2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD AND BSD-4-Clause
4 * Copyright (c) 2001 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Matt Thomas <matt@3am-software.com> of Allegro Networks, Inc.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
32 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
33 * Copyright (C) 1995, 1996 TooLs GmbH.
34 * All rights reserved.
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 * 3. All advertising materials mentioning features or use of this software
45 * must display the following acknowledgement:
46 * This product includes software developed by TooLs GmbH.
47 * 4. The name of TooLs GmbH may not be used to endorse or promote products
48 * derived from this software without specific prior written permission.
50 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
51 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
52 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
53 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
54 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
55 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
56 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
57 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
58 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
59 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
61 * $NetBSD: pmap.c,v 1.28 2000/03/26 20:42:36 kleink Exp $
64 * Copyright (C) 2001 Benno Rice.
65 * All rights reserved.
67 * Redistribution and use in source and binary forms, with or without
68 * modification, are permitted provided that the following conditions
70 * 1. Redistributions of source code must retain the above copyright
71 * notice, this list of conditions and the following disclaimer.
72 * 2. Redistributions in binary form must reproduce the above copyright
73 * notice, this list of conditions and the following disclaimer in the
74 * documentation and/or other materials provided with the distribution.
76 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
77 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
78 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
79 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
80 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
81 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
82 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
83 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
84 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
85 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
88 #include <sys/cdefs.h>
89 __FBSDID("$FreeBSD$");
92 * Manages physical address maps.
94 * Since the information managed by this module is also stored by the
95 * logical address mapping module, this module may throw away valid virtual
96 * to physical mappings at almost any time. However, invalidations of
97 * mappings must be done as requested.
99 * In order to cope with hardware architectures which make virtual to
100 * physical map invalidates expensive, this module may delay invalidate
101 * reduced protection operations until such time as they are actually
102 * necessary. This module is given full information as to which processors
103 * are currently using which maps, and to when physical maps must be made
107 #include "opt_kstack_pages.h"
109 #include <sys/param.h>
110 #include <sys/kernel.h>
111 #include <sys/conf.h>
112 #include <sys/queue.h>
113 #include <sys/cpuset.h>
114 #include <sys/kerneldump.h>
116 #include <sys/lock.h>
117 #include <sys/msgbuf.h>
118 #include <sys/mutex.h>
119 #include <sys/proc.h>
120 #include <sys/rwlock.h>
121 #include <sys/sched.h>
122 #include <sys/sysctl.h>
123 #include <sys/systm.h>
124 #include <sys/vmmeter.h>
126 #include <dev/ofw/openfirm.h>
129 #include <vm/vm_param.h>
130 #include <vm/vm_kern.h>
131 #include <vm/vm_page.h>
132 #include <vm/vm_map.h>
133 #include <vm/vm_object.h>
134 #include <vm/vm_extern.h>
135 #include <vm/vm_page.h>
136 #include <vm/vm_phys.h>
137 #include <vm/vm_pageout.h>
140 #include <machine/cpu.h>
141 #include <machine/platform.h>
142 #include <machine/bat.h>
143 #include <machine/frame.h>
144 #include <machine/md_var.h>
145 #include <machine/psl.h>
146 #include <machine/pte.h>
147 #include <machine/smp.h>
148 #include <machine/sr.h>
149 #include <machine/mmuvar.h>
150 #include <machine/trap.h>
154 #define TODO panic("%s: not implemented", __func__);
156 #define VSID_MAKE(sr, hash) ((sr) | (((hash) & 0xfffff) << 4))
157 #define VSID_TO_SR(vsid) ((vsid) & 0xf)
158 #define VSID_TO_HASH(vsid) (((vsid) >> 4) & 0xfffff)
167 extern unsigned char _etext[];
168 extern unsigned char _end[];
171 * Map of physical memory regions.
173 static struct mem_region *regions;
174 static struct mem_region *pregions;
175 static u_int phys_avail_count;
176 static int regions_sz, pregions_sz;
177 static struct ofw_map *translations;
180 * Lock for the pteg and pvo tables.
182 struct mtx moea_table_mutex;
183 struct mtx moea_vsid_mutex;
185 /* tlbie instruction synchronization */
186 static struct mtx tlbie_mtx;
191 static struct pteg *moea_pteg_table;
192 u_int moea_pteg_count;
193 u_int moea_pteg_mask;
198 struct pvo_head *moea_pvo_table; /* pvo entries by pteg index */
199 struct pvo_head moea_pvo_kunmanaged =
200 LIST_HEAD_INITIALIZER(moea_pvo_kunmanaged); /* list of unmanaged pages */
202 static struct rwlock_padalign pvh_global_lock;
204 uma_zone_t moea_upvo_zone; /* zone for pvo entries for unmanaged pages */
205 uma_zone_t moea_mpvo_zone; /* zone for pvo entries for managed pages */
207 #define BPVO_POOL_SIZE 32768
208 static struct pvo_entry *moea_bpvo_pool;
209 static int moea_bpvo_pool_index = 0;
211 #define VSID_NBPW (sizeof(u_int32_t) * 8)
212 static u_int moea_vsid_bitmap[NPMAPS / VSID_NBPW];
214 static boolean_t moea_initialized = FALSE;
219 u_int moea_pte_valid = 0;
220 u_int moea_pte_overflow = 0;
221 u_int moea_pte_replacements = 0;
222 u_int moea_pvo_entries = 0;
223 u_int moea_pvo_enter_calls = 0;
224 u_int moea_pvo_remove_calls = 0;
225 u_int moea_pte_spills = 0;
226 SYSCTL_INT(_machdep, OID_AUTO, moea_pte_valid, CTLFLAG_RD, &moea_pte_valid,
228 SYSCTL_INT(_machdep, OID_AUTO, moea_pte_overflow, CTLFLAG_RD,
229 &moea_pte_overflow, 0, "");
230 SYSCTL_INT(_machdep, OID_AUTO, moea_pte_replacements, CTLFLAG_RD,
231 &moea_pte_replacements, 0, "");
232 SYSCTL_INT(_machdep, OID_AUTO, moea_pvo_entries, CTLFLAG_RD, &moea_pvo_entries,
234 SYSCTL_INT(_machdep, OID_AUTO, moea_pvo_enter_calls, CTLFLAG_RD,
235 &moea_pvo_enter_calls, 0, "");
236 SYSCTL_INT(_machdep, OID_AUTO, moea_pvo_remove_calls, CTLFLAG_RD,
237 &moea_pvo_remove_calls, 0, "");
238 SYSCTL_INT(_machdep, OID_AUTO, moea_pte_spills, CTLFLAG_RD,
239 &moea_pte_spills, 0, "");
242 * Allocate physical memory for use in moea_bootstrap.
244 static vm_offset_t moea_bootstrap_alloc(vm_size_t, u_int);
249 static int moea_pte_insert(u_int, struct pte *);
254 static int moea_pvo_enter(pmap_t, uma_zone_t, struct pvo_head *,
255 vm_offset_t, vm_paddr_t, u_int, int);
256 static void moea_pvo_remove(struct pvo_entry *, int);
257 static struct pvo_entry *moea_pvo_find_va(pmap_t, vm_offset_t, int *);
258 static struct pte *moea_pvo_to_pte(const struct pvo_entry *, int);
263 static int moea_enter_locked(pmap_t, vm_offset_t, vm_page_t,
264 vm_prot_t, u_int, int8_t);
265 static void moea_syncicache(vm_paddr_t, vm_size_t);
266 static boolean_t moea_query_bit(vm_page_t, int);
267 static u_int moea_clear_bit(vm_page_t, int);
268 static void moea_kremove(vm_offset_t);
269 int moea_pte_spill(vm_offset_t);
272 * Kernel MMU interface
274 void moea_clear_modify(vm_page_t);
275 void moea_copy_page(vm_page_t, vm_page_t);
276 void moea_copy_pages(vm_page_t *ma, vm_offset_t a_offset,
277 vm_page_t *mb, vm_offset_t b_offset, int xfersize);
278 int moea_enter(pmap_t, vm_offset_t, vm_page_t, vm_prot_t, u_int,
280 void moea_enter_object(pmap_t, vm_offset_t, vm_offset_t, vm_page_t,
282 void moea_enter_quick(pmap_t, vm_offset_t, vm_page_t, vm_prot_t);
283 vm_paddr_t moea_extract(pmap_t, vm_offset_t);
284 vm_page_t moea_extract_and_hold(pmap_t, vm_offset_t, vm_prot_t);
285 void moea_init(void);
286 boolean_t moea_is_modified(vm_page_t);
287 boolean_t moea_is_prefaultable(pmap_t, vm_offset_t);
288 boolean_t moea_is_referenced(vm_page_t);
289 int moea_ts_referenced(vm_page_t);
290 vm_offset_t moea_map(vm_offset_t *, vm_paddr_t, vm_paddr_t, int);
291 boolean_t moea_page_exists_quick(pmap_t, vm_page_t);
292 void moea_page_init(vm_page_t);
293 int moea_page_wired_mappings(vm_page_t);
294 int moea_pinit(pmap_t);
295 void moea_pinit0(pmap_t);
296 void moea_protect(pmap_t, vm_offset_t, vm_offset_t, vm_prot_t);
297 void moea_qenter(vm_offset_t, vm_page_t *, int);
298 void moea_qremove(vm_offset_t, int);
299 void moea_release(pmap_t);
300 void moea_remove(pmap_t, vm_offset_t, vm_offset_t);
301 void moea_remove_all(vm_page_t);
302 void moea_remove_write(vm_page_t);
303 void moea_unwire(pmap_t, vm_offset_t, vm_offset_t);
304 void moea_zero_page(vm_page_t);
305 void moea_zero_page_area(vm_page_t, int, int);
306 void moea_activate(struct thread *);
307 void moea_deactivate(struct thread *);
308 void moea_cpu_bootstrap(int);
309 void moea_bootstrap(vm_offset_t, vm_offset_t);
310 void *moea_mapdev(vm_paddr_t, vm_size_t);
311 void *moea_mapdev_attr(vm_paddr_t, vm_size_t, vm_memattr_t);
312 void moea_unmapdev(vm_offset_t, vm_size_t);
313 vm_paddr_t moea_kextract(vm_offset_t);
314 void moea_kenter_attr(vm_offset_t, vm_paddr_t, vm_memattr_t);
315 void moea_kenter(vm_offset_t, vm_paddr_t);
316 void moea_page_set_memattr(vm_page_t m, vm_memattr_t ma);
317 boolean_t moea_dev_direct_mapped(vm_paddr_t, vm_size_t);
318 static void moea_sync_icache(pmap_t, vm_offset_t, vm_size_t);
319 void moea_dumpsys_map(vm_paddr_t pa, size_t sz, void **va);
320 void moea_scan_init(void);
321 vm_offset_t moea_quick_enter_page(vm_page_t m);
322 void moea_quick_remove_page(vm_offset_t addr);
323 boolean_t moea_page_is_mapped(vm_page_t m);
324 static int moea_map_user_ptr(pmap_t pm,
325 volatile const void *uaddr, void **kaddr, size_t ulen, size_t *klen);
326 static int moea_decode_kernel_ptr(vm_offset_t addr,
327 int *is_user, vm_offset_t *decoded_addr);
330 static struct pmap_funcs moea_methods = {
331 .clear_modify = moea_clear_modify,
332 .copy_page = moea_copy_page,
333 .copy_pages = moea_copy_pages,
335 .enter_object = moea_enter_object,
336 .enter_quick = moea_enter_quick,
337 .extract = moea_extract,
338 .extract_and_hold = moea_extract_and_hold,
340 .is_modified = moea_is_modified,
341 .is_prefaultable = moea_is_prefaultable,
342 .is_referenced = moea_is_referenced,
343 .ts_referenced = moea_ts_referenced,
345 .page_exists_quick = moea_page_exists_quick,
346 .page_init = moea_page_init,
347 .page_wired_mappings = moea_page_wired_mappings,
349 .pinit0 = moea_pinit0,
350 .protect = moea_protect,
351 .qenter = moea_qenter,
352 .qremove = moea_qremove,
353 .release = moea_release,
354 .remove = moea_remove,
355 .remove_all = moea_remove_all,
356 .remove_write = moea_remove_write,
357 .sync_icache = moea_sync_icache,
358 .unwire = moea_unwire,
359 .zero_page = moea_zero_page,
360 .zero_page_area = moea_zero_page_area,
361 .activate = moea_activate,
362 .deactivate = moea_deactivate,
363 .page_set_memattr = moea_page_set_memattr,
364 .quick_enter_page = moea_quick_enter_page,
365 .quick_remove_page = moea_quick_remove_page,
366 .page_is_mapped = moea_page_is_mapped,
368 /* Internal interfaces */
369 .bootstrap = moea_bootstrap,
370 .cpu_bootstrap = moea_cpu_bootstrap,
371 .mapdev_attr = moea_mapdev_attr,
372 .mapdev = moea_mapdev,
373 .unmapdev = moea_unmapdev,
374 .kextract = moea_kextract,
375 .kenter = moea_kenter,
376 .kenter_attr = moea_kenter_attr,
377 .dev_direct_mapped = moea_dev_direct_mapped,
378 .dumpsys_pa_init = moea_scan_init,
379 .dumpsys_map_chunk = moea_dumpsys_map,
380 .map_user_ptr = moea_map_user_ptr,
381 .decode_kernel_ptr = moea_decode_kernel_ptr,
384 MMU_DEF(oea_mmu, MMU_TYPE_OEA, moea_methods);
386 static __inline uint32_t
387 moea_calc_wimg(vm_paddr_t pa, vm_memattr_t ma)
392 if (ma != VM_MEMATTR_DEFAULT) {
394 case VM_MEMATTR_UNCACHEABLE:
395 return (PTE_I | PTE_G);
396 case VM_MEMATTR_CACHEABLE:
398 case VM_MEMATTR_WRITE_COMBINING:
399 case VM_MEMATTR_WRITE_BACK:
400 case VM_MEMATTR_PREFETCHABLE:
402 case VM_MEMATTR_WRITE_THROUGH:
403 return (PTE_W | PTE_M);
408 * Assume the page is cache inhibited and access is guarded unless
409 * it's in our available memory array.
411 pte_lo = PTE_I | PTE_G;
412 for (i = 0; i < pregions_sz; i++) {
413 if ((pa >= pregions[i].mr_start) &&
414 (pa < (pregions[i].mr_start + pregions[i].mr_size))) {
424 * Translate OFW translations into VM attributes.
426 static __inline vm_memattr_t
427 moea_bootstrap_convert_wimg(uint32_t mode)
431 case (PTE_I | PTE_G):
432 /* PCI device memory */
433 return VM_MEMATTR_UNCACHEABLE;
435 /* Explicitly coherent */
436 return VM_MEMATTR_CACHEABLE;
437 case 0: /* Default claim */
438 case 2: /* Alternate PP bits set by OF for the original payload */
439 /* "Normal" memory. */
440 return VM_MEMATTR_DEFAULT;
443 /* Err on the side of caution for unknowns */
444 /* XXX should we panic instead? */
445 return VM_MEMATTR_UNCACHEABLE;
450 tlbie(vm_offset_t va)
453 mtx_lock_spin(&tlbie_mtx);
454 __asm __volatile("ptesync");
455 __asm __volatile("tlbie %0" :: "r"(va));
456 __asm __volatile("eieio; tlbsync; ptesync");
457 mtx_unlock_spin(&tlbie_mtx);
465 for (va = 0; va < 0x00040000; va += 0x00001000) {
466 __asm __volatile("tlbie %0" :: "r"(va));
469 __asm __volatile("tlbsync");
474 va_to_sr(u_int *sr, vm_offset_t va)
476 return (sr[(uintptr_t)va >> ADDR_SR_SHFT]);
479 static __inline u_int
480 va_to_pteg(u_int sr, vm_offset_t addr)
484 hash = (sr & SR_VSID_MASK) ^ (((u_int)addr & ADDR_PIDX) >>
486 return (hash & moea_pteg_mask);
489 static __inline struct pvo_head *
490 vm_page_to_pvoh(vm_page_t m)
493 return (&m->md.mdpg_pvoh);
497 moea_attr_clear(vm_page_t m, int ptebit)
500 rw_assert(&pvh_global_lock, RA_WLOCKED);
501 m->md.mdpg_attrs &= ~ptebit;
505 moea_attr_fetch(vm_page_t m)
508 return (m->md.mdpg_attrs);
512 moea_attr_save(vm_page_t m, int ptebit)
515 rw_assert(&pvh_global_lock, RA_WLOCKED);
516 m->md.mdpg_attrs |= ptebit;
520 moea_pte_compare(const struct pte *pt, const struct pte *pvo_pt)
522 if (pt->pte_hi == pvo_pt->pte_hi)
529 moea_pte_match(struct pte *pt, u_int sr, vm_offset_t va, int which)
531 return (pt->pte_hi & ~PTE_VALID) ==
532 (((sr & SR_VSID_MASK) << PTE_VSID_SHFT) |
533 ((va >> ADDR_API_SHFT) & PTE_API) | which);
537 moea_pte_create(struct pte *pt, u_int sr, vm_offset_t va, u_int pte_lo)
540 mtx_assert(&moea_table_mutex, MA_OWNED);
543 * Construct a PTE. Default to IMB initially. Valid bit only gets
544 * set when the real pte is set in memory.
546 * Note: Don't set the valid bit for correct operation of tlb update.
548 pt->pte_hi = ((sr & SR_VSID_MASK) << PTE_VSID_SHFT) |
549 (((va & ADDR_PIDX) >> ADDR_API_SHFT) & PTE_API);
554 moea_pte_synch(struct pte *pt, struct pte *pvo_pt)
557 mtx_assert(&moea_table_mutex, MA_OWNED);
558 pvo_pt->pte_lo |= pt->pte_lo & (PTE_REF | PTE_CHG);
562 moea_pte_clear(struct pte *pt, vm_offset_t va, int ptebit)
565 mtx_assert(&moea_table_mutex, MA_OWNED);
568 * As shown in Section 7.6.3.2.3
570 pt->pte_lo &= ~ptebit;
575 moea_pte_set(struct pte *pt, struct pte *pvo_pt)
578 mtx_assert(&moea_table_mutex, MA_OWNED);
579 pvo_pt->pte_hi |= PTE_VALID;
582 * Update the PTE as defined in section 7.6.3.1.
583 * Note that the REF/CHG bits are from pvo_pt and thus should have
584 * been saved so this routine can restore them (if desired).
586 pt->pte_lo = pvo_pt->pte_lo;
588 pt->pte_hi = pvo_pt->pte_hi;
594 moea_pte_unset(struct pte *pt, struct pte *pvo_pt, vm_offset_t va)
597 mtx_assert(&moea_table_mutex, MA_OWNED);
598 pvo_pt->pte_hi &= ~PTE_VALID;
601 * Force the reg & chg bits back into the PTEs.
606 * Invalidate the pte.
608 pt->pte_hi &= ~PTE_VALID;
613 * Save the reg & chg bits.
615 moea_pte_synch(pt, pvo_pt);
620 moea_pte_change(struct pte *pt, struct pte *pvo_pt, vm_offset_t va)
626 moea_pte_unset(pt, pvo_pt, va);
627 moea_pte_set(pt, pvo_pt);
631 * Quick sort callout for comparing memory regions.
633 static int om_cmp(const void *a, const void *b);
636 om_cmp(const void *a, const void *b)
638 const struct ofw_map *mapa;
639 const struct ofw_map *mapb;
643 if (mapa->om_pa < mapb->om_pa)
645 else if (mapa->om_pa > mapb->om_pa)
652 moea_cpu_bootstrap(int ap)
659 __asm __volatile("mtdbatu 0,%0" :: "r"(battable[0].batu));
660 __asm __volatile("mtdbatl 0,%0" :: "r"(battable[0].batl));
662 __asm __volatile("mtibatu 0,%0" :: "r"(battable[0].batu));
663 __asm __volatile("mtibatl 0,%0" :: "r"(battable[0].batl));
667 __asm __volatile("mtdbatu 1,%0" :: "r"(battable[8].batu));
668 __asm __volatile("mtdbatl 1,%0" :: "r"(battable[8].batl));
671 __asm __volatile("mtibatu 1,%0" :: "r"(0));
672 __asm __volatile("mtdbatu 2,%0" :: "r"(0));
673 __asm __volatile("mtibatu 2,%0" :: "r"(0));
674 __asm __volatile("mtdbatu 3,%0" :: "r"(0));
675 __asm __volatile("mtibatu 3,%0" :: "r"(0));
678 for (i = 0; i < 16; i++)
679 mtsrin(i << ADDR_SR_SHFT, kernel_pmap->pm_sr[i]);
682 sdr = (u_int)moea_pteg_table | (moea_pteg_mask >> 10);
683 __asm __volatile("mtsdr1 %0" :: "r"(sdr));
690 moea_bootstrap(vm_offset_t kernelstart, vm_offset_t kernelend)
693 phandle_t chosen, mmu;
696 vm_size_t size, physsz, hwphyssz;
697 vm_offset_t pa, va, off;
701 * Map PCI memory space.
703 battable[0x8].batl = BATL(0x80000000, BAT_I|BAT_G, BAT_PP_RW);
704 battable[0x8].batu = BATU(0x80000000, BAT_BL_256M, BAT_Vs);
706 battable[0x9].batl = BATL(0x90000000, BAT_I|BAT_G, BAT_PP_RW);
707 battable[0x9].batu = BATU(0x90000000, BAT_BL_256M, BAT_Vs);
709 battable[0xa].batl = BATL(0xa0000000, BAT_I|BAT_G, BAT_PP_RW);
710 battable[0xa].batu = BATU(0xa0000000, BAT_BL_256M, BAT_Vs);
712 battable[0xb].batl = BATL(0xb0000000, BAT_I|BAT_G, BAT_PP_RW);
713 battable[0xb].batu = BATU(0xb0000000, BAT_BL_256M, BAT_Vs);
718 __asm __volatile("mtdbatu 1,%0" :: "r"(battable[8].batu));
719 __asm __volatile("mtdbatl 1,%0" :: "r"(battable[8].batl));
722 /* set global direct map flag */
725 mem_regions(&pregions, &pregions_sz, ®ions, ®ions_sz);
726 CTR0(KTR_PMAP, "moea_bootstrap: physical memory");
728 for (i = 0; i < pregions_sz; i++) {
732 CTR3(KTR_PMAP, "physregion: %#x - %#x (%#x)",
733 pregions[i].mr_start,
734 pregions[i].mr_start + pregions[i].mr_size,
735 pregions[i].mr_size);
737 * Install entries into the BAT table to allow all
738 * of physmem to be convered by on-demand BAT entries.
739 * The loop will sometimes set the same battable element
740 * twice, but that's fine since they won't be used for
743 pa = pregions[i].mr_start & 0xf0000000;
744 end = pregions[i].mr_start + pregions[i].mr_size;
746 u_int n = pa >> ADDR_SR_SHFT;
748 battable[n].batl = BATL(pa, BAT_M, BAT_PP_RW);
749 battable[n].batu = BATU(pa, BAT_BL_256M, BAT_Vs);
750 pa += SEGMENT_LENGTH;
754 if (PHYS_AVAIL_ENTRIES < regions_sz)
755 panic("moea_bootstrap: phys_avail too small");
757 phys_avail_count = 0;
760 TUNABLE_ULONG_FETCH("hw.physmem", (u_long *) &hwphyssz);
761 for (i = 0, j = 0; i < regions_sz; i++, j += 2) {
762 CTR3(KTR_PMAP, "region: %#x - %#x (%#x)", regions[i].mr_start,
763 regions[i].mr_start + regions[i].mr_size,
766 (physsz + regions[i].mr_size) >= hwphyssz) {
767 if (physsz < hwphyssz) {
768 phys_avail[j] = regions[i].mr_start;
769 phys_avail[j + 1] = regions[i].mr_start +
776 phys_avail[j] = regions[i].mr_start;
777 phys_avail[j + 1] = regions[i].mr_start + regions[i].mr_size;
779 physsz += regions[i].mr_size;
782 /* Check for overlap with the kernel and exception vectors */
783 for (j = 0; j < 2*phys_avail_count; j+=2) {
784 if (phys_avail[j] < EXC_LAST)
785 phys_avail[j] += EXC_LAST;
787 if (kernelstart >= phys_avail[j] &&
788 kernelstart < phys_avail[j+1]) {
789 if (kernelend < phys_avail[j+1]) {
790 phys_avail[2*phys_avail_count] =
791 (kernelend & ~PAGE_MASK) + PAGE_SIZE;
792 phys_avail[2*phys_avail_count + 1] =
797 phys_avail[j+1] = kernelstart & ~PAGE_MASK;
800 if (kernelend >= phys_avail[j] &&
801 kernelend < phys_avail[j+1]) {
802 if (kernelstart > phys_avail[j]) {
803 phys_avail[2*phys_avail_count] = phys_avail[j];
804 phys_avail[2*phys_avail_count + 1] =
805 kernelstart & ~PAGE_MASK;
809 phys_avail[j] = (kernelend & ~PAGE_MASK) + PAGE_SIZE;
813 physmem = btoc(physsz);
816 * Allocate PTEG table.
819 moea_pteg_count = PTEGCOUNT;
821 moea_pteg_count = 0x1000;
823 while (moea_pteg_count < physmem)
824 moea_pteg_count <<= 1;
826 moea_pteg_count >>= 1;
827 #endif /* PTEGCOUNT */
829 size = moea_pteg_count * sizeof(struct pteg);
830 CTR2(KTR_PMAP, "moea_bootstrap: %d PTEGs, %d bytes", moea_pteg_count,
832 moea_pteg_table = (struct pteg *)moea_bootstrap_alloc(size, size);
833 CTR1(KTR_PMAP, "moea_bootstrap: PTEG table at %p", moea_pteg_table);
834 bzero((void *)moea_pteg_table, moea_pteg_count * sizeof(struct pteg));
835 moea_pteg_mask = moea_pteg_count - 1;
838 * Allocate pv/overflow lists.
840 size = sizeof(struct pvo_head) * moea_pteg_count;
841 moea_pvo_table = (struct pvo_head *)moea_bootstrap_alloc(size,
843 CTR1(KTR_PMAP, "moea_bootstrap: PVO table at %p", moea_pvo_table);
844 for (i = 0; i < moea_pteg_count; i++)
845 LIST_INIT(&moea_pvo_table[i]);
848 * Initialize the lock that synchronizes access to the pteg and pvo
851 mtx_init(&moea_table_mutex, "pmap table", NULL, MTX_DEF |
853 mtx_init(&moea_vsid_mutex, "VSID table", NULL, MTX_DEF);
855 mtx_init(&tlbie_mtx, "tlbie", NULL, MTX_SPIN);
858 * Initialise the unmanaged pvo pool.
860 moea_bpvo_pool = (struct pvo_entry *)moea_bootstrap_alloc(
861 BPVO_POOL_SIZE*sizeof(struct pvo_entry), 0);
862 moea_bpvo_pool_index = 0;
865 * Make sure kernel vsid is allocated as well as VSID 0.
867 moea_vsid_bitmap[(KERNEL_VSIDBITS & (NPMAPS - 1)) / VSID_NBPW]
868 |= 1 << (KERNEL_VSIDBITS % VSID_NBPW);
869 moea_vsid_bitmap[0] |= 1;
872 * Initialize the kernel pmap (which is statically allocated).
874 PMAP_LOCK_INIT(kernel_pmap);
875 for (i = 0; i < 16; i++)
876 kernel_pmap->pm_sr[i] = EMPTY_SEGMENT + i;
877 CPU_FILL(&kernel_pmap->pm_active);
878 RB_INIT(&kernel_pmap->pmap_pvo);
881 * Initialize the global pv list lock.
883 rw_init(&pvh_global_lock, "pmap pv global");
886 * Set up the Open Firmware mappings
888 chosen = OF_finddevice("/chosen");
889 if (chosen != -1 && OF_getprop(chosen, "mmu", &mmui, 4) != -1 &&
890 (mmu = OF_instance_to_package(mmui)) != -1 &&
891 (sz = OF_getproplen(mmu, "translations")) != -1) {
893 for (i = 0; phys_avail[i] != 0; i += 2) {
894 if (phys_avail[i + 1] >= sz) {
895 translations = (struct ofw_map *)phys_avail[i];
899 if (translations == NULL)
900 panic("moea_bootstrap: no space to copy translations");
901 bzero(translations, sz);
902 if (OF_getprop(mmu, "translations", translations, sz) == -1)
903 panic("moea_bootstrap: can't get ofw translations");
904 CTR0(KTR_PMAP, "moea_bootstrap: translations");
905 sz /= sizeof(*translations);
906 qsort(translations, sz, sizeof (*translations), om_cmp);
907 for (i = 0; i < sz; i++) {
908 CTR3(KTR_PMAP, "translation: pa=%#x va=%#x len=%#x",
909 translations[i].om_pa, translations[i].om_va,
910 translations[i].om_len);
913 * If the mapping is 1:1, let the RAM and device
914 * on-demand BAT tables take care of the translation.
916 * However, always enter mappings for segment 16,
917 * which is mixed-protection and therefore not
918 * compatible with a BAT entry.
920 if ((translations[i].om_va >> ADDR_SR_SHFT) != 0xf &&
921 translations[i].om_va == translations[i].om_pa)
924 /* Enter the pages */
925 for (off = 0; off < translations[i].om_len;
927 moea_kenter_attr(translations[i].om_va + off,
928 translations[i].om_pa + off,
929 moea_bootstrap_convert_wimg(translations[i].om_mode));
934 * Calculate the last available physical address.
936 for (i = 0; phys_avail[i + 2] != 0; i += 2)
938 Maxmem = powerpc_btop(phys_avail[i + 1]);
940 moea_cpu_bootstrap(0);
941 mtmsr(mfmsr() | PSL_DR | PSL_IR);
945 * Set the start and end of kva.
947 virtual_avail = VM_MIN_KERNEL_ADDRESS;
948 virtual_end = VM_MAX_SAFE_KERNEL_ADDRESS;
951 * Allocate a kernel stack with a guard page for thread0 and map it
952 * into the kernel page map.
954 pa = moea_bootstrap_alloc(kstack_pages * PAGE_SIZE, PAGE_SIZE);
955 va = virtual_avail + KSTACK_GUARD_PAGES * PAGE_SIZE;
956 virtual_avail = va + kstack_pages * PAGE_SIZE;
957 CTR2(KTR_PMAP, "moea_bootstrap: kstack0 at %#x (%#x)", pa, va);
958 thread0.td_kstack = va;
959 thread0.td_kstack_pages = kstack_pages;
960 for (i = 0; i < kstack_pages; i++) {
967 * Allocate virtual address space for the message buffer.
969 pa = msgbuf_phys = moea_bootstrap_alloc(msgbufsize, PAGE_SIZE);
970 msgbufp = (struct msgbuf *)virtual_avail;
972 virtual_avail += round_page(msgbufsize);
973 while (va < virtual_avail) {
980 * Allocate virtual address space for the dynamic percpu area.
982 pa = moea_bootstrap_alloc(DPCPU_SIZE, PAGE_SIZE);
983 dpcpu = (void *)virtual_avail;
985 virtual_avail += DPCPU_SIZE;
986 while (va < virtual_avail) {
991 dpcpu_init(dpcpu, 0);
995 * Activate a user pmap. The pmap must be activated before it's address
996 * space can be accessed in any way.
999 moea_activate(struct thread *td)
1004 * Load all the data we need up front to encourage the compiler to
1005 * not issue any loads while we have interrupts disabled below.
1007 pm = &td->td_proc->p_vmspace->vm_pmap;
1008 pmr = pm->pmap_phys;
1010 CPU_SET(PCPU_GET(cpuid), &pm->pm_active);
1011 PCPU_SET(curpmap, pmr);
1013 mtsrin(USER_SR << ADDR_SR_SHFT, td->td_pcb->pcb_cpu.aim.usr_vsid);
1017 moea_deactivate(struct thread *td)
1021 pm = &td->td_proc->p_vmspace->vm_pmap;
1022 CPU_CLR(PCPU_GET(cpuid), &pm->pm_active);
1023 PCPU_SET(curpmap, NULL);
1027 moea_unwire(pmap_t pm, vm_offset_t sva, vm_offset_t eva)
1029 struct pvo_entry key, *pvo;
1032 key.pvo_vaddr = sva;
1033 for (pvo = RB_NFIND(pvo_tree, &pm->pmap_pvo, &key);
1034 pvo != NULL && PVO_VADDR(pvo) < eva;
1035 pvo = RB_NEXT(pvo_tree, &pm->pmap_pvo, pvo)) {
1036 if ((pvo->pvo_vaddr & PVO_WIRED) == 0)
1037 panic("moea_unwire: pvo %p is missing PVO_WIRED", pvo);
1038 pvo->pvo_vaddr &= ~PVO_WIRED;
1039 pm->pm_stats.wired_count--;
1045 moea_copy_page(vm_page_t msrc, vm_page_t mdst)
1050 dst = VM_PAGE_TO_PHYS(mdst);
1051 src = VM_PAGE_TO_PHYS(msrc);
1053 bcopy((void *)src, (void *)dst, PAGE_SIZE);
1057 moea_copy_pages(vm_page_t *ma, vm_offset_t a_offset,
1058 vm_page_t *mb, vm_offset_t b_offset, int xfersize)
1061 vm_offset_t a_pg_offset, b_pg_offset;
1064 while (xfersize > 0) {
1065 a_pg_offset = a_offset & PAGE_MASK;
1066 cnt = min(xfersize, PAGE_SIZE - a_pg_offset);
1067 a_cp = (char *)VM_PAGE_TO_PHYS(ma[a_offset >> PAGE_SHIFT]) +
1069 b_pg_offset = b_offset & PAGE_MASK;
1070 cnt = min(cnt, PAGE_SIZE - b_pg_offset);
1071 b_cp = (char *)VM_PAGE_TO_PHYS(mb[b_offset >> PAGE_SHIFT]) +
1073 bcopy(a_cp, b_cp, cnt);
1081 * Zero a page of physical memory by temporarily mapping it into the tlb.
1084 moea_zero_page(vm_page_t m)
1086 vm_offset_t off, pa = VM_PAGE_TO_PHYS(m);
1088 for (off = 0; off < PAGE_SIZE; off += cacheline_size)
1089 __asm __volatile("dcbz 0,%0" :: "r"(pa + off));
1093 moea_zero_page_area(vm_page_t m, int off, int size)
1095 vm_offset_t pa = VM_PAGE_TO_PHYS(m);
1096 void *va = (void *)(pa + off);
1102 moea_quick_enter_page(vm_page_t m)
1105 return (VM_PAGE_TO_PHYS(m));
1109 moea_quick_remove_page(vm_offset_t addr)
1114 moea_page_is_mapped(vm_page_t m)
1116 return (!LIST_EMPTY(&(m)->md.mdpg_pvoh));
1120 * Map the given physical page at the specified virtual address in the
1121 * target pmap with the protection requested. If specified the page
1122 * will be wired down.
1125 moea_enter(pmap_t pmap, vm_offset_t va, vm_page_t m, vm_prot_t prot,
1126 u_int flags, int8_t psind)
1131 rw_wlock(&pvh_global_lock);
1133 error = moea_enter_locked(pmap, va, m, prot, flags, psind);
1134 rw_wunlock(&pvh_global_lock);
1136 if (error != ENOMEM)
1137 return (KERN_SUCCESS);
1138 if ((flags & PMAP_ENTER_NOSLEEP) != 0)
1139 return (KERN_RESOURCE_SHORTAGE);
1140 VM_OBJECT_ASSERT_UNLOCKED(m->object);
1146 * Map the given physical page at the specified virtual address in the
1147 * target pmap with the protection requested. If specified the page
1148 * will be wired down.
1150 * The global pvh and pmap must be locked.
1153 moea_enter_locked(pmap_t pmap, vm_offset_t va, vm_page_t m, vm_prot_t prot,
1154 u_int flags, int8_t psind __unused)
1156 struct pvo_head *pvo_head;
1158 u_int pte_lo, pvo_flags;
1161 if (pmap_bootstrapped)
1162 rw_assert(&pvh_global_lock, RA_WLOCKED);
1163 PMAP_LOCK_ASSERT(pmap, MA_OWNED);
1164 if ((m->oflags & VPO_UNMANAGED) == 0) {
1165 if ((flags & PMAP_ENTER_QUICK_LOCKED) == 0)
1166 VM_PAGE_OBJECT_BUSY_ASSERT(m);
1168 VM_OBJECT_ASSERT_LOCKED(m->object);
1171 if ((m->oflags & VPO_UNMANAGED) != 0 || !moea_initialized) {
1172 pvo_head = &moea_pvo_kunmanaged;
1173 zone = moea_upvo_zone;
1176 pvo_head = vm_page_to_pvoh(m);
1177 zone = moea_mpvo_zone;
1178 pvo_flags = PVO_MANAGED;
1181 pte_lo = moea_calc_wimg(VM_PAGE_TO_PHYS(m), pmap_page_get_memattr(m));
1183 if (prot & VM_PROT_WRITE) {
1185 if (pmap_bootstrapped &&
1186 (m->oflags & VPO_UNMANAGED) == 0)
1187 vm_page_aflag_set(m, PGA_WRITEABLE);
1191 if ((flags & PMAP_ENTER_WIRED) != 0)
1192 pvo_flags |= PVO_WIRED;
1194 error = moea_pvo_enter(pmap, zone, pvo_head, va, VM_PAGE_TO_PHYS(m),
1198 * Flush the real page from the instruction cache. This has be done
1199 * for all user mappings to prevent information leakage via the
1200 * instruction cache. moea_pvo_enter() returns ENOENT for the first
1201 * mapping for a page.
1203 if (pmap != kernel_pmap && error == ENOENT &&
1204 (pte_lo & (PTE_I | PTE_G)) == 0)
1205 moea_syncicache(VM_PAGE_TO_PHYS(m), PAGE_SIZE);
1211 * Maps a sequence of resident pages belonging to the same object.
1212 * The sequence begins with the given page m_start. This page is
1213 * mapped at the given virtual address start. Each subsequent page is
1214 * mapped at a virtual address that is offset from start by the same
1215 * amount as the page is offset from m_start within the object. The
1216 * last page in the sequence is the page with the largest offset from
1217 * m_start that can be mapped at a virtual address less than the given
1218 * virtual address end. Not every virtual page between start and end
1219 * is mapped; only those for which a resident page exists with the
1220 * corresponding offset from m_start are mapped.
1223 moea_enter_object(pmap_t pm, vm_offset_t start, vm_offset_t end,
1224 vm_page_t m_start, vm_prot_t prot)
1227 vm_pindex_t diff, psize;
1229 VM_OBJECT_ASSERT_LOCKED(m_start->object);
1231 psize = atop(end - start);
1233 rw_wlock(&pvh_global_lock);
1235 while (m != NULL && (diff = m->pindex - m_start->pindex) < psize) {
1236 moea_enter_locked(pm, start + ptoa(diff), m, prot &
1237 (VM_PROT_READ | VM_PROT_EXECUTE), PMAP_ENTER_QUICK_LOCKED,
1239 m = TAILQ_NEXT(m, listq);
1241 rw_wunlock(&pvh_global_lock);
1246 moea_enter_quick(pmap_t pm, vm_offset_t va, vm_page_t m,
1250 rw_wlock(&pvh_global_lock);
1252 moea_enter_locked(pm, va, m, prot & (VM_PROT_READ | VM_PROT_EXECUTE),
1253 PMAP_ENTER_QUICK_LOCKED, 0);
1254 rw_wunlock(&pvh_global_lock);
1259 moea_extract(pmap_t pm, vm_offset_t va)
1261 struct pvo_entry *pvo;
1265 pvo = moea_pvo_find_va(pm, va & ~ADDR_POFF, NULL);
1269 pa = (pvo->pvo_pte.pte.pte_lo & PTE_RPGN) | (va & ADDR_POFF);
1275 * Atomically extract and hold the physical page with the given
1276 * pmap and virtual address pair if that mapping permits the given
1280 moea_extract_and_hold(pmap_t pmap, vm_offset_t va, vm_prot_t prot)
1282 struct pvo_entry *pvo;
1287 pvo = moea_pvo_find_va(pmap, va & ~ADDR_POFF, NULL);
1288 if (pvo != NULL && (pvo->pvo_pte.pte.pte_hi & PTE_VALID) &&
1289 ((pvo->pvo_pte.pte.pte_lo & PTE_PP) == PTE_RW ||
1290 (prot & VM_PROT_WRITE) == 0)) {
1291 m = PHYS_TO_VM_PAGE(pvo->pvo_pte.pte.pte_lo & PTE_RPGN);
1292 if (!vm_page_wire_mapped(m))
1303 moea_upvo_zone = uma_zcreate("UPVO entry", sizeof (struct pvo_entry),
1304 NULL, NULL, NULL, NULL, UMA_ALIGN_PTR,
1305 UMA_ZONE_VM | UMA_ZONE_NOFREE);
1306 moea_mpvo_zone = uma_zcreate("MPVO entry", sizeof(struct pvo_entry),
1307 NULL, NULL, NULL, NULL, UMA_ALIGN_PTR,
1308 UMA_ZONE_VM | UMA_ZONE_NOFREE);
1309 moea_initialized = TRUE;
1313 moea_is_referenced(vm_page_t m)
1317 KASSERT((m->oflags & VPO_UNMANAGED) == 0,
1318 ("moea_is_referenced: page %p is not managed", m));
1319 rw_wlock(&pvh_global_lock);
1320 rv = moea_query_bit(m, PTE_REF);
1321 rw_wunlock(&pvh_global_lock);
1326 moea_is_modified(vm_page_t m)
1330 KASSERT((m->oflags & VPO_UNMANAGED) == 0,
1331 ("moea_is_modified: page %p is not managed", m));
1334 * If the page is not busied then this check is racy.
1336 if (!pmap_page_is_write_mapped(m))
1339 rw_wlock(&pvh_global_lock);
1340 rv = moea_query_bit(m, PTE_CHG);
1341 rw_wunlock(&pvh_global_lock);
1346 moea_is_prefaultable(pmap_t pmap, vm_offset_t va)
1348 struct pvo_entry *pvo;
1352 pvo = moea_pvo_find_va(pmap, va & ~ADDR_POFF, NULL);
1353 rv = pvo == NULL || (pvo->pvo_pte.pte.pte_hi & PTE_VALID) == 0;
1359 moea_clear_modify(vm_page_t m)
1362 KASSERT((m->oflags & VPO_UNMANAGED) == 0,
1363 ("moea_clear_modify: page %p is not managed", m));
1364 vm_page_assert_busied(m);
1366 if (!pmap_page_is_write_mapped(m))
1368 rw_wlock(&pvh_global_lock);
1369 moea_clear_bit(m, PTE_CHG);
1370 rw_wunlock(&pvh_global_lock);
1374 * Clear the write and modified bits in each of the given page's mappings.
1377 moea_remove_write(vm_page_t m)
1379 struct pvo_entry *pvo;
1384 KASSERT((m->oflags & VPO_UNMANAGED) == 0,
1385 ("moea_remove_write: page %p is not managed", m));
1386 vm_page_assert_busied(m);
1388 if (!pmap_page_is_write_mapped(m))
1390 rw_wlock(&pvh_global_lock);
1391 lo = moea_attr_fetch(m);
1393 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) {
1394 pmap = pvo->pvo_pmap;
1396 if ((pvo->pvo_pte.pte.pte_lo & PTE_PP) != PTE_BR) {
1397 pt = moea_pvo_to_pte(pvo, -1);
1398 pvo->pvo_pte.pte.pte_lo &= ~PTE_PP;
1399 pvo->pvo_pte.pte.pte_lo |= PTE_BR;
1401 moea_pte_synch(pt, &pvo->pvo_pte.pte);
1402 lo |= pvo->pvo_pte.pte.pte_lo;
1403 pvo->pvo_pte.pte.pte_lo &= ~PTE_CHG;
1404 moea_pte_change(pt, &pvo->pvo_pte.pte,
1406 mtx_unlock(&moea_table_mutex);
1411 if ((lo & PTE_CHG) != 0) {
1412 moea_attr_clear(m, PTE_CHG);
1415 vm_page_aflag_clear(m, PGA_WRITEABLE);
1416 rw_wunlock(&pvh_global_lock);
1420 * moea_ts_referenced:
1422 * Return a count of reference bits for a page, clearing those bits.
1423 * It is not necessary for every reference bit to be cleared, but it
1424 * is necessary that 0 only be returned when there are truly no
1425 * reference bits set.
1427 * XXX: The exact number of bits to check and clear is a matter that
1428 * should be tested and standardized at some point in the future for
1429 * optimal aging of shared pages.
1432 moea_ts_referenced(vm_page_t m)
1436 KASSERT((m->oflags & VPO_UNMANAGED) == 0,
1437 ("moea_ts_referenced: page %p is not managed", m));
1438 rw_wlock(&pvh_global_lock);
1439 count = moea_clear_bit(m, PTE_REF);
1440 rw_wunlock(&pvh_global_lock);
1445 * Modify the WIMG settings of all mappings for a page.
1448 moea_page_set_memattr(vm_page_t m, vm_memattr_t ma)
1450 struct pvo_entry *pvo;
1451 struct pvo_head *pvo_head;
1456 if ((m->oflags & VPO_UNMANAGED) != 0) {
1457 m->md.mdpg_cache_attrs = ma;
1461 rw_wlock(&pvh_global_lock);
1462 pvo_head = vm_page_to_pvoh(m);
1463 lo = moea_calc_wimg(VM_PAGE_TO_PHYS(m), ma);
1465 LIST_FOREACH(pvo, pvo_head, pvo_vlink) {
1466 pmap = pvo->pvo_pmap;
1468 pt = moea_pvo_to_pte(pvo, -1);
1469 pvo->pvo_pte.pte.pte_lo &= ~PTE_WIMG;
1470 pvo->pvo_pte.pte.pte_lo |= lo;
1472 moea_pte_change(pt, &pvo->pvo_pte.pte,
1474 if (pvo->pvo_pmap == kernel_pmap)
1477 mtx_unlock(&moea_table_mutex);
1480 m->md.mdpg_cache_attrs = ma;
1481 rw_wunlock(&pvh_global_lock);
1485 * Map a wired page into kernel virtual address space.
1488 moea_kenter(vm_offset_t va, vm_paddr_t pa)
1491 moea_kenter_attr(va, pa, VM_MEMATTR_DEFAULT);
1495 moea_kenter_attr(vm_offset_t va, vm_paddr_t pa, vm_memattr_t ma)
1501 if (va < VM_MIN_KERNEL_ADDRESS)
1502 panic("moea_kenter: attempt to enter non-kernel address %#x",
1506 pte_lo = moea_calc_wimg(pa, ma);
1508 PMAP_LOCK(kernel_pmap);
1509 error = moea_pvo_enter(kernel_pmap, moea_upvo_zone,
1510 &moea_pvo_kunmanaged, va, pa, pte_lo, PVO_WIRED);
1512 if (error != 0 && error != ENOENT)
1513 panic("moea_kenter: failed to enter va %#x pa %#x: %d", va,
1516 PMAP_UNLOCK(kernel_pmap);
1520 * Extract the physical page address associated with the given kernel virtual
1524 moea_kextract(vm_offset_t va)
1526 struct pvo_entry *pvo;
1530 * Allow direct mappings on 32-bit OEA
1532 if (va < VM_MIN_KERNEL_ADDRESS) {
1536 PMAP_LOCK(kernel_pmap);
1537 pvo = moea_pvo_find_va(kernel_pmap, va & ~ADDR_POFF, NULL);
1538 KASSERT(pvo != NULL, ("moea_kextract: no addr found"));
1539 pa = (pvo->pvo_pte.pte.pte_lo & PTE_RPGN) | (va & ADDR_POFF);
1540 PMAP_UNLOCK(kernel_pmap);
1545 * Remove a wired page from kernel virtual address space.
1548 moea_kremove(vm_offset_t va)
1551 moea_remove(kernel_pmap, va, va + PAGE_SIZE);
1555 * Provide a kernel pointer corresponding to a given userland pointer.
1556 * The returned pointer is valid until the next time this function is
1557 * called in this thread. This is used internally in copyin/copyout.
1560 moea_map_user_ptr(pmap_t pm, volatile const void *uaddr,
1561 void **kaddr, size_t ulen, size_t *klen)
1566 *kaddr = (char *)USER_ADDR + ((uintptr_t)uaddr & ~SEGMENT_MASK);
1567 l = ((char *)USER_ADDR + SEGMENT_LENGTH) - (char *)(*kaddr);
1575 vsid = va_to_vsid(pm, (vm_offset_t)uaddr);
1577 /* Mark segment no-execute */
1580 /* If we have already set this VSID, we can just return */
1581 if (curthread->td_pcb->pcb_cpu.aim.usr_vsid == vsid)
1584 __asm __volatile("isync");
1585 curthread->td_pcb->pcb_cpu.aim.usr_segm =
1586 (uintptr_t)uaddr >> ADDR_SR_SHFT;
1587 curthread->td_pcb->pcb_cpu.aim.usr_vsid = vsid;
1588 __asm __volatile("mtsr %0,%1; isync" :: "n"(USER_SR), "r"(vsid));
1594 * Figure out where a given kernel pointer (usually in a fault) points
1595 * to from the VM's perspective, potentially remapping into userland's
1599 moea_decode_kernel_ptr(vm_offset_t addr, int *is_user,
1600 vm_offset_t *decoded_addr)
1602 vm_offset_t user_sr;
1604 if ((addr >> ADDR_SR_SHFT) == (USER_ADDR >> ADDR_SR_SHFT)) {
1605 user_sr = curthread->td_pcb->pcb_cpu.aim.usr_segm;
1606 addr &= ADDR_PIDX | ADDR_POFF;
1607 addr |= user_sr << ADDR_SR_SHFT;
1608 *decoded_addr = addr;
1611 *decoded_addr = addr;
1619 * Map a range of physical addresses into kernel virtual address space.
1621 * The value passed in *virt is a suggested virtual address for the mapping.
1622 * Architectures which can support a direct-mapped physical to virtual region
1623 * can return the appropriate address within that region, leaving '*virt'
1624 * unchanged. We cannot and therefore do not; *virt is updated with the
1625 * first usable address after the mapped region.
1628 moea_map(vm_offset_t *virt, vm_paddr_t pa_start,
1629 vm_paddr_t pa_end, int prot)
1631 vm_offset_t sva, va;
1635 for (; pa_start < pa_end; pa_start += PAGE_SIZE, va += PAGE_SIZE)
1636 moea_kenter(va, pa_start);
1642 * Returns true if the pmap's pv is one of the first
1643 * 16 pvs linked to from this page. This count may
1644 * be changed upwards or downwards in the future; it
1645 * is only necessary that true be returned for a small
1646 * subset of pmaps for proper page aging.
1649 moea_page_exists_quick(pmap_t pmap, vm_page_t m)
1652 struct pvo_entry *pvo;
1655 KASSERT((m->oflags & VPO_UNMANAGED) == 0,
1656 ("moea_page_exists_quick: page %p is not managed", m));
1659 rw_wlock(&pvh_global_lock);
1660 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) {
1661 if (pvo->pvo_pmap == pmap) {
1668 rw_wunlock(&pvh_global_lock);
1673 moea_page_init(vm_page_t m)
1676 m->md.mdpg_attrs = 0;
1677 m->md.mdpg_cache_attrs = VM_MEMATTR_DEFAULT;
1678 LIST_INIT(&m->md.mdpg_pvoh);
1682 * Return the number of managed mappings to the given physical page
1686 moea_page_wired_mappings(vm_page_t m)
1688 struct pvo_entry *pvo;
1692 if ((m->oflags & VPO_UNMANAGED) != 0)
1694 rw_wlock(&pvh_global_lock);
1695 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink)
1696 if ((pvo->pvo_vaddr & PVO_WIRED) != 0)
1698 rw_wunlock(&pvh_global_lock);
1702 static u_int moea_vsidcontext;
1705 moea_pinit(pmap_t pmap)
1710 RB_INIT(&pmap->pmap_pvo);
1713 __asm __volatile("mftb %0" : "=r"(entropy));
1715 if ((pmap->pmap_phys = (pmap_t)moea_kextract((vm_offset_t)pmap))
1717 pmap->pmap_phys = pmap;
1721 mtx_lock(&moea_vsid_mutex);
1723 * Allocate some segment registers for this pmap.
1725 for (i = 0; i < NPMAPS; i += VSID_NBPW) {
1729 * Create a new value by mutiplying by a prime and adding in
1730 * entropy from the timebase register. This is to make the
1731 * VSID more random so that the PT hash function collides
1732 * less often. (Note that the prime casues gcc to do shifts
1733 * instead of a multiply.)
1735 moea_vsidcontext = (moea_vsidcontext * 0x1105) + entropy;
1736 hash = moea_vsidcontext & (NPMAPS - 1);
1737 if (hash == 0) /* 0 is special, avoid it */
1740 mask = 1 << (hash & (VSID_NBPW - 1));
1741 hash = (moea_vsidcontext & 0xfffff);
1742 if (moea_vsid_bitmap[n] & mask) { /* collision? */
1743 /* anything free in this bucket? */
1744 if (moea_vsid_bitmap[n] == 0xffffffff) {
1745 entropy = (moea_vsidcontext >> 20);
1748 i = ffs(~moea_vsid_bitmap[n]) - 1;
1750 hash &= rounddown2(0xfffff, VSID_NBPW);
1753 KASSERT(!(moea_vsid_bitmap[n] & mask),
1754 ("Allocating in-use VSID group %#x\n", hash));
1755 moea_vsid_bitmap[n] |= mask;
1756 for (i = 0; i < 16; i++)
1757 pmap->pm_sr[i] = VSID_MAKE(i, hash);
1758 mtx_unlock(&moea_vsid_mutex);
1762 mtx_unlock(&moea_vsid_mutex);
1763 panic("moea_pinit: out of segments");
1767 * Initialize the pmap associated with process 0.
1770 moea_pinit0(pmap_t pm)
1775 bzero(&pm->pm_stats, sizeof(pm->pm_stats));
1779 * Set the physical protection on the specified range of this map as requested.
1782 moea_protect(pmap_t pm, vm_offset_t sva, vm_offset_t eva,
1785 struct pvo_entry *pvo, *tpvo, key;
1788 KASSERT(pm == &curproc->p_vmspace->vm_pmap || pm == kernel_pmap,
1789 ("moea_protect: non current pmap"));
1791 if ((prot & VM_PROT_READ) == VM_PROT_NONE) {
1792 moea_remove(pm, sva, eva);
1796 rw_wlock(&pvh_global_lock);
1798 key.pvo_vaddr = sva;
1799 for (pvo = RB_NFIND(pvo_tree, &pm->pmap_pvo, &key);
1800 pvo != NULL && PVO_VADDR(pvo) < eva; pvo = tpvo) {
1801 tpvo = RB_NEXT(pvo_tree, &pm->pmap_pvo, pvo);
1804 * Grab the PTE pointer before we diddle with the cached PTE
1807 pt = moea_pvo_to_pte(pvo, -1);
1809 * Change the protection of the page.
1811 pvo->pvo_pte.pte.pte_lo &= ~PTE_PP;
1812 pvo->pvo_pte.pte.pte_lo |= PTE_BR;
1815 * If the PVO is in the page table, update that pte as well.
1818 moea_pte_change(pt, &pvo->pvo_pte.pte, pvo->pvo_vaddr);
1819 mtx_unlock(&moea_table_mutex);
1822 rw_wunlock(&pvh_global_lock);
1827 * Map a list of wired pages into kernel virtual address space. This is
1828 * intended for temporary mappings which do not need page modification or
1829 * references recorded. Existing mappings in the region are overwritten.
1832 moea_qenter(vm_offset_t sva, vm_page_t *m, int count)
1837 while (count-- > 0) {
1838 moea_kenter(va, VM_PAGE_TO_PHYS(*m));
1845 * Remove page mappings from kernel virtual address space. Intended for
1846 * temporary mappings entered by moea_qenter.
1849 moea_qremove(vm_offset_t sva, int count)
1854 while (count-- > 0) {
1861 moea_release(pmap_t pmap)
1866 * Free segment register's VSID
1868 if (pmap->pm_sr[0] == 0)
1869 panic("moea_release");
1871 mtx_lock(&moea_vsid_mutex);
1872 idx = VSID_TO_HASH(pmap->pm_sr[0]) & (NPMAPS-1);
1873 mask = 1 << (idx % VSID_NBPW);
1875 moea_vsid_bitmap[idx] &= ~mask;
1876 mtx_unlock(&moea_vsid_mutex);
1880 * Remove the given range of addresses from the specified map.
1883 moea_remove(pmap_t pm, vm_offset_t sva, vm_offset_t eva)
1885 struct pvo_entry *pvo, *tpvo, key;
1887 rw_wlock(&pvh_global_lock);
1889 key.pvo_vaddr = sva;
1890 for (pvo = RB_NFIND(pvo_tree, &pm->pmap_pvo, &key);
1891 pvo != NULL && PVO_VADDR(pvo) < eva; pvo = tpvo) {
1892 tpvo = RB_NEXT(pvo_tree, &pm->pmap_pvo, pvo);
1893 moea_pvo_remove(pvo, -1);
1896 rw_wunlock(&pvh_global_lock);
1900 * Remove physical page from all pmaps in which it resides. moea_pvo_remove()
1901 * will reflect changes in pte's back to the vm_page.
1904 moea_remove_all(vm_page_t m)
1906 struct pvo_head *pvo_head;
1907 struct pvo_entry *pvo, *next_pvo;
1910 rw_wlock(&pvh_global_lock);
1911 pvo_head = vm_page_to_pvoh(m);
1912 for (pvo = LIST_FIRST(pvo_head); pvo != NULL; pvo = next_pvo) {
1913 next_pvo = LIST_NEXT(pvo, pvo_vlink);
1915 pmap = pvo->pvo_pmap;
1917 moea_pvo_remove(pvo, -1);
1920 if ((m->a.flags & PGA_WRITEABLE) && moea_query_bit(m, PTE_CHG)) {
1921 moea_attr_clear(m, PTE_CHG);
1924 vm_page_aflag_clear(m, PGA_WRITEABLE);
1925 rw_wunlock(&pvh_global_lock);
1929 * Allocate a physical page of memory directly from the phys_avail map.
1930 * Can only be called from moea_bootstrap before avail start and end are
1934 moea_bootstrap_alloc(vm_size_t size, u_int align)
1939 size = round_page(size);
1940 for (i = 0; phys_avail[i + 1] != 0; i += 2) {
1942 s = roundup2(phys_avail[i], align);
1947 if (s < phys_avail[i] || e > phys_avail[i + 1])
1950 if (s == phys_avail[i]) {
1951 phys_avail[i] += size;
1952 } else if (e == phys_avail[i + 1]) {
1953 phys_avail[i + 1] -= size;
1955 for (j = phys_avail_count * 2; j > i; j -= 2) {
1956 phys_avail[j] = phys_avail[j - 2];
1957 phys_avail[j + 1] = phys_avail[j - 1];
1960 phys_avail[i + 3] = phys_avail[i + 1];
1961 phys_avail[i + 1] = s;
1962 phys_avail[i + 2] = e;
1968 panic("moea_bootstrap_alloc: could not allocate memory");
1972 moea_syncicache(vm_paddr_t pa, vm_size_t len)
1974 __syncicache((void *)pa, len);
1978 moea_pvo_enter(pmap_t pm, uma_zone_t zone, struct pvo_head *pvo_head,
1979 vm_offset_t va, vm_paddr_t pa, u_int pte_lo, int flags)
1981 struct pvo_entry *pvo;
1988 moea_pvo_enter_calls++;
1993 * Compute the PTE Group index.
1996 sr = va_to_sr(pm->pm_sr, va);
1997 ptegidx = va_to_pteg(sr, va);
2000 * Remove any existing mapping for this page. Reuse the pvo entry if
2001 * there is a mapping.
2003 mtx_lock(&moea_table_mutex);
2004 LIST_FOREACH(pvo, &moea_pvo_table[ptegidx], pvo_olink) {
2005 if (pvo->pvo_pmap == pm && PVO_VADDR(pvo) == va) {
2006 if ((pvo->pvo_pte.pte.pte_lo & PTE_RPGN) == pa &&
2007 (pvo->pvo_pte.pte.pte_lo & PTE_PP) ==
2008 (pte_lo & PTE_PP)) {
2010 * The PTE is not changing. Instead, this may
2011 * be a request to change the mapping's wired
2014 mtx_unlock(&moea_table_mutex);
2015 if ((flags & PVO_WIRED) != 0 &&
2016 (pvo->pvo_vaddr & PVO_WIRED) == 0) {
2017 pvo->pvo_vaddr |= PVO_WIRED;
2018 pm->pm_stats.wired_count++;
2019 } else if ((flags & PVO_WIRED) == 0 &&
2020 (pvo->pvo_vaddr & PVO_WIRED) != 0) {
2021 pvo->pvo_vaddr &= ~PVO_WIRED;
2022 pm->pm_stats.wired_count--;
2026 moea_pvo_remove(pvo, -1);
2032 * If we aren't overwriting a mapping, try to allocate.
2034 if (moea_initialized) {
2035 pvo = uma_zalloc(zone, M_NOWAIT);
2037 if (moea_bpvo_pool_index >= BPVO_POOL_SIZE) {
2038 panic("moea_enter: bpvo pool exhausted, %d, %d, %d",
2039 moea_bpvo_pool_index, BPVO_POOL_SIZE,
2040 BPVO_POOL_SIZE * sizeof(struct pvo_entry));
2042 pvo = &moea_bpvo_pool[moea_bpvo_pool_index];
2043 moea_bpvo_pool_index++;
2048 mtx_unlock(&moea_table_mutex);
2053 pvo->pvo_vaddr = va;
2055 LIST_INSERT_HEAD(&moea_pvo_table[ptegidx], pvo, pvo_olink);
2056 pvo->pvo_vaddr &= ~ADDR_POFF;
2057 if (flags & PVO_WIRED)
2058 pvo->pvo_vaddr |= PVO_WIRED;
2059 if (pvo_head != &moea_pvo_kunmanaged)
2060 pvo->pvo_vaddr |= PVO_MANAGED;
2062 pvo->pvo_vaddr |= PVO_BOOTSTRAP;
2064 moea_pte_create(&pvo->pvo_pte.pte, sr, va, pa | pte_lo);
2069 RB_INSERT(pvo_tree, &pm->pmap_pvo, pvo);
2072 * Remember if the list was empty and therefore will be the first
2075 if (LIST_FIRST(pvo_head) == NULL)
2077 LIST_INSERT_HEAD(pvo_head, pvo, pvo_vlink);
2079 if (pvo->pvo_vaddr & PVO_WIRED)
2080 pm->pm_stats.wired_count++;
2081 pm->pm_stats.resident_count++;
2083 i = moea_pte_insert(ptegidx, &pvo->pvo_pte.pte);
2084 KASSERT(i < 8, ("Invalid PTE index"));
2086 PVO_PTEGIDX_SET(pvo, i);
2088 panic("moea_pvo_enter: overflow");
2089 moea_pte_overflow++;
2091 mtx_unlock(&moea_table_mutex);
2093 return (first ? ENOENT : 0);
2097 moea_pvo_remove(struct pvo_entry *pvo, int pteidx)
2102 * If there is an active pte entry, we need to deactivate it (and
2103 * save the ref & cfg bits).
2105 pt = moea_pvo_to_pte(pvo, pteidx);
2107 moea_pte_unset(pt, &pvo->pvo_pte.pte, pvo->pvo_vaddr);
2108 mtx_unlock(&moea_table_mutex);
2109 PVO_PTEGIDX_CLR(pvo);
2111 moea_pte_overflow--;
2115 * Update our statistics.
2117 pvo->pvo_pmap->pm_stats.resident_count--;
2118 if (pvo->pvo_vaddr & PVO_WIRED)
2119 pvo->pvo_pmap->pm_stats.wired_count--;
2122 * Remove this PVO from the PV and pmap lists.
2124 LIST_REMOVE(pvo, pvo_vlink);
2125 RB_REMOVE(pvo_tree, &pvo->pvo_pmap->pmap_pvo, pvo);
2128 * Save the REF/CHG bits into their cache if the page is managed.
2129 * Clear PGA_WRITEABLE if all mappings of the page have been removed.
2131 if ((pvo->pvo_vaddr & PVO_MANAGED) == PVO_MANAGED) {
2134 pg = PHYS_TO_VM_PAGE(pvo->pvo_pte.pte.pte_lo & PTE_RPGN);
2136 moea_attr_save(pg, pvo->pvo_pte.pte.pte_lo &
2137 (PTE_REF | PTE_CHG));
2138 if (LIST_EMPTY(&pg->md.mdpg_pvoh))
2139 vm_page_aflag_clear(pg, PGA_WRITEABLE);
2144 * Remove this from the overflow list and return it to the pool
2145 * if we aren't going to reuse it.
2147 LIST_REMOVE(pvo, pvo_olink);
2148 if (!(pvo->pvo_vaddr & PVO_BOOTSTRAP))
2149 uma_zfree(pvo->pvo_vaddr & PVO_MANAGED ? moea_mpvo_zone :
2150 moea_upvo_zone, pvo);
2152 moea_pvo_remove_calls++;
2156 moea_pvo_pte_index(const struct pvo_entry *pvo, int ptegidx)
2161 * We can find the actual pte entry without searching by grabbing
2162 * the PTEG index from 3 unused bits in pte_lo[11:9] and by
2163 * noticing the HID bit.
2165 pteidx = ptegidx * 8 + PVO_PTEGIDX_GET(pvo);
2166 if (pvo->pvo_pte.pte.pte_hi & PTE_HID)
2167 pteidx ^= moea_pteg_mask * 8;
2172 static struct pvo_entry *
2173 moea_pvo_find_va(pmap_t pm, vm_offset_t va, int *pteidx_p)
2175 struct pvo_entry *pvo;
2180 sr = va_to_sr(pm->pm_sr, va);
2181 ptegidx = va_to_pteg(sr, va);
2183 mtx_lock(&moea_table_mutex);
2184 LIST_FOREACH(pvo, &moea_pvo_table[ptegidx], pvo_olink) {
2185 if (pvo->pvo_pmap == pm && PVO_VADDR(pvo) == va) {
2187 *pteidx_p = moea_pvo_pte_index(pvo, ptegidx);
2191 mtx_unlock(&moea_table_mutex);
2197 moea_pvo_to_pte(const struct pvo_entry *pvo, int pteidx)
2202 * If we haven't been supplied the ptegidx, calculate it.
2208 sr = va_to_sr(pvo->pvo_pmap->pm_sr, pvo->pvo_vaddr);
2209 ptegidx = va_to_pteg(sr, pvo->pvo_vaddr);
2210 pteidx = moea_pvo_pte_index(pvo, ptegidx);
2213 pt = &moea_pteg_table[pteidx >> 3].pt[pteidx & 7];
2214 mtx_lock(&moea_table_mutex);
2216 if ((pvo->pvo_pte.pte.pte_hi & PTE_VALID) && !PVO_PTEGIDX_ISSET(pvo)) {
2217 panic("moea_pvo_to_pte: pvo %p has valid pte in pvo but no "
2218 "valid pte index", pvo);
2221 if ((pvo->pvo_pte.pte.pte_hi & PTE_VALID) == 0 && PVO_PTEGIDX_ISSET(pvo)) {
2222 panic("moea_pvo_to_pte: pvo %p has valid pte index in pvo "
2223 "pvo but no valid pte", pvo);
2226 if ((pt->pte_hi ^ (pvo->pvo_pte.pte.pte_hi & ~PTE_VALID)) == PTE_VALID) {
2227 if ((pvo->pvo_pte.pte.pte_hi & PTE_VALID) == 0) {
2228 panic("moea_pvo_to_pte: pvo %p has valid pte in "
2229 "moea_pteg_table %p but invalid in pvo", pvo, pt);
2232 if (((pt->pte_lo ^ pvo->pvo_pte.pte.pte_lo) & ~(PTE_CHG|PTE_REF))
2234 panic("moea_pvo_to_pte: pvo %p pte does not match "
2235 "pte %p in moea_pteg_table", pvo, pt);
2238 mtx_assert(&moea_table_mutex, MA_OWNED);
2242 if (pvo->pvo_pte.pte.pte_hi & PTE_VALID) {
2243 panic("moea_pvo_to_pte: pvo %p has invalid pte %p in "
2244 "moea_pteg_table but valid in pvo: %8x, %8x", pvo, pt, pvo->pvo_pte.pte.pte_hi, pt->pte_hi);
2247 mtx_unlock(&moea_table_mutex);
2252 * XXX: THIS STUFF SHOULD BE IN pte.c?
2255 moea_pte_spill(vm_offset_t addr)
2257 struct pvo_entry *source_pvo, *victim_pvo;
2258 struct pvo_entry *pvo;
2267 ptegidx = va_to_pteg(sr, addr);
2270 * Have to substitute some entry. Use the primary hash for this.
2271 * Use low bits of timebase as random generator.
2273 pteg = &moea_pteg_table[ptegidx];
2274 mtx_lock(&moea_table_mutex);
2275 __asm __volatile("mftb %0" : "=r"(i));
2281 LIST_FOREACH(pvo, &moea_pvo_table[ptegidx], pvo_olink) {
2283 * We need to find a pvo entry for this address.
2285 if (source_pvo == NULL &&
2286 moea_pte_match(&pvo->pvo_pte.pte, sr, addr,
2287 pvo->pvo_pte.pte.pte_hi & PTE_HID)) {
2289 * Now found an entry to be spilled into the pteg.
2290 * The PTE is now valid, so we know it's active.
2292 j = moea_pte_insert(ptegidx, &pvo->pvo_pte.pte);
2295 PVO_PTEGIDX_SET(pvo, j);
2296 moea_pte_overflow--;
2297 mtx_unlock(&moea_table_mutex);
2303 if (victim_pvo != NULL)
2308 * We also need the pvo entry of the victim we are replacing
2309 * so save the R & C bits of the PTE.
2311 if ((pt->pte_hi & PTE_HID) == 0 && victim_pvo == NULL &&
2312 moea_pte_compare(pt, &pvo->pvo_pte.pte)) {
2314 if (source_pvo != NULL)
2319 if (source_pvo == NULL) {
2320 mtx_unlock(&moea_table_mutex);
2324 if (victim_pvo == NULL) {
2325 if ((pt->pte_hi & PTE_HID) == 0)
2326 panic("moea_pte_spill: victim p-pte (%p) has no pvo"
2330 * If this is a secondary PTE, we need to search it's primary
2331 * pvo bucket for the matching PVO.
2333 LIST_FOREACH(pvo, &moea_pvo_table[ptegidx ^ moea_pteg_mask],
2336 * We also need the pvo entry of the victim we are
2337 * replacing so save the R & C bits of the PTE.
2339 if (moea_pte_compare(pt, &pvo->pvo_pte.pte)) {
2345 if (victim_pvo == NULL)
2346 panic("moea_pte_spill: victim s-pte (%p) has no pvo"
2351 * We are invalidating the TLB entry for the EA we are replacing even
2352 * though it's valid. If we don't, we lose any ref/chg bit changes
2353 * contained in the TLB entry.
2355 source_pvo->pvo_pte.pte.pte_hi &= ~PTE_HID;
2357 moea_pte_unset(pt, &victim_pvo->pvo_pte.pte, victim_pvo->pvo_vaddr);
2358 moea_pte_set(pt, &source_pvo->pvo_pte.pte);
2360 PVO_PTEGIDX_CLR(victim_pvo);
2361 PVO_PTEGIDX_SET(source_pvo, i);
2362 moea_pte_replacements++;
2364 mtx_unlock(&moea_table_mutex);
2368 static __inline struct pvo_entry *
2369 moea_pte_spillable_ident(u_int ptegidx)
2372 struct pvo_entry *pvo_walk, *pvo = NULL;
2374 LIST_FOREACH(pvo_walk, &moea_pvo_table[ptegidx], pvo_olink) {
2375 if (pvo_walk->pvo_vaddr & PVO_WIRED)
2378 if (!(pvo_walk->pvo_pte.pte.pte_hi & PTE_VALID))
2381 pt = moea_pvo_to_pte(pvo_walk, -1);
2388 mtx_unlock(&moea_table_mutex);
2389 if (!(pt->pte_lo & PTE_REF))
2397 moea_pte_insert(u_int ptegidx, struct pte *pvo_pt)
2400 struct pvo_entry *victim_pvo;
2403 u_int pteg_bkpidx = ptegidx;
2405 mtx_assert(&moea_table_mutex, MA_OWNED);
2408 * First try primary hash.
2410 for (pt = moea_pteg_table[ptegidx].pt, i = 0; i < 8; i++, pt++) {
2411 if ((pt->pte_hi & PTE_VALID) == 0) {
2412 pvo_pt->pte_hi &= ~PTE_HID;
2413 moea_pte_set(pt, pvo_pt);
2419 * Now try secondary hash.
2421 ptegidx ^= moea_pteg_mask;
2423 for (pt = moea_pteg_table[ptegidx].pt, i = 0; i < 8; i++, pt++) {
2424 if ((pt->pte_hi & PTE_VALID) == 0) {
2425 pvo_pt->pte_hi |= PTE_HID;
2426 moea_pte_set(pt, pvo_pt);
2431 /* Try again, but this time try to force a PTE out. */
2432 ptegidx = pteg_bkpidx;
2434 victim_pvo = moea_pte_spillable_ident(ptegidx);
2435 if (victim_pvo == NULL) {
2436 ptegidx ^= moea_pteg_mask;
2437 victim_pvo = moea_pte_spillable_ident(ptegidx);
2440 if (victim_pvo == NULL) {
2441 panic("moea_pte_insert: overflow");
2445 victim_idx = moea_pvo_pte_index(victim_pvo, ptegidx);
2447 if (pteg_bkpidx == ptegidx)
2448 pvo_pt->pte_hi &= ~PTE_HID;
2450 pvo_pt->pte_hi |= PTE_HID;
2453 * Synchronize the sacrifice PTE with its PVO, then mark both
2454 * invalid. The PVO will be reused when/if the VM system comes
2455 * here after a fault.
2457 pt = &moea_pteg_table[victim_idx >> 3].pt[victim_idx & 7];
2459 if (pt->pte_hi != victim_pvo->pvo_pte.pte.pte_hi)
2460 panic("Victim PVO doesn't match PTE! PVO: %8x, PTE: %8x", victim_pvo->pvo_pte.pte.pte_hi, pt->pte_hi);
2465 moea_pte_unset(pt, &victim_pvo->pvo_pte.pte, victim_pvo->pvo_vaddr);
2466 PVO_PTEGIDX_CLR(victim_pvo);
2467 moea_pte_overflow++;
2468 moea_pte_set(pt, pvo_pt);
2470 return (victim_idx & 7);
2474 moea_query_bit(vm_page_t m, int ptebit)
2476 struct pvo_entry *pvo;
2479 rw_assert(&pvh_global_lock, RA_WLOCKED);
2480 if (moea_attr_fetch(m) & ptebit)
2483 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) {
2486 * See if we saved the bit off. If so, cache it and return
2489 if (pvo->pvo_pte.pte.pte_lo & ptebit) {
2490 moea_attr_save(m, ptebit);
2496 * No luck, now go through the hard part of looking at the PTEs
2497 * themselves. Sync so that any pending REF/CHG bits are flushed to
2501 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) {
2504 * See if this pvo has a valid PTE. if so, fetch the
2505 * REF/CHG bits from the valid PTE. If the appropriate
2506 * ptebit is set, cache it and return success.
2508 pt = moea_pvo_to_pte(pvo, -1);
2510 moea_pte_synch(pt, &pvo->pvo_pte.pte);
2511 mtx_unlock(&moea_table_mutex);
2512 if (pvo->pvo_pte.pte.pte_lo & ptebit) {
2513 moea_attr_save(m, ptebit);
2523 moea_clear_bit(vm_page_t m, int ptebit)
2526 struct pvo_entry *pvo;
2529 rw_assert(&pvh_global_lock, RA_WLOCKED);
2532 * Clear the cached value.
2534 moea_attr_clear(m, ptebit);
2537 * Sync so that any pending REF/CHG bits are flushed to the PTEs (so
2538 * we can reset the right ones). note that since the pvo entries and
2539 * list heads are accessed via BAT0 and are never placed in the page
2540 * table, we don't have to worry about further accesses setting the
2546 * For each pvo entry, clear the pvo's ptebit. If this pvo has a
2547 * valid pte clear the ptebit from the valid pte.
2550 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) {
2551 pt = moea_pvo_to_pte(pvo, -1);
2553 moea_pte_synch(pt, &pvo->pvo_pte.pte);
2554 if (pvo->pvo_pte.pte.pte_lo & ptebit) {
2556 moea_pte_clear(pt, PVO_VADDR(pvo), ptebit);
2558 mtx_unlock(&moea_table_mutex);
2560 pvo->pvo_pte.pte.pte_lo &= ~ptebit;
2567 * Return true if the physical range is encompassed by the battable[idx]
2570 moea_bat_mapped(int idx, vm_paddr_t pa, vm_size_t size)
2578 * Return immediately if not a valid mapping
2580 if (!(battable[idx].batu & BAT_Vs))
2584 * The BAT entry must be cache-inhibited, guarded, and r/w
2585 * so it can function as an i/o page
2587 prot = battable[idx].batl & (BAT_I|BAT_G|BAT_PP_RW);
2588 if (prot != (BAT_I|BAT_G|BAT_PP_RW))
2592 * The address should be within the BAT range. Assume that the
2593 * start address in the BAT has the correct alignment (thus
2594 * not requiring masking)
2596 start = battable[idx].batl & BAT_PBS;
2597 bat_ble = (battable[idx].batu & ~(BAT_EBS)) | 0x03;
2598 end = start | (bat_ble << 15) | 0x7fff;
2600 if ((pa < start) || ((pa + size) > end))
2607 moea_dev_direct_mapped(vm_paddr_t pa, vm_size_t size)
2612 * This currently does not work for entries that
2613 * overlap 256M BAT segments.
2616 for(i = 0; i < 16; i++)
2617 if (moea_bat_mapped(i, pa, size) == 0)
2624 * Map a set of physical memory pages into the kernel virtual
2625 * address space. Return a pointer to where it is mapped. This
2626 * routine is intended to be used for mapping device memory,
2630 moea_mapdev(vm_paddr_t pa, vm_size_t size)
2633 return (moea_mapdev_attr(pa, size, VM_MEMATTR_DEFAULT));
2637 moea_mapdev_attr(vm_paddr_t pa, vm_size_t size, vm_memattr_t ma)
2639 vm_offset_t va, tmpva, ppa, offset;
2642 ppa = trunc_page(pa);
2643 offset = pa & PAGE_MASK;
2644 size = roundup(offset + size, PAGE_SIZE);
2647 * If the physical address lies within a valid BAT table entry,
2648 * return the 1:1 mapping. This currently doesn't work
2649 * for regions that overlap 256M BAT segments.
2651 for (i = 0; i < 16; i++) {
2652 if (moea_bat_mapped(i, pa, size) == 0)
2653 return ((void *) pa);
2656 va = kva_alloc(size);
2658 panic("moea_mapdev: Couldn't alloc kernel virtual memory");
2660 for (tmpva = va; size > 0;) {
2661 moea_kenter_attr(tmpva, ppa, ma);
2668 return ((void *)(va + offset));
2672 moea_unmapdev(vm_offset_t va, vm_size_t size)
2674 vm_offset_t base, offset;
2677 * If this is outside kernel virtual space, then it's a
2678 * battable entry and doesn't require unmapping
2680 if ((va >= VM_MIN_KERNEL_ADDRESS) && (va <= virtual_end)) {
2681 base = trunc_page(va);
2682 offset = va & PAGE_MASK;
2683 size = roundup(offset + size, PAGE_SIZE);
2684 moea_qremove(base, atop(size));
2685 kva_free(base, size);
2690 moea_sync_icache(pmap_t pm, vm_offset_t va, vm_size_t sz)
2692 struct pvo_entry *pvo;
2699 lim = round_page(va + 1);
2700 len = MIN(lim - va, sz);
2701 pvo = moea_pvo_find_va(pm, va & ~ADDR_POFF, NULL);
2703 pa = (pvo->pvo_pte.pte.pte_lo & PTE_RPGN) |
2705 moea_syncicache(pa, len);
2714 moea_dumpsys_map(vm_paddr_t pa, size_t sz, void **va)
2720 extern struct dump_pa dump_map[PHYS_AVAIL_SZ + 1];
2725 struct pvo_entry *pvo;
2730 /* Initialize phys. segments for dumpsys(). */
2731 memset(&dump_map, 0, sizeof(dump_map));
2732 mem_regions(&pregions, &pregions_sz, ®ions, ®ions_sz);
2733 for (i = 0; i < pregions_sz; i++) {
2734 dump_map[i].pa_start = pregions[i].mr_start;
2735 dump_map[i].pa_size = pregions[i].mr_size;
2740 /* Virtual segments for minidumps: */
2741 memset(&dump_map, 0, sizeof(dump_map));
2743 /* 1st: kernel .data and .bss. */
2744 dump_map[0].pa_start = trunc_page((uintptr_t)_etext);
2745 dump_map[0].pa_size =
2746 round_page((uintptr_t)_end) - dump_map[0].pa_start;
2748 /* 2nd: msgbuf and tables (see pmap_bootstrap()). */
2749 dump_map[1].pa_start = (vm_paddr_t)msgbufp->msg_ptr;
2750 dump_map[1].pa_size = round_page(msgbufp->msg_size);
2752 /* 3rd: kernel VM. */
2753 va = dump_map[1].pa_start + dump_map[1].pa_size;
2754 /* Find start of next chunk (from va). */
2755 while (va < virtual_end) {
2756 /* Don't dump the buffer cache. */
2757 if (va >= kmi.buffer_sva && va < kmi.buffer_eva) {
2758 va = kmi.buffer_eva;
2761 pvo = moea_pvo_find_va(kernel_pmap, va & ~ADDR_POFF, NULL);
2762 if (pvo != NULL && (pvo->pvo_pte.pte.pte_hi & PTE_VALID))
2766 if (va < virtual_end) {
2767 dump_map[2].pa_start = va;
2769 /* Find last page in chunk. */
2770 while (va < virtual_end) {
2771 /* Don't run into the buffer cache. */
2772 if (va == kmi.buffer_sva)
2774 pvo = moea_pvo_find_va(kernel_pmap, va & ~ADDR_POFF,
2777 !(pvo->pvo_pte.pte.pte_hi & PTE_VALID))
2781 dump_map[2].pa_size = va - dump_map[2].pa_start;