/*
- * 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@
#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
* 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
* 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
* 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 <rdar://problem/6626493>
+ * 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 */
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 <stdint.h>
#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 */
projects / apple / xnu.git / blobdiff