Added skeletal support for /dev/usema and /dev/usemaclone.

Still need to figure out how to do SVR-style clone devices with
fops->open(), and I need a good poll() tutorial. =)

Other than that, I think I know how to do:
/dev/usemaclone open()ing, poll()ing
/dev/usema ioctls:
- UIOCATTACHSEMA
- UIOCBLOCK
- UIOCUNBLOCK

Also, some minor additions to sysirix.c:syssgi().

2 files changed, 29 insertions, 1 deletions

diff --git a/include/asm-mips/shmiq.h b/include/asm-mips/shmiq.h
index 2e845113f..d07633d79 100644
--- a/include/asm-mips/shmiq.h
+++ b/include/asm-mips/shmiq.h
@@ -174,8 +174,10 @@ typedef struct {
 	char *nothing_for_now;
 } idevInfo;
 
+#define IDEV_KEYMAP_NAME_LEN 15
+
 typedef struct {
-        char name [16];
+        char name[IDEV_KEYMAP_NAME_LEN+1];
 } idevKeymapDesc;
 
 #define IDEVINITDEVICE		_IOW('i', 51, unsigned int)
diff --git a/include/asm-mips/usioctl.h b/include/asm-mips/usioctl.h
new file mode 100644
index 000000000..b4edeb5cf
--- /dev/null
+++ b/include/asm-mips/usioctl.h
@@ -0,0 +1,26 @@
+/*
+ * usema/usemaclone-related stuff.
+ *
+ * `Inspired' by IRIX's sys/usioctl.h
+ *
+ * Mike.
+ */
+
+/* ioctls */
+#define UIOC	('u' << 16 | 's' << 8)
+
+#define UIOCATTACHSEMA	(UIOC|2)	/* attach to sema */
+#define UIOCBLOCK	(UIOC|3)	/* block sync "intr"? */
+#define UIOCABLOCK	(UIOC|4)	/* block async */
+#define UIOCNOIBLOCK	(UIOC|5)	/* block sync "intr"?
+					   How is this different from
+					   UIOCNOIBLOCK? */
+#define UIOCUNBLOCK	(UIOC|6)	/* unblock sync */
+#define UIOCAUNBLOCK	(UIOC|7)	/* unblock async */
+#define UIOCINIT	(UIOC|8)	/* init sema (async) */
+
+typedef struct usattach_s {
+  dev_t	us_dev;		/* attach dev */
+  void	*us_handle;	/* userland semaphore handle */
+} usattach_t;
+