src/libultra/io/epidma.c


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#include "ultra64.h"
#include "ultra64/internal.h"

s32 osEPiStartDma(OSPiHandle* handle, OSIoMesg* mb, s32 direction) {
    register s32 ret;

    if (!__osPiDevMgr.active) {
        return -1;
    }

    mb->piHandle = handle;
    if (direction == OS_READ) {
        mb->hdr.type = 0xF;
    } else {
        mb->hdr.type = 0x10;
    }

    if (mb->hdr.pri == 1) {
        ret = osJamMesg(osPiGetCmdQueue(), (OSMesg)mb, OS_MESG_NOBLOCK);
    } else {
        ret = osSendMesg(osPiGetCmdQueue(), (OSMesg)mb, OS_MESG_NOBLOCK);
    }

    return ret;
}