X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=kitten%2Fdrivers%2Fconsole%2Frcal0.c;fp=kitten%2Fdrivers%2Fconsole%2Frcal0.c;h=09af433b1ba09ad0d4fe6e0f0178b6a7bb09a846;hb=66a1a4c7a9edcd7d8bc207aca093d694a6e6b5b2;hp=0000000000000000000000000000000000000000;hpb=f7cf9c19ecb0a589dd45ae0d2c91814bd3c2acc2;p=palacios.git

diff --git a/kitten/drivers/console/rcal0.c b/kitten/drivers/console/rcal0.c
new file mode 100644
index 0000000..09af433
--- /dev/null
+++ b/kitten/drivers/console/rcal0.c
@@ -0,0 +1,89 @@
+#include <lwk/driver.h>
+#include <lwk/console.h>
+#include <lwk/string.h>
+#include <lwk/delay.h>
+#include <rca/rca_l0.h>
+
+/** Template event heder with static fields filled in. */
+static rs_event_t ev_hdr = {0};
+
+/** Set when L0 console has been initialized. */
+static int initialized = 0;
+
+/**
+ * Writes a message to the Cray L0 console.
+ */
+static void l0_write(struct console *con, const char *str)
+{
+	int ret = 0;
+	unsigned int n = strlen(str);
+
+	while (n) {
+		if ((ret =
+			ch_send_data(L0RCA_CH_CON_UP, &ev_hdr, (void *)str, n))
+		     <= 0)
+		{
+			/* either error or we are done */
+			break;
+		}
+
+		if (n > ret) {
+			/* some bytes were sent, point to the remaining data */
+			str += (n - ret);
+			n = ret;
+		}
+
+		/* busy wait if the buf is full */
+                udelay(1000);
+	}
+
+	/* if error, give up and spin forever */
+	if (ret < 0)
+		while (1) {}
+
+	return;
+}
+
+/**
+ * Cray L0 console device.
+ */
+static struct console l0_console = {
+	.name  = "Cray RCA L0 Console",
+	.write = l0_write
+};
+
+/**
+ * Initializes the Cray XT L0 console.
+ */
+void l0_console_init(void)
+{
+	if (initialized) {
+		printk(KERN_ERR "RCA L0 console already initialized.\n");
+		return;
+	}
+
+	/* Read the configuration information provided by the L0 */
+	l0rca_init_config();
+
+	/* Setup the event template to use for outgoing events */
+	ev_hdr.ev_id		=	ec_console_log;
+	ev_hdr.ev_gen		=	RCA_MKSVC(
+						RCA_INST_ANY,
+						RCA_SVCTYPE_CONS,
+						l0rca_get_proc_id()
+					);
+	ev_hdr.ev_src		=	ev_hdr.ev_gen;
+	ev_hdr.ev_priority	=	RCA_LOG_DEBUG;
+	ev_hdr.ev_flag		=	0;
+	/* Timestamp, len & data is filled at the time of sending event */
+	
+	/* Register with the Cray RCA subsystem */
+	register_ch_up(L0RCA_CH_CON_UP, NULL, 0, -1);
+
+	/* Register the L0 console with the LWK */
+	console_register(&l0_console);
+	initialized = 1;
+}
+
+driver_init(l0_console_init);
+