From aeb49aca9efeb5c2158a48941e042e1b05ee2370 Mon Sep 17 00:00:00 2001
From: Matthew Veety <mveety@gmail.com>
Date: Sun, 12 Jan 2014 11:00:38 -0500
Subject: added a segment for segattach(2) that gives access to the raspberry
 pi's gpio header.

---
 sys/src/9/bcm/main.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/sys/src/9/bcm/main.c b/sys/src/9/bcm/main.c
index 1b78c80d1..9afe84b1a 100644
--- a/sys/src/9/bcm/main.c
+++ b/sys/src/9/bcm/main.c
@@ -215,6 +215,19 @@ optionsinit(char* s)
 	oargv[oargc] = nil;
 }
 
+void
+gpiomeminit(void)
+{
+	Physseg seg;
+	memset(&seg, 0, sizeof seg);
+	seg.attr = SG_PHYSICAL;
+	seg.name = "gpio";
+	seg.pa = (VIRTIO+0x200000);
+	seg.size = 1;
+	addphysseg(&seg);
+}
+
+
 void
 main(void)
 {
@@ -259,6 +272,7 @@ main(void)
 	pageinit();
 	swapinit();
 	userinit();
+	gpiomeminit();
 	schedinit();
 	assert(0);			/* shouldn't have returned */
 }
-- 
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