/* $NetBSD: pte.h,v 1.36 2022/08/21 09:12:43 riastradh Exp $ */ /* * Copyright (c) 2001 Wasabi Systems, Inc. * All rights reserved. * * Written by Frank van der Linden for Wasabi Systems, Inc. * * 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 for the NetBSD Project by * Wasabi Systems, Inc. * 4. The name of Wasabi Systems, Inc. may not be used to endorse * or promote products derived from this software without specific prior * written permission. * * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC * 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. */ /* * Copyright (c) 1997 Charles D. Cranor and Washington University. * 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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 _I386_PTE_H_ #define _I386_PTE_H_ #ifdef _KERNEL_OPT #include "opt_xen.h" #endif /* * The PAE extension extends the size of the PTE to 64 bits (52bits physical * address) and is compatible with the amd64 PTE format. The first level * maps 2M, the second 1G, so a third level page table is introduced to * map the 4GB virtual address space. This PD has only 4 entries. * We can't use recursive mapping at level 3 to map the PD pages, as this * would eat one GB of address space. In addition, Xen imposes restrictions * on the entries we put in the L3 page (for example, the page pointed to by * the last slot can't be shared among different L3 pages), which makes * handling this L3 page in the same way we do for L2 on i386 (or L4 on amd64) * difficult. For most things we'll just pretend to have only 2 levels, * with the 2 high bits of the L2 index being in fact the index in the * L3. */ #if !defined(_LOCORE) /* * here we define the data types for PDEs and PTEs */ #include <sys/stdint.h> #ifdef PAE typedef uint64_t pd_entry_t; /* PDE */ typedef uint64_t pt_entry_t; /* PTE */ #else typedef uint32_t pd_entry_t; /* PDE */ typedef uint32_t pt_entry_t; /* PTE */ #endif #endif /* * Mask to get rid of the sign-extended part of addresses. */ #define VA_SIGN_MASK 0 #define VA_SIGN_NEG(va) ((va) | VA_SIGN_MASK) /* * XXXfvdl this one's not right. */ #define VA_SIGN_POS(va) ((va) & ~VA_SIGN_MASK) #ifdef PAE #define L1_SHIFT 12 #define L2_SHIFT 21 #define L3_SHIFT 30 #define NBPD_L1 (1ULL << L1_SHIFT) /* # bytes mapped by L1 ent (4K) */ #define NBPD_L2 (1ULL << L2_SHIFT) /* # bytes mapped by L2 ent (2MB) */ #define NBPD_L3 (1ULL << L3_SHIFT) /* # bytes mapped by L3 ent (1GB) */ #define L3_MASK 0xc0000000 #define L2_REALMASK 0x3fe00000 #define L2_MASK (L2_REALMASK | L3_MASK) #define L1_MASK 0x001ff000 #define L3_FRAME (L3_MASK) #define L2_FRAME (L3_FRAME | L2_MASK) #define L1_FRAME (L2_FRAME|L1_MASK) #define PTE_4KFRAME 0x000ffffffffff000ULL #define PTE_2MFRAME 0x000fffffffe00000ULL #define PTE_FRAME PTE_4KFRAME #define PTE_LGFRAME PTE_2MFRAME /* macros to get real L2 and L3 index, from our "extended" L2 index */ #define l2tol3(idx) ((idx) >> (L3_SHIFT - L2_SHIFT)) #define l2tol2(idx) ((idx) & (L2_REALMASK >> L2_SHIFT)) #else /* PAE */ #define L1_SHIFT 12 #define L2_SHIFT 22 #define NBPD_L1 (1UL << L1_SHIFT) /* # bytes mapped by L1 ent (4K) */ #define NBPD_L2 (1UL << L2_SHIFT) /* # bytes mapped by L2 ent (4MB) */ #define L2_MASK 0xffc00000 #define L1_MASK 0x003ff000 #define L2_FRAME (L2_MASK) #define L1_FRAME (L2_FRAME|L1_MASK) #define PTE_4KFRAME 0xfffff000 #define PTE_4MFRAME 0xffc00000 #define PTE_FRAME PTE_4KFRAME #define PTE_LGFRAME PTE_4MFRAME #endif /* PAE */ /* * x86 PTE/PDE bits. */ #define PTE_P 0x00000001 /* Present */ #define PTE_W 0x00000002 /* Write */ #define PTE_U 0x00000004 /* User */ #define PTE_PWT 0x00000008 /* Write-Through */ #define PTE_PCD 0x00000010 /* Cache-Disable */ #define PTE_A 0x00000020 /* Accessed */ #define PTE_D 0x00000040 /* Dirty */ #define PTE_PAT 0x00000080 /* PAT on 4KB Pages */ #define PTE_PS 0x00000080 /* Large Page Size */ #define PTE_G 0x00000100 /* Global Translation */ #define PTE_AVL1 0x00000200 /* Ignored by Hardware */ #define PTE_AVL2 0x00000400 /* Ignored by Hardware */ #define PTE_AVL3 0x00000800 /* Ignored by Hardware */ #define PTE_LGPAT 0x00001000 /* PAT on Large Pages */ #ifdef PAE #define PTE_NX 0x8000000000000000ULL /* No Execute */ #else #define PTE_NX 0 /* Dummy */ #endif #define _MACHINE_PTE_H_X86 #include <x86/pte.h> #undef _MACHINE_PTE_H_X86 #endif /* _I386_PTE_H_ */
