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authorMichael S. Tsirkin <mst@redhat.com>2010-01-10 13:52:41 +0200
committerAnthony Liguori <aliguori@us.ibm.com>2010-01-11 13:40:59 -0600
commitd2364ee424ebf9180afaf21128a71da55321ad00 (patch)
tree519adc359962cf6c269b291a054cbaf2916deb73 /hw/qdev-properties.c
parentc0ced0f3a76c9f3ad680141f751dd1a20c91bbbf (diff)
qdev: add bit property type
This adds "bit" property type, which is a boolean stored in a 32 bit integer field, with legal values on and off. Will be used by virtio for feature bits. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Diffstat (limited to 'hw/qdev-properties.c')
-rw-r--r--hw/qdev-properties.c62
1 files changed, 55 insertions, 7 deletions
diff --git a/hw/qdev-properties.c b/hw/qdev-properties.c
index 217ddc0b74..9e123ae8aa 100644
--- a/hw/qdev-properties.c
+++ b/hw/qdev-properties.c
@@ -9,6 +9,59 @@ void *qdev_get_prop_ptr(DeviceState *dev, Property *prop)
return ptr;
}
+static uint32_t qdev_get_prop_mask(Property *prop)
+{
+ assert(prop->info->type == PROP_TYPE_BIT);
+ return 0x1 << prop->bitnr;
+}
+
+static void bit_prop_set(DeviceState *dev, Property *props, bool val)
+{
+ uint32_t *p = qdev_get_prop_ptr(dev, props);
+ uint32_t mask = qdev_get_prop_mask(props);
+ if (val)
+ *p |= ~mask;
+ else
+ *p &= ~mask;
+}
+
+static void qdev_prop_cpy(DeviceState *dev, Property *props, void *src)
+{
+ if (props->info->type == PROP_TYPE_BIT) {
+ bool *defval = src;
+ bit_prop_set(dev, props, *defval);
+ } else {
+ char *dst = qdev_get_prop_ptr(dev, props);
+ memcpy(dst, src, props->info->size);
+ }
+}
+
+/* Bit */
+static int parse_bit(DeviceState *dev, Property *prop, const char *str)
+{
+ if (!strncasecmp(str, "on", 2))
+ bit_prop_set(dev, prop, true);
+ else if (!strncasecmp(str, "off", 3))
+ bit_prop_set(dev, prop, false);
+ else
+ return -1;
+ return 0;
+}
+
+static int print_bit(DeviceState *dev, Property *prop, char *dest, size_t len)
+{
+ uint8_t *p = qdev_get_prop_ptr(dev, prop);
+ return snprintf(dest, len, (*p & qdev_get_prop_mask(prop)) ? "on" : "off");
+}
+
+PropertyInfo qdev_prop_bit = {
+ .name = "on/off",
+ .type = PROP_TYPE_BIT,
+ .size = sizeof(uint32_t),
+ .parse = parse_bit,
+ .print = print_bit,
+};
+
/* --- 8bit integer --- */
static int parse_uint8(DeviceState *dev, Property *prop, const char *str)
@@ -511,7 +564,6 @@ int qdev_prop_parse(DeviceState *dev, const char *name, const char *value)
void qdev_prop_set(DeviceState *dev, const char *name, void *src, enum PropertyType type)
{
Property *prop;
- void *dst;
prop = qdev_prop_find(dev, name);
if (!prop) {
@@ -524,8 +576,7 @@ void qdev_prop_set(DeviceState *dev, const char *name, void *src, enum PropertyT
__FUNCTION__, dev->info->name, name);
abort();
}
- dst = qdev_get_prop_ptr(dev, prop);
- memcpy(dst, src, prop->info->size);
+ qdev_prop_cpy(dev, prop, src);
}
void qdev_prop_set_uint8(DeviceState *dev, const char *name, uint8_t value)
@@ -585,14 +636,11 @@ void qdev_prop_set_ptr(DeviceState *dev, const char *name, void *value)
void qdev_prop_set_defaults(DeviceState *dev, Property *props)
{
- char *dst;
-
if (!props)
return;
while (props->name) {
if (props->defval) {
- dst = qdev_get_prop_ptr(dev, props);
- memcpy(dst, props->defval, props->info->size);
+ qdev_prop_cpy(dev, props, props->defval);
}
props++;
}