monitor_checkStack(): simplify and fix the degenerate case sp_size == 0

[bertos.git] / bertos / kern / proc.h

diff --git a/bertos/kern/proc.h b/bertos/kern/proc.h
index d6109e35da4211e20c1387ff9ef04bb986518504..482fb7a39708f3a1193f1e0b2689322dded7bbbe 100644 (file)
--- a/bertos/kern/proc.h
+++ b/bertos/kern/proc.h
@@ -26,21 +26,19 @@
  * 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>
- *
+ * Copyright 2001, 2004 Develer S.r.l. (http://www.develer.com/)
+ * Copyright 1999, 2000, 2001, 2008 Bernie Innocenti <bernie@codewiz.org>
  * -->
  *
  * \brief Process scheduler (public interface).
  *
  * \version $Id$
- *
- * \author Bernardo Innocenti <bernie@develer.com>
+ * \author Bernie Innocenti <bernie@codewiz.org>
  */
 #ifndef KERN_PROC_H
 #define KERN_PROC_H
 
-#include <cfg/cfg_kern.h>
+#include "cfg/cfg_kern.h"
 #include <cfg/compiler.h>
 
 #include <cpu/irq.h>
@@ -59,13 +57,18 @@ struct Process *proc_new_with_name(const char* name, void (*entry)(void), iptr_t
 #endif
 
 void proc_exit(void);
-void proc_switch(void);
-void proc_test(void);
+void proc_yield(void);
+#define proc_switch proc_yield /* OBSOLETE */
+
+int proc_testSetup(void);
+int proc_testRun(void);
+int proc_testTearDown(void);
+
 struct Process *proc_current(void);
 iptr_t proc_current_user_data(void);
 void proc_rename(struct Process *proc, const char* name);
 
-#if CONFIG_KERN_PREEMPTIVE
+#if CONFIG_KERN_PREEMPT
        void proc_forbid(void);
        void proc_permit(void);
 #else
@@ -83,4 +86,59 @@ void proc_rename(struct Process *proc, const char* name);
                proc_permit(); \
        } while(0)
 
+#ifndef CONFIG_PROC_DEFSTACKSIZE
+
+       #if (ARCH & ARCH_EMUL)
+               /* We need a large stack because system libraries are bloated */
+               #define CONFIG_PROC_DEFSTACKSIZE  65536
+       #else
+               /**
+                * 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(cpustack_t) \
+                   + 32 * sizeof(int))
+       #endif
+#endif
+
+/* Memory fill codes to help debugging */
+#if CONFIG_KERN_MONITOR
+       #include <cpu/types.h>
+       #if (SIZEOF_CPUSTACK_T == 1)
+               /* 8bit cpustack_t */
+               #define CONFIG_KERN_STACKFILLCODE  0xA5
+               #define CONFIG_KERN_MEMFILLCODE    0xDB
+       #elif (SIZEOF_CPUSTACK_T == 2)
+               /* 16bit cpustack_t */
+               #define CONFIG_KERN_STACKFILLCODE  0xA5A5
+               #define CONFIG_KERN_MEMFILLCODE    0xDBDB
+       #elif (SIZEOF_CPUSTACK_T == 4)
+               /* 32bit cpustack_t */
+               #define CONFIG_KERN_STACKFILLCODE  0xA5A5A5A5UL
+               #define CONFIG_KERN_MEMFILLCODE    0xDBDBDBDBUL
+       #elif (SIZEOF_CPUSTACK_T == 8)
+               /* 64bit cpustack_t */
+               #define CONFIG_KERN_STACKFILLCODE  0xA5A5A5A5A5A5A5A5ULL
+               #define CONFIG_KERN_MEMFILLCODE    0xDBDBDBDBDBDBDBDBULL
+       #else
+               #error No cpustack_t size supported!
+       #endif
+#endif
+
 #endif /* KERN_PROC_H */