mmu_oea.c revision 97385
177957Sbenno/* 290643Sbenno * Copyright (c) 2001 The NetBSD Foundation, Inc. 390643Sbenno * All rights reserved. 490643Sbenno * 590643Sbenno * This code is derived from software contributed to The NetBSD Foundation 690643Sbenno * by Matt Thomas <matt@3am-software.com> of Allegro Networks, Inc. 790643Sbenno * 890643Sbenno * Redistribution and use in source and binary forms, with or without 990643Sbenno * modification, are permitted provided that the following conditions 1090643Sbenno * are met: 1190643Sbenno * 1. Redistributions of source code must retain the above copyright 1290643Sbenno * notice, this list of conditions and the following disclaimer. 1390643Sbenno * 2. Redistributions in binary form must reproduce the above copyright 1490643Sbenno * notice, this list of conditions and the following disclaimer in the 1590643Sbenno * documentation and/or other materials provided with the distribution. 1690643Sbenno * 3. All advertising materials mentioning features or use of this software 1790643Sbenno * must display the following acknowledgement: 1890643Sbenno * This product includes software developed by the NetBSD 1990643Sbenno * Foundation, Inc. and its contributors. 2090643Sbenno * 4. Neither the name of The NetBSD Foundation nor the names of its 2190643Sbenno * contributors may be used to endorse or promote products derived 2290643Sbenno * from this software without specific prior written permission. 2390643Sbenno * 2490643Sbenno * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 2590643Sbenno * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 2690643Sbenno * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 2790643Sbenno * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 2890643Sbenno * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 2990643Sbenno * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 3090643Sbenno * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 3190643Sbenno * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 3290643Sbenno * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 3390643Sbenno * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 3490643Sbenno * POSSIBILITY OF SUCH DAMAGE. 3590643Sbenno */ 3690643Sbenno/* 3777957Sbenno * Copyright (C) 1995, 1996 Wolfgang Solfrank. 3877957Sbenno * Copyright (C) 1995, 1996 TooLs GmbH. 3977957Sbenno * All rights reserved. 4077957Sbenno * 4177957Sbenno * Redistribution and use in source and binary forms, with or without 4277957Sbenno * modification, are permitted provided that the following conditions 4377957Sbenno * are met: 4477957Sbenno * 1. Redistributions of source code must retain the above copyright 4577957Sbenno * notice, this list of conditions and the following disclaimer. 4677957Sbenno * 2. Redistributions in binary form must reproduce the above copyright 4777957Sbenno * notice, this list of conditions and the following disclaimer in the 4877957Sbenno * documentation and/or other materials provided with the distribution. 4977957Sbenno * 3. All advertising materials mentioning features or use of this software 5077957Sbenno * must display the following acknowledgement: 5177957Sbenno * This product includes software developed by TooLs GmbH. 5277957Sbenno * 4. The name of TooLs GmbH may not be used to endorse or promote products 5377957Sbenno * derived from this software without specific prior written permission. 5477957Sbenno * 5577957Sbenno * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 5677957Sbenno * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 5777957Sbenno * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 5877957Sbenno * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 5977957Sbenno * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 6077957Sbenno * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 6177957Sbenno * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 6277957Sbenno * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 6377957Sbenno * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 6477957Sbenno * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 6577957Sbenno * 6678880Sbenno * $NetBSD: pmap.c,v 1.28 2000/03/26 20:42:36 kleink Exp $ 6777957Sbenno */ 6877957Sbenno/* 6977957Sbenno * Copyright (C) 2001 Benno Rice. 7077957Sbenno * All rights reserved. 7177957Sbenno * 7277957Sbenno * Redistribution and use in source and binary forms, with or without 7377957Sbenno * modification, are permitted provided that the following conditions 7477957Sbenno * are met: 7577957Sbenno * 1. Redistributions of source code must retain the above copyright 7677957Sbenno * notice, this list of conditions and the following disclaimer. 7777957Sbenno * 2. Redistributions in binary form must reproduce the above copyright 7877957Sbenno * notice, this list of conditions and the following disclaimer in the 7977957Sbenno * documentation and/or other materials provided with the distribution. 8077957Sbenno * 8177957Sbenno * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR 8277957Sbenno * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 8377957Sbenno * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 8477957Sbenno * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 8577957Sbenno * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 8677957Sbenno * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 8777957Sbenno * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 8877957Sbenno * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 8977957Sbenno * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 9077957Sbenno * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 9177957Sbenno */ 9277957Sbenno 9377957Sbenno#ifndef lint 9477957Sbennostatic const char rcsid[] = 9577957Sbenno "$FreeBSD: head/sys/powerpc/aim/mmu_oea.c 97385 2002-05-28 07:38:55Z benno $"; 9677957Sbenno#endif /* not lint */ 9777957Sbenno 9890643Sbenno/* 9990643Sbenno * Manages physical address maps. 10090643Sbenno * 10190643Sbenno * In addition to hardware address maps, this module is called upon to 10290643Sbenno * provide software-use-only maps which may or may not be stored in the 10390643Sbenno * same form as hardware maps. These pseudo-maps are used to store 10490643Sbenno * intermediate results from copy operations to and from address spaces. 10590643Sbenno * 10690643Sbenno * Since the information managed by this module is also stored by the 10790643Sbenno * logical address mapping module, this module may throw away valid virtual 10890643Sbenno * to physical mappings at almost any time. However, invalidations of 10990643Sbenno * mappings must be done as requested. 11090643Sbenno * 11190643Sbenno * In order to cope with hardware architectures which make virtual to 11290643Sbenno * physical map invalidates expensive, this module may delay invalidate 11390643Sbenno * reduced protection operations until such time as they are actually 11490643Sbenno * necessary. This module is given full information as to which processors 11590643Sbenno * are currently using which maps, and to when physical maps must be made 11690643Sbenno * correct. 11790643Sbenno */ 11890643Sbenno 11977957Sbenno#include <sys/param.h> 12080431Speter#include <sys/kernel.h> 12190643Sbenno#include <sys/ktr.h> 12290643Sbenno#include <sys/lock.h> 12390643Sbenno#include <sys/msgbuf.h> 12490643Sbenno#include <sys/mutex.h> 12577957Sbenno#include <sys/proc.h> 12690643Sbenno#include <sys/sysctl.h> 12790643Sbenno#include <sys/systm.h> 12877957Sbenno#include <sys/vmmeter.h> 12977957Sbenno 13090643Sbenno#include <dev/ofw/openfirm.h> 13190643Sbenno 13290643Sbenno#include <vm/vm.h> 13377957Sbenno#include <vm/vm_param.h> 13477957Sbenno#include <vm/vm_kern.h> 13577957Sbenno#include <vm/vm_page.h> 13677957Sbenno#include <vm/vm_map.h> 13777957Sbenno#include <vm/vm_object.h> 13877957Sbenno#include <vm/vm_extern.h> 13977957Sbenno#include <vm/vm_pageout.h> 14077957Sbenno#include <vm/vm_pager.h> 14192847Sjeff#include <vm/uma.h> 14277957Sbenno 14397346Sbenno#include <machine/powerpc.h> 14483730Smp#include <machine/bat.h> 14590643Sbenno#include <machine/frame.h> 14690643Sbenno#include <machine/md_var.h> 14790643Sbenno#include <machine/psl.h> 14877957Sbenno#include <machine/pte.h> 14990643Sbenno#include <machine/sr.h> 15077957Sbenno 15190643Sbenno#define PMAP_DEBUG 15277957Sbenno 15390643Sbenno#define TODO panic("%s: not implemented", __func__); 15477957Sbenno 15590643Sbenno#define PMAP_LOCK(pm) 15690643Sbenno#define PMAP_UNLOCK(pm) 15790643Sbenno 15890643Sbenno#define TLBIE(va) __asm __volatile("tlbie %0" :: "r"(va)) 15990643Sbenno#define TLBSYNC() __asm __volatile("tlbsync"); 16090643Sbenno#define SYNC() __asm __volatile("sync"); 16190643Sbenno#define EIEIO() __asm __volatile("eieio"); 16290643Sbenno 16390643Sbenno#define VSID_MAKE(sr, hash) ((sr) | (((hash) & 0xfffff) << 4)) 16490643Sbenno#define VSID_TO_SR(vsid) ((vsid) & 0xf) 16590643Sbenno#define VSID_TO_HASH(vsid) (((vsid) >> 4) & 0xfffff) 16690643Sbenno 16790643Sbenno#define PVO_PTEGIDX_MASK 0x0007 /* which PTEG slot */ 16890643Sbenno#define PVO_PTEGIDX_VALID 0x0008 /* slot is valid */ 16990643Sbenno#define PVO_WIRED 0x0010 /* PVO entry is wired */ 17090643Sbenno#define PVO_MANAGED 0x0020 /* PVO entry is managed */ 17190643Sbenno#define PVO_EXECUTABLE 0x0040 /* PVO entry is executable */ 17294835Sbenno#define PVO_BOOTSTRAP 0x0080 /* PVO entry allocated during 17392521Sbenno bootstrap */ 17490643Sbenno#define PVO_VADDR(pvo) ((pvo)->pvo_vaddr & ~ADDR_POFF) 17590643Sbenno#define PVO_ISEXECUTABLE(pvo) ((pvo)->pvo_vaddr & PVO_EXECUTABLE) 17690643Sbenno#define PVO_PTEGIDX_GET(pvo) ((pvo)->pvo_vaddr & PVO_PTEGIDX_MASK) 17790643Sbenno#define PVO_PTEGIDX_ISSET(pvo) ((pvo)->pvo_vaddr & PVO_PTEGIDX_VALID) 17890643Sbenno#define PVO_PTEGIDX_CLR(pvo) \ 17990643Sbenno ((void)((pvo)->pvo_vaddr &= ~(PVO_PTEGIDX_VALID|PVO_PTEGIDX_MASK))) 18090643Sbenno#define PVO_PTEGIDX_SET(pvo, i) \ 18190643Sbenno ((void)((pvo)->pvo_vaddr |= (i)|PVO_PTEGIDX_VALID)) 18290643Sbenno 18390643Sbenno#define PMAP_PVO_CHECK(pvo) 18490643Sbenno 18590643Sbennostruct ofw_map { 18690643Sbenno vm_offset_t om_va; 18790643Sbenno vm_size_t om_len; 18890643Sbenno vm_offset_t om_pa; 18990643Sbenno u_int om_mode; 19090643Sbenno}; 19177957Sbenno 19290643Sbennoint pmap_bootstrapped = 0; 19377957Sbenno 19490643Sbenno/* 19590643Sbenno * Virtual and physical address of message buffer. 19690643Sbenno */ 19790643Sbennostruct msgbuf *msgbufp; 19890643Sbennovm_offset_t msgbuf_phys; 19977957Sbenno 20090643Sbenno/* 20190643Sbenno * Physical addresses of first and last available physical page. 20290643Sbenno */ 20390643Sbennovm_offset_t avail_start; 20490643Sbennovm_offset_t avail_end; 20577957Sbenno 20690643Sbenno/* 20790643Sbenno * Map of physical memory regions. 20890643Sbenno */ 20990643Sbennovm_offset_t phys_avail[128]; 21090643Sbennou_int phys_avail_count; 21197346Sbennostatic struct mem_region *regions; 21297346Sbennostatic struct mem_region *pregions; 21397346Sbennoint regions_sz, pregions_sz; 21490643Sbennostatic struct ofw_map translations[128]; 21590643Sbennostatic int translations_size; 21677957Sbenno 21790643Sbenno/* 21890643Sbenno * First and last available kernel virtual addresses. 21990643Sbenno */ 22090643Sbennovm_offset_t virtual_avail; 22190643Sbennovm_offset_t virtual_end; 22290643Sbennovm_offset_t kernel_vm_end; 22377957Sbenno 22490643Sbenno/* 22590643Sbenno * Kernel pmap. 22690643Sbenno */ 22790643Sbennostruct pmap kernel_pmap_store; 22890643Sbennoextern struct pmap ofw_pmap; 22977957Sbenno 23090643Sbenno/* 23190643Sbenno * PTEG data. 23290643Sbenno */ 23390643Sbennostatic struct pteg *pmap_pteg_table; 23490643Sbennou_int pmap_pteg_count; 23590643Sbennou_int pmap_pteg_mask; 23677957Sbenno 23790643Sbenno/* 23890643Sbenno * PVO data. 23990643Sbenno */ 24090643Sbennostruct pvo_head *pmap_pvo_table; /* pvo entries by pteg index */ 24190643Sbennostruct pvo_head pmap_pvo_kunmanaged = 24290643Sbenno LIST_HEAD_INITIALIZER(pmap_pvo_kunmanaged); /* list of unmanaged pages */ 24390643Sbennostruct pvo_head pmap_pvo_unmanaged = 24490643Sbenno LIST_HEAD_INITIALIZER(pmap_pvo_unmanaged); /* list of unmanaged pages */ 24577957Sbenno 24692847Sjeffuma_zone_t pmap_upvo_zone; /* zone for pvo entries for unmanaged pages */ 24792847Sjeffuma_zone_t pmap_mpvo_zone; /* zone for pvo entries for managed pages */ 24890643Sbennostruct vm_object pmap_upvo_zone_obj; 24990643Sbennostruct vm_object pmap_mpvo_zone_obj; 25092654Sjeffstatic vm_object_t pmap_pvo_obj; 25192654Sjeffstatic u_int pmap_pvo_count; 25277957Sbenno 25390643Sbenno#define PMAP_PVO_SIZE 1024 25492521Sbennostatic struct pvo_entry *pmap_bpvo_pool; 25592521Sbennostatic int pmap_bpvo_pool_index; 25692521Sbennostatic int pmap_bpvo_pool_count; 25777957Sbenno 25890643Sbenno#define VSID_NBPW (sizeof(u_int32_t) * 8) 25990643Sbennostatic u_int pmap_vsid_bitmap[NPMAPS / VSID_NBPW]; 26077957Sbenno 26190643Sbennostatic boolean_t pmap_initialized = FALSE; 26277957Sbenno 26390643Sbenno/* 26490643Sbenno * Statistics. 26590643Sbenno */ 26690643Sbennou_int pmap_pte_valid = 0; 26790643Sbennou_int pmap_pte_overflow = 0; 26890643Sbennou_int pmap_pte_replacements = 0; 26990643Sbennou_int pmap_pvo_entries = 0; 27090643Sbennou_int pmap_pvo_enter_calls = 0; 27190643Sbennou_int pmap_pvo_remove_calls = 0; 27290643Sbennou_int pmap_pte_spills = 0; 27390643SbennoSYSCTL_INT(_machdep, OID_AUTO, pmap_pte_valid, CTLFLAG_RD, &pmap_pte_valid, 27490643Sbenno 0, ""); 27590643SbennoSYSCTL_INT(_machdep, OID_AUTO, pmap_pte_overflow, CTLFLAG_RD, 27690643Sbenno &pmap_pte_overflow, 0, ""); 27790643SbennoSYSCTL_INT(_machdep, OID_AUTO, pmap_pte_replacements, CTLFLAG_RD, 27890643Sbenno &pmap_pte_replacements, 0, ""); 27990643SbennoSYSCTL_INT(_machdep, OID_AUTO, pmap_pvo_entries, CTLFLAG_RD, &pmap_pvo_entries, 28090643Sbenno 0, ""); 28190643SbennoSYSCTL_INT(_machdep, OID_AUTO, pmap_pvo_enter_calls, CTLFLAG_RD, 28290643Sbenno &pmap_pvo_enter_calls, 0, ""); 28390643SbennoSYSCTL_INT(_machdep, OID_AUTO, pmap_pvo_remove_calls, CTLFLAG_RD, 28490643Sbenno &pmap_pvo_remove_calls, 0, ""); 28590643SbennoSYSCTL_INT(_machdep, OID_AUTO, pmap_pte_spills, CTLFLAG_RD, 28690643Sbenno &pmap_pte_spills, 0, ""); 28777957Sbenno 28890643Sbennostruct pvo_entry *pmap_pvo_zeropage; 28977957Sbenno 29090643Sbennovm_offset_t pmap_rkva_start = VM_MIN_KERNEL_ADDRESS; 29190643Sbennou_int pmap_rkva_count = 4; 29277957Sbenno 29390643Sbenno/* 29490643Sbenno * Allocate physical memory for use in pmap_bootstrap. 29590643Sbenno */ 29690643Sbennostatic vm_offset_t pmap_bootstrap_alloc(vm_size_t, u_int); 29777957Sbenno 29890643Sbenno/* 29990643Sbenno * PTE calls. 30090643Sbenno */ 30190643Sbennostatic int pmap_pte_insert(u_int, struct pte *); 30277957Sbenno 30377957Sbenno/* 30490643Sbenno * PVO calls. 30577957Sbenno */ 30692847Sjeffstatic int pmap_pvo_enter(pmap_t, uma_zone_t, struct pvo_head *, 30790643Sbenno vm_offset_t, vm_offset_t, u_int, int); 30890643Sbennostatic void pmap_pvo_remove(struct pvo_entry *, int); 30990643Sbennostatic struct pvo_entry *pmap_pvo_find_va(pmap_t, vm_offset_t, int *); 31090643Sbennostatic struct pte *pmap_pvo_to_pte(const struct pvo_entry *, int); 31190643Sbenno 31290643Sbenno/* 31390643Sbenno * Utility routines. 31490643Sbenno */ 31592654Sjeffstatic void * pmap_pvo_allocf(uma_zone_t, int, u_int8_t *, int); 31690643Sbennostatic struct pvo_entry *pmap_rkva_alloc(void); 31790643Sbennostatic void pmap_pa_map(struct pvo_entry *, vm_offset_t, 31890643Sbenno struct pte *, int *); 31990643Sbennostatic void pmap_pa_unmap(struct pvo_entry *, struct pte *, int *); 32090643Sbennostatic void pmap_syncicache(vm_offset_t, vm_size_t); 32190643Sbennostatic boolean_t pmap_query_bit(vm_page_t, int); 32290643Sbennostatic boolean_t pmap_clear_bit(vm_page_t, int); 32390643Sbennostatic void tlbia(void); 32490643Sbenno 32590643Sbennostatic __inline int 32690643Sbennova_to_sr(u_int *sr, vm_offset_t va) 32777957Sbenno{ 32890643Sbenno return (sr[(uintptr_t)va >> ADDR_SR_SHFT]); 32990643Sbenno} 33077957Sbenno 33190643Sbennostatic __inline u_int 33290643Sbennova_to_pteg(u_int sr, vm_offset_t addr) 33390643Sbenno{ 33490643Sbenno u_int hash; 33590643Sbenno 33690643Sbenno hash = (sr & SR_VSID_MASK) ^ (((u_int)addr & ADDR_PIDX) >> 33790643Sbenno ADDR_PIDX_SHFT); 33890643Sbenno return (hash & pmap_pteg_mask); 33977957Sbenno} 34077957Sbenno 34190643Sbennostatic __inline struct pvo_head * 34296250Sbennopa_to_pvoh(vm_offset_t pa, vm_page_t *pg_p) 34377957Sbenno{ 34490643Sbenno struct vm_page *pg; 34577957Sbenno 34690643Sbenno pg = PHYS_TO_VM_PAGE(pa); 34790643Sbenno 34896250Sbenno if (pg_p != NULL) 34996250Sbenno *pg_p = pg; 35096250Sbenno 35190643Sbenno if (pg == NULL) 35290643Sbenno return (&pmap_pvo_unmanaged); 35390643Sbenno 35490643Sbenno return (&pg->md.mdpg_pvoh); 35577957Sbenno} 35677957Sbenno 35790643Sbennostatic __inline struct pvo_head * 35890643Sbennovm_page_to_pvoh(vm_page_t m) 35990643Sbenno{ 36090643Sbenno 36190643Sbenno return (&m->md.mdpg_pvoh); 36290643Sbenno} 36390643Sbenno 36477957Sbennostatic __inline void 36590643Sbennopmap_attr_clear(vm_page_t m, int ptebit) 36677957Sbenno{ 36790643Sbenno 36890643Sbenno m->md.mdpg_attrs &= ~ptebit; 36977957Sbenno} 37077957Sbenno 37177957Sbennostatic __inline int 37290643Sbennopmap_attr_fetch(vm_page_t m) 37377957Sbenno{ 37477957Sbenno 37590643Sbenno return (m->md.mdpg_attrs); 37677957Sbenno} 37777957Sbenno 37890643Sbennostatic __inline void 37990643Sbennopmap_attr_save(vm_page_t m, int ptebit) 38090643Sbenno{ 38190643Sbenno 38290643Sbenno m->md.mdpg_attrs |= ptebit; 38390643Sbenno} 38490643Sbenno 38577957Sbennostatic __inline int 38690643Sbennopmap_pte_compare(const struct pte *pt, const struct pte *pvo_pt) 38777957Sbenno{ 38890643Sbenno if (pt->pte_hi == pvo_pt->pte_hi) 38990643Sbenno return (1); 39090643Sbenno 39190643Sbenno return (0); 39277957Sbenno} 39377957Sbenno 39477957Sbennostatic __inline int 39590643Sbennopmap_pte_match(struct pte *pt, u_int sr, vm_offset_t va, int which) 39677957Sbenno{ 39790643Sbenno return (pt->pte_hi & ~PTE_VALID) == 39890643Sbenno (((sr & SR_VSID_MASK) << PTE_VSID_SHFT) | 39990643Sbenno ((va >> ADDR_API_SHFT) & PTE_API) | which); 40090643Sbenno} 40177957Sbenno 40290643Sbennostatic __inline void 40390643Sbennopmap_pte_create(struct pte *pt, u_int sr, vm_offset_t va, u_int pte_lo) 40490643Sbenno{ 40590643Sbenno /* 40690643Sbenno * Construct a PTE. Default to IMB initially. Valid bit only gets 40790643Sbenno * set when the real pte is set in memory. 40890643Sbenno * 40990643Sbenno * Note: Don't set the valid bit for correct operation of tlb update. 41090643Sbenno */ 41190643Sbenno pt->pte_hi = ((sr & SR_VSID_MASK) << PTE_VSID_SHFT) | 41290643Sbenno (((va & ADDR_PIDX) >> ADDR_API_SHFT) & PTE_API); 41390643Sbenno pt->pte_lo = pte_lo; 41477957Sbenno} 41577957Sbenno 41690643Sbennostatic __inline void 41790643Sbennopmap_pte_synch(struct pte *pt, struct pte *pvo_pt) 41877957Sbenno{ 41977957Sbenno 42090643Sbenno pvo_pt->pte_lo |= pt->pte_lo & (PTE_REF | PTE_CHG); 42177957Sbenno} 42277957Sbenno 42390643Sbennostatic __inline void 42490643Sbennopmap_pte_clear(struct pte *pt, vm_offset_t va, int ptebit) 42577957Sbenno{ 42677957Sbenno 42790643Sbenno /* 42890643Sbenno * As shown in Section 7.6.3.2.3 42990643Sbenno */ 43090643Sbenno pt->pte_lo &= ~ptebit; 43190643Sbenno TLBIE(va); 43290643Sbenno EIEIO(); 43390643Sbenno TLBSYNC(); 43490643Sbenno SYNC(); 43577957Sbenno} 43677957Sbenno 43790643Sbennostatic __inline void 43890643Sbennopmap_pte_set(struct pte *pt, struct pte *pvo_pt) 43977957Sbenno{ 44077957Sbenno 44190643Sbenno pvo_pt->pte_hi |= PTE_VALID; 44290643Sbenno 44377957Sbenno /* 44490643Sbenno * Update the PTE as defined in section 7.6.3.1. 44590643Sbenno * Note that the REF/CHG bits are from pvo_pt and thus should havce 44690643Sbenno * been saved so this routine can restore them (if desired). 44777957Sbenno */ 44890643Sbenno pt->pte_lo = pvo_pt->pte_lo; 44990643Sbenno EIEIO(); 45090643Sbenno pt->pte_hi = pvo_pt->pte_hi; 45190643Sbenno SYNC(); 45290643Sbenno pmap_pte_valid++; 45390643Sbenno} 45477957Sbenno 45590643Sbennostatic __inline void 45690643Sbennopmap_pte_unset(struct pte *pt, struct pte *pvo_pt, vm_offset_t va) 45790643Sbenno{ 45890643Sbenno 45990643Sbenno pvo_pt->pte_hi &= ~PTE_VALID; 46090643Sbenno 46177957Sbenno /* 46290643Sbenno * Force the reg & chg bits back into the PTEs. 46377957Sbenno */ 46490643Sbenno SYNC(); 46577957Sbenno 46690643Sbenno /* 46790643Sbenno * Invalidate the pte. 46890643Sbenno */ 46990643Sbenno pt->pte_hi &= ~PTE_VALID; 47077957Sbenno 47190643Sbenno SYNC(); 47290643Sbenno TLBIE(va); 47390643Sbenno EIEIO(); 47490643Sbenno TLBSYNC(); 47590643Sbenno SYNC(); 47677957Sbenno 47790643Sbenno /* 47890643Sbenno * Save the reg & chg bits. 47990643Sbenno */ 48090643Sbenno pmap_pte_synch(pt, pvo_pt); 48190643Sbenno pmap_pte_valid--; 48277957Sbenno} 48377957Sbenno 48490643Sbennostatic __inline void 48590643Sbennopmap_pte_change(struct pte *pt, struct pte *pvo_pt, vm_offset_t va) 48690643Sbenno{ 48790643Sbenno 48890643Sbenno /* 48990643Sbenno * Invalidate the PTE 49090643Sbenno */ 49190643Sbenno pmap_pte_unset(pt, pvo_pt, va); 49290643Sbenno pmap_pte_set(pt, pvo_pt); 49390643Sbenno} 49490643Sbenno 49577957Sbenno/* 49690643Sbenno * Quick sort callout for comparing memory regions. 49777957Sbenno */ 49890643Sbennostatic int mr_cmp(const void *a, const void *b); 49990643Sbennostatic int om_cmp(const void *a, const void *b); 50090643Sbenno 50190643Sbennostatic int 50290643Sbennomr_cmp(const void *a, const void *b) 50377957Sbenno{ 50490643Sbenno const struct mem_region *regiona; 50590643Sbenno const struct mem_region *regionb; 50677957Sbenno 50790643Sbenno regiona = a; 50890643Sbenno regionb = b; 50990643Sbenno if (regiona->mr_start < regionb->mr_start) 51090643Sbenno return (-1); 51190643Sbenno else if (regiona->mr_start > regionb->mr_start) 51290643Sbenno return (1); 51390643Sbenno else 51490643Sbenno return (0); 51590643Sbenno} 51677957Sbenno 51790643Sbennostatic int 51890643Sbennoom_cmp(const void *a, const void *b) 51990643Sbenno{ 52090643Sbenno const struct ofw_map *mapa; 52190643Sbenno const struct ofw_map *mapb; 52290643Sbenno 52390643Sbenno mapa = a; 52490643Sbenno mapb = b; 52590643Sbenno if (mapa->om_pa < mapb->om_pa) 52690643Sbenno return (-1); 52790643Sbenno else if (mapa->om_pa > mapb->om_pa) 52890643Sbenno return (1); 52990643Sbenno else 53090643Sbenno return (0); 53177957Sbenno} 53277957Sbenno 53377957Sbennovoid 53490643Sbennopmap_bootstrap(vm_offset_t kernelstart, vm_offset_t kernelend) 53577957Sbenno{ 53697346Sbenno ihandle_t mmui; 53790643Sbenno phandle_t chosen, mmu; 53890643Sbenno int sz; 53990643Sbenno int i, j; 54091793Sbenno vm_size_t size, physsz; 54190643Sbenno vm_offset_t pa, va, off; 54290643Sbenno u_int batl, batu; 54377957Sbenno 54477957Sbenno /* 54590643Sbenno * Use an IBAT and a DBAT to map the bottom segment of memory 54690643Sbenno * where we are. 54777957Sbenno */ 54890643Sbenno batu = BATU(0x00000000, BAT_BL_256M, BAT_Vs); 54990643Sbenno batl = BATL(0x00000000, BAT_M, BAT_PP_RW); 55090643Sbenno __asm ("mtibatu 0,%0; mtibatl 0,%1; mtdbatu 0,%0; mtdbatl 0,%1" 55190643Sbenno :: "r"(batu), "r"(batl)); 55290643Sbenno#if 0 55390643Sbenno batu = BATU(0x80000000, BAT_BL_256M, BAT_Vs); 55490643Sbenno batl = BATL(0x80000000, BAT_M, BAT_PP_RW); 55590643Sbenno __asm ("mtibatu 1,%0; mtibatl 1,%1; mtdbatu 1,%0; mtdbatl 1,%1" 55690643Sbenno :: "r"(batu), "r"(batl)); 55790643Sbenno#endif 55877957Sbenno 55977957Sbenno /* 56090643Sbenno * Set the start and end of kva. 56177957Sbenno */ 56290643Sbenno virtual_avail = VM_MIN_KERNEL_ADDRESS; 56390643Sbenno virtual_end = VM_MAX_KERNEL_ADDRESS; 56490643Sbenno 56597346Sbenno mem_regions(&pregions, &pregions_sz, ®ions, ®ions_sz); 56697346Sbenno CTR0(KTR_PMAP, "pmap_bootstrap: physical memory"); 56797346Sbenno 56897346Sbenno qsort(pregions, pregions_sz, sizeof(*pregions), mr_cmp); 56997346Sbenno for (i = 0; i < pregions_sz; i++) { 57097346Sbenno CTR3(KTR_PMAP, "physregion: %#x - %#x (%#x)", 57197346Sbenno pregions[i].mr_start, 57297346Sbenno pregions[i].mr_start + pregions[i].mr_size, 57397346Sbenno pregions[i].mr_size); 57497346Sbenno } 57597346Sbenno 57697346Sbenno if (sizeof(phys_avail)/sizeof(phys_avail[0]) < regions_sz) 57790643Sbenno panic("pmap_bootstrap: phys_avail too small"); 57897346Sbenno qsort(regions, regions_sz, sizeof(*regions), mr_cmp); 57990643Sbenno phys_avail_count = 0; 58091793Sbenno physsz = 0; 58197346Sbenno for (i = 0, j = 0; i < regions_sz; i++, j += 2) { 58290643Sbenno CTR3(KTR_PMAP, "region: %#x - %#x (%#x)", regions[i].mr_start, 58390643Sbenno regions[i].mr_start + regions[i].mr_size, 58490643Sbenno regions[i].mr_size); 58590643Sbenno phys_avail[j] = regions[i].mr_start; 58690643Sbenno phys_avail[j + 1] = regions[i].mr_start + regions[i].mr_size; 58790643Sbenno phys_avail_count++; 58891793Sbenno physsz += regions[i].mr_size; 58977957Sbenno } 59091793Sbenno physmem = btoc(physsz); 59177957Sbenno 59277957Sbenno /* 59390643Sbenno * Allocate PTEG table. 59477957Sbenno */ 59590643Sbenno#ifdef PTEGCOUNT 59690643Sbenno pmap_pteg_count = PTEGCOUNT; 59790643Sbenno#else 59890643Sbenno pmap_pteg_count = 0x1000; 59977957Sbenno 60090643Sbenno while (pmap_pteg_count < physmem) 60190643Sbenno pmap_pteg_count <<= 1; 60277957Sbenno 60390643Sbenno pmap_pteg_count >>= 1; 60490643Sbenno#endif /* PTEGCOUNT */ 60577957Sbenno 60690643Sbenno size = pmap_pteg_count * sizeof(struct pteg); 60790643Sbenno CTR2(KTR_PMAP, "pmap_bootstrap: %d PTEGs, %d bytes", pmap_pteg_count, 60890643Sbenno size); 60990643Sbenno pmap_pteg_table = (struct pteg *)pmap_bootstrap_alloc(size, size); 61090643Sbenno CTR1(KTR_PMAP, "pmap_bootstrap: PTEG table at %p", pmap_pteg_table); 61190643Sbenno bzero((void *)pmap_pteg_table, pmap_pteg_count * sizeof(struct pteg)); 61290643Sbenno pmap_pteg_mask = pmap_pteg_count - 1; 61377957Sbenno 61490643Sbenno /* 61594839Sbenno * Allocate pv/overflow lists. 61690643Sbenno */ 61790643Sbenno size = sizeof(struct pvo_head) * pmap_pteg_count; 61890643Sbenno pmap_pvo_table = (struct pvo_head *)pmap_bootstrap_alloc(size, 61990643Sbenno PAGE_SIZE); 62090643Sbenno CTR1(KTR_PMAP, "pmap_bootstrap: PVO table at %p", pmap_pvo_table); 62190643Sbenno for (i = 0; i < pmap_pteg_count; i++) 62290643Sbenno LIST_INIT(&pmap_pvo_table[i]); 62377957Sbenno 62490643Sbenno /* 62590643Sbenno * Allocate the message buffer. 62690643Sbenno */ 62790643Sbenno msgbuf_phys = pmap_bootstrap_alloc(MSGBUF_SIZE, 0); 62877957Sbenno 62990643Sbenno /* 63090643Sbenno * Initialise the unmanaged pvo pool. 63190643Sbenno */ 63292521Sbenno pmap_bpvo_pool = (struct pvo_entry *)pmap_bootstrap_alloc(PAGE_SIZE, 0); 63392521Sbenno pmap_bpvo_pool_index = 0; 63492521Sbenno pmap_bpvo_pool_count = (int)PAGE_SIZE / sizeof(struct pvo_entry); 63577957Sbenno 63677957Sbenno /* 63790643Sbenno * Make sure kernel vsid is allocated as well as VSID 0. 63877957Sbenno */ 63990643Sbenno pmap_vsid_bitmap[(KERNEL_VSIDBITS & (NPMAPS - 1)) / VSID_NBPW] 64090643Sbenno |= 1 << (KERNEL_VSIDBITS % VSID_NBPW); 64190643Sbenno pmap_vsid_bitmap[0] |= 1; 64277957Sbenno 64390643Sbenno /* 64490643Sbenno * Set up the OpenFirmware pmap and add it's mappings. 64590643Sbenno */ 64690643Sbenno pmap_pinit(&ofw_pmap); 64790643Sbenno ofw_pmap.pm_sr[KERNEL_SR] = KERNEL_SEGMENT; 64890643Sbenno if ((chosen = OF_finddevice("/chosen")) == -1) 64990643Sbenno panic("pmap_bootstrap: can't find /chosen"); 65090643Sbenno OF_getprop(chosen, "mmu", &mmui, 4); 65190643Sbenno if ((mmu = OF_instance_to_package(mmui)) == -1) 65290643Sbenno panic("pmap_bootstrap: can't get mmu package"); 65390643Sbenno if ((sz = OF_getproplen(mmu, "translations")) == -1) 65490643Sbenno panic("pmap_bootstrap: can't get ofw translation count"); 65590643Sbenno if (sizeof(translations) < sz) 65690643Sbenno panic("pmap_bootstrap: translations too small"); 65790643Sbenno bzero(translations, sz); 65890643Sbenno if (OF_getprop(mmu, "translations", translations, sz) == -1) 65990643Sbenno panic("pmap_bootstrap: can't get ofw translations"); 66090643Sbenno CTR0(KTR_PMAP, "pmap_bootstrap: translations"); 66197346Sbenno sz /= sizeof(*translations); 66290643Sbenno qsort(translations, sz, sizeof (*translations), om_cmp); 66390643Sbenno for (i = 0; i < sz; i++) { 66490643Sbenno CTR3(KTR_PMAP, "translation: pa=%#x va=%#x len=%#x", 66590643Sbenno translations[i].om_pa, translations[i].om_va, 66690643Sbenno translations[i].om_len); 66777957Sbenno 66890643Sbenno /* Drop stuff below something? */ 66977957Sbenno 67090643Sbenno /* Enter the pages? */ 67190643Sbenno for (off = 0; off < translations[i].om_len; off += PAGE_SIZE) { 67290643Sbenno struct vm_page m; 67377957Sbenno 67490643Sbenno m.phys_addr = translations[i].om_pa + off; 67590643Sbenno pmap_enter(&ofw_pmap, translations[i].om_va + off, &m, 67690643Sbenno VM_PROT_ALL, 1); 67777957Sbenno } 67877957Sbenno } 67990643Sbenno#ifdef SMP 68090643Sbenno TLBSYNC(); 68190643Sbenno#endif 68277957Sbenno 68390643Sbenno /* 68490643Sbenno * Initialize the kernel pmap (which is statically allocated). 68590643Sbenno */ 68690643Sbenno for (i = 0; i < 16; i++) { 68790643Sbenno kernel_pmap->pm_sr[i] = EMPTY_SEGMENT; 68877957Sbenno } 68990643Sbenno kernel_pmap->pm_sr[KERNEL_SR] = KERNEL_SEGMENT; 69090643Sbenno kernel_pmap->pm_active = ~0; 69177957Sbenno 69277957Sbenno /* 69390643Sbenno * Allocate a kernel stack with a guard page for thread0 and map it 69490643Sbenno * into the kernel page map. 69577957Sbenno */ 69690643Sbenno pa = pmap_bootstrap_alloc(KSTACK_PAGES * PAGE_SIZE, 0); 69790643Sbenno kstack0_phys = pa; 69890643Sbenno kstack0 = virtual_avail + (KSTACK_GUARD_PAGES * PAGE_SIZE); 69990643Sbenno CTR2(KTR_PMAP, "pmap_bootstrap: kstack0 at %#x (%#x)", kstack0_phys, 70090643Sbenno kstack0); 70190643Sbenno virtual_avail += (KSTACK_PAGES + KSTACK_GUARD_PAGES) * PAGE_SIZE; 70290643Sbenno for (i = 0; i < KSTACK_PAGES; i++) { 70390643Sbenno pa = kstack0_phys + i * PAGE_SIZE; 70490643Sbenno va = kstack0 + i * PAGE_SIZE; 70590643Sbenno pmap_kenter(va, pa); 70690643Sbenno TLBIE(va); 70777957Sbenno } 70877957Sbenno 70990643Sbenno /* 71090643Sbenno * Calculate the first and last available physical addresses. 71190643Sbenno */ 71290643Sbenno avail_start = phys_avail[0]; 71390643Sbenno for (i = 0; phys_avail[i + 2] != 0; i += 2) 71490643Sbenno ; 71590643Sbenno avail_end = phys_avail[i + 1]; 71690643Sbenno Maxmem = powerpc_btop(avail_end); 71777957Sbenno 71877957Sbenno /* 71990643Sbenno * Allocate virtual address space for the message buffer. 72077957Sbenno */ 72190643Sbenno msgbufp = (struct msgbuf *)virtual_avail; 72290643Sbenno virtual_avail += round_page(MSGBUF_SIZE); 72377957Sbenno 72477957Sbenno /* 72590643Sbenno * Initialize hardware. 72677957Sbenno */ 72777957Sbenno for (i = 0; i < 16; i++) { 72894836Sbenno mtsrin(i << ADDR_SR_SHFT, EMPTY_SEGMENT); 72977957Sbenno } 73077957Sbenno __asm __volatile ("mtsr %0,%1" 73190643Sbenno :: "n"(KERNEL_SR), "r"(KERNEL_SEGMENT)); 73277957Sbenno __asm __volatile ("sync; mtsdr1 %0; isync" 73390643Sbenno :: "r"((u_int)pmap_pteg_table | (pmap_pteg_mask >> 10))); 73477957Sbenno tlbia(); 73577957Sbenno 73690643Sbenno pmap_bootstrapped++; 73777957Sbenno} 73877957Sbenno 73977957Sbenno/* 74090643Sbenno * Activate a user pmap. The pmap must be activated before it's address 74190643Sbenno * space can be accessed in any way. 74277957Sbenno */ 74377957Sbennovoid 74490643Sbennopmap_activate(struct thread *td) 74577957Sbenno{ 74696250Sbenno pmap_t pm, pmr; 74777957Sbenno 74877957Sbenno /* 74990643Sbenno * Load all the data we need up front to encourasge the compiler to 75090643Sbenno * not issue any loads while we have interrupts disabled below. 75177957Sbenno */ 75290643Sbenno pm = &td->td_proc->p_vmspace->vm_pmap; 75377957Sbenno 75490643Sbenno KASSERT(pm->pm_active == 0, ("pmap_activate: pmap already active?")); 75577957Sbenno 75696250Sbenno if ((pmr = (pmap_t)pmap_kextract((vm_offset_t)pm)) == NULL) 75796250Sbenno pmr = pm; 75896250Sbenno 75990643Sbenno pm->pm_active |= PCPU_GET(cpumask); 76096250Sbenno PCPU_SET(curpmap, pmr); 76177957Sbenno} 76277957Sbenno 76391483Sbennovoid 76491483Sbennopmap_deactivate(struct thread *td) 76591483Sbenno{ 76691483Sbenno pmap_t pm; 76791483Sbenno 76891483Sbenno pm = &td->td_proc->p_vmspace->vm_pmap; 76991483Sbenno pm->pm_active &= ~(PCPU_GET(cpumask)); 77096250Sbenno PCPU_SET(curpmap, NULL); 77191483Sbenno} 77291483Sbenno 77390643Sbennovm_offset_t 77490643Sbennopmap_addr_hint(vm_object_t object, vm_offset_t va, vm_size_t size) 77577957Sbenno{ 77696353Sbenno 77796353Sbenno return (va); 77877957Sbenno} 77977957Sbenno 78077957Sbennovoid 78196353Sbennopmap_change_wiring(pmap_t pm, vm_offset_t va, boolean_t wired) 78277957Sbenno{ 78396353Sbenno struct pvo_entry *pvo; 78496353Sbenno 78596353Sbenno pvo = pmap_pvo_find_va(pm, va & ~ADDR_POFF, NULL); 78696353Sbenno 78796353Sbenno if (pvo != NULL) { 78896353Sbenno if (wired) { 78996353Sbenno if ((pvo->pvo_vaddr & PVO_WIRED) == 0) 79096353Sbenno pm->pm_stats.wired_count++; 79196353Sbenno pvo->pvo_vaddr |= PVO_WIRED; 79296353Sbenno } else { 79396353Sbenno if ((pvo->pvo_vaddr & PVO_WIRED) != 0) 79496353Sbenno pm->pm_stats.wired_count--; 79596353Sbenno pvo->pvo_vaddr &= ~PVO_WIRED; 79696353Sbenno } 79796353Sbenno } 79877957Sbenno} 79977957Sbenno 80077957Sbennovoid 80190643Sbennopmap_clear_modify(vm_page_t m) 80277957Sbenno{ 80377957Sbenno 80490643Sbenno if (m->flags * PG_FICTITIOUS) 80590643Sbenno return; 80690643Sbenno pmap_clear_bit(m, PTE_CHG); 80777957Sbenno} 80877957Sbenno 80977957Sbennovoid 81090643Sbennopmap_collect(void) 81177957Sbenno{ 81290643Sbenno TODO; 81377957Sbenno} 81477957Sbenno 81577957Sbennovoid 81690643Sbennopmap_copy(pmap_t dst_pmap, pmap_t src_pmap, vm_offset_t dst_addr, 81790643Sbenno vm_size_t len, vm_offset_t src_addr) 81877957Sbenno{ 81997385Sbenno 82097385Sbenno /* 82197385Sbenno * This is not needed as it's mainly an optimisation. 82297385Sbenno * It may want to be implemented later though. 82397385Sbenno */ 82477957Sbenno} 82577957Sbenno 82677957Sbennovoid 82797385Sbennopmap_copy_page(vm_page_t msrc, vm_page_t mdst) 82877957Sbenno{ 82997385Sbenno vm_offset_t dst; 83097385Sbenno vm_offset_t src; 83197385Sbenno 83297385Sbenno dst = VM_PAGE_TO_PHYS(mdst); 83397385Sbenno src = VM_PAGE_TO_PHYS(msrc); 83497385Sbenno 83597385Sbenno kcopy((void *)src, (void *)dst, PAGE_SIZE); 83677957Sbenno} 83777957Sbenno 83877957Sbenno/* 83990643Sbenno * Zero a page of physical memory by temporarily mapping it into the tlb. 84077957Sbenno */ 84177957Sbennovoid 84294777Speterpmap_zero_page(vm_page_t m) 84377957Sbenno{ 84494777Speter vm_offset_t pa = VM_PAGE_TO_PHYS(m); 84590643Sbenno caddr_t va; 84677957Sbenno int i; 84777957Sbenno 84890643Sbenno if (pa < SEGMENT_LENGTH) { 84990643Sbenno va = (caddr_t) pa; 85090643Sbenno } else if (pmap_initialized) { 85190643Sbenno if (pmap_pvo_zeropage == NULL) 85290643Sbenno pmap_pvo_zeropage = pmap_rkva_alloc(); 85390643Sbenno pmap_pa_map(pmap_pvo_zeropage, pa, NULL, NULL); 85490643Sbenno va = (caddr_t)PVO_VADDR(pmap_pvo_zeropage); 85590643Sbenno } else { 85690643Sbenno panic("pmap_zero_page: can't zero pa %#x", pa); 85777957Sbenno } 85890643Sbenno 85990643Sbenno bzero(va, PAGE_SIZE); 86090643Sbenno 86190643Sbenno for (i = PAGE_SIZE / CACHELINESIZE; i > 0; i--) { 86290643Sbenno __asm __volatile("dcbz 0,%0" :: "r"(va)); 86390643Sbenno va += CACHELINESIZE; 86490643Sbenno } 86590643Sbenno 86690643Sbenno if (pa >= SEGMENT_LENGTH) 86790643Sbenno pmap_pa_unmap(pmap_pvo_zeropage, NULL, NULL); 86877957Sbenno} 86977957Sbenno 87077957Sbennovoid 87194777Speterpmap_zero_page_area(vm_page_t m, int off, int size) 87277957Sbenno{ 87390643Sbenno TODO; 87477957Sbenno} 87577957Sbenno 87677957Sbenno/* 87790643Sbenno * Map the given physical page at the specified virtual address in the 87890643Sbenno * target pmap with the protection requested. If specified the page 87990643Sbenno * will be wired down. 88077957Sbenno */ 88177957Sbennovoid 88290643Sbennopmap_enter(pmap_t pmap, vm_offset_t va, vm_page_t m, vm_prot_t prot, 88390643Sbenno boolean_t wired) 88477957Sbenno{ 88590643Sbenno struct pvo_head *pvo_head; 88692847Sjeff uma_zone_t zone; 88796250Sbenno vm_page_t pg; 88896250Sbenno u_int pte_lo, pvo_flags, was_exec, i; 88990643Sbenno int error; 89077957Sbenno 89190643Sbenno if (!pmap_initialized) { 89290643Sbenno pvo_head = &pmap_pvo_kunmanaged; 89390643Sbenno zone = pmap_upvo_zone; 89490643Sbenno pvo_flags = 0; 89596250Sbenno pg = NULL; 89696250Sbenno was_exec = PTE_EXEC; 89790643Sbenno } else { 89896250Sbenno pvo_head = pa_to_pvoh(VM_PAGE_TO_PHYS(m), &pg); 89990643Sbenno zone = pmap_mpvo_zone; 90090643Sbenno pvo_flags = PVO_MANAGED; 90196250Sbenno was_exec = 0; 90290643Sbenno } 90377957Sbenno 90496250Sbenno /* 90596250Sbenno * If this is a managed page, and it's the first reference to the page, 90696250Sbenno * clear the execness of the page. Otherwise fetch the execness. 90796250Sbenno */ 90896250Sbenno if (pg != NULL) { 90996250Sbenno if (LIST_EMPTY(pvo_head)) { 91096250Sbenno pmap_attr_clear(pg, PTE_EXEC); 91196250Sbenno } else { 91296250Sbenno was_exec = pmap_attr_fetch(pg) & PTE_EXEC; 91396250Sbenno } 91496250Sbenno } 91596250Sbenno 91696250Sbenno 91796250Sbenno /* 91896250Sbenno * Assume the page is cache inhibited and access is guarded unless 91996250Sbenno * it's in our available memory array. 92096250Sbenno */ 92190643Sbenno pte_lo = PTE_I | PTE_G; 92297346Sbenno for (i = 0; i < pregions_sz; i++) { 92397346Sbenno if ((VM_PAGE_TO_PHYS(m) >= pregions[i].mr_start) && 92497346Sbenno (VM_PAGE_TO_PHYS(m) < 92597346Sbenno (pregions[i].mr_start + pregions[i].mr_size))) { 92696250Sbenno pte_lo &= ~(PTE_I | PTE_G); 92796250Sbenno break; 92896250Sbenno } 92996250Sbenno } 93077957Sbenno 93190643Sbenno if (prot & VM_PROT_WRITE) 93290643Sbenno pte_lo |= PTE_BW; 93390643Sbenno else 93490643Sbenno pte_lo |= PTE_BR; 93577957Sbenno 93696250Sbenno pvo_flags |= (prot & VM_PROT_EXECUTE); 93777957Sbenno 93890643Sbenno if (wired) 93990643Sbenno pvo_flags |= PVO_WIRED; 94077957Sbenno 94196250Sbenno error = pmap_pvo_enter(pmap, zone, pvo_head, va, VM_PAGE_TO_PHYS(m), 94296250Sbenno pte_lo, pvo_flags); 94390643Sbenno 94496250Sbenno /* 94596250Sbenno * Flush the real page from the instruction cache if this page is 94696250Sbenno * mapped executable and cacheable and was not previously mapped (or 94796250Sbenno * was not mapped executable). 94896250Sbenno */ 94996250Sbenno if (error == 0 && (pvo_flags & PVO_EXECUTABLE) && 95096250Sbenno (pte_lo & PTE_I) == 0 && was_exec == 0) { 95177957Sbenno /* 95290643Sbenno * Flush the real memory from the cache. 95377957Sbenno */ 95496250Sbenno pmap_syncicache(VM_PAGE_TO_PHYS(m), PAGE_SIZE); 95596250Sbenno if (pg != NULL) 95696250Sbenno pmap_attr_save(pg, PTE_EXEC); 95777957Sbenno } 95877957Sbenno} 95977957Sbenno 96090643Sbennovm_offset_t 96196353Sbennopmap_extract(pmap_t pm, vm_offset_t va) 96277957Sbenno{ 96396353Sbenno struct pvo_entry *pvo; 96496353Sbenno 96596353Sbenno pvo = pmap_pvo_find_va(pm, va & ~ADDR_POFF, NULL); 96696353Sbenno 96796353Sbenno if (pvo != NULL) { 96896353Sbenno return ((pvo->pvo_pte.pte_lo & PTE_RPGN) | (va & ADDR_POFF)); 96996353Sbenno } 97096353Sbenno 97190643Sbenno return (0); 97277957Sbenno} 97377957Sbenno 97477957Sbenno/* 97590643Sbenno * Grow the number of kernel page table entries. Unneeded. 97677957Sbenno */ 97790643Sbennovoid 97890643Sbennopmap_growkernel(vm_offset_t addr) 97977957Sbenno{ 98090643Sbenno} 98177957Sbenno 98290643Sbennovoid 98390643Sbennopmap_init(vm_offset_t phys_start, vm_offset_t phys_end) 98490643Sbenno{ 98577957Sbenno 98694753Sbenno CTR0(KTR_PMAP, "pmap_init"); 98777957Sbenno} 98877957Sbenno 98990643Sbennovoid 99090643Sbennopmap_init2(void) 99177957Sbenno{ 99277957Sbenno 99394753Sbenno CTR0(KTR_PMAP, "pmap_init2"); 99492521Sbenno 99592654Sjeff pmap_pvo_obj = vm_object_allocate(OBJT_PHYS, 16); 99692654Sjeff pmap_pvo_count = 0; 99792847Sjeff pmap_upvo_zone = uma_zcreate("UPVO entry", sizeof (struct pvo_entry), 99892847Sjeff NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0); 99992654Sjeff uma_zone_set_allocf(pmap_upvo_zone, pmap_pvo_allocf); 100092847Sjeff pmap_mpvo_zone = uma_zcreate("MPVO entry", sizeof(struct pvo_entry), 100192847Sjeff NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0); 100292654Sjeff uma_zone_set_allocf(pmap_mpvo_zone, pmap_pvo_allocf); 100390643Sbenno pmap_initialized = TRUE; 100477957Sbenno} 100577957Sbenno 100690643Sbennoboolean_t 100790643Sbennopmap_is_modified(vm_page_t m) 100890643Sbenno{ 100996353Sbenno 101096353Sbenno if (m->flags & PG_FICTITIOUS) 101196353Sbenno return (FALSE); 101296353Sbenno 101396353Sbenno return (pmap_query_bit(m, PTE_CHG)); 101490643Sbenno} 101590643Sbenno 101690643Sbennovoid 101790643Sbennopmap_clear_reference(vm_page_t m) 101890643Sbenno{ 101990643Sbenno TODO; 102090643Sbenno} 102190643Sbenno 102291403Ssilby/* 102391403Ssilby * pmap_ts_referenced: 102491403Ssilby * 102591403Ssilby * Return a count of reference bits for a page, clearing those bits. 102691403Ssilby * It is not necessary for every reference bit to be cleared, but it 102791403Ssilby * is necessary that 0 only be returned when there are truly no 102891403Ssilby * reference bits set. 102991403Ssilby * 103091403Ssilby * XXX: The exact number of bits to check and clear is a matter that 103191403Ssilby * should be tested and standardized at some point in the future for 103291403Ssilby * optimal aging of shared pages. 103391403Ssilby */ 103491403Ssilby 103590643Sbennoint 103690643Sbennopmap_ts_referenced(vm_page_t m) 103790643Sbenno{ 103890643Sbenno TODO; 103990643Sbenno return (0); 104090643Sbenno} 104190643Sbenno 104277957Sbenno/* 104390643Sbenno * Map a wired page into kernel virtual address space. 104477957Sbenno */ 104577957Sbennovoid 104690643Sbennopmap_kenter(vm_offset_t va, vm_offset_t pa) 104777957Sbenno{ 104890643Sbenno u_int pte_lo; 104990643Sbenno int error; 105090643Sbenno int i; 105177957Sbenno 105290643Sbenno#if 0 105390643Sbenno if (va < VM_MIN_KERNEL_ADDRESS) 105490643Sbenno panic("pmap_kenter: attempt to enter non-kernel address %#x", 105590643Sbenno va); 105690643Sbenno#endif 105777957Sbenno 105890643Sbenno pte_lo = PTE_I | PTE_G | PTE_BW; 105990643Sbenno for (i = 0; phys_avail[i + 2] != 0; i += 2) { 106090643Sbenno if (pa >= phys_avail[i] && pa < phys_avail[i + 1]) { 106190643Sbenno pte_lo &= ~(PTE_I | PTE_G); 106277957Sbenno break; 106377957Sbenno } 106477957Sbenno } 106577957Sbenno 106690643Sbenno error = pmap_pvo_enter(kernel_pmap, pmap_upvo_zone, 106790643Sbenno &pmap_pvo_kunmanaged, va, pa, pte_lo, PVO_WIRED); 106890643Sbenno 106990643Sbenno if (error != 0 && error != ENOENT) 107090643Sbenno panic("pmap_kenter: failed to enter va %#x pa %#x: %d", va, 107190643Sbenno pa, error); 107290643Sbenno 107377957Sbenno /* 107490643Sbenno * Flush the real memory from the instruction cache. 107577957Sbenno */ 107690643Sbenno if ((pte_lo & (PTE_I | PTE_G)) == 0) { 107790643Sbenno pmap_syncicache(pa, PAGE_SIZE); 107877957Sbenno } 107977957Sbenno} 108077957Sbenno 108194838Sbenno/* 108294838Sbenno * Extract the physical page address associated with the given kernel virtual 108394838Sbenno * address. 108494838Sbenno */ 108590643Sbennovm_offset_t 108690643Sbennopmap_kextract(vm_offset_t va) 108777957Sbenno{ 108894838Sbenno struct pvo_entry *pvo; 108994838Sbenno 109094838Sbenno pvo = pmap_pvo_find_va(kernel_pmap, va & ~ADDR_POFF, NULL); 109194838Sbenno if (pvo == NULL) { 109294838Sbenno return (0); 109394838Sbenno } 109494838Sbenno 109594838Sbenno return ((pvo->pvo_pte.pte_lo & PTE_RPGN) | (va & ADDR_POFF)); 109677957Sbenno} 109777957Sbenno 109891456Sbenno/* 109991456Sbenno * Remove a wired page from kernel virtual address space. 110091456Sbenno */ 110177957Sbennovoid 110277957Sbennopmap_kremove(vm_offset_t va) 110377957Sbenno{ 110491456Sbenno 110591456Sbenno pmap_remove(kernel_pmap, va, roundup(va, PAGE_SIZE)); 110677957Sbenno} 110777957Sbenno 110877957Sbenno/* 110990643Sbenno * Map a range of physical addresses into kernel virtual address space. 111090643Sbenno * 111190643Sbenno * The value passed in *virt is a suggested virtual address for the mapping. 111290643Sbenno * Architectures which can support a direct-mapped physical to virtual region 111390643Sbenno * can return the appropriate address within that region, leaving '*virt' 111490643Sbenno * unchanged. We cannot and therefore do not; *virt is updated with the 111590643Sbenno * first usable address after the mapped region. 111677957Sbenno */ 111790643Sbennovm_offset_t 111890643Sbennopmap_map(vm_offset_t *virt, vm_offset_t pa_start, vm_offset_t pa_end, int prot) 111977957Sbenno{ 112090643Sbenno vm_offset_t sva, va; 112177957Sbenno 112290643Sbenno sva = *virt; 112390643Sbenno va = sva; 112490643Sbenno for (; pa_start < pa_end; pa_start += PAGE_SIZE, va += PAGE_SIZE) 112590643Sbenno pmap_kenter(va, pa_start); 112690643Sbenno *virt = va; 112790643Sbenno return (sva); 112877957Sbenno} 112977957Sbenno 113090643Sbennoint 113190643Sbennopmap_mincore(pmap_t pmap, vm_offset_t addr) 113277957Sbenno{ 113390643Sbenno TODO; 113490643Sbenno return (0); 113577957Sbenno} 113677957Sbenno 113790643Sbenno/* 113890643Sbenno * Create the uarea for a new process. 113990643Sbenno * This routine directly affects the fork perf for a process. 114077957Sbenno */ 114177957Sbennovoid 114290643Sbennopmap_new_proc(struct proc *p) 114377957Sbenno{ 114490643Sbenno vm_object_t upobj; 114590643Sbenno vm_offset_t up; 114690643Sbenno vm_page_t m; 114790643Sbenno u_int i; 114877957Sbenno 114977957Sbenno /* 115090643Sbenno * Allocate the object for the upages. 115177957Sbenno */ 115290643Sbenno upobj = p->p_upages_obj; 115390643Sbenno if (upobj == NULL) { 115490643Sbenno upobj = vm_object_allocate(OBJT_DEFAULT, UAREA_PAGES); 115590643Sbenno p->p_upages_obj = upobj; 115677957Sbenno } 115777957Sbenno 115890643Sbenno /* 115990643Sbenno * Get a kernel virtual address for the uarea for this process. 116090643Sbenno */ 116190643Sbenno up = (vm_offset_t)p->p_uarea; 116290643Sbenno if (up == 0) { 116390643Sbenno up = kmem_alloc_nofault(kernel_map, UAREA_PAGES * PAGE_SIZE); 116490643Sbenno if (up == 0) 116590643Sbenno panic("pmap_new_proc: upage allocation failed"); 116690643Sbenno p->p_uarea = (struct user *)up; 116777957Sbenno } 116877957Sbenno 116990643Sbenno for (i = 0; i < UAREA_PAGES; i++) { 117090643Sbenno /* 117190643Sbenno * Get a uarea page. 117290643Sbenno */ 117390643Sbenno m = vm_page_grab(upobj, i, VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 117477957Sbenno 117590643Sbenno /* 117690643Sbenno * Wire the page. 117790643Sbenno */ 117890643Sbenno m->wire_count++; 117977957Sbenno 118090643Sbenno /* 118190643Sbenno * Enter the page into the kernel address space. 118290643Sbenno */ 118390643Sbenno pmap_kenter(up + i * PAGE_SIZE, VM_PAGE_TO_PHYS(m)); 118477957Sbenno 118590643Sbenno vm_page_wakeup(m); 118690643Sbenno vm_page_flag_clear(m, PG_ZERO); 118790643Sbenno vm_page_flag_set(m, PG_MAPPED | PG_WRITEABLE); 118890643Sbenno m->valid = VM_PAGE_BITS_ALL; 118977957Sbenno } 119090643Sbenno} 119177957Sbenno 119290643Sbennovoid 119394838Sbennopmap_object_init_pt(pmap_t pm, vm_offset_t addr, vm_object_t object, 119490643Sbenno vm_pindex_t pindex, vm_size_t size, int limit) 119590643Sbenno{ 119694838Sbenno 119794838Sbenno KASSERT(pm == &curproc->p_vmspace->vm_pmap || pm == kernel_pmap, 119894838Sbenno ("pmap_remove_pages: non current pmap")); 119994838Sbenno /* XXX */ 120077957Sbenno} 120177957Sbenno 120277957Sbenno/* 120390643Sbenno * Lower the permission for all mappings to a given page. 120477957Sbenno */ 120577957Sbennovoid 120677957Sbennopmap_page_protect(vm_page_t m, vm_prot_t prot) 120777957Sbenno{ 120890643Sbenno struct pvo_head *pvo_head; 120990643Sbenno struct pvo_entry *pvo, *next_pvo; 121090643Sbenno struct pte *pt; 121177957Sbenno 121290643Sbenno /* 121390643Sbenno * Since the routine only downgrades protection, if the 121490643Sbenno * maximal protection is desired, there isn't any change 121590643Sbenno * to be made. 121690643Sbenno */ 121790643Sbenno if ((prot & (VM_PROT_READ|VM_PROT_WRITE)) == 121890643Sbenno (VM_PROT_READ|VM_PROT_WRITE)) 121977957Sbenno return; 122077957Sbenno 122190643Sbenno pvo_head = vm_page_to_pvoh(m); 122290643Sbenno for (pvo = LIST_FIRST(pvo_head); pvo != NULL; pvo = next_pvo) { 122390643Sbenno next_pvo = LIST_NEXT(pvo, pvo_vlink); 122490643Sbenno PMAP_PVO_CHECK(pvo); /* sanity check */ 122590643Sbenno 122690643Sbenno /* 122790643Sbenno * Downgrading to no mapping at all, we just remove the entry. 122890643Sbenno */ 122990643Sbenno if ((prot & VM_PROT_READ) == 0) { 123090643Sbenno pmap_pvo_remove(pvo, -1); 123190643Sbenno continue; 123277957Sbenno } 123390643Sbenno 123490643Sbenno /* 123590643Sbenno * If EXEC permission is being revoked, just clear the flag 123690643Sbenno * in the PVO. 123790643Sbenno */ 123890643Sbenno if ((prot & VM_PROT_EXECUTE) == 0) 123990643Sbenno pvo->pvo_vaddr &= ~PVO_EXECUTABLE; 124090643Sbenno 124190643Sbenno /* 124290643Sbenno * If this entry is already RO, don't diddle with the page 124390643Sbenno * table. 124490643Sbenno */ 124590643Sbenno if ((pvo->pvo_pte.pte_lo & PTE_PP) == PTE_BR) { 124690643Sbenno PMAP_PVO_CHECK(pvo); 124790643Sbenno continue; 124877957Sbenno } 124990643Sbenno 125090643Sbenno /* 125190643Sbenno * Grab the PTE before we diddle the bits so pvo_to_pte can 125290643Sbenno * verify the pte contents are as expected. 125390643Sbenno */ 125490643Sbenno pt = pmap_pvo_to_pte(pvo, -1); 125590643Sbenno pvo->pvo_pte.pte_lo &= ~PTE_PP; 125690643Sbenno pvo->pvo_pte.pte_lo |= PTE_BR; 125790643Sbenno if (pt != NULL) 125890643Sbenno pmap_pte_change(pt, &pvo->pvo_pte, pvo->pvo_vaddr); 125990643Sbenno PMAP_PVO_CHECK(pvo); /* sanity check */ 126077957Sbenno } 126177957Sbenno} 126277957Sbenno 126377957Sbenno/* 126490643Sbenno * Make the specified page pageable (or not). Unneeded. 126577957Sbenno */ 126677957Sbennovoid 126790643Sbennopmap_pageable(pmap_t pmap, vm_offset_t sva, vm_offset_t eva, 126890643Sbenno boolean_t pageable) 126977957Sbenno{ 127090643Sbenno} 127177957Sbenno 127291403Ssilby/* 127391403Ssilby * Returns true if the pmap's pv is one of the first 127491403Ssilby * 16 pvs linked to from this page. This count may 127591403Ssilby * be changed upwards or downwards in the future; it 127691403Ssilby * is only necessary that true be returned for a small 127791403Ssilby * subset of pmaps for proper page aging. 127891403Ssilby */ 127990643Sbennoboolean_t 128091403Ssilbypmap_page_exists_quick(pmap_t pmap, vm_page_t m) 128190643Sbenno{ 128290643Sbenno TODO; 128390643Sbenno return (0); 128490643Sbenno} 128577957Sbenno 128690643Sbennostatic u_int pmap_vsidcontext; 128777957Sbenno 128890643Sbennovoid 128990643Sbennopmap_pinit(pmap_t pmap) 129090643Sbenno{ 129190643Sbenno int i, mask; 129290643Sbenno u_int entropy; 129377957Sbenno 129490643Sbenno entropy = 0; 129590643Sbenno __asm __volatile("mftb %0" : "=r"(entropy)); 129677957Sbenno 129790643Sbenno /* 129890643Sbenno * Allocate some segment registers for this pmap. 129990643Sbenno */ 130090643Sbenno for (i = 0; i < NPMAPS; i += VSID_NBPW) { 130190643Sbenno u_int hash, n; 130277957Sbenno 130377957Sbenno /* 130490643Sbenno * Create a new value by mutiplying by a prime and adding in 130590643Sbenno * entropy from the timebase register. This is to make the 130690643Sbenno * VSID more random so that the PT hash function collides 130790643Sbenno * less often. (Note that the prime casues gcc to do shifts 130890643Sbenno * instead of a multiply.) 130977957Sbenno */ 131090643Sbenno pmap_vsidcontext = (pmap_vsidcontext * 0x1105) + entropy; 131190643Sbenno hash = pmap_vsidcontext & (NPMAPS - 1); 131290643Sbenno if (hash == 0) /* 0 is special, avoid it */ 131390643Sbenno continue; 131490643Sbenno n = hash >> 5; 131590643Sbenno mask = 1 << (hash & (VSID_NBPW - 1)); 131690643Sbenno hash = (pmap_vsidcontext & 0xfffff); 131790643Sbenno if (pmap_vsid_bitmap[n] & mask) { /* collision? */ 131890643Sbenno /* anything free in this bucket? */ 131990643Sbenno if (pmap_vsid_bitmap[n] == 0xffffffff) { 132090643Sbenno entropy = (pmap_vsidcontext >> 20); 132190643Sbenno continue; 132290643Sbenno } 132390643Sbenno i = ffs(~pmap_vsid_bitmap[i]) - 1; 132490643Sbenno mask = 1 << i; 132590643Sbenno hash &= 0xfffff & ~(VSID_NBPW - 1); 132690643Sbenno hash |= i; 132777957Sbenno } 132890643Sbenno pmap_vsid_bitmap[n] |= mask; 132990643Sbenno for (i = 0; i < 16; i++) 133090643Sbenno pmap->pm_sr[i] = VSID_MAKE(i, hash); 133190643Sbenno return; 133290643Sbenno } 133377957Sbenno 133490643Sbenno panic("pmap_pinit: out of segments"); 133577957Sbenno} 133677957Sbenno 133777957Sbenno/* 133890643Sbenno * Initialize the pmap associated with process 0. 133977957Sbenno */ 134077957Sbennovoid 134190643Sbennopmap_pinit0(pmap_t pm) 134277957Sbenno{ 134377957Sbenno 134490643Sbenno pmap_pinit(pm); 134590643Sbenno bzero(&pm->pm_stats, sizeof(pm->pm_stats)); 134677957Sbenno} 134777957Sbenno 134877957Sbennovoid 134990643Sbennopmap_pinit2(pmap_t pmap) 135077957Sbenno{ 135190643Sbenno /* XXX: Remove this stub when no longer called */ 135290643Sbenno} 135377957Sbenno 135490643Sbennovoid 135591802Sbennopmap_prefault(pmap_t pm, vm_offset_t va, vm_map_entry_t entry) 135690643Sbenno{ 135791802Sbenno KASSERT(pm == &curproc->p_vmspace->vm_pmap || pm == kernel_pmap, 135891802Sbenno ("pmap_prefault: non current pmap")); 135991802Sbenno /* XXX */ 136090643Sbenno} 136177957Sbenno 136294838Sbenno/* 136394838Sbenno * Set the physical protection on the specified range of this map as requested. 136494838Sbenno */ 136590643Sbennovoid 136694838Sbennopmap_protect(pmap_t pm, vm_offset_t sva, vm_offset_t eva, vm_prot_t prot) 136790643Sbenno{ 136894838Sbenno struct pvo_entry *pvo; 136994838Sbenno struct pte *pt; 137094838Sbenno int pteidx; 137194838Sbenno 137294838Sbenno CTR4(KTR_PMAP, "pmap_protect: pm=%p sva=%#x eva=%#x prot=%#x", pm, sva, 137394838Sbenno eva, prot); 137494838Sbenno 137594838Sbenno 137694838Sbenno KASSERT(pm == &curproc->p_vmspace->vm_pmap || pm == kernel_pmap, 137794838Sbenno ("pmap_protect: non current pmap")); 137894838Sbenno 137994838Sbenno if ((prot & VM_PROT_READ) == VM_PROT_NONE) { 138094838Sbenno pmap_remove(pm, sva, eva); 138194838Sbenno return; 138294838Sbenno } 138394838Sbenno 138494838Sbenno for (; sva < eva; sva += PAGE_SIZE) { 138594838Sbenno pvo = pmap_pvo_find_va(pm, sva, &pteidx); 138694838Sbenno if (pvo == NULL) 138794838Sbenno continue; 138894838Sbenno 138994838Sbenno if ((prot & VM_PROT_EXECUTE) == 0) 139094838Sbenno pvo->pvo_vaddr &= ~PVO_EXECUTABLE; 139194838Sbenno 139294838Sbenno /* 139394838Sbenno * Grab the PTE pointer before we diddle with the cached PTE 139494838Sbenno * copy. 139594838Sbenno */ 139694838Sbenno pt = pmap_pvo_to_pte(pvo, pteidx); 139794838Sbenno /* 139894838Sbenno * Change the protection of the page. 139994838Sbenno */ 140094838Sbenno pvo->pvo_pte.pte_lo &= ~PTE_PP; 140194838Sbenno pvo->pvo_pte.pte_lo |= PTE_BR; 140294838Sbenno 140394838Sbenno /* 140494838Sbenno * If the PVO is in the page table, update that pte as well. 140594838Sbenno */ 140694838Sbenno if (pt != NULL) 140794838Sbenno pmap_pte_change(pt, &pvo->pvo_pte, pvo->pvo_vaddr); 140894838Sbenno } 140977957Sbenno} 141077957Sbenno 141190643Sbennovm_offset_t 141290643Sbennopmap_phys_address(int ppn) 141377957Sbenno{ 141490643Sbenno TODO; 141577957Sbenno return (0); 141677957Sbenno} 141777957Sbenno 141891456Sbenno/* 141991456Sbenno * Map a list of wired pages into kernel virtual address space. This is 142091456Sbenno * intended for temporary mappings which do not need page modification or 142191456Sbenno * references recorded. Existing mappings in the region are overwritten. 142291456Sbenno */ 142390643Sbennovoid 142490643Sbennopmap_qenter(vm_offset_t va, vm_page_t *m, int count) 142577957Sbenno{ 142690643Sbenno int i; 142777957Sbenno 142890643Sbenno for (i = 0; i < count; i++, va += PAGE_SIZE) 142990643Sbenno pmap_kenter(va, VM_PAGE_TO_PHYS(m[i])); 143090643Sbenno} 143177957Sbenno 143291456Sbenno/* 143391456Sbenno * Remove page mappings from kernel virtual address space. Intended for 143491456Sbenno * temporary mappings entered by pmap_qenter. 143591456Sbenno */ 143690643Sbennovoid 143790643Sbennopmap_qremove(vm_offset_t va, int count) 143890643Sbenno{ 143991456Sbenno int i; 144091456Sbenno 144191456Sbenno for (i = 0; i < count; i++, va += PAGE_SIZE) 144291456Sbenno pmap_kremove(va); 144377957Sbenno} 144477957Sbenno 144590643Sbennovoid 144690643Sbennopmap_release(pmap_t pmap) 144790643Sbenno{ 144890643Sbenno TODO; 144977957Sbenno} 145077957Sbenno 145191456Sbenno/* 145291456Sbenno * Remove the given range of addresses from the specified map. 145391456Sbenno */ 145490643Sbennovoid 145591456Sbennopmap_remove(pmap_t pm, vm_offset_t sva, vm_offset_t eva) 145677957Sbenno{ 145791456Sbenno struct pvo_entry *pvo; 145891456Sbenno int pteidx; 145991456Sbenno 146091456Sbenno for (; sva < eva; sva += PAGE_SIZE) { 146191456Sbenno pvo = pmap_pvo_find_va(pm, sva, &pteidx); 146291456Sbenno if (pvo != NULL) { 146391456Sbenno pmap_pvo_remove(pvo, pteidx); 146491456Sbenno } 146591456Sbenno } 146677957Sbenno} 146777957Sbenno 146894838Sbenno/* 146994838Sbenno * Remove all pages from specified address space, this aids process exit 147094838Sbenno * speeds. This is much faster than pmap_remove in the case of running down 147194838Sbenno * an entire address space. Only works for the current pmap. 147294838Sbenno */ 147390643Sbennovoid 147494838Sbennopmap_remove_pages(pmap_t pm, vm_offset_t sva, vm_offset_t eva) 147577957Sbenno{ 147694838Sbenno 147794838Sbenno KASSERT(pm == &curproc->p_vmspace->vm_pmap || pm == kernel_pmap, 147894838Sbenno ("pmap_remove_pages: non current pmap")); 147994838Sbenno pmap_remove(pm, sva, eva); 148077957Sbenno} 148177957Sbenno 148277957Sbennovoid 148390643Sbennopmap_swapin_proc(struct proc *p) 148477957Sbenno{ 148590643Sbenno TODO; 148677957Sbenno} 148777957Sbenno 148877957Sbennovoid 148990643Sbennopmap_swapout_proc(struct proc *p) 149077957Sbenno{ 149190643Sbenno TODO; 149277957Sbenno} 149377957Sbenno 149477957Sbenno/* 149590643Sbenno * Create the kernel stack and pcb for a new thread. 149690643Sbenno * This routine directly affects the fork perf for a process and 149790643Sbenno * create performance for a thread. 149877957Sbenno */ 149977957Sbennovoid 150090643Sbennopmap_new_thread(struct thread *td) 150177957Sbenno{ 150290643Sbenno vm_object_t ksobj; 150390643Sbenno vm_offset_t ks; 150490643Sbenno vm_page_t m; 150590643Sbenno u_int i; 150680431Speter 150790643Sbenno /* 150890643Sbenno * Allocate object for the kstack. 150990643Sbenno */ 151090643Sbenno ksobj = td->td_kstack_obj; 151190643Sbenno if (ksobj == NULL) { 151290643Sbenno ksobj = vm_object_allocate(OBJT_DEFAULT, KSTACK_PAGES); 151390643Sbenno td->td_kstack_obj = ksobj; 151490643Sbenno } 151590643Sbenno 151690643Sbenno /* 151790643Sbenno * Get a kernel virtual address for the kstack for this thread. 151890643Sbenno */ 151990643Sbenno ks = td->td_kstack; 152090643Sbenno if (ks == 0) { 152190643Sbenno ks = kmem_alloc_nofault(kernel_map, 152290643Sbenno (KSTACK_PAGES + KSTACK_GUARD_PAGES) * PAGE_SIZE); 152390643Sbenno if (ks == 0) 152490643Sbenno panic("pmap_new_thread: kstack allocation failed"); 152590643Sbenno TLBIE(ks); 152690643Sbenno ks += KSTACK_GUARD_PAGES * PAGE_SIZE; 152790643Sbenno td->td_kstack = ks; 152890643Sbenno } 152990643Sbenno 153090643Sbenno for (i = 0; i < KSTACK_PAGES; i++) { 153190643Sbenno /* 153290643Sbenno * Get a kernel stack page. 153390643Sbenno */ 153490643Sbenno m = vm_page_grab(ksobj, i, VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 153590643Sbenno 153690643Sbenno /* 153790643Sbenno * Wire the page. 153890643Sbenno */ 153990643Sbenno m->wire_count++; 154090643Sbenno 154190643Sbenno /* 154290643Sbenno * Enter the page into the kernel address space. 154390643Sbenno */ 154490643Sbenno pmap_kenter(ks + i * PAGE_SIZE, VM_PAGE_TO_PHYS(m)); 154590643Sbenno 154690643Sbenno vm_page_wakeup(m); 154790643Sbenno vm_page_flag_clear(m, PG_ZERO); 154890643Sbenno vm_page_flag_set(m, PG_MAPPED | PG_WRITEABLE); 154990643Sbenno m->valid = VM_PAGE_BITS_ALL; 155090643Sbenno } 155177957Sbenno} 155277957Sbenno 155377957Sbennovoid 155490643Sbennopmap_dispose_proc(struct proc *p) 155577957Sbenno{ 155690643Sbenno TODO; 155777957Sbenno} 155877957Sbenno 155977957Sbennovoid 156090643Sbennopmap_dispose_thread(struct thread *td) 156177957Sbenno{ 156290643Sbenno TODO; 156377957Sbenno} 156477957Sbenno 156577957Sbennovoid 156690643Sbennopmap_swapin_thread(struct thread *td) 156783682Smp{ 156890643Sbenno TODO; 156983682Smp} 157083682Smp 157183682Smpvoid 157290643Sbennopmap_swapout_thread(struct thread *td) 157383682Smp{ 157490643Sbenno TODO; 157583682Smp} 157683682Smp 157783682Smp/* 157890643Sbenno * Allocate a physical page of memory directly from the phys_avail map. 157990643Sbenno * Can only be called from pmap_bootstrap before avail start and end are 158090643Sbenno * calculated. 158183682Smp */ 158290643Sbennostatic vm_offset_t 158390643Sbennopmap_bootstrap_alloc(vm_size_t size, u_int align) 158483682Smp{ 158590643Sbenno vm_offset_t s, e; 158690643Sbenno int i, j; 158783682Smp 158890643Sbenno size = round_page(size); 158990643Sbenno for (i = 0; phys_avail[i + 1] != 0; i += 2) { 159090643Sbenno if (align != 0) 159190643Sbenno s = (phys_avail[i] + align - 1) & ~(align - 1); 159290643Sbenno else 159390643Sbenno s = phys_avail[i]; 159490643Sbenno e = s + size; 159590643Sbenno 159690643Sbenno if (s < phys_avail[i] || e > phys_avail[i + 1]) 159790643Sbenno continue; 159890643Sbenno 159990643Sbenno if (s == phys_avail[i]) { 160090643Sbenno phys_avail[i] += size; 160190643Sbenno } else if (e == phys_avail[i + 1]) { 160290643Sbenno phys_avail[i + 1] -= size; 160390643Sbenno } else { 160490643Sbenno for (j = phys_avail_count * 2; j > i; j -= 2) { 160590643Sbenno phys_avail[j] = phys_avail[j - 2]; 160690643Sbenno phys_avail[j + 1] = phys_avail[j - 1]; 160790643Sbenno } 160890643Sbenno 160990643Sbenno phys_avail[i + 3] = phys_avail[i + 1]; 161090643Sbenno phys_avail[i + 1] = s; 161190643Sbenno phys_avail[i + 2] = e; 161290643Sbenno phys_avail_count++; 161390643Sbenno } 161490643Sbenno 161590643Sbenno return (s); 161683682Smp } 161790643Sbenno panic("pmap_bootstrap_alloc: could not allocate memory"); 161883682Smp} 161983682Smp 162083682Smp/* 162190643Sbenno * Return an unmapped pvo for a kernel virtual address. 162290643Sbenno * Used by pmap functions that operate on physical pages. 162383682Smp */ 162490643Sbennostatic struct pvo_entry * 162590643Sbennopmap_rkva_alloc(void) 162683682Smp{ 162790643Sbenno struct pvo_entry *pvo; 162890643Sbenno struct pte *pt; 162990643Sbenno vm_offset_t kva; 163090643Sbenno int pteidx; 163183682Smp 163290643Sbenno if (pmap_rkva_count == 0) 163390643Sbenno panic("pmap_rkva_alloc: no more reserved KVAs"); 163490643Sbenno 163590643Sbenno kva = pmap_rkva_start + (PAGE_SIZE * --pmap_rkva_count); 163690643Sbenno pmap_kenter(kva, 0); 163790643Sbenno 163890643Sbenno pvo = pmap_pvo_find_va(kernel_pmap, kva, &pteidx); 163990643Sbenno 164090643Sbenno if (pvo == NULL) 164190643Sbenno panic("pmap_kva_alloc: pmap_pvo_find_va failed"); 164290643Sbenno 164390643Sbenno pt = pmap_pvo_to_pte(pvo, pteidx); 164490643Sbenno 164590643Sbenno if (pt == NULL) 164690643Sbenno panic("pmap_kva_alloc: pmap_pvo_to_pte failed"); 164790643Sbenno 164890643Sbenno pmap_pte_unset(pt, &pvo->pvo_pte, pvo->pvo_vaddr); 164990643Sbenno PVO_PTEGIDX_CLR(pvo); 165090643Sbenno 165190643Sbenno pmap_pte_overflow++; 165290643Sbenno 165390643Sbenno return (pvo); 165490643Sbenno} 165590643Sbenno 165690643Sbennostatic void 165790643Sbennopmap_pa_map(struct pvo_entry *pvo, vm_offset_t pa, struct pte *saved_pt, 165890643Sbenno int *depth_p) 165990643Sbenno{ 166090643Sbenno struct pte *pt; 166190643Sbenno 166290643Sbenno /* 166390643Sbenno * If this pvo already has a valid pte, we need to save it so it can 166490643Sbenno * be restored later. We then just reload the new PTE over the old 166590643Sbenno * slot. 166690643Sbenno */ 166790643Sbenno if (saved_pt != NULL) { 166890643Sbenno pt = pmap_pvo_to_pte(pvo, -1); 166990643Sbenno 167090643Sbenno if (pt != NULL) { 167190643Sbenno pmap_pte_unset(pt, &pvo->pvo_pte, pvo->pvo_vaddr); 167290643Sbenno PVO_PTEGIDX_CLR(pvo); 167390643Sbenno pmap_pte_overflow++; 167483682Smp } 167590643Sbenno 167690643Sbenno *saved_pt = pvo->pvo_pte; 167790643Sbenno 167890643Sbenno pvo->pvo_pte.pte_lo &= ~PTE_RPGN; 167983682Smp } 168090643Sbenno 168190643Sbenno pvo->pvo_pte.pte_lo |= pa; 168290643Sbenno 168390643Sbenno if (!pmap_pte_spill(pvo->pvo_vaddr)) 168490643Sbenno panic("pmap_pa_map: could not spill pvo %p", pvo); 168590643Sbenno 168690643Sbenno if (depth_p != NULL) 168790643Sbenno (*depth_p)++; 168883682Smp} 168983682Smp 169090643Sbennostatic void 169190643Sbennopmap_pa_unmap(struct pvo_entry *pvo, struct pte *saved_pt, int *depth_p) 169277957Sbenno{ 169390643Sbenno struct pte *pt; 169477957Sbenno 169590643Sbenno pt = pmap_pvo_to_pte(pvo, -1); 169690643Sbenno 169790643Sbenno if (pt != NULL) { 169890643Sbenno pmap_pte_unset(pt, &pvo->pvo_pte, pvo->pvo_vaddr); 169990643Sbenno PVO_PTEGIDX_CLR(pvo); 170090643Sbenno pmap_pte_overflow++; 170190643Sbenno } 170290643Sbenno 170390643Sbenno pvo->pvo_pte.pte_lo &= ~PTE_RPGN; 170490643Sbenno 170590643Sbenno /* 170690643Sbenno * If there is a saved PTE and it's valid, restore it and return. 170790643Sbenno */ 170890643Sbenno if (saved_pt != NULL && (saved_pt->pte_lo & PTE_RPGN) != 0) { 170990643Sbenno if (depth_p != NULL && --(*depth_p) == 0) 171090643Sbenno panic("pmap_pa_unmap: restoring but depth == 0"); 171190643Sbenno 171290643Sbenno pvo->pvo_pte = *saved_pt; 171390643Sbenno 171490643Sbenno if (!pmap_pte_spill(pvo->pvo_vaddr)) 171590643Sbenno panic("pmap_pa_unmap: could not spill pvo %p", pvo); 171690643Sbenno } 171777957Sbenno} 171877957Sbenno 171990643Sbennostatic void 172090643Sbennopmap_syncicache(vm_offset_t pa, vm_size_t len) 172177957Sbenno{ 172290643Sbenno __syncicache((void *)pa, len); 172390643Sbenno} 172477957Sbenno 172590643Sbennostatic void 172690643Sbennotlbia(void) 172790643Sbenno{ 172890643Sbenno caddr_t i; 172990643Sbenno 173090643Sbenno SYNC(); 173190643Sbenno for (i = 0; i < (caddr_t)0x00040000; i += 0x00001000) { 173290643Sbenno TLBIE(i); 173390643Sbenno EIEIO(); 173490643Sbenno } 173590643Sbenno TLBSYNC(); 173690643Sbenno SYNC(); 173777957Sbenno} 173877957Sbenno 173990643Sbennostatic int 174092847Sjeffpmap_pvo_enter(pmap_t pm, uma_zone_t zone, struct pvo_head *pvo_head, 174190643Sbenno vm_offset_t va, vm_offset_t pa, u_int pte_lo, int flags) 174277957Sbenno{ 174390643Sbenno struct pvo_entry *pvo; 174490643Sbenno u_int sr; 174590643Sbenno int first; 174690643Sbenno u_int ptegidx; 174790643Sbenno int i; 174877957Sbenno 174990643Sbenno pmap_pvo_enter_calls++; 175096250Sbenno first = 0; 175190643Sbenno 175290643Sbenno /* 175390643Sbenno * Compute the PTE Group index. 175490643Sbenno */ 175590643Sbenno va &= ~ADDR_POFF; 175690643Sbenno sr = va_to_sr(pm->pm_sr, va); 175790643Sbenno ptegidx = va_to_pteg(sr, va); 175890643Sbenno 175990643Sbenno /* 176090643Sbenno * Remove any existing mapping for this page. Reuse the pvo entry if 176190643Sbenno * there is a mapping. 176290643Sbenno */ 176390643Sbenno LIST_FOREACH(pvo, &pmap_pvo_table[ptegidx], pvo_olink) { 176490643Sbenno if (pvo->pvo_pmap == pm && PVO_VADDR(pvo) == va) { 176596334Sbenno if ((pvo->pvo_pte.pte_lo & PTE_RPGN) == pa && 176696334Sbenno (pvo->pvo_pte.pte_lo & PTE_PP) == 176796334Sbenno (pte_lo & PTE_PP)) { 176892521Sbenno return (0); 176996334Sbenno } 177090643Sbenno pmap_pvo_remove(pvo, -1); 177190643Sbenno break; 177290643Sbenno } 177390643Sbenno } 177490643Sbenno 177590643Sbenno /* 177690643Sbenno * If we aren't overwriting a mapping, try to allocate. 177790643Sbenno */ 177892521Sbenno if (pmap_initialized) { 177992847Sjeff pvo = uma_zalloc(zone, M_NOWAIT); 178092521Sbenno } else { 178192521Sbenno if (pmap_bpvo_pool_index >= pmap_bpvo_pool_count) { 178292521Sbenno pmap_bpvo_pool = (struct pvo_entry *) 178392521Sbenno pmap_bootstrap_alloc(PAGE_SIZE, 0); 178492521Sbenno pmap_bpvo_pool_index = 0; 178592521Sbenno } 178692521Sbenno pvo = &pmap_bpvo_pool[pmap_bpvo_pool_index]; 178792521Sbenno pmap_bpvo_pool_index++; 178892521Sbenno pvo->pvo_vaddr |= PVO_BOOTSTRAP; 178992521Sbenno } 179090643Sbenno 179190643Sbenno if (pvo == NULL) { 179290643Sbenno return (ENOMEM); 179390643Sbenno } 179490643Sbenno 179590643Sbenno pmap_pvo_entries++; 179690643Sbenno pvo->pvo_vaddr = va; 179790643Sbenno pvo->pvo_pmap = pm; 179890643Sbenno LIST_INSERT_HEAD(&pmap_pvo_table[ptegidx], pvo, pvo_olink); 179990643Sbenno pvo->pvo_vaddr &= ~ADDR_POFF; 180090643Sbenno if (flags & VM_PROT_EXECUTE) 180190643Sbenno pvo->pvo_vaddr |= PVO_EXECUTABLE; 180290643Sbenno if (flags & PVO_WIRED) 180390643Sbenno pvo->pvo_vaddr |= PVO_WIRED; 180490643Sbenno if (pvo_head != &pmap_pvo_kunmanaged) 180590643Sbenno pvo->pvo_vaddr |= PVO_MANAGED; 180690643Sbenno pmap_pte_create(&pvo->pvo_pte, sr, va, pa | pte_lo); 180790643Sbenno 180890643Sbenno /* 180990643Sbenno * Remember if the list was empty and therefore will be the first 181090643Sbenno * item. 181190643Sbenno */ 181296250Sbenno if (LIST_FIRST(pvo_head) == NULL) 181396250Sbenno first = 1; 181490643Sbenno 181590643Sbenno LIST_INSERT_HEAD(pvo_head, pvo, pvo_vlink); 181690643Sbenno if (pvo->pvo_pte.pte_lo & PVO_WIRED) 181790643Sbenno pvo->pvo_pmap->pm_stats.wired_count++; 181890643Sbenno pvo->pvo_pmap->pm_stats.resident_count++; 181990643Sbenno 182090643Sbenno /* 182190643Sbenno * We hope this succeeds but it isn't required. 182290643Sbenno */ 182390643Sbenno i = pmap_pte_insert(ptegidx, &pvo->pvo_pte); 182490643Sbenno if (i >= 0) { 182590643Sbenno PVO_PTEGIDX_SET(pvo, i); 182690643Sbenno } else { 182790643Sbenno panic("pmap_pvo_enter: overflow"); 182890643Sbenno pmap_pte_overflow++; 182990643Sbenno } 183090643Sbenno 183190643Sbenno return (first ? ENOENT : 0); 183277957Sbenno} 183377957Sbenno 183490643Sbennostatic void 183590643Sbennopmap_pvo_remove(struct pvo_entry *pvo, int pteidx) 183677957Sbenno{ 183790643Sbenno struct pte *pt; 183877957Sbenno 183990643Sbenno /* 184090643Sbenno * If there is an active pte entry, we need to deactivate it (and 184190643Sbenno * save the ref & cfg bits). 184290643Sbenno */ 184390643Sbenno pt = pmap_pvo_to_pte(pvo, pteidx); 184490643Sbenno if (pt != NULL) { 184590643Sbenno pmap_pte_unset(pt, &pvo->pvo_pte, pvo->pvo_vaddr); 184690643Sbenno PVO_PTEGIDX_CLR(pvo); 184790643Sbenno } else { 184890643Sbenno pmap_pte_overflow--; 184990643Sbenno } 185090643Sbenno 185190643Sbenno /* 185290643Sbenno * Update our statistics. 185390643Sbenno */ 185490643Sbenno pvo->pvo_pmap->pm_stats.resident_count--; 185590643Sbenno if (pvo->pvo_pte.pte_lo & PVO_WIRED) 185690643Sbenno pvo->pvo_pmap->pm_stats.wired_count--; 185790643Sbenno 185890643Sbenno /* 185990643Sbenno * Save the REF/CHG bits into their cache if the page is managed. 186090643Sbenno */ 186190643Sbenno if (pvo->pvo_vaddr & PVO_MANAGED) { 186290643Sbenno struct vm_page *pg; 186390643Sbenno 186492067Sbenno pg = PHYS_TO_VM_PAGE(pvo->pvo_pte.pte_lo & PTE_RPGN); 186590643Sbenno if (pg != NULL) { 186690643Sbenno pmap_attr_save(pg, pvo->pvo_pte.pte_lo & 186790643Sbenno (PTE_REF | PTE_CHG)); 186890643Sbenno } 186990643Sbenno } 187090643Sbenno 187190643Sbenno /* 187290643Sbenno * Remove this PVO from the PV list. 187390643Sbenno */ 187490643Sbenno LIST_REMOVE(pvo, pvo_vlink); 187590643Sbenno 187690643Sbenno /* 187790643Sbenno * Remove this from the overflow list and return it to the pool 187890643Sbenno * if we aren't going to reuse it. 187990643Sbenno */ 188090643Sbenno LIST_REMOVE(pvo, pvo_olink); 188192521Sbenno if (!(pvo->pvo_vaddr & PVO_BOOTSTRAP)) 188292847Sjeff uma_zfree(pvo->pvo_vaddr & PVO_MANAGED ? pmap_mpvo_zone : 188392521Sbenno pmap_upvo_zone, pvo); 188490643Sbenno pmap_pvo_entries--; 188590643Sbenno pmap_pvo_remove_calls++; 188677957Sbenno} 188777957Sbenno 188890643Sbennostatic __inline int 188990643Sbennopmap_pvo_pte_index(const struct pvo_entry *pvo, int ptegidx) 189077957Sbenno{ 189190643Sbenno int pteidx; 189277957Sbenno 189390643Sbenno /* 189490643Sbenno * We can find the actual pte entry without searching by grabbing 189590643Sbenno * the PTEG index from 3 unused bits in pte_lo[11:9] and by 189690643Sbenno * noticing the HID bit. 189790643Sbenno */ 189890643Sbenno pteidx = ptegidx * 8 + PVO_PTEGIDX_GET(pvo); 189990643Sbenno if (pvo->pvo_pte.pte_hi & PTE_HID) 190090643Sbenno pteidx ^= pmap_pteg_mask * 8; 190190643Sbenno 190290643Sbenno return (pteidx); 190377957Sbenno} 190477957Sbenno 190590643Sbennostatic struct pvo_entry * 190690643Sbennopmap_pvo_find_va(pmap_t pm, vm_offset_t va, int *pteidx_p) 190777957Sbenno{ 190890643Sbenno struct pvo_entry *pvo; 190990643Sbenno int ptegidx; 191090643Sbenno u_int sr; 191177957Sbenno 191290643Sbenno va &= ~ADDR_POFF; 191390643Sbenno sr = va_to_sr(pm->pm_sr, va); 191490643Sbenno ptegidx = va_to_pteg(sr, va); 191590643Sbenno 191690643Sbenno LIST_FOREACH(pvo, &pmap_pvo_table[ptegidx], pvo_olink) { 191790643Sbenno if (pvo->pvo_pmap == pm && PVO_VADDR(pvo) == va) { 191890643Sbenno if (pteidx_p) 191990643Sbenno *pteidx_p = pmap_pvo_pte_index(pvo, ptegidx); 192090643Sbenno return (pvo); 192190643Sbenno } 192290643Sbenno } 192390643Sbenno 192490643Sbenno return (NULL); 192577957Sbenno} 192677957Sbenno 192790643Sbennostatic struct pte * 192890643Sbennopmap_pvo_to_pte(const struct pvo_entry *pvo, int pteidx) 192977957Sbenno{ 193090643Sbenno struct pte *pt; 193177957Sbenno 193290643Sbenno /* 193390643Sbenno * If we haven't been supplied the ptegidx, calculate it. 193490643Sbenno */ 193590643Sbenno if (pteidx == -1) { 193690643Sbenno int ptegidx; 193790643Sbenno u_int sr; 193877957Sbenno 193990643Sbenno sr = va_to_sr(pvo->pvo_pmap->pm_sr, pvo->pvo_vaddr); 194090643Sbenno ptegidx = va_to_pteg(sr, pvo->pvo_vaddr); 194190643Sbenno pteidx = pmap_pvo_pte_index(pvo, ptegidx); 194290643Sbenno } 194390643Sbenno 194490643Sbenno pt = &pmap_pteg_table[pteidx >> 3].pt[pteidx & 7]; 194590643Sbenno 194690643Sbenno if ((pvo->pvo_pte.pte_hi & PTE_VALID) && !PVO_PTEGIDX_ISSET(pvo)) { 194790643Sbenno panic("pmap_pvo_to_pte: pvo %p has valid pte in pvo but no " 194890643Sbenno "valid pte index", pvo); 194990643Sbenno } 195090643Sbenno 195190643Sbenno if ((pvo->pvo_pte.pte_hi & PTE_VALID) == 0 && PVO_PTEGIDX_ISSET(pvo)) { 195290643Sbenno panic("pmap_pvo_to_pte: pvo %p has valid pte index in pvo " 195390643Sbenno "pvo but no valid pte", pvo); 195490643Sbenno } 195590643Sbenno 195690643Sbenno if ((pt->pte_hi ^ (pvo->pvo_pte.pte_hi & ~PTE_VALID)) == PTE_VALID) { 195790643Sbenno if ((pvo->pvo_pte.pte_hi & PTE_VALID) == 0) { 195890643Sbenno panic("pmap_pvo_to_pte: pvo %p has valid pte in " 195990643Sbenno "pmap_pteg_table %p but invalid in pvo", pvo, pt); 196077957Sbenno } 196190643Sbenno 196290643Sbenno if (((pt->pte_lo ^ pvo->pvo_pte.pte_lo) & ~(PTE_CHG|PTE_REF)) 196390643Sbenno != 0) { 196490643Sbenno panic("pmap_pvo_to_pte: pvo %p pte does not match " 196590643Sbenno "pte %p in pmap_pteg_table", pvo, pt); 196690643Sbenno } 196790643Sbenno 196890643Sbenno return (pt); 196977957Sbenno } 197077957Sbenno 197190643Sbenno if (pvo->pvo_pte.pte_hi & PTE_VALID) { 197290643Sbenno panic("pmap_pvo_to_pte: pvo %p has invalid pte %p in " 197390643Sbenno "pmap_pteg_table but valid in pvo", pvo, pt); 197490643Sbenno } 197577957Sbenno 197690643Sbenno return (NULL); 197777957Sbenno} 197878880Sbenno 197992654Sjeffstatic void * 198092654Sjeffpmap_pvo_allocf(uma_zone_t zone, int bytes, u_int8_t *flags, int wait) 198192654Sjeff{ 198292654Sjeff vm_page_t m; 198392654Sjeff 198492654Sjeff if (bytes != PAGE_SIZE) 198592654Sjeff panic("pmap_pvo_allocf: benno was shortsighted. hit him."); 198692654Sjeff 198792654Sjeff *flags = UMA_SLAB_PRIV; 198892654Sjeff m = vm_page_alloc(pmap_pvo_obj, pmap_pvo_count, VM_ALLOC_SYSTEM); 198992654Sjeff if (m == NULL) 199092654Sjeff return (NULL); 199192757Sbenno pmap_pvo_count++; 199292654Sjeff return ((void *)VM_PAGE_TO_PHYS(m)); 199392654Sjeff} 199492654Sjeff 199578880Sbenno/* 199690643Sbenno * XXX: THIS STUFF SHOULD BE IN pte.c? 199778880Sbenno */ 199890643Sbennoint 199990643Sbennopmap_pte_spill(vm_offset_t addr) 200078880Sbenno{ 200190643Sbenno struct pvo_entry *source_pvo, *victim_pvo; 200290643Sbenno struct pvo_entry *pvo; 200390643Sbenno int ptegidx, i, j; 200490643Sbenno u_int sr; 200590643Sbenno struct pteg *pteg; 200690643Sbenno struct pte *pt; 200778880Sbenno 200890643Sbenno pmap_pte_spills++; 200990643Sbenno 201094836Sbenno sr = mfsrin(addr); 201190643Sbenno ptegidx = va_to_pteg(sr, addr); 201290643Sbenno 201378880Sbenno /* 201490643Sbenno * Have to substitute some entry. Use the primary hash for this. 201590643Sbenno * Use low bits of timebase as random generator. 201678880Sbenno */ 201790643Sbenno pteg = &pmap_pteg_table[ptegidx]; 201890643Sbenno __asm __volatile("mftb %0" : "=r"(i)); 201990643Sbenno i &= 7; 202090643Sbenno pt = &pteg->pt[i]; 202178880Sbenno 202290643Sbenno source_pvo = NULL; 202390643Sbenno victim_pvo = NULL; 202490643Sbenno LIST_FOREACH(pvo, &pmap_pvo_table[ptegidx], pvo_olink) { 202578880Sbenno /* 202690643Sbenno * We need to find a pvo entry for this address. 202778880Sbenno */ 202890643Sbenno PMAP_PVO_CHECK(pvo); 202990643Sbenno if (source_pvo == NULL && 203090643Sbenno pmap_pte_match(&pvo->pvo_pte, sr, addr, 203190643Sbenno pvo->pvo_pte.pte_hi & PTE_HID)) { 203290643Sbenno /* 203390643Sbenno * Now found an entry to be spilled into the pteg. 203490643Sbenno * The PTE is now valid, so we know it's active. 203590643Sbenno */ 203690643Sbenno j = pmap_pte_insert(ptegidx, &pvo->pvo_pte); 203778880Sbenno 203890643Sbenno if (j >= 0) { 203990643Sbenno PVO_PTEGIDX_SET(pvo, j); 204090643Sbenno pmap_pte_overflow--; 204190643Sbenno PMAP_PVO_CHECK(pvo); 204290643Sbenno return (1); 204390643Sbenno } 204490643Sbenno 204590643Sbenno source_pvo = pvo; 204690643Sbenno 204790643Sbenno if (victim_pvo != NULL) 204890643Sbenno break; 204990643Sbenno } 205090643Sbenno 205178880Sbenno /* 205290643Sbenno * We also need the pvo entry of the victim we are replacing 205390643Sbenno * so save the R & C bits of the PTE. 205478880Sbenno */ 205590643Sbenno if ((pt->pte_hi & PTE_HID) == 0 && victim_pvo == NULL && 205690643Sbenno pmap_pte_compare(pt, &pvo->pvo_pte)) { 205790643Sbenno victim_pvo = pvo; 205890643Sbenno if (source_pvo != NULL) 205990643Sbenno break; 206090643Sbenno } 206190643Sbenno } 206278880Sbenno 206390643Sbenno if (source_pvo == NULL) 206490643Sbenno return (0); 206590643Sbenno 206690643Sbenno if (victim_pvo == NULL) { 206790643Sbenno if ((pt->pte_hi & PTE_HID) == 0) 206890643Sbenno panic("pmap_pte_spill: victim p-pte (%p) has no pvo" 206990643Sbenno "entry", pt); 207090643Sbenno 207178880Sbenno /* 207290643Sbenno * If this is a secondary PTE, we need to search it's primary 207390643Sbenno * pvo bucket for the matching PVO. 207478880Sbenno */ 207590643Sbenno LIST_FOREACH(pvo, &pmap_pvo_table[ptegidx ^ pmap_pteg_mask], 207690643Sbenno pvo_olink) { 207790643Sbenno PMAP_PVO_CHECK(pvo); 207890643Sbenno /* 207990643Sbenno * We also need the pvo entry of the victim we are 208090643Sbenno * replacing so save the R & C bits of the PTE. 208190643Sbenno */ 208290643Sbenno if (pmap_pte_compare(pt, &pvo->pvo_pte)) { 208390643Sbenno victim_pvo = pvo; 208490643Sbenno break; 208590643Sbenno } 208690643Sbenno } 208778880Sbenno 208890643Sbenno if (victim_pvo == NULL) 208990643Sbenno panic("pmap_pte_spill: victim s-pte (%p) has no pvo" 209090643Sbenno "entry", pt); 209190643Sbenno } 209278880Sbenno 209390643Sbenno /* 209490643Sbenno * We are invalidating the TLB entry for the EA we are replacing even 209590643Sbenno * though it's valid. If we don't, we lose any ref/chg bit changes 209690643Sbenno * contained in the TLB entry. 209790643Sbenno */ 209890643Sbenno source_pvo->pvo_pte.pte_hi &= ~PTE_HID; 209978880Sbenno 210090643Sbenno pmap_pte_unset(pt, &victim_pvo->pvo_pte, victim_pvo->pvo_vaddr); 210190643Sbenno pmap_pte_set(pt, &source_pvo->pvo_pte); 210290643Sbenno 210390643Sbenno PVO_PTEGIDX_CLR(victim_pvo); 210490643Sbenno PVO_PTEGIDX_SET(source_pvo, i); 210590643Sbenno pmap_pte_replacements++; 210690643Sbenno 210790643Sbenno PMAP_PVO_CHECK(victim_pvo); 210890643Sbenno PMAP_PVO_CHECK(source_pvo); 210990643Sbenno 211090643Sbenno return (1); 211190643Sbenno} 211290643Sbenno 211390643Sbennostatic int 211490643Sbennopmap_pte_insert(u_int ptegidx, struct pte *pvo_pt) 211590643Sbenno{ 211690643Sbenno struct pte *pt; 211790643Sbenno int i; 211890643Sbenno 211990643Sbenno /* 212090643Sbenno * First try primary hash. 212190643Sbenno */ 212290643Sbenno for (pt = pmap_pteg_table[ptegidx].pt, i = 0; i < 8; i++, pt++) { 212390643Sbenno if ((pt->pte_hi & PTE_VALID) == 0) { 212490643Sbenno pvo_pt->pte_hi &= ~PTE_HID; 212590643Sbenno pmap_pte_set(pt, pvo_pt); 212690643Sbenno return (i); 212778880Sbenno } 212890643Sbenno } 212978880Sbenno 213090643Sbenno /* 213190643Sbenno * Now try secondary hash. 213290643Sbenno */ 213390643Sbenno ptegidx ^= pmap_pteg_mask; 213490643Sbenno ptegidx++; 213590643Sbenno for (pt = pmap_pteg_table[ptegidx].pt, i = 0; i < 8; i++, pt++) { 213690643Sbenno if ((pt->pte_hi & PTE_VALID) == 0) { 213790643Sbenno pvo_pt->pte_hi |= PTE_HID; 213890643Sbenno pmap_pte_set(pt, pvo_pt); 213990643Sbenno return (i); 214090643Sbenno } 214190643Sbenno } 214278880Sbenno 214390643Sbenno panic("pmap_pte_insert: overflow"); 214490643Sbenno return (-1); 214578880Sbenno} 214684921Sbenno 214790643Sbennostatic boolean_t 214890643Sbennopmap_query_bit(vm_page_t m, int ptebit) 214984921Sbenno{ 215090643Sbenno struct pvo_entry *pvo; 215190643Sbenno struct pte *pt; 215284921Sbenno 215390643Sbenno if (pmap_attr_fetch(m) & ptebit) 215490643Sbenno return (TRUE); 215584921Sbenno 215690643Sbenno LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) { 215790643Sbenno PMAP_PVO_CHECK(pvo); /* sanity check */ 215884921Sbenno 215990643Sbenno /* 216090643Sbenno * See if we saved the bit off. If so, cache it and return 216190643Sbenno * success. 216290643Sbenno */ 216390643Sbenno if (pvo->pvo_pte.pte_lo & ptebit) { 216490643Sbenno pmap_attr_save(m, ptebit); 216590643Sbenno PMAP_PVO_CHECK(pvo); /* sanity check */ 216690643Sbenno return (TRUE); 216790643Sbenno } 216890643Sbenno } 216984921Sbenno 217090643Sbenno /* 217190643Sbenno * No luck, now go through the hard part of looking at the PTEs 217290643Sbenno * themselves. Sync so that any pending REF/CHG bits are flushed to 217390643Sbenno * the PTEs. 217490643Sbenno */ 217590643Sbenno SYNC(); 217690643Sbenno LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) { 217790643Sbenno PMAP_PVO_CHECK(pvo); /* sanity check */ 217890643Sbenno 217990643Sbenno /* 218090643Sbenno * See if this pvo has a valid PTE. if so, fetch the 218190643Sbenno * REF/CHG bits from the valid PTE. If the appropriate 218290643Sbenno * ptebit is set, cache it and return success. 218390643Sbenno */ 218490643Sbenno pt = pmap_pvo_to_pte(pvo, -1); 218590643Sbenno if (pt != NULL) { 218690643Sbenno pmap_pte_synch(pt, &pvo->pvo_pte); 218790643Sbenno if (pvo->pvo_pte.pte_lo & ptebit) { 218890643Sbenno pmap_attr_save(m, ptebit); 218990643Sbenno PMAP_PVO_CHECK(pvo); /* sanity check */ 219090643Sbenno return (TRUE); 219190643Sbenno } 219290643Sbenno } 219384921Sbenno } 219484921Sbenno 219590643Sbenno return (TRUE); 219684921Sbenno} 219790643Sbenno 219890643Sbennostatic boolean_t 219990643Sbennopmap_clear_bit(vm_page_t m, int ptebit) 220090643Sbenno{ 220190643Sbenno struct pvo_entry *pvo; 220290643Sbenno struct pte *pt; 220390643Sbenno int rv; 220490643Sbenno 220590643Sbenno /* 220690643Sbenno * Clear the cached value. 220790643Sbenno */ 220890643Sbenno rv = pmap_attr_fetch(m); 220990643Sbenno pmap_attr_clear(m, ptebit); 221090643Sbenno 221190643Sbenno /* 221290643Sbenno * Sync so that any pending REF/CHG bits are flushed to the PTEs (so 221390643Sbenno * we can reset the right ones). note that since the pvo entries and 221490643Sbenno * list heads are accessed via BAT0 and are never placed in the page 221590643Sbenno * table, we don't have to worry about further accesses setting the 221690643Sbenno * REF/CHG bits. 221790643Sbenno */ 221890643Sbenno SYNC(); 221990643Sbenno 222090643Sbenno /* 222190643Sbenno * For each pvo entry, clear the pvo's ptebit. If this pvo has a 222290643Sbenno * valid pte clear the ptebit from the valid pte. 222390643Sbenno */ 222490643Sbenno LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) { 222590643Sbenno PMAP_PVO_CHECK(pvo); /* sanity check */ 222690643Sbenno pt = pmap_pvo_to_pte(pvo, -1); 222790643Sbenno if (pt != NULL) { 222890643Sbenno pmap_pte_synch(pt, &pvo->pvo_pte); 222990643Sbenno if (pvo->pvo_pte.pte_lo & ptebit) 223090643Sbenno pmap_pte_clear(pt, PVO_VADDR(pvo), ptebit); 223190643Sbenno } 223290643Sbenno rv |= pvo->pvo_pte.pte_lo; 223390643Sbenno pvo->pvo_pte.pte_lo &= ~ptebit; 223490643Sbenno PMAP_PVO_CHECK(pvo); /* sanity check */ 223590643Sbenno } 223690643Sbenno 223790643Sbenno return ((rv & ptebit) != 0); 223890643Sbenno} 2239