#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 1024 /**< 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(cpustack_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
- #define CONFIG_KERN_MEMFILLCODE 0xDBDB
+ #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)
+ /* 16bit cpustack_t */
+ #define CONFIG_KERN_STACKFILLCODE 0xA5A5A5A5UL
+ #define CONFIG_KERN_MEMFILLCODE 0xDBDBDBDBUL
+ #else
+ #error No cpustack_t size supported!
+ #endif
#endif