SDMA_TCR
sdma_write(b, SDMA_TCR + i * sizeof(uint32_t), 0);
tcr_pa = MPC5200_MBAR_DEFAULT + MPC5200_REG_SDMA + SDMA_TCR + task * 2;
#define SDMA_TCR_TASK(n) (SDMA_TCR + (n) * 2)