1 files changed, 69 insertions, 0 deletions
diff --git a/roms/ipxe/src/core/hw.c b/roms/ipxe/src/core/hw.c
new file mode 100644
index 00000000..91736a65
--- /dev/null
+++ b/roms/ipxe/src/core/hw.c
@@ -0,0 +1,69 @@
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <ipxe/refcnt.h>
+#include <ipxe/process.h>
+#include <ipxe/xfer.h>
+#include <ipxe/open.h>
+
+/** @file
+ *
+ * "Hello World" data source
+ *
+ */
+
+struct hw {
+	struct refcnt refcnt;
+	struct interface xfer;
+	struct process process;
+};
+
+static const char hw_msg[] = "Hello world!\n";
+
+static void hw_finished ( struct hw *hw, int rc ) {
+	intf_shutdown ( &hw->xfer, rc );
+	process_del ( &hw->process );
+}
+
+static void hw_step ( struct hw *hw ) {
+	int rc;
+
+	if ( xfer_window ( &hw->xfer ) ) {
+		rc = xfer_deliver_raw ( &hw->xfer, hw_msg, sizeof ( hw_msg ) );
+		hw_finished ( hw, rc );
+	}
+}
+
+static struct interface_operation hw_xfer_operations[] = {
+	INTF_OP ( xfer_window_changed, struct hw *, hw_step ),
+	INTF_OP ( intf_close, struct hw *, hw_finished ),
+};
+
+static struct interface_descriptor hw_xfer_desc =
+	INTF_DESC ( struct hw, xfer, hw_xfer_operations );
+
+static struct process_descriptor hw_process_desc =
+	PROC_DESC_ONCE ( struct hw, process, hw_step );
+
+static int hw_open ( struct interface *xfer, struct uri *uri __unused ) {
+	struct hw *hw;
+
+	/* Allocate and initialise structure */
+	hw = zalloc ( sizeof ( *hw ) );
+	if ( ! hw )
+		return -ENOMEM;
+	ref_init ( &hw->refcnt, NULL );
+	intf_init ( &hw->xfer, &hw_xfer_desc, &hw->refcnt );
+	process_init ( &hw->process, &hw_process_desc, &hw->refcnt );
+
+	/* Attach parent interface, mortalise self, and return */
+	intf_plug_plug ( &hw->xfer, xfer );
+	ref_put ( &hw->refcnt );
+	return 0;
+}
+
+struct uri_opener hw_uri_opener __uri_opener = {
+	.scheme = "hw",
+	.open = hw_open,
+};