg: 252, 256, 260, etc). 89 */ 90#ifndef KVA_PAGES 91#define KVA_PAGES 256 92#endif 93 94/* |
|
| 86 * Pte related macros 87 */ 88#define VADDR(pdi, pti) ((vm_offset_t)(((pdi)<<PDRSHIFT)|((pti)<<PAGE_SHIFT))) 89 90#ifndef NKPT | 95 * Pte related macros 96 */ 97#define VADDR(pdi, pti) ((vm_offset_t)(((pdi)<<PDRSHIFT)|((pti)<<PAGE_SHIFT))) 98 99#ifndef NKPT |
| 91#define NKPT 30 /* actual number of kernel page tables */ | 100#define NKPT 30 /* actual number of kernel page tables */ |
| 92#endif 93#ifndef NKPDE 94#ifdef SMP | 101#endif 102#ifndef NKPDE 103#ifdef SMP |
| 95#define NKPDE 254 /* addressable number of page tables/pde's */ | 104#define NKPDE (KVA_PAGES - 2) /* addressable number of page tables/pde's */ |
| 96#else | 105#else |
| 97#define NKPDE 255 /* addressable number of page tables/pde's */ 98#endif /* SMP */ | 106#define NKPDE (KVA_PAGES - 1) /* addressable number of page tables/pde's */ |
| 99#endif | 107#endif |
| 108#endif |
|
| 100 101/* 102 * The *PTDI values control the layout of virtual memory 103 * 104 * XXX This works for now, but I am not real happy with it, I'll fix it 105 * right after I fix locore.s and the magic 28K hole 106 * 107 * SMP_PRIVPAGES: The per-cpu address space is 0xff80000 -> 0xffbfffff --- 161 unchanged lines hidden --- | 109 110/* 111 * The *PTDI values control the layout of virtual memory 112 * 113 * XXX This works for now, but I am not real happy with it, I'll fix it 114 * right after I fix locore.s and the magic 28K hole 115 * 116 * SMP_PRIVPAGES: The per-cpu address space is 0xff80000 -> 0xffbfffff --- 161 unchanged lines hidden --- |