xnu-2050.48.11.tar.gz

[apple/xnu.git] / osfmk / mach / i386 / vm_param.h

diff --git a/osfmk/mach/i386/vm_param.h b/osfmk/mach/i386/vm_param.h
index f5b0c053669a6f2d54bca7e020e12c7beb2b9174..12eb226e2c93843e022e407c0af8c629d292381b 100644 (file)
--- 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) 2000-2006 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,
  * 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@
  */
 /*
  * @OSF_COPYRIGHT@


@@ -84,19 +90,28 @@
 #ifndef        _MACH_I386_VM_PARAM_H_
 #define _MACH_I386_VM_PARAM_H_
 
 #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              /* bitshift for pages */

 
 

-#define I386_PGBYTES   4096    /* bytes per 80386 page */
-#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)
+
+#define I386_LPGBYTES          2*1024*1024     /* bytes per large page */
+#define I386_LPGSHIFT          21              /* bitshift for large pages */
+#define I386_LPGMASK           (I386_LPGBYTES-1)

 
 /*
  *     Convert bytes to pages and convert pages to bytes.
  *     No rounding is used.
  */
 
 
 /*
  *     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)           ((ppnum_t)((x) >> I386_PGSHIFT))

 #define machine_btop(x)                i386_btop(x)
 #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)
+#define machine_ptob(x)                i386_ptob(x)

 
 /*
  *     Round off or truncate to the nearest page.  These will work
 
 /*
  *     Round off or truncate to the nearest page.  These will work


@@ -104,48 +119,151 @@
  *     bytes.
  */
 
  *     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))
                                        ~(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_MIN_ADDRESS64       ((user_addr_t) 0x0000000000000000ULL)
+/*
+ * default top of user stack... it grows down from here
+ */
+#define VM_USRSTACK64          ((user_addr_t) 0x00007FFF5FC00000ULL)
+#define VM_DYLD64              ((user_addr_t) 0x00007FFF5FC00000ULL)
+#define VM_LIB64_SHR_DATA      ((user_addr_t) 0x00007FFF60000000ULL)
+#define VM_LIB64_SHR_TEXT      ((user_addr_t) 0x00007FFF80000000ULL)
+/*
+ * the end of the usable user address space , for now about 47 bits.
+ * the 64 bit commpage is past the end of this
+ */
+#define VM_MAX_PAGE_ADDRESS    ((user_addr_t) 0x00007FFFFFE00000ULL)
+/*
+ * canonical end of user address space for limits checking
+ */
+#define VM_MAX_USER_PAGE_ADDRESS ((user_addr_t)0x00007FFFFFFFF000ULL)
+
+
+/* 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_MIN_ADDRESS         ((vm_offset_t) 0)

-#define VM_MAX_ADDRESS         ((vm_offset_t) 0xc0000000U)
+#define VM_USRSTACK32          ((vm_offset_t) 0xC0000000)      /* ASLR slides stack down by up to 1 MB */
+#define VM_MAX_ADDRESS         ((vm_offset_t) 0xFFE00000)
+
+
+#ifdef KERNEL_PRIVATE 
+
+/* Kernel-wide values */
+
+#define KB             (1024ULL)               
+#define MB             (1024*KB)
+#define GB             (1024*MB)
+
+/*
+ * Maximum physical memory supported.
+ */
+#define        K32_MAXMEM      (32*GB)
+#define        K64_MAXMEM      (96*GB)
+#if defined(__i386__)
+#define KERNEL_MAXMEM  K32_MAXMEM
+#else
+#define KERNEL_MAXMEM  K64_MAXMEM
+#endif
+
+/*
+ * XXX
+ * The kernel max VM address is limited to 0xFF3FFFFF for now because
+ * some data structures are explicitly allocated at 0xFF400000 without
+ * VM's knowledge (see osfmk/i386/locore.s for the allocation of PTmap and co.).
+ * We can't let VM allocate memory from there.
+ */
+
+#if defined(__i386__)
+
+#define KERNEL_IMAGE_TO_PHYS(x) (x)
+#define VM_MIN_KERNEL_ADDRESS          ((vm_offset_t) 0x00001000U)
+#define VM_MIN_KERNEL_AND_KEXT_ADDRESS VM_MIN_KERNEL_ADDRESS
+#define VM_MAX_KERNEL_ADDRESS          ((vm_offset_t) 0xFE7FFFFFU)
+
+#elif defined(__x86_64__)
+
+#define KERNEL_IMAGE_TO_PHYS(x) (x)
+#define VM_MIN_KERNEL_ADDRESS          ((vm_offset_t) 0xFFFFFF8000000000UL)
+#define VM_MIN_KERNEL_PAGE             ((ppnum_t)0)
+#define VM_MIN_KERNEL_AND_KEXT_ADDRESS (VM_MIN_KERNEL_ADDRESS - 0x80000000ULL)
+#define VM_MAX_KERNEL_ADDRESS          ((vm_offset_t) 0xFFFFFFFFFFFFEFFFUL)
+#define VM_MAX_KERNEL_ADDRESS_EFI32    ((vm_offset_t) 0xFFFFFF80FFFFEFFFUL)
+#define KEXT_ALLOC_MAX_OFFSET (2 * 1024 * 1024 * 1024UL)
+#define KEXT_ALLOC_BASE(x)  ((x) - KEXT_ALLOC_MAX_OFFSET)
+#define KEXT_ALLOC_SIZE(x)  (KEXT_ALLOC_MAX_OFFSET - (x))

 
 

-#define LINEAR_KERNEL_ADDRESS  ((vm_offset_t) 0xc0000000)
+#define VM_KERNEL_IS_KEXT(_o)                                                 \
+                (((vm_offset_t)(_o) >= VM_MIN_KERNEL_AND_KEXT_ADDRESS) &&      \
+                 ((vm_offset_t)(_o) <  VM_MIN_KERNEL_ADDRESS))

 
 

-#define VM_MIN_KERNEL_ADDRESS  ((vm_offset_t) 0x00000000U)
-#define VM_MAX_KERNEL_ADDRESS  ((vm_offset_t) 0x3fffffffU)
+#else
+#error unsupported architecture
+#endif

 
 

-#define VM_MIN_KERNEL_LOADED_ADDRESS   ((vm_offset_t) 0x0c000000U)
-#define VM_MAX_KERNEL_LOADED_ADDRESS   ((vm_offset_t) 0x1fffffffU)
+#define KERNEL_STACK_SIZE      (I386_PGBYTES*4)
+
+#define VM_MAP_MIN_ADDRESS     MACH_VM_MIN_ADDRESS
+#define VM_MAP_MAX_ADDRESS     MACH_VM_MAX_ADDRESS

 
 /* FIXME  - always leave like this? */
 #define        INTSTACK_SIZE   (I386_PGBYTES*4)
 
 /* FIXME  - always leave like this? */
 #define        INTSTACK_SIZE   (I386_PGBYTES*4)

-#define        KERNEL_STACK_SIZE       (I386_PGBYTES*4)

 
 

-#if 0          /* FIXME */
+#ifdef MACH_KERNEL_PRIVATE

 
 

-#include <norma_vm.h>
-#include <task_swapper.h>
-#include <thread_swapper.h>
+/* For implementing legacy 32-bit interfaces */
+#define VM32_SUPPORT                   1
+#define VM32_MIN_ADDRESS               ((vm32_offset_t) 0)
+#define VM32_MAX_ADDRESS               ((vm32_offset_t) (VM_MAX_PAGE_ADDRESS & 0xFFFFFFFF))
+
+/*
+ * kalloc() parameters:
+ *
+ * Historically kalloc's underlying zones were power-of-2 sizes, with a
+ * KALLOC_MINSIZE of 16 bytes.  The allocator ensured that
+ * (sizeof == alignof) >= 16 for all kalloc allocations.
+ *
+ * Today kalloc may use zones with intermediate sizes, constrained by
+ * KALLOC_MINSIZE and a minimum alignment, expressed by KALLOC_LOG2_MINALIGN.
+ *
+ * The common alignment for LP64 is for longs and pointers i.e. 8 bytes.
+ */
+
+#if defined(__i386__)
+
+#define        KALLOC_MINSIZE          16      /* minimum allocation size */
+#define        KALLOC_LOG2_MINALIGN    4       /* log2 minimum alignment */
+
+#define LINEAR_KERNEL_ADDRESS  ((vm_offset_t) 0x00000000)
+
+#define VM_MIN_KERNEL_LOADED_ADDRESS   ((vm_offset_t) 0x00000000U)
+#define VM_MAX_KERNEL_LOADED_ADDRESS   ((vm_offset_t) 0x1FFFFFFFU)
+
+#define NCOPY_WINDOWS 4
+
+#elif defined(__x86_64__)
+
+#define        KALLOC_MINSIZE          16      /* minimum allocation size */
+#define        KALLOC_LOG2_MINALIGN    4       /* log2 minimum alignment */
+
+#define LINEAR_KERNEL_ADDRESS  ((vm_offset_t) 0x00000000)
+
+#define VM_MIN_KERNEL_LOADED_ADDRESS   ((vm_offset_t) 0xFFFFFF8000000000UL)
+#define VM_MAX_KERNEL_LOADED_ADDRESS   ((vm_offset_t) 0xFFFFFF801FFFFFFFUL)
+
+#define NCOPY_WINDOWS 0

 
 

-#if defined(AT386)
-#include <i386/cpuid.h>
-#endif

 
 

-#if !NORMA_VM 
-#if !TASK_SWAPPER && !THREAD_SWAPPER
-#define KERNEL_STACK_SIZE      (I386_PGBYTES/2)

 #else
 #else

-/* stack needs to be a multiple of page size to get unwired  when swapped */
-#define KERNEL_STACK_SIZE      (I386_PGBYTES)
-#endif /* TASK || THREAD SWAPPER */
-#define INTSTACK_SIZE          (I386_PGBYTES)  /* interrupt stack size */
-#else  /* NORMA_VM */
-#define KERNEL_STACK_SIZE      (I386_PGBYTES*2)
-#define INTSTACK_SIZE          (I386_PGBYTES*2)        /* interrupt stack size */
-#endif /* NORMA_VM */
-#endif /* MACH_KERNEL */
+#error unsupported architecture
+#endif

 
 /*
  *     Conversion between 80386 pages and VM pages
 
 /*
  *     Conversion between 80386 pages and VM pages


@@ -155,54 +273,26 @@
 #define round_i386_to_vm(p)    (atop(round_page(i386_ptob(p))))
 #define vm_to_i386(p)          (i386_btop(ptoa(p)))
 
 #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_SET_CACHE_ATTR(mem, object, cache_attr, batch_pmap_op)    \
+       MACRO_BEGIN                                                     \
+               pmap_set_cache_attributes((mem)->phys_page, (cache_attr));      \
+               (object)->set_cache_attr = TRUE;                                \
+               (void) batch_pmap_op;                                   \
+       MACRO_END                                                       

 
 

-#define PMAP_ENTER_386_CHECK \
-       if (cpuid_family == CPUID_FAMILY_386)
-
-#else -- FIXME? We're only running on Pentiums or better */
+#define PMAP_BATCH_SET_CACHE_ATTR(object, user_page_list, cache_attr, num_pages, batch_pmap_op)\
+       MACRO_BEGIN                                                     \
+       (void) user_page_list;                                          \
+       (void) num_pages;                                               \
+       (void) batch_pmap_op;                                           \
+       MACRO_END

 
 

-#define PMAP_ENTER_386_CHECK
+#define IS_USERADDR64_CANONICAL(addr)                  \
+       ((addr) < (VM_MAX_USER_PAGE_ADDRESS + PAGE_SIZE))

 
 

-/*#endif*/
+#endif /* MACH_KERNEL_PRIVATE */

 
 

-#define PMAP_ENTER(pmap, virtual_address, page, protection, wired) \
-       MACRO_BEGIN                                     \
-       vm_prot_t __prot__ =                            \
-               (protection) & ~(page)->page_lock;      \
-                                                       \
-       PMAP_ENTER_386_CHECK                            \
-       if ((pmap) == kernel_pmap)                      \
-               __prot__ |= VM_PROT_WRITE;              \
-       pmap_enter(                                     \
-               (pmap),                                 \
-               (virtual_address),                      \
-               (page)->phys_addr,                      \
-               __prot__,                               \
-               (wired)                                 \
-        );                                             \
-       MACRO_END
+#endif /* KERNEL_PRIVATE */

 
 #endif /* _MACH_I386_VM_PARAM_H_ */
 
 #endif /* _MACH_I386_VM_PARAM_H_ */