arch/sh/syscall_arch.h

   1 #define __SYSCALL_LL_E(x) \
   2 ((union { long long ll; long l[2]; }){ .ll = x }).l[0], \
   3 ((union { long long ll; long l[2]; }){ .ll = x }).l[1]
   4 #define __SYSCALL_LL_O(x) __SYSCALL_LL_E((x))
   5
   6 /* The extra OR instructions are to work around a hardware bug:
   7  * http://documentation.renesas.com/doc/products/mpumcu/tu/tnsh7456ae.pdf
   8  */
   9 #define __asm_syscall(trapno, ...) do {   \
  10         __asm__ __volatile__ (                \
  11                 "trapa #31\n"            \
  12                 "or r0, r0\n"                     \
  13                 "or r0, r0\n"                     \
  14                 "or r0, r0\n"                     \
  15                 "or r0, r0\n"                     \
  16                 "or r0, r0\n"                     \
  17         : "=r"(r0) : __VA_ARGS__ : "memory"); \
  18         return r0;                            \
  19         } while (0)
  20
  21 static inline long __syscall0(long n)
  22 {
  23         register long r3 __asm__("r3") = n;
  24         register long r0 __asm__("r0");
  25         __asm_syscall(16, "r"(r3));
  26 }
  27
  28 static inline long __syscall1(long n, long a)
  29 {
  30         register long r3 __asm__("r3") = n;
  31         register long r4 __asm__("r4") = a;
  32         register long r0 __asm__("r0");
  33         __asm_syscall(17, "r"(r3), "r"(r4));
  34 }
  35
  36 static inline long __syscall2(long n, long a, long b)
  37 {
  38         register long r3 __asm__("r3") = n;
  39         register long r4 __asm__("r4") = a;
  40         register long r5 __asm__("r5") = b;
  41         register long r0 __asm__("r0");
  42         __asm_syscall(18, "r"(r3), "r"(r4), "r"(r5));
  43 }
  44
  45 static inline long __syscall3(long n, long a, long b, long c)
  46 {
  47         register long r3 __asm__("r3") = n;
  48         register long r4 __asm__("r4") = a;
  49         register long r5 __asm__("r5") = b;
  50         register long r6 __asm__("r6") = c;
  51         register long r0 __asm__("r0");
  52         __asm_syscall(19, "r"(r3), "r"(r4), "r"(r5), "r"(r6));
  53 }
  54
  55 static inline long __syscall4(long n, long a, long b, long c, long d)
  56 {
  57         register long r3 __asm__("r3") = n;
  58         register long r4 __asm__("r4") = a;
  59         register long r5 __asm__("r5") = b;
  60         register long r6 __asm__("r6") = c;
  61         register long r7 __asm__("r7") = d;
  62         register long r0 __asm__("r0");
  63         __asm_syscall(20, "r"(r3), "r"(r4), "r"(r5), "r"(r6), "r"(r7));
  64 }
  65
  66 static inline long __syscall5(long n, long a, long b, long c, long d, long e)
  67 {
  68         register long r3 __asm__("r3") = n;
  69         register long r4 __asm__("r4") = a;
  70         register long r5 __asm__("r5") = b;
  71         register long r6 __asm__("r6") = c;
  72         register long r7 __asm__("r7") = d;
  73         register long r0 __asm__("r0") = e;
  74         __asm_syscall(21, "r"(r3), "r"(r4), "r"(r5), "r"(r6), "r"(r7), "0"(r0));
  75 }
  76
  77 static inline long __syscall6(long n, long a, long b, long c, long d, long e, long f)
  78 {
  79         register long r3 __asm__("r3") = n;
  80         register long r4 __asm__("r4") = a;
  81         register long r5 __asm__("r5") = b;
  82         register long r6 __asm__("r6") = c;
  83         register long r7 __asm__("r7") = d;
  84         register long r0 __asm__("r0") = e;
  85         register long r1 __asm__("r1") = f;
  86         __asm_syscall(22, "r"(r3), "r"(r4), "r"(r5), "r"(r6), "r"(r7), "0"(r0), "r"(r1));
  87 }