palacios/include/palacios/vmm_util.h

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