2 * Copyright (c) 2001 The NetBSD Foundation, Inc.
5 * This code is derived from software contributed to The NetBSD Foundation
6 * by Matt Thomas <matt@3am-software.com> of Allegro Networks, Inc.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 * POSSIBILITY OF SUCH DAMAGE.
30 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
31 * Copyright (C) 1995, 1996 TooLs GmbH.
32 * All rights reserved.
34 * Redistribution and use in source and binary forms, with or without
35 * modification, are permitted provided that the following conditions
37 * 1. Redistributions of source code must retain the above copyright
38 * notice, this list of conditions and the following disclaimer.
39 * 2. Redistributions in binary form must reproduce the above copyright
40 * notice, this list of conditions and the following disclaimer in the
41 * documentation and/or other materials provided with the distribution.
42 * 3. All advertising materials mentioning features or use of this software
43 * must display the following acknowledgement:
44 * This product includes software developed by TooLs GmbH.
45 * 4. The name of TooLs GmbH may not be used to endorse or promote products
46 * derived from this software without specific prior written permission.
48 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
49 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
50 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
51 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
52 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
53 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
54 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
55 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
56 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
57 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
59 * $NetBSD: pmap.c,v 1.28 2000/03/26 20:42:36 kleink Exp $
62 * Copyright (C) 2001 Benno Rice.
63 * All rights reserved.
65 * Redistribution and use in source and binary forms, with or without
66 * modification, are permitted provided that the following conditions
68 * 1. Redistributions of source code must retain the above copyright
69 * notice, this list of conditions and the following disclaimer.
70 * 2. Redistributions in binary form must reproduce the above copyright
71 * notice, this list of conditions and the following disclaimer in the
72 * documentation and/or other materials provided with the distribution.
74 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
75 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
76 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
77 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
78 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
79 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
80 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
81 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
82 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
83 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
86 #include <sys/cdefs.h>
87 __FBSDID("$FreeBSD$");
90 * Manages physical address maps.
92 * In addition to hardware address maps, this module is called upon to
93 * provide software-use-only maps which may or may not be stored in the
94 * same form as hardware maps. These pseudo-maps are used to store
95 * intermediate results from copy operations to and from address spaces.
97 * Since the information managed by this module is also stored by the
98 * logical address mapping module, this module may throw away valid virtual
99 * to physical mappings at almost any time. However, invalidations of
100 * mappings must be done as requested.
102 * In order to cope with hardware architectures which make virtual to
103 * physical map invalidates expensive, this module may delay invalidate
104 * reduced protection operations until such time as they are actually
105 * necessary. This module is given full information as to which processors
106 * are currently using which maps, and to when physical maps must be made
110 #include "opt_compat.h"
111 #include "opt_kstack_pages.h"
113 #include <sys/param.h>
114 #include <sys/kernel.h>
115 #include <sys/queue.h>
116 #include <sys/cpuset.h>
118 #include <sys/lock.h>
119 #include <sys/msgbuf.h>
120 #include <sys/mutex.h>
121 #include <sys/proc.h>
122 #include <sys/rwlock.h>
123 #include <sys/sched.h>
124 #include <sys/sysctl.h>
125 #include <sys/systm.h>
126 #include <sys/vmmeter.h>
130 #include <dev/ofw/openfirm.h>
133 #include <vm/vm_param.h>
134 #include <vm/vm_kern.h>
135 #include <vm/vm_page.h>
136 #include <vm/vm_map.h>
137 #include <vm/vm_object.h>
138 #include <vm/vm_extern.h>
139 #include <vm/vm_pageout.h>
140 #include <vm/vm_pager.h>
143 #include <machine/_inttypes.h>
144 #include <machine/cpu.h>
145 #include <machine/platform.h>
146 #include <machine/frame.h>
147 #include <machine/md_var.h>
148 #include <machine/psl.h>
149 #include <machine/bat.h>
150 #include <machine/hid.h>
151 #include <machine/pte.h>
152 #include <machine/sr.h>
153 #include <machine/trap.h>
154 #include <machine/mmuvar.h>
156 #include "mmu_oea64.h"
158 #include "moea64_if.h"
160 void moea64_release_vsid(uint64_t vsid);
161 uintptr_t moea64_get_unique_vsid(void);
163 #define DISABLE_TRANS(msr) msr = mfmsr(); mtmsr(msr & ~PSL_DR)
164 #define ENABLE_TRANS(msr) mtmsr(msr)
166 #define VSID_MAKE(sr, hash) ((sr) | (((hash) & 0xfffff) << 4))
167 #define VSID_TO_HASH(vsid) (((vsid) >> 4) & 0xfffff)
168 #define VSID_HASH_MASK 0x0000007fffffffffULL
172 * -- Read lock: if no modifications are being made to either the PVO lists
173 * or page table or if any modifications being made result in internal
174 * changes (e.g. wiring, protection) such that the existence of the PVOs
175 * is unchanged and they remain associated with the same pmap (in which
176 * case the changes should be protected by the pmap lock)
177 * -- Write lock: required if PTEs/PVOs are being inserted or removed.
180 #define LOCK_TABLE_RD() rw_rlock(&moea64_table_lock)
181 #define UNLOCK_TABLE_RD() rw_runlock(&moea64_table_lock)
182 #define LOCK_TABLE_WR() rw_wlock(&moea64_table_lock)
183 #define UNLOCK_TABLE_WR() rw_wunlock(&moea64_table_lock)
194 * Map of physical memory regions.
196 static struct mem_region *regions;
197 static struct mem_region *pregions;
198 static u_int phys_avail_count;
199 static int regions_sz, pregions_sz;
201 extern void bs_remap_earlyboot(void);
204 * Lock for the pteg and pvo tables.
206 struct rwlock moea64_table_lock;
207 struct mtx moea64_slb_mutex;
212 u_int moea64_pteg_count;
213 u_int moea64_pteg_mask;
218 struct pvo_head *moea64_pvo_table; /* pvo entries by pteg index */
219 struct pvo_head moea64_pvo_kunmanaged = /* list of unmanaged pages */
220 LIST_HEAD_INITIALIZER(moea64_pvo_kunmanaged);
222 uma_zone_t moea64_upvo_zone; /* zone for pvo entries for unmanaged pages */
223 uma_zone_t moea64_mpvo_zone; /* zone for pvo entries for managed pages */
225 #define BPVO_POOL_SIZE 327680
226 static struct pvo_entry *moea64_bpvo_pool;
227 static int moea64_bpvo_pool_index = 0;
229 #define VSID_NBPW (sizeof(u_int32_t) * 8)
231 #define NVSIDS (NPMAPS * 16)
232 #define VSID_HASHMASK 0xffffffffUL
234 #define NVSIDS NPMAPS
235 #define VSID_HASHMASK 0xfffffUL
237 static u_int moea64_vsid_bitmap[NVSIDS / VSID_NBPW];
239 static boolean_t moea64_initialized = FALSE;
244 u_int moea64_pte_valid = 0;
245 u_int moea64_pte_overflow = 0;
246 u_int moea64_pvo_entries = 0;
247 u_int moea64_pvo_enter_calls = 0;
248 u_int moea64_pvo_remove_calls = 0;
249 SYSCTL_INT(_machdep, OID_AUTO, moea64_pte_valid, CTLFLAG_RD,
250 &moea64_pte_valid, 0, "");
251 SYSCTL_INT(_machdep, OID_AUTO, moea64_pte_overflow, CTLFLAG_RD,
252 &moea64_pte_overflow, 0, "");
253 SYSCTL_INT(_machdep, OID_AUTO, moea64_pvo_entries, CTLFLAG_RD,
254 &moea64_pvo_entries, 0, "");
255 SYSCTL_INT(_machdep, OID_AUTO, moea64_pvo_enter_calls, CTLFLAG_RD,
256 &moea64_pvo_enter_calls, 0, "");
257 SYSCTL_INT(_machdep, OID_AUTO, moea64_pvo_remove_calls, CTLFLAG_RD,
258 &moea64_pvo_remove_calls, 0, "");
260 vm_offset_t moea64_scratchpage_va[2];
261 struct pvo_entry *moea64_scratchpage_pvo[2];
262 uintptr_t moea64_scratchpage_pte[2];
263 struct mtx moea64_scratchpage_mtx;
265 uint64_t moea64_large_page_mask = 0;
266 int moea64_large_page_size = 0;
267 int moea64_large_page_shift = 0;
272 static int moea64_pvo_enter(mmu_t, pmap_t, uma_zone_t, struct pvo_head *,
273 vm_offset_t, vm_offset_t, uint64_t, int);
274 static void moea64_pvo_remove(mmu_t, struct pvo_entry *);
275 static struct pvo_entry *moea64_pvo_find_va(pmap_t, vm_offset_t);
280 static boolean_t moea64_query_bit(mmu_t, vm_page_t, u_int64_t);
281 static u_int moea64_clear_bit(mmu_t, vm_page_t, u_int64_t);
282 static void moea64_kremove(mmu_t, vm_offset_t);
283 static void moea64_syncicache(mmu_t, pmap_t pmap, vm_offset_t va,
284 vm_offset_t pa, vm_size_t sz);
287 * Kernel MMU interface
289 void moea64_change_wiring(mmu_t, pmap_t, vm_offset_t, boolean_t);
290 void moea64_clear_modify(mmu_t, vm_page_t);
291 void moea64_clear_reference(mmu_t, vm_page_t);
292 void moea64_copy_page(mmu_t, vm_page_t, vm_page_t);
293 void moea64_copy_pages(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset,
294 vm_page_t *mb, vm_offset_t b_offset, int xfersize);
295 void moea64_enter(mmu_t, pmap_t, vm_offset_t, vm_page_t, vm_prot_t, boolean_t);
296 void moea64_enter_object(mmu_t, pmap_t, vm_offset_t, vm_offset_t, vm_page_t,
298 void moea64_enter_quick(mmu_t, pmap_t, vm_offset_t, vm_page_t, vm_prot_t);
299 vm_paddr_t moea64_extract(mmu_t, pmap_t, vm_offset_t);
300 vm_page_t moea64_extract_and_hold(mmu_t, pmap_t, vm_offset_t, vm_prot_t);
301 void moea64_init(mmu_t);
302 boolean_t moea64_is_modified(mmu_t, vm_page_t);
303 boolean_t moea64_is_prefaultable(mmu_t, pmap_t, vm_offset_t);
304 boolean_t moea64_is_referenced(mmu_t, vm_page_t);
305 boolean_t moea64_ts_referenced(mmu_t, vm_page_t);
306 vm_offset_t moea64_map(mmu_t, vm_offset_t *, vm_offset_t, vm_offset_t, int);
307 boolean_t moea64_page_exists_quick(mmu_t, pmap_t, vm_page_t);
308 int moea64_page_wired_mappings(mmu_t, vm_page_t);
309 void moea64_pinit(mmu_t, pmap_t);
310 void moea64_pinit0(mmu_t, pmap_t);
311 void moea64_protect(mmu_t, pmap_t, vm_offset_t, vm_offset_t, vm_prot_t);
312 void moea64_qenter(mmu_t, vm_offset_t, vm_page_t *, int);
313 void moea64_qremove(mmu_t, vm_offset_t, int);
314 void moea64_release(mmu_t, pmap_t);
315 void moea64_remove(mmu_t, pmap_t, vm_offset_t, vm_offset_t);
316 void moea64_remove_pages(mmu_t, pmap_t);
317 void moea64_remove_all(mmu_t, vm_page_t);
318 void moea64_remove_write(mmu_t, vm_page_t);
319 void moea64_zero_page(mmu_t, vm_page_t);
320 void moea64_zero_page_area(mmu_t, vm_page_t, int, int);
321 void moea64_zero_page_idle(mmu_t, vm_page_t);
322 void moea64_activate(mmu_t, struct thread *);
323 void moea64_deactivate(mmu_t, struct thread *);
324 void *moea64_mapdev(mmu_t, vm_offset_t, vm_size_t);
325 void *moea64_mapdev_attr(mmu_t, vm_offset_t, vm_size_t, vm_memattr_t);
326 void moea64_unmapdev(mmu_t, vm_offset_t, vm_size_t);
327 vm_offset_t moea64_kextract(mmu_t, vm_offset_t);
328 void moea64_page_set_memattr(mmu_t, vm_page_t m, vm_memattr_t ma);
329 void moea64_kenter_attr(mmu_t, vm_offset_t, vm_offset_t, vm_memattr_t ma);
330 void moea64_kenter(mmu_t, vm_offset_t, vm_offset_t);
331 boolean_t moea64_dev_direct_mapped(mmu_t, vm_offset_t, vm_size_t);
332 static void moea64_sync_icache(mmu_t, pmap_t, vm_offset_t, vm_size_t);
334 static mmu_method_t moea64_methods[] = {
335 MMUMETHOD(mmu_change_wiring, moea64_change_wiring),
336 MMUMETHOD(mmu_clear_modify, moea64_clear_modify),
337 MMUMETHOD(mmu_clear_reference, moea64_clear_reference),
338 MMUMETHOD(mmu_copy_page, moea64_copy_page),
339 MMUMETHOD(mmu_copy_pages, moea64_copy_pages),
340 MMUMETHOD(mmu_enter, moea64_enter),
341 MMUMETHOD(mmu_enter_object, moea64_enter_object),
342 MMUMETHOD(mmu_enter_quick, moea64_enter_quick),
343 MMUMETHOD(mmu_extract, moea64_extract),
344 MMUMETHOD(mmu_extract_and_hold, moea64_extract_and_hold),
345 MMUMETHOD(mmu_init, moea64_init),
346 MMUMETHOD(mmu_is_modified, moea64_is_modified),
347 MMUMETHOD(mmu_is_prefaultable, moea64_is_prefaultable),
348 MMUMETHOD(mmu_is_referenced, moea64_is_referenced),
349 MMUMETHOD(mmu_ts_referenced, moea64_ts_referenced),
350 MMUMETHOD(mmu_map, moea64_map),
351 MMUMETHOD(mmu_page_exists_quick,moea64_page_exists_quick),
352 MMUMETHOD(mmu_page_wired_mappings,moea64_page_wired_mappings),
353 MMUMETHOD(mmu_pinit, moea64_pinit),
354 MMUMETHOD(mmu_pinit0, moea64_pinit0),
355 MMUMETHOD(mmu_protect, moea64_protect),
356 MMUMETHOD(mmu_qenter, moea64_qenter),
357 MMUMETHOD(mmu_qremove, moea64_qremove),
358 MMUMETHOD(mmu_release, moea64_release),
359 MMUMETHOD(mmu_remove, moea64_remove),
360 MMUMETHOD(mmu_remove_pages, moea64_remove_pages),
361 MMUMETHOD(mmu_remove_all, moea64_remove_all),
362 MMUMETHOD(mmu_remove_write, moea64_remove_write),
363 MMUMETHOD(mmu_sync_icache, moea64_sync_icache),
364 MMUMETHOD(mmu_zero_page, moea64_zero_page),
365 MMUMETHOD(mmu_zero_page_area, moea64_zero_page_area),
366 MMUMETHOD(mmu_zero_page_idle, moea64_zero_page_idle),
367 MMUMETHOD(mmu_activate, moea64_activate),
368 MMUMETHOD(mmu_deactivate, moea64_deactivate),
369 MMUMETHOD(mmu_page_set_memattr, moea64_page_set_memattr),
371 /* Internal interfaces */
372 MMUMETHOD(mmu_mapdev, moea64_mapdev),
373 MMUMETHOD(mmu_mapdev_attr, moea64_mapdev_attr),
374 MMUMETHOD(mmu_unmapdev, moea64_unmapdev),
375 MMUMETHOD(mmu_kextract, moea64_kextract),
376 MMUMETHOD(mmu_kenter, moea64_kenter),
377 MMUMETHOD(mmu_kenter_attr, moea64_kenter_attr),
378 MMUMETHOD(mmu_dev_direct_mapped,moea64_dev_direct_mapped),
383 MMU_DEF(oea64_mmu, "mmu_oea64_base", moea64_methods, 0);
385 static __inline u_int
386 va_to_pteg(uint64_t vsid, vm_offset_t addr, int large)
391 shift = large ? moea64_large_page_shift : ADDR_PIDX_SHFT;
392 hash = (vsid & VSID_HASH_MASK) ^ (((uint64_t)addr & ADDR_PIDX) >>
394 return (hash & moea64_pteg_mask);
397 static __inline struct pvo_head *
398 vm_page_to_pvoh(vm_page_t m)
401 return (&m->md.mdpg_pvoh);
405 moea64_pte_create(struct lpte *pt, uint64_t vsid, vm_offset_t va,
406 uint64_t pte_lo, int flags)
410 * Construct a PTE. Default to IMB initially. Valid bit only gets
411 * set when the real pte is set in memory.
413 * Note: Don't set the valid bit for correct operation of tlb update.
415 pt->pte_hi = (vsid << LPTE_VSID_SHIFT) |
416 (((uint64_t)(va & ADDR_PIDX) >> ADDR_API_SHFT64) & LPTE_API);
418 if (flags & PVO_LARGE)
419 pt->pte_hi |= LPTE_BIG;
424 static __inline uint64_t
425 moea64_calc_wimg(vm_offset_t pa, vm_memattr_t ma)
430 if (ma != VM_MEMATTR_DEFAULT) {
432 case VM_MEMATTR_UNCACHEABLE:
433 return (LPTE_I | LPTE_G);
434 case VM_MEMATTR_WRITE_COMBINING:
435 case VM_MEMATTR_WRITE_BACK:
436 case VM_MEMATTR_PREFETCHABLE:
438 case VM_MEMATTR_WRITE_THROUGH:
439 return (LPTE_W | LPTE_M);
444 * Assume the page is cache inhibited and access is guarded unless
445 * it's in our available memory array.
447 pte_lo = LPTE_I | LPTE_G;
448 for (i = 0; i < pregions_sz; i++) {
449 if ((pa >= pregions[i].mr_start) &&
450 (pa < (pregions[i].mr_start + pregions[i].mr_size))) {
451 pte_lo &= ~(LPTE_I | LPTE_G);
461 * Quick sort callout for comparing memory regions.
463 static int om_cmp(const void *a, const void *b);
466 om_cmp(const void *a, const void *b)
468 const struct ofw_map *mapa;
469 const struct ofw_map *mapb;
473 if (mapa->om_pa_hi < mapb->om_pa_hi)
475 else if (mapa->om_pa_hi > mapb->om_pa_hi)
477 else if (mapa->om_pa_lo < mapb->om_pa_lo)
479 else if (mapa->om_pa_lo > mapb->om_pa_lo)
486 moea64_add_ofw_mappings(mmu_t mmup, phandle_t mmu, size_t sz)
488 struct ofw_map translations[sz/sizeof(struct ofw_map)];
494 bzero(translations, sz);
495 if (OF_getprop(mmu, "translations", translations, sz) == -1)
496 panic("moea64_bootstrap: can't get ofw translations");
498 CTR0(KTR_PMAP, "moea64_add_ofw_mappings: translations");
499 sz /= sizeof(*translations);
500 qsort(translations, sz, sizeof (*translations), om_cmp);
502 for (i = 0; i < sz; i++) {
503 CTR3(KTR_PMAP, "translation: pa=%#x va=%#x len=%#x",
504 (uint32_t)(translations[i].om_pa_lo), translations[i].om_va,
505 translations[i].om_len);
507 if (translations[i].om_pa_lo % PAGE_SIZE)
508 panic("OFW translation not page-aligned!");
510 pa_base = translations[i].om_pa_lo;
513 pa_base += (vm_offset_t)translations[i].om_pa_hi << 32;
515 if (translations[i].om_pa_hi)
516 panic("OFW translations above 32-bit boundary!");
519 /* Now enter the pages for this mapping */
522 for (off = 0; off < translations[i].om_len; off += PAGE_SIZE) {
523 if (moea64_pvo_find_va(kernel_pmap,
524 translations[i].om_va + off) != NULL)
527 moea64_kenter(mmup, translations[i].om_va + off,
536 moea64_probe_large_page(void)
538 uint16_t pvr = mfpvr() >> 16;
544 powerpc_sync(); isync();
545 mtspr(SPR_HID4, mfspr(SPR_HID4) & ~HID4_970_DISABLE_LG_PG);
546 powerpc_sync(); isync();
550 moea64_large_page_size = 0x1000000; /* 16 MB */
551 moea64_large_page_shift = 24;
554 moea64_large_page_size = 0;
557 moea64_large_page_mask = moea64_large_page_size - 1;
561 moea64_bootstrap_slb_prefault(vm_offset_t va, int large)
568 cache = PCPU_GET(slb);
569 esid = va >> ADDR_SR_SHFT;
570 slbe = (esid << SLBE_ESID_SHIFT) | SLBE_VALID;
572 for (i = 0; i < 64; i++) {
573 if (cache[i].slbe == (slbe | i))
578 entry.slbv = KERNEL_VSID(esid) << SLBV_VSID_SHIFT;
580 entry.slbv |= SLBV_L;
582 slb_insert_kernel(entry.slbe, entry.slbv);
587 moea64_setup_direct_map(mmu_t mmup, vm_offset_t kernelstart,
588 vm_offset_t kernelend)
592 vm_offset_t size, off;
596 if (moea64_large_page_size == 0)
602 PMAP_LOCK(kernel_pmap);
603 for (i = 0; i < pregions_sz; i++) {
604 for (pa = pregions[i].mr_start; pa < pregions[i].mr_start +
605 pregions[i].mr_size; pa += moea64_large_page_size) {
609 * Set memory access as guarded if prefetch within
610 * the page could exit the available physmem area.
612 if (pa & moea64_large_page_mask) {
613 pa &= moea64_large_page_mask;
616 if (pa + moea64_large_page_size >
617 pregions[i].mr_start + pregions[i].mr_size)
620 moea64_pvo_enter(mmup, kernel_pmap, moea64_upvo_zone,
621 &moea64_pvo_kunmanaged, pa, pa,
622 pte_lo, PVO_WIRED | PVO_LARGE);
625 PMAP_UNLOCK(kernel_pmap);
628 size = sizeof(struct pvo_head) * moea64_pteg_count;
629 off = (vm_offset_t)(moea64_pvo_table);
630 for (pa = off; pa < off + size; pa += PAGE_SIZE)
631 moea64_kenter(mmup, pa, pa);
632 size = BPVO_POOL_SIZE*sizeof(struct pvo_entry);
633 off = (vm_offset_t)(moea64_bpvo_pool);
634 for (pa = off; pa < off + size; pa += PAGE_SIZE)
635 moea64_kenter(mmup, pa, pa);
638 * Map certain important things, like ourselves.
640 * NOTE: We do not map the exception vector space. That code is
641 * used only in real mode, and leaving it unmapped allows us to
642 * catch NULL pointer deferences, instead of making NULL a valid
646 for (pa = kernelstart & ~PAGE_MASK; pa < kernelend;
648 moea64_kenter(mmup, pa, pa);
653 * Allow user to override unmapped_buf_allowed for testing.
654 * XXXKIB Only direct map implementation was tested.
656 if (!TUNABLE_INT_FETCH("vfs.unmapped_buf_allowed",
657 &unmapped_buf_allowed))
658 unmapped_buf_allowed = hw_direct_map;
662 moea64_early_bootstrap(mmu_t mmup, vm_offset_t kernelstart, vm_offset_t kernelend)
665 vm_size_t physsz, hwphyssz;
667 #ifndef __powerpc64__
668 /* We don't have a direct map since there is no BAT */
671 /* Make sure battable is zero, since we have no BAT */
672 for (i = 0; i < 16; i++) {
673 battable[i].batu = 0;
674 battable[i].batl = 0;
677 moea64_probe_large_page();
679 /* Use a direct map if we have large page support */
680 if (moea64_large_page_size > 0)
686 /* Get physical memory regions from firmware */
687 mem_regions(&pregions, &pregions_sz, ®ions, ®ions_sz);
688 CTR0(KTR_PMAP, "moea64_bootstrap: physical memory");
690 if (sizeof(phys_avail)/sizeof(phys_avail[0]) < regions_sz)
691 panic("moea64_bootstrap: phys_avail too small");
693 phys_avail_count = 0;
696 TUNABLE_ULONG_FETCH("hw.physmem", (u_long *) &hwphyssz);
697 for (i = 0, j = 0; i < regions_sz; i++, j += 2) {
698 CTR3(KTR_PMAP, "region: %#x - %#x (%#x)", regions[i].mr_start,
699 regions[i].mr_start + regions[i].mr_size,
702 (physsz + regions[i].mr_size) >= hwphyssz) {
703 if (physsz < hwphyssz) {
704 phys_avail[j] = regions[i].mr_start;
705 phys_avail[j + 1] = regions[i].mr_start +
712 phys_avail[j] = regions[i].mr_start;
713 phys_avail[j + 1] = regions[i].mr_start + regions[i].mr_size;
715 physsz += regions[i].mr_size;
718 /* Check for overlap with the kernel and exception vectors */
719 for (j = 0; j < 2*phys_avail_count; j+=2) {
720 if (phys_avail[j] < EXC_LAST)
721 phys_avail[j] += EXC_LAST;
723 if (kernelstart >= phys_avail[j] &&
724 kernelstart < phys_avail[j+1]) {
725 if (kernelend < phys_avail[j+1]) {
726 phys_avail[2*phys_avail_count] =
727 (kernelend & ~PAGE_MASK) + PAGE_SIZE;
728 phys_avail[2*phys_avail_count + 1] =
733 phys_avail[j+1] = kernelstart & ~PAGE_MASK;
736 if (kernelend >= phys_avail[j] &&
737 kernelend < phys_avail[j+1]) {
738 if (kernelstart > phys_avail[j]) {
739 phys_avail[2*phys_avail_count] = phys_avail[j];
740 phys_avail[2*phys_avail_count + 1] =
741 kernelstart & ~PAGE_MASK;
745 phys_avail[j] = (kernelend & ~PAGE_MASK) + PAGE_SIZE;
749 physmem = btoc(physsz);
752 moea64_pteg_count = PTEGCOUNT;
754 moea64_pteg_count = 0x1000;
756 while (moea64_pteg_count < physmem)
757 moea64_pteg_count <<= 1;
759 moea64_pteg_count >>= 1;
760 #endif /* PTEGCOUNT */
764 moea64_mid_bootstrap(mmu_t mmup, vm_offset_t kernelstart, vm_offset_t kernelend)
773 moea64_pteg_mask = moea64_pteg_count - 1;
776 * Allocate pv/overflow lists.
778 size = sizeof(struct pvo_head) * moea64_pteg_count;
780 moea64_pvo_table = (struct pvo_head *)moea64_bootstrap_alloc(size,
782 CTR1(KTR_PMAP, "moea64_bootstrap: PVO table at %p", moea64_pvo_table);
785 for (i = 0; i < moea64_pteg_count; i++)
786 LIST_INIT(&moea64_pvo_table[i]);
790 * Initialize the lock that synchronizes access to the pteg and pvo
793 rw_init_flags(&moea64_table_lock, "pmap tables", RW_RECURSE);
794 mtx_init(&moea64_slb_mutex, "SLB table", NULL, MTX_DEF);
797 * Initialise the unmanaged pvo pool.
799 moea64_bpvo_pool = (struct pvo_entry *)moea64_bootstrap_alloc(
800 BPVO_POOL_SIZE*sizeof(struct pvo_entry), 0);
801 moea64_bpvo_pool_index = 0;
804 * Make sure kernel vsid is allocated as well as VSID 0.
806 #ifndef __powerpc64__
807 moea64_vsid_bitmap[(KERNEL_VSIDBITS & (NVSIDS - 1)) / VSID_NBPW]
808 |= 1 << (KERNEL_VSIDBITS % VSID_NBPW);
809 moea64_vsid_bitmap[0] |= 1;
813 * Initialize the kernel pmap (which is statically allocated).
816 for (i = 0; i < 64; i++) {
817 pcpup->pc_slb[i].slbv = 0;
818 pcpup->pc_slb[i].slbe = 0;
821 for (i = 0; i < 16; i++)
822 kernel_pmap->pm_sr[i] = EMPTY_SEGMENT + i;
825 kernel_pmap->pmap_phys = kernel_pmap;
826 CPU_FILL(&kernel_pmap->pm_active);
827 LIST_INIT(&kernel_pmap->pmap_pvo);
829 PMAP_LOCK_INIT(kernel_pmap);
832 * Now map in all the other buffers we allocated earlier
835 moea64_setup_direct_map(mmup, kernelstart, kernelend);
839 moea64_late_bootstrap(mmu_t mmup, vm_offset_t kernelstart, vm_offset_t kernelend)
850 * Set up the Open Firmware pmap and add its mappings if not in real
854 chosen = OF_finddevice("/chosen");
855 if (chosen != -1 && OF_getprop(chosen, "mmu", &mmui, 4) != -1) {
856 mmu = OF_instance_to_package(mmui);
857 if (mmu == -1 || (sz = OF_getproplen(mmu, "translations")) == -1)
859 if (sz > 6144 /* tmpstksz - 2 KB headroom */)
860 panic("moea64_bootstrap: too many ofw translations");
863 moea64_add_ofw_mappings(mmup, mmu, sz);
867 * Calculate the last available physical address.
869 for (i = 0; phys_avail[i + 2] != 0; i += 2)
871 Maxmem = powerpc_btop(phys_avail[i + 1]);
874 * Initialize MMU and remap early physical mappings
876 MMU_CPU_BOOTSTRAP(mmup,0);
877 mtmsr(mfmsr() | PSL_DR | PSL_IR);
879 bs_remap_earlyboot();
882 * Set the start and end of kva.
884 virtual_avail = VM_MIN_KERNEL_ADDRESS;
885 virtual_end = VM_MAX_SAFE_KERNEL_ADDRESS;
888 * Map the entire KVA range into the SLB. We must not fault there.
891 for (va = virtual_avail; va < virtual_end; va += SEGMENT_LENGTH)
892 moea64_bootstrap_slb_prefault(va, 0);
896 * Figure out how far we can extend virtual_end into segment 16
897 * without running into existing mappings. Segment 16 is guaranteed
898 * to contain neither RAM nor devices (at least on Apple hardware),
899 * but will generally contain some OFW mappings we should not
903 #ifndef __powerpc64__ /* KVA is in high memory on PPC64 */
904 PMAP_LOCK(kernel_pmap);
905 while (virtual_end < VM_MAX_KERNEL_ADDRESS &&
906 moea64_pvo_find_va(kernel_pmap, virtual_end+1) == NULL)
907 virtual_end += PAGE_SIZE;
908 PMAP_UNLOCK(kernel_pmap);
912 * Allocate a kernel stack with a guard page for thread0 and map it
913 * into the kernel page map.
915 pa = moea64_bootstrap_alloc(KSTACK_PAGES * PAGE_SIZE, PAGE_SIZE);
916 va = virtual_avail + KSTACK_GUARD_PAGES * PAGE_SIZE;
917 virtual_avail = va + KSTACK_PAGES * PAGE_SIZE;
918 CTR2(KTR_PMAP, "moea64_bootstrap: kstack0 at %#x (%#x)", pa, va);
919 thread0.td_kstack = va;
920 thread0.td_kstack_pages = KSTACK_PAGES;
921 for (i = 0; i < KSTACK_PAGES; i++) {
922 moea64_kenter(mmup, va, pa);
928 * Allocate virtual address space for the message buffer.
930 pa = msgbuf_phys = moea64_bootstrap_alloc(msgbufsize, PAGE_SIZE);
931 msgbufp = (struct msgbuf *)virtual_avail;
933 virtual_avail += round_page(msgbufsize);
934 while (va < virtual_avail) {
935 moea64_kenter(mmup, va, pa);
941 * Allocate virtual address space for the dynamic percpu area.
943 pa = moea64_bootstrap_alloc(DPCPU_SIZE, PAGE_SIZE);
944 dpcpu = (void *)virtual_avail;
946 virtual_avail += DPCPU_SIZE;
947 while (va < virtual_avail) {
948 moea64_kenter(mmup, va, pa);
952 dpcpu_init(dpcpu, 0);
955 * Allocate some things for page zeroing. We put this directly
956 * in the page table, marked with LPTE_LOCKED, to avoid any
957 * of the PVO book-keeping or other parts of the VM system
958 * from even knowing that this hack exists.
961 if (!hw_direct_map) {
962 mtx_init(&moea64_scratchpage_mtx, "pvo zero page", NULL,
964 for (i = 0; i < 2; i++) {
965 moea64_scratchpage_va[i] = (virtual_end+1) - PAGE_SIZE;
966 virtual_end -= PAGE_SIZE;
968 moea64_kenter(mmup, moea64_scratchpage_va[i], 0);
970 moea64_scratchpage_pvo[i] = moea64_pvo_find_va(
971 kernel_pmap, (vm_offset_t)moea64_scratchpage_va[i]);
973 moea64_scratchpage_pte[i] = MOEA64_PVO_TO_PTE(
974 mmup, moea64_scratchpage_pvo[i]);
975 moea64_scratchpage_pvo[i]->pvo_pte.lpte.pte_hi
977 MOEA64_PTE_CHANGE(mmup, moea64_scratchpage_pte[i],
978 &moea64_scratchpage_pvo[i]->pvo_pte.lpte,
979 moea64_scratchpage_pvo[i]->pvo_vpn);
986 * Activate a user pmap. The pmap must be activated before its address
987 * space can be accessed in any way.
990 moea64_activate(mmu_t mmu, struct thread *td)
994 pm = &td->td_proc->p_vmspace->vm_pmap;
995 CPU_SET(PCPU_GET(cpuid), &pm->pm_active);
998 PCPU_SET(userslb, pm->pm_slb);
1000 PCPU_SET(curpmap, pm->pmap_phys);
1005 moea64_deactivate(mmu_t mmu, struct thread *td)
1009 pm = &td->td_proc->p_vmspace->vm_pmap;
1010 CPU_CLR(PCPU_GET(cpuid), &pm->pm_active);
1011 #ifdef __powerpc64__
1012 PCPU_SET(userslb, NULL);
1014 PCPU_SET(curpmap, NULL);
1019 moea64_change_wiring(mmu_t mmu, pmap_t pm, vm_offset_t va, boolean_t wired)
1021 struct pvo_entry *pvo;
1028 pvo = moea64_pvo_find_va(pm, va & ~ADDR_POFF);
1031 pt = MOEA64_PVO_TO_PTE(mmu, pvo);
1034 if ((pvo->pvo_vaddr & PVO_WIRED) == 0)
1035 pm->pm_stats.wired_count++;
1036 pvo->pvo_vaddr |= PVO_WIRED;
1037 pvo->pvo_pte.lpte.pte_hi |= LPTE_WIRED;
1039 if ((pvo->pvo_vaddr & PVO_WIRED) != 0)
1040 pm->pm_stats.wired_count--;
1041 pvo->pvo_vaddr &= ~PVO_WIRED;
1042 pvo->pvo_pte.lpte.pte_hi &= ~LPTE_WIRED;
1046 /* Update wiring flag in page table. */
1047 MOEA64_PTE_CHANGE(mmu, pt, &pvo->pvo_pte.lpte,
1051 * If we are wiring the page, and it wasn't in the
1052 * page table before, add it.
1054 vsid = PVO_VSID(pvo);
1055 ptegidx = va_to_pteg(vsid, PVO_VADDR(pvo),
1056 pvo->pvo_vaddr & PVO_LARGE);
1058 i = MOEA64_PTE_INSERT(mmu, ptegidx, &pvo->pvo_pte.lpte);
1061 PVO_PTEGIDX_CLR(pvo);
1062 PVO_PTEGIDX_SET(pvo, i);
1072 * This goes through and sets the physical address of our
1073 * special scratch PTE to the PA we want to zero or copy. Because
1074 * of locking issues (this can get called in pvo_enter() by
1075 * the UMA allocator), we can't use most other utility functions here
1079 void moea64_set_scratchpage_pa(mmu_t mmup, int which, vm_offset_t pa) {
1081 KASSERT(!hw_direct_map, ("Using OEA64 scratchpage with a direct map!"));
1082 mtx_assert(&moea64_scratchpage_mtx, MA_OWNED);
1084 moea64_scratchpage_pvo[which]->pvo_pte.lpte.pte_lo &=
1085 ~(LPTE_WIMG | LPTE_RPGN);
1086 moea64_scratchpage_pvo[which]->pvo_pte.lpte.pte_lo |=
1087 moea64_calc_wimg(pa, VM_MEMATTR_DEFAULT) | (uint64_t)pa;
1088 MOEA64_PTE_CHANGE(mmup, moea64_scratchpage_pte[which],
1089 &moea64_scratchpage_pvo[which]->pvo_pte.lpte,
1090 moea64_scratchpage_pvo[which]->pvo_vpn);
1095 moea64_copy_page(mmu_t mmu, vm_page_t msrc, vm_page_t mdst)
1100 dst = VM_PAGE_TO_PHYS(mdst);
1101 src = VM_PAGE_TO_PHYS(msrc);
1103 if (hw_direct_map) {
1104 bcopy((void *)src, (void *)dst, PAGE_SIZE);
1106 mtx_lock(&moea64_scratchpage_mtx);
1108 moea64_set_scratchpage_pa(mmu, 0, src);
1109 moea64_set_scratchpage_pa(mmu, 1, dst);
1111 bcopy((void *)moea64_scratchpage_va[0],
1112 (void *)moea64_scratchpage_va[1], PAGE_SIZE);
1114 mtx_unlock(&moea64_scratchpage_mtx);
1119 moea64_copy_pages_dmap(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset,
1120 vm_page_t *mb, vm_offset_t b_offset, int xfersize)
1123 vm_offset_t a_pg_offset, b_pg_offset;
1126 while (xfersize > 0) {
1127 a_pg_offset = a_offset & PAGE_MASK;
1128 cnt = min(xfersize, PAGE_SIZE - a_pg_offset);
1129 a_cp = (char *)VM_PAGE_TO_PHYS(ma[a_offset >> PAGE_SHIFT]) +
1131 b_pg_offset = b_offset & PAGE_MASK;
1132 cnt = min(cnt, PAGE_SIZE - b_pg_offset);
1133 b_cp = (char *)VM_PAGE_TO_PHYS(mb[b_offset >> PAGE_SHIFT]) +
1135 bcopy(a_cp, b_cp, cnt);
1143 moea64_copy_pages_nodmap(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset,
1144 vm_page_t *mb, vm_offset_t b_offset, int xfersize)
1147 vm_offset_t a_pg_offset, b_pg_offset;
1150 mtx_lock(&moea64_scratchpage_mtx);
1151 while (xfersize > 0) {
1152 a_pg_offset = a_offset & PAGE_MASK;
1153 cnt = min(xfersize, PAGE_SIZE - a_pg_offset);
1154 moea64_set_scratchpage_pa(mmu, 0,
1155 VM_PAGE_TO_PHYS(ma[a_offset >> PAGE_SHIFT]));
1156 a_cp = (char *)moea64_scratchpage_va[0] + a_pg_offset;
1157 b_pg_offset = b_offset & PAGE_MASK;
1158 cnt = min(cnt, PAGE_SIZE - b_pg_offset);
1159 moea64_set_scratchpage_pa(mmu, 1,
1160 VM_PAGE_TO_PHYS(mb[b_offset >> PAGE_SHIFT]));
1161 b_cp = (char *)moea64_scratchpage_va[1] + b_pg_offset;
1162 bcopy(a_cp, b_cp, cnt);
1167 mtx_unlock(&moea64_scratchpage_mtx);
1171 moea64_copy_pages(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset,
1172 vm_page_t *mb, vm_offset_t b_offset, int xfersize)
1175 if (hw_direct_map) {
1176 moea64_copy_pages_dmap(mmu, ma, a_offset, mb, b_offset,
1179 moea64_copy_pages_nodmap(mmu, ma, a_offset, mb, b_offset,
1185 moea64_zero_page_area(mmu_t mmu, vm_page_t m, int off, int size)
1187 vm_offset_t pa = VM_PAGE_TO_PHYS(m);
1189 if (size + off > PAGE_SIZE)
1190 panic("moea64_zero_page: size + off > PAGE_SIZE");
1192 if (hw_direct_map) {
1193 bzero((caddr_t)pa + off, size);
1195 mtx_lock(&moea64_scratchpage_mtx);
1196 moea64_set_scratchpage_pa(mmu, 0, pa);
1197 bzero((caddr_t)moea64_scratchpage_va[0] + off, size);
1198 mtx_unlock(&moea64_scratchpage_mtx);
1203 * Zero a page of physical memory by temporarily mapping it
1206 moea64_zero_page(mmu_t mmu, vm_page_t m)
1208 vm_offset_t pa = VM_PAGE_TO_PHYS(m);
1209 vm_offset_t va, off;
1211 if (!hw_direct_map) {
1212 mtx_lock(&moea64_scratchpage_mtx);
1214 moea64_set_scratchpage_pa(mmu, 0, pa);
1215 va = moea64_scratchpage_va[0];
1220 for (off = 0; off < PAGE_SIZE; off += cacheline_size)
1221 __asm __volatile("dcbz 0,%0" :: "r"(va + off));
1224 mtx_unlock(&moea64_scratchpage_mtx);
1228 moea64_zero_page_idle(mmu_t mmu, vm_page_t m)
1231 moea64_zero_page(mmu, m);
1235 * Map the given physical page at the specified virtual address in the
1236 * target pmap with the protection requested. If specified the page
1237 * will be wired down.
1241 moea64_enter(mmu_t mmu, pmap_t pmap, vm_offset_t va, vm_page_t m,
1242 vm_prot_t prot, boolean_t wired)
1244 struct pvo_head *pvo_head;
1251 if (!moea64_initialized) {
1252 pvo_head = &moea64_pvo_kunmanaged;
1254 zone = moea64_upvo_zone;
1257 pvo_head = vm_page_to_pvoh(m);
1259 zone = moea64_mpvo_zone;
1260 pvo_flags = PVO_MANAGED;
1263 KASSERT((m->oflags & (VPO_UNMANAGED | VPO_BUSY)) != 0 ||
1264 VM_OBJECT_LOCKED(m->object),
1265 ("moea64_enter: page %p is not busy", m));
1267 /* XXX change the pvo head for fake pages */
1268 if ((m->oflags & VPO_UNMANAGED) != 0) {
1269 pvo_flags &= ~PVO_MANAGED;
1270 pvo_head = &moea64_pvo_kunmanaged;
1271 zone = moea64_upvo_zone;
1274 pte_lo = moea64_calc_wimg(VM_PAGE_TO_PHYS(m), pmap_page_get_memattr(m));
1276 if (prot & VM_PROT_WRITE) {
1278 if (pmap_bootstrapped &&
1279 (m->oflags & VPO_UNMANAGED) == 0)
1280 vm_page_aflag_set(m, PGA_WRITEABLE);
1284 if ((prot & VM_PROT_EXECUTE) == 0)
1285 pte_lo |= LPTE_NOEXEC;
1288 pvo_flags |= PVO_WIRED;
1292 error = moea64_pvo_enter(mmu, pmap, zone, pvo_head, va,
1293 VM_PAGE_TO_PHYS(m), pte_lo, pvo_flags);
1298 * Flush the page from the instruction cache if this page is
1299 * mapped executable and cacheable.
1301 if (pmap != kernel_pmap && !(m->aflags & PGA_EXECUTABLE) &&
1302 (pte_lo & (LPTE_I | LPTE_G | LPTE_NOEXEC)) == 0) {
1303 vm_page_aflag_set(m, PGA_EXECUTABLE);
1304 moea64_syncicache(mmu, pmap, va, VM_PAGE_TO_PHYS(m), PAGE_SIZE);
1309 moea64_syncicache(mmu_t mmu, pmap_t pmap, vm_offset_t va, vm_offset_t pa,
1314 * This is much trickier than on older systems because
1315 * we can't sync the icache on physical addresses directly
1316 * without a direct map. Instead we check a couple of cases
1317 * where the memory is already mapped in and, failing that,
1318 * use the same trick we use for page zeroing to create
1319 * a temporary mapping for this physical address.
1322 if (!pmap_bootstrapped) {
1324 * If PMAP is not bootstrapped, we are likely to be
1327 __syncicache((void *)pa, sz);
1328 } else if (pmap == kernel_pmap) {
1329 __syncicache((void *)va, sz);
1330 } else if (hw_direct_map) {
1331 __syncicache((void *)pa, sz);
1333 /* Use the scratch page to set up a temp mapping */
1335 mtx_lock(&moea64_scratchpage_mtx);
1337 moea64_set_scratchpage_pa(mmu, 1, pa & ~ADDR_POFF);
1338 __syncicache((void *)(moea64_scratchpage_va[1] +
1339 (va & ADDR_POFF)), sz);
1341 mtx_unlock(&moea64_scratchpage_mtx);
1346 * Maps a sequence of resident pages belonging to the same object.
1347 * The sequence begins with the given page m_start. This page is
1348 * mapped at the given virtual address start. Each subsequent page is
1349 * mapped at a virtual address that is offset from start by the same
1350 * amount as the page is offset from m_start within the object. The
1351 * last page in the sequence is the page with the largest offset from
1352 * m_start that can be mapped at a virtual address less than the given
1353 * virtual address end. Not every virtual page between start and end
1354 * is mapped; only those for which a resident page exists with the
1355 * corresponding offset from m_start are mapped.
1358 moea64_enter_object(mmu_t mmu, pmap_t pm, vm_offset_t start, vm_offset_t end,
1359 vm_page_t m_start, vm_prot_t prot)
1362 vm_pindex_t diff, psize;
1364 psize = atop(end - start);
1366 while (m != NULL && (diff = m->pindex - m_start->pindex) < psize) {
1367 moea64_enter(mmu, pm, start + ptoa(diff), m, prot &
1368 (VM_PROT_READ | VM_PROT_EXECUTE), FALSE);
1369 m = TAILQ_NEXT(m, listq);
1374 moea64_enter_quick(mmu_t mmu, pmap_t pm, vm_offset_t va, vm_page_t m,
1378 moea64_enter(mmu, pm, va, m,
1379 prot & (VM_PROT_READ | VM_PROT_EXECUTE), FALSE);
1383 moea64_extract(mmu_t mmu, pmap_t pm, vm_offset_t va)
1385 struct pvo_entry *pvo;
1390 pvo = moea64_pvo_find_va(pm, va);
1394 pa = (pvo->pvo_pte.lpte.pte_lo & LPTE_RPGN) |
1395 (va - PVO_VADDR(pvo));
1402 * Atomically extract and hold the physical page with the given
1403 * pmap and virtual address pair if that mapping permits the given
1407 extern int pa_tryrelock_restart;
1410 vm_page_pa_tryrelock_moea64(pmap_t pmap, vm_paddr_t pa, vm_paddr_t *locked)
1413 * This is a duplicate of vm_page_pa_tryrelock(), but with proper
1414 * handling of the table lock
1421 PA_LOCK_ASSERT(lockpa, MA_OWNED);
1422 if (PA_LOCKPTR(pa) == PA_LOCKPTR(lockpa))
1430 atomic_add_int(&pa_tryrelock_restart, 1);
1438 moea64_extract_and_hold(mmu_t mmu, pmap_t pmap, vm_offset_t va, vm_prot_t prot)
1440 struct pvo_entry *pvo;
1449 pvo = moea64_pvo_find_va(pmap, va & ~ADDR_POFF);
1450 if (pvo != NULL && (pvo->pvo_pte.lpte.pte_hi & LPTE_VALID) &&
1451 ((pvo->pvo_pte.lpte.pte_lo & LPTE_PP) == LPTE_RW ||
1452 (prot & VM_PROT_WRITE) == 0)) {
1453 if (vm_page_pa_tryrelock_moea64(pmap,
1454 pvo->pvo_pte.lpte.pte_lo & LPTE_RPGN, &pa))
1456 m = PHYS_TO_VM_PAGE(pvo->pvo_pte.lpte.pte_lo & LPTE_RPGN);
1465 static mmu_t installed_mmu;
1468 moea64_uma_page_alloc(uma_zone_t zone, int bytes, u_int8_t *flags, int wait)
1471 * This entire routine is a horrible hack to avoid bothering kmem
1472 * for new KVA addresses. Because this can get called from inside
1473 * kmem allocation routines, calling kmem for a new address here
1474 * can lead to multiply locking non-recursive mutexes.
1476 static vm_pindex_t color;
1480 int pflags, needed_lock;
1482 *flags = UMA_SLAB_PRIV;
1483 needed_lock = !PMAP_LOCKED(kernel_pmap);
1485 if ((wait & (M_NOWAIT|M_USE_RESERVE)) == M_NOWAIT)
1486 pflags = VM_ALLOC_INTERRUPT | VM_ALLOC_WIRED;
1488 pflags = VM_ALLOC_SYSTEM | VM_ALLOC_WIRED;
1490 pflags |= VM_ALLOC_ZERO;
1493 m = vm_page_alloc(NULL, color++, pflags | VM_ALLOC_NOOBJ);
1495 if (wait & M_NOWAIT)
1502 va = VM_PAGE_TO_PHYS(m);
1506 PMAP_LOCK(kernel_pmap);
1508 moea64_pvo_enter(installed_mmu, kernel_pmap, moea64_upvo_zone,
1509 &moea64_pvo_kunmanaged, va, VM_PAGE_TO_PHYS(m), LPTE_M,
1510 PVO_WIRED | PVO_BOOTSTRAP);
1513 PMAP_UNLOCK(kernel_pmap);
1516 if ((wait & M_ZERO) && (m->flags & PG_ZERO) == 0)
1517 bzero((void *)va, PAGE_SIZE);
1522 extern int elf32_nxstack;
1525 moea64_init(mmu_t mmu)
1528 CTR0(KTR_PMAP, "moea64_init");
1530 moea64_upvo_zone = uma_zcreate("UPVO entry", sizeof (struct pvo_entry),
1531 NULL, NULL, NULL, NULL, UMA_ALIGN_PTR,
1532 UMA_ZONE_VM | UMA_ZONE_NOFREE);
1533 moea64_mpvo_zone = uma_zcreate("MPVO entry", sizeof(struct pvo_entry),
1534 NULL, NULL, NULL, NULL, UMA_ALIGN_PTR,
1535 UMA_ZONE_VM | UMA_ZONE_NOFREE);
1537 if (!hw_direct_map) {
1538 installed_mmu = mmu;
1539 uma_zone_set_allocf(moea64_upvo_zone,moea64_uma_page_alloc);
1540 uma_zone_set_allocf(moea64_mpvo_zone,moea64_uma_page_alloc);
1543 #ifdef COMPAT_FREEBSD32
1547 moea64_initialized = TRUE;
1551 moea64_is_referenced(mmu_t mmu, vm_page_t m)
1554 KASSERT((m->oflags & VPO_UNMANAGED) == 0,
1555 ("moea64_is_referenced: page %p is not managed", m));
1556 return (moea64_query_bit(mmu, m, PTE_REF));
1560 moea64_is_modified(mmu_t mmu, vm_page_t m)
1563 KASSERT((m->oflags & VPO_UNMANAGED) == 0,
1564 ("moea64_is_modified: page %p is not managed", m));
1567 * If the page is not VPO_BUSY, then PGA_WRITEABLE cannot be
1568 * concurrently set while the object is locked. Thus, if PGA_WRITEABLE
1569 * is clear, no PTEs can have LPTE_CHG set.
1571 VM_OBJECT_LOCK_ASSERT(m->object, MA_OWNED);
1572 if ((m->oflags & VPO_BUSY) == 0 &&
1573 (m->aflags & PGA_WRITEABLE) == 0)
1575 return (moea64_query_bit(mmu, m, LPTE_CHG));
1579 moea64_is_prefaultable(mmu_t mmu, pmap_t pmap, vm_offset_t va)
1581 struct pvo_entry *pvo;
1586 pvo = moea64_pvo_find_va(pmap, va & ~ADDR_POFF);
1587 rv = pvo == NULL || (pvo->pvo_pte.lpte.pte_hi & LPTE_VALID) == 0;
1594 moea64_clear_reference(mmu_t mmu, vm_page_t m)
1597 KASSERT((m->oflags & VPO_UNMANAGED) == 0,
1598 ("moea64_clear_reference: page %p is not managed", m));
1599 moea64_clear_bit(mmu, m, LPTE_REF);
1603 moea64_clear_modify(mmu_t mmu, vm_page_t m)
1606 KASSERT((m->oflags & VPO_UNMANAGED) == 0,
1607 ("moea64_clear_modify: page %p is not managed", m));
1608 VM_OBJECT_LOCK_ASSERT(m->object, MA_OWNED);
1609 KASSERT((m->oflags & VPO_BUSY) == 0,
1610 ("moea64_clear_modify: page %p is busy", m));
1613 * If the page is not PGA_WRITEABLE, then no PTEs can have LPTE_CHG
1614 * set. If the object containing the page is locked and the page is
1615 * not VPO_BUSY, then PGA_WRITEABLE cannot be concurrently set.
1617 if ((m->aflags & PGA_WRITEABLE) == 0)
1619 moea64_clear_bit(mmu, m, LPTE_CHG);
1623 * Clear the write and modified bits in each of the given page's mappings.
1626 moea64_remove_write(mmu_t mmu, vm_page_t m)
1628 struct pvo_entry *pvo;
1633 KASSERT((m->oflags & VPO_UNMANAGED) == 0,
1634 ("moea64_remove_write: page %p is not managed", m));
1637 * If the page is not VPO_BUSY, then PGA_WRITEABLE cannot be set by
1638 * another thread while the object is locked. Thus, if PGA_WRITEABLE
1639 * is clear, no page table entries need updating.
1641 VM_OBJECT_LOCK_ASSERT(m->object, MA_OWNED);
1642 if ((m->oflags & VPO_BUSY) == 0 &&
1643 (m->aflags & PGA_WRITEABLE) == 0)
1647 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) {
1648 pmap = pvo->pvo_pmap;
1650 if ((pvo->pvo_pte.lpte.pte_lo & LPTE_PP) != LPTE_BR) {
1651 pt = MOEA64_PVO_TO_PTE(mmu, pvo);
1652 pvo->pvo_pte.lpte.pte_lo &= ~LPTE_PP;
1653 pvo->pvo_pte.lpte.pte_lo |= LPTE_BR;
1655 MOEA64_PTE_SYNCH(mmu, pt, &pvo->pvo_pte.lpte);
1656 lo |= pvo->pvo_pte.lpte.pte_lo;
1657 pvo->pvo_pte.lpte.pte_lo &= ~LPTE_CHG;
1658 MOEA64_PTE_CHANGE(mmu, pt,
1659 &pvo->pvo_pte.lpte, pvo->pvo_vpn);
1660 if (pvo->pvo_pmap == kernel_pmap)
1664 if ((lo & LPTE_CHG) != 0)
1669 vm_page_aflag_clear(m, PGA_WRITEABLE);
1673 * moea64_ts_referenced:
1675 * Return a count of reference bits for a page, clearing those bits.
1676 * It is not necessary for every reference bit to be cleared, but it
1677 * is necessary that 0 only be returned when there are truly no
1678 * reference bits set.
1680 * XXX: The exact number of bits to check and clear is a matter that
1681 * should be tested and standardized at some point in the future for
1682 * optimal aging of shared pages.
1685 moea64_ts_referenced(mmu_t mmu, vm_page_t m)
1688 KASSERT((m->oflags & VPO_UNMANAGED) == 0,
1689 ("moea64_ts_referenced: page %p is not managed", m));
1690 return (moea64_clear_bit(mmu, m, LPTE_REF));
1694 * Modify the WIMG settings of all mappings for a page.
1697 moea64_page_set_memattr(mmu_t mmu, vm_page_t m, vm_memattr_t ma)
1699 struct pvo_entry *pvo;
1700 struct pvo_head *pvo_head;
1705 if ((m->oflags & VPO_UNMANAGED) != 0) {
1706 m->md.mdpg_cache_attrs = ma;
1710 pvo_head = vm_page_to_pvoh(m);
1711 lo = moea64_calc_wimg(VM_PAGE_TO_PHYS(m), ma);
1713 LIST_FOREACH(pvo, pvo_head, pvo_vlink) {
1714 pmap = pvo->pvo_pmap;
1716 pt = MOEA64_PVO_TO_PTE(mmu, pvo);
1717 pvo->pvo_pte.lpte.pte_lo &= ~LPTE_WIMG;
1718 pvo->pvo_pte.lpte.pte_lo |= lo;
1720 MOEA64_PTE_CHANGE(mmu, pt, &pvo->pvo_pte.lpte,
1722 if (pvo->pvo_pmap == kernel_pmap)
1728 m->md.mdpg_cache_attrs = ma;
1732 * Map a wired page into kernel virtual address space.
1735 moea64_kenter_attr(mmu_t mmu, vm_offset_t va, vm_offset_t pa, vm_memattr_t ma)
1740 pte_lo = moea64_calc_wimg(pa, ma);
1743 PMAP_LOCK(kernel_pmap);
1744 error = moea64_pvo_enter(mmu, kernel_pmap, moea64_upvo_zone,
1745 &moea64_pvo_kunmanaged, va, pa, pte_lo, PVO_WIRED);
1746 PMAP_UNLOCK(kernel_pmap);
1749 if (error != 0 && error != ENOENT)
1750 panic("moea64_kenter: failed to enter va %#zx pa %#zx: %d", va,
1755 moea64_kenter(mmu_t mmu, vm_offset_t va, vm_offset_t pa)
1758 moea64_kenter_attr(mmu, va, pa, VM_MEMATTR_DEFAULT);
1762 * Extract the physical page address associated with the given kernel virtual
1766 moea64_kextract(mmu_t mmu, vm_offset_t va)
1768 struct pvo_entry *pvo;
1772 * Shortcut the direct-mapped case when applicable. We never put
1773 * anything but 1:1 mappings below VM_MIN_KERNEL_ADDRESS.
1775 if (va < VM_MIN_KERNEL_ADDRESS)
1779 PMAP_LOCK(kernel_pmap);
1780 pvo = moea64_pvo_find_va(kernel_pmap, va);
1781 KASSERT(pvo != NULL, ("moea64_kextract: no addr found for %#" PRIxPTR,
1783 pa = (pvo->pvo_pte.lpte.pte_lo & LPTE_RPGN) | (va - PVO_VADDR(pvo));
1785 PMAP_UNLOCK(kernel_pmap);
1790 * Remove a wired page from kernel virtual address space.
1793 moea64_kremove(mmu_t mmu, vm_offset_t va)
1795 moea64_remove(mmu, kernel_pmap, va, va + PAGE_SIZE);
1799 * Map a range of physical addresses into kernel virtual address space.
1801 * The value passed in *virt is a suggested virtual address for the mapping.
1802 * Architectures which can support a direct-mapped physical to virtual region
1803 * can return the appropriate address within that region, leaving '*virt'
1804 * unchanged. We cannot and therefore do not; *virt is updated with the
1805 * first usable address after the mapped region.
1808 moea64_map(mmu_t mmu, vm_offset_t *virt, vm_offset_t pa_start,
1809 vm_offset_t pa_end, int prot)
1811 vm_offset_t sva, va;
1815 for (; pa_start < pa_end; pa_start += PAGE_SIZE, va += PAGE_SIZE)
1816 moea64_kenter(mmu, va, pa_start);
1823 * Returns true if the pmap's pv is one of the first
1824 * 16 pvs linked to from this page. This count may
1825 * be changed upwards or downwards in the future; it
1826 * is only necessary that true be returned for a small
1827 * subset of pmaps for proper page aging.
1830 moea64_page_exists_quick(mmu_t mmu, pmap_t pmap, vm_page_t m)
1833 struct pvo_entry *pvo;
1836 KASSERT((m->oflags & VPO_UNMANAGED) == 0,
1837 ("moea64_page_exists_quick: page %p is not managed", m));
1841 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) {
1842 if (pvo->pvo_pmap == pmap) {
1854 * Return the number of managed mappings to the given physical page
1858 moea64_page_wired_mappings(mmu_t mmu, vm_page_t m)
1860 struct pvo_entry *pvo;
1864 if ((m->oflags & VPO_UNMANAGED) != 0)
1867 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink)
1868 if ((pvo->pvo_vaddr & PVO_WIRED) != 0)
1874 static uintptr_t moea64_vsidcontext;
1877 moea64_get_unique_vsid(void) {
1884 __asm __volatile("mftb %0" : "=r"(entropy));
1886 mtx_lock(&moea64_slb_mutex);
1887 for (i = 0; i < NVSIDS; i += VSID_NBPW) {
1891 * Create a new value by mutiplying by a prime and adding in
1892 * entropy from the timebase register. This is to make the
1893 * VSID more random so that the PT hash function collides
1894 * less often. (Note that the prime casues gcc to do shifts
1895 * instead of a multiply.)
1897 moea64_vsidcontext = (moea64_vsidcontext * 0x1105) + entropy;
1898 hash = moea64_vsidcontext & (NVSIDS - 1);
1899 if (hash == 0) /* 0 is special, avoid it */
1902 mask = 1 << (hash & (VSID_NBPW - 1));
1903 hash = (moea64_vsidcontext & VSID_HASHMASK);
1904 if (moea64_vsid_bitmap[n] & mask) { /* collision? */
1905 /* anything free in this bucket? */
1906 if (moea64_vsid_bitmap[n] == 0xffffffff) {
1907 entropy = (moea64_vsidcontext >> 20);
1910 i = ffs(~moea64_vsid_bitmap[n]) - 1;
1912 hash &= VSID_HASHMASK & ~(VSID_NBPW - 1);
1915 KASSERT(!(moea64_vsid_bitmap[n] & mask),
1916 ("Allocating in-use VSID %#zx\n", hash));
1917 moea64_vsid_bitmap[n] |= mask;
1918 mtx_unlock(&moea64_slb_mutex);
1922 mtx_unlock(&moea64_slb_mutex);
1923 panic("%s: out of segments",__func__);
1926 #ifdef __powerpc64__
1928 moea64_pinit(mmu_t mmu, pmap_t pmap)
1930 PMAP_LOCK_INIT(pmap);
1931 LIST_INIT(&pmap->pmap_pvo);
1933 pmap->pm_slb_tree_root = slb_alloc_tree();
1934 pmap->pm_slb = slb_alloc_user_cache();
1935 pmap->pm_slb_len = 0;
1939 moea64_pinit(mmu_t mmu, pmap_t pmap)
1944 PMAP_LOCK_INIT(pmap);
1945 LIST_INIT(&pmap->pmap_pvo);
1947 if (pmap_bootstrapped)
1948 pmap->pmap_phys = (pmap_t)moea64_kextract(mmu,
1951 pmap->pmap_phys = pmap;
1954 * Allocate some segment registers for this pmap.
1956 hash = moea64_get_unique_vsid();
1958 for (i = 0; i < 16; i++)
1959 pmap->pm_sr[i] = VSID_MAKE(i, hash);
1961 KASSERT(pmap->pm_sr[0] != 0, ("moea64_pinit: pm_sr[0] = 0"));
1966 * Initialize the pmap associated with process 0.
1969 moea64_pinit0(mmu_t mmu, pmap_t pm)
1971 moea64_pinit(mmu, pm);
1972 bzero(&pm->pm_stats, sizeof(pm->pm_stats));
1976 * Set the physical protection on the specified range of this map as requested.
1979 moea64_pvo_protect(mmu_t mmu, pmap_t pm, struct pvo_entry *pvo, vm_prot_t prot)
1985 PMAP_LOCK_ASSERT(pm, MA_OWNED);
1988 * Grab the PTE pointer before we diddle with the cached PTE
1991 pt = MOEA64_PVO_TO_PTE(mmu, pvo);
1994 * Change the protection of the page.
1996 oldlo = pvo->pvo_pte.lpte.pte_lo;
1997 pvo->pvo_pte.lpte.pte_lo &= ~LPTE_PP;
1998 pvo->pvo_pte.lpte.pte_lo &= ~LPTE_NOEXEC;
1999 if ((prot & VM_PROT_EXECUTE) == 0)
2000 pvo->pvo_pte.lpte.pte_lo |= LPTE_NOEXEC;
2001 if (prot & VM_PROT_WRITE)
2002 pvo->pvo_pte.lpte.pte_lo |= LPTE_BW;
2004 pvo->pvo_pte.lpte.pte_lo |= LPTE_BR;
2006 pg = PHYS_TO_VM_PAGE(pvo->pvo_pte.lpte.pte_lo & LPTE_RPGN);
2009 * If the PVO is in the page table, update that pte as well.
2012 MOEA64_PTE_CHANGE(mmu, pt, &pvo->pvo_pte.lpte,
2014 if (pm != kernel_pmap && pg != NULL && !(pg->aflags & PGA_EXECUTABLE) &&
2015 (pvo->pvo_pte.lpte.pte_lo & (LPTE_I | LPTE_G | LPTE_NOEXEC)) == 0) {
2016 if ((pg->oflags & VPO_UNMANAGED) == 0)
2017 vm_page_aflag_set(pg, PGA_EXECUTABLE);
2018 moea64_syncicache(mmu, pm, PVO_VADDR(pvo),
2019 pvo->pvo_pte.lpte.pte_lo & LPTE_RPGN, PAGE_SIZE);
2023 * Update vm about the REF/CHG bits if the page is managed and we have
2024 * removed write access.
2026 if ((pvo->pvo_vaddr & PVO_MANAGED) == PVO_MANAGED &&
2027 (oldlo & LPTE_PP) != LPTE_BR && !(prot && VM_PROT_WRITE)) {
2029 if (pvo->pvo_pte.lpte.pte_lo & LPTE_CHG)
2031 if (pvo->pvo_pte.lpte.pte_lo & LPTE_REF)
2032 vm_page_aflag_set(pg, PGA_REFERENCED);
2038 moea64_protect(mmu_t mmu, pmap_t pm, vm_offset_t sva, vm_offset_t eva,
2041 struct pvo_entry *pvo, *tpvo;
2043 CTR4(KTR_PMAP, "moea64_protect: pm=%p sva=%#x eva=%#x prot=%#x", pm,
2046 KASSERT(pm == &curproc->p_vmspace->vm_pmap || pm == kernel_pmap,
2047 ("moea64_protect: non current pmap"));
2049 if ((prot & VM_PROT_READ) == VM_PROT_NONE) {
2050 moea64_remove(mmu, pm, sva, eva);
2056 if ((eva - sva)/PAGE_SIZE < pm->pm_stats.resident_count) {
2058 #ifdef __powerpc64__
2059 if (pm != kernel_pmap &&
2060 user_va_to_slb_entry(pm, sva) == NULL) {
2061 sva = roundup2(sva + 1, SEGMENT_LENGTH);
2065 pvo = moea64_pvo_find_va(pm, sva);
2067 moea64_pvo_protect(mmu, pm, pvo, prot);
2071 LIST_FOREACH_SAFE(pvo, &pm->pmap_pvo, pvo_plink, tpvo) {
2072 if (PVO_VADDR(pvo) < sva || PVO_VADDR(pvo) >= eva)
2074 moea64_pvo_protect(mmu, pm, pvo, prot);
2082 * Map a list of wired pages into kernel virtual address space. This is
2083 * intended for temporary mappings which do not need page modification or
2084 * references recorded. Existing mappings in the region are overwritten.
2087 moea64_qenter(mmu_t mmu, vm_offset_t va, vm_page_t *m, int count)
2089 while (count-- > 0) {
2090 moea64_kenter(mmu, va, VM_PAGE_TO_PHYS(*m));
2097 * Remove page mappings from kernel virtual address space. Intended for
2098 * temporary mappings entered by moea64_qenter.
2101 moea64_qremove(mmu_t mmu, vm_offset_t va, int count)
2103 while (count-- > 0) {
2104 moea64_kremove(mmu, va);
2110 moea64_release_vsid(uint64_t vsid)
2114 mtx_lock(&moea64_slb_mutex);
2115 idx = vsid & (NVSIDS-1);
2116 mask = 1 << (idx % VSID_NBPW);
2118 KASSERT(moea64_vsid_bitmap[idx] & mask,
2119 ("Freeing unallocated VSID %#jx", vsid));
2120 moea64_vsid_bitmap[idx] &= ~mask;
2121 mtx_unlock(&moea64_slb_mutex);
2126 moea64_release(mmu_t mmu, pmap_t pmap)
2130 * Free segment registers' VSIDs
2132 #ifdef __powerpc64__
2133 slb_free_tree(pmap);
2134 slb_free_user_cache(pmap->pm_slb);
2136 KASSERT(pmap->pm_sr[0] != 0, ("moea64_release: pm_sr[0] = 0"));
2138 moea64_release_vsid(VSID_TO_HASH(pmap->pm_sr[0]));
2141 PMAP_LOCK_DESTROY(pmap);
2145 * Remove all pages mapped by the specified pmap
2148 moea64_remove_pages(mmu_t mmu, pmap_t pm)
2150 struct pvo_entry *pvo, *tpvo;
2154 LIST_FOREACH_SAFE(pvo, &pm->pmap_pvo, pvo_plink, tpvo) {
2155 if (!(pvo->pvo_vaddr & PVO_WIRED))
2156 moea64_pvo_remove(mmu, pvo);
2163 * Remove the given range of addresses from the specified map.
2166 moea64_remove(mmu_t mmu, pmap_t pm, vm_offset_t sva, vm_offset_t eva)
2168 struct pvo_entry *pvo, *tpvo;
2171 * Perform an unsynchronized read. This is, however, safe.
2173 if (pm->pm_stats.resident_count == 0)
2178 if ((eva - sva)/PAGE_SIZE < pm->pm_stats.resident_count) {
2180 #ifdef __powerpc64__
2181 if (pm != kernel_pmap &&
2182 user_va_to_slb_entry(pm, sva) == NULL) {
2183 sva = roundup2(sva + 1, SEGMENT_LENGTH);
2187 pvo = moea64_pvo_find_va(pm, sva);
2189 moea64_pvo_remove(mmu, pvo);
2193 LIST_FOREACH_SAFE(pvo, &pm->pmap_pvo, pvo_plink, tpvo) {
2194 if (PVO_VADDR(pvo) < sva || PVO_VADDR(pvo) >= eva)
2196 moea64_pvo_remove(mmu, pvo);
2204 * Remove physical page from all pmaps in which it resides. moea64_pvo_remove()
2205 * will reflect changes in pte's back to the vm_page.
2208 moea64_remove_all(mmu_t mmu, vm_page_t m)
2210 struct pvo_entry *pvo, *next_pvo;
2214 LIST_FOREACH_SAFE(pvo, vm_page_to_pvoh(m), pvo_vlink, next_pvo) {
2215 pmap = pvo->pvo_pmap;
2217 moea64_pvo_remove(mmu, pvo);
2221 if ((m->aflags & PGA_WRITEABLE) && moea64_is_modified(mmu, m))
2223 vm_page_aflag_clear(m, PGA_WRITEABLE);
2224 vm_page_aflag_clear(m, PGA_EXECUTABLE);
2228 * Allocate a physical page of memory directly from the phys_avail map.
2229 * Can only be called from moea64_bootstrap before avail start and end are
2233 moea64_bootstrap_alloc(vm_size_t size, u_int align)
2238 size = round_page(size);
2239 for (i = 0; phys_avail[i + 1] != 0; i += 2) {
2241 s = (phys_avail[i] + align - 1) & ~(align - 1);
2246 if (s < phys_avail[i] || e > phys_avail[i + 1])
2249 if (s + size > platform_real_maxaddr())
2252 if (s == phys_avail[i]) {
2253 phys_avail[i] += size;
2254 } else if (e == phys_avail[i + 1]) {
2255 phys_avail[i + 1] -= size;
2257 for (j = phys_avail_count * 2; j > i; j -= 2) {
2258 phys_avail[j] = phys_avail[j - 2];
2259 phys_avail[j + 1] = phys_avail[j - 1];
2262 phys_avail[i + 3] = phys_avail[i + 1];
2263 phys_avail[i + 1] = s;
2264 phys_avail[i + 2] = e;
2270 panic("moea64_bootstrap_alloc: could not allocate memory");
2274 moea64_pvo_enter(mmu_t mmu, pmap_t pm, uma_zone_t zone,
2275 struct pvo_head *pvo_head, vm_offset_t va, vm_offset_t pa,
2276 uint64_t pte_lo, int flags)
2278 struct pvo_entry *pvo;
2286 * One nasty thing that can happen here is that the UMA calls to
2287 * allocate new PVOs need to map more memory, which calls pvo_enter(),
2288 * which calls UMA...
2290 * We break the loop by detecting recursion and allocating out of
2291 * the bootstrap pool.
2295 bootstrap = (flags & PVO_BOOTSTRAP);
2297 if (!moea64_initialized)
2300 PMAP_LOCK_ASSERT(pm, MA_OWNED);
2301 rw_assert(&moea64_table_lock, RA_WLOCKED);
2304 * Compute the PTE Group index.
2307 vsid = va_to_vsid(pm, va);
2308 ptegidx = va_to_pteg(vsid, va, flags & PVO_LARGE);
2311 * Remove any existing mapping for this page. Reuse the pvo entry if
2312 * there is a mapping.
2314 moea64_pvo_enter_calls++;
2316 LIST_FOREACH(pvo, &moea64_pvo_table[ptegidx], pvo_olink) {
2317 if (pvo->pvo_pmap == pm && PVO_VADDR(pvo) == va) {
2318 if ((pvo->pvo_pte.lpte.pte_lo & LPTE_RPGN) == pa &&
2319 (pvo->pvo_pte.lpte.pte_lo & (LPTE_NOEXEC | LPTE_PP))
2320 == (pte_lo & (LPTE_NOEXEC | LPTE_PP))) {
2321 if (!(pvo->pvo_pte.lpte.pte_hi & LPTE_VALID)) {
2322 /* Re-insert if spilled */
2323 i = MOEA64_PTE_INSERT(mmu, ptegidx,
2324 &pvo->pvo_pte.lpte);
2326 PVO_PTEGIDX_SET(pvo, i);
2327 moea64_pte_overflow--;
2331 moea64_pvo_remove(mmu, pvo);
2337 * If we aren't overwriting a mapping, try to allocate.
2340 if (moea64_bpvo_pool_index >= BPVO_POOL_SIZE) {
2341 panic("moea64_enter: bpvo pool exhausted, %d, %d, %zd",
2342 moea64_bpvo_pool_index, BPVO_POOL_SIZE,
2343 BPVO_POOL_SIZE * sizeof(struct pvo_entry));
2345 pvo = &moea64_bpvo_pool[moea64_bpvo_pool_index];
2346 moea64_bpvo_pool_index++;
2350 * Note: drop the table lock around the UMA allocation in
2351 * case the UMA allocator needs to manipulate the page
2352 * table. The mapping we are working with is already
2353 * protected by the PMAP lock.
2355 pvo = uma_zalloc(zone, M_NOWAIT);
2361 moea64_pvo_entries++;
2362 pvo->pvo_vaddr = va;
2363 pvo->pvo_vpn = (uint64_t)((va & ADDR_PIDX) >> ADDR_PIDX_SHFT)
2366 LIST_INSERT_HEAD(&moea64_pvo_table[ptegidx], pvo, pvo_olink);
2367 pvo->pvo_vaddr &= ~ADDR_POFF;
2369 if (flags & PVO_WIRED)
2370 pvo->pvo_vaddr |= PVO_WIRED;
2371 if (pvo_head != &moea64_pvo_kunmanaged)
2372 pvo->pvo_vaddr |= PVO_MANAGED;
2374 pvo->pvo_vaddr |= PVO_BOOTSTRAP;
2375 if (flags & PVO_LARGE)
2376 pvo->pvo_vaddr |= PVO_LARGE;
2378 moea64_pte_create(&pvo->pvo_pte.lpte, vsid, va,
2379 (uint64_t)(pa) | pte_lo, flags);
2384 LIST_INSERT_HEAD(&pm->pmap_pvo, pvo, pvo_plink);
2387 * Remember if the list was empty and therefore will be the first
2390 if (LIST_FIRST(pvo_head) == NULL)
2392 LIST_INSERT_HEAD(pvo_head, pvo, pvo_vlink);
2394 if (pvo->pvo_vaddr & PVO_WIRED) {
2395 pvo->pvo_pte.lpte.pte_hi |= LPTE_WIRED;
2396 pm->pm_stats.wired_count++;
2398 pm->pm_stats.resident_count++;
2401 * We hope this succeeds but it isn't required.
2403 i = MOEA64_PTE_INSERT(mmu, ptegidx, &pvo->pvo_pte.lpte);
2405 PVO_PTEGIDX_SET(pvo, i);
2407 panic("moea64_pvo_enter: overflow");
2408 moea64_pte_overflow++;
2411 if (pm == kernel_pmap)
2414 #ifdef __powerpc64__
2416 * Make sure all our bootstrap mappings are in the SLB as soon
2417 * as virtual memory is switched on.
2419 if (!pmap_bootstrapped)
2420 moea64_bootstrap_slb_prefault(va, flags & PVO_LARGE);
2423 return (first ? ENOENT : 0);
2427 moea64_pvo_remove(mmu_t mmu, struct pvo_entry *pvo)
2432 PMAP_LOCK_ASSERT(pvo->pvo_pmap, MA_OWNED);
2433 rw_assert(&moea64_table_lock, RA_WLOCKED);
2436 * If there is an active pte entry, we need to deactivate it (and
2437 * save the ref & cfg bits).
2439 pt = MOEA64_PVO_TO_PTE(mmu, pvo);
2441 MOEA64_PTE_UNSET(mmu, pt, &pvo->pvo_pte.lpte, pvo->pvo_vpn);
2442 PVO_PTEGIDX_CLR(pvo);
2444 moea64_pte_overflow--;
2448 * Update our statistics.
2450 pvo->pvo_pmap->pm_stats.resident_count--;
2451 if (pvo->pvo_vaddr & PVO_WIRED)
2452 pvo->pvo_pmap->pm_stats.wired_count--;
2455 * Remove this PVO from the PV and pmap lists.
2457 LIST_REMOVE(pvo, pvo_vlink);
2458 LIST_REMOVE(pvo, pvo_plink);
2461 * Remove this from the overflow list and return it to the pool
2462 * if we aren't going to reuse it.
2464 LIST_REMOVE(pvo, pvo_olink);
2467 * Update vm about the REF/CHG bits if the page is managed.
2469 pg = PHYS_TO_VM_PAGE(pvo->pvo_pte.lpte.pte_lo & LPTE_RPGN);
2471 if ((pvo->pvo_vaddr & PVO_MANAGED) == PVO_MANAGED && pg != NULL) {
2472 if ((pvo->pvo_pte.lpte.pte_lo & LPTE_PP) != LPTE_BR) {
2473 if (pvo->pvo_pte.lpte.pte_lo & LPTE_CHG)
2475 if (pvo->pvo_pte.lpte.pte_lo & LPTE_REF)
2476 vm_page_aflag_set(pg, PGA_REFERENCED);
2477 if (LIST_EMPTY(vm_page_to_pvoh(pg)))
2478 vm_page_aflag_clear(pg, PGA_WRITEABLE);
2480 if (LIST_EMPTY(vm_page_to_pvoh(pg)))
2481 vm_page_aflag_clear(pg, PGA_EXECUTABLE);
2484 moea64_pvo_entries--;
2485 moea64_pvo_remove_calls++;
2487 if (!(pvo->pvo_vaddr & PVO_BOOTSTRAP))
2488 uma_zfree((pvo->pvo_vaddr & PVO_MANAGED) ? moea64_mpvo_zone :
2489 moea64_upvo_zone, pvo);
2492 static struct pvo_entry *
2493 moea64_pvo_find_va(pmap_t pm, vm_offset_t va)
2495 struct pvo_entry *pvo;
2498 #ifdef __powerpc64__
2501 if (pm == kernel_pmap) {
2502 slbv = kernel_va_to_slbv(va);
2505 slb = user_va_to_slb_entry(pm, va);
2506 /* The page is not mapped if the segment isn't */
2512 vsid = (slbv & SLBV_VSID_MASK) >> SLBV_VSID_SHIFT;
2514 va &= ~moea64_large_page_mask;
2517 ptegidx = va_to_pteg(vsid, va, slbv & SLBV_L);
2520 vsid = va_to_vsid(pm, va);
2521 ptegidx = va_to_pteg(vsid, va, 0);
2524 LIST_FOREACH(pvo, &moea64_pvo_table[ptegidx], pvo_olink) {
2525 if (pvo->pvo_pmap == pm && PVO_VADDR(pvo) == va)
2533 moea64_query_bit(mmu_t mmu, vm_page_t m, u_int64_t ptebit)
2535 struct pvo_entry *pvo;
2539 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) {
2541 * See if we saved the bit off. If so, return success.
2543 if (pvo->pvo_pte.lpte.pte_lo & ptebit) {
2550 * No luck, now go through the hard part of looking at the PTEs
2551 * themselves. Sync so that any pending REF/CHG bits are flushed to
2555 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) {
2558 * See if this pvo has a valid PTE. if so, fetch the
2559 * REF/CHG bits from the valid PTE. If the appropriate
2560 * ptebit is set, return success.
2562 PMAP_LOCK(pvo->pvo_pmap);
2563 pt = MOEA64_PVO_TO_PTE(mmu, pvo);
2565 MOEA64_PTE_SYNCH(mmu, pt, &pvo->pvo_pte.lpte);
2566 if (pvo->pvo_pte.lpte.pte_lo & ptebit) {
2567 PMAP_UNLOCK(pvo->pvo_pmap);
2572 PMAP_UNLOCK(pvo->pvo_pmap);
2580 moea64_clear_bit(mmu_t mmu, vm_page_t m, u_int64_t ptebit)
2583 struct pvo_entry *pvo;
2587 * Sync so that any pending REF/CHG bits are flushed to the PTEs (so
2588 * we can reset the right ones). note that since the pvo entries and
2589 * list heads are accessed via BAT0 and are never placed in the page
2590 * table, we don't have to worry about further accesses setting the
2596 * For each pvo entry, clear the pvo's ptebit. If this pvo has a
2597 * valid pte clear the ptebit from the valid pte.
2601 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) {
2602 PMAP_LOCK(pvo->pvo_pmap);
2603 pt = MOEA64_PVO_TO_PTE(mmu, pvo);
2605 MOEA64_PTE_SYNCH(mmu, pt, &pvo->pvo_pte.lpte);
2606 if (pvo->pvo_pte.lpte.pte_lo & ptebit) {
2608 MOEA64_PTE_CLEAR(mmu, pt, &pvo->pvo_pte.lpte,
2609 pvo->pvo_vpn, ptebit);
2612 pvo->pvo_pte.lpte.pte_lo &= ~ptebit;
2613 PMAP_UNLOCK(pvo->pvo_pmap);
2621 moea64_dev_direct_mapped(mmu_t mmu, vm_offset_t pa, vm_size_t size)
2623 struct pvo_entry *pvo;
2628 PMAP_LOCK(kernel_pmap);
2629 for (ppa = pa & ~ADDR_POFF; ppa < pa + size; ppa += PAGE_SIZE) {
2630 pvo = moea64_pvo_find_va(kernel_pmap, ppa);
2632 (pvo->pvo_pte.lpte.pte_lo & LPTE_RPGN) != ppa) {
2638 PMAP_UNLOCK(kernel_pmap);
2644 * Map a set of physical memory pages into the kernel virtual
2645 * address space. Return a pointer to where it is mapped. This
2646 * routine is intended to be used for mapping device memory,
2650 moea64_mapdev_attr(mmu_t mmu, vm_offset_t pa, vm_size_t size, vm_memattr_t ma)
2652 vm_offset_t va, tmpva, ppa, offset;
2654 ppa = trunc_page(pa);
2655 offset = pa & PAGE_MASK;
2656 size = roundup2(offset + size, PAGE_SIZE);
2658 va = kmem_alloc_nofault(kernel_map, size);
2661 panic("moea64_mapdev: Couldn't alloc kernel virtual memory");
2663 for (tmpva = va; size > 0;) {
2664 moea64_kenter_attr(mmu, tmpva, ppa, ma);
2670 return ((void *)(va + offset));
2674 moea64_mapdev(mmu_t mmu, vm_offset_t pa, vm_size_t size)
2677 return moea64_mapdev_attr(mmu, pa, size, VM_MEMATTR_DEFAULT);
2681 moea64_unmapdev(mmu_t mmu, vm_offset_t va, vm_size_t size)
2683 vm_offset_t base, offset;
2685 base = trunc_page(va);
2686 offset = va & PAGE_MASK;
2687 size = roundup2(offset + size, PAGE_SIZE);
2689 kmem_free(kernel_map, base, size);
2693 moea64_sync_icache(mmu_t mmu, pmap_t pm, vm_offset_t va, vm_size_t sz)
2695 struct pvo_entry *pvo;
2703 lim = round_page(va);
2704 len = MIN(lim - va, sz);
2705 pvo = moea64_pvo_find_va(pm, va & ~ADDR_POFF);
2706 if (pvo != NULL && !(pvo->pvo_pte.lpte.pte_lo & LPTE_I)) {
2707 pa = (pvo->pvo_pte.lpte.pte_lo & LPTE_RPGN) |
2709 moea64_syncicache(mmu, pm, va, pa, len);