From 8e9b1ada815064b18774695225d12986bc36bb10 Mon Sep 17 00:00:00 2001
From: asterix <asterix@38d2e660-2303-0410-9eaa-f027e97ec537>
Date: Wed, 12 May 2010 14:08:30 +0000
Subject: [PATCH] Add switch context module.

git-svn-id: https://src.develer.com/svnoss/bertos/trunk@3664 38d2e660-2303-0410-9eaa-f027e97ec537
---
 bertos/benchmark/context_switch.c | 135 ++++++++++++++++++++++++++++++
 bertos/benchmark/context_switch.h |  49 +++++++++++
 bertos/cfg/cfg_context_switch.h   |  69 +++++++++++++++
 3 files changed, 253 insertions(+)
 create mode 100644 bertos/benchmark/context_switch.c
 create mode 100644 bertos/benchmark/context_switch.h
 create mode 100644 bertos/cfg/cfg_context_switch.h

diff --git a/bertos/benchmark/context_switch.c b/bertos/benchmark/context_switch.c
new file mode 100644
index 00000000..92d9d9dc
--- /dev/null
+++ b/bertos/benchmark/context_switch.c
@@ -0,0 +1,135 @@
+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2010 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \brief Context switch benchmark
+ *
+ * \author Andrea Righi <arighi@develer.com>
+ * \author Daniele Basiele <asterix@develer.com>
+ */
+
+#include "context_switch.h"
+
+#include "hw/hw_led.h"
+
+#include "cfg/cfg_context_switch.h"
+#include <cfg/debug.h>
+
+#include <cpu/irq.h>
+#include <cpu/power.h>
+
+#include <drv/timer.h>
+#include <drv/ser.h>
+
+#include <kern/proc.h>
+
+#define PROC_STACK_SIZE	   1024
+
+static PROC_DEFINE_STACK(hp_stack, PROC_STACK_SIZE);
+static PROC_DEFINE_STACK(lp_stack, PROC_STACK_SIZE);
+
+static Process *hp_proc, *lp_proc, *main_proc;
+Serial out;
+
+#if CONFIG_USE_HP_TIMER
+
+static hptime_t start, end;
+
+#endif
+
+static void NORETURN hp_process(void)
+{
+	proc_setPri(hp_proc, 2);
+
+	while (1)
+	{
+		sig_wait(SIG_USER0);
+		#if CONFIG_USE_HP_TIMER
+			end = timer_clock_hp();
+		#endif
+		#if CONFIG_USE_LED
+			LED_ON();
+		#endif
+		timer_delay(100);
+		sig_send(main_proc, SIG_USER1);
+	}
+}
+
+static void NORETURN lp_process(void)
+{
+	proc_setPri(lp_proc, 1);
+
+	while (1)
+	{
+		sig_wait(SIG_USER1);
+		#if CONFIG_USE_HP_TIMER
+			start = timer_clock_hp();
+		#endif
+		#if CONFIG_USE_LED
+			LED_ON();
+			LED_OFF();
+		#endif
+
+		sig_send(hp_proc, SIG_USER0);
+	}
+}
+
+
+void NORETURN context_switch(void)
+{
+	IRQ_ENABLE;
+	timer_init();
+	proc_init();
+
+	ser_init(&out, CONFIG_CTX_DEBUG_PORT);
+	ser_setbaudrate(&out, CONFIG_CTX_DEBUG_BAUDRATE);
+
+	#if CONFIG_USE_LED
+		LED_INIT();
+	#endif
+
+	hp_proc = proc_new(hp_process, NULL, PROC_STACK_SIZE, hp_stack);
+	lp_proc = proc_new(lp_process, NULL, PROC_STACK_SIZE, lp_stack);
+	main_proc = proc_current();
+
+	while (1)
+	{
+		#if CONFIG_USE_HP_TIMER
+			kfile_printf(&out.fd, "Switch: %lu.%lu usec\n",
+							hptime_to_us((end - start)),
+							hptime_to_us((end - start) * 1000) % 1000);
+		#endif
+
+		sig_send(lp_proc, SIG_USER1);
+		sig_wait(SIG_USER1);
+	}
+
+}
diff --git a/bertos/benchmark/context_switch.h b/bertos/benchmark/context_switch.h
new file mode 100644
index 00000000..e17921ae
--- /dev/null
+++ b/bertos/benchmark/context_switch.h
@@ -0,0 +1,49 @@
+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2010 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \brief Context switch benchmark
+ *
+ * \author Andrea Righi <arighi@develer.com>
+ * \author Daniele Basiele <asterix@develer.com>
+ *
+ * $WIZ$ module_name = "context_switch"
+ * $WIZ$ module_depends = "kfile", "kern", "signal", "timer", "ser"
+ * $WIZ$ module_configuration = "bertos/cfg/cfg_context_switch.h"
+ * $WIZ$ module_hw = "bertos/hw/hw_led.h"
+ */
+
+#ifndef BENCHMARK_CONTEXT_SWITCH_H
+#define BENCHMARK_CONTEXT_SWITCH_H
+
+void context_switch(void);
+
+#endif /* BENCHMARK_CONTEXT_SWITCH_H */
diff --git a/bertos/cfg/cfg_context_switch.h b/bertos/cfg/cfg_context_switch.h
new file mode 100644
index 00000000..05386929
--- /dev/null
+++ b/bertos/cfg/cfg_context_switch.h
@@ -0,0 +1,69 @@
+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2010 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \brief Configuration file for the context switch benchmark.
+ *
+ * \author Daniele Basile <asterix@develer.com>
+ */
+
+#ifndef CFG_CONTEXT_SWITCH_H
+#define CFG_CONTEXT_SWITCH_H
+
+/**
+ * Use hp timer for the bechmark.
+ *
+ * $WIZ$ type = "boolean"
+ */
+#define CONFIG_USE_HP_TIMER       1
+
+
+/**
+ * Use board led for benchmark.
+ *
+ * $WIZ$ type = "boolean"
+ */
+#define CONFIG_USE_LED       1
+
+
+/**
+ * Debug console port.
+ * $WIZ$ type = "int"; min = 0
+ */
+#define CONFIG_CTX_DEBUG_PORT 0
+
+/**
+ * Baudrate for the debug console.
+ * $WIZ$ type = "int"; min = 300
+ */
+#define CONFIG_CTX_DEBUG_BAUDRATE  115200UL
+
+#endif /* CFG_CONTEXT_SWITCH_H */
-- 
2.25.1