X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=config_kern.h;h=1edbabe9dc389952ec577edca23635638efd86b9;hb=70fbca7abd15ab931dc82119f5b0b8f7b3fe1596;hp=06779c27685d37de73f9c9c30f6efa2f5488e483;hpb=bcf38f772b397e7a8ba781a69aacb9380e54b32a;p=bertos.git

diff --git a/config_kern.h b/config_kern.h
old mode 100755
new mode 100644
index 06779c27..1edbabe9
--- a/config_kern.h
+++ b/config_kern.h
@@ -1,9 +1,34 @@
 /**
  * \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 2001,2004 Develer S.r.l. (http://www.develer.com/)
  * Copyright 1999,2000,2001 Bernardo Innocenti <bernie@develer.com>
- * This file is part of DevLib - See README.devlib for information.
+ *
  * -->
  *
  * \brief Kernel configuration parameters
@@ -72,11 +97,36 @@
 #define CONFIG_KERN_QUANTUM     50    /**< Time sharing quantum in timer ticks. */
 
 #if (ARCH & ARCH_EMUL)
-	#define CONFIG_KERN_DEFSTACKSIZE  65536
+	/* We need a large stack because system libraries are bloated */
+	#define CONFIG_PROC_DEFSTACKSIZE  65536
 #else
-	#define CONFIG_KERN_DEFSTACKSIZE  128  /**< Default stack size for each thread. */
+	/**
+	 * Default stack size for each thread, in bytes.
+	 *
+	 * The goal here is to allow a minimal task to save all of its
+	 * registers twice, plus push a maximum of 32 variables on the
+	 * stack.
+	 *
+	 * The actual size computed by the default formula is:
+	 *   AVR:    102
+	 *   i386:   156
+	 *   ARM:    164
+	 *   x86_64: 184
+	 *
+	 * Note that on most 16bit architectures, interrupts will also
+	 * run on the stack of the currently running process.  Nested
+	 * interrupts will greatly increases the amount of stack space
+	 * required per process.  Use irqmanager to minimize stack
+	 * usage.
+	 */
+	#define CONFIG_PROC_DEFSTACKSIZE  \
+	    (CPU_SAVED_REGS_CNT * 2 * sizeof(cpu_stack_t) \
+	    + 32 * sizeof(int))
 #endif
 
+/* OBSOLETE */
+#define CONFIG_KERN_DEFSTACKSIZE CONFIG_PROC_DEFSTACKSIZE
+
 /* Memory fill codes to help debugging */
 #if CONFIG_KERN_MONITOR
 	#define CONFIG_KERN_STACKFILLCODE  0xA5A5