X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/c0fea4742e91338fffdcf79f86a7c1d5e2b97eb1..6d2010ae8f7a6078e10b361c6962983bab233e0f:/osfmk/mach/vm_param.h diff --git a/osfmk/mach/vm_param.h b/osfmk/mach/vm_param.h index c23cf07f7..468920caa 100644 --- a/osfmk/mach/vm_param.h +++ b/osfmk/mach/vm_param.h @@ -1,23 +1,29 @@ /* - * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved. + * Copyright (c) 2000-2006 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@ @@ -90,6 +96,9 @@ #define atop_64(x) ((uint64_t)(x) >> PAGE_SHIFT) #define ptoa_64(x) ((uint64_t)(x) << PAGE_SHIFT) +#define atop_kernel(x) ((vm_address_t)(x) >> PAGE_SHIFT) +#define ptoa_kernel(x) ((vm_address_t)(x) << PAGE_SHIFT) + /* * While the following block is enabled, the legacy atop and ptoa * macros will behave correctly. If not, they will generate @@ -118,8 +127,8 @@ * address space size) VM types. */ -#define round_page(x) (((vm_offset_t)(x) + PAGE_MASK) & ~((signed)PAGE_MASK)) -#define trunc_page(x) ((vm_offset_t)(x) & ~((signed)PAGE_MASK)) +#define round_page(x) (((vm_offset_t)(x) + PAGE_MASK) & ~((vm_offset_t)PAGE_MASK)) +#define trunc_page(x) ((vm_offset_t)(x) & ~((vm_offset_t)PAGE_MASK)) /* * Round off or truncate to the nearest page. These will work @@ -133,11 +142,10 @@ * associated with the specific VM type should be used. */ -#define round_page_32(x) (((uint32_t)(x) + PAGE_MASK) & ~((signed)PAGE_MASK)) -#define trunc_page_32(x) ((uint32_t)(x) & ~((signed)PAGE_MASK)) -#define round_page_64(x) (((uint64_t)(x) + PAGE_MASK) & ~((signed)PAGE_MASK)) -#define trunc_page_64(x) ((uint64_t)(x) & ~((signed)PAGE_MASK)) - +#define round_page_32(x) (((uint32_t)(x) + PAGE_MASK) & ~((uint32_t)PAGE_MASK)) +#define trunc_page_32(x) ((uint32_t)(x) & ~((uint32_t)PAGE_MASK)) +#define round_page_64(x) (((uint64_t)(x) + PAGE_MASK_64) & ~((uint64_t)PAGE_MASK_64)) +#define trunc_page_64(x) ((uint64_t)(x) & ~((uint64_t)PAGE_MASK_64)) /* * Enable the following block to find uses of xxx_32 macros that should @@ -203,11 +211,26 @@ * an exact page multiple. */ -#define page_aligned(x) ((((vm_object_offset_t) (x)) & PAGE_MASK) == 0) +#define page_aligned(x) (((x) & PAGE_MASK) == 0) extern vm_size_t mem_size; /* 32-bit size of memory - limited by maxmem - deprecated */ extern uint64_t max_mem; /* 64-bit size of memory - limited by maxmem */ +/* + * The default pager does not handle 64-bit offsets inside its objects, + * so this limits the size of anonymous memory objects to 4GB minus 1 page. + * When we need to allocate a chunk of anonymous memory over that size, + * we have to allocate more than one chunk. + */ +#define ANON_MAX_SIZE 0xFFFFF000ULL +/* + * Work-around for + * Break large anonymous memory areas into 128MB chunks to alleviate + * the cost of copying when copy-on-write is not possible because a small + * portion of it being wired. + */ +#define ANON_CHUNK_SIZE (128ULL * 1024 * 1024) /* 128MB */ + #ifdef XNU_KERNEL_PRIVATE extern uint64_t mem_actual; /* 64-bit size of memory - not limited by maxmem */ @@ -224,16 +247,19 @@ extern vm_size_t page_mask; extern int page_shift; /* We need a way to get rid of compiler warnings when we cast from */ -/* a 64 bit value to an address that is 32 bits. */ -/* We know at this point the cast is harmless but sometime in */ -/* the future it may not be. */ -/* When size of an int is no longer equal to size of uintptr_t then */ -/* the compile will fail and we know we need to fix our cast. */ +/* a 64 bit value to an address (which may be 32 bits or 64-bits). */ +/* An intptr_t is used convert the value to the right precision, and */ +/* then to an address. This macro is also used to convert addresses */ +/* to 32-bit integers, which is a hard failure for a 64-bit kernel */ #include #ifndef __CAST_DOWN_CHECK #define __CAST_DOWN_CHECK -typedef char __NEED_TO_CHANGE_CAST_DOWN[ sizeof(uintptr_t) == sizeof(int) ? 0 : -1 ]; -#define CAST_DOWN( type, addr ) ( ((type)((uintptr_t) (addr))) ) + +#define CAST_DOWN( type, addr ) \ + ( ((type)((uintptr_t) (addr)/(sizeof(type) < sizeof(uintptr_t) ? 0 : 1))) ) + +#define CAST_DOWN_EXPLICIT( type, addr ) ( ((type)((uintptr_t) (addr))) ) + #endif /* __CAST_DOWN_CHECK */ #endif /* ASSEMBLER */