Annotation of sys/arch/sparc64/include/pmap.h, Revision 1.1
1.1 ! nbrk 1: /* $NetBSD: pmap.h,v 1.16 2001/04/22 23:19:30 thorpej Exp $ */
! 2:
! 3: /*-
! 4: * Copyright (C) 1995, 1996 Wolfgang Solfrank.
! 5: * Copyright (C) 1995, 1996 TooLs GmbH.
! 6: * All rights reserved.
! 7: *
! 8: * Redistribution and use in source and binary forms, with or without
! 9: * modification, are permitted provided that the following conditions
! 10: * are met:
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. Redistributions in binary form must reproduce the above copyright
! 14: * notice, this list of conditions and the following disclaimer in the
! 15: * documentation and/or other materials provided with the distribution.
! 16: * 3. All advertising materials mentioning features or use of this software
! 17: * must display the following acknowledgement:
! 18: * This product includes software developed by TooLs GmbH.
! 19: * 4. The name of TooLs GmbH may not be used to endorse or promote products
! 20: * derived from this software without specific prior written permission.
! 21: *
! 22: * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
! 23: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
! 24: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
! 25: * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
! 26: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
! 27: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
! 28: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
! 29: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
! 30: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
! 31: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
! 32: */
! 33:
! 34: #ifndef _MACHINE_PMAP_H_
! 35: #define _MACHINE_PMAP_H_
! 36:
! 37: #ifndef _LOCORE
! 38: #include <machine/pte.h>
! 39: #include <sys/queue.h>
! 40: #endif
! 41:
! 42: /*
! 43: * This scheme uses 2-level page tables.
! 44: *
! 45: * While we're still in 32-bit mode we do the following:
! 46: *
! 47: * offset: 13 bits
! 48: * 1st level: 1024 64-bit TTEs in an 8K page for 10 bits
! 49: * 2nd level: 512 32-bit pointers in the pmap for 9 bits
! 50: * -------
! 51: * total: 32 bits
! 52: *
! 53: * In 64-bit mode the Spitfire and Blackbird CPUs support only
! 54: * 44-bit virtual addresses. All addresses between
! 55: * 0x0000 07ff ffff ffff and 0xffff f800 0000 0000 are in the
! 56: * "VA hole" and trap, so we don't have to track them. However,
! 57: * we do need to keep them in mind during PT walking. If they
! 58: * ever change the size of the address "hole" we need to rework
! 59: * all the page table handling.
! 60: *
! 61: * offset: 13 bits
! 62: * 1st level: 1024 64-bit TTEs in an 8K page for 10 bits
! 63: * 2nd level: 1024 64-bit pointers in an 8K page for 10 bits
! 64: * 3rd level: 1024 64-bit pointers in the segmap for 10 bits
! 65: * -------
! 66: * total: 43 bits
! 67: *
! 68: * Of course, this means for 32-bit spaces we always have a (practically)
! 69: * wasted page for the segmap (only one entry used) and half a page wasted
! 70: * for the page directory. We still have need of one extra bit 8^(.
! 71: */
! 72:
! 73: #define HOLESHIFT (43)
! 74:
! 75: #define PTSZ (NBPG/8)
! 76: #define PDSZ (PTSZ)
! 77: #define STSZ (PTSZ)
! 78:
! 79: #define PTSHIFT (13)
! 80: #define PDSHIFT (10+PTSHIFT)
! 81: #define STSHIFT (10+PDSHIFT)
! 82:
! 83: #define PTMASK (PTSZ-1)
! 84: #define PDMASK (PDSZ-1)
! 85: #define STMASK (STSZ-1)
! 86:
! 87: #ifndef _LOCORE
! 88:
! 89: /*
! 90: * Support for big page sizes. This maps the page size to the
! 91: * page bits.
! 92: */
! 93: struct page_size_map {
! 94: u_int64_t mask;
! 95: u_int64_t code;
! 96: #ifdef DEBUG
! 97: u_int64_t use;
! 98: #endif
! 99: };
! 100: extern struct page_size_map page_size_map[];
! 101:
! 102: /*
! 103: * Pmap stuff
! 104: */
! 105:
! 106: #define va_to_seg(v) (int)((((paddr_t)(v))>>STSHIFT)&STMASK)
! 107: #define va_to_dir(v) (int)((((paddr_t)(v))>>PDSHIFT)&PDMASK)
! 108: #define va_to_pte(v) (int)((((paddr_t)(v))>>PTSHIFT)&PTMASK)
! 109:
! 110: struct pmap {
! 111: int pm_ctx; /* Current context */
! 112: int pm_refs; /* ref count */
! 113: /*
! 114: * This contains 64-bit pointers to pages that contain
! 115: * 1024 64-bit pointers to page tables. All addresses
! 116: * are physical.
! 117: *
! 118: * !!! Only touch this through pseg_get() and pseg_set() !!!
! 119: */
! 120: paddr_t pm_physaddr; /* physical address of pm_segs */
! 121: int64_t *pm_segs;
! 122: struct simplelock pm_lock;
! 123: };
! 124:
! 125: /*
! 126: * This comes from the PROM and is used to map prom entries.
! 127: */
! 128: struct prom_map {
! 129: u_int64_t vstart;
! 130: u_int64_t vsize;
! 131: u_int64_t tte;
! 132: };
! 133:
! 134: #define PMAP_NC 0x001 /* Set the E bit in the page */
! 135: #define PMAP_NVC 0x002 /* Don't enable the virtual cache */
! 136: #define PMAP_LITTLE 0x004 /* Map in little endian mode */
! 137: /* Large page size hints -- we really should use another param to pmap_enter() */
! 138: #define PMAP_8K 0x000
! 139: #define PMAP_64K 0x008 /* Use 64K page */
! 140: #define PMAP_512K 0x010
! 141: #define PMAP_4M 0x018
! 142: #define PMAP_SZ_TO_TTE(x) (((x)&0x018)<<58)
! 143: /* If these bits are different in va's to the same PA then there is an aliasing in the d$ */
! 144: #define VA_ALIAS_MASK (1<<13)
! 145:
! 146: typedef struct pmap *pmap_t;
! 147:
! 148: /*
! 149: * Encode IO space for pmap_enter()
! 150: *
! 151: * Since sun4u machines don't have separate IO spaces, this is a noop.
! 152: */
! 153: #define PMAP_IOENC(io) 0
! 154:
! 155: #ifdef _KERNEL
! 156: extern struct pmap kernel_pmap_;
! 157: #define pmap_kernel() (&kernel_pmap_)
! 158:
! 159: int pmap_count_res(pmap_t pmap);
! 160: /* int pmap_change_wiring(pmap_t pm, vaddr_t va, boolean_t wired); */
! 161: #define pmap_resident_count(pm) pmap_count_res((pm))
! 162: #define pmap_phys_address(x) (x)
! 163: #define pmap_update(pm) /* nothing (yet) */
! 164:
! 165: #define pmap_proc_iflush(p,va,len) /* nothing */
! 166:
! 167: void pmap_bootstrap(u_long kernelstart, u_long kernelend, u_int numctx);
! 168: /* make sure all page mappings are modulo 16K to prevent d$ aliasing */
! 169: #define PMAP_PREFER(pa, va) (*(va) += (((*(va)) ^ (pa)) & VA_ALIAS_MASK))
! 170:
! 171: #define PMAP_GROWKERNEL /* turn on pmap_growkernel interface */
! 172:
! 173: /* SPARC specific? */
! 174: void pmap_redzone(void);
! 175: int pmap_dumpsize(void);
! 176: int pmap_dumpmmu(int (*)(dev_t, daddr64_t, caddr_t, size_t), daddr64_t);
! 177: int pmap_pa_exists(paddr_t);
! 178: struct proc;
! 179: void switchexit(struct proc *);
! 180:
! 181: /* SPARC64 specific */
! 182: int ctx_alloc(struct pmap*);
! 183: void ctx_free(struct pmap*);
! 184:
! 185:
! 186: #endif /* _KERNEL */
! 187: #endif /* _LOCORE */
! 188: #endif /* _MACHINE_PMAP_H_ */
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