added geode driver

1 files changed, 20 insertions, 0 deletions

diff --git a/sys/src/9/pc/devarch.c b/sys/src/9/pc/devarch.c
index bd216c2ad..3228736ee 100644
--- a/sys/src/9/pc/devarch.c
+++ b/sys/src/9/pc/devarch.c
@@ -33,6 +33,7 @@ enum {
 	Qiob,
 	Qiow,
 	Qiol,
+	Qmsr,
 	Qbase,
 
 	Qmax = 16,
@@ -55,6 +56,7 @@ static Dirtab archdir[Qmax] = {
 	"iob",		{ Qiob, 0 },		0,	0660,
 	"iow",		{ Qiow, 0 },		0,	0660,
 	"iol",		{ Qiol, 0 },		0,	0660,
+	"msr",	{ Qmsr, 0},	0,	0660,
 };
 Lock archwlock;	/* the lock is only for changing archdir */
 int narchdir = Qbase;
@@ -356,6 +358,7 @@ archread(Chan *c, void *a, long n, vlong offset)
 	int port;
 	ushort *sp;
 	ulong *lp;
+	vlong *vp;
 	IOMap *m;
 	Rdwrfn *fn;
 
@@ -389,6 +392,14 @@ archread(Chan *c, void *a, long n, vlong offset)
 			*lp++ = inl(port);
 		return n;
 
+	case Qmsr:
+		if(n & 7)
+			error(Ebadarg);
+		vp = a;
+		for(port = offset; port < offset+n; port += 8)
+			rdmsr(port, vp++);
+		return n;
+
 	case Qioalloc:
 		break;
 
@@ -429,6 +440,7 @@ archwrite(Chan *c, void *a, long n, vlong offset)
 	int port;
 	ushort *sp;
 	ulong *lp;
+	vlong *vp;
 	Rdwrfn *fn;
 
 	switch((ulong)c->qid.path){
@@ -458,6 +470,14 @@ archwrite(Chan *c, void *a, long n, vlong offset)
 			outl(port, *lp++);
 		return n;
 
+	case Qmsr:
+		if(n & 7)
+			error(Ebadarg);
+		vp = a;
+		for(port = offset; port < offset+n; port += 8)
+			wrmsr(port, *vp++);
+		return n;
+
 	default:
 		if(c->qid.path < narchdir && (fn = writefn[c->qid.path]))
 			return fn(c, a, n, offset);