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authorRudolf Marek <r.marek@assembler.cz>2011-09-02 23:23:41 +0200
committerStefan Reinauer <stefan.reinauer@coreboot.org>2011-09-07 01:26:47 +0200
commit7f0e93060e720149bb59023d608a67cfc21542b1 (patch)
treea61f1b7a530b517948529506a6dec73e8a4db19c /src/lib
parentf73535c089564864eb92628c351f76b0c556ab91 (diff)
downloadcoreboot-7f0e93060e720149bb59023d608a67cfc21542b1.tar.xz
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>
Diffstat (limited to 'src/lib')
-rw-r--r--src/lib/Makefile.inc1
-rw-r--r--src/lib/trace.c39
-rw-r--r--src/lib/uart8250.c4
3 files changed, 44 insertions, 0 deletions
diff --git a/src/lib/Makefile.inc b/src/lib/Makefile.inc
index 54935cabad..b207ffed66 100644
--- a/src/lib/Makefile.inc
+++ b/src/lib/Makefile.inc
@@ -33,6 +33,7 @@ ramstage-$(CONFIG_CONSOLE_SERIAL8250) += uart8250.c
ramstage-$(CONFIG_CONSOLE_SERIAL8250MEM) += uart8250mem.c
ramstage-$(CONFIG_USBDEBUG) += usbdebug.c
ramstage-$(CONFIG_BOOTSPLASH) += jpeg.c
+ramstage-$(CONFIG_TRACE) += trace.c
driver-$(CONFIG_CONSOLE_NE2K) += ne2k.c
diff --git a/src/lib/trace.c b/src/lib/trace.c
new file mode 100644
index 0000000000..8736c82b65
--- /dev/null
+++ b/src/lib/trace.c
@@ -0,0 +1,39 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2011 Rudolf Marek <r.marek@assembler.cz>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <types.h>
+#include <console/console.h>
+#include <trace.h>
+
+int volatile trace_dis = 0;
+
+void __cyg_profile_func_enter( void *func, void *callsite)
+{
+
+ if (trace_dis)
+ return;
+
+ DISABLE_TRACE
+ printk(BIOS_INFO, "~0x%08x(0x%08x)\n", (uint32_t) func, (uint32_t) callsite);
+ ENABLE_TRACE
+}
+
+void __cyg_profile_func_exit( void *func, void *callsite )
+{
+}
diff --git a/src/lib/uart8250.c b/src/lib/uart8250.c
index e7ddd0bfd5..b2246713ca 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 @@ unsigned char uart8250_rx_byte(unsigned base_port)
void uart8250_init(unsigned base_port, unsigned divisor)
{
+ DISABLE_TRACE;
/* Disable interrupts */
outb(0x0, base_port + UART_IER);
/* Enable FIFOs */
@@ -86,6 +89,7 @@ void uart8250_init(unsigned base_port, unsigned divisor)
/* Set to 3 for 8N1 */
outb(CONFIG_TTYS0_LCS, base_port + UART_LCR);
+ ENABLE_TRACE;
}
void uart_init(void)