+++ /dev/null
-/*
- * Physical memory allocation
- * Copyright (c) 2001,2003,2004 David H. Hovemeyer <daveho@cs.umd.edu>
- * Copyright (c) 2003, Jeffrey K. Hollingsworth <hollings@cs.umd.edu>
- * $Revision: 1.1 $
- *
- * This is free software. You are permitted to use,
- * redistribute, and modify it as specified in the file "COPYING".
- */
-
-#ifndef GEEKOS_MEM_H
-#define GEEKOS_MEM_H
-
-#include <geekos/ktypes.h>
-#include <geekos/defs.h>
-#include <geekos/list.h>
-#include <geekos/paging.h>
-
-struct Boot_Info;
-
-/*
- * Page flags
- */
-#define PAGE_AVAIL 0x0000 /* page is on the freelist */
-#define PAGE_KERN 0x0001 /* page used by kernel code or data */
-#define PAGE_HW 0x0002 /* page used by hardware (e.g., ISA hole) */
-#define PAGE_ALLOCATED 0x0004 /* page is allocated */
-#define PAGE_UNUSED 0x0008 /* page is unused */
-#define PAGE_HEAP 0x0010 /* page is in kernel heap */
-#define PAGE_PAGEABLE 0x0020 /* page can be paged out */
-#define PAGE_LOCKED 0x0040 /* page is taken should not be freed */
-#define PAGE_VM 0x0080 /* page is used by the VM */
-
-
-struct Page;
-
-/*
- * List datatype for doubly-linked list of Pages.
- */
-DEFINE_LIST(Page_List, Page);
-
-/*
- * Each page of physical memory has one of these structures
- * associated with it, to do allocation and bookkeeping.
- */
-struct Page {
- unsigned flags; /* Flags indicating state of page */
- DEFINE_LINK(Page_List, Page); /* Link fields for Page_List */
- int clock;
- ulong_t vaddr; /* User virtual address where page is mapped */
- pte_t *entry; /* Page table entry referring to the page */
-};
-
-IMPLEMENT_LIST(Page_List, Page);
-
-void Init_Mem(struct Boot_Info* bootInfo);
-void Init_BSS(void);
-void* Alloc_Page(void);
-void* Alloc_Pageable_Page(pte_t *entry, ulong_t vaddr);
-void Free_Page(void* pageAddr);
-
-/*
- * Determine if given address is a multiple of the page size.
- */
-static __inline__ bool Is_Page_Multiple(ulong_t addr)
-{
- return addr == (addr & ~(PAGE_MASK));
-}
-
-/*
- * Round given address up to a multiple of the page size
- */
-static __inline__ ulong_t Round_Up_To_Page(ulong_t addr)
-{
- if ((addr & PAGE_MASK) != 0) {
- addr &= ~(PAGE_MASK);
- addr += PAGE_SIZE;
- }
- return addr;
-}
-
-/*
- * Round given address down to a multiple of the page size
- */
-static __inline__ ulong_t Round_Down_To_Page(ulong_t addr)
-{
- return addr & (~PAGE_MASK);
-}
-
-/*
- * Get the index of the page in memory.
- */
-static __inline__ int Page_Index(ulong_t addr)
-{
- return (int) (addr >> PAGE_POWER);
-}
-
-
-/*
- * Get the Page struct associated with given address.
- */
-static __inline__ struct Page *Get_Page(ulong_t addr)
-{
- extern struct Page* g_pageList;
- return &g_pageList[Page_Index(addr)];
- //return g_pageList + (sizeof(struct Page) * (int)(addr >> PAGE_POWER));
-}
-
-/*
- * Get the physical address of the memory represented by given Page object.
- */
-static __inline__ ulong_t Get_Page_Address(struct Page *page)
-{
- extern struct Page* g_pageList;
- ulong_t index = page - g_pageList;
- return index << PAGE_POWER;
-}
-
-#endif /* GEEKOS_MEM_H */
