pmap-v6.h revision 295042
1/*- 2 * Copyright 2014 Svatopluk Kraus <onwahe@gmail.com> 3 * Copyright 2014 Michal Meloun <meloun@miracle.cz> 4 * Copyright (c) 1991 Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * the Systems Programming Group of the University of Utah Computer 9 * Science Department and William Jolitz of UUNET Technologies Inc. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * The ARM version of this file was more or less based on the i386 version, 33 * which has the following provenance... 34 * 35 * Derived from hp300 version by Mike Hibler, this version by William 36 * Jolitz uses a recursive map [a pde points to the page directory] to 37 * map the page tables using the pagetables themselves. This is done to 38 * reduce the impact on kernel virtual memory for lots of sparse address 39 * space, and to reduce the cost of memory to each process. 40 * 41 * from: hp300: @(#)pmap.h 7.2 (Berkeley) 12/16/90 42 * from: @(#)pmap.h 7.4 (Berkeley) 5/12/91 43 * from: FreeBSD: src/sys/i386/include/pmap.h,v 1.70 2000/11/30 44 * 45 * $FreeBSD: head/sys/arm/include/pmap-v6.h 295042 2016-01-29 16:01:37Z skra $ 46 */ 47 48#ifndef _MACHINE_PMAP_H_ 49#define _MACHINE_PMAP_H_ 50 51#include <sys/queue.h> 52#include <sys/_cpuset.h> 53#include <sys/_lock.h> 54#include <sys/_mutex.h> 55 56typedef uint32_t pt1_entry_t; /* L1 table entry */ 57typedef uint32_t pt2_entry_t; /* L2 table entry */ 58typedef uint32_t ttb_entry_t; /* TTB entry */ 59 60#ifdef _KERNEL 61 62#if 0 63#define PMAP_PTE_NOCACHE // Use uncached page tables 64#endif 65 66/* 67 * (1) During pmap bootstrap, physical pages for L2 page tables are 68 * allocated in advance which are used for KVA continuous mapping 69 * starting from KERNBASE. This makes things more simple. 70 * (2) During vm subsystem initialization, only vm subsystem itself can 71 * allocate physical memory safely. As pmap_map() is called during 72 * this initialization, we must be prepared for that and have some 73 * preallocated physical pages for L2 page tables. 74 * 75 * Note that some more pages for L2 page tables are preallocated too 76 * for mappings laying above VM_MAX_KERNEL_ADDRESS. 77 */ 78#ifndef NKPT2PG 79/* 80 * The optimal way is to define this in board configuration as 81 * definition here must be safe enough. It means really big. 82 * 83 * 1 GB KVA <=> 256 kernel L2 page table pages 84 * 85 * From real platforms: 86 * 1 GB physical memory <=> 10 pages is enough 87 * 2 GB physical memory <=> 21 pages is enough 88 */ 89#define NKPT2PG 32 90#endif 91 92extern vm_paddr_t phys_avail[]; 93extern vm_paddr_t dump_avail[]; 94extern char *_tmppt; /* poor name! */ 95extern vm_offset_t virtual_avail; 96extern vm_offset_t virtual_end; 97 98/* 99 * Pmap stuff 100 */ 101 102/* 103 * This structure is used to hold a virtual<->physical address 104 * association and is used mostly by bootstrap code 105 */ 106struct pv_addr { 107 SLIST_ENTRY(pv_addr) pv_list; 108 vm_offset_t pv_va; 109 vm_paddr_t pv_pa; 110}; 111#endif 112struct pv_entry; 113struct pv_chunk; 114 115struct md_page { 116 TAILQ_HEAD(,pv_entry) pv_list; 117 uint16_t pt2_wirecount[4]; 118 int pat_mode; 119}; 120 121struct pmap { 122 struct mtx pm_mtx; 123 pt1_entry_t *pm_pt1; /* KVA of pt1 */ 124 pt2_entry_t *pm_pt2tab; /* KVA of pt2 pages table */ 125 TAILQ_HEAD(,pv_chunk) pm_pvchunk; /* list of mappings in pmap */ 126 cpuset_t pm_active; /* active on cpus */ 127 struct pmap_statistics pm_stats; /* pmap statictics */ 128 LIST_ENTRY(pmap) pm_list; /* List of all pmaps */ 129}; 130 131typedef struct pmap *pmap_t; 132 133#ifdef _KERNEL 134extern struct pmap kernel_pmap_store; 135#define kernel_pmap (&kernel_pmap_store) 136 137#define PMAP_LOCK(pmap) mtx_lock(&(pmap)->pm_mtx) 138#define PMAP_LOCK_ASSERT(pmap, type) \ 139 mtx_assert(&(pmap)->pm_mtx, (type)) 140#define PMAP_LOCK_DESTROY(pmap) mtx_destroy(&(pmap)->pm_mtx) 141#define PMAP_LOCK_INIT(pmap) mtx_init(&(pmap)->pm_mtx, "pmap", \ 142 NULL, MTX_DEF | MTX_DUPOK) 143#define PMAP_LOCKED(pmap) mtx_owned(&(pmap)->pm_mtx) 144#define PMAP_MTX(pmap) (&(pmap)->pm_mtx) 145#define PMAP_TRYLOCK(pmap) mtx_trylock(&(pmap)->pm_mtx) 146#define PMAP_UNLOCK(pmap) mtx_unlock(&(pmap)->pm_mtx) 147#endif 148 149/* 150 * For each vm_page_t, there is a list of all currently valid virtual 151 * mappings of that page. An entry is a pv_entry_t, the list is pv_list. 152 */ 153typedef struct pv_entry { 154 vm_offset_t pv_va; /* virtual address for mapping */ 155 TAILQ_ENTRY(pv_entry) pv_next; 156} *pv_entry_t; 157 158/* 159 * pv_entries are allocated in chunks per-process. This avoids the 160 * need to track per-pmap assignments. 161 */ 162#define _NPCM 11 163#define _NPCPV 336 164struct pv_chunk { 165 pmap_t pc_pmap; 166 TAILQ_ENTRY(pv_chunk) pc_list; 167 uint32_t pc_map[_NPCM]; /* bitmap; 1 = free */ 168 TAILQ_ENTRY(pv_chunk) pc_lru; 169 struct pv_entry pc_pventry[_NPCPV]; 170}; 171 172#ifdef _KERNEL 173struct pcb; 174extern ttb_entry_t pmap_kern_ttb; /* TTB for kernel pmap */ 175 176#define pmap_page_get_memattr(m) ((vm_memattr_t)(m)->md.pat_mode) 177#define pmap_page_is_write_mapped(m) (((m)->aflags & PGA_WRITEABLE) != 0) 178 179/* 180 * Only the following functions or macros may be used before pmap_bootstrap() 181 * is called: pmap_kenter(), pmap_kextract(), pmap_kremove(), vtophys(), and 182 * vtopte2(). 183 */ 184void pmap_bootstrap(vm_offset_t ); 185void pmap_kenter(vm_offset_t , vm_paddr_t ); 186void *pmap_kenter_temporary(vm_paddr_t , int ); 187void pmap_kremove(vm_offset_t); 188void *pmap_mapdev(vm_paddr_t, vm_size_t); 189void *pmap_mapdev_attr(vm_paddr_t, vm_size_t, int); 190boolean_t pmap_page_is_mapped(vm_page_t ); 191void pmap_page_set_memattr(vm_page_t , vm_memattr_t ); 192void pmap_unmapdev(vm_offset_t, vm_size_t); 193void pmap_kenter_device(vm_offset_t, vm_size_t, vm_paddr_t); 194void pmap_kremove_device(vm_offset_t, vm_size_t); 195void pmap_set_pcb_pagedir(pmap_t , struct pcb *); 196 197void pmap_tlb_flush(pmap_t , vm_offset_t ); 198void pmap_tlb_flush_range(pmap_t , vm_offset_t , vm_size_t ); 199 200void pmap_dcache_wb_range(vm_paddr_t , vm_size_t , vm_memattr_t ); 201 202vm_paddr_t pmap_kextract(vm_offset_t ); 203vm_paddr_t pmap_dump_kextract(vm_offset_t, pt2_entry_t *); 204 205int pmap_fault(pmap_t , vm_offset_t , uint32_t , int , bool); 206#define vtophys(va) pmap_kextract((vm_offset_t)(va)) 207 208void pmap_set_tex(void); 209void reinit_mmu(ttb_entry_t ttb, u_int aux_clr, u_int aux_set); 210 211/* 212 * Pre-bootstrap epoch functions set. 213 */ 214void pmap_bootstrap_prepare(vm_paddr_t ); 215vm_paddr_t pmap_preboot_get_pages(u_int ); 216void pmap_preboot_map_pages(vm_paddr_t , vm_offset_t , u_int ); 217vm_offset_t pmap_preboot_reserve_pages(u_int ); 218vm_offset_t pmap_preboot_get_vpages(u_int ); 219void pmap_preboot_map_attr(vm_paddr_t , vm_offset_t , vm_size_t , 220 int , int ); 221static __inline void 222pmap_map_chunk(vm_offset_t l1pt, vm_offset_t va, vm_offset_t pa, 223 vm_size_t size, int prot, int cache) 224{ 225 pmap_preboot_map_attr(pa, va, size, prot, cache); 226} 227 228/* 229 * This structure is used by machine-dependent code to describe 230 * static mappings of devices, created at bootstrap time. 231 */ 232struct pmap_devmap { 233 vm_offset_t pd_va; /* virtual address */ 234 vm_paddr_t pd_pa; /* physical address */ 235 vm_size_t pd_size; /* size of region */ 236 vm_prot_t pd_prot; /* protection code */ 237 int pd_cache; /* cache attributes */ 238}; 239 240void pmap_devmap_bootstrap(const struct pmap_devmap *); 241 242#endif /* _KERNEL */ 243 244// ----------------- TO BE DELETED --------------------------------------------- 245#include <machine/pte-v6.h> 246 247#ifdef _KERNEL 248 249/* 250 * sys/arm/arm/elf_trampoline.c 251 * sys/arm/arm/genassym.c 252 * sys/arm/arm/machdep.c 253 * sys/arm/arm/mp_machdep.c 254 * sys/arm/arm/locore.S 255 * sys/arm/arm/pmap.c 256 * sys/arm/arm/swtch.S 257 * sys/arm/at91/at91_machdep.c 258 * sys/arm/cavium/cns11xx/econa_machdep.c 259 * sys/arm/s3c2xx0/s3c24x0_machdep.c 260 * sys/arm/xscale/ixp425/avila_machdep.c 261 * sys/arm/xscale/i8134x/crb_machdep.c 262 * sys/arm/xscale/i80321/ep80219_machdep.c 263 * sys/arm/xscale/i80321/iq31244_machdep.c 264 * sys/arm/xscale/pxa/pxa_machdep.c 265 */ 266#define PMAP_DOMAIN_KERNEL 0 /* The kernel uses domain #0 */ 267 268/* 269 * sys/arm/arm/cpufunc.c 270 */ 271void pmap_pte_init_mmu_v6(void); 272void vector_page_setprot(int); 273 274/* 275 * sys/arm/arm/bus_space_generic.c (just comment) 276 * sys/arm/arm/devmap.c 277 * sys/arm/arm/pmap.c (just comment) 278 * sys/arm/at91/at91_machdep.c 279 * sys/arm/cavium/cns11xx/econa_machdep.c 280 * sys/arm/freescale/imx/imx6_machdep.c (just comment) 281 * sys/arm/mv/orion/db88f5xxx.c 282 * sys/arm/mv/mv_localbus.c 283 * sys/arm/mv/mv_machdep.c 284 * sys/arm/mv/mv_pci.c 285 * sys/arm/s3c2xx0/s3c24x0_machdep.c 286 * sys/arm/versatile/versatile_machdep.c 287 * sys/arm/xscale/ixp425/avila_machdep.c 288 * sys/arm/xscale/i8134x/crb_machdep.c 289 * sys/arm/xscale/i80321/ep80219_machdep.c 290 * sys/arm/xscale/i80321/iq31244_machdep.c 291 * sys/arm/xscale/pxa/pxa_machdep.c 292 */ 293#define PTE_DEVICE PTE2_ATTR_DEVICE 294 295 296 297#endif /* _KERNEL */ 298// ----------------------------------------------------------------------------- 299 300#endif /* !_MACHINE_PMAP_H_ */ 301