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 fb2ca164fb272e99f6cd0d2d0a8aea9c1c87ff2b..12eb226e2c93843e022e407c0af8c629d292381b 100644 (file)
--- a/osfmk/mach/i386/vm_param.h
+++ b/osfmk/mach/i386/vm_param.h
@@ -111,6 +111,7 @@
 #define i386_btop(x)           ((ppnum_t)((x) >> I386_PGSHIFT))
 #define machine_btop(x)                i386_btop(x)
 #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
@@ -149,7 +150,7 @@
 
 /* process-relative values (all 32-bit legacy only for now) */
 #define VM_MIN_ADDRESS         ((vm_offset_t) 0)
-#define VM_USRSTACK32          ((vm_offset_t) 0xC0000000)
+#define VM_USRSTACK32          ((vm_offset_t) 0xC0000000)      /* ASLR slides stack down by up to 1 MB */
 #define VM_MAX_ADDRESS         ((vm_offset_t) 0xFFE00000)
 
 
@@ -199,6 +200,10 @@
 #define KEXT_ALLOC_BASE(x)  ((x) - KEXT_ALLOC_MAX_OFFSET)
 #define KEXT_ALLOC_SIZE(x)  (KEXT_ALLOC_MAX_OFFSET - (x))
 
+#define VM_KERNEL_IS_KEXT(_o)                                                 \
+                (((vm_offset_t)(_o) >= VM_MIN_KERNEL_AND_KEXT_ADDRESS) &&      \
+                 ((vm_offset_t)(_o) <  VM_MIN_KERNEL_ADDRESS))
+
 #else
 #error unsupported architecture
 #endif
@@ -218,8 +223,24 @@
 #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)
@@ -229,6 +250,9 @@
 
 #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)
@@ -236,6 +260,7 @@
 
 #define NCOPY_WINDOWS 0
 
+
 #else
 #error unsupported architecture
 #endif
@@ -248,34 +273,19 @@
 #define round_i386_to_vm(p)    (atop(round_page(i386_ptob(p))))
 #define vm_to_i386(p)          (i386_btop(ptoa(p)))
 
-#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);             \
-                                                       \
-       if (__pmap == kernel_pmap) {                    \
-               __prot__ |= VM_PROT_WRITE;              \
-       } else {                                        \
-               assert(!__page->encrypted);             \
-       }                                               \
-                                                       \
-       pmap_enter(                                     \
-               __pmap,                                 \
-               (virtual_address),                      \
-               __page->phys_page,                      \
-               __prot__,                               \
-               flags,                                  \
-               (wired)                                 \
-        );                                             \
-       MACRO_END
 
-#define PMAP_ENTER_OPTIONS(pmap, virtual_address, page, protection,    \
-                               flags, wired, options, result)          \
+#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_BATCH_SET_CACHE_ATTR(object, user_page_list, cache_attr, num_pages, batch_pmap_op)\
        MACRO_BEGIN                                                     \
-               result=KERN_SUCCESS;                                    \
-               PMAP_ENTER(pmap, virtual_address, page, protection,     \
-                               flags, wired);                          \
+       (void) user_page_list;                                          \
+       (void) num_pages;                                               \
+       (void) batch_pmap_op;                                           \
        MACRO_END
 
 #define IS_USERADDR64_CANONICAL(addr)                  \