Add TUNABLE_LONG and TUNABLE_ULONG, and use the latter for the

hw.pci.host_mem_start tunable.  Add comments to TUNABLE_INT and
TUNABLE_QUAD recommending against their use.

MFC after:	3 weeks

1 files changed, 46 insertions, 0 deletions

diff --git a/sys/kern/kern_environment.c b/sys/kern/kern_environment.c
index 96b57d9..7f88adc 100644
--- a/sys/kern/kern_environment.c
+++ b/sys/kern/kern_environment.c
@@ -415,6 +415,36 @@ getenv_int(const char *name, int *data)
 }
 
 /*
+ * Return a long value from an environment variable.
+ */
+long
+getenv_long(const char *name, long *data)
+{
+	quad_t tmp;
+	long rval;
+
+	rval = getenv_quad(name, &tmp);
+	if (rval)
+		*data = (long) tmp;
+	return (rval);
+}
+
+/*
+ * Return an unsigned long value from an environment variable.
+ */
+unsigned long
+getenv_ulong(const char *name, unsigned long *data)
+{
+	quad_t tmp;
+	long rval;
+
+	rval = getenv_quad(name, &tmp);
+	if (rval)
+		*data = (unsigned long) tmp;
+	return (rval);
+}
+
+/*
  * Return a quad_t value from an environment variable.
  */
 int
@@ -464,6 +494,22 @@ tunable_int_init(void *data)
 }
 
 void
+tunable_long_init(void *data)
+{
+	struct tunable_long *d = (struct tunable_long *)data;
+
+	TUNABLE_LONG_FETCH(d->path, d->var);
+}
+
+void
+tunable_ulong_init(void *data)
+{
+	struct tunable_ulong *d = (struct tunable_ulong *)data;
+
+	TUNABLE_ULONG_FETCH(d->path, d->var);
+}
+
+void
 tunable_quad_init(void *data)
 {
 	struct tunable_quad *d = (struct tunable_quad *)data;