palacios/include/palacios/vmm_util.h

   1 /*
   2  * This file is part of the Palacios Virtual Machine Monitor developed
   3  * by the V3VEE Project with funding from the United States National
   4  * Science Foundation and the Department of Energy.
   5  *
   6  * The V3VEE Project is a joint project between Northwestern University
   7  * and the University of New Mexico.  You can find out more at
   8  * http://www.v3vee.org
   9  *
  10  * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
  11  * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
  12  * All rights reserved.
  13  *
  14  * Author: Jack Lange <jarusl@cs.northwestern.edu>
  15  *
  16  * This is free software.  You are permitted to use,
  17  * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
  18  */
  19
  20 #ifndef __VMM_UTIL_H
  21 #define __VMM_UTIL_H
  22
  23 #ifdef __V3VEE__
  24
  25 #include <palacios/vmm_types.h>
  26
  27
  28 typedef union reg_ex {
  29   ullong_t r_reg;
  30   struct {
  31     uint_t low;
  32     uint_t high;
  33   } e_reg;
  34
  35 } reg_ex_t;
  36
  37
  38
  39 // These are the GPRs layed out according to 'pusha'
  40 struct VMM_GPRs {
  41   uint_t edi;
  42   uint_t esi;
  43   uint_t ebp;
  44   uint_t esp;
  45   uint_t ebx;
  46   uint_t edx;
  47   uint_t ecx;
  48   uint_t eax;
  49 };
  50
  51
  52 #define GET_LOW_32(x) (*((uint_t*)(&(x))))
  53 #define GET_HIGH_32(x) (*((uint_t*)(((uchar_t*)(&(x)))+4)))
  54
  55
  56 void PrintTraceHex(uchar_t x);
  57 void PrintTraceLL(ullong_t num);
  58 void PrintTraceMemDump(uchar_t * start, int n);
  59
  60
  61
  62
  63 #define rdtsc(low,high)                                         \
  64      __asm__ __volatile__("rdtsc" : "=a" (low), "=d" (high))
  65
  66 #define rdtscl(low)                                             \
  67      __asm__ __volatile__("rdtsc" : "=a" (low) : : "edx")
  68
  69
  70
  71 #define rdtscll(val)                                                    \
  72   do {                                                                  \
  73     uint64_t tsc;                                                       \
  74     uint32_t a, d;                                                      \
  75     asm volatile("rdtsc" : "=a" (a), "=d" (d));                         \
  76     *(uint32_t *)&(tsc) = a;                                            \
  77     *(uint32_t *)(((uchar_t *)&tsc) + 4) = d;                           \
  78     val = tsc;                                                          \
  79   } while (0)
  80
  81 /*
  82 #if __V3_32BIT__
  83
  84 #define rdtscll(val)                            \
  85      __asm__ __volatile__("rdtsc" : "=A" (val))
  86
  87 #elif __V3_64BIT__
  88
  89 #define rdtscll(val) do {                                   \
  90     unsigned int a,d;                                       \
  91     asm volatile("rdtsc" : "=a" (a), "=d" (d));             \
  92     (val) = ((unsigned long)a) | (((unsigned long)d)<<32);  \
  93   } while(0)
  94
  95 #endif
  96 */
  97
  98
  99
 100
 101
 102 #ifdef __V3_64BIT__
 103
 104
 105 #define do_divll(n, base) ({                            \
 106       uint64_t __rem = 0;                               \
 107       uint64_t __num = 0;                               \
 108       while (n > base) {                                \
 109         __num++;                                        \
 110         n -= base;                                      \
 111       }                                                 \
 112       __rem = n;                                        \
 113       n = __num;                                        \
 114       __rem;                                            \
 115     })
 116
 117 //#define do_divll do_div
 118
 119
 120 /*
 121   #define do_div(n,base) ({                                     \
 122   uint32_t __base = (base);                                     \
 123   uint32_t __rem;                                               \
 124   __rem = ((uint64_t)(n)) % __base;                             \
 125   (n) = ((uint64_t)(n)) / __base;                               \
 126   __rem;                                                        \
 127   })
 128 */
 129
 130 #else
 131
 132 /*
 133  * do_div() is NOT a C function. It wants to return
 134  * two values (the quotient and the remainder), but
 135  * since that doesn't work very well in C, what it
 136  * does is:
 137  *
 138  * - modifies the 64-bit dividend _in_place_
 139  * - returns the 32-bit remainder
 140  *
 141  * This ends up being the most efficient "calling
 142  * convention" on x86.
 143  */
 144 #define do_div(n,base) ({                                    \
 145       unsigned long __upper, __low, __high, __mod, __base;   \
 146       __base = (base);                                       \
 147       asm("":"=a" (__low), "=d" (__high):"A" (n));           \
 148       __upper = __high;                                      \
 149       if (__high) {                                          \
 150         __upper = __high % (__base);                         \
 151         __high = __high / (__base);                          \
 152       }                                                                 \
 153       asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (__base), "0" (__low), "1" (__upper)); \
 154       asm("":"=A" (n):"a" (__low),"d" (__high));                        \
 155       __mod;                                                            \
 156     })
 157
 158
 159
 160 /* This divides two 64bit unsigned ints
 161  * The previous version only allows 32 bit bases(?)...
 162  *
 163  * NOTE: This absolutely sucks... there has to be a better way....
 164  */
 165 #define do_divll(n, base) ({                            \
 166       ullong_t __rem = 0;                               \
 167       ullong_t __num = 0;                               \
 168       while (n > base) {                                \
 169         __num++;                                        \
 170         n -= base;                                      \
 171       }                                                 \
 172       __rem = n;                                        \
 173       n = __num;                                        \
 174       __rem;                                            \
 175     })
 176
 177 #endif
 178
 179
 180
 181
 182
 183 #endif // ! __V3VEE__
 184
 185 #endif