oot/src/libultra_code/sptask.c

#include "libultra_internal.h"
#include <ultra64/hardware.h>

#define _osVirtualToPhysical(ptr)              \
    if (ptr != NULL) {                         \
        ptr = (void*)osVirtualToPhysical(ptr); \
    }

static OSTask sTmpTask;
OSTask* _VirtualToPhysicalTask(OSTask* intp) {
    OSTask* tp;
    tp = &sTmpTask;
    bcopy(intp, tp, sizeof(OSTask));

    _osVirtualToPhysical(tp->t.ucode);
    _osVirtualToPhysical(tp->t.ucode_data);
    _osVirtualToPhysical(tp->t.dram_stack);
    _osVirtualToPhysical(tp->t.output_buff);
    _osVirtualToPhysical(tp->t.output_buff_size);
    _osVirtualToPhysical(tp->t.data_ptr);
    _osVirtualToPhysical(tp->t.yield_data_ptr);
    return tp;
}

#ifdef NON_MATCHING
// very close to matching, just regalloc
void osSpTaskLoad(OSTask* intp) {

    OSTask* tp;
    tp = _VirtualToPhysicalTask(intp);
    if (tp->t.flags & OS_TASK_YIELDED) {
        tp->t.ucode_data = tp->t.yield_data_ptr;
        tp->t.ucode_data_size = tp->t.yield_data_size;
        intp->t.flags &= ~OS_TASK_YIELDED;
        if (tp->t.flags & OS_TASK_LOADABLE) {
            tp->t.ucode = HW_REG((u32)intp->t.yield_data_ptr + OS_YIELD_DATA_SIZE - 4, u32);
        }
    }
    osWritebackDCache(tp, sizeof(OSTask));
    __osSpSetStatus(SP_CLR_SIG0 | SP_CLR_SIG1 | SP_CLR_SIG2 | SP_SET_INTR_BREAK);
    while (__osSpSetPc(SP_IMEM_START) == -1) {
        ;
    }

    while (__osSpRawStartDma(1, (SP_IMEM_START - sizeof(*tp)), tp, sizeof(OSTask)) == -1) {
        ;
    }

    while (__osSpDeviceBusy()) {
        ;
    }

    while (__osSpRawStartDma(1, SP_IMEM_START, tp->t.ucode_boot, tp->t.ucode_boot_size) == -1) {
        ;
    }
}
#else
#pragma GLOBAL_ASM("asm/non_matchings/code/sptask/osSpTaskLoad.s")
#endif

void osSpTaskStartGo(OSTask* tp) {

    while (__osSpDeviceBusy()) {
        ;
    }

    __osSpSetStatus(SP_SET_INTR_BREAK | SP_CLR_SSTEP | SP_CLR_BROKE | SP_CLR_HALT);
}