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 #ifndef PAGE_SIZE
  29 #define PAGE_SIZE 4096
  30 #endif
  31
  32
  33 typedef union reg_ex {
  34   ullong_t r_reg;
  35   struct {
  36     uint_t low;
  37     uint_t high;
  38   } e_reg;
  39
  40 } reg_ex_t;
  41
  42
  43
  44 // These are the GPRs layed out according to 'pusha'
  45 struct VMM_GPRs {
  46   uint_t edi;
  47   uint_t esi;
  48   uint_t ebp;
  49   uint_t esp;
  50   uint_t ebx;
  51   uint_t edx;
  52   uint_t ecx;
  53   uint_t eax;
  54 };
  55
  56
  57 #define GET_LOW_32(x) (*((uint_t*)(&(x))))
  58 #define GET_HIGH_32(x) (*((uint_t*)(((char*)(&(x)))+4)))
  59
  60
  61 void PrintTraceHex(unsigned char x);
  62 void PrintTraceLL(ullong_t num);
  63 void PrintTraceMemDump(unsigned char * start, int n);
  64
  65
  66
  67
  68 #define rdtsc(low,high)                                         \
  69      __asm__ __volatile__("rdtsc" : "=a" (low), "=d" (high))
  70
  71 #define rdtscl(low)                                             \
  72      __asm__ __volatile__("rdtsc" : "=a" (low) : : "edx")
  73
  74 #if defined(__i386__)
  75
  76 #define rdtscll(val)                            \
  77      __asm__ __volatile__("rdtsc" : "=A" (val))
  78
  79 #elif defined(__x86_64__)
  80
  81 #define rdtscll(val) do {                                   \
  82     unsigned int a,d;                                       \
  83     asm volatile("rdtsc" : "=a" (a), "=d" (d));             \
  84     (val) = ((unsigned long)a) | (((unsigned long)d)<<32);  \
  85   } while(0)
  86
  87 #endif
  88
  89
  90
  91
  92
  93
  94
  95
  96
  97 #ifdef __V3_64BIT__
  98
  99 # define do_div(n,base) ({                                      \
 100         uint32_t __base = (base);                               \
 101         uint32_t __rem;                                         \
 102         __rem = ((uint64_t)(n)) % __base;                       \
 103         (n) = ((uint64_t)(n)) / __base;                         \
 104         __rem;                                                  \
 105  })
 106
 107 #else
 108
 109 /*
 110  * do_div() is NOT a C function. It wants to return
 111  * two values (the quotient and the remainder), but
 112  * since that doesn't work very well in C, what it
 113  * does is:
 114  *
 115  * - modifies the 64-bit dividend _in_place_
 116  * - returns the 32-bit remainder
 117  *
 118  * This ends up being the most efficient "calling
 119  * convention" on x86.
 120  */
 121 #define do_div(n,base) ({                                    \
 122       unsigned long __upper, __low, __high, __mod, __base;   \
 123       __base = (base);                                       \
 124       asm("":"=a" (__low), "=d" (__high):"A" (n));           \
 125       __upper = __high;                                      \
 126       if (__high) {                                          \
 127         __upper = __high % (__base);                         \
 128         __high = __high / (__base);                          \
 129       }                                                                 \
 130       asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (__base), "0" (__low), "1" (__upper)); \
 131       asm("":"=A" (n):"a" (__low),"d" (__high));                        \
 132       __mod;                                                            \
 133     })
 134
 135
 136
 137 /* This divides two 64bit unsigned ints
 138  * The previous version only allows 32 bit bases(?)...
 139  *
 140  * NOTE: This absolutely sucks... there has to be a better way....
 141  */
 142 #define do_divll(n, base) ({                            \
 143       ullong_t __rem = 0;                               \
 144       ullong_t __num = 0;                               \
 145       while (n > base) {                                \
 146         __num++;                                        \
 147         n -= base;                                      \
 148       }                                                 \
 149       __rem = n;                                        \
 150       n = __num;                                        \
 151       __rem;                                            \
 152     })
 153
 154 #endif
 155
 156
 157
 158
 159
 160 #endif // ! __V3VEE__
 161
 162 #endif