75 lines
1.5 KiB
C
Executable file
75 lines
1.5 KiB
C
Executable file
/*
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* Ctlr for the boards using the National Semiconductor DP8390
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* and SMC 83C90 Network Interface Controller.
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* Common code is in ether8390.c.
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*/
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typedef struct {
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Lock;
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ulong port; /* I/O address of 8390 */
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ulong data; /* I/O data port if no shared memory */
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uchar width; /* data transfer width in bytes */
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uchar ram; /* true if card has shared memory */
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uchar dummyrr; /* do dummy remote read */
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uchar nxtpkt; /* receive: software bndry */
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uchar pstart;
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uchar pstop;
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int txbusy; /* transmit */
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uchar tstart; /* 8390 ring addresses */
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uchar mar[8]; /* shadow multicast address registers */
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int mref[64]; /* reference counts for multicast groups */
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} Dp8390;
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#define Dp8390BufSz 256
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extern int dp8390reset(Ether*);
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extern void *dp8390read(Dp8390*, void*, ulong, ulong);
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extern void dp8390getea(Ether*, uchar*);
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extern void dp8390setea(Ether*);
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/*
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* x86-specific code.
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*/
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#define regr(c, r) inb((c)->port+(r))
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#define regw(c, r, v) outb((c)->port+(r), (v))
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static void
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rdread(Dp8390* ctlr, void* to, int len)
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{
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switch(ctlr->width){
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default:
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panic("dp8390 rdread: width %d\n", ctlr->width);
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break;
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case 2:
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inss(ctlr->data, to, len/2);
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break;
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case 1:
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insb(ctlr->data, to, len);
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break;
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}
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}
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static void
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rdwrite(Dp8390* ctlr, void* from, int len)
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{
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switch(ctlr->width){
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default:
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panic("dp8390 rdwrite: width %d\n", ctlr->width);
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break;
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case 2:
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outss(ctlr->data, from, len/2);
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break;
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case 1:
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outsb(ctlr->data, from, len);
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break;
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}
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}
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