2 * Copyright (c) 2008-2015 Nathan Whitehorn
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
31 * Manages physical address maps.
33 * Since the information managed by this module is also stored by the
34 * logical address mapping module, this module may throw away valid virtual
35 * to physical mappings at almost any time. However, invalidations of
36 * mappings must be done as requested.
38 * In order to cope with hardware architectures which make virtual to
39 * physical map invalidates expensive, this module may delay invalidate
40 * reduced protection operations until such time as they are actually
41 * necessary. This module is given full information as to which processors
42 * are currently using which maps, and to when physical maps must be made
46 #include "opt_compat.h"
47 #include "opt_kstack_pages.h"
49 #include <sys/param.h>
50 #include <sys/kernel.h>
52 #include <sys/queue.h>
53 #include <sys/cpuset.h>
54 #include <sys/kerneldump.h>
57 #include <sys/msgbuf.h>
58 #include <sys/malloc.h>
59 #include <sys/mutex.h>
61 #include <sys/rwlock.h>
62 #include <sys/sched.h>
63 #include <sys/sysctl.h>
64 #include <sys/systm.h>
65 #include <sys/vmmeter.h>
70 #include <dev/ofw/openfirm.h>
73 #include <vm/vm_param.h>
74 #include <vm/vm_kern.h>
75 #include <vm/vm_page.h>
76 #include <vm/vm_map.h>
77 #include <vm/vm_object.h>
78 #include <vm/vm_extern.h>
79 #include <vm/vm_pageout.h>
82 #include <machine/_inttypes.h>
83 #include <machine/cpu.h>
84 #include <machine/platform.h>
85 #include <machine/frame.h>
86 #include <machine/md_var.h>
87 #include <machine/psl.h>
88 #include <machine/bat.h>
89 #include <machine/hid.h>
90 #include <machine/pte.h>
91 #include <machine/sr.h>
92 #include <machine/trap.h>
93 #include <machine/mmuvar.h>
95 #include "mmu_oea64.h"
97 #include "moea64_if.h"
99 void moea64_release_vsid(uint64_t vsid);
100 uintptr_t moea64_get_unique_vsid(void);
102 #define DISABLE_TRANS(msr) msr = mfmsr(); mtmsr(msr & ~PSL_DR)
103 #define ENABLE_TRANS(msr) mtmsr(msr)
105 #define VSID_MAKE(sr, hash) ((sr) | (((hash) & 0xfffff) << 4))
106 #define VSID_TO_HASH(vsid) (((vsid) >> 4) & 0xfffff)
107 #define VSID_HASH_MASK 0x0000007fffffffffULL
112 * There are two locks of interest: the page locks and the pmap locks, which
113 * protect their individual PVO lists and are locked in that order. The contents
114 * of all PVO entries are protected by the locks of their respective pmaps.
115 * The pmap of any PVO is guaranteed not to change so long as the PVO is linked
120 #define PV_LOCK_COUNT PA_LOCK_COUNT*3
121 static struct mtx_padalign pv_lock[PV_LOCK_COUNT];
123 #define PV_LOCKPTR(pa) ((struct mtx *)(&pv_lock[pa_index(pa) % PV_LOCK_COUNT]))
124 #define PV_LOCK(pa) mtx_lock(PV_LOCKPTR(pa))
125 #define PV_UNLOCK(pa) mtx_unlock(PV_LOCKPTR(pa))
126 #define PV_LOCKASSERT(pa) mtx_assert(PV_LOCKPTR(pa), MA_OWNED)
127 #define PV_PAGE_LOCK(m) PV_LOCK(VM_PAGE_TO_PHYS(m))
128 #define PV_PAGE_UNLOCK(m) PV_UNLOCK(VM_PAGE_TO_PHYS(m))
129 #define PV_PAGE_LOCKASSERT(m) PV_LOCKASSERT(VM_PAGE_TO_PHYS(m))
138 extern unsigned char _etext[];
139 extern unsigned char _end[];
142 * Map of physical memory regions.
144 static struct mem_region *regions;
145 static struct mem_region *pregions;
146 static u_int phys_avail_count;
147 static int regions_sz, pregions_sz;
149 extern void bs_remap_earlyboot(void);
152 * Lock for the SLB tables.
154 struct mtx moea64_slb_mutex;
159 u_int moea64_pteg_count;
160 u_int moea64_pteg_mask;
166 uma_zone_t moea64_pvo_zone; /* zone for pvo entries */
168 static struct pvo_entry *moea64_bpvo_pool;
169 static int moea64_bpvo_pool_index = 0;
170 static int moea64_bpvo_pool_size = 327680;
171 TUNABLE_INT("machdep.moea64_bpvo_pool_size", &moea64_bpvo_pool_size);
172 SYSCTL_INT(_machdep, OID_AUTO, moea64_allocated_bpvo_entries, CTLFLAG_RD,
173 &moea64_bpvo_pool_index, 0, "");
175 #define VSID_NBPW (sizeof(u_int32_t) * 8)
177 #define NVSIDS (NPMAPS * 16)
178 #define VSID_HASHMASK 0xffffffffUL
180 #define NVSIDS NPMAPS
181 #define VSID_HASHMASK 0xfffffUL
183 static u_int moea64_vsid_bitmap[NVSIDS / VSID_NBPW];
185 static boolean_t moea64_initialized = FALSE;
190 u_int moea64_pte_valid = 0;
191 u_int moea64_pte_overflow = 0;
192 u_int moea64_pvo_entries = 0;
193 u_int moea64_pvo_enter_calls = 0;
194 u_int moea64_pvo_remove_calls = 0;
195 SYSCTL_INT(_machdep, OID_AUTO, moea64_pte_valid, CTLFLAG_RD,
196 &moea64_pte_valid, 0, "");
197 SYSCTL_INT(_machdep, OID_AUTO, moea64_pte_overflow, CTLFLAG_RD,
198 &moea64_pte_overflow, 0, "");
199 SYSCTL_INT(_machdep, OID_AUTO, moea64_pvo_entries, CTLFLAG_RD,
200 &moea64_pvo_entries, 0, "");
201 SYSCTL_INT(_machdep, OID_AUTO, moea64_pvo_enter_calls, CTLFLAG_RD,
202 &moea64_pvo_enter_calls, 0, "");
203 SYSCTL_INT(_machdep, OID_AUTO, moea64_pvo_remove_calls, CTLFLAG_RD,
204 &moea64_pvo_remove_calls, 0, "");
206 vm_offset_t moea64_scratchpage_va[2];
207 struct pvo_entry *moea64_scratchpage_pvo[2];
208 struct mtx moea64_scratchpage_mtx;
210 uint64_t moea64_large_page_mask = 0;
211 uint64_t moea64_large_page_size = 0;
212 int moea64_large_page_shift = 0;
217 static int moea64_pvo_enter(mmu_t mmu, struct pvo_entry *pvo,
218 struct pvo_head *pvo_head);
219 static void moea64_pvo_remove_from_pmap(mmu_t mmu, struct pvo_entry *pvo);
220 static void moea64_pvo_remove_from_page(mmu_t mmu, struct pvo_entry *pvo);
221 static struct pvo_entry *moea64_pvo_find_va(pmap_t, vm_offset_t);
226 static boolean_t moea64_query_bit(mmu_t, vm_page_t, uint64_t);
227 static u_int moea64_clear_bit(mmu_t, vm_page_t, uint64_t);
228 static void moea64_kremove(mmu_t, vm_offset_t);
229 static void moea64_syncicache(mmu_t, pmap_t pmap, vm_offset_t va,
230 vm_paddr_t pa, vm_size_t sz);
231 static void moea64_pmap_init_qpages(void);
234 * Kernel MMU interface
236 void moea64_clear_modify(mmu_t, vm_page_t);
237 void moea64_copy_page(mmu_t, vm_page_t, vm_page_t);
238 void moea64_copy_pages(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset,
239 vm_page_t *mb, vm_offset_t b_offset, int xfersize);
240 int moea64_enter(mmu_t, pmap_t, vm_offset_t, vm_page_t, vm_prot_t,
241 u_int flags, int8_t psind);
242 void moea64_enter_object(mmu_t, pmap_t, vm_offset_t, vm_offset_t, vm_page_t,
244 void moea64_enter_quick(mmu_t, pmap_t, vm_offset_t, vm_page_t, vm_prot_t);
245 vm_paddr_t moea64_extract(mmu_t, pmap_t, vm_offset_t);
246 vm_page_t moea64_extract_and_hold(mmu_t, pmap_t, vm_offset_t, vm_prot_t);
247 void moea64_init(mmu_t);
248 boolean_t moea64_is_modified(mmu_t, vm_page_t);
249 boolean_t moea64_is_prefaultable(mmu_t, pmap_t, vm_offset_t);
250 boolean_t moea64_is_referenced(mmu_t, vm_page_t);
251 int moea64_ts_referenced(mmu_t, vm_page_t);
252 vm_offset_t moea64_map(mmu_t, vm_offset_t *, vm_paddr_t, vm_paddr_t, int);
253 boolean_t moea64_page_exists_quick(mmu_t, pmap_t, vm_page_t);
254 void moea64_page_init(mmu_t, vm_page_t);
255 int moea64_page_wired_mappings(mmu_t, vm_page_t);
256 void moea64_pinit(mmu_t, pmap_t);
257 void moea64_pinit0(mmu_t, pmap_t);
258 void moea64_protect(mmu_t, pmap_t, vm_offset_t, vm_offset_t, vm_prot_t);
259 void moea64_qenter(mmu_t, vm_offset_t, vm_page_t *, int);
260 void moea64_qremove(mmu_t, vm_offset_t, int);
261 void moea64_release(mmu_t, pmap_t);
262 void moea64_remove(mmu_t, pmap_t, vm_offset_t, vm_offset_t);
263 void moea64_remove_pages(mmu_t, pmap_t);
264 void moea64_remove_all(mmu_t, vm_page_t);
265 void moea64_remove_write(mmu_t, vm_page_t);
266 void moea64_unwire(mmu_t, pmap_t, vm_offset_t, vm_offset_t);
267 void moea64_zero_page(mmu_t, vm_page_t);
268 void moea64_zero_page_area(mmu_t, vm_page_t, int, int);
269 void moea64_activate(mmu_t, struct thread *);
270 void moea64_deactivate(mmu_t, struct thread *);
271 void *moea64_mapdev(mmu_t, vm_paddr_t, vm_size_t);
272 void *moea64_mapdev_attr(mmu_t, vm_paddr_t, vm_size_t, vm_memattr_t);
273 void moea64_unmapdev(mmu_t, vm_offset_t, vm_size_t);
274 vm_paddr_t moea64_kextract(mmu_t, vm_offset_t);
275 void moea64_page_set_memattr(mmu_t, vm_page_t m, vm_memattr_t ma);
276 void moea64_kenter_attr(mmu_t, vm_offset_t, vm_paddr_t, vm_memattr_t ma);
277 void moea64_kenter(mmu_t, vm_offset_t, vm_paddr_t);
278 boolean_t moea64_dev_direct_mapped(mmu_t, vm_paddr_t, vm_size_t);
279 static void moea64_sync_icache(mmu_t, pmap_t, vm_offset_t, vm_size_t);
280 void moea64_dumpsys_map(mmu_t mmu, vm_paddr_t pa, size_t sz,
282 void moea64_scan_init(mmu_t mmu);
283 vm_offset_t moea64_quick_enter_page(mmu_t mmu, vm_page_t m);
284 void moea64_quick_remove_page(mmu_t mmu, vm_offset_t addr);
286 static mmu_method_t moea64_methods[] = {
287 MMUMETHOD(mmu_clear_modify, moea64_clear_modify),
288 MMUMETHOD(mmu_copy_page, moea64_copy_page),
289 MMUMETHOD(mmu_copy_pages, moea64_copy_pages),
290 MMUMETHOD(mmu_enter, moea64_enter),
291 MMUMETHOD(mmu_enter_object, moea64_enter_object),
292 MMUMETHOD(mmu_enter_quick, moea64_enter_quick),
293 MMUMETHOD(mmu_extract, moea64_extract),
294 MMUMETHOD(mmu_extract_and_hold, moea64_extract_and_hold),
295 MMUMETHOD(mmu_init, moea64_init),
296 MMUMETHOD(mmu_is_modified, moea64_is_modified),
297 MMUMETHOD(mmu_is_prefaultable, moea64_is_prefaultable),
298 MMUMETHOD(mmu_is_referenced, moea64_is_referenced),
299 MMUMETHOD(mmu_ts_referenced, moea64_ts_referenced),
300 MMUMETHOD(mmu_map, moea64_map),
301 MMUMETHOD(mmu_page_exists_quick,moea64_page_exists_quick),
302 MMUMETHOD(mmu_page_init, moea64_page_init),
303 MMUMETHOD(mmu_page_wired_mappings,moea64_page_wired_mappings),
304 MMUMETHOD(mmu_pinit, moea64_pinit),
305 MMUMETHOD(mmu_pinit0, moea64_pinit0),
306 MMUMETHOD(mmu_protect, moea64_protect),
307 MMUMETHOD(mmu_qenter, moea64_qenter),
308 MMUMETHOD(mmu_qremove, moea64_qremove),
309 MMUMETHOD(mmu_release, moea64_release),
310 MMUMETHOD(mmu_remove, moea64_remove),
311 MMUMETHOD(mmu_remove_pages, moea64_remove_pages),
312 MMUMETHOD(mmu_remove_all, moea64_remove_all),
313 MMUMETHOD(mmu_remove_write, moea64_remove_write),
314 MMUMETHOD(mmu_sync_icache, moea64_sync_icache),
315 MMUMETHOD(mmu_unwire, moea64_unwire),
316 MMUMETHOD(mmu_zero_page, moea64_zero_page),
317 MMUMETHOD(mmu_zero_page_area, moea64_zero_page_area),
318 MMUMETHOD(mmu_activate, moea64_activate),
319 MMUMETHOD(mmu_deactivate, moea64_deactivate),
320 MMUMETHOD(mmu_page_set_memattr, moea64_page_set_memattr),
321 MMUMETHOD(mmu_quick_enter_page, moea64_quick_enter_page),
322 MMUMETHOD(mmu_quick_remove_page, moea64_quick_remove_page),
324 /* Internal interfaces */
325 MMUMETHOD(mmu_mapdev, moea64_mapdev),
326 MMUMETHOD(mmu_mapdev_attr, moea64_mapdev_attr),
327 MMUMETHOD(mmu_unmapdev, moea64_unmapdev),
328 MMUMETHOD(mmu_kextract, moea64_kextract),
329 MMUMETHOD(mmu_kenter, moea64_kenter),
330 MMUMETHOD(mmu_kenter_attr, moea64_kenter_attr),
331 MMUMETHOD(mmu_dev_direct_mapped,moea64_dev_direct_mapped),
332 MMUMETHOD(mmu_scan_init, moea64_scan_init),
333 MMUMETHOD(mmu_dumpsys_map, moea64_dumpsys_map),
338 MMU_DEF(oea64_mmu, "mmu_oea64_base", moea64_methods, 0);
340 static struct pvo_head *
341 vm_page_to_pvoh(vm_page_t m)
344 mtx_assert(PV_LOCKPTR(VM_PAGE_TO_PHYS(m)), MA_OWNED);
345 return (&m->md.mdpg_pvoh);
348 static struct pvo_entry *
349 alloc_pvo_entry(int bootstrap)
351 struct pvo_entry *pvo;
353 if (!moea64_initialized || bootstrap) {
354 if (moea64_bpvo_pool_index >= moea64_bpvo_pool_size) {
355 panic("moea64_enter: bpvo pool exhausted, %d, %d, %zd",
356 moea64_bpvo_pool_index, moea64_bpvo_pool_size,
357 moea64_bpvo_pool_size * sizeof(struct pvo_entry));
359 pvo = &moea64_bpvo_pool[
360 atomic_fetchadd_int(&moea64_bpvo_pool_index, 1)];
361 bzero(pvo, sizeof(*pvo));
362 pvo->pvo_vaddr = PVO_BOOTSTRAP;
364 pvo = uma_zalloc(moea64_pvo_zone, M_NOWAIT);
365 bzero(pvo, sizeof(*pvo));
373 init_pvo_entry(struct pvo_entry *pvo, pmap_t pmap, vm_offset_t va)
379 PMAP_LOCK_ASSERT(pmap, MA_OWNED);
381 pvo->pvo_pmap = pmap;
383 pvo->pvo_vaddr |= va;
384 vsid = va_to_vsid(pmap, va);
385 pvo->pvo_vpn = (uint64_t)((va & ADDR_PIDX) >> ADDR_PIDX_SHFT)
388 shift = (pvo->pvo_vaddr & PVO_LARGE) ? moea64_large_page_shift :
390 hash = (vsid & VSID_HASH_MASK) ^ (((uint64_t)va & ADDR_PIDX) >> shift);
391 pvo->pvo_pte.slot = (hash & moea64_pteg_mask) << 3;
395 free_pvo_entry(struct pvo_entry *pvo)
398 if (!(pvo->pvo_vaddr & PVO_BOOTSTRAP))
399 uma_zfree(moea64_pvo_zone, pvo);
403 moea64_pte_from_pvo(const struct pvo_entry *pvo, struct lpte *lpte)
406 lpte->pte_hi = (pvo->pvo_vpn >> (ADDR_API_SHFT64 - ADDR_PIDX_SHFT)) &
408 lpte->pte_hi |= LPTE_VALID;
410 if (pvo->pvo_vaddr & PVO_LARGE)
411 lpte->pte_hi |= LPTE_BIG;
412 if (pvo->pvo_vaddr & PVO_WIRED)
413 lpte->pte_hi |= LPTE_WIRED;
414 if (pvo->pvo_vaddr & PVO_HID)
415 lpte->pte_hi |= LPTE_HID;
417 lpte->pte_lo = pvo->pvo_pte.pa; /* Includes WIMG bits */
418 if (pvo->pvo_pte.prot & VM_PROT_WRITE)
419 lpte->pte_lo |= LPTE_BW;
421 lpte->pte_lo |= LPTE_BR;
423 if (!(pvo->pvo_pte.prot & VM_PROT_EXECUTE))
424 lpte->pte_lo |= LPTE_NOEXEC;
427 static __inline uint64_t
428 moea64_calc_wimg(vm_paddr_t pa, vm_memattr_t ma)
433 if (ma != VM_MEMATTR_DEFAULT) {
435 case VM_MEMATTR_UNCACHEABLE:
436 return (LPTE_I | LPTE_G);
437 case VM_MEMATTR_CACHEABLE:
439 case VM_MEMATTR_WRITE_COMBINING:
440 case VM_MEMATTR_WRITE_BACK:
441 case VM_MEMATTR_PREFETCHABLE:
443 case VM_MEMATTR_WRITE_THROUGH:
444 return (LPTE_W | LPTE_M);
449 * Assume the page is cache inhibited and access is guarded unless
450 * it's in our available memory array.
452 pte_lo = LPTE_I | LPTE_G;
453 for (i = 0; i < pregions_sz; i++) {
454 if ((pa >= pregions[i].mr_start) &&
455 (pa < (pregions[i].mr_start + pregions[i].mr_size))) {
456 pte_lo &= ~(LPTE_I | LPTE_G);
466 * Quick sort callout for comparing memory regions.
468 static int om_cmp(const void *a, const void *b);
471 om_cmp(const void *a, const void *b)
473 const struct ofw_map *mapa;
474 const struct ofw_map *mapb;
478 if (mapa->om_pa < mapb->om_pa)
480 else if (mapa->om_pa > mapb->om_pa)
487 moea64_add_ofw_mappings(mmu_t mmup, phandle_t mmu, size_t sz)
489 struct ofw_map translations[sz/(4*sizeof(cell_t))]; /*>= 4 cells per */
490 pcell_t acells, trans_cells[sz/sizeof(cell_t)];
491 struct pvo_entry *pvo;
497 bzero(translations, sz);
498 OF_getencprop(OF_finddevice("/"), "#address-cells", &acells,
500 if (OF_getencprop(mmu, "translations", trans_cells, sz) == -1)
501 panic("moea64_bootstrap: can't get ofw translations");
503 CTR0(KTR_PMAP, "moea64_add_ofw_mappings: translations");
504 sz /= sizeof(cell_t);
505 for (i = 0, j = 0; i < sz; j++) {
506 translations[j].om_va = trans_cells[i++];
507 translations[j].om_len = trans_cells[i++];
508 translations[j].om_pa = trans_cells[i++];
510 translations[j].om_pa <<= 32;
511 translations[j].om_pa |= trans_cells[i++];
513 translations[j].om_mode = trans_cells[i++];
515 KASSERT(i == sz, ("Translations map has incorrect cell count (%d/%zd)",
519 qsort(translations, sz, sizeof (*translations), om_cmp);
521 for (i = 0; i < sz; i++) {
522 pa_base = translations[i].om_pa;
523 #ifndef __powerpc64__
524 if ((translations[i].om_pa >> 32) != 0)
525 panic("OFW translations above 32-bit boundary!");
528 if (pa_base % PAGE_SIZE)
529 panic("OFW translation not page-aligned (phys)!");
530 if (translations[i].om_va % PAGE_SIZE)
531 panic("OFW translation not page-aligned (virt)!");
533 CTR3(KTR_PMAP, "translation: pa=%#zx va=%#x len=%#x",
534 pa_base, translations[i].om_va, translations[i].om_len);
536 /* Now enter the pages for this mapping */
539 for (off = 0; off < translations[i].om_len; off += PAGE_SIZE) {
540 /* If this address is direct-mapped, skip remapping */
541 if (hw_direct_map && translations[i].om_va == pa_base &&
542 moea64_calc_wimg(pa_base + off, VM_MEMATTR_DEFAULT) == LPTE_M)
545 PMAP_LOCK(kernel_pmap);
546 pvo = moea64_pvo_find_va(kernel_pmap,
547 translations[i].om_va + off);
548 PMAP_UNLOCK(kernel_pmap);
552 moea64_kenter(mmup, translations[i].om_va + off,
561 moea64_probe_large_page(void)
563 uint16_t pvr = mfpvr() >> 16;
569 powerpc_sync(); isync();
570 mtspr(SPR_HID4, mfspr(SPR_HID4) & ~HID4_970_DISABLE_LG_PG);
571 powerpc_sync(); isync();
575 moea64_large_page_size = 0x1000000; /* 16 MB */
576 moea64_large_page_shift = 24;
579 moea64_large_page_mask = moea64_large_page_size - 1;
583 moea64_bootstrap_slb_prefault(vm_offset_t va, int large)
590 cache = PCPU_GET(slb);
591 esid = va >> ADDR_SR_SHFT;
592 slbe = (esid << SLBE_ESID_SHIFT) | SLBE_VALID;
594 for (i = 0; i < 64; i++) {
595 if (cache[i].slbe == (slbe | i))
600 entry.slbv = KERNEL_VSID(esid) << SLBV_VSID_SHIFT;
602 entry.slbv |= SLBV_L;
604 slb_insert_kernel(entry.slbe, entry.slbv);
609 moea64_setup_direct_map(mmu_t mmup, vm_offset_t kernelstart,
610 vm_offset_t kernelend)
612 struct pvo_entry *pvo;
615 vm_offset_t size, off;
619 if (moea64_large_page_size == 0)
624 PMAP_LOCK(kernel_pmap);
625 for (i = 0; i < pregions_sz; i++) {
626 for (pa = pregions[i].mr_start; pa < pregions[i].mr_start +
627 pregions[i].mr_size; pa += moea64_large_page_size) {
630 pvo = alloc_pvo_entry(1 /* bootstrap */);
631 pvo->pvo_vaddr |= PVO_WIRED | PVO_LARGE;
632 init_pvo_entry(pvo, kernel_pmap, pa);
635 * Set memory access as guarded if prefetch within
636 * the page could exit the available physmem area.
638 if (pa & moea64_large_page_mask) {
639 pa &= moea64_large_page_mask;
642 if (pa + moea64_large_page_size >
643 pregions[i].mr_start + pregions[i].mr_size)
646 pvo->pvo_pte.prot = VM_PROT_READ | VM_PROT_WRITE |
648 pvo->pvo_pte.pa = pa | pte_lo;
649 moea64_pvo_enter(mmup, pvo, NULL);
652 PMAP_UNLOCK(kernel_pmap);
654 size = moea64_bpvo_pool_size*sizeof(struct pvo_entry);
655 off = (vm_offset_t)(moea64_bpvo_pool);
656 for (pa = off; pa < off + size; pa += PAGE_SIZE)
657 moea64_kenter(mmup, pa, pa);
660 * Map certain important things, like ourselves.
662 * NOTE: We do not map the exception vector space. That code is
663 * used only in real mode, and leaving it unmapped allows us to
664 * catch NULL pointer deferences, instead of making NULL a valid
668 for (pa = kernelstart & ~PAGE_MASK; pa < kernelend;
670 moea64_kenter(mmup, pa, pa);
675 * Allow user to override unmapped_buf_allowed for testing.
676 * XXXKIB Only direct map implementation was tested.
678 if (!TUNABLE_INT_FETCH("vfs.unmapped_buf_allowed",
679 &unmapped_buf_allowed))
680 unmapped_buf_allowed = hw_direct_map;
684 moea64_early_bootstrap(mmu_t mmup, vm_offset_t kernelstart, vm_offset_t kernelend)
687 vm_size_t physsz, hwphyssz;
689 #ifndef __powerpc64__
690 /* We don't have a direct map since there is no BAT */
693 /* Make sure battable is zero, since we have no BAT */
694 for (i = 0; i < 16; i++) {
695 battable[i].batu = 0;
696 battable[i].batl = 0;
699 moea64_probe_large_page();
701 /* Use a direct map if we have large page support */
702 if (moea64_large_page_size > 0)
708 /* Get physical memory regions from firmware */
709 mem_regions(&pregions, &pregions_sz, ®ions, ®ions_sz);
710 CTR0(KTR_PMAP, "moea64_bootstrap: physical memory");
712 if (sizeof(phys_avail)/sizeof(phys_avail[0]) < regions_sz)
713 panic("moea64_bootstrap: phys_avail too small");
715 phys_avail_count = 0;
718 TUNABLE_ULONG_FETCH("hw.physmem", (u_long *) &hwphyssz);
719 for (i = 0, j = 0; i < regions_sz; i++, j += 2) {
720 CTR3(KTR_PMAP, "region: %#zx - %#zx (%#zx)",
721 regions[i].mr_start, regions[i].mr_start +
722 regions[i].mr_size, regions[i].mr_size);
724 (physsz + regions[i].mr_size) >= hwphyssz) {
725 if (physsz < hwphyssz) {
726 phys_avail[j] = regions[i].mr_start;
727 phys_avail[j + 1] = regions[i].mr_start +
734 phys_avail[j] = regions[i].mr_start;
735 phys_avail[j + 1] = regions[i].mr_start + regions[i].mr_size;
737 physsz += regions[i].mr_size;
740 /* Check for overlap with the kernel and exception vectors */
741 for (j = 0; j < 2*phys_avail_count; j+=2) {
742 if (phys_avail[j] < EXC_LAST)
743 phys_avail[j] += EXC_LAST;
745 if (kernelstart >= phys_avail[j] &&
746 kernelstart < phys_avail[j+1]) {
747 if (kernelend < phys_avail[j+1]) {
748 phys_avail[2*phys_avail_count] =
749 (kernelend & ~PAGE_MASK) + PAGE_SIZE;
750 phys_avail[2*phys_avail_count + 1] =
755 phys_avail[j+1] = kernelstart & ~PAGE_MASK;
758 if (kernelend >= phys_avail[j] &&
759 kernelend < phys_avail[j+1]) {
760 if (kernelstart > phys_avail[j]) {
761 phys_avail[2*phys_avail_count] = phys_avail[j];
762 phys_avail[2*phys_avail_count + 1] =
763 kernelstart & ~PAGE_MASK;
767 phys_avail[j] = (kernelend & ~PAGE_MASK) + PAGE_SIZE;
771 physmem = btoc(physsz);
774 moea64_pteg_count = PTEGCOUNT;
776 moea64_pteg_count = 0x1000;
778 while (moea64_pteg_count < physmem)
779 moea64_pteg_count <<= 1;
781 moea64_pteg_count >>= 1;
782 #endif /* PTEGCOUNT */
786 moea64_mid_bootstrap(mmu_t mmup, vm_offset_t kernelstart, vm_offset_t kernelend)
793 moea64_pteg_mask = moea64_pteg_count - 1;
796 * Initialize SLB table lock and page locks
798 mtx_init(&moea64_slb_mutex, "SLB table", NULL, MTX_DEF);
799 for (i = 0; i < PV_LOCK_COUNT; i++)
800 mtx_init(&pv_lock[i], "page pv", NULL, MTX_DEF);
803 * Initialise the bootstrap pvo pool.
805 moea64_bpvo_pool = (struct pvo_entry *)moea64_bootstrap_alloc(
806 moea64_bpvo_pool_size*sizeof(struct pvo_entry), 0);
807 moea64_bpvo_pool_index = 0;
810 * Make sure kernel vsid is allocated as well as VSID 0.
812 #ifndef __powerpc64__
813 moea64_vsid_bitmap[(KERNEL_VSIDBITS & (NVSIDS - 1)) / VSID_NBPW]
814 |= 1 << (KERNEL_VSIDBITS % VSID_NBPW);
815 moea64_vsid_bitmap[0] |= 1;
819 * Initialize the kernel pmap (which is statically allocated).
822 for (i = 0; i < 64; i++) {
823 pcpup->pc_slb[i].slbv = 0;
824 pcpup->pc_slb[i].slbe = 0;
827 for (i = 0; i < 16; i++)
828 kernel_pmap->pm_sr[i] = EMPTY_SEGMENT + i;
831 kernel_pmap->pmap_phys = kernel_pmap;
832 CPU_FILL(&kernel_pmap->pm_active);
833 RB_INIT(&kernel_pmap->pmap_pvo);
835 PMAP_LOCK_INIT(kernel_pmap);
838 * Now map in all the other buffers we allocated earlier
841 moea64_setup_direct_map(mmup, kernelstart, kernelend);
845 moea64_late_bootstrap(mmu_t mmup, vm_offset_t kernelstart, vm_offset_t kernelend)
856 * Set up the Open Firmware pmap and add its mappings if not in real
860 chosen = OF_finddevice("/chosen");
861 if (chosen != -1 && OF_getencprop(chosen, "mmu", &mmui, 4) != -1) {
862 mmu = OF_instance_to_package(mmui);
864 (sz = OF_getproplen(mmu, "translations")) == -1)
866 if (sz > 6144 /* tmpstksz - 2 KB headroom */)
867 panic("moea64_bootstrap: too many ofw translations");
870 moea64_add_ofw_mappings(mmup, mmu, sz);
874 * Calculate the last available physical address.
876 for (i = 0; phys_avail[i + 2] != 0; i += 2)
878 Maxmem = powerpc_btop(phys_avail[i + 1]);
881 * Initialize MMU and remap early physical mappings
883 MMU_CPU_BOOTSTRAP(mmup,0);
884 mtmsr(mfmsr() | PSL_DR | PSL_IR);
886 bs_remap_earlyboot();
889 * Set the start and end of kva.
891 virtual_avail = VM_MIN_KERNEL_ADDRESS;
892 virtual_end = VM_MAX_SAFE_KERNEL_ADDRESS;
895 * Map the entire KVA range into the SLB. We must not fault there.
898 for (va = virtual_avail; va < virtual_end; va += SEGMENT_LENGTH)
899 moea64_bootstrap_slb_prefault(va, 0);
903 * Figure out how far we can extend virtual_end into segment 16
904 * without running into existing mappings. Segment 16 is guaranteed
905 * to contain neither RAM nor devices (at least on Apple hardware),
906 * but will generally contain some OFW mappings we should not
910 #ifndef __powerpc64__ /* KVA is in high memory on PPC64 */
911 PMAP_LOCK(kernel_pmap);
912 while (virtual_end < VM_MAX_KERNEL_ADDRESS &&
913 moea64_pvo_find_va(kernel_pmap, virtual_end+1) == NULL)
914 virtual_end += PAGE_SIZE;
915 PMAP_UNLOCK(kernel_pmap);
919 * Allocate a kernel stack with a guard page for thread0 and map it
920 * into the kernel page map.
922 pa = moea64_bootstrap_alloc(kstack_pages * PAGE_SIZE, PAGE_SIZE);
923 va = virtual_avail + KSTACK_GUARD_PAGES * PAGE_SIZE;
924 virtual_avail = va + kstack_pages * PAGE_SIZE;
925 CTR2(KTR_PMAP, "moea64_bootstrap: kstack0 at %#x (%#x)", pa, va);
926 thread0.td_kstack = va;
927 thread0.td_kstack_pages = kstack_pages;
928 for (i = 0; i < kstack_pages; i++) {
929 moea64_kenter(mmup, va, pa);
935 * Allocate virtual address space for the message buffer.
937 pa = msgbuf_phys = moea64_bootstrap_alloc(msgbufsize, PAGE_SIZE);
938 msgbufp = (struct msgbuf *)virtual_avail;
940 virtual_avail += round_page(msgbufsize);
941 while (va < virtual_avail) {
942 moea64_kenter(mmup, va, pa);
948 * Allocate virtual address space for the dynamic percpu area.
950 pa = moea64_bootstrap_alloc(DPCPU_SIZE, PAGE_SIZE);
951 dpcpu = (void *)virtual_avail;
953 virtual_avail += DPCPU_SIZE;
954 while (va < virtual_avail) {
955 moea64_kenter(mmup, va, pa);
959 dpcpu_init(dpcpu, 0);
962 * Allocate some things for page zeroing. We put this directly
963 * in the page table and use MOEA64_PTE_REPLACE to avoid any
964 * of the PVO book-keeping or other parts of the VM system
965 * from even knowing that this hack exists.
968 if (!hw_direct_map) {
969 mtx_init(&moea64_scratchpage_mtx, "pvo zero page", NULL,
971 for (i = 0; i < 2; i++) {
972 moea64_scratchpage_va[i] = (virtual_end+1) - PAGE_SIZE;
973 virtual_end -= PAGE_SIZE;
975 moea64_kenter(mmup, moea64_scratchpage_va[i], 0);
977 PMAP_LOCK(kernel_pmap);
978 moea64_scratchpage_pvo[i] = moea64_pvo_find_va(
979 kernel_pmap, (vm_offset_t)moea64_scratchpage_va[i]);
980 PMAP_UNLOCK(kernel_pmap);
986 moea64_pmap_init_qpages(void)
996 pc->pc_qmap_addr = kva_alloc(PAGE_SIZE);
997 if (pc->pc_qmap_addr == 0)
998 panic("pmap_init_qpages: unable to allocate KVA");
999 PMAP_LOCK(kernel_pmap);
1000 pc->pc_qmap_pvo = moea64_pvo_find_va(kernel_pmap, pc->pc_qmap_addr);
1001 PMAP_UNLOCK(kernel_pmap);
1002 mtx_init(&pc->pc_qmap_lock, "qmap lock", NULL, MTX_DEF);
1006 SYSINIT(qpages_init, SI_SUB_CPU, SI_ORDER_ANY, moea64_pmap_init_qpages, NULL);
1009 * Activate a user pmap. This mostly involves setting some non-CPU
1013 moea64_activate(mmu_t mmu, struct thread *td)
1017 pm = &td->td_proc->p_vmspace->vm_pmap;
1018 CPU_SET(PCPU_GET(cpuid), &pm->pm_active);
1020 #ifdef __powerpc64__
1021 PCPU_SET(userslb, pm->pm_slb);
1022 __asm __volatile("slbmte %0, %1; isync" ::
1023 "r"(td->td_pcb->pcb_cpu.aim.usr_vsid), "r"(USER_SLB_SLBE));
1025 PCPU_SET(curpmap, pm->pmap_phys);
1026 mtsrin(USER_SR << ADDR_SR_SHFT, td->td_pcb->pcb_cpu.aim.usr_vsid);
1031 moea64_deactivate(mmu_t mmu, struct thread *td)
1035 __asm __volatile("isync; slbie %0" :: "r"(USER_ADDR));
1037 pm = &td->td_proc->p_vmspace->vm_pmap;
1038 CPU_CLR(PCPU_GET(cpuid), &pm->pm_active);
1039 #ifdef __powerpc64__
1040 PCPU_SET(userslb, NULL);
1042 PCPU_SET(curpmap, NULL);
1047 moea64_unwire(mmu_t mmu, pmap_t pm, vm_offset_t sva, vm_offset_t eva)
1049 struct pvo_entry key, *pvo;
1053 key.pvo_vaddr = sva;
1055 for (pvo = RB_NFIND(pvo_tree, &pm->pmap_pvo, &key);
1056 pvo != NULL && PVO_VADDR(pvo) < eva;
1057 pvo = RB_NEXT(pvo_tree, &pm->pmap_pvo, pvo)) {
1058 if ((pvo->pvo_vaddr & PVO_WIRED) == 0)
1059 panic("moea64_unwire: pvo %p is missing PVO_WIRED",
1061 pvo->pvo_vaddr &= ~PVO_WIRED;
1062 refchg = MOEA64_PTE_REPLACE(mmu, pvo, 0 /* No invalidation */);
1063 if ((pvo->pvo_vaddr & PVO_MANAGED) &&
1064 (pvo->pvo_pte.prot & VM_PROT_WRITE)) {
1067 m = PHYS_TO_VM_PAGE(pvo->pvo_pte.pa & LPTE_RPGN);
1069 refchg |= atomic_readandclear_32(&m->md.mdpg_attrs);
1070 if (refchg & LPTE_CHG)
1072 if (refchg & LPTE_REF)
1073 vm_page_aflag_set(m, PGA_REFERENCED);
1075 pm->pm_stats.wired_count--;
1081 * This goes through and sets the physical address of our
1082 * special scratch PTE to the PA we want to zero or copy. Because
1083 * of locking issues (this can get called in pvo_enter() by
1084 * the UMA allocator), we can't use most other utility functions here
1088 void moea64_set_scratchpage_pa(mmu_t mmup, int which, vm_paddr_t pa) {
1090 KASSERT(!hw_direct_map, ("Using OEA64 scratchpage with a direct map!"));
1091 mtx_assert(&moea64_scratchpage_mtx, MA_OWNED);
1093 moea64_scratchpage_pvo[which]->pvo_pte.pa =
1094 moea64_calc_wimg(pa, VM_MEMATTR_DEFAULT) | (uint64_t)pa;
1095 MOEA64_PTE_REPLACE(mmup, moea64_scratchpage_pvo[which],
1096 MOEA64_PTE_INVALIDATE);
1101 moea64_copy_page(mmu_t mmu, vm_page_t msrc, vm_page_t mdst)
1106 dst = VM_PAGE_TO_PHYS(mdst);
1107 src = VM_PAGE_TO_PHYS(msrc);
1109 if (hw_direct_map) {
1110 bcopy((void *)src, (void *)dst, PAGE_SIZE);
1112 mtx_lock(&moea64_scratchpage_mtx);
1114 moea64_set_scratchpage_pa(mmu, 0, src);
1115 moea64_set_scratchpage_pa(mmu, 1, dst);
1117 bcopy((void *)moea64_scratchpage_va[0],
1118 (void *)moea64_scratchpage_va[1], PAGE_SIZE);
1120 mtx_unlock(&moea64_scratchpage_mtx);
1125 moea64_copy_pages_dmap(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset,
1126 vm_page_t *mb, vm_offset_t b_offset, int xfersize)
1129 vm_offset_t a_pg_offset, b_pg_offset;
1132 while (xfersize > 0) {
1133 a_pg_offset = a_offset & PAGE_MASK;
1134 cnt = min(xfersize, PAGE_SIZE - a_pg_offset);
1135 a_cp = (char *)VM_PAGE_TO_PHYS(ma[a_offset >> PAGE_SHIFT]) +
1137 b_pg_offset = b_offset & PAGE_MASK;
1138 cnt = min(cnt, PAGE_SIZE - b_pg_offset);
1139 b_cp = (char *)VM_PAGE_TO_PHYS(mb[b_offset >> PAGE_SHIFT]) +
1141 bcopy(a_cp, b_cp, cnt);
1149 moea64_copy_pages_nodmap(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset,
1150 vm_page_t *mb, vm_offset_t b_offset, int xfersize)
1153 vm_offset_t a_pg_offset, b_pg_offset;
1156 mtx_lock(&moea64_scratchpage_mtx);
1157 while (xfersize > 0) {
1158 a_pg_offset = a_offset & PAGE_MASK;
1159 cnt = min(xfersize, PAGE_SIZE - a_pg_offset);
1160 moea64_set_scratchpage_pa(mmu, 0,
1161 VM_PAGE_TO_PHYS(ma[a_offset >> PAGE_SHIFT]));
1162 a_cp = (char *)moea64_scratchpage_va[0] + a_pg_offset;
1163 b_pg_offset = b_offset & PAGE_MASK;
1164 cnt = min(cnt, PAGE_SIZE - b_pg_offset);
1165 moea64_set_scratchpage_pa(mmu, 1,
1166 VM_PAGE_TO_PHYS(mb[b_offset >> PAGE_SHIFT]));
1167 b_cp = (char *)moea64_scratchpage_va[1] + b_pg_offset;
1168 bcopy(a_cp, b_cp, cnt);
1173 mtx_unlock(&moea64_scratchpage_mtx);
1177 moea64_copy_pages(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset,
1178 vm_page_t *mb, vm_offset_t b_offset, int xfersize)
1181 if (hw_direct_map) {
1182 moea64_copy_pages_dmap(mmu, ma, a_offset, mb, b_offset,
1185 moea64_copy_pages_nodmap(mmu, ma, a_offset, mb, b_offset,
1191 moea64_zero_page_area(mmu_t mmu, vm_page_t m, int off, int size)
1193 vm_paddr_t pa = VM_PAGE_TO_PHYS(m);
1195 if (size + off > PAGE_SIZE)
1196 panic("moea64_zero_page: size + off > PAGE_SIZE");
1198 if (hw_direct_map) {
1199 bzero((caddr_t)pa + off, size);
1201 mtx_lock(&moea64_scratchpage_mtx);
1202 moea64_set_scratchpage_pa(mmu, 0, pa);
1203 bzero((caddr_t)moea64_scratchpage_va[0] + off, size);
1204 mtx_unlock(&moea64_scratchpage_mtx);
1209 * Zero a page of physical memory by temporarily mapping it
1212 moea64_zero_page(mmu_t mmu, vm_page_t m)
1214 vm_paddr_t pa = VM_PAGE_TO_PHYS(m);
1215 vm_offset_t va, off;
1217 if (!hw_direct_map) {
1218 mtx_lock(&moea64_scratchpage_mtx);
1220 moea64_set_scratchpage_pa(mmu, 0, pa);
1221 va = moea64_scratchpage_va[0];
1226 for (off = 0; off < PAGE_SIZE; off += cacheline_size)
1227 __asm __volatile("dcbz 0,%0" :: "r"(va + off));
1230 mtx_unlock(&moea64_scratchpage_mtx);
1234 moea64_quick_enter_page(mmu_t mmu, vm_page_t m)
1236 struct pvo_entry *pvo;
1237 vm_paddr_t pa = VM_PAGE_TO_PHYS(m);
1243 * MOEA64_PTE_REPLACE does some locking, so we can't just grab
1244 * a critical section and access the PCPU data like on i386.
1245 * Instead, pin the thread and grab the PCPU lock to prevent
1246 * a preempting thread from using the same PCPU data.
1250 mtx_assert(PCPU_PTR(qmap_lock), MA_NOTOWNED);
1251 pvo = PCPU_GET(qmap_pvo);
1253 mtx_lock(PCPU_PTR(qmap_lock));
1254 pvo->pvo_pte.pa = moea64_calc_wimg(pa, pmap_page_get_memattr(m)) |
1256 MOEA64_PTE_REPLACE(mmu, pvo, MOEA64_PTE_INVALIDATE);
1259 return (PCPU_GET(qmap_addr));
1263 moea64_quick_remove_page(mmu_t mmu, vm_offset_t addr)
1268 mtx_assert(PCPU_PTR(qmap_lock), MA_OWNED);
1269 KASSERT(PCPU_GET(qmap_addr) == addr,
1270 ("moea64_quick_remove_page: invalid address"));
1271 mtx_unlock(PCPU_PTR(qmap_lock));
1276 * Map the given physical page at the specified virtual address in the
1277 * target pmap with the protection requested. If specified the page
1278 * will be wired down.
1282 moea64_enter(mmu_t mmu, pmap_t pmap, vm_offset_t va, vm_page_t m,
1283 vm_prot_t prot, u_int flags, int8_t psind)
1285 struct pvo_entry *pvo, *oldpvo;
1286 struct pvo_head *pvo_head;
1290 if ((m->oflags & VPO_UNMANAGED) == 0 && !vm_page_xbusied(m))
1291 VM_OBJECT_ASSERT_LOCKED(m->object);
1293 pvo = alloc_pvo_entry(0);
1294 pvo->pvo_pmap = NULL; /* to be filled in later */
1295 pvo->pvo_pte.prot = prot;
1297 pte_lo = moea64_calc_wimg(VM_PAGE_TO_PHYS(m), pmap_page_get_memattr(m));
1298 pvo->pvo_pte.pa = VM_PAGE_TO_PHYS(m) | pte_lo;
1300 if ((flags & PMAP_ENTER_WIRED) != 0)
1301 pvo->pvo_vaddr |= PVO_WIRED;
1303 if ((m->oflags & VPO_UNMANAGED) != 0 || !moea64_initialized) {
1306 pvo_head = &m->md.mdpg_pvoh;
1307 pvo->pvo_vaddr |= PVO_MANAGED;
1313 if (pvo->pvo_pmap == NULL)
1314 init_pvo_entry(pvo, pmap, va);
1315 if (prot & VM_PROT_WRITE)
1316 if (pmap_bootstrapped &&
1317 (m->oflags & VPO_UNMANAGED) == 0)
1318 vm_page_aflag_set(m, PGA_WRITEABLE);
1320 oldpvo = moea64_pvo_find_va(pmap, va);
1321 if (oldpvo != NULL) {
1322 if (oldpvo->pvo_vaddr == pvo->pvo_vaddr &&
1323 oldpvo->pvo_pte.pa == pvo->pvo_pte.pa &&
1324 oldpvo->pvo_pte.prot == prot) {
1325 /* Identical mapping already exists */
1328 /* If not in page table, reinsert it */
1329 if (MOEA64_PTE_SYNCH(mmu, oldpvo) < 0) {
1330 moea64_pte_overflow--;
1331 MOEA64_PTE_INSERT(mmu, oldpvo);
1334 /* Then just clean up and go home */
1337 free_pvo_entry(pvo);
1341 /* Otherwise, need to kill it first */
1342 KASSERT(oldpvo->pvo_pmap == pmap, ("pmap of old "
1343 "mapping does not match new mapping"));
1344 moea64_pvo_remove_from_pmap(mmu, oldpvo);
1346 error = moea64_pvo_enter(mmu, pvo, pvo_head);
1350 /* Free any dead pages */
1351 if (oldpvo != NULL) {
1352 PV_LOCK(oldpvo->pvo_pte.pa & LPTE_RPGN);
1353 moea64_pvo_remove_from_page(mmu, oldpvo);
1354 PV_UNLOCK(oldpvo->pvo_pte.pa & LPTE_RPGN);
1355 free_pvo_entry(oldpvo);
1358 if (error != ENOMEM)
1360 if ((flags & PMAP_ENTER_NOSLEEP) != 0)
1361 return (KERN_RESOURCE_SHORTAGE);
1362 VM_OBJECT_ASSERT_UNLOCKED(m->object);
1367 * Flush the page from the instruction cache if this page is
1368 * mapped executable and cacheable.
1370 if (pmap != kernel_pmap && !(m->aflags & PGA_EXECUTABLE) &&
1371 (pte_lo & (LPTE_I | LPTE_G | LPTE_NOEXEC)) == 0) {
1372 vm_page_aflag_set(m, PGA_EXECUTABLE);
1373 moea64_syncicache(mmu, pmap, va, VM_PAGE_TO_PHYS(m), PAGE_SIZE);
1375 return (KERN_SUCCESS);
1379 moea64_syncicache(mmu_t mmu, pmap_t pmap, vm_offset_t va, vm_paddr_t pa,
1384 * This is much trickier than on older systems because
1385 * we can't sync the icache on physical addresses directly
1386 * without a direct map. Instead we check a couple of cases
1387 * where the memory is already mapped in and, failing that,
1388 * use the same trick we use for page zeroing to create
1389 * a temporary mapping for this physical address.
1392 if (!pmap_bootstrapped) {
1394 * If PMAP is not bootstrapped, we are likely to be
1397 __syncicache((void *)pa, sz);
1398 } else if (pmap == kernel_pmap) {
1399 __syncicache((void *)va, sz);
1400 } else if (hw_direct_map) {
1401 __syncicache((void *)pa, sz);
1403 /* Use the scratch page to set up a temp mapping */
1405 mtx_lock(&moea64_scratchpage_mtx);
1407 moea64_set_scratchpage_pa(mmu, 1, pa & ~ADDR_POFF);
1408 __syncicache((void *)(moea64_scratchpage_va[1] +
1409 (va & ADDR_POFF)), sz);
1411 mtx_unlock(&moea64_scratchpage_mtx);
1416 * Maps a sequence of resident pages belonging to the same object.
1417 * The sequence begins with the given page m_start. This page is
1418 * mapped at the given virtual address start. Each subsequent page is
1419 * mapped at a virtual address that is offset from start by the same
1420 * amount as the page is offset from m_start within the object. The
1421 * last page in the sequence is the page with the largest offset from
1422 * m_start that can be mapped at a virtual address less than the given
1423 * virtual address end. Not every virtual page between start and end
1424 * is mapped; only those for which a resident page exists with the
1425 * corresponding offset from m_start are mapped.
1428 moea64_enter_object(mmu_t mmu, pmap_t pm, vm_offset_t start, vm_offset_t end,
1429 vm_page_t m_start, vm_prot_t prot)
1432 vm_pindex_t diff, psize;
1434 VM_OBJECT_ASSERT_LOCKED(m_start->object);
1436 psize = atop(end - start);
1438 while (m != NULL && (diff = m->pindex - m_start->pindex) < psize) {
1439 moea64_enter(mmu, pm, start + ptoa(diff), m, prot &
1440 (VM_PROT_READ | VM_PROT_EXECUTE), PMAP_ENTER_NOSLEEP, 0);
1441 m = TAILQ_NEXT(m, listq);
1446 moea64_enter_quick(mmu_t mmu, pmap_t pm, vm_offset_t va, vm_page_t m,
1450 moea64_enter(mmu, pm, va, m, prot & (VM_PROT_READ | VM_PROT_EXECUTE),
1451 PMAP_ENTER_NOSLEEP, 0);
1455 moea64_extract(mmu_t mmu, pmap_t pm, vm_offset_t va)
1457 struct pvo_entry *pvo;
1461 pvo = moea64_pvo_find_va(pm, va);
1465 pa = (pvo->pvo_pte.pa & LPTE_RPGN) | (va - PVO_VADDR(pvo));
1472 * Atomically extract and hold the physical page with the given
1473 * pmap and virtual address pair if that mapping permits the given
1477 moea64_extract_and_hold(mmu_t mmu, pmap_t pmap, vm_offset_t va, vm_prot_t prot)
1479 struct pvo_entry *pvo;
1487 pvo = moea64_pvo_find_va(pmap, va & ~ADDR_POFF);
1488 if (pvo != NULL && (pvo->pvo_pte.prot & prot) == prot) {
1489 if (vm_page_pa_tryrelock(pmap,
1490 pvo->pvo_pte.pa & LPTE_RPGN, &pa))
1492 m = PHYS_TO_VM_PAGE(pvo->pvo_pte.pa & LPTE_RPGN);
1500 static mmu_t installed_mmu;
1503 moea64_uma_page_alloc(uma_zone_t zone, vm_size_t bytes, uint8_t *flags,
1506 struct pvo_entry *pvo;
1509 int pflags, needed_lock;
1512 * This entire routine is a horrible hack to avoid bothering kmem
1513 * for new KVA addresses. Because this can get called from inside
1514 * kmem allocation routines, calling kmem for a new address here
1515 * can lead to multiply locking non-recursive mutexes.
1518 *flags = UMA_SLAB_PRIV;
1519 needed_lock = !PMAP_LOCKED(kernel_pmap);
1520 pflags = malloc2vm_flags(wait) | VM_ALLOC_WIRED;
1523 m = vm_page_alloc(NULL, 0, pflags | VM_ALLOC_NOOBJ);
1525 if (wait & M_NOWAIT)
1532 va = VM_PAGE_TO_PHYS(m);
1534 pvo = alloc_pvo_entry(1 /* bootstrap */);
1536 pvo->pvo_pte.prot = VM_PROT_READ | VM_PROT_WRITE;
1537 pvo->pvo_pte.pa = VM_PAGE_TO_PHYS(m) | LPTE_M;
1540 PMAP_LOCK(kernel_pmap);
1542 init_pvo_entry(pvo, kernel_pmap, va);
1543 pvo->pvo_vaddr |= PVO_WIRED;
1545 moea64_pvo_enter(installed_mmu, pvo, NULL);
1548 PMAP_UNLOCK(kernel_pmap);
1550 if ((wait & M_ZERO) && (m->flags & PG_ZERO) == 0)
1551 bzero((void *)va, PAGE_SIZE);
1556 extern int elf32_nxstack;
1559 moea64_init(mmu_t mmu)
1562 CTR0(KTR_PMAP, "moea64_init");
1564 moea64_pvo_zone = uma_zcreate("UPVO entry", sizeof (struct pvo_entry),
1565 NULL, NULL, NULL, NULL, UMA_ALIGN_PTR,
1566 UMA_ZONE_VM | UMA_ZONE_NOFREE);
1568 if (!hw_direct_map) {
1569 installed_mmu = mmu;
1570 uma_zone_set_allocf(moea64_pvo_zone,moea64_uma_page_alloc);
1573 #ifdef COMPAT_FREEBSD32
1577 moea64_initialized = TRUE;
1581 moea64_is_referenced(mmu_t mmu, vm_page_t m)
1584 KASSERT((m->oflags & VPO_UNMANAGED) == 0,
1585 ("moea64_is_referenced: page %p is not managed", m));
1587 return (moea64_query_bit(mmu, m, LPTE_REF));
1591 moea64_is_modified(mmu_t mmu, vm_page_t m)
1594 KASSERT((m->oflags & VPO_UNMANAGED) == 0,
1595 ("moea64_is_modified: page %p is not managed", m));
1598 * If the page is not exclusive busied, then PGA_WRITEABLE cannot be
1599 * concurrently set while the object is locked. Thus, if PGA_WRITEABLE
1600 * is clear, no PTEs can have LPTE_CHG set.
1602 VM_OBJECT_ASSERT_LOCKED(m->object);
1603 if (!vm_page_xbusied(m) && (m->aflags & PGA_WRITEABLE) == 0)
1605 return (moea64_query_bit(mmu, m, LPTE_CHG));
1609 moea64_is_prefaultable(mmu_t mmu, pmap_t pmap, vm_offset_t va)
1611 struct pvo_entry *pvo;
1612 boolean_t rv = TRUE;
1615 pvo = moea64_pvo_find_va(pmap, va & ~ADDR_POFF);
1623 moea64_clear_modify(mmu_t mmu, vm_page_t m)
1626 KASSERT((m->oflags & VPO_UNMANAGED) == 0,
1627 ("moea64_clear_modify: page %p is not managed", m));
1628 VM_OBJECT_ASSERT_WLOCKED(m->object);
1629 KASSERT(!vm_page_xbusied(m),
1630 ("moea64_clear_modify: page %p is exclusive busied", m));
1633 * If the page is not PGA_WRITEABLE, then no PTEs can have LPTE_CHG
1634 * set. If the object containing the page is locked and the page is
1635 * not exclusive busied, then PGA_WRITEABLE cannot be concurrently set.
1637 if ((m->aflags & PGA_WRITEABLE) == 0)
1639 moea64_clear_bit(mmu, m, LPTE_CHG);
1643 * Clear the write and modified bits in each of the given page's mappings.
1646 moea64_remove_write(mmu_t mmu, vm_page_t m)
1648 struct pvo_entry *pvo;
1649 int64_t refchg, ret;
1652 KASSERT((m->oflags & VPO_UNMANAGED) == 0,
1653 ("moea64_remove_write: page %p is not managed", m));
1656 * If the page is not exclusive busied, then PGA_WRITEABLE cannot be
1657 * set by another thread while the object is locked. Thus,
1658 * if PGA_WRITEABLE is clear, no page table entries need updating.
1660 VM_OBJECT_ASSERT_WLOCKED(m->object);
1661 if (!vm_page_xbusied(m) && (m->aflags & PGA_WRITEABLE) == 0)
1666 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) {
1667 pmap = pvo->pvo_pmap;
1669 if (!(pvo->pvo_vaddr & PVO_DEAD) &&
1670 (pvo->pvo_pte.prot & VM_PROT_WRITE)) {
1671 pvo->pvo_pte.prot &= ~VM_PROT_WRITE;
1672 ret = MOEA64_PTE_REPLACE(mmu, pvo,
1673 MOEA64_PTE_PROT_UPDATE);
1677 if (pvo->pvo_pmap == kernel_pmap)
1682 if ((refchg | atomic_readandclear_32(&m->md.mdpg_attrs)) & LPTE_CHG)
1684 vm_page_aflag_clear(m, PGA_WRITEABLE);
1689 * moea64_ts_referenced:
1691 * Return a count of reference bits for a page, clearing those bits.
1692 * It is not necessary for every reference bit to be cleared, but it
1693 * is necessary that 0 only be returned when there are truly no
1694 * reference bits set.
1696 * XXX: The exact number of bits to check and clear is a matter that
1697 * should be tested and standardized at some point in the future for
1698 * optimal aging of shared pages.
1701 moea64_ts_referenced(mmu_t mmu, vm_page_t m)
1704 KASSERT((m->oflags & VPO_UNMANAGED) == 0,
1705 ("moea64_ts_referenced: page %p is not managed", m));
1706 return (moea64_clear_bit(mmu, m, LPTE_REF));
1710 * Modify the WIMG settings of all mappings for a page.
1713 moea64_page_set_memattr(mmu_t mmu, vm_page_t m, vm_memattr_t ma)
1715 struct pvo_entry *pvo;
1720 if ((m->oflags & VPO_UNMANAGED) != 0) {
1721 m->md.mdpg_cache_attrs = ma;
1725 lo = moea64_calc_wimg(VM_PAGE_TO_PHYS(m), ma);
1728 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) {
1729 pmap = pvo->pvo_pmap;
1731 if (!(pvo->pvo_vaddr & PVO_DEAD)) {
1732 pvo->pvo_pte.pa &= ~LPTE_WIMG;
1733 pvo->pvo_pte.pa |= lo;
1734 refchg = MOEA64_PTE_REPLACE(mmu, pvo,
1735 MOEA64_PTE_INVALIDATE);
1737 refchg = (pvo->pvo_pte.prot & VM_PROT_WRITE) ?
1739 if ((pvo->pvo_vaddr & PVO_MANAGED) &&
1740 (pvo->pvo_pte.prot & VM_PROT_WRITE)) {
1742 atomic_readandclear_32(&m->md.mdpg_attrs);
1743 if (refchg & LPTE_CHG)
1745 if (refchg & LPTE_REF)
1746 vm_page_aflag_set(m, PGA_REFERENCED);
1748 if (pvo->pvo_pmap == kernel_pmap)
1753 m->md.mdpg_cache_attrs = ma;
1758 * Map a wired page into kernel virtual address space.
1761 moea64_kenter_attr(mmu_t mmu, vm_offset_t va, vm_paddr_t pa, vm_memattr_t ma)
1764 struct pvo_entry *pvo, *oldpvo;
1766 pvo = alloc_pvo_entry(0);
1767 pvo->pvo_pte.prot = VM_PROT_READ | VM_PROT_WRITE | VM_PROT_EXECUTE;
1768 pvo->pvo_pte.pa = (pa & ~ADDR_POFF) | moea64_calc_wimg(pa, ma);
1769 pvo->pvo_vaddr |= PVO_WIRED;
1771 PMAP_LOCK(kernel_pmap);
1772 oldpvo = moea64_pvo_find_va(kernel_pmap, va);
1774 moea64_pvo_remove_from_pmap(mmu, oldpvo);
1775 init_pvo_entry(pvo, kernel_pmap, va);
1776 error = moea64_pvo_enter(mmu, pvo, NULL);
1777 PMAP_UNLOCK(kernel_pmap);
1779 /* Free any dead pages */
1780 if (oldpvo != NULL) {
1781 PV_LOCK(oldpvo->pvo_pte.pa & LPTE_RPGN);
1782 moea64_pvo_remove_from_page(mmu, oldpvo);
1783 PV_UNLOCK(oldpvo->pvo_pte.pa & LPTE_RPGN);
1784 free_pvo_entry(oldpvo);
1787 if (error != 0 && error != ENOENT)
1788 panic("moea64_kenter: failed to enter va %#zx pa %#zx: %d", va,
1793 moea64_kenter(mmu_t mmu, vm_offset_t va, vm_paddr_t pa)
1796 moea64_kenter_attr(mmu, va, pa, VM_MEMATTR_DEFAULT);
1800 * Extract the physical page address associated with the given kernel virtual
1804 moea64_kextract(mmu_t mmu, vm_offset_t va)
1806 struct pvo_entry *pvo;
1810 * Shortcut the direct-mapped case when applicable. We never put
1811 * anything but 1:1 mappings below VM_MIN_KERNEL_ADDRESS.
1813 if (va < VM_MIN_KERNEL_ADDRESS)
1816 PMAP_LOCK(kernel_pmap);
1817 pvo = moea64_pvo_find_va(kernel_pmap, va);
1818 KASSERT(pvo != NULL, ("moea64_kextract: no addr found for %#" PRIxPTR,
1820 pa = (pvo->pvo_pte.pa & LPTE_RPGN) | (va - PVO_VADDR(pvo));
1821 PMAP_UNLOCK(kernel_pmap);
1826 * Remove a wired page from kernel virtual address space.
1829 moea64_kremove(mmu_t mmu, vm_offset_t va)
1831 moea64_remove(mmu, kernel_pmap, va, va + PAGE_SIZE);
1835 * Map a range of physical addresses into kernel virtual address space.
1837 * The value passed in *virt is a suggested virtual address for the mapping.
1838 * Architectures which can support a direct-mapped physical to virtual region
1839 * can return the appropriate address within that region, leaving '*virt'
1840 * unchanged. Other architectures should map the pages starting at '*virt' and
1841 * update '*virt' with the first usable address after the mapped region.
1844 moea64_map(mmu_t mmu, vm_offset_t *virt, vm_paddr_t pa_start,
1845 vm_paddr_t pa_end, int prot)
1847 vm_offset_t sva, va;
1849 if (hw_direct_map) {
1851 * Check if every page in the region is covered by the direct
1852 * map. The direct map covers all of physical memory. Use
1853 * moea64_calc_wimg() as a shortcut to see if the page is in
1854 * physical memory as a way to see if the direct map covers it.
1856 for (va = pa_start; va < pa_end; va += PAGE_SIZE)
1857 if (moea64_calc_wimg(va, VM_MEMATTR_DEFAULT) != LPTE_M)
1864 /* XXX respect prot argument */
1865 for (; pa_start < pa_end; pa_start += PAGE_SIZE, va += PAGE_SIZE)
1866 moea64_kenter(mmu, va, pa_start);
1873 * Returns true if the pmap's pv is one of the first
1874 * 16 pvs linked to from this page. This count may
1875 * be changed upwards or downwards in the future; it
1876 * is only necessary that true be returned for a small
1877 * subset of pmaps for proper page aging.
1880 moea64_page_exists_quick(mmu_t mmu, pmap_t pmap, vm_page_t m)
1883 struct pvo_entry *pvo;
1886 KASSERT((m->oflags & VPO_UNMANAGED) == 0,
1887 ("moea64_page_exists_quick: page %p is not managed", m));
1891 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) {
1892 if (!(pvo->pvo_vaddr & PVO_DEAD) && pvo->pvo_pmap == pmap) {
1904 moea64_page_init(mmu_t mmu __unused, vm_page_t m)
1907 m->md.mdpg_attrs = 0;
1908 m->md.mdpg_cache_attrs = VM_MEMATTR_DEFAULT;
1909 LIST_INIT(&m->md.mdpg_pvoh);
1913 * Return the number of managed mappings to the given physical page
1917 moea64_page_wired_mappings(mmu_t mmu, vm_page_t m)
1919 struct pvo_entry *pvo;
1923 if ((m->oflags & VPO_UNMANAGED) != 0)
1926 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink)
1927 if ((pvo->pvo_vaddr & (PVO_DEAD | PVO_WIRED)) == PVO_WIRED)
1933 static uintptr_t moea64_vsidcontext;
1936 moea64_get_unique_vsid(void) {
1943 __asm __volatile("mftb %0" : "=r"(entropy));
1945 mtx_lock(&moea64_slb_mutex);
1946 for (i = 0; i < NVSIDS; i += VSID_NBPW) {
1950 * Create a new value by mutiplying by a prime and adding in
1951 * entropy from the timebase register. This is to make the
1952 * VSID more random so that the PT hash function collides
1953 * less often. (Note that the prime casues gcc to do shifts
1954 * instead of a multiply.)
1956 moea64_vsidcontext = (moea64_vsidcontext * 0x1105) + entropy;
1957 hash = moea64_vsidcontext & (NVSIDS - 1);
1958 if (hash == 0) /* 0 is special, avoid it */
1961 mask = 1 << (hash & (VSID_NBPW - 1));
1962 hash = (moea64_vsidcontext & VSID_HASHMASK);
1963 if (moea64_vsid_bitmap[n] & mask) { /* collision? */
1964 /* anything free in this bucket? */
1965 if (moea64_vsid_bitmap[n] == 0xffffffff) {
1966 entropy = (moea64_vsidcontext >> 20);
1969 i = ffs(~moea64_vsid_bitmap[n]) - 1;
1971 hash &= rounddown2(VSID_HASHMASK, VSID_NBPW);
1974 if (hash == VSID_VRMA) /* also special, avoid this too */
1976 KASSERT(!(moea64_vsid_bitmap[n] & mask),
1977 ("Allocating in-use VSID %#zx\n", hash));
1978 moea64_vsid_bitmap[n] |= mask;
1979 mtx_unlock(&moea64_slb_mutex);
1983 mtx_unlock(&moea64_slb_mutex);
1984 panic("%s: out of segments",__func__);
1987 #ifdef __powerpc64__
1989 moea64_pinit(mmu_t mmu, pmap_t pmap)
1992 RB_INIT(&pmap->pmap_pvo);
1994 pmap->pm_slb_tree_root = slb_alloc_tree();
1995 pmap->pm_slb = slb_alloc_user_cache();
1996 pmap->pm_slb_len = 0;
2000 moea64_pinit(mmu_t mmu, pmap_t pmap)
2005 RB_INIT(&pmap->pmap_pvo);
2007 if (pmap_bootstrapped)
2008 pmap->pmap_phys = (pmap_t)moea64_kextract(mmu,
2011 pmap->pmap_phys = pmap;
2014 * Allocate some segment registers for this pmap.
2016 hash = moea64_get_unique_vsid();
2018 for (i = 0; i < 16; i++)
2019 pmap->pm_sr[i] = VSID_MAKE(i, hash);
2021 KASSERT(pmap->pm_sr[0] != 0, ("moea64_pinit: pm_sr[0] = 0"));
2026 * Initialize the pmap associated with process 0.
2029 moea64_pinit0(mmu_t mmu, pmap_t pm)
2033 moea64_pinit(mmu, pm);
2034 bzero(&pm->pm_stats, sizeof(pm->pm_stats));
2038 * Set the physical protection on the specified range of this map as requested.
2041 moea64_pvo_protect(mmu_t mmu, pmap_t pm, struct pvo_entry *pvo, vm_prot_t prot)
2047 PMAP_LOCK_ASSERT(pm, MA_OWNED);
2050 * Change the protection of the page.
2052 oldprot = pvo->pvo_pte.prot;
2053 pvo->pvo_pte.prot = prot;
2054 pg = PHYS_TO_VM_PAGE(pvo->pvo_pte.pa & LPTE_RPGN);
2057 * If the PVO is in the page table, update mapping
2059 refchg = MOEA64_PTE_REPLACE(mmu, pvo, MOEA64_PTE_PROT_UPDATE);
2061 refchg = (oldprot & VM_PROT_WRITE) ? LPTE_CHG : 0;
2063 if (pm != kernel_pmap && pg != NULL && !(pg->aflags & PGA_EXECUTABLE) &&
2064 (pvo->pvo_pte.pa & (LPTE_I | LPTE_G | LPTE_NOEXEC)) == 0) {
2065 if ((pg->oflags & VPO_UNMANAGED) == 0)
2066 vm_page_aflag_set(pg, PGA_EXECUTABLE);
2067 moea64_syncicache(mmu, pm, PVO_VADDR(pvo),
2068 pvo->pvo_pte.pa & LPTE_RPGN, PAGE_SIZE);
2072 * Update vm about the REF/CHG bits if the page is managed and we have
2073 * removed write access.
2075 if (pg != NULL && (pvo->pvo_vaddr & PVO_MANAGED) &&
2076 (oldprot & VM_PROT_WRITE)) {
2077 refchg |= atomic_readandclear_32(&pg->md.mdpg_attrs);
2078 if (refchg & LPTE_CHG)
2080 if (refchg & LPTE_REF)
2081 vm_page_aflag_set(pg, PGA_REFERENCED);
2086 moea64_protect(mmu_t mmu, pmap_t pm, vm_offset_t sva, vm_offset_t eva,
2089 struct pvo_entry *pvo, *tpvo, key;
2091 CTR4(KTR_PMAP, "moea64_protect: pm=%p sva=%#x eva=%#x prot=%#x", pm,
2094 KASSERT(pm == &curproc->p_vmspace->vm_pmap || pm == kernel_pmap,
2095 ("moea64_protect: non current pmap"));
2097 if ((prot & VM_PROT_READ) == VM_PROT_NONE) {
2098 moea64_remove(mmu, pm, sva, eva);
2103 key.pvo_vaddr = sva;
2104 for (pvo = RB_NFIND(pvo_tree, &pm->pmap_pvo, &key);
2105 pvo != NULL && PVO_VADDR(pvo) < eva; pvo = tpvo) {
2106 tpvo = RB_NEXT(pvo_tree, &pm->pmap_pvo, pvo);
2107 moea64_pvo_protect(mmu, pm, pvo, prot);
2113 * Map a list of wired pages into kernel virtual address space. This is
2114 * intended for temporary mappings which do not need page modification or
2115 * references recorded. Existing mappings in the region are overwritten.
2118 moea64_qenter(mmu_t mmu, vm_offset_t va, vm_page_t *m, int count)
2120 while (count-- > 0) {
2121 moea64_kenter(mmu, va, VM_PAGE_TO_PHYS(*m));
2128 * Remove page mappings from kernel virtual address space. Intended for
2129 * temporary mappings entered by moea64_qenter.
2132 moea64_qremove(mmu_t mmu, vm_offset_t va, int count)
2134 while (count-- > 0) {
2135 moea64_kremove(mmu, va);
2141 moea64_release_vsid(uint64_t vsid)
2145 mtx_lock(&moea64_slb_mutex);
2146 idx = vsid & (NVSIDS-1);
2147 mask = 1 << (idx % VSID_NBPW);
2149 KASSERT(moea64_vsid_bitmap[idx] & mask,
2150 ("Freeing unallocated VSID %#jx", vsid));
2151 moea64_vsid_bitmap[idx] &= ~mask;
2152 mtx_unlock(&moea64_slb_mutex);
2157 moea64_release(mmu_t mmu, pmap_t pmap)
2161 * Free segment registers' VSIDs
2163 #ifdef __powerpc64__
2164 slb_free_tree(pmap);
2165 slb_free_user_cache(pmap->pm_slb);
2167 KASSERT(pmap->pm_sr[0] != 0, ("moea64_release: pm_sr[0] = 0"));
2169 moea64_release_vsid(VSID_TO_HASH(pmap->pm_sr[0]));
2174 * Remove all pages mapped by the specified pmap
2177 moea64_remove_pages(mmu_t mmu, pmap_t pm)
2179 struct pvo_entry *pvo, *tpvo;
2180 struct pvo_tree tofree;
2185 RB_FOREACH_SAFE(pvo, pvo_tree, &pm->pmap_pvo, tpvo) {
2186 if (pvo->pvo_vaddr & PVO_WIRED)
2190 * For locking reasons, remove this from the page table and
2191 * pmap, but save delinking from the vm_page for a second
2194 moea64_pvo_remove_from_pmap(mmu, pvo);
2195 RB_INSERT(pvo_tree, &tofree, pvo);
2199 RB_FOREACH_SAFE(pvo, pvo_tree, &tofree, tpvo) {
2200 PV_LOCK(pvo->pvo_pte.pa & LPTE_RPGN);
2201 moea64_pvo_remove_from_page(mmu, pvo);
2202 PV_UNLOCK(pvo->pvo_pte.pa & LPTE_RPGN);
2203 RB_REMOVE(pvo_tree, &tofree, pvo);
2204 free_pvo_entry(pvo);
2209 * Remove the given range of addresses from the specified map.
2212 moea64_remove(mmu_t mmu, pmap_t pm, vm_offset_t sva, vm_offset_t eva)
2214 struct pvo_entry *pvo, *tpvo, key;
2215 struct pvo_tree tofree;
2218 * Perform an unsynchronized read. This is, however, safe.
2220 if (pm->pm_stats.resident_count == 0)
2223 key.pvo_vaddr = sva;
2228 for (pvo = RB_NFIND(pvo_tree, &pm->pmap_pvo, &key);
2229 pvo != NULL && PVO_VADDR(pvo) < eva; pvo = tpvo) {
2230 tpvo = RB_NEXT(pvo_tree, &pm->pmap_pvo, pvo);
2233 * For locking reasons, remove this from the page table and
2234 * pmap, but save delinking from the vm_page for a second
2237 moea64_pvo_remove_from_pmap(mmu, pvo);
2238 RB_INSERT(pvo_tree, &tofree, pvo);
2242 RB_FOREACH_SAFE(pvo, pvo_tree, &tofree, tpvo) {
2243 PV_LOCK(pvo->pvo_pte.pa & LPTE_RPGN);
2244 moea64_pvo_remove_from_page(mmu, pvo);
2245 PV_UNLOCK(pvo->pvo_pte.pa & LPTE_RPGN);
2246 RB_REMOVE(pvo_tree, &tofree, pvo);
2247 free_pvo_entry(pvo);
2252 * Remove physical page from all pmaps in which it resides. moea64_pvo_remove()
2253 * will reflect changes in pte's back to the vm_page.
2256 moea64_remove_all(mmu_t mmu, vm_page_t m)
2258 struct pvo_entry *pvo, *next_pvo;
2259 struct pvo_head freequeue;
2263 LIST_INIT(&freequeue);
2266 LIST_FOREACH_SAFE(pvo, vm_page_to_pvoh(m), pvo_vlink, next_pvo) {
2267 pmap = pvo->pvo_pmap;
2269 wasdead = (pvo->pvo_vaddr & PVO_DEAD);
2271 moea64_pvo_remove_from_pmap(mmu, pvo);
2272 moea64_pvo_remove_from_page(mmu, pvo);
2274 LIST_INSERT_HEAD(&freequeue, pvo, pvo_vlink);
2278 KASSERT(!pmap_page_is_mapped(m), ("Page still has mappings"));
2279 KASSERT(!(m->aflags & PGA_WRITEABLE), ("Page still writable"));
2282 /* Clean up UMA allocations */
2283 LIST_FOREACH_SAFE(pvo, &freequeue, pvo_vlink, next_pvo)
2284 free_pvo_entry(pvo);
2288 * Allocate a physical page of memory directly from the phys_avail map.
2289 * Can only be called from moea64_bootstrap before avail start and end are
2293 moea64_bootstrap_alloc(vm_size_t size, u_int align)
2298 size = round_page(size);
2299 for (i = 0; phys_avail[i + 1] != 0; i += 2) {
2301 s = roundup2(phys_avail[i], align);
2306 if (s < phys_avail[i] || e > phys_avail[i + 1])
2309 if (s + size > platform_real_maxaddr())
2312 if (s == phys_avail[i]) {
2313 phys_avail[i] += size;
2314 } else if (e == phys_avail[i + 1]) {
2315 phys_avail[i + 1] -= size;
2317 for (j = phys_avail_count * 2; j > i; j -= 2) {
2318 phys_avail[j] = phys_avail[j - 2];
2319 phys_avail[j + 1] = phys_avail[j - 1];
2322 phys_avail[i + 3] = phys_avail[i + 1];
2323 phys_avail[i + 1] = s;
2324 phys_avail[i + 2] = e;
2330 panic("moea64_bootstrap_alloc: could not allocate memory");
2334 moea64_pvo_enter(mmu_t mmu, struct pvo_entry *pvo, struct pvo_head *pvo_head)
2338 PMAP_LOCK_ASSERT(pvo->pvo_pmap, MA_OWNED);
2339 KASSERT(moea64_pvo_find_va(pvo->pvo_pmap, PVO_VADDR(pvo)) == NULL,
2340 ("Existing mapping for VA %#jx", (uintmax_t)PVO_VADDR(pvo)));
2342 moea64_pvo_enter_calls++;
2347 RB_INSERT(pvo_tree, &pvo->pvo_pmap->pmap_pvo, pvo);
2350 * Remember if the list was empty and therefore will be the first
2353 if (pvo_head != NULL) {
2354 if (LIST_FIRST(pvo_head) == NULL)
2356 LIST_INSERT_HEAD(pvo_head, pvo, pvo_vlink);
2359 if (pvo->pvo_vaddr & PVO_WIRED)
2360 pvo->pvo_pmap->pm_stats.wired_count++;
2361 pvo->pvo_pmap->pm_stats.resident_count++;
2364 * Insert it into the hardware page table
2366 err = MOEA64_PTE_INSERT(mmu, pvo);
2368 panic("moea64_pvo_enter: overflow");
2371 moea64_pvo_entries++;
2373 if (pvo->pvo_pmap == kernel_pmap)
2376 #ifdef __powerpc64__
2378 * Make sure all our bootstrap mappings are in the SLB as soon
2379 * as virtual memory is switched on.
2381 if (!pmap_bootstrapped)
2382 moea64_bootstrap_slb_prefault(PVO_VADDR(pvo),
2383 pvo->pvo_vaddr & PVO_LARGE);
2386 return (first ? ENOENT : 0);
2390 moea64_pvo_remove_from_pmap(mmu_t mmu, struct pvo_entry *pvo)
2395 KASSERT(pvo->pvo_pmap != NULL, ("Trying to remove PVO with no pmap"));
2396 PMAP_LOCK_ASSERT(pvo->pvo_pmap, MA_OWNED);
2397 KASSERT(!(pvo->pvo_vaddr & PVO_DEAD), ("Trying to remove dead PVO"));
2400 * If there is an active pte entry, we need to deactivate it
2402 refchg = MOEA64_PTE_UNSET(mmu, pvo);
2405 * If it was evicted from the page table, be pessimistic and
2408 if (pvo->pvo_pte.prot & VM_PROT_WRITE)
2415 * Update our statistics.
2417 pvo->pvo_pmap->pm_stats.resident_count--;
2418 if (pvo->pvo_vaddr & PVO_WIRED)
2419 pvo->pvo_pmap->pm_stats.wired_count--;
2422 * Remove this PVO from the pmap list.
2424 RB_REMOVE(pvo_tree, &pvo->pvo_pmap->pmap_pvo, pvo);
2427 * Mark this for the next sweep
2429 pvo->pvo_vaddr |= PVO_DEAD;
2431 /* Send RC bits to VM */
2432 if ((pvo->pvo_vaddr & PVO_MANAGED) &&
2433 (pvo->pvo_pte.prot & VM_PROT_WRITE)) {
2434 pg = PHYS_TO_VM_PAGE(pvo->pvo_pte.pa & LPTE_RPGN);
2436 refchg |= atomic_readandclear_32(&pg->md.mdpg_attrs);
2437 if (refchg & LPTE_CHG)
2439 if (refchg & LPTE_REF)
2440 vm_page_aflag_set(pg, PGA_REFERENCED);
2446 moea64_pvo_remove_from_page(mmu_t mmu, struct pvo_entry *pvo)
2450 KASSERT(pvo->pvo_vaddr & PVO_DEAD, ("Trying to delink live page"));
2452 /* Use NULL pmaps as a sentinel for races in page deletion */
2453 if (pvo->pvo_pmap == NULL)
2455 pvo->pvo_pmap = NULL;
2458 * Update vm about page writeability/executability if managed
2460 PV_LOCKASSERT(pvo->pvo_pte.pa & LPTE_RPGN);
2461 pg = PHYS_TO_VM_PAGE(pvo->pvo_pte.pa & LPTE_RPGN);
2463 if ((pvo->pvo_vaddr & PVO_MANAGED) && pg != NULL) {
2464 LIST_REMOVE(pvo, pvo_vlink);
2465 if (LIST_EMPTY(vm_page_to_pvoh(pg)))
2466 vm_page_aflag_clear(pg, PGA_WRITEABLE | PGA_EXECUTABLE);
2469 moea64_pvo_entries--;
2470 moea64_pvo_remove_calls++;
2473 static struct pvo_entry *
2474 moea64_pvo_find_va(pmap_t pm, vm_offset_t va)
2476 struct pvo_entry key;
2478 PMAP_LOCK_ASSERT(pm, MA_OWNED);
2480 key.pvo_vaddr = va & ~ADDR_POFF;
2481 return (RB_FIND(pvo_tree, &pm->pmap_pvo, &key));
2485 moea64_query_bit(mmu_t mmu, vm_page_t m, uint64_t ptebit)
2487 struct pvo_entry *pvo;
2492 * See if this bit is stored in the page already.
2494 if (m->md.mdpg_attrs & ptebit)
2498 * Examine each PTE. Sync so that any pending REF/CHG bits are
2499 * flushed to the PTEs.
2504 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) {
2508 * See if this pvo has a valid PTE. if so, fetch the
2509 * REF/CHG bits from the valid PTE. If the appropriate
2510 * ptebit is set, return success.
2512 PMAP_LOCK(pvo->pvo_pmap);
2513 if (!(pvo->pvo_vaddr & PVO_DEAD))
2514 ret = MOEA64_PTE_SYNCH(mmu, pvo);
2515 PMAP_UNLOCK(pvo->pvo_pmap);
2518 atomic_set_32(&m->md.mdpg_attrs,
2519 ret & (LPTE_CHG | LPTE_REF));
2532 moea64_clear_bit(mmu_t mmu, vm_page_t m, u_int64_t ptebit)
2535 struct pvo_entry *pvo;
2539 * Sync so that any pending REF/CHG bits are flushed to the PTEs (so
2540 * we can reset the right ones).
2545 * For each pvo entry, clear the pte's ptebit.
2549 LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) {
2552 PMAP_LOCK(pvo->pvo_pmap);
2553 if (!(pvo->pvo_vaddr & PVO_DEAD))
2554 ret = MOEA64_PTE_CLEAR(mmu, pvo, ptebit);
2555 PMAP_UNLOCK(pvo->pvo_pmap);
2557 if (ret > 0 && (ret & ptebit))
2560 atomic_clear_32(&m->md.mdpg_attrs, ptebit);
2567 moea64_dev_direct_mapped(mmu_t mmu, vm_paddr_t pa, vm_size_t size)
2569 struct pvo_entry *pvo, key;
2573 PMAP_LOCK(kernel_pmap);
2574 key.pvo_vaddr = ppa = pa & ~ADDR_POFF;
2575 for (pvo = RB_FIND(pvo_tree, &kernel_pmap->pmap_pvo, &key);
2576 ppa < pa + size; ppa += PAGE_SIZE,
2577 pvo = RB_NEXT(pvo_tree, &kernel_pmap->pmap_pvo, pvo)) {
2578 if (pvo == NULL || (pvo->pvo_pte.pa & LPTE_RPGN) != ppa) {
2583 PMAP_UNLOCK(kernel_pmap);
2589 * Map a set of physical memory pages into the kernel virtual
2590 * address space. Return a pointer to where it is mapped. This
2591 * routine is intended to be used for mapping device memory,
2595 moea64_mapdev_attr(mmu_t mmu, vm_paddr_t pa, vm_size_t size, vm_memattr_t ma)
2597 vm_offset_t va, tmpva, ppa, offset;
2599 ppa = trunc_page(pa);
2600 offset = pa & PAGE_MASK;
2601 size = roundup2(offset + size, PAGE_SIZE);
2603 va = kva_alloc(size);
2606 panic("moea64_mapdev: Couldn't alloc kernel virtual memory");
2608 for (tmpva = va; size > 0;) {
2609 moea64_kenter_attr(mmu, tmpva, ppa, ma);
2615 return ((void *)(va + offset));
2619 moea64_mapdev(mmu_t mmu, vm_paddr_t pa, vm_size_t size)
2622 return moea64_mapdev_attr(mmu, pa, size, VM_MEMATTR_DEFAULT);
2626 moea64_unmapdev(mmu_t mmu, vm_offset_t va, vm_size_t size)
2628 vm_offset_t base, offset;
2630 base = trunc_page(va);
2631 offset = va & PAGE_MASK;
2632 size = roundup2(offset + size, PAGE_SIZE);
2634 kva_free(base, size);
2638 moea64_sync_icache(mmu_t mmu, pmap_t pm, vm_offset_t va, vm_size_t sz)
2640 struct pvo_entry *pvo;
2647 lim = round_page(va);
2648 len = MIN(lim - va, sz);
2649 pvo = moea64_pvo_find_va(pm, va & ~ADDR_POFF);
2650 if (pvo != NULL && !(pvo->pvo_pte.pa & LPTE_I)) {
2651 pa = (pvo->pvo_pte.pa & LPTE_RPGN) | (va & ADDR_POFF);
2652 moea64_syncicache(mmu, pm, va, pa, len);
2661 moea64_dumpsys_map(mmu_t mmu, vm_paddr_t pa, size_t sz, void **va)
2667 extern struct dump_pa dump_map[PHYS_AVAIL_SZ + 1];
2670 moea64_scan_init(mmu_t mmu)
2672 struct pvo_entry *pvo;
2677 /* Initialize phys. segments for dumpsys(). */
2678 memset(&dump_map, 0, sizeof(dump_map));
2679 mem_regions(&pregions, &pregions_sz, ®ions, ®ions_sz);
2680 for (i = 0; i < pregions_sz; i++) {
2681 dump_map[i].pa_start = pregions[i].mr_start;
2682 dump_map[i].pa_size = pregions[i].mr_size;
2687 /* Virtual segments for minidumps: */
2688 memset(&dump_map, 0, sizeof(dump_map));
2690 /* 1st: kernel .data and .bss. */
2691 dump_map[0].pa_start = trunc_page((uintptr_t)_etext);
2692 dump_map[0].pa_size = round_page((uintptr_t)_end) -
2693 dump_map[0].pa_start;
2695 /* 2nd: msgbuf and tables (see pmap_bootstrap()). */
2696 dump_map[1].pa_start = (vm_paddr_t)msgbufp->msg_ptr;
2697 dump_map[1].pa_size = round_page(msgbufp->msg_size);
2699 /* 3rd: kernel VM. */
2700 va = dump_map[1].pa_start + dump_map[1].pa_size;
2701 /* Find start of next chunk (from va). */
2702 while (va < virtual_end) {
2703 /* Don't dump the buffer cache. */
2704 if (va >= kmi.buffer_sva && va < kmi.buffer_eva) {
2705 va = kmi.buffer_eva;
2708 pvo = moea64_pvo_find_va(kernel_pmap, va & ~ADDR_POFF);
2709 if (pvo != NULL && !(pvo->pvo_vaddr & PVO_DEAD))
2713 if (va < virtual_end) {
2714 dump_map[2].pa_start = va;
2716 /* Find last page in chunk. */
2717 while (va < virtual_end) {
2718 /* Don't run into the buffer cache. */
2719 if (va == kmi.buffer_sva)
2721 pvo = moea64_pvo_find_va(kernel_pmap, va & ~ADDR_POFF);
2722 if (pvo != NULL && !(pvo->pvo_vaddr & PVO_DEAD))
2726 dump_map[2].pa_size = va - dump_map[2].pa_start;