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, 8 insertions, 0 deletions

diff --git a/sys/arm/at91/at91.c b/sys/arm/at91/at91.c
index 928faa9..8f9177b 100644
--- a/sys/arm/at91/at91.c
+++ b/sys/arm/at91/at91.c
@@ -314,6 +314,7 @@ struct cpu_devs at91rm9200_devs[] =
 		AT91RM92_BASE + AT91RM92_EMAC_BASE, AT91RM92_EMAC_SIZE,
 		AT91RM92_IRQ_EMAC
 	},
+#ifndef SKYEYE_WORKAROUNDS
 	{
 		"uart", 0,
 		AT91RM92_BASE + AT91RM92_DBGU_BASE, AT91RM92_DBGU_SIZE,
@@ -339,6 +340,13 @@ struct cpu_devs at91rm9200_devs[] =
 		AT91RM92_BASE + AT91RM92_USART3_BASE, AT91RM92_USART_SIZE,
 		AT91RM92_IRQ_USART3
 	},
+#else
+	{
+		"uart", 0,
+		AT91RM92_BASE + AT91RM92_USART0_BASE, AT91RM92_USART_SIZE,
+		AT91RM92_IRQ_USART0
+	},
+#endif
 	{
 		"at91_ssc", 0,
 		AT91RM92_BASE + AT91RM92_SSC0_BASE, AT91RM92_SSC_SIZE,