sgi: work in progress kernel for sgi mips machines (only tested with r5k indy)

this provides basic console support using the ARC bios routines
theu uartarcs driver. and has native seeq ethernet driver which
was written by reading the 2ed devseq driver as i have no
documentation on the hardware. mmu and trap code is based on the
routerboard kernel.

1 files changed, 40 insertions, 0 deletions

diff --git a/sys/src/9/sgi/etherif.h b/sys/src/9/sgi/etherif.h
new file mode 100644
index 000000000..035dd64cb
--- /dev/null
+++ b/sys/src/9/sgi/etherif.h
@@ -0,0 +1,40 @@
+enum {
+	MaxEther	= 1,
+	Ntypes		= 8,
+};
+
+typedef struct Ether Ether;
+struct Ether {
+
+	int	ctlrno;
+	int	minmtu;
+	int 	maxmtu;
+	uchar	ea[Eaddrlen];
+	
+	int	irq, irqlevel;
+	uintptr port;
+
+	void	(*attach)(Ether*);	/* filled in by reset routine */
+	void	(*detach)(Ether*);
+	void	(*transmit)(Ether*);
+	void	(*interrupt)(Ureg*, void*);
+	long	(*ifstat)(Ether*, void*, long, ulong);
+	long 	(*ctl)(Ether*, void*, long); /* custom ctl messages */
+	void	(*power)(Ether*, int);	/* power on/off */
+	void	(*shutdown)(Ether*);	/* shutdown hardware before reboot */
+	void	*ctlr;
+
+	Queue*	oq;
+
+	Netif;
+};
+
+extern Block* etheriq(Ether*, Block*, int);
+extern void addethercard(char*, int(*)(Ether*));
+extern ulong ethercrc(uchar*, int);
+extern int parseether(uchar*, char*);
+
+#define NEXT(x, l)	(((x)+1)%(l))
+#define PREV(x, l)	(((x) == 0) ? (l)-1: (x)-1)
+#define	HOWMANY(x, y)	(((x)+((y)-1))/(y))
+#define ROUNDUP(x, y)	(HOWMANY((x), (y))*(y))