Resurrect Skyeye support :

Add a new option, SKYEYE_WORKAROUNDS, which as the name suggests adds
workarounds for things skyeye doesn't simulate. Specifically :
- Use USART0 instead of DBGU as the console, make it not use DMA, and           manually provoke an interrupt when we're done in the transmit function.
- Skyeye maintains an internal counter for clock, but apparently there's
no way to access it, so hack the timecounter code to return a value which
is increased at every clock interrupts. This is gross, but I didn't find a
better way to implement timecounters without hacking Skyeye to get the
counter value.
- Force the write-back of PTEs once we're done writing them, even if they
are supposed to be write-through. I don't know why I have to do that.

1 files changed, 5 insertions, 7 deletions

diff --git a/sys/arm/at91/uart_bus_at91usart.c b/sys/arm/at91/uart_bus_at91usart.c
index c9ab85c..af1773b 100644
--- a/sys/arm/at91/uart_bus_at91usart.c
+++ b/sys/arm/at91/uart_bus_at91usart.c
@@ -76,22 +76,20 @@ usart_at91rm92_probe(device_t dev)
 	switch (device_get_unit(dev))
 	{
 	case 0:
+#ifdef SKYEYE_WORKAROUNDS
+		device_set_desc(dev, "USART0");
+#else
 		device_set_desc(dev, "DBGU");
-#ifndef USART0_CONSOLE
+#endif
 		/*
 		 * Setting sc_sysdev makes this device a 'system device' and
 		 * indirectly makes it the system console.
 		 */
 		sc->sc_sysdev = SLIST_FIRST(&uart_sysdevs);
 		bcopy(&sc->sc_sysdev->bas, &sc->sc_bas, sizeof(sc->sc_bas));
-#endif
 		break;
 	case 1:
 		device_set_desc(dev, "USART0");
-#ifdef USART0_CONSOLE
-		sc->sc_sysdev = SLIST_FIRST(&uart_sysdevs);
-		bcopy(&sc->sc_sysdev->bas, &sc->sc_bas, sizeof(sc->sc_bas));
-#endif
 		break;
 	case 2:
 		device_set_desc(dev, "USART1");
@@ -104,7 +102,7 @@ usart_at91rm92_probe(device_t dev)
 		break;
 	}
 	sc->sc_class = &at91_usart_class;
-	return (uart_bus_probe(dev, 0, 0, 0, 0));
+	return (uart_bus_probe(dev, 0, 0, 0, device_get_unit(dev)));
 }