1 files changed, 71 insertions, 1 deletions

diff --git a/vm/vm_page.h b/vm/vm_page.h
index 205f3d2f..d8d022b4 100644
--- a/vm/vm_page.h
+++ b/vm/vm_page.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010, 2011 Richard Braun.
+ * Copyright (c) 2010, 2011, 2013 Richard Braun.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -13,6 +13,9 @@
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ * Physical page management.
  */
 
 #ifndef _VM_VM_PAGE_H
@@ -35,6 +38,12 @@
 #define vm_page_aligned(addr)   P2ALIGNED(addr, PAGE_SIZE)
 
 /*
+ * True if the vm_page module is completely initialized, false otherwise
+ * (in which case only vm_page_bootalloc() can be used for allocations).
+ */
+extern int vm_page_ready;
+
+/*
  * Physical page descriptor.
  */
 struct vm_page {
@@ -51,4 +60,65 @@ vm_page_to_pa(const struct vm_page *page)
     return page->phys_addr;
 }
 
+/*
+ * Load physical memory into the vm_page module at boot time.
+ *
+ * The avail_start and avail_end parameters are used to maintain a simple
+ * heap for bootstrap allocations.
+ */
+void vm_page_load(const char *name, phys_addr_t start, phys_addr_t end,
+                  phys_addr_t avail_start, phys_addr_t avail_end,
+                  unsigned int seg_index, unsigned int seglist_prio);
+
+/*
+ * Allocate one physical page.
+ *
+ * This function is used to allocate physical memory at boot time, before the
+ * vm_page module is ready, but after the physical memory has been loaded.
+ */
+phys_addr_t vm_page_bootalloc(void);
+
+/*
+ * Set up the vm_page module.
+ *
+ * Once this function returns, the vm_page module is ready, and normal
+ * allocation functions can be used.
+ */
+void vm_page_setup(void);
+
+/*
+ * Make the given page managed by the vm_page module.
+ *
+ * If additional memory can be made usable after the VM system is initialized,
+ * it should be reported through this function.
+ */
+void vm_page_manage(struct vm_page *page);
+
+/*
+ * Return the page descriptor for the given physical address.
+ */
+struct vm_page * vm_page_lookup(phys_addr_t pa);
+
+/*
+ * Allocate a block of 2^order physical pages.
+ */
+struct vm_page * vm_page_alloc(unsigned int order);
+
+/*
+ * Allocate physical pages from a specific segment.
+ *
+ * This function should only be called by architecture specific functions.
+ */
+struct vm_page * vm_page_alloc_seg(unsigned int order, unsigned int seg_index);
+
+/*
+ * Release a block of 2^order physical pages.
+ */
+void vm_page_free(struct vm_page *page, unsigned int order);
+
+/*
+ * Display internal information about the module.
+ */
+void vm_page_info(void);
+
 #endif /* _VM_VM_PAGE_H */