X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?p=palacios.git;a=blobdiff_plain;f=geekos%2Finclude%2Fgeekos%2Fmem.h;fp=geekos%2Finclude%2Fgeekos%2Fmem.h;h=eebbb3fcfc612656b3e65b18b4439fc4d1e842ec;hp=0000000000000000000000000000000000000000;hb=ddc16b0737cf58f7aa90a69c6652cdf4090aec51;hpb=626595465a2c6987606a6bc697df65130ad8c2d3

diff --git a/geekos/include/geekos/mem.h b/geekos/include/geekos/mem.h
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+++ b/geekos/include/geekos/mem.h
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+/*
+ * 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: 1.2 $
+ * 
+ * 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 */
+
+
+
+#define KERNEL_HEAP_SIZE (512*PAGE_SIZE)
+
+#define VMM_AVAIL_MEM_SIZE  (4096 * PAGE_SIZE)
+
+/*
+ * PC memory map
+ */
+#define ISA_HOLE_START 0x0A0000
+#define ISA_HOLE_END   0x100000
+
+
+
+
+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 */