/* $OpenBSD: pmap.h,v 1.41 2025/09/18 14:54:33 kettenis Exp $ */ /* $NetBSD: pmap.h,v 1.16 2001/04/22 23:19:30 thorpej Exp $ */ /*- * Copyright (C) 1995, 1996 Wolfgang Solfrank. * Copyright (C) 1995, 1996 TooLs GmbH. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by TooLs GmbH. * 4. The name of TooLs GmbH may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef _MACHINE_PMAP_H_ #define _MACHINE_PMAP_H_ #ifndef _LOCORE #ifdef _KERNEL #include <sys/queue.h> #endif #include <sys/mutex.h> #endif #define __HAVE_PMAP_PURGE /* * This scheme uses 2-level page tables. * * While we're still in 32-bit mode we do the following: * * offset: 13 bits * 1st level: 1024 64-bit TTEs in an 8K page for 10 bits * 2nd level: 512 32-bit pointers in the pmap for 9 bits * ------- * total: 32 bits * * In 64-bit mode the Spitfire and Blackbird CPUs support only * 44-bit virtual addresses. All addresses between * 0x0000 07ff ffff ffff and 0xffff f800 0000 0000 are in the * "VA hole" and trap, so we don't have to track them. However, * we do need to keep them in mind during PT walking. If they * ever change the size of the address "hole" we need to rework * all the page table handling. * * offset: 13 bits * 1st level: 1024 64-bit TTEs in an 8K page for 10 bits * 2nd level: 1024 64-bit pointers in an 8K page for 10 bits * 3rd level: 1024 64-bit pointers in the segmap for 10 bits * ------- * total: 43 bits * * Of course, this means for 32-bit spaces we always have a (practically) * wasted page for the segmap (only one entry used) and half a page wasted * for the page directory. We still have need of one extra bit 8^(. */ #define HOLESHIFT (43) #define PTSZ (PAGE_SIZE/8) #define PDSZ (PTSZ) #define STSZ (PTSZ) #define PTSHIFT (13) #define PDSHIFT (10+PTSHIFT) #define STSHIFT (10+PDSHIFT) #define PTMASK (PTSZ-1) #define PDMASK (PDSZ-1) #define STMASK (STSZ-1) #ifndef _LOCORE #define va_to_seg(v) (int)((((paddr_t)(v))>>STSHIFT)&STMASK) #define va_to_dir(v) (int)((((paddr_t)(v))>>PDSHIFT)&PDMASK) #define va_to_pte(v) (int)((((paddr_t)(v))>>PTSHIFT)&PTMASK) #ifdef _KERNEL /* * Support for big page sizes. This maps the page size to the * page bits. */ struct page_size_map { u_int64_t mask; u_int64_t code; #ifdef DEBUG u_int64_t use; #endif }; extern const struct page_size_map page_size_map[]; struct pmap { struct mutex pm_mtx; int pm_ctx; /* Current context */ int pm_refs; /* ref count */ /* * This contains 64-bit pointers to pages that contain * 1024 64-bit pointers to page tables. All addresses * are physical. * * !!! Only touch this through pseg_get() and pseg_set() !!! */ paddr_t pm_physaddr; /* physical address of pm_segs */ int64_t *pm_segs; struct pmap_statistics pm_stats; }; /* * This comes from the PROM and is used to map prom entries. */ struct prom_map { u_int64_t vstart; u_int64_t vsize; u_int64_t tte; }; #define PMAP_NC 0x001 /* Set the E bit in the page */ #define PMAP_NVC 0x002 /* Don't enable the virtual cache */ #define PMAP_NOCACHE PMAP_NC #define PMAP_LITTLE 0x004 /* Map in little endian mode */ /* Large page size hints -- we really should use another param to pmap_enter() */ #define PMAP_8K 0x000 #define PMAP_64K 0x008 /* Use 64K page */ #define PMAP_512K 0x010 #define PMAP_4M 0x018 #define PMAP_SZ_TO_TTE(x) (((x)&0x018)<<58) /* If these bits are different in va's to the same PA then there is an aliasing in the d$ */ #define VA_ALIAS_ALIGN (1<<14) #define VA_ALIAS_MASK (VA_ALIAS_ALIGN - 1) typedef struct pmap *pmap_t; extern struct pmap kernel_pmap_; #define pmap_kernel() (&kernel_pmap_) /* int pmap_change_wiring(pmap_t pm, vaddr_t va, boolean_t wired); */ #define pmap_resident_count(pm) ((pm)->pm_stats.resident_count) #define pmap_update(pm) /* nothing (yet) */ #define pmap_proc_iflush(p,va,len) /* nothing */ #define pmap_init_percpu() do { /* nothing */ } while (0) void pmap_bootstrap(u_long, u_long, u_int, u_int); int pmap_copyinsn(pmap_t, vaddr_t, uint32_t *); /* make sure all page mappings are modulo 16K to prevent d$ aliasing */ #define PMAP_PREFER /* pmap prefer alignment */ #define PMAP_PREFER_ALIGN() (VA_ALIAS_ALIGN) /* pmap prefer offset in alignment */ #define PMAP_PREFER_OFFSET(of) ((of) & VA_ALIAS_MASK) #define PMAP_CHECK_COPYIN CPU_ISSUN4V #define PMAP_GROWKERNEL /* turn on pmap_growkernel interface */ /* SPARC specific? */ int pmap_dumpsize(void); int pmap_dumpmmu(int (*)(dev_t, daddr_t, caddr_t, size_t), daddr_t); int pmap_pa_exists(paddr_t); /* SPARC64 specific */ int ctx_alloc(struct pmap*); void ctx_free(struct pmap*); #endif /* _KERNEL */ /* * For each struct vm_page, there is a list of all currently valid virtual * mappings of that page. */ typedef struct pv_entry { struct pv_entry *pv_next; /* next pv_entry */ struct pmap *pv_pmap; /* pmap where mapping lies */ vaddr_t pv_va; /* virtual address for mapping */ } *pv_entry_t; /* PV flags encoded in the low bits of the VA of the first pv_entry */ struct vm_page_md { struct mutex pvmtx; struct pv_entry pvent; }; #define VM_MDPAGE_INIT(pg) do { \ mtx_init(&(pg)->mdpage.pvmtx, IPL_VM); \ (pg)->mdpage.pvent.pv_next = NULL; \ (pg)->mdpage.pvent.pv_pmap = NULL; \ (pg)->mdpage.pvent.pv_va = 0; \ } while (0) #endif /* _LOCORE */ #endif /* _MACHINE_PMAP_H_ */
