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Diffstat (limited to 'sys/arch/sparc64/include/pmap.h')
| -rw-r--r-- | sys/arch/sparc64/include/pmap.h | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/sys/arch/sparc64/include/pmap.h b/sys/arch/sparc64/include/pmap.h new file mode 100644 index 00000000000..1032af946e2 --- /dev/null +++ b/sys/arch/sparc64/include/pmap.h @@ -0,0 +1,188 @@ +/* $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 <machine/pte.h> +#include <sys/queue.h> +#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 __P((pmap_t pmap)); +/* int pmap_change_wiring __P((pmap_t pm, vaddr_t va, boolean_t wired)); */ +#define pmap_resident_count(pm) pmap_count_res((pm)) +#define pmap_from_phys_address(x,f) ((x)>>PGSHIFT) +#define pmap_phys_address(x) ((((paddr_t)(x))<<PGSHIFT)|PMAP_NC) +#define pmap_update() /* nothing (yet) */ + +void pmap_bootstrap __P((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 __P((void)); +int pmap_dumpsize __P((void)); +int pmap_dumpmmu __P((int (*)__P((dev_t, daddr_t, caddr_t, size_t)), + daddr_t)); +int pmap_pa_exists __P((paddr_t)); +struct proc; +void switchexit __P((struct proc *)); + +/* SPARC64 specific */ +int ctx_alloc __P((struct pmap*)); +void ctx_free __P((struct pmap*)); + + +#endif /* _KERNEL */ +#endif /* _LOCORE */ +#endif /* _MACHINE_PMAP_H_ */ |