552 typedef struct spi {  struct
553 	ushort	spi_rbase;	/* Rx Buffer descriptor base address */  argument
554 	ushort	spi_tbase;	/* Tx Buffer descriptor base address */  argument
555 	u_char	spi_rfcr;	/* Rx function code */  argument
556 	u_char	spi_tfcr;	/* Tx function code */  argument
557 	ushort	spi_mrblr;	/* Max receive buffer length */  argument
558 	uint	spi_rstate;	/* Internal */  argument
559 	uint	spi_rdp;	/* Internal */  argument
560 	ushort	spi_rbptr;	/* Internal */  argument
561 	ushort	spi_rbc;	/* Internal */  argument
562 	uint	spi_rxtmp;	/* Internal */  argument
563 	uint	spi_tstate;	/* Internal */  argument
564 	uint	spi_tdp;	/* Internal */  argument
565 	ushort	spi_tbptr;	/* Internal */  argument
566 	ushort	spi_tbc;	/* Internal */  argument
567 	uint	spi_txtmp;	/* Internal */  argument
568 	uint	spi_res;  argument
569 	ushort	spi_rpbase;	/* Relocation pointer */  argument
570 	ushort	spi_res2;  argument