soh/src/libultra/io/sprawdma.c


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#include "global.h"

s32 __osSpRawStartDma(s32 direction, void* devAddr, void* dramAddr, size_t size) {
    if (__osSpDeviceBusy()) {
        return -1;
    }
    HW_REG(SP_MEM_ADDR_REG, u32) = (u32)devAddr;
    HW_REG(SP_DRAM_ADDR_REG, u32) = osVirtualToPhysical(dramAddr);
    if (direction == OS_READ) {
        HW_REG(SP_WR_LEN_REG, u32) = size - 1;
    } else {
        HW_REG(SP_RD_LEN_REG, u32) = size - 1;
    }
    return 0;
}