Add support for the tracing infastructure in coreboot.
The compiler is forced to emmit special functions on every
entry/exit of the function. Add a compile time option
to support it. Function entries will be printed in
the console. The CONFIG_TRACE has more documentation.
Patch for userspace tools will follow.
Change-Id: I2cbeb3f104892b034c8756f86ed05bf71187c3f3
Signed-off-by: Rudolf Marek <r.marek@assembler.cz>
Reviewed-on: http://review.coreboot.org/178
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/src/lib/uart8250.c b/src/lib/uart8250.c
index e7ddd0b..b224671 100644
--- a/src/lib/uart8250.c
+++ b/src/lib/uart8250.c
@@ -21,6 +21,8 @@
#include <arch/io.h>
#include <uart8250.h>
#include <pc80/mc146818rtc.h>
+#include <trace.h>
+
#if CONFIG_USE_OPTION_TABLE
#include "option_table.h"
#endif
@@ -69,6 +71,7 @@
void uart8250_init(unsigned base_port, unsigned divisor)
{
+ DISABLE_TRACE;
/* Disable interrupts */
outb(0x0, base_port + UART_IER);
/* Enable FIFOs */
@@ -86,6 +89,7 @@
/* Set to 3 for 8N1 */
outb(CONFIG_TTYS0_LCS, base_port + UART_LCR);
+ ENABLE_TRACE;
}
void uart_init(void)