X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fgeekos%2Fgdt.c;fp=palacios%2Fsrc%2Fgeekos%2Fgdt.c;h=0000000000000000000000000000000000000000;hb=d38e1d6edeee83bfb1e3e3c6e2367faa5055bdfe;hp=707e34a2a4ea08d46b22ee2497a32151bbccf7f9;hpb=e70e95962c26832628d586e07f9cd1a2e1852d72;p=palacios.releases.git

diff --git a/palacios/src/geekos/gdt.c b/palacios/src/geekos/gdt.c
deleted file mode 100644
index 707e34a..0000000
--- a/palacios/src/geekos/gdt.c
+++ /dev/null
@@ -1,179 +0,0 @@
-/*
- * Initialize kernel GDT.
- * Copyright (c) 2001,2004 David H. Hovemeyer <daveho@cs.umd.edu>
- * $Revision: 1.4 $
- * 
- * This is free software.  You are permitted to use,
- * redistribute, and modify it as specified in the file "COPYING".
- */
-
-#include <geekos/kassert.h>
-#include <geekos/segment.h>
-#include <geekos/int.h>
-#include <geekos/tss.h>
-#include <geekos/gdt.h>
-#include <libc/string.h>
-
-#include <geekos/debug.h>
-
-/*
- * This is defined in lowlevel.asm.
- */
-extern void Load_GDTR(ushort_t* limitAndBase);
-
-/* ----------------------------------------------------------------------
- * Data
- * ---------------------------------------------------------------------- */
-
-/*
- * Number of entries in the kernel GDT.
- */
-#define NUM_GDT_ENTRIES 16
-
-/*
- * This is the kernel's global descriptor table.
- */
-struct Segment_Descriptor s_GDT[NUM_GDT_ENTRIES];
-/*
- * Number of allocated GDT entries.
- */
-static int s_numAllocated = 0;
-
-
-
-
-
-void DumpGDT()
-{
-  int i;
-  PrintBoth("GDT Contents:\n");
-
-  for (i=0;i<NUM_GDT_ENTRIES;i++) { 
-    if (s_GDT[i].present) { 
-      PrintBoth("%d: base=%u, limit=%u, sizeLow=%u,  baseLow=%u, type=%u, system=%u, dpl=%u, preent=%u, sizeHigh=%u, avail=%u, reserved=%u, dbBit=%u, granularity=%u, baseHigh=%u\n", 
-	    i,
-	    (s_GDT[i].baseHigh<<24) + s_GDT[i].baseLow,
-	    (s_GDT[i].sizeHigh<<16) + s_GDT[i].sizeLow,
-	    s_GDT[i].sizeLow,
-	    s_GDT[i].baseLow,
-	    s_GDT[i].type,
-	    s_GDT[i].system,
-    	    s_GDT[i].dpl,
-	    s_GDT[i].present,
-	    s_GDT[i].sizeHigh,
-	    s_GDT[i].avail,
-	    s_GDT[i].reserved,
-	    s_GDT[i].dbBit,
-	    s_GDT[i].granularity,
-	    s_GDT[i].baseHigh  );
-    } else {
-      PrintBoth("%d: Not Present\n",i);
-    }
-  }
-}
-
-
-/* ----------------------------------------------------------------------
- * Functions
- * ---------------------------------------------------------------------- */
-
-/*
- * Allocate an descriptor from the GDT.
- * Returns null if there are none left.
- */
-struct Segment_Descriptor* Allocate_Segment_Descriptor(void)
-{
-    struct Segment_Descriptor* result = 0;
-    int i;
-    bool iflag;
-
-    iflag = Begin_Int_Atomic();
-
-    /* Note; entry 0 is unused (thus never allocated) */
-    for (i = 1; i < NUM_GDT_ENTRIES; ++i) {
-	struct Segment_Descriptor *desc = &s_GDT[ i ];
-	if (desc->avail) {
-	    ++s_numAllocated;
-	    desc->avail = 0;
-	    result = desc;
-	    break;
-	}
-    }
-
-    End_Int_Atomic(iflag);
-
-    return result;
-}
-
-/*
- * Free a segment descriptor.
- */
-void Free_Segment_Descriptor(struct Segment_Descriptor* desc)
-{
-    bool iflag = Begin_Int_Atomic();
-
-    KASSERT(!desc->avail);
-
-    Init_Null_Segment_Descriptor(desc);
-    desc->avail = 1;
-    --s_numAllocated;
-
-    End_Int_Atomic(iflag);
-}
-
-/*
- * Get the index (int the GDT) of given segment descriptor.
- */
-int Get_Descriptor_Index(struct Segment_Descriptor* desc)
-{
-    return (int) (desc - s_GDT);
-}
-
-/*
- * Initialize the kernel's GDT.
- */
-void Init_GDT(void)
-{
-    ushort_t limitAndBase[3];
-    ulong_t gdtBaseAddr = (ulong_t) s_GDT;
-    struct Segment_Descriptor* desc;
-    int i;
-
-
-    KASSERT(sizeof(struct Segment_Descriptor) == 8);
-
-    /* Clear out entries. */
-    for (i = 0; i < NUM_GDT_ENTRIES; ++i) {
-	desc = &s_GDT[ i ];
-	Init_Null_Segment_Descriptor(desc);
-	desc->avail = 1;
-    }
-
-    /* Kernel code segment. */
-    desc = Allocate_Segment_Descriptor();
-    Init_Code_Segment_Descriptor(
-	desc,
-	0,		 /* base address */
-	0x100000,	 /* num pages (== 2^20) */
-	0		 /* privilege level (0 == kernel) */
-    );
-    KASSERT(Get_Descriptor_Index(desc) == (KERNEL_CS >> 3));
-
-    /* Kernel data segment. */
-    desc = Allocate_Segment_Descriptor();
-    Init_Data_Segment_Descriptor(
-	desc,
-	0,		 /* base address */
-	0x100000,	 /* num pages (== 2^20) */
-	0		 /* privilege level (0 == kernel) */
-    );
-    KASSERT(Get_Descriptor_Index(desc) == (KERNEL_DS >> 3));
-
-    Print("GDT: Base=0x%.8x, limit=%d\n", (uint_t)gdtBaseAddr,  (uint_t)(sizeof(struct Segment_Descriptor) * NUM_GDT_ENTRIES));
-
-    /* Activate the kernel GDT. */
-    limitAndBase[0] = sizeof(struct Segment_Descriptor) * NUM_GDT_ENTRIES;
-    limitAndBase[1] = gdtBaseAddr & 0xffff;
-    limitAndBase[2] = gdtBaseAddr >> 16;
-    Load_GDTR(limitAndBase);
-}