/* $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 #include #include #endif /* * 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 (NBPG/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 /* * 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 struct page_size_map page_size_map[]; /* * Pmap stuff */ #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) struct pmap { 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 simplelock pm_lock; }; /* * 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_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_MASK (1<<14) typedef struct pmap *pmap_t; /* * Encode IO space for pmap_enter() * * Since sun4u machines don't have separate IO spaces, this is a noop. */ #define PMAP_IOENC(io) 0 #ifdef _KERNEL extern struct pmap kernel_pmap_; #define pmap_kernel() (&kernel_pmap_) int pmap_count_res(pmap_t pmap); /* int pmap_change_wiring(pmap_t pm, vaddr_t va, boolean_t wired); */ #define pmap_resident_count(pm) pmap_count_res((pm)) #define pmap_phys_address(x) (x) #define pmap_update(pm) /* nothing (yet) */ #define pmap_proc_iflush(p,va,len) /* nothing */ void pmap_bootstrap(u_long kernelstart, u_long kernelend, u_int numctx); /* make sure all page mappings are modulo 16K to prevent d$ aliasing */ #define PMAP_PREFER(pa, va) (*(va)+=(((*(va))^(pa))&(1<<(PGSHIFT+1)))) #define PMAP_GROWKERNEL /* turn on pmap_growkernel interface */ /* SPARC specific? */ void pmap_redzone(void); int pmap_dumpsize(void); int pmap_dumpmmu(int (*)(dev_t, daddr_t, caddr_t, size_t), daddr_t); int pmap_pa_exists(paddr_t); struct proc; void switchexit(struct proc *); /* SPARC64 specific */ int ctx_alloc(struct pmap*); void ctx_free(struct pmap*); #endif /* _KERNEL */ #endif /* _LOCORE */ #endif /* _MACHINE_PMAP_H_ */