631 typedef struct spi {  struct
632 	ushort	spi_rbase;	/* Rx Buffer descriptor base address */  argument
633 	ushort	spi_tbase;	/* Tx Buffer descriptor base address */  argument
634 	u_char	spi_rfcr;	/* Rx function code */  argument
635 	u_char	spi_tfcr;	/* Tx function code */  argument
636 	ushort	spi_mrblr;	/* Max receive buffer length */  argument
637 	uint	spi_rstate;	/* Internal */  argument
638 	uint	spi_rdp;	/* Internal */  argument
639 	ushort	spi_rbptr;	/* Internal */  argument
640 	ushort	spi_rbc;	/* Internal */  argument
641 	uint	spi_rxtmp;	/* Internal */  argument
642 	uint	spi_tstate;	/* Internal */  argument
643 	uint	spi_tdp;	/* Internal */  argument
644 	ushort	spi_tbptr;	/* Internal */  argument
645 	ushort	spi_tbc;	/* Internal */  argument
646 	uint	spi_txtmp;	/* Internal */  argument
647 	uint	spi_res;	/* Tx temp. */  argument
648 	uint	spi_res1[4];	/* SDMA temp. */  argument