X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/e5568f75972dfc723778653c11cb6b4dc825716a..21362eb3e66fd2c787aee132bce100a44d71a99c:/osfmk/mach/i386/vm_param.h diff --git a/osfmk/mach/i386/vm_param.h b/osfmk/mach/i386/vm_param.h index 822a8c21a..151c6a93b 100644 --- a/osfmk/mach/i386/vm_param.h +++ b/osfmk/mach/i386/vm_param.h @@ -1,23 +1,29 @@ /* - * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved. * - * @APPLE_LICENSE_HEADER_START@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * - * The contents of this file constitute Original Code as defined in and - * are subject to the Apple Public Source License Version 1.1 (the - * "License"). You may not use this file except in compliance with the - * License. Please obtain a copy of the License at - * http://www.apple.com/publicsource and read it before using this file. + * This file contains Original Code and/or Modifications of Original Code + * as defined in and that are subject to the Apple Public Source License + * Version 2.0 (the 'License'). You may not use this file except in + * compliance with the License. The rights granted to you under the License + * may not be used to create, or enable the creation or redistribution of, + * unlawful or unlicensed copies of an Apple operating system, or to + * circumvent, violate, or enable the circumvention or violation of, any + * terms of an Apple operating system software license agreement. * - * This Original Code and all software distributed under the License are - * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER + * Please obtain a copy of the License at + * http://www.opensource.apple.com/apsl/ and read it before using this file. + * + * The Original Code and all software distributed under the License are + * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the - * License for the specific language governing rights and limitations - * under the License. + * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. + * Please see the License for the specific language governing rights and + * limitations under the License. * - * @APPLE_LICENSE_HEADER_END@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* * @OSF_COPYRIGHT@ @@ -84,19 +90,23 @@ #ifndef _MACH_I386_VM_PARAM_H_ #define _MACH_I386_VM_PARAM_H_ -#define BYTE_SIZE 8 /* byte size in bits */ +#define BYTE_SIZE 8 /* byte size in bits */ #define I386_PGBYTES 4096 /* bytes per 80386 page */ -#define I386_PGSHIFT 12 /* number of bits to shift for pages */ +#define I386_PGSHIFT 12 /* number of bits to shift for pages */ + +#define PAGE_SIZE I386_PGBYTES +#define PAGE_SHIFT I386_PGSHIFT +#define PAGE_MASK (PAGE_SIZE - 1) /* * Convert bytes to pages and convert pages to bytes. * No rounding is used. */ -#define i386_btop(x) (((unsigned)(x)) >> I386_PGSHIFT) +#define i386_btop(x) (((pmap_paddr_t)(x)) >> I386_PGSHIFT) #define machine_btop(x) i386_btop(x) -#define i386_ptob(x) (((unsigned)(x)) << I386_PGSHIFT) +#define i386_ptob(x) (((pmap_paddr_t)(x)) << I386_PGSHIFT) /* * Round off or truncate to the nearest page. These will work @@ -104,26 +114,41 @@ * bytes. */ -#define i386_round_page(x) ((((unsigned)(x)) + I386_PGBYTES - 1) & \ +#define i386_round_page(x) ((((pmap_paddr_t)(x)) + I386_PGBYTES - 1) & \ ~(I386_PGBYTES-1)) -#define i386_trunc_page(x) (((unsigned)(x)) & ~(I386_PGBYTES-1)) +#define i386_trunc_page(x) (((pmap_paddr_t)(x)) & ~(I386_PGBYTES-1)) #define VM_MAX_PAGE_ADDRESS 0x00000000C0000000ULL +/* system-wide values */ +#define MACH_VM_MIN_ADDRESS ((mach_vm_offset_t) 0) +#define MACH_VM_MAX_ADDRESS ((mach_vm_offset_t) VM_MAX_PAGE_ADDRESS) + +/* process-relative values (all 32-bit legacy only for now) */ #define VM_MIN_ADDRESS ((vm_offset_t) 0) #define VM_MAX_ADDRESS ((vm_offset_t) (VM_MAX_PAGE_ADDRESS & 0xFFFFFFFF)) -#define LINEAR_KERNEL_ADDRESS ((vm_offset_t) 0xc0000000) - -#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t) 0x00000000U) -#define VM_MAX_KERNEL_ADDRESS ((vm_offset_t) 0x3fffffffU) +#ifdef KERNEL_PRIVATE -#define VM_MIN_KERNEL_LOADED_ADDRESS ((vm_offset_t) 0x0c000000U) -#define VM_MAX_KERNEL_LOADED_ADDRESS ((vm_offset_t) 0x1fffffffU) +/* Kernel-wide values */ +#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t) 0xC0000000U) +#define VM_MAX_KERNEL_ADDRESS ((vm_offset_t) 0xFfffffffU) +#define KERNEL_STACK_SIZE (I386_PGBYTES*4) /* FIXME - always leave like this? */ #define INTSTACK_SIZE (I386_PGBYTES*4) -#define KERNEL_STACK_SIZE (I386_PGBYTES*4) + +#ifdef MACH_KERNEL_PRIVATE + +/* For implementing legacy 32-bit interfaces */ +#define VM32_SUPPORT +#define VM32_MIN_ADDRESS ((vm32_offset_t) 0) +#define VM32_MAX_ADDRESS ((vm32_offset_t) (VM_MAX_PAGE_ADDRESS & 0xFFFFFFFF)) + +#define LINEAR_KERNEL_ADDRESS ((vm_offset_t) 0xc0000000) + +#define VM_MIN_KERNEL_LOADED_ADDRESS ((vm_offset_t) 0x0c000000U) +#define VM_MAX_KERNEL_LOADED_ADDRESS ((vm_offset_t) 0x1fffffffU) /* * Conversion between 80386 pages and VM pages @@ -133,55 +158,31 @@ #define round_i386_to_vm(p) (atop(round_page(i386_ptob(p)))) #define vm_to_i386(p) (i386_btop(ptoa(p))) -/* - * Physical memory is mapped 1-1 with virtual memory starting - * at VM_MIN_KERNEL_ADDRESS. - */ -#define phystokv(a) ((vm_offset_t)(a) + VM_MIN_KERNEL_ADDRESS) - -/* - * For 386 only, ensure that pages are installed in the - * kernel_pmap with VM_PROT_WRITE enabled. This avoids - * code in pmap_enter that disallows a read-only mapping - * in the kernel's pmap. (See ri-osc CR1387.) - * - * An entry in kernel_pmap is made only by the kernel or - * a collocated server -- by definition (;-)), the requester - * is trusted code. If it asked for read-only access, - * it won't attempt a write. We don't have to enforce the - * restriction. (Naturally, this assumes that any collocated - * server will _not_ depend on trapping write accesses to pages - * mapped read-only; this cannot be made to work in the current - * i386-inspired pmap model.) - */ - -/*#if defined(AT386) - -#define PMAP_ENTER_386_CHECK \ - if (cpuid_family == CPUID_FAMILY_386) - -#else -- FIXME? We're only running on Pentiums or better */ - -#define PMAP_ENTER_386_CHECK - -/*#endif*/ - #define PMAP_ENTER(pmap, virtual_address, page, protection, flags, wired) \ MACRO_BEGIN \ + pmap_t __pmap = (pmap); \ + vm_page_t __page = (page); \ vm_prot_t __prot__ = \ (protection) & ~(page)->page_lock; \ \ - PMAP_ENTER_386_CHECK \ - if ((pmap) == kernel_pmap) \ + if (__pmap == kernel_pmap) { \ __prot__ |= VM_PROT_WRITE; \ + } else { \ + assert(!__page->encrypted); \ + } \ + \ pmap_enter( \ - (pmap), \ + __pmap, \ (virtual_address), \ - (page)->phys_page, \ + __page->phys_page, \ __prot__, \ flags, \ (wired) \ ); \ MACRO_END +#endif /* MACH_KERNEL_PRIVATE */ + +#endif /* KERNEL_PRIVATE */ + #endif /* _MACH_I386_VM_PARAM_H_ */