mmu_oea.c revision 96250
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 96250 2002-05-09 14:09:19Z 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 14383730Smp#include <machine/bat.h> 14490643Sbenno#include <machine/frame.h> 14590643Sbenno#include <machine/md_var.h> 14690643Sbenno#include <machine/psl.h> 14777957Sbenno#include <machine/pte.h> 14890643Sbenno#include <machine/sr.h> 14977957Sbenno 15090643Sbenno#define PMAP_DEBUG 15177957Sbenno 15290643Sbenno#define TODO panic("%s: not implemented", __func__); 15377957Sbenno 15490643Sbenno#define PMAP_LOCK(pm) 15590643Sbenno#define PMAP_UNLOCK(pm) 15690643Sbenno 15790643Sbenno#define TLBIE(va) __asm __volatile("tlbie %0" :: "r"(va)) 15890643Sbenno#define TLBSYNC() __asm __volatile("tlbsync"); 15990643Sbenno#define SYNC() __asm __volatile("sync"); 16090643Sbenno#define EIEIO() __asm __volatile("eieio"); 16190643Sbenno 16290643Sbenno#define VSID_MAKE(sr, hash) ((sr) | (((hash) & 0xfffff) << 4)) 16390643Sbenno#define VSID_TO_SR(vsid) ((vsid) & 0xf) 16490643Sbenno#define VSID_TO_HASH(vsid) (((vsid) >> 4) & 0xfffff) 16590643Sbenno 16690643Sbenno#define PVO_PTEGIDX_MASK 0x0007 /* which PTEG slot */ 16790643Sbenno#define PVO_PTEGIDX_VALID 0x0008 /* slot is valid */ 16890643Sbenno#define PVO_WIRED 0x0010 /* PVO entry is wired */ 16990643Sbenno#define PVO_MANAGED 0x0020 /* PVO entry is managed */ 17090643Sbenno#define PVO_EXECUTABLE 0x0040 /* PVO entry is executable */ 17194835Sbenno#define PVO_BOOTSTRAP 0x0080 /* PVO entry allocated during 17292521Sbenno bootstrap */ 17390643Sbenno#define PVO_VADDR(pvo) ((pvo)->pvo_vaddr & ~ADDR_POFF) 17490643Sbenno#define PVO_ISEXECUTABLE(pvo) ((pvo)->pvo_vaddr & PVO_EXECUTABLE) 17590643Sbenno#define PVO_PTEGIDX_GET(pvo) ((pvo)->pvo_vaddr & PVO_PTEGIDX_MASK) 17690643Sbenno#define PVO_PTEGIDX_ISSET(pvo) ((pvo)->pvo_vaddr & PVO_PTEGIDX_VALID) 17790643Sbenno#define PVO_PTEGIDX_CLR(pvo) \ 17890643Sbenno ((void)((pvo)->pvo_vaddr &= ~(PVO_PTEGIDX_VALID|PVO_PTEGIDX_MASK))) 17990643Sbenno#define PVO_PTEGIDX_SET(pvo, i) \ 18090643Sbenno ((void)((pvo)->pvo_vaddr |= (i)|PVO_PTEGIDX_VALID)) 18190643Sbenno 18290643Sbenno#define PMAP_PVO_CHECK(pvo) 18390643Sbenno 18490643Sbennostruct mem_region { 18590643Sbenno vm_offset_t mr_start; 18690643Sbenno vm_offset_t mr_size; 18777957Sbenno}; 18877957Sbenno 18990643Sbennostruct ofw_map { 19090643Sbenno vm_offset_t om_va; 19190643Sbenno vm_size_t om_len; 19290643Sbenno vm_offset_t om_pa; 19390643Sbenno u_int om_mode; 19490643Sbenno}; 19577957Sbenno 19690643Sbennoint pmap_bootstrapped = 0; 19777957Sbenno 19890643Sbenno/* 19990643Sbenno * Virtual and physical address of message buffer. 20090643Sbenno */ 20190643Sbennostruct msgbuf *msgbufp; 20290643Sbennovm_offset_t msgbuf_phys; 20377957Sbenno 20490643Sbenno/* 20590643Sbenno * Physical addresses of first and last available physical page. 20690643Sbenno */ 20790643Sbennovm_offset_t avail_start; 20890643Sbennovm_offset_t avail_end; 20977957Sbenno 21090643Sbenno/* 21190643Sbenno * Map of physical memory regions. 21290643Sbenno */ 21390643Sbennovm_offset_t phys_avail[128]; 21490643Sbennou_int phys_avail_count; 21590643Sbennostatic struct mem_region regions[128]; 21690643Sbennostatic struct ofw_map translations[128]; 21790643Sbennostatic int translations_size; 21877957Sbenno 21990643Sbenno/* 22090643Sbenno * First and last available kernel virtual addresses. 22190643Sbenno */ 22290643Sbennovm_offset_t virtual_avail; 22390643Sbennovm_offset_t virtual_end; 22490643Sbennovm_offset_t kernel_vm_end; 22577957Sbenno 22690643Sbenno/* 22790643Sbenno * Kernel pmap. 22890643Sbenno */ 22990643Sbennostruct pmap kernel_pmap_store; 23090643Sbennoextern struct pmap ofw_pmap; 23177957Sbenno 23290643Sbenno/* 23390643Sbenno * PTEG data. 23490643Sbenno */ 23590643Sbennostatic struct pteg *pmap_pteg_table; 23690643Sbennou_int pmap_pteg_count; 23790643Sbennou_int pmap_pteg_mask; 23877957Sbenno 23990643Sbenno/* 24090643Sbenno * PVO data. 24190643Sbenno */ 24290643Sbennostruct pvo_head *pmap_pvo_table; /* pvo entries by pteg index */ 24390643Sbennostruct pvo_head pmap_pvo_kunmanaged = 24490643Sbenno LIST_HEAD_INITIALIZER(pmap_pvo_kunmanaged); /* list of unmanaged pages */ 24590643Sbennostruct pvo_head pmap_pvo_unmanaged = 24690643Sbenno LIST_HEAD_INITIALIZER(pmap_pvo_unmanaged); /* list of unmanaged pages */ 24777957Sbenno 24892847Sjeffuma_zone_t pmap_upvo_zone; /* zone for pvo entries for unmanaged pages */ 24992847Sjeffuma_zone_t pmap_mpvo_zone; /* zone for pvo entries for managed pages */ 25090643Sbennostruct vm_object pmap_upvo_zone_obj; 25190643Sbennostruct vm_object pmap_mpvo_zone_obj; 25292654Sjeffstatic vm_object_t pmap_pvo_obj; 25392654Sjeffstatic u_int pmap_pvo_count; 25477957Sbenno 25590643Sbenno#define PMAP_PVO_SIZE 1024 25692521Sbennostatic struct pvo_entry *pmap_bpvo_pool; 25792521Sbennostatic int pmap_bpvo_pool_index; 25892521Sbennostatic int pmap_bpvo_pool_count; 25977957Sbenno 26090643Sbenno#define VSID_NBPW (sizeof(u_int32_t) * 8) 26190643Sbennostatic u_int pmap_vsid_bitmap[NPMAPS / VSID_NBPW]; 26277957Sbenno 26390643Sbennostatic boolean_t pmap_initialized = FALSE; 26477957Sbenno 26590643Sbenno/* 26690643Sbenno * Statistics. 26790643Sbenno */ 26890643Sbennou_int pmap_pte_valid = 0; 26990643Sbennou_int pmap_pte_overflow = 0; 27090643Sbennou_int pmap_pte_replacements = 0; 27190643Sbennou_int pmap_pvo_entries = 0; 27290643Sbennou_int pmap_pvo_enter_calls = 0; 27390643Sbennou_int pmap_pvo_remove_calls = 0; 27490643Sbennou_int pmap_pte_spills = 0; 27590643SbennoSYSCTL_INT(_machdep, OID_AUTO, pmap_pte_valid, CTLFLAG_RD, &pmap_pte_valid, 27690643Sbenno 0, ""); 27790643SbennoSYSCTL_INT(_machdep, OID_AUTO, pmap_pte_overflow, CTLFLAG_RD, 27890643Sbenno &pmap_pte_overflow, 0, ""); 27990643SbennoSYSCTL_INT(_machdep, OID_AUTO, pmap_pte_replacements, CTLFLAG_RD, 28090643Sbenno &pmap_pte_replacements, 0, ""); 28190643SbennoSYSCTL_INT(_machdep, OID_AUTO, pmap_pvo_entries, CTLFLAG_RD, &pmap_pvo_entries, 28290643Sbenno 0, ""); 28390643SbennoSYSCTL_INT(_machdep, OID_AUTO, pmap_pvo_enter_calls, CTLFLAG_RD, 28490643Sbenno &pmap_pvo_enter_calls, 0, ""); 28590643SbennoSYSCTL_INT(_machdep, OID_AUTO, pmap_pvo_remove_calls, CTLFLAG_RD, 28690643Sbenno &pmap_pvo_remove_calls, 0, ""); 28790643SbennoSYSCTL_INT(_machdep, OID_AUTO, pmap_pte_spills, CTLFLAG_RD, 28890643Sbenno &pmap_pte_spills, 0, ""); 28977957Sbenno 29090643Sbennostruct pvo_entry *pmap_pvo_zeropage; 29177957Sbenno 29290643Sbennovm_offset_t pmap_rkva_start = VM_MIN_KERNEL_ADDRESS; 29390643Sbennou_int pmap_rkva_count = 4; 29477957Sbenno 29590643Sbenno/* 29690643Sbenno * Allocate physical memory for use in pmap_bootstrap. 29790643Sbenno */ 29890643Sbennostatic vm_offset_t pmap_bootstrap_alloc(vm_size_t, u_int); 29977957Sbenno 30090643Sbenno/* 30190643Sbenno * PTE calls. 30290643Sbenno */ 30390643Sbennostatic int pmap_pte_insert(u_int, struct pte *); 30477957Sbenno 30577957Sbenno/* 30690643Sbenno * PVO calls. 30777957Sbenno */ 30892847Sjeffstatic int pmap_pvo_enter(pmap_t, uma_zone_t, struct pvo_head *, 30990643Sbenno vm_offset_t, vm_offset_t, u_int, int); 31090643Sbennostatic void pmap_pvo_remove(struct pvo_entry *, int); 31190643Sbennostatic struct pvo_entry *pmap_pvo_find_va(pmap_t, vm_offset_t, int *); 31290643Sbennostatic struct pte *pmap_pvo_to_pte(const struct pvo_entry *, int); 31390643Sbenno 31490643Sbenno/* 31590643Sbenno * Utility routines. 31690643Sbenno */ 31792654Sjeffstatic void * pmap_pvo_allocf(uma_zone_t, int, u_int8_t *, int); 31890643Sbennostatic struct pvo_entry *pmap_rkva_alloc(void); 31990643Sbennostatic void pmap_pa_map(struct pvo_entry *, vm_offset_t, 32090643Sbenno struct pte *, int *); 32190643Sbennostatic void pmap_pa_unmap(struct pvo_entry *, struct pte *, int *); 32290643Sbennostatic void pmap_syncicache(vm_offset_t, vm_size_t); 32390643Sbennostatic boolean_t pmap_query_bit(vm_page_t, int); 32490643Sbennostatic boolean_t pmap_clear_bit(vm_page_t, int); 32590643Sbennostatic void tlbia(void); 32690643Sbenno 32790643Sbennostatic __inline int 32890643Sbennova_to_sr(u_int *sr, vm_offset_t va) 32977957Sbenno{ 33090643Sbenno return (sr[(uintptr_t)va >> ADDR_SR_SHFT]); 33190643Sbenno} 33277957Sbenno 33390643Sbennostatic __inline u_int 33490643Sbennova_to_pteg(u_int sr, vm_offset_t addr) 33590643Sbenno{ 33690643Sbenno u_int hash; 33790643Sbenno 33890643Sbenno hash = (sr & SR_VSID_MASK) ^ (((u_int)addr & ADDR_PIDX) >> 33990643Sbenno ADDR_PIDX_SHFT); 34090643Sbenno return (hash & pmap_pteg_mask); 34177957Sbenno} 34277957Sbenno 34390643Sbennostatic __inline struct pvo_head * 34496250Sbennopa_to_pvoh(vm_offset_t pa, vm_page_t *pg_p) 34577957Sbenno{ 34690643Sbenno struct vm_page *pg; 34777957Sbenno 34890643Sbenno pg = PHYS_TO_VM_PAGE(pa); 34990643Sbenno 35096250Sbenno if (pg_p != NULL) 35196250Sbenno *pg_p = pg; 35296250Sbenno 35390643Sbenno if (pg == NULL) 35490643Sbenno return (&pmap_pvo_unmanaged); 35590643Sbenno 35690643Sbenno return (&pg->md.mdpg_pvoh); 35777957Sbenno} 35877957Sbenno 35990643Sbennostatic __inline struct pvo_head * 36090643Sbennovm_page_to_pvoh(vm_page_t m) 36190643Sbenno{ 36290643Sbenno 36390643Sbenno return (&m->md.mdpg_pvoh); 36490643Sbenno} 36590643Sbenno 36677957Sbennostatic __inline void 36790643Sbennopmap_attr_clear(vm_page_t m, int ptebit) 36877957Sbenno{ 36990643Sbenno 37090643Sbenno m->md.mdpg_attrs &= ~ptebit; 37177957Sbenno} 37277957Sbenno 37377957Sbennostatic __inline int 37490643Sbennopmap_attr_fetch(vm_page_t m) 37577957Sbenno{ 37677957Sbenno 37790643Sbenno return (m->md.mdpg_attrs); 37877957Sbenno} 37977957Sbenno 38090643Sbennostatic __inline void 38190643Sbennopmap_attr_save(vm_page_t m, int ptebit) 38290643Sbenno{ 38390643Sbenno 38490643Sbenno m->md.mdpg_attrs |= ptebit; 38590643Sbenno} 38690643Sbenno 38777957Sbennostatic __inline int 38890643Sbennopmap_pte_compare(const struct pte *pt, const struct pte *pvo_pt) 38977957Sbenno{ 39090643Sbenno if (pt->pte_hi == pvo_pt->pte_hi) 39190643Sbenno return (1); 39290643Sbenno 39390643Sbenno return (0); 39477957Sbenno} 39577957Sbenno 39677957Sbennostatic __inline int 39790643Sbennopmap_pte_match(struct pte *pt, u_int sr, vm_offset_t va, int which) 39877957Sbenno{ 39990643Sbenno return (pt->pte_hi & ~PTE_VALID) == 40090643Sbenno (((sr & SR_VSID_MASK) << PTE_VSID_SHFT) | 40190643Sbenno ((va >> ADDR_API_SHFT) & PTE_API) | which); 40290643Sbenno} 40377957Sbenno 40490643Sbennostatic __inline void 40590643Sbennopmap_pte_create(struct pte *pt, u_int sr, vm_offset_t va, u_int pte_lo) 40690643Sbenno{ 40790643Sbenno /* 40890643Sbenno * Construct a PTE. Default to IMB initially. Valid bit only gets 40990643Sbenno * set when the real pte is set in memory. 41090643Sbenno * 41190643Sbenno * Note: Don't set the valid bit for correct operation of tlb update. 41290643Sbenno */ 41390643Sbenno pt->pte_hi = ((sr & SR_VSID_MASK) << PTE_VSID_SHFT) | 41490643Sbenno (((va & ADDR_PIDX) >> ADDR_API_SHFT) & PTE_API); 41590643Sbenno pt->pte_lo = pte_lo; 41677957Sbenno} 41777957Sbenno 41890643Sbennostatic __inline void 41990643Sbennopmap_pte_synch(struct pte *pt, struct pte *pvo_pt) 42077957Sbenno{ 42177957Sbenno 42290643Sbenno pvo_pt->pte_lo |= pt->pte_lo & (PTE_REF | PTE_CHG); 42377957Sbenno} 42477957Sbenno 42590643Sbennostatic __inline void 42690643Sbennopmap_pte_clear(struct pte *pt, vm_offset_t va, int ptebit) 42777957Sbenno{ 42877957Sbenno 42990643Sbenno /* 43090643Sbenno * As shown in Section 7.6.3.2.3 43190643Sbenno */ 43290643Sbenno pt->pte_lo &= ~ptebit; 43390643Sbenno TLBIE(va); 43490643Sbenno EIEIO(); 43590643Sbenno TLBSYNC(); 43690643Sbenno SYNC(); 43777957Sbenno} 43877957Sbenno 43990643Sbennostatic __inline void 44090643Sbennopmap_pte_set(struct pte *pt, struct pte *pvo_pt) 44177957Sbenno{ 44277957Sbenno 44390643Sbenno pvo_pt->pte_hi |= PTE_VALID; 44490643Sbenno 44577957Sbenno /* 44690643Sbenno * Update the PTE as defined in section 7.6.3.1. 44790643Sbenno * Note that the REF/CHG bits are from pvo_pt and thus should havce 44890643Sbenno * been saved so this routine can restore them (if desired). 44977957Sbenno */ 45090643Sbenno pt->pte_lo = pvo_pt->pte_lo; 45190643Sbenno EIEIO(); 45290643Sbenno pt->pte_hi = pvo_pt->pte_hi; 45390643Sbenno SYNC(); 45490643Sbenno pmap_pte_valid++; 45590643Sbenno} 45677957Sbenno 45790643Sbennostatic __inline void 45890643Sbennopmap_pte_unset(struct pte *pt, struct pte *pvo_pt, vm_offset_t va) 45990643Sbenno{ 46090643Sbenno 46190643Sbenno pvo_pt->pte_hi &= ~PTE_VALID; 46290643Sbenno 46377957Sbenno /* 46490643Sbenno * Force the reg & chg bits back into the PTEs. 46577957Sbenno */ 46690643Sbenno SYNC(); 46777957Sbenno 46890643Sbenno /* 46990643Sbenno * Invalidate the pte. 47090643Sbenno */ 47190643Sbenno pt->pte_hi &= ~PTE_VALID; 47277957Sbenno 47390643Sbenno SYNC(); 47490643Sbenno TLBIE(va); 47590643Sbenno EIEIO(); 47690643Sbenno TLBSYNC(); 47790643Sbenno SYNC(); 47877957Sbenno 47990643Sbenno /* 48090643Sbenno * Save the reg & chg bits. 48190643Sbenno */ 48290643Sbenno pmap_pte_synch(pt, pvo_pt); 48390643Sbenno pmap_pte_valid--; 48477957Sbenno} 48577957Sbenno 48690643Sbennostatic __inline void 48790643Sbennopmap_pte_change(struct pte *pt, struct pte *pvo_pt, vm_offset_t va) 48890643Sbenno{ 48990643Sbenno 49090643Sbenno /* 49190643Sbenno * Invalidate the PTE 49290643Sbenno */ 49390643Sbenno pmap_pte_unset(pt, pvo_pt, va); 49490643Sbenno pmap_pte_set(pt, pvo_pt); 49590643Sbenno} 49690643Sbenno 49777957Sbenno/* 49890643Sbenno * Quick sort callout for comparing memory regions. 49977957Sbenno */ 50090643Sbennostatic int mr_cmp(const void *a, const void *b); 50190643Sbennostatic int om_cmp(const void *a, const void *b); 50290643Sbenno 50390643Sbennostatic int 50490643Sbennomr_cmp(const void *a, const void *b) 50577957Sbenno{ 50690643Sbenno const struct mem_region *regiona; 50790643Sbenno const struct mem_region *regionb; 50877957Sbenno 50990643Sbenno regiona = a; 51090643Sbenno regionb = b; 51190643Sbenno if (regiona->mr_start < regionb->mr_start) 51290643Sbenno return (-1); 51390643Sbenno else if (regiona->mr_start > regionb->mr_start) 51490643Sbenno return (1); 51590643Sbenno else 51690643Sbenno return (0); 51790643Sbenno} 51877957Sbenno 51990643Sbennostatic int 52090643Sbennoom_cmp(const void *a, const void *b) 52190643Sbenno{ 52290643Sbenno const struct ofw_map *mapa; 52390643Sbenno const struct ofw_map *mapb; 52490643Sbenno 52590643Sbenno mapa = a; 52690643Sbenno mapb = b; 52790643Sbenno if (mapa->om_pa < mapb->om_pa) 52890643Sbenno return (-1); 52990643Sbenno else if (mapa->om_pa > mapb->om_pa) 53090643Sbenno return (1); 53190643Sbenno else 53290643Sbenno return (0); 53377957Sbenno} 53477957Sbenno 53577957Sbennovoid 53690643Sbennopmap_bootstrap(vm_offset_t kernelstart, vm_offset_t kernelend) 53777957Sbenno{ 53890643Sbenno ihandle_t pmem, mmui; 53990643Sbenno phandle_t chosen, mmu; 54090643Sbenno int sz; 54190643Sbenno int i, j; 54291793Sbenno vm_size_t size, physsz; 54390643Sbenno vm_offset_t pa, va, off; 54490643Sbenno u_int batl, batu; 54577957Sbenno 54677957Sbenno /* 54790643Sbenno * Use an IBAT and a DBAT to map the bottom segment of memory 54890643Sbenno * where we are. 54977957Sbenno */ 55090643Sbenno batu = BATU(0x00000000, BAT_BL_256M, BAT_Vs); 55190643Sbenno batl = BATL(0x00000000, BAT_M, BAT_PP_RW); 55290643Sbenno __asm ("mtibatu 0,%0; mtibatl 0,%1; mtdbatu 0,%0; mtdbatl 0,%1" 55390643Sbenno :: "r"(batu), "r"(batl)); 55490643Sbenno#if 0 55590643Sbenno batu = BATU(0x80000000, BAT_BL_256M, BAT_Vs); 55690643Sbenno batl = BATL(0x80000000, BAT_M, BAT_PP_RW); 55790643Sbenno __asm ("mtibatu 1,%0; mtibatl 1,%1; mtdbatu 1,%0; mtdbatl 1,%1" 55890643Sbenno :: "r"(batu), "r"(batl)); 55990643Sbenno#endif 56077957Sbenno 56177957Sbenno /* 56290643Sbenno * Set the start and end of kva. 56377957Sbenno */ 56490643Sbenno virtual_avail = VM_MIN_KERNEL_ADDRESS; 56590643Sbenno virtual_end = VM_MAX_KERNEL_ADDRESS; 56690643Sbenno 56790643Sbenno if ((pmem = OF_finddevice("/memory")) == -1) 56890643Sbenno panic("pmap_bootstrap: can't locate memory device"); 56990643Sbenno if ((sz = OF_getproplen(pmem, "available")) == -1) 57090643Sbenno panic("pmap_bootstrap: can't get length of available memory"); 57190643Sbenno if (sizeof(phys_avail) < sz) 57290643Sbenno panic("pmap_bootstrap: phys_avail too small"); 57390643Sbenno if (sizeof(regions) < sz) 57490643Sbenno panic("pmap_bootstrap: regions too small"); 57590643Sbenno bzero(regions, sz); 57690643Sbenno if (OF_getprop(pmem, "available", regions, sz) == -1) 57790643Sbenno panic("pmap_bootstrap: can't get available memory"); 57890643Sbenno sz /= sizeof(*regions); 57990643Sbenno CTR0(KTR_PMAP, "pmap_bootstrap: physical memory"); 58090643Sbenno qsort(regions, sz, sizeof(*regions), mr_cmp); 58190643Sbenno phys_avail_count = 0; 58291793Sbenno physsz = 0; 58390643Sbenno for (i = 0, j = 0; i < sz; i++, j += 2) { 58490643Sbenno CTR3(KTR_PMAP, "region: %#x - %#x (%#x)", regions[i].mr_start, 58590643Sbenno regions[i].mr_start + regions[i].mr_size, 58690643Sbenno regions[i].mr_size); 58790643Sbenno phys_avail[j] = regions[i].mr_start; 58890643Sbenno phys_avail[j + 1] = regions[i].mr_start + regions[i].mr_size; 58990643Sbenno phys_avail_count++; 59091793Sbenno physsz += regions[i].mr_size; 59177957Sbenno } 59291793Sbenno physmem = btoc(physsz); 59377957Sbenno 59477957Sbenno /* 59590643Sbenno * Allocate PTEG table. 59677957Sbenno */ 59790643Sbenno#ifdef PTEGCOUNT 59890643Sbenno pmap_pteg_count = PTEGCOUNT; 59990643Sbenno#else 60090643Sbenno pmap_pteg_count = 0x1000; 60177957Sbenno 60290643Sbenno while (pmap_pteg_count < physmem) 60390643Sbenno pmap_pteg_count <<= 1; 60477957Sbenno 60590643Sbenno pmap_pteg_count >>= 1; 60690643Sbenno#endif /* PTEGCOUNT */ 60777957Sbenno 60890643Sbenno size = pmap_pteg_count * sizeof(struct pteg); 60990643Sbenno CTR2(KTR_PMAP, "pmap_bootstrap: %d PTEGs, %d bytes", pmap_pteg_count, 61090643Sbenno size); 61190643Sbenno pmap_pteg_table = (struct pteg *)pmap_bootstrap_alloc(size, size); 61290643Sbenno CTR1(KTR_PMAP, "pmap_bootstrap: PTEG table at %p", pmap_pteg_table); 61390643Sbenno bzero((void *)pmap_pteg_table, pmap_pteg_count * sizeof(struct pteg)); 61490643Sbenno pmap_pteg_mask = pmap_pteg_count - 1; 61577957Sbenno 61690643Sbenno /* 61794839Sbenno * Allocate pv/overflow lists. 61890643Sbenno */ 61990643Sbenno size = sizeof(struct pvo_head) * pmap_pteg_count; 62090643Sbenno pmap_pvo_table = (struct pvo_head *)pmap_bootstrap_alloc(size, 62190643Sbenno PAGE_SIZE); 62290643Sbenno CTR1(KTR_PMAP, "pmap_bootstrap: PVO table at %p", pmap_pvo_table); 62390643Sbenno for (i = 0; i < pmap_pteg_count; i++) 62490643Sbenno LIST_INIT(&pmap_pvo_table[i]); 62577957Sbenno 62690643Sbenno /* 62790643Sbenno * Allocate the message buffer. 62890643Sbenno */ 62990643Sbenno msgbuf_phys = pmap_bootstrap_alloc(MSGBUF_SIZE, 0); 63077957Sbenno 63190643Sbenno /* 63290643Sbenno * Initialise the unmanaged pvo pool. 63390643Sbenno */ 63492521Sbenno pmap_bpvo_pool = (struct pvo_entry *)pmap_bootstrap_alloc(PAGE_SIZE, 0); 63592521Sbenno pmap_bpvo_pool_index = 0; 63692521Sbenno pmap_bpvo_pool_count = (int)PAGE_SIZE / sizeof(struct pvo_entry); 63777957Sbenno 63877957Sbenno /* 63990643Sbenno * Make sure kernel vsid is allocated as well as VSID 0. 64077957Sbenno */ 64190643Sbenno pmap_vsid_bitmap[(KERNEL_VSIDBITS & (NPMAPS - 1)) / VSID_NBPW] 64290643Sbenno |= 1 << (KERNEL_VSIDBITS % VSID_NBPW); 64390643Sbenno pmap_vsid_bitmap[0] |= 1; 64477957Sbenno 64590643Sbenno /* 64690643Sbenno * Set up the OpenFirmware pmap and add it's mappings. 64790643Sbenno */ 64890643Sbenno pmap_pinit(&ofw_pmap); 64990643Sbenno ofw_pmap.pm_sr[KERNEL_SR] = KERNEL_SEGMENT; 65090643Sbenno if ((chosen = OF_finddevice("/chosen")) == -1) 65190643Sbenno panic("pmap_bootstrap: can't find /chosen"); 65290643Sbenno OF_getprop(chosen, "mmu", &mmui, 4); 65390643Sbenno if ((mmu = OF_instance_to_package(mmui)) == -1) 65490643Sbenno panic("pmap_bootstrap: can't get mmu package"); 65590643Sbenno if ((sz = OF_getproplen(mmu, "translations")) == -1) 65690643Sbenno panic("pmap_bootstrap: can't get ofw translation count"); 65790643Sbenno if (sizeof(translations) < sz) 65890643Sbenno panic("pmap_bootstrap: translations too small"); 65990643Sbenno bzero(translations, sz); 66090643Sbenno if (OF_getprop(mmu, "translations", translations, sz) == -1) 66190643Sbenno panic("pmap_bootstrap: can't get ofw translations"); 66290643Sbenno CTR0(KTR_PMAP, "pmap_bootstrap: translations"); 66390643Sbenno qsort(translations, sz, sizeof (*translations), om_cmp); 66490643Sbenno for (i = 0; i < sz; i++) { 66590643Sbenno CTR3(KTR_PMAP, "translation: pa=%#x va=%#x len=%#x", 66690643Sbenno translations[i].om_pa, translations[i].om_va, 66790643Sbenno translations[i].om_len); 66877957Sbenno 66990643Sbenno /* Drop stuff below something? */ 67077957Sbenno 67190643Sbenno /* Enter the pages? */ 67290643Sbenno for (off = 0; off < translations[i].om_len; off += PAGE_SIZE) { 67390643Sbenno struct vm_page m; 67477957Sbenno 67590643Sbenno m.phys_addr = translations[i].om_pa + off; 67690643Sbenno pmap_enter(&ofw_pmap, translations[i].om_va + off, &m, 67790643Sbenno VM_PROT_ALL, 1); 67877957Sbenno } 67977957Sbenno } 68090643Sbenno#ifdef SMP 68190643Sbenno TLBSYNC(); 68290643Sbenno#endif 68377957Sbenno 68490643Sbenno /* 68590643Sbenno * Initialize the kernel pmap (which is statically allocated). 68690643Sbenno */ 68790643Sbenno for (i = 0; i < 16; i++) { 68890643Sbenno kernel_pmap->pm_sr[i] = EMPTY_SEGMENT; 68977957Sbenno } 69090643Sbenno kernel_pmap->pm_sr[KERNEL_SR] = KERNEL_SEGMENT; 69190643Sbenno kernel_pmap->pm_active = ~0; 69277957Sbenno 69377957Sbenno /* 69490643Sbenno * Allocate a kernel stack with a guard page for thread0 and map it 69590643Sbenno * into the kernel page map. 69677957Sbenno */ 69790643Sbenno pa = pmap_bootstrap_alloc(KSTACK_PAGES * PAGE_SIZE, 0); 69890643Sbenno kstack0_phys = pa; 69990643Sbenno kstack0 = virtual_avail + (KSTACK_GUARD_PAGES * PAGE_SIZE); 70090643Sbenno CTR2(KTR_PMAP, "pmap_bootstrap: kstack0 at %#x (%#x)", kstack0_phys, 70190643Sbenno kstack0); 70290643Sbenno virtual_avail += (KSTACK_PAGES + KSTACK_GUARD_PAGES) * PAGE_SIZE; 70390643Sbenno for (i = 0; i < KSTACK_PAGES; i++) { 70490643Sbenno pa = kstack0_phys + i * PAGE_SIZE; 70590643Sbenno va = kstack0 + i * PAGE_SIZE; 70690643Sbenno pmap_kenter(va, pa); 70790643Sbenno TLBIE(va); 70877957Sbenno } 70977957Sbenno 71090643Sbenno /* 71190643Sbenno * Calculate the first and last available physical addresses. 71290643Sbenno */ 71390643Sbenno avail_start = phys_avail[0]; 71490643Sbenno for (i = 0; phys_avail[i + 2] != 0; i += 2) 71590643Sbenno ; 71690643Sbenno avail_end = phys_avail[i + 1]; 71790643Sbenno Maxmem = powerpc_btop(avail_end); 71877957Sbenno 71977957Sbenno /* 72090643Sbenno * Allocate virtual address space for the message buffer. 72177957Sbenno */ 72290643Sbenno msgbufp = (struct msgbuf *)virtual_avail; 72390643Sbenno virtual_avail += round_page(MSGBUF_SIZE); 72477957Sbenno 72577957Sbenno /* 72690643Sbenno * Initialize hardware. 72777957Sbenno */ 72877957Sbenno for (i = 0; i < 16; i++) { 72994836Sbenno mtsrin(i << ADDR_SR_SHFT, EMPTY_SEGMENT); 73077957Sbenno } 73177957Sbenno __asm __volatile ("mtsr %0,%1" 73290643Sbenno :: "n"(KERNEL_SR), "r"(KERNEL_SEGMENT)); 73377957Sbenno __asm __volatile ("sync; mtsdr1 %0; isync" 73490643Sbenno :: "r"((u_int)pmap_pteg_table | (pmap_pteg_mask >> 10))); 73577957Sbenno tlbia(); 73677957Sbenno 73790643Sbenno pmap_bootstrapped++; 73877957Sbenno} 73977957Sbenno 74077957Sbenno/* 74190643Sbenno * Activate a user pmap. The pmap must be activated before it's address 74290643Sbenno * space can be accessed in any way. 74377957Sbenno */ 74477957Sbennovoid 74590643Sbennopmap_activate(struct thread *td) 74677957Sbenno{ 74796250Sbenno pmap_t pm, pmr; 74877957Sbenno 74977957Sbenno /* 75090643Sbenno * Load all the data we need up front to encourasge the compiler to 75190643Sbenno * not issue any loads while we have interrupts disabled below. 75277957Sbenno */ 75390643Sbenno pm = &td->td_proc->p_vmspace->vm_pmap; 75477957Sbenno 75590643Sbenno KASSERT(pm->pm_active == 0, ("pmap_activate: pmap already active?")); 75677957Sbenno 75796250Sbenno if ((pmr = (pmap_t)pmap_kextract((vm_offset_t)pm)) == NULL) 75896250Sbenno pmr = pm; 75996250Sbenno 76090643Sbenno pm->pm_active |= PCPU_GET(cpumask); 76196250Sbenno PCPU_SET(curpmap, pmr); 76277957Sbenno} 76377957Sbenno 76491483Sbennovoid 76591483Sbennopmap_deactivate(struct thread *td) 76691483Sbenno{ 76791483Sbenno pmap_t pm; 76891483Sbenno 76991483Sbenno pm = &td->td_proc->p_vmspace->vm_pmap; 77091483Sbenno pm->pm_active &= ~(PCPU_GET(cpumask)); 77196250Sbenno PCPU_SET(curpmap, NULL); 77291483Sbenno} 77391483Sbenno 77490643Sbennovm_offset_t 77590643Sbennopmap_addr_hint(vm_object_t object, vm_offset_t va, vm_size_t size) 77677957Sbenno{ 77790643Sbenno TODO; 77890643Sbenno return (0); 77977957Sbenno} 78077957Sbenno 78177957Sbennovoid 78290643Sbennopmap_change_wiring(pmap_t pmap, vm_offset_t va, boolean_t wired) 78377957Sbenno{ 78490643Sbenno TODO; 78577957Sbenno} 78677957Sbenno 78777957Sbennovoid 78890643Sbennopmap_clear_modify(vm_page_t m) 78977957Sbenno{ 79077957Sbenno 79190643Sbenno if (m->flags * PG_FICTITIOUS) 79290643Sbenno return; 79390643Sbenno pmap_clear_bit(m, PTE_CHG); 79477957Sbenno} 79577957Sbenno 79677957Sbennovoid 79790643Sbennopmap_collect(void) 79877957Sbenno{ 79990643Sbenno TODO; 80077957Sbenno} 80177957Sbenno 80277957Sbennovoid 80390643Sbennopmap_copy(pmap_t dst_pmap, pmap_t src_pmap, vm_offset_t dst_addr, 80490643Sbenno vm_size_t len, vm_offset_t src_addr) 80577957Sbenno{ 80690643Sbenno TODO; 80777957Sbenno} 80877957Sbenno 80977957Sbennovoid 81094777Speterpmap_copy_page(vm_page_t src, vm_page_t dst) 81177957Sbenno{ 81290643Sbenno TODO; 81377957Sbenno} 81477957Sbenno 81577957Sbenno/* 81690643Sbenno * Zero a page of physical memory by temporarily mapping it into the tlb. 81777957Sbenno */ 81877957Sbennovoid 81994777Speterpmap_zero_page(vm_page_t m) 82077957Sbenno{ 82194777Speter vm_offset_t pa = VM_PAGE_TO_PHYS(m); 82290643Sbenno caddr_t va; 82377957Sbenno int i; 82477957Sbenno 82590643Sbenno if (pa < SEGMENT_LENGTH) { 82690643Sbenno va = (caddr_t) pa; 82790643Sbenno } else if (pmap_initialized) { 82890643Sbenno if (pmap_pvo_zeropage == NULL) 82990643Sbenno pmap_pvo_zeropage = pmap_rkva_alloc(); 83090643Sbenno pmap_pa_map(pmap_pvo_zeropage, pa, NULL, NULL); 83190643Sbenno va = (caddr_t)PVO_VADDR(pmap_pvo_zeropage); 83290643Sbenno } else { 83390643Sbenno panic("pmap_zero_page: can't zero pa %#x", pa); 83477957Sbenno } 83590643Sbenno 83690643Sbenno bzero(va, PAGE_SIZE); 83790643Sbenno 83890643Sbenno for (i = PAGE_SIZE / CACHELINESIZE; i > 0; i--) { 83990643Sbenno __asm __volatile("dcbz 0,%0" :: "r"(va)); 84090643Sbenno va += CACHELINESIZE; 84190643Sbenno } 84290643Sbenno 84390643Sbenno if (pa >= SEGMENT_LENGTH) 84490643Sbenno pmap_pa_unmap(pmap_pvo_zeropage, NULL, NULL); 84577957Sbenno} 84677957Sbenno 84777957Sbennovoid 84894777Speterpmap_zero_page_area(vm_page_t m, int off, int size) 84977957Sbenno{ 85090643Sbenno TODO; 85177957Sbenno} 85277957Sbenno 85377957Sbenno/* 85490643Sbenno * Map the given physical page at the specified virtual address in the 85590643Sbenno * target pmap with the protection requested. If specified the page 85690643Sbenno * will be wired down. 85777957Sbenno */ 85877957Sbennovoid 85990643Sbennopmap_enter(pmap_t pmap, vm_offset_t va, vm_page_t m, vm_prot_t prot, 86090643Sbenno boolean_t wired) 86177957Sbenno{ 86290643Sbenno struct pvo_head *pvo_head; 86392847Sjeff uma_zone_t zone; 86496250Sbenno vm_page_t pg; 86596250Sbenno u_int pte_lo, pvo_flags, was_exec, i; 86690643Sbenno int error; 86777957Sbenno 86890643Sbenno if (!pmap_initialized) { 86990643Sbenno pvo_head = &pmap_pvo_kunmanaged; 87090643Sbenno zone = pmap_upvo_zone; 87190643Sbenno pvo_flags = 0; 87296250Sbenno pg = NULL; 87396250Sbenno was_exec = PTE_EXEC; 87490643Sbenno } else { 87596250Sbenno pvo_head = pa_to_pvoh(VM_PAGE_TO_PHYS(m), &pg); 87690643Sbenno zone = pmap_mpvo_zone; 87790643Sbenno pvo_flags = PVO_MANAGED; 87896250Sbenno was_exec = 0; 87990643Sbenno } 88077957Sbenno 88196250Sbenno /* 88296250Sbenno * If this is a managed page, and it's the first reference to the page, 88396250Sbenno * clear the execness of the page. Otherwise fetch the execness. 88496250Sbenno */ 88596250Sbenno if (pg != NULL) { 88696250Sbenno if (LIST_EMPTY(pvo_head)) { 88796250Sbenno pmap_attr_clear(pg, PTE_EXEC); 88896250Sbenno } else { 88996250Sbenno was_exec = pmap_attr_fetch(pg) & PTE_EXEC; 89096250Sbenno } 89196250Sbenno } 89296250Sbenno 89396250Sbenno 89496250Sbenno /* 89596250Sbenno * Assume the page is cache inhibited and access is guarded unless 89696250Sbenno * it's in our available memory array. 89796250Sbenno */ 89890643Sbenno pte_lo = PTE_I | PTE_G; 89996250Sbenno for (i = 0; i < (phys_avail_count * 2); i += 2) { 90096250Sbenno if (VM_PAGE_TO_PHYS(m) >= phys_avail[i] && 90196250Sbenno VM_PAGE_TO_PHYS(m) <= phys_avail[i + 1]) { 90296250Sbenno pte_lo &= ~(PTE_I | PTE_G); 90396250Sbenno break; 90496250Sbenno } 90596250Sbenno } 90677957Sbenno 90790643Sbenno if (prot & VM_PROT_WRITE) 90890643Sbenno pte_lo |= PTE_BW; 90990643Sbenno else 91090643Sbenno pte_lo |= PTE_BR; 91177957Sbenno 91296250Sbenno pvo_flags |= (prot & VM_PROT_EXECUTE); 91377957Sbenno 91490643Sbenno if (wired) 91590643Sbenno pvo_flags |= PVO_WIRED; 91677957Sbenno 91796250Sbenno error = pmap_pvo_enter(pmap, zone, pvo_head, va, VM_PAGE_TO_PHYS(m), 91896250Sbenno pte_lo, pvo_flags); 91990643Sbenno 92096250Sbenno /* 92196250Sbenno * Flush the real page from the instruction cache if this page is 92296250Sbenno * mapped executable and cacheable and was not previously mapped (or 92396250Sbenno * was not mapped executable). 92496250Sbenno */ 92596250Sbenno if (error == 0 && (pvo_flags & PVO_EXECUTABLE) && 92696250Sbenno (pte_lo & PTE_I) == 0 && was_exec == 0) { 92777957Sbenno /* 92890643Sbenno * Flush the real memory from the cache. 92977957Sbenno */ 93096250Sbenno pmap_syncicache(VM_PAGE_TO_PHYS(m), PAGE_SIZE); 93196250Sbenno if (pg != NULL) 93296250Sbenno pmap_attr_save(pg, PTE_EXEC); 93377957Sbenno } 93477957Sbenno} 93577957Sbenno 93690643Sbennovm_offset_t 93790643Sbennopmap_extract(pmap_t pmap, vm_offset_t va) 93877957Sbenno{ 93990643Sbenno TODO; 94090643Sbenno return (0); 94177957Sbenno} 94277957Sbenno 94377957Sbenno/* 94490643Sbenno * Grow the number of kernel page table entries. Unneeded. 94577957Sbenno */ 94690643Sbennovoid 94790643Sbennopmap_growkernel(vm_offset_t addr) 94877957Sbenno{ 94990643Sbenno} 95077957Sbenno 95190643Sbennovoid 95290643Sbennopmap_init(vm_offset_t phys_start, vm_offset_t phys_end) 95390643Sbenno{ 95477957Sbenno 95594753Sbenno CTR0(KTR_PMAP, "pmap_init"); 95677957Sbenno} 95777957Sbenno 95890643Sbennovoid 95990643Sbennopmap_init2(void) 96077957Sbenno{ 96177957Sbenno 96294753Sbenno CTR0(KTR_PMAP, "pmap_init2"); 96392521Sbenno 96492654Sjeff pmap_pvo_obj = vm_object_allocate(OBJT_PHYS, 16); 96592654Sjeff pmap_pvo_count = 0; 96692847Sjeff pmap_upvo_zone = uma_zcreate("UPVO entry", sizeof (struct pvo_entry), 96792847Sjeff NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0); 96892654Sjeff uma_zone_set_allocf(pmap_upvo_zone, pmap_pvo_allocf); 96992847Sjeff pmap_mpvo_zone = uma_zcreate("MPVO entry", sizeof(struct pvo_entry), 97092847Sjeff NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0); 97192654Sjeff uma_zone_set_allocf(pmap_mpvo_zone, pmap_pvo_allocf); 97290643Sbenno pmap_initialized = TRUE; 97377957Sbenno} 97477957Sbenno 97590643Sbennoboolean_t 97690643Sbennopmap_is_modified(vm_page_t m) 97790643Sbenno{ 97890643Sbenno TODO; 97990643Sbenno return (0); 98090643Sbenno} 98190643Sbenno 98290643Sbennovoid 98390643Sbennopmap_clear_reference(vm_page_t m) 98490643Sbenno{ 98590643Sbenno TODO; 98690643Sbenno} 98790643Sbenno 98891403Ssilby/* 98991403Ssilby * pmap_ts_referenced: 99091403Ssilby * 99191403Ssilby * Return a count of reference bits for a page, clearing those bits. 99291403Ssilby * It is not necessary for every reference bit to be cleared, but it 99391403Ssilby * is necessary that 0 only be returned when there are truly no 99491403Ssilby * reference bits set. 99591403Ssilby * 99691403Ssilby * XXX: The exact number of bits to check and clear is a matter that 99791403Ssilby * should be tested and standardized at some point in the future for 99891403Ssilby * optimal aging of shared pages. 99991403Ssilby */ 100091403Ssilby 100190643Sbennoint 100290643Sbennopmap_ts_referenced(vm_page_t m) 100390643Sbenno{ 100490643Sbenno TODO; 100590643Sbenno return (0); 100690643Sbenno} 100790643Sbenno 100877957Sbenno/* 100990643Sbenno * Map a wired page into kernel virtual address space. 101077957Sbenno */ 101177957Sbennovoid 101290643Sbennopmap_kenter(vm_offset_t va, vm_offset_t pa) 101377957Sbenno{ 101490643Sbenno u_int pte_lo; 101590643Sbenno int error; 101690643Sbenno int i; 101777957Sbenno 101890643Sbenno#if 0 101990643Sbenno if (va < VM_MIN_KERNEL_ADDRESS) 102090643Sbenno panic("pmap_kenter: attempt to enter non-kernel address %#x", 102190643Sbenno va); 102290643Sbenno#endif 102377957Sbenno 102490643Sbenno pte_lo = PTE_I | PTE_G | PTE_BW; 102590643Sbenno for (i = 0; phys_avail[i + 2] != 0; i += 2) { 102690643Sbenno if (pa >= phys_avail[i] && pa < phys_avail[i + 1]) { 102790643Sbenno pte_lo &= ~(PTE_I | PTE_G); 102877957Sbenno break; 102977957Sbenno } 103077957Sbenno } 103177957Sbenno 103290643Sbenno error = pmap_pvo_enter(kernel_pmap, pmap_upvo_zone, 103390643Sbenno &pmap_pvo_kunmanaged, va, pa, pte_lo, PVO_WIRED); 103490643Sbenno 103590643Sbenno if (error != 0 && error != ENOENT) 103690643Sbenno panic("pmap_kenter: failed to enter va %#x pa %#x: %d", va, 103790643Sbenno pa, error); 103890643Sbenno 103977957Sbenno /* 104090643Sbenno * Flush the real memory from the instruction cache. 104177957Sbenno */ 104290643Sbenno if ((pte_lo & (PTE_I | PTE_G)) == 0) { 104390643Sbenno pmap_syncicache(pa, PAGE_SIZE); 104477957Sbenno } 104577957Sbenno} 104677957Sbenno 104794838Sbenno/* 104894838Sbenno * Extract the physical page address associated with the given kernel virtual 104994838Sbenno * address. 105094838Sbenno */ 105190643Sbennovm_offset_t 105290643Sbennopmap_kextract(vm_offset_t va) 105377957Sbenno{ 105494838Sbenno struct pvo_entry *pvo; 105594838Sbenno 105694838Sbenno pvo = pmap_pvo_find_va(kernel_pmap, va & ~ADDR_POFF, NULL); 105794838Sbenno if (pvo == NULL) { 105894838Sbenno return (0); 105994838Sbenno } 106094838Sbenno 106194838Sbenno return ((pvo->pvo_pte.pte_lo & PTE_RPGN) | (va & ADDR_POFF)); 106277957Sbenno} 106377957Sbenno 106491456Sbenno/* 106591456Sbenno * Remove a wired page from kernel virtual address space. 106691456Sbenno */ 106777957Sbennovoid 106877957Sbennopmap_kremove(vm_offset_t va) 106977957Sbenno{ 107091456Sbenno 107191456Sbenno pmap_remove(kernel_pmap, va, roundup(va, PAGE_SIZE)); 107277957Sbenno} 107377957Sbenno 107477957Sbenno/* 107590643Sbenno * Map a range of physical addresses into kernel virtual address space. 107690643Sbenno * 107790643Sbenno * The value passed in *virt is a suggested virtual address for the mapping. 107890643Sbenno * Architectures which can support a direct-mapped physical to virtual region 107990643Sbenno * can return the appropriate address within that region, leaving '*virt' 108090643Sbenno * unchanged. We cannot and therefore do not; *virt is updated with the 108190643Sbenno * first usable address after the mapped region. 108277957Sbenno */ 108390643Sbennovm_offset_t 108490643Sbennopmap_map(vm_offset_t *virt, vm_offset_t pa_start, vm_offset_t pa_end, int prot) 108577957Sbenno{ 108690643Sbenno vm_offset_t sva, va; 108777957Sbenno 108890643Sbenno sva = *virt; 108990643Sbenno va = sva; 109090643Sbenno for (; pa_start < pa_end; pa_start += PAGE_SIZE, va += PAGE_SIZE) 109190643Sbenno pmap_kenter(va, pa_start); 109290643Sbenno *virt = va; 109390643Sbenno return (sva); 109477957Sbenno} 109577957Sbenno 109690643Sbennoint 109790643Sbennopmap_mincore(pmap_t pmap, vm_offset_t addr) 109877957Sbenno{ 109990643Sbenno TODO; 110090643Sbenno return (0); 110177957Sbenno} 110277957Sbenno 110390643Sbenno/* 110490643Sbenno * Create the uarea for a new process. 110590643Sbenno * This routine directly affects the fork perf for a process. 110677957Sbenno */ 110777957Sbennovoid 110890643Sbennopmap_new_proc(struct proc *p) 110977957Sbenno{ 111090643Sbenno vm_object_t upobj; 111190643Sbenno vm_offset_t up; 111290643Sbenno vm_page_t m; 111390643Sbenno u_int i; 111477957Sbenno 111577957Sbenno /* 111690643Sbenno * Allocate the object for the upages. 111777957Sbenno */ 111890643Sbenno upobj = p->p_upages_obj; 111990643Sbenno if (upobj == NULL) { 112090643Sbenno upobj = vm_object_allocate(OBJT_DEFAULT, UAREA_PAGES); 112190643Sbenno p->p_upages_obj = upobj; 112277957Sbenno } 112377957Sbenno 112490643Sbenno /* 112590643Sbenno * Get a kernel virtual address for the uarea for this process. 112690643Sbenno */ 112790643Sbenno up = (vm_offset_t)p->p_uarea; 112890643Sbenno if (up == 0) { 112990643Sbenno up = kmem_alloc_nofault(kernel_map, UAREA_PAGES * PAGE_SIZE); 113090643Sbenno if (up == 0) 113190643Sbenno panic("pmap_new_proc: upage allocation failed"); 113290643Sbenno p->p_uarea = (struct user *)up; 113377957Sbenno } 113477957Sbenno 113590643Sbenno for (i = 0; i < UAREA_PAGES; i++) { 113690643Sbenno /* 113790643Sbenno * Get a uarea page. 113890643Sbenno */ 113990643Sbenno m = vm_page_grab(upobj, i, VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 114077957Sbenno 114190643Sbenno /* 114290643Sbenno * Wire the page. 114390643Sbenno */ 114490643Sbenno m->wire_count++; 114577957Sbenno 114690643Sbenno /* 114790643Sbenno * Enter the page into the kernel address space. 114890643Sbenno */ 114990643Sbenno pmap_kenter(up + i * PAGE_SIZE, VM_PAGE_TO_PHYS(m)); 115077957Sbenno 115190643Sbenno vm_page_wakeup(m); 115290643Sbenno vm_page_flag_clear(m, PG_ZERO); 115390643Sbenno vm_page_flag_set(m, PG_MAPPED | PG_WRITEABLE); 115490643Sbenno m->valid = VM_PAGE_BITS_ALL; 115577957Sbenno } 115690643Sbenno} 115777957Sbenno 115890643Sbennovoid 115994838Sbennopmap_object_init_pt(pmap_t pm, vm_offset_t addr, vm_object_t object, 116090643Sbenno vm_pindex_t pindex, vm_size_t size, int limit) 116190643Sbenno{ 116294838Sbenno 116394838Sbenno KASSERT(pm == &curproc->p_vmspace->vm_pmap || pm == kernel_pmap, 116494838Sbenno ("pmap_remove_pages: non current pmap")); 116594838Sbenno /* XXX */ 116677957Sbenno} 116777957Sbenno 116877957Sbenno/* 116990643Sbenno * Lower the permission for all mappings to a given page. 117077957Sbenno */ 117177957Sbennovoid 117277957Sbennopmap_page_protect(vm_page_t m, vm_prot_t prot) 117377957Sbenno{ 117490643Sbenno struct pvo_head *pvo_head; 117590643Sbenno struct pvo_entry *pvo, *next_pvo; 117690643Sbenno struct pte *pt; 117777957Sbenno 117890643Sbenno /* 117990643Sbenno * Since the routine only downgrades protection, if the 118090643Sbenno * maximal protection is desired, there isn't any change 118190643Sbenno * to be made. 118290643Sbenno */ 118390643Sbenno if ((prot & (VM_PROT_READ|VM_PROT_WRITE)) == 118490643Sbenno (VM_PROT_READ|VM_PROT_WRITE)) 118577957Sbenno return; 118677957Sbenno 118790643Sbenno pvo_head = vm_page_to_pvoh(m); 118890643Sbenno for (pvo = LIST_FIRST(pvo_head); pvo != NULL; pvo = next_pvo) { 118990643Sbenno next_pvo = LIST_NEXT(pvo, pvo_vlink); 119090643Sbenno PMAP_PVO_CHECK(pvo); /* sanity check */ 119190643Sbenno 119290643Sbenno /* 119390643Sbenno * Downgrading to no mapping at all, we just remove the entry. 119490643Sbenno */ 119590643Sbenno if ((prot & VM_PROT_READ) == 0) { 119690643Sbenno pmap_pvo_remove(pvo, -1); 119790643Sbenno continue; 119877957Sbenno } 119990643Sbenno 120090643Sbenno /* 120190643Sbenno * If EXEC permission is being revoked, just clear the flag 120290643Sbenno * in the PVO. 120390643Sbenno */ 120490643Sbenno if ((prot & VM_PROT_EXECUTE) == 0) 120590643Sbenno pvo->pvo_vaddr &= ~PVO_EXECUTABLE; 120690643Sbenno 120790643Sbenno /* 120890643Sbenno * If this entry is already RO, don't diddle with the page 120990643Sbenno * table. 121090643Sbenno */ 121190643Sbenno if ((pvo->pvo_pte.pte_lo & PTE_PP) == PTE_BR) { 121290643Sbenno PMAP_PVO_CHECK(pvo); 121390643Sbenno continue; 121477957Sbenno } 121590643Sbenno 121690643Sbenno /* 121790643Sbenno * Grab the PTE before we diddle the bits so pvo_to_pte can 121890643Sbenno * verify the pte contents are as expected. 121990643Sbenno */ 122090643Sbenno pt = pmap_pvo_to_pte(pvo, -1); 122190643Sbenno pvo->pvo_pte.pte_lo &= ~PTE_PP; 122290643Sbenno pvo->pvo_pte.pte_lo |= PTE_BR; 122390643Sbenno if (pt != NULL) 122490643Sbenno pmap_pte_change(pt, &pvo->pvo_pte, pvo->pvo_vaddr); 122590643Sbenno PMAP_PVO_CHECK(pvo); /* sanity check */ 122677957Sbenno } 122777957Sbenno} 122877957Sbenno 122977957Sbenno/* 123090643Sbenno * Make the specified page pageable (or not). Unneeded. 123177957Sbenno */ 123277957Sbennovoid 123390643Sbennopmap_pageable(pmap_t pmap, vm_offset_t sva, vm_offset_t eva, 123490643Sbenno boolean_t pageable) 123577957Sbenno{ 123690643Sbenno} 123777957Sbenno 123891403Ssilby/* 123991403Ssilby * Returns true if the pmap's pv is one of the first 124091403Ssilby * 16 pvs linked to from this page. This count may 124191403Ssilby * be changed upwards or downwards in the future; it 124291403Ssilby * is only necessary that true be returned for a small 124391403Ssilby * subset of pmaps for proper page aging. 124491403Ssilby */ 124590643Sbennoboolean_t 124691403Ssilbypmap_page_exists_quick(pmap_t pmap, vm_page_t m) 124790643Sbenno{ 124890643Sbenno TODO; 124990643Sbenno return (0); 125090643Sbenno} 125177957Sbenno 125290643Sbennostatic u_int pmap_vsidcontext; 125377957Sbenno 125490643Sbennovoid 125590643Sbennopmap_pinit(pmap_t pmap) 125690643Sbenno{ 125790643Sbenno int i, mask; 125890643Sbenno u_int entropy; 125977957Sbenno 126090643Sbenno entropy = 0; 126190643Sbenno __asm __volatile("mftb %0" : "=r"(entropy)); 126277957Sbenno 126390643Sbenno /* 126490643Sbenno * Allocate some segment registers for this pmap. 126590643Sbenno */ 126690643Sbenno for (i = 0; i < NPMAPS; i += VSID_NBPW) { 126790643Sbenno u_int hash, n; 126877957Sbenno 126977957Sbenno /* 127090643Sbenno * Create a new value by mutiplying by a prime and adding in 127190643Sbenno * entropy from the timebase register. This is to make the 127290643Sbenno * VSID more random so that the PT hash function collides 127390643Sbenno * less often. (Note that the prime casues gcc to do shifts 127490643Sbenno * instead of a multiply.) 127577957Sbenno */ 127690643Sbenno pmap_vsidcontext = (pmap_vsidcontext * 0x1105) + entropy; 127790643Sbenno hash = pmap_vsidcontext & (NPMAPS - 1); 127890643Sbenno if (hash == 0) /* 0 is special, avoid it */ 127990643Sbenno continue; 128090643Sbenno n = hash >> 5; 128190643Sbenno mask = 1 << (hash & (VSID_NBPW - 1)); 128290643Sbenno hash = (pmap_vsidcontext & 0xfffff); 128390643Sbenno if (pmap_vsid_bitmap[n] & mask) { /* collision? */ 128490643Sbenno /* anything free in this bucket? */ 128590643Sbenno if (pmap_vsid_bitmap[n] == 0xffffffff) { 128690643Sbenno entropy = (pmap_vsidcontext >> 20); 128790643Sbenno continue; 128890643Sbenno } 128990643Sbenno i = ffs(~pmap_vsid_bitmap[i]) - 1; 129090643Sbenno mask = 1 << i; 129190643Sbenno hash &= 0xfffff & ~(VSID_NBPW - 1); 129290643Sbenno hash |= i; 129377957Sbenno } 129490643Sbenno pmap_vsid_bitmap[n] |= mask; 129590643Sbenno for (i = 0; i < 16; i++) 129690643Sbenno pmap->pm_sr[i] = VSID_MAKE(i, hash); 129790643Sbenno return; 129890643Sbenno } 129977957Sbenno 130090643Sbenno panic("pmap_pinit: out of segments"); 130177957Sbenno} 130277957Sbenno 130377957Sbenno/* 130490643Sbenno * Initialize the pmap associated with process 0. 130577957Sbenno */ 130677957Sbennovoid 130790643Sbennopmap_pinit0(pmap_t pm) 130877957Sbenno{ 130977957Sbenno 131090643Sbenno pmap_pinit(pm); 131190643Sbenno bzero(&pm->pm_stats, sizeof(pm->pm_stats)); 131277957Sbenno} 131377957Sbenno 131477957Sbennovoid 131590643Sbennopmap_pinit2(pmap_t pmap) 131677957Sbenno{ 131790643Sbenno /* XXX: Remove this stub when no longer called */ 131890643Sbenno} 131977957Sbenno 132090643Sbennovoid 132191802Sbennopmap_prefault(pmap_t pm, vm_offset_t va, vm_map_entry_t entry) 132290643Sbenno{ 132391802Sbenno KASSERT(pm == &curproc->p_vmspace->vm_pmap || pm == kernel_pmap, 132491802Sbenno ("pmap_prefault: non current pmap")); 132591802Sbenno /* XXX */ 132690643Sbenno} 132777957Sbenno 132894838Sbenno/* 132994838Sbenno * Set the physical protection on the specified range of this map as requested. 133094838Sbenno */ 133190643Sbennovoid 133294838Sbennopmap_protect(pmap_t pm, vm_offset_t sva, vm_offset_t eva, vm_prot_t prot) 133390643Sbenno{ 133494838Sbenno struct pvo_entry *pvo; 133594838Sbenno struct pte *pt; 133694838Sbenno int pteidx; 133794838Sbenno 133894838Sbenno CTR4(KTR_PMAP, "pmap_protect: pm=%p sva=%#x eva=%#x prot=%#x", pm, sva, 133994838Sbenno eva, prot); 134094838Sbenno 134194838Sbenno 134294838Sbenno KASSERT(pm == &curproc->p_vmspace->vm_pmap || pm == kernel_pmap, 134394838Sbenno ("pmap_protect: non current pmap")); 134494838Sbenno 134594838Sbenno if ((prot & VM_PROT_READ) == VM_PROT_NONE) { 134694838Sbenno pmap_remove(pm, sva, eva); 134794838Sbenno return; 134894838Sbenno } 134994838Sbenno 135094838Sbenno for (; sva < eva; sva += PAGE_SIZE) { 135194838Sbenno pvo = pmap_pvo_find_va(pm, sva, &pteidx); 135294838Sbenno if (pvo == NULL) 135394838Sbenno continue; 135494838Sbenno 135594838Sbenno if ((prot & VM_PROT_EXECUTE) == 0) 135694838Sbenno pvo->pvo_vaddr &= ~PVO_EXECUTABLE; 135794838Sbenno 135894838Sbenno /* 135994838Sbenno * Grab the PTE pointer before we diddle with the cached PTE 136094838Sbenno * copy. 136194838Sbenno */ 136294838Sbenno pt = pmap_pvo_to_pte(pvo, pteidx); 136394838Sbenno /* 136494838Sbenno * Change the protection of the page. 136594838Sbenno */ 136694838Sbenno pvo->pvo_pte.pte_lo &= ~PTE_PP; 136794838Sbenno pvo->pvo_pte.pte_lo |= PTE_BR; 136894838Sbenno 136994838Sbenno /* 137094838Sbenno * If the PVO is in the page table, update that pte as well. 137194838Sbenno */ 137294838Sbenno if (pt != NULL) 137394838Sbenno pmap_pte_change(pt, &pvo->pvo_pte, pvo->pvo_vaddr); 137494838Sbenno } 137577957Sbenno} 137677957Sbenno 137790643Sbennovm_offset_t 137890643Sbennopmap_phys_address(int ppn) 137977957Sbenno{ 138090643Sbenno TODO; 138177957Sbenno return (0); 138277957Sbenno} 138377957Sbenno 138491456Sbenno/* 138591456Sbenno * Map a list of wired pages into kernel virtual address space. This is 138691456Sbenno * intended for temporary mappings which do not need page modification or 138791456Sbenno * references recorded. Existing mappings in the region are overwritten. 138891456Sbenno */ 138990643Sbennovoid 139090643Sbennopmap_qenter(vm_offset_t va, vm_page_t *m, int count) 139177957Sbenno{ 139290643Sbenno int i; 139377957Sbenno 139490643Sbenno for (i = 0; i < count; i++, va += PAGE_SIZE) 139590643Sbenno pmap_kenter(va, VM_PAGE_TO_PHYS(m[i])); 139690643Sbenno} 139777957Sbenno 139891456Sbenno/* 139991456Sbenno * Remove page mappings from kernel virtual address space. Intended for 140091456Sbenno * temporary mappings entered by pmap_qenter. 140191456Sbenno */ 140290643Sbennovoid 140390643Sbennopmap_qremove(vm_offset_t va, int count) 140490643Sbenno{ 140591456Sbenno int i; 140691456Sbenno 140791456Sbenno for (i = 0; i < count; i++, va += PAGE_SIZE) 140891456Sbenno pmap_kremove(va); 140977957Sbenno} 141077957Sbenno 141190643Sbennovoid 141290643Sbennopmap_release(pmap_t pmap) 141390643Sbenno{ 141490643Sbenno TODO; 141577957Sbenno} 141677957Sbenno 141791456Sbenno/* 141891456Sbenno * Remove the given range of addresses from the specified map. 141991456Sbenno */ 142090643Sbennovoid 142191456Sbennopmap_remove(pmap_t pm, vm_offset_t sva, vm_offset_t eva) 142277957Sbenno{ 142391456Sbenno struct pvo_entry *pvo; 142491456Sbenno int pteidx; 142591456Sbenno 142691456Sbenno for (; sva < eva; sva += PAGE_SIZE) { 142791456Sbenno pvo = pmap_pvo_find_va(pm, sva, &pteidx); 142891456Sbenno if (pvo != NULL) { 142991456Sbenno pmap_pvo_remove(pvo, pteidx); 143091456Sbenno } 143191456Sbenno } 143277957Sbenno} 143377957Sbenno 143494838Sbenno/* 143594838Sbenno * Remove all pages from specified address space, this aids process exit 143694838Sbenno * speeds. This is much faster than pmap_remove in the case of running down 143794838Sbenno * an entire address space. Only works for the current pmap. 143894838Sbenno */ 143990643Sbennovoid 144094838Sbennopmap_remove_pages(pmap_t pm, vm_offset_t sva, vm_offset_t eva) 144177957Sbenno{ 144294838Sbenno 144394838Sbenno KASSERT(pm == &curproc->p_vmspace->vm_pmap || pm == kernel_pmap, 144494838Sbenno ("pmap_remove_pages: non current pmap")); 144594838Sbenno pmap_remove(pm, sva, eva); 144677957Sbenno} 144777957Sbenno 144877957Sbennovoid 144990643Sbennopmap_swapin_proc(struct proc *p) 145077957Sbenno{ 145190643Sbenno TODO; 145277957Sbenno} 145377957Sbenno 145477957Sbennovoid 145590643Sbennopmap_swapout_proc(struct proc *p) 145677957Sbenno{ 145790643Sbenno TODO; 145877957Sbenno} 145977957Sbenno 146077957Sbenno/* 146190643Sbenno * Create the kernel stack and pcb for a new thread. 146290643Sbenno * This routine directly affects the fork perf for a process and 146390643Sbenno * create performance for a thread. 146477957Sbenno */ 146577957Sbennovoid 146690643Sbennopmap_new_thread(struct thread *td) 146777957Sbenno{ 146890643Sbenno vm_object_t ksobj; 146990643Sbenno vm_offset_t ks; 147090643Sbenno vm_page_t m; 147190643Sbenno u_int i; 147280431Speter 147390643Sbenno /* 147490643Sbenno * Allocate object for the kstack. 147590643Sbenno */ 147690643Sbenno ksobj = td->td_kstack_obj; 147790643Sbenno if (ksobj == NULL) { 147890643Sbenno ksobj = vm_object_allocate(OBJT_DEFAULT, KSTACK_PAGES); 147990643Sbenno td->td_kstack_obj = ksobj; 148090643Sbenno } 148190643Sbenno 148290643Sbenno /* 148390643Sbenno * Get a kernel virtual address for the kstack for this thread. 148490643Sbenno */ 148590643Sbenno ks = td->td_kstack; 148690643Sbenno if (ks == 0) { 148790643Sbenno ks = kmem_alloc_nofault(kernel_map, 148890643Sbenno (KSTACK_PAGES + KSTACK_GUARD_PAGES) * PAGE_SIZE); 148990643Sbenno if (ks == 0) 149090643Sbenno panic("pmap_new_thread: kstack allocation failed"); 149190643Sbenno TLBIE(ks); 149290643Sbenno ks += KSTACK_GUARD_PAGES * PAGE_SIZE; 149390643Sbenno td->td_kstack = ks; 149490643Sbenno } 149590643Sbenno 149690643Sbenno for (i = 0; i < KSTACK_PAGES; i++) { 149790643Sbenno /* 149890643Sbenno * Get a kernel stack page. 149990643Sbenno */ 150090643Sbenno m = vm_page_grab(ksobj, i, VM_ALLOC_NORMAL | VM_ALLOC_RETRY); 150190643Sbenno 150290643Sbenno /* 150390643Sbenno * Wire the page. 150490643Sbenno */ 150590643Sbenno m->wire_count++; 150690643Sbenno 150790643Sbenno /* 150890643Sbenno * Enter the page into the kernel address space. 150990643Sbenno */ 151090643Sbenno pmap_kenter(ks + i * PAGE_SIZE, VM_PAGE_TO_PHYS(m)); 151190643Sbenno 151290643Sbenno vm_page_wakeup(m); 151390643Sbenno vm_page_flag_clear(m, PG_ZERO); 151490643Sbenno vm_page_flag_set(m, PG_MAPPED | PG_WRITEABLE); 151590643Sbenno m->valid = VM_PAGE_BITS_ALL; 151690643Sbenno } 151777957Sbenno} 151877957Sbenno 151977957Sbennovoid 152090643Sbennopmap_dispose_proc(struct proc *p) 152177957Sbenno{ 152290643Sbenno TODO; 152377957Sbenno} 152477957Sbenno 152577957Sbennovoid 152690643Sbennopmap_dispose_thread(struct thread *td) 152777957Sbenno{ 152890643Sbenno TODO; 152977957Sbenno} 153077957Sbenno 153177957Sbennovoid 153290643Sbennopmap_swapin_thread(struct thread *td) 153383682Smp{ 153490643Sbenno TODO; 153583682Smp} 153683682Smp 153783682Smpvoid 153890643Sbennopmap_swapout_thread(struct thread *td) 153983682Smp{ 154090643Sbenno TODO; 154183682Smp} 154283682Smp 154383682Smp/* 154490643Sbenno * Allocate a physical page of memory directly from the phys_avail map. 154590643Sbenno * Can only be called from pmap_bootstrap before avail start and end are 154690643Sbenno * calculated. 154783682Smp */ 154890643Sbennostatic vm_offset_t 154990643Sbennopmap_bootstrap_alloc(vm_size_t size, u_int align) 155083682Smp{ 155190643Sbenno vm_offset_t s, e; 155290643Sbenno int i, j; 155383682Smp 155490643Sbenno size = round_page(size); 155590643Sbenno for (i = 0; phys_avail[i + 1] != 0; i += 2) { 155690643Sbenno if (align != 0) 155790643Sbenno s = (phys_avail[i] + align - 1) & ~(align - 1); 155890643Sbenno else 155990643Sbenno s = phys_avail[i]; 156090643Sbenno e = s + size; 156190643Sbenno 156290643Sbenno if (s < phys_avail[i] || e > phys_avail[i + 1]) 156390643Sbenno continue; 156490643Sbenno 156590643Sbenno if (s == phys_avail[i]) { 156690643Sbenno phys_avail[i] += size; 156790643Sbenno } else if (e == phys_avail[i + 1]) { 156890643Sbenno phys_avail[i + 1] -= size; 156990643Sbenno } else { 157090643Sbenno for (j = phys_avail_count * 2; j > i; j -= 2) { 157190643Sbenno phys_avail[j] = phys_avail[j - 2]; 157290643Sbenno phys_avail[j + 1] = phys_avail[j - 1]; 157390643Sbenno } 157490643Sbenno 157590643Sbenno phys_avail[i + 3] = phys_avail[i + 1]; 157690643Sbenno phys_avail[i + 1] = s; 157790643Sbenno phys_avail[i + 2] = e; 157890643Sbenno phys_avail_count++; 157990643Sbenno } 158090643Sbenno 158190643Sbenno return (s); 158283682Smp } 158390643Sbenno panic("pmap_bootstrap_alloc: could not allocate memory"); 158483682Smp} 158583682Smp 158683682Smp/* 158790643Sbenno * Return an unmapped pvo for a kernel virtual address. 158890643Sbenno * Used by pmap functions that operate on physical pages. 158983682Smp */ 159090643Sbennostatic struct pvo_entry * 159190643Sbennopmap_rkva_alloc(void) 159283682Smp{ 159390643Sbenno struct pvo_entry *pvo; 159490643Sbenno struct pte *pt; 159590643Sbenno vm_offset_t kva; 159690643Sbenno int pteidx; 159783682Smp 159890643Sbenno if (pmap_rkva_count == 0) 159990643Sbenno panic("pmap_rkva_alloc: no more reserved KVAs"); 160090643Sbenno 160190643Sbenno kva = pmap_rkva_start + (PAGE_SIZE * --pmap_rkva_count); 160290643Sbenno pmap_kenter(kva, 0); 160390643Sbenno 160490643Sbenno pvo = pmap_pvo_find_va(kernel_pmap, kva, &pteidx); 160590643Sbenno 160690643Sbenno if (pvo == NULL) 160790643Sbenno panic("pmap_kva_alloc: pmap_pvo_find_va failed"); 160890643Sbenno 160990643Sbenno pt = pmap_pvo_to_pte(pvo, pteidx); 161090643Sbenno 161190643Sbenno if (pt == NULL) 161290643Sbenno panic("pmap_kva_alloc: pmap_pvo_to_pte failed"); 161390643Sbenno 161490643Sbenno pmap_pte_unset(pt, &pvo->pvo_pte, pvo->pvo_vaddr); 161590643Sbenno PVO_PTEGIDX_CLR(pvo); 161690643Sbenno 161790643Sbenno pmap_pte_overflow++; 161890643Sbenno 161990643Sbenno return (pvo); 162090643Sbenno} 162190643Sbenno 162290643Sbennostatic void 162390643Sbennopmap_pa_map(struct pvo_entry *pvo, vm_offset_t pa, struct pte *saved_pt, 162490643Sbenno int *depth_p) 162590643Sbenno{ 162690643Sbenno struct pte *pt; 162790643Sbenno 162890643Sbenno /* 162990643Sbenno * If this pvo already has a valid pte, we need to save it so it can 163090643Sbenno * be restored later. We then just reload the new PTE over the old 163190643Sbenno * slot. 163290643Sbenno */ 163390643Sbenno if (saved_pt != NULL) { 163490643Sbenno pt = pmap_pvo_to_pte(pvo, -1); 163590643Sbenno 163690643Sbenno if (pt != NULL) { 163790643Sbenno pmap_pte_unset(pt, &pvo->pvo_pte, pvo->pvo_vaddr); 163890643Sbenno PVO_PTEGIDX_CLR(pvo); 163990643Sbenno pmap_pte_overflow++; 164083682Smp } 164190643Sbenno 164290643Sbenno *saved_pt = pvo->pvo_pte; 164390643Sbenno 164490643Sbenno pvo->pvo_pte.pte_lo &= ~PTE_RPGN; 164583682Smp } 164690643Sbenno 164790643Sbenno pvo->pvo_pte.pte_lo |= pa; 164890643Sbenno 164990643Sbenno if (!pmap_pte_spill(pvo->pvo_vaddr)) 165090643Sbenno panic("pmap_pa_map: could not spill pvo %p", pvo); 165190643Sbenno 165290643Sbenno if (depth_p != NULL) 165390643Sbenno (*depth_p)++; 165483682Smp} 165583682Smp 165690643Sbennostatic void 165790643Sbennopmap_pa_unmap(struct pvo_entry *pvo, struct pte *saved_pt, int *depth_p) 165877957Sbenno{ 165990643Sbenno struct pte *pt; 166077957Sbenno 166190643Sbenno pt = pmap_pvo_to_pte(pvo, -1); 166290643Sbenno 166390643Sbenno if (pt != NULL) { 166490643Sbenno pmap_pte_unset(pt, &pvo->pvo_pte, pvo->pvo_vaddr); 166590643Sbenno PVO_PTEGIDX_CLR(pvo); 166690643Sbenno pmap_pte_overflow++; 166790643Sbenno } 166890643Sbenno 166990643Sbenno pvo->pvo_pte.pte_lo &= ~PTE_RPGN; 167090643Sbenno 167190643Sbenno /* 167290643Sbenno * If there is a saved PTE and it's valid, restore it and return. 167390643Sbenno */ 167490643Sbenno if (saved_pt != NULL && (saved_pt->pte_lo & PTE_RPGN) != 0) { 167590643Sbenno if (depth_p != NULL && --(*depth_p) == 0) 167690643Sbenno panic("pmap_pa_unmap: restoring but depth == 0"); 167790643Sbenno 167890643Sbenno pvo->pvo_pte = *saved_pt; 167990643Sbenno 168090643Sbenno if (!pmap_pte_spill(pvo->pvo_vaddr)) 168190643Sbenno panic("pmap_pa_unmap: could not spill pvo %p", pvo); 168290643Sbenno } 168377957Sbenno} 168477957Sbenno 168590643Sbennostatic void 168690643Sbennopmap_syncicache(vm_offset_t pa, vm_size_t len) 168777957Sbenno{ 168890643Sbenno __syncicache((void *)pa, len); 168990643Sbenno} 169077957Sbenno 169190643Sbennostatic void 169290643Sbennotlbia(void) 169390643Sbenno{ 169490643Sbenno caddr_t i; 169590643Sbenno 169690643Sbenno SYNC(); 169790643Sbenno for (i = 0; i < (caddr_t)0x00040000; i += 0x00001000) { 169890643Sbenno TLBIE(i); 169990643Sbenno EIEIO(); 170090643Sbenno } 170190643Sbenno TLBSYNC(); 170290643Sbenno SYNC(); 170377957Sbenno} 170477957Sbenno 170590643Sbennostatic int 170692847Sjeffpmap_pvo_enter(pmap_t pm, uma_zone_t zone, struct pvo_head *pvo_head, 170790643Sbenno vm_offset_t va, vm_offset_t pa, u_int pte_lo, int flags) 170877957Sbenno{ 170990643Sbenno struct pvo_entry *pvo; 171090643Sbenno u_int sr; 171190643Sbenno int first; 171290643Sbenno u_int ptegidx; 171390643Sbenno int i; 171477957Sbenno 171590643Sbenno pmap_pvo_enter_calls++; 171696250Sbenno first = 0; 171790643Sbenno 171890643Sbenno /* 171990643Sbenno * Compute the PTE Group index. 172090643Sbenno */ 172190643Sbenno va &= ~ADDR_POFF; 172290643Sbenno sr = va_to_sr(pm->pm_sr, va); 172390643Sbenno ptegidx = va_to_pteg(sr, va); 172490643Sbenno 172590643Sbenno /* 172690643Sbenno * Remove any existing mapping for this page. Reuse the pvo entry if 172790643Sbenno * there is a mapping. 172890643Sbenno */ 172990643Sbenno LIST_FOREACH(pvo, &pmap_pvo_table[ptegidx], pvo_olink) { 173090643Sbenno if (pvo->pvo_pmap == pm && PVO_VADDR(pvo) == va) { 173192521Sbenno if ((pvo->pvo_pte.pte_lo & PTE_RPGN) == pa) 173292521Sbenno return (0); 173390643Sbenno pmap_pvo_remove(pvo, -1); 173490643Sbenno break; 173590643Sbenno } 173690643Sbenno } 173790643Sbenno 173890643Sbenno /* 173990643Sbenno * If we aren't overwriting a mapping, try to allocate. 174090643Sbenno */ 174192521Sbenno if (pmap_initialized) { 174292847Sjeff pvo = uma_zalloc(zone, M_NOWAIT); 174392521Sbenno } else { 174492521Sbenno if (pmap_bpvo_pool_index >= pmap_bpvo_pool_count) { 174592521Sbenno pmap_bpvo_pool = (struct pvo_entry *) 174692521Sbenno pmap_bootstrap_alloc(PAGE_SIZE, 0); 174792521Sbenno pmap_bpvo_pool_index = 0; 174892521Sbenno } 174992521Sbenno pvo = &pmap_bpvo_pool[pmap_bpvo_pool_index]; 175092521Sbenno pmap_bpvo_pool_index++; 175192521Sbenno pvo->pvo_vaddr |= PVO_BOOTSTRAP; 175292521Sbenno } 175390643Sbenno 175490643Sbenno if (pvo == NULL) { 175590643Sbenno return (ENOMEM); 175690643Sbenno } 175790643Sbenno 175890643Sbenno pmap_pvo_entries++; 175990643Sbenno pvo->pvo_vaddr = va; 176090643Sbenno pvo->pvo_pmap = pm; 176190643Sbenno LIST_INSERT_HEAD(&pmap_pvo_table[ptegidx], pvo, pvo_olink); 176290643Sbenno pvo->pvo_vaddr &= ~ADDR_POFF; 176390643Sbenno if (flags & VM_PROT_EXECUTE) 176490643Sbenno pvo->pvo_vaddr |= PVO_EXECUTABLE; 176590643Sbenno if (flags & PVO_WIRED) 176690643Sbenno pvo->pvo_vaddr |= PVO_WIRED; 176790643Sbenno if (pvo_head != &pmap_pvo_kunmanaged) 176890643Sbenno pvo->pvo_vaddr |= PVO_MANAGED; 176990643Sbenno pmap_pte_create(&pvo->pvo_pte, sr, va, pa | pte_lo); 177090643Sbenno 177190643Sbenno /* 177290643Sbenno * Remember if the list was empty and therefore will be the first 177390643Sbenno * item. 177490643Sbenno */ 177596250Sbenno if (LIST_FIRST(pvo_head) == NULL) 177696250Sbenno first = 1; 177790643Sbenno 177890643Sbenno LIST_INSERT_HEAD(pvo_head, pvo, pvo_vlink); 177990643Sbenno if (pvo->pvo_pte.pte_lo & PVO_WIRED) 178090643Sbenno pvo->pvo_pmap->pm_stats.wired_count++; 178190643Sbenno pvo->pvo_pmap->pm_stats.resident_count++; 178290643Sbenno 178390643Sbenno /* 178490643Sbenno * We hope this succeeds but it isn't required. 178590643Sbenno */ 178690643Sbenno i = pmap_pte_insert(ptegidx, &pvo->pvo_pte); 178790643Sbenno if (i >= 0) { 178890643Sbenno PVO_PTEGIDX_SET(pvo, i); 178990643Sbenno } else { 179090643Sbenno panic("pmap_pvo_enter: overflow"); 179190643Sbenno pmap_pte_overflow++; 179290643Sbenno } 179390643Sbenno 179490643Sbenno return (first ? ENOENT : 0); 179577957Sbenno} 179677957Sbenno 179790643Sbennostatic void 179890643Sbennopmap_pvo_remove(struct pvo_entry *pvo, int pteidx) 179977957Sbenno{ 180090643Sbenno struct pte *pt; 180177957Sbenno 180290643Sbenno /* 180390643Sbenno * If there is an active pte entry, we need to deactivate it (and 180490643Sbenno * save the ref & cfg bits). 180590643Sbenno */ 180690643Sbenno pt = pmap_pvo_to_pte(pvo, pteidx); 180790643Sbenno if (pt != NULL) { 180890643Sbenno pmap_pte_unset(pt, &pvo->pvo_pte, pvo->pvo_vaddr); 180990643Sbenno PVO_PTEGIDX_CLR(pvo); 181090643Sbenno } else { 181190643Sbenno pmap_pte_overflow--; 181290643Sbenno } 181390643Sbenno 181490643Sbenno /* 181590643Sbenno * Update our statistics. 181690643Sbenno */ 181790643Sbenno pvo->pvo_pmap->pm_stats.resident_count--; 181890643Sbenno if (pvo->pvo_pte.pte_lo & PVO_WIRED) 181990643Sbenno pvo->pvo_pmap->pm_stats.wired_count--; 182090643Sbenno 182190643Sbenno /* 182290643Sbenno * Save the REF/CHG bits into their cache if the page is managed. 182390643Sbenno */ 182490643Sbenno if (pvo->pvo_vaddr & PVO_MANAGED) { 182590643Sbenno struct vm_page *pg; 182690643Sbenno 182792067Sbenno pg = PHYS_TO_VM_PAGE(pvo->pvo_pte.pte_lo & PTE_RPGN); 182890643Sbenno if (pg != NULL) { 182990643Sbenno pmap_attr_save(pg, pvo->pvo_pte.pte_lo & 183090643Sbenno (PTE_REF | PTE_CHG)); 183190643Sbenno } 183290643Sbenno } 183390643Sbenno 183490643Sbenno /* 183590643Sbenno * Remove this PVO from the PV list. 183690643Sbenno */ 183790643Sbenno LIST_REMOVE(pvo, pvo_vlink); 183890643Sbenno 183990643Sbenno /* 184090643Sbenno * Remove this from the overflow list and return it to the pool 184190643Sbenno * if we aren't going to reuse it. 184290643Sbenno */ 184390643Sbenno LIST_REMOVE(pvo, pvo_olink); 184492521Sbenno if (!(pvo->pvo_vaddr & PVO_BOOTSTRAP)) 184592847Sjeff uma_zfree(pvo->pvo_vaddr & PVO_MANAGED ? pmap_mpvo_zone : 184692521Sbenno pmap_upvo_zone, pvo); 184790643Sbenno pmap_pvo_entries--; 184890643Sbenno pmap_pvo_remove_calls++; 184977957Sbenno} 185077957Sbenno 185190643Sbennostatic __inline int 185290643Sbennopmap_pvo_pte_index(const struct pvo_entry *pvo, int ptegidx) 185377957Sbenno{ 185490643Sbenno int pteidx; 185577957Sbenno 185690643Sbenno /* 185790643Sbenno * We can find the actual pte entry without searching by grabbing 185890643Sbenno * the PTEG index from 3 unused bits in pte_lo[11:9] and by 185990643Sbenno * noticing the HID bit. 186090643Sbenno */ 186190643Sbenno pteidx = ptegidx * 8 + PVO_PTEGIDX_GET(pvo); 186290643Sbenno if (pvo->pvo_pte.pte_hi & PTE_HID) 186390643Sbenno pteidx ^= pmap_pteg_mask * 8; 186490643Sbenno 186590643Sbenno return (pteidx); 186677957Sbenno} 186777957Sbenno 186890643Sbennostatic struct pvo_entry * 186990643Sbennopmap_pvo_find_va(pmap_t pm, vm_offset_t va, int *pteidx_p) 187077957Sbenno{ 187190643Sbenno struct pvo_entry *pvo; 187290643Sbenno int ptegidx; 187390643Sbenno u_int sr; 187477957Sbenno 187590643Sbenno va &= ~ADDR_POFF; 187690643Sbenno sr = va_to_sr(pm->pm_sr, va); 187790643Sbenno ptegidx = va_to_pteg(sr, va); 187890643Sbenno 187990643Sbenno LIST_FOREACH(pvo, &pmap_pvo_table[ptegidx], pvo_olink) { 188090643Sbenno if (pvo->pvo_pmap == pm && PVO_VADDR(pvo) == va) { 188190643Sbenno if (pteidx_p) 188290643Sbenno *pteidx_p = pmap_pvo_pte_index(pvo, ptegidx); 188390643Sbenno return (pvo); 188490643Sbenno } 188590643Sbenno } 188690643Sbenno 188790643Sbenno return (NULL); 188877957Sbenno} 188977957Sbenno 189090643Sbennostatic struct pte * 189190643Sbennopmap_pvo_to_pte(const struct pvo_entry *pvo, int pteidx) 189277957Sbenno{ 189390643Sbenno struct pte *pt; 189477957Sbenno 189590643Sbenno /* 189690643Sbenno * If we haven't been supplied the ptegidx, calculate it. 189790643Sbenno */ 189890643Sbenno if (pteidx == -1) { 189990643Sbenno int ptegidx; 190090643Sbenno u_int sr; 190177957Sbenno 190290643Sbenno sr = va_to_sr(pvo->pvo_pmap->pm_sr, pvo->pvo_vaddr); 190390643Sbenno ptegidx = va_to_pteg(sr, pvo->pvo_vaddr); 190490643Sbenno pteidx = pmap_pvo_pte_index(pvo, ptegidx); 190590643Sbenno } 190690643Sbenno 190790643Sbenno pt = &pmap_pteg_table[pteidx >> 3].pt[pteidx & 7]; 190890643Sbenno 190990643Sbenno if ((pvo->pvo_pte.pte_hi & PTE_VALID) && !PVO_PTEGIDX_ISSET(pvo)) { 191090643Sbenno panic("pmap_pvo_to_pte: pvo %p has valid pte in pvo but no " 191190643Sbenno "valid pte index", pvo); 191290643Sbenno } 191390643Sbenno 191490643Sbenno if ((pvo->pvo_pte.pte_hi & PTE_VALID) == 0 && PVO_PTEGIDX_ISSET(pvo)) { 191590643Sbenno panic("pmap_pvo_to_pte: pvo %p has valid pte index in pvo " 191690643Sbenno "pvo but no valid pte", pvo); 191790643Sbenno } 191890643Sbenno 191990643Sbenno if ((pt->pte_hi ^ (pvo->pvo_pte.pte_hi & ~PTE_VALID)) == PTE_VALID) { 192090643Sbenno if ((pvo->pvo_pte.pte_hi & PTE_VALID) == 0) { 192190643Sbenno panic("pmap_pvo_to_pte: pvo %p has valid pte in " 192290643Sbenno "pmap_pteg_table %p but invalid in pvo", pvo, pt); 192377957Sbenno } 192490643Sbenno 192590643Sbenno if (((pt->pte_lo ^ pvo->pvo_pte.pte_lo) & ~(PTE_CHG|PTE_REF)) 192690643Sbenno != 0) { 192790643Sbenno panic("pmap_pvo_to_pte: pvo %p pte does not match " 192890643Sbenno "pte %p in pmap_pteg_table", pvo, pt); 192990643Sbenno } 193090643Sbenno 193190643Sbenno return (pt); 193277957Sbenno } 193377957Sbenno 193490643Sbenno if (pvo->pvo_pte.pte_hi & PTE_VALID) { 193590643Sbenno panic("pmap_pvo_to_pte: pvo %p has invalid pte %p in " 193690643Sbenno "pmap_pteg_table but valid in pvo", pvo, pt); 193790643Sbenno } 193877957Sbenno 193990643Sbenno return (NULL); 194077957Sbenno} 194178880Sbenno 194292654Sjeffstatic void * 194392654Sjeffpmap_pvo_allocf(uma_zone_t zone, int bytes, u_int8_t *flags, int wait) 194492654Sjeff{ 194592654Sjeff vm_page_t m; 194692654Sjeff 194792654Sjeff if (bytes != PAGE_SIZE) 194892654Sjeff panic("pmap_pvo_allocf: benno was shortsighted. hit him."); 194992654Sjeff 195092654Sjeff *flags = UMA_SLAB_PRIV; 195192654Sjeff m = vm_page_alloc(pmap_pvo_obj, pmap_pvo_count, VM_ALLOC_SYSTEM); 195292654Sjeff if (m == NULL) 195392654Sjeff return (NULL); 195492757Sbenno pmap_pvo_count++; 195592654Sjeff return ((void *)VM_PAGE_TO_PHYS(m)); 195692654Sjeff} 195792654Sjeff 195878880Sbenno/* 195990643Sbenno * XXX: THIS STUFF SHOULD BE IN pte.c? 196078880Sbenno */ 196190643Sbennoint 196290643Sbennopmap_pte_spill(vm_offset_t addr) 196378880Sbenno{ 196490643Sbenno struct pvo_entry *source_pvo, *victim_pvo; 196590643Sbenno struct pvo_entry *pvo; 196690643Sbenno int ptegidx, i, j; 196790643Sbenno u_int sr; 196890643Sbenno struct pteg *pteg; 196990643Sbenno struct pte *pt; 197078880Sbenno 197190643Sbenno pmap_pte_spills++; 197290643Sbenno 197394836Sbenno sr = mfsrin(addr); 197490643Sbenno ptegidx = va_to_pteg(sr, addr); 197590643Sbenno 197678880Sbenno /* 197790643Sbenno * Have to substitute some entry. Use the primary hash for this. 197890643Sbenno * Use low bits of timebase as random generator. 197978880Sbenno */ 198090643Sbenno pteg = &pmap_pteg_table[ptegidx]; 198190643Sbenno __asm __volatile("mftb %0" : "=r"(i)); 198290643Sbenno i &= 7; 198390643Sbenno pt = &pteg->pt[i]; 198478880Sbenno 198590643Sbenno source_pvo = NULL; 198690643Sbenno victim_pvo = NULL; 198790643Sbenno LIST_FOREACH(pvo, &pmap_pvo_table[ptegidx], pvo_olink) { 198878880Sbenno /* 198990643Sbenno * We need to find a pvo entry for this address. 199078880Sbenno */ 199190643Sbenno PMAP_PVO_CHECK(pvo); 199290643Sbenno if (source_pvo == NULL && 199390643Sbenno pmap_pte_match(&pvo->pvo_pte, sr, addr, 199490643Sbenno pvo->pvo_pte.pte_hi & PTE_HID)) { 199590643Sbenno /* 199690643Sbenno * Now found an entry to be spilled into the pteg. 199790643Sbenno * The PTE is now valid, so we know it's active. 199890643Sbenno */ 199990643Sbenno j = pmap_pte_insert(ptegidx, &pvo->pvo_pte); 200078880Sbenno 200190643Sbenno if (j >= 0) { 200290643Sbenno PVO_PTEGIDX_SET(pvo, j); 200390643Sbenno pmap_pte_overflow--; 200490643Sbenno PMAP_PVO_CHECK(pvo); 200590643Sbenno return (1); 200690643Sbenno } 200790643Sbenno 200890643Sbenno source_pvo = pvo; 200990643Sbenno 201090643Sbenno if (victim_pvo != NULL) 201190643Sbenno break; 201290643Sbenno } 201390643Sbenno 201478880Sbenno /* 201590643Sbenno * We also need the pvo entry of the victim we are replacing 201690643Sbenno * so save the R & C bits of the PTE. 201778880Sbenno */ 201890643Sbenno if ((pt->pte_hi & PTE_HID) == 0 && victim_pvo == NULL && 201990643Sbenno pmap_pte_compare(pt, &pvo->pvo_pte)) { 202090643Sbenno victim_pvo = pvo; 202190643Sbenno if (source_pvo != NULL) 202290643Sbenno break; 202390643Sbenno } 202490643Sbenno } 202578880Sbenno 202690643Sbenno if (source_pvo == NULL) 202790643Sbenno return (0); 202890643Sbenno 202990643Sbenno if (victim_pvo == NULL) { 203090643Sbenno if ((pt->pte_hi & PTE_HID) == 0) 203190643Sbenno panic("pmap_pte_spill: victim p-pte (%p) has no pvo" 203290643Sbenno "entry", pt); 203390643Sbenno 203478880Sbenno /* 203590643Sbenno * If this is a secondary PTE, we need to search it's primary 203690643Sbenno * pvo bucket for the matching PVO. 203778880Sbenno */ 203890643Sbenno LIST_FOREACH(pvo, &pmap_pvo_table[ptegidx ^ pmap_pteg_mask], 203990643Sbenno pvo_olink) { 204090643Sbenno PMAP_PVO_CHECK(pvo); 204190643Sbenno /* 204290643Sbenno * We also need the pvo entry of the victim we are 204390643Sbenno * replacing so save the R & C bits of the PTE. 204490643Sbenno */ 204590643Sbenno if (pmap_pte_compare(pt, &pvo->pvo_pte)) { 204690643Sbenno victim_pvo = pvo; 204790643Sbenno break; 204890643Sbenno } 204990643Sbenno } 205078880Sbenno 205190643Sbenno if (victim_pvo == NULL) 205290643Sbenno panic("pmap_pte_spill: victim s-pte (%p) has no pvo" 205390643Sbenno "entry", pt); 205490643Sbenno } 205578880Sbenno 205690643Sbenno /* 205790643Sbenno * We are invalidating the TLB entry for the EA we are replacing even 205890643Sbenno * though it's valid. If we don't, we lose any ref/chg bit changes 205990643Sbenno * contained in the TLB entry. 206090643Sbenno */ 206190643Sbenno source_pvo->pvo_pte.pte_hi &= ~PTE_HID; 206278880Sbenno 206390643Sbenno pmap_pte_unset(pt, &victim_pvo->pvo_pte, victim_pvo->pvo_vaddr); 206490643Sbenno pmap_pte_set(pt, &source_pvo->pvo_pte); 206590643Sbenno 206690643Sbenno PVO_PTEGIDX_CLR(victim_pvo); 206790643Sbenno PVO_PTEGIDX_SET(source_pvo, i); 206890643Sbenno pmap_pte_replacements++; 206990643Sbenno 207090643Sbenno PMAP_PVO_CHECK(victim_pvo); 207190643Sbenno PMAP_PVO_CHECK(source_pvo); 207290643Sbenno 207390643Sbenno return (1); 207490643Sbenno} 207590643Sbenno 207690643Sbennostatic int 207790643Sbennopmap_pte_insert(u_int ptegidx, struct pte *pvo_pt) 207890643Sbenno{ 207990643Sbenno struct pte *pt; 208090643Sbenno int i; 208190643Sbenno 208290643Sbenno /* 208390643Sbenno * First try primary hash. 208490643Sbenno */ 208590643Sbenno for (pt = pmap_pteg_table[ptegidx].pt, i = 0; i < 8; i++, pt++) { 208690643Sbenno if ((pt->pte_hi & PTE_VALID) == 0) { 208790643Sbenno pvo_pt->pte_hi &= ~PTE_HID; 208890643Sbenno pmap_pte_set(pt, pvo_pt); 208990643Sbenno return (i); 209078880Sbenno } 209190643Sbenno } 209278880Sbenno 209390643Sbenno /* 209490643Sbenno * Now try secondary hash. 209590643Sbenno */ 209690643Sbenno ptegidx ^= pmap_pteg_mask; 209790643Sbenno ptegidx++; 209890643Sbenno for (pt = pmap_pteg_table[ptegidx].pt, i = 0; i < 8; i++, pt++) { 209990643Sbenno if ((pt->pte_hi & PTE_VALID) == 0) { 210090643Sbenno pvo_pt->pte_hi |= PTE_HID; 210190643Sbenno pmap_pte_set(pt, pvo_pt); 210290643Sbenno return (i); 210390643Sbenno } 210490643Sbenno } 210578880Sbenno 210690643Sbenno panic("pmap_pte_insert: overflow"); 210790643Sbenno return (-1); 210878880Sbenno} 210984921Sbenno 211090643Sbennostatic boolean_t 211190643Sbennopmap_query_bit(vm_page_t m, int ptebit) 211284921Sbenno{ 211390643Sbenno struct pvo_entry *pvo; 211490643Sbenno struct pte *pt; 211584921Sbenno 211690643Sbenno if (pmap_attr_fetch(m) & ptebit) 211790643Sbenno return (TRUE); 211884921Sbenno 211990643Sbenno LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) { 212090643Sbenno PMAP_PVO_CHECK(pvo); /* sanity check */ 212184921Sbenno 212290643Sbenno /* 212390643Sbenno * See if we saved the bit off. If so, cache it and return 212490643Sbenno * success. 212590643Sbenno */ 212690643Sbenno if (pvo->pvo_pte.pte_lo & ptebit) { 212790643Sbenno pmap_attr_save(m, ptebit); 212890643Sbenno PMAP_PVO_CHECK(pvo); /* sanity check */ 212990643Sbenno return (TRUE); 213090643Sbenno } 213190643Sbenno } 213284921Sbenno 213390643Sbenno /* 213490643Sbenno * No luck, now go through the hard part of looking at the PTEs 213590643Sbenno * themselves. Sync so that any pending REF/CHG bits are flushed to 213690643Sbenno * the PTEs. 213790643Sbenno */ 213890643Sbenno SYNC(); 213990643Sbenno LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) { 214090643Sbenno PMAP_PVO_CHECK(pvo); /* sanity check */ 214190643Sbenno 214290643Sbenno /* 214390643Sbenno * See if this pvo has a valid PTE. if so, fetch the 214490643Sbenno * REF/CHG bits from the valid PTE. If the appropriate 214590643Sbenno * ptebit is set, cache it and return success. 214690643Sbenno */ 214790643Sbenno pt = pmap_pvo_to_pte(pvo, -1); 214890643Sbenno if (pt != NULL) { 214990643Sbenno pmap_pte_synch(pt, &pvo->pvo_pte); 215090643Sbenno if (pvo->pvo_pte.pte_lo & ptebit) { 215190643Sbenno pmap_attr_save(m, ptebit); 215290643Sbenno PMAP_PVO_CHECK(pvo); /* sanity check */ 215390643Sbenno return (TRUE); 215490643Sbenno } 215590643Sbenno } 215684921Sbenno } 215784921Sbenno 215890643Sbenno return (TRUE); 215984921Sbenno} 216090643Sbenno 216190643Sbennostatic boolean_t 216290643Sbennopmap_clear_bit(vm_page_t m, int ptebit) 216390643Sbenno{ 216490643Sbenno struct pvo_entry *pvo; 216590643Sbenno struct pte *pt; 216690643Sbenno int rv; 216790643Sbenno 216890643Sbenno /* 216990643Sbenno * Clear the cached value. 217090643Sbenno */ 217190643Sbenno rv = pmap_attr_fetch(m); 217290643Sbenno pmap_attr_clear(m, ptebit); 217390643Sbenno 217490643Sbenno /* 217590643Sbenno * Sync so that any pending REF/CHG bits are flushed to the PTEs (so 217690643Sbenno * we can reset the right ones). note that since the pvo entries and 217790643Sbenno * list heads are accessed via BAT0 and are never placed in the page 217890643Sbenno * table, we don't have to worry about further accesses setting the 217990643Sbenno * REF/CHG bits. 218090643Sbenno */ 218190643Sbenno SYNC(); 218290643Sbenno 218390643Sbenno /* 218490643Sbenno * For each pvo entry, clear the pvo's ptebit. If this pvo has a 218590643Sbenno * valid pte clear the ptebit from the valid pte. 218690643Sbenno */ 218790643Sbenno LIST_FOREACH(pvo, vm_page_to_pvoh(m), pvo_vlink) { 218890643Sbenno PMAP_PVO_CHECK(pvo); /* sanity check */ 218990643Sbenno pt = pmap_pvo_to_pte(pvo, -1); 219090643Sbenno if (pt != NULL) { 219190643Sbenno pmap_pte_synch(pt, &pvo->pvo_pte); 219290643Sbenno if (pvo->pvo_pte.pte_lo & ptebit) 219390643Sbenno pmap_pte_clear(pt, PVO_VADDR(pvo), ptebit); 219490643Sbenno } 219590643Sbenno rv |= pvo->pvo_pte.pte_lo; 219690643Sbenno pvo->pvo_pte.pte_lo &= ~ptebit; 219790643Sbenno PMAP_PVO_CHECK(pvo); /* sanity check */ 219890643Sbenno } 219990643Sbenno 220090643Sbenno return ((rv & ptebit) != 0); 220190643Sbenno} 2202