hw/spapr_hcall.c

   1 #include "sysemu.h"
   2 #include "cpu.h"
   3 #include "qemu-char.h"
   4 #include "hw/spapr.h"
   5
   6 spapr_hcall_fn hypercall_table[(MAX_HCALL_OPCODE / 4) + 1];
   7
   8 void spapr_register_hypercall(target_ulong opcode, spapr_hcall_fn fn)
   9 {
  10     spapr_hcall_fn old_fn;
  11
  12     assert(opcode <= MAX_HCALL_OPCODE);
  13     assert((opcode & 0x3) == 0);
  14
  15     old_fn = hypercall_table[opcode / 4];
  16
  17     assert(!old_fn || (fn == old_fn));
  18
  19     hypercall_table[opcode / 4] = fn;
  20 }
  21
  22 target_ulong spapr_hypercall(CPUState *env, target_ulong opcode,
  23                              target_ulong *args)
  24 {
  25     if (msr_pr) {
  26         hcall_dprintf("Hypercall made with MSR[PR]=1\n");
  27         return H_PRIVILEGE;
  28     }
  29
  30     if ((opcode <= MAX_HCALL_OPCODE)
  31         && ((opcode & 0x3) == 0)) {
  32         spapr_hcall_fn fn = hypercall_table[opcode / 4];
  33
  34         if (fn) {
  35             return fn(env, spapr, opcode, args);
  36         }
  37     }
  38
  39     hcall_dprintf("Unimplemented hcall 0x" TARGET_FMT_lx "\n", opcode);
  40     return H_FUNCTION;
  41 }