palacios/include/palacios/vmm_util.h

   1 /* (c) 2008, Jack Lange <jarusl@cs.northwestern.edu> */
   2 /* (c) 2008, The V3VEE Project <http://www.v3vee.org> */
   3
   4 #ifndef __VMM_UTIL_H
   5 #define __VMM_UTIL_H
   6
   7 #ifdef __V3VEE__
   8
   9 #include <palacios/vmm_types.h>
  10
  11
  12 #ifndef PAGE_SIZE
  13 #define PAGE_SIZE 4096
  14 #endif
  15
  16
  17 typedef union reg_ex {
  18   ullong_t r_reg;
  19   struct {
  20     uint_t low;
  21     uint_t high;
  22   } e_reg;
  23
  24 } reg_ex_t;
  25
  26
  27
  28 // These are the GPRs layed out according to 'pusha'
  29 struct VMM_GPRs {
  30   uint_t edi;
  31   uint_t esi;
  32   uint_t ebp;
  33   uint_t esp;
  34   uint_t ebx;
  35   uint_t edx;
  36   uint_t ecx;
  37   uint_t eax;
  38 };
  39
  40
  41 #define GET_LOW_32(x) (*((uint_t*)(&(x))))
  42 #define GET_HIGH_32(x) (*((uint_t*)(((char*)(&(x)))+4)))
  43
  44
  45 void PrintTraceHex(unsigned char x);
  46 void PrintTraceLL(ullong_t num);
  47 void PrintTraceMemDump(unsigned char * start, int n);
  48
  49
  50
  51
  52 #define rdtsc(low,high)                                         \
  53      __asm__ __volatile__("rdtsc" : "=a" (low), "=d" (high))
  54
  55 #define rdtscl(low)                                             \
  56      __asm__ __volatile__("rdtsc" : "=a" (low) : : "edx")
  57
  58 #if defined(__i386__)
  59
  60 #define rdtscll(val)                            \
  61      __asm__ __volatile__("rdtsc" : "=A" (val))
  62
  63 #elif defined(__x86_64__)
  64
  65 #define rdtscll(val) do {                                   \
  66     unsigned int a,d;                                       \
  67     asm volatile("rdtsc" : "=a" (a), "=d" (d));             \
  68     (val) = ((unsigned long)a) | (((unsigned long)d)<<32);  \
  69   } while(0)
  70
  71 #endif
  72
  73
  74
  75
  76
  77
  78
  79
  80
  81 #ifdef __V3_64BIT__
  82
  83 # define do_div(n,base) ({                                      \
  84         uint32_t __base = (base);                               \
  85         uint32_t __rem;                                         \
  86         __rem = ((uint64_t)(n)) % __base;                       \
  87         (n) = ((uint64_t)(n)) / __base;                         \
  88         __rem;                                                  \
  89  })
  90
  91 #else
  92
  93 /*
  94  * do_div() is NOT a C function. It wants to return
  95  * two values (the quotient and the remainder), but
  96  * since that doesn't work very well in C, what it
  97  * does is:
  98  *
  99  * - modifies the 64-bit dividend _in_place_
 100  * - returns the 32-bit remainder
 101  *
 102  * This ends up being the most efficient "calling
 103  * convention" on x86.
 104  */
 105 #define do_div(n,base) ({                                    \
 106       unsigned long __upper, __low, __high, __mod, __base;   \
 107       __base = (base);                                       \
 108       asm("":"=a" (__low), "=d" (__high):"A" (n));           \
 109       __upper = __high;                                      \
 110       if (__high) {                                          \
 111         __upper = __high % (__base);                         \
 112         __high = __high / (__base);                          \
 113       }                                                                 \
 114       asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (__base), "0" (__low), "1" (__upper)); \
 115       asm("":"=A" (n):"a" (__low),"d" (__high));                        \
 116       __mod;                                                            \
 117     })
 118
 119
 120
 121 /* This divides two 64bit unsigned ints
 122  * The previous version only allows 32 bit bases(?)...
 123  *
 124  * NOTE: This absolutely sucks... there has to be a better way....
 125  */
 126 #define do_divll(n, base) ({                            \
 127       ullong_t __rem = 0;                               \
 128       ullong_t __num = 0;                               \
 129       while (n > base) {                                \
 130         __num++;                                        \
 131         n -= base;                                      \
 132       }                                                 \
 133       __rem = n;                                        \
 134       n = __num;                                        \
 135       __rem;                                            \
 136     })
 137
 138 #endif
 139
 140
 141
 142
 143
 144 #endif // ! __V3VEE__
 145
 146 #endif