sm64

A Super Mario 64 decompilation
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osPiStartDma.c (962B)

      1 #include "libultra_internal.h"
      2 #include "piint.h"
      3 
      4 s32 osPiStartDma(OSIoMesg *mb, s32 priority, s32 direction, uintptr_t devAddr, void *vAddr,
      5                  size_t nbytes, OSMesgQueue *mq) {
      6     register s32 result;
      7     register OSMesgQueue *cmdQueue;
      8     if (!__osPiDevMgr.active) {
      9         return -1;
     10     }
     11 
     12     // TODO: name magic constants
     13     if (direction == OS_READ) {
     14         mb->hdr.type = 11;
     15     } else {
     16         mb->hdr.type = 12;
     17     }
     18 
     19     mb->hdr.pri = priority;
     20     mb->hdr.retQueue = mq;
     21     mb->dramAddr = vAddr;
     22     mb->devAddr = devAddr;
     23     mb->size = nbytes;
     24 #if defined(VERSION_EU) || defined(VERSION_SH) || defined(VERSION_CN)
     25     mb->piHandle = NULL;
     26 #endif
     27 
     28     if (priority == OS_MESG_PRI_HIGH) {
     29         cmdQueue = osPiGetCmdQueue();
     30         result = osJamMesg(cmdQueue, mb, OS_MESG_NOBLOCK);
     31     } else {
     32         cmdQueue = osPiGetCmdQueue();
     33         result = osSendMesg(cmdQueue, mb, OS_MESG_NOBLOCK);
     34     }
     35     return result;
     36 }