kern/slab: directmap update

The main impact of the direct physical mapping on the kmem module is the
slab size computation. The page allocator requires the allocation size
to be a power-of-two above the page size since it uses the buddy memory
allocation algorithm.

Custom slab allocation functions are no longer needed since the only
user was the kentry area, which has been removed recently.

The KMEM_CACHE_NOCPUPOOL flag is also no longer needed since CPU pools,
which are allocated from a kmem cache, can now always be allocated out
of the direct physical mapping.

7 files changed, 45 insertions, 52 deletions

diff --git a/vm/memory_object_proxy.c b/vm/memory_object_proxy.c
index a64bfcc..6346b5b 100644
--- a/vm/memory_object_proxy.c
+++ b/vm/memory_object_proxy.c
@@ -63,8 +63,10 @@ typedef struct memory_object_proxy *memory_object_proxy_t;
 void
 memory_object_proxy_init (void)
 {
-  kmem_cache_init (&memory_object_proxy_cache, "memory_object_proxy",
-		   sizeof (struct memory_object_proxy), 0, NULL, NULL, NULL, 0);
+  kmem_cache_init (&memory_object_proxy_cache,
+                 "memory_object_proxy",
+                 sizeof(struct memory_object_proxy), 0,
+                 NULL, 0);
 }
   
 /* Lookup a proxy memory object by its port.  */
diff --git a/vm/vm_external.c b/vm/vm_external.c
index 2e2593b..03ebcfb 100644
--- a/vm/vm_external.c
+++ b/vm/vm_external.c
@@ -137,14 +137,18 @@ void		vm_external_module_initialize(void)
 {
 	vm_size_t	size = (vm_size_t) sizeof(struct vm_external);
 
-	kmem_cache_init(&vm_external_cache, "vm_external", size, 0,
-			NULL, NULL, NULL, 0);
-
-	kmem_cache_init(&vm_object_small_existence_map_cache,
-			"small_existence_map", SMALL_SIZE, 0,
-			NULL, NULL, NULL, 0);
-
-	kmem_cache_init(&vm_object_large_existence_map_cache,
-			"large_existence_map", LARGE_SIZE, 0,
-			NULL, NULL, NULL, 0);
+	kmem_cache_init (&vm_external_cache,
+                 "vm_external",
+                 size, 0,
+                 NULL, 0);
+
+	kmem_cache_init (&vm_object_small_existence_map_cache,
+                 "small_existence_map",
+                 SMALL_SIZE, 0,
+                 NULL, 0);
+
+	kmem_cache_init (&vm_object_large_existence_map_cache,
+                 "large_existence_map",
+                 LARGE_SIZE, 0,
+                 NULL, 0);
 }
diff --git a/vm/vm_fault.c b/vm/vm_fault.c
index 1ed9e03..2fe74a4 100644
--- a/vm/vm_fault.c
+++ b/vm/vm_fault.c
@@ -104,8 +104,10 @@ extern struct db_watchpoint *db_watchpoint_list;
  */
 void vm_fault_init(void)
 {
-	kmem_cache_init(&vm_fault_state_cache, "vm_fault_state",
-			sizeof(vm_fault_state_t), 0, NULL, NULL, NULL, 0);
+	kmem_cache_init (&vm_fault_state_cache,
+                 "vm_fault_state",
+                 sizeof(vm_fault_state_t), 0,
+                 NULL, 0);
 }
 
 /*
diff --git a/vm/vm_init.c b/vm/vm_init.c
index 3d1081c..4fdcd83 100644
--- a/vm/vm_init.c
+++ b/vm/vm_init.c
@@ -36,7 +36,6 @@
 
 #include <mach/machine/vm_types.h>
 #include <kern/slab.h>
-#include <kern/kalloc.h>
 #include <vm/vm_fault.h>
 #include <vm/vm_object.h>
 #include <vm/vm_map.h>
@@ -73,7 +72,6 @@ void vm_mem_bootstrap(void)
 	kmem_init(start, end);
 	pmap_init();
 	slab_init();
-	kalloc_init();
 	vm_fault_init();
 	vm_page_module_init();
 	memory_manager_default_init();
diff --git a/vm/vm_map.c b/vm/vm_map.c
index 0c888b6..1b331d6 100644
--- a/vm/vm_map.c
+++ b/vm/vm_map.c
@@ -152,44 +152,27 @@ vm_object_t		vm_submap_object = &vm_submap_object_store;
  *	vm_map_cache:		used to allocate maps.
  *	vm_map_entry_cache:	used to allocate map entries.
  *	vm_map_kentry_cache:	used to allocate map entries for the kernel.
- *
- *	Kernel map entries are allocated from a special cache, using a custom
- *	page allocation function to avoid recursion. It would be difficult
- *	(perhaps impossible) for the kernel to allocate more memory to an entry
- *	cache when it became empty since the very act of allocating memory
- *	implies the creation of a new entry.
  */
 
-vm_offset_t	kentry_data;
-vm_size_t	kentry_data_size = KENTRY_DATA_SIZE;
-
-static vm_offset_t kentry_pagealloc(vm_size_t size)
-{
-	vm_offset_t result;
-
-	if (size > kentry_data_size)
-		panic("vm_map: kentry memory exhausted");
-
-	result = kentry_data;
-	kentry_data += size;
-	kentry_data_size -= size;
-	return result;
-}
-
 void vm_map_init(void)
 {
-	kmem_cache_init(&vm_map_cache, "vm_map", sizeof(struct vm_map), 0,
-			NULL, NULL, NULL, 0);
-	kmem_cache_init(&vm_map_entry_cache, "vm_map_entry",
-			sizeof(struct vm_map_entry), 0, NULL, NULL, NULL, 0);
-#if 0
+	kmem_cache_init (&vm_map_cache,
+                 "vm_map",
+                 sizeof(struct vm_map), 0,
+                 NULL, 0);
+	kmem_cache_init (&vm_map_entry_cache,
+                 "vm_map_entry",
+                 sizeof(struct vm_map_entry), 0,
+                 NULL, 0);
+#if 1
 	kmem_cache_init(&vm_map_kentry_cache, "vm_map_kentry",
-			sizeof(struct vm_map_entry), 0, NULL, kentry_pagealloc,
-			NULL, KMEM_CACHE_NOCPUPOOL | KMEM_CACHE_NOOFFSLAB
-			      | KMEM_CACHE_NORECLAIM);
+			sizeof(struct vm_map_entry), 0,
+			NULL, KMEM_CACHE_NOCPUPOOL | KMEM_CACHE_NOOFFSLAB);
 #endif
-	kmem_cache_init(&vm_map_copy_cache, "vm_map_copy",
-			sizeof(struct vm_map_copy), 0, NULL, NULL, NULL, 0);
+	kmem_cache_init (&vm_map_copy_cache,
+                 "vm_map_copy",
+                 sizeof(struct vm_map_copy), 0,
+                 NULL, 0);
 
 	/*
 	 *	Submap object is initialized by vm_object_init.
diff --git a/vm/vm_object.c b/vm/vm_object.c
index 836f5ef..91d5db8 100644
--- a/vm/vm_object.c
+++ b/vm/vm_object.c
@@ -266,8 +266,10 @@ vm_object_t vm_object_allocate(
  */
 void vm_object_bootstrap(void)
 {
-	kmem_cache_init(&vm_object_cache, "vm_object",
-			sizeof(struct vm_object), 0, NULL, NULL, NULL, 0);
+	kmem_cache_init (&vm_object_cache,
+                 "vm_object",
+                 sizeof(struct vm_object), 0,
+                 NULL, 0);
 
 	queue_init(&vm_object_cached_list);
 	vm_object_cache_lock_init();
diff --git a/vm/vm_resident.c b/vm/vm_resident.c
index 4e1eed5..c9fc8c1 100644
--- a/vm/vm_resident.c
+++ b/vm/vm_resident.c
@@ -429,8 +429,10 @@ void pmap_startup(
  */
 void		vm_page_module_init(void)
 {
-	kmem_cache_init(&vm_page_cache, "vm_page", sizeof(struct vm_page), 0,
-			NULL, NULL, NULL, 0);
+	kmem_cache_init (&vm_page_cache,
+                 "vm_page",
+                 sizeof(struct vm_page), 0,
+                 NULL, 0);
 }
 
 /*