arch/arch-riscv64.h

   1 #ifndef ARCH_RISCV64_H
   2 #define ARCH_RISCV64_H
   3
   4 #include <unistd.h>
   5 #include <stdlib.h>
   6 #include <sys/types.h>
   7 #include <sys/wait.h>
   8
   9 #define FIO_ARCH        (arch_riscv64)
  10
  11 #define nop             __asm__ __volatile__ ("nop")
  12 #define read_barrier()          __asm__ __volatile__("fence r, r": : :"memory")
  13 #define write_barrier()         __asm__ __volatile__("fence w, w": : :"memory")
  14
  15 static inline unsigned long long get_cpu_clock(void)
  16 {
  17         unsigned long val;
  18
  19         asm volatile("rdtime %0" : "=r"(val));
  20         return val;
  21 }
  22 #define ARCH_HAVE_CPU_CLOCK
  23
  24 #define ARCH_HAVE_INIT
  25 extern bool tsc_reliable;
  26 static inline int arch_init(char *envp[])
  27 {
  28         tsc_reliable = true;
  29         return 0;
  30 }
  31
  32 #define __do_syscallM(...) ({                                           \
  33         __asm__ volatile (                                              \
  34                 "ecall"                                                 \
  35                 : "=r"(a0)                                              \
  36                 : __VA_ARGS__                                           \
  37                 : "memory", "a1");                                      \
  38         (long) a0;                                                      \
  39 })
  40
  41 #define __do_syscallN(...) ({                                           \
  42         __asm__ volatile (                                              \
  43                 "ecall"                                                 \
  44                 : "=r"(a0)                                              \
  45                 : __VA_ARGS__                                           \
  46                 : "memory");                                    \
  47         (long) a0;                                                      \
  48 })
  49
  50 #define __do_syscall0(__n) ({                                           \
  51         register long a7 __asm__("a7") = __n;                           \
  52         register long a0 __asm__("a0");                                 \
  53                                                                         \
  54         __do_syscallM("r" (a7));                                        \
  55 })
  56
  57 #define __do_syscall1(__n, __a) ({                                      \
  58         register long a7 __asm__("a7") = __n;                           \
  59         register __typeof__(__a) a0 __asm__("a0") = __a;                \
  60                                                                         \
  61         __do_syscallM("r" (a7), "0" (a0));                              \
  62 })
  63
  64 #define __do_syscall2(__n, __a, __b) ({                                 \
  65         register long a7 __asm__("a7") = __n;                           \
  66         register __typeof__(__a) a0 __asm__("a0") = __a;                \
  67         register __typeof__(__b) a1 __asm__("a1") = __b;                \
  68                                                                         \
  69         __do_syscallN("r" (a7), "0" (a0), "r" (a1));                    \
  70 })
  71
  72 #define __do_syscall3(__n, __a, __b, __c) ({                            \
  73         register long a7 __asm__("a7") = __n;                           \
  74         register __typeof__(__a) a0 __asm__("a0") = __a;                \
  75         register __typeof__(__b) a1 __asm__("a1") = __b;                \
  76         register __typeof__(__c) a2 __asm__("a2") = __c;                \
  77                                                                         \
  78         __do_syscallN("r" (a7), "0" (a0), "r" (a1), "r" (a2));          \
  79 })
  80
  81 #define __do_syscall4(__n, __a, __b, __c, __d) ({                       \
  82         register long a7 __asm__("a7") = __n;                           \
  83         register __typeof__(__a) a0 __asm__("a0") = __a;                \
  84         register __typeof__(__b) a1 __asm__("a1") = __b;                \
  85         register __typeof__(__c) a2 __asm__("a2") = __c;                \
  86         register __typeof__(__d) a3 __asm__("a3") = __d;                \
  87                                                                         \
  88         __do_syscallN("r" (a7), "0" (a0), "r" (a1), "r" (a2), "r" (a3));\
  89 })
  90
  91 #define __do_syscall5(__n, __a, __b, __c, __d, __e) ({                  \
  92         register long a7 __asm__("a7") = __n;                           \
  93         register __typeof__(__a) a0 __asm__("a0") = __a;                \
  94         register __typeof__(__b) a1 __asm__("a1") = __b;                \
  95         register __typeof__(__c) a2 __asm__("a2") = __c;                \
  96         register __typeof__(__d) a3 __asm__("a3") = __d;                \
  97         register __typeof__(__e) a4 __asm__("a4") = __e;                \
  98                                                                         \
  99         __do_syscallN("r" (a7), "0" (a0), "r" (a1), "r" (a2), "r" (a3), \
 100                         "r"(a4));                                       \
 101 })
 102
 103 #define __do_syscall6(__n, __a, __b, __c, __d, __e, __f) ({             \
 104         register long a7 __asm__("a7") = __n;                           \
 105         register __typeof__(__a) a0 __asm__("a0") = __a;                \
 106         register __typeof__(__b) a1 __asm__("a1") = __b;                \
 107         register __typeof__(__c) a2 __asm__("a2") = __c;                \
 108         register __typeof__(__d) a3 __asm__("a3") = __d;                \
 109         register __typeof__(__e) a4 __asm__("a4") = __e;                \
 110         register __typeof__(__f) a5 __asm__("a5") = __f;                \
 111                                                                         \
 112         __do_syscallN("r" (a7), "0" (a0), "r" (a1), "r" (a2), "r" (a3), \
 113                         "r" (a4), "r"(a5));                             \
 114 })
 115
 116 #define FIO_ARCH_HAS_SYSCALL
 117
 118 #endif