X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=config_kern.h;h=c703b4def2006b2d058d81fa395e9c0a1e48af6b;hb=ed26a0ef9ec8c88da40cb76ae9594786ba6e71da;hp=e5cc71cb077bf3512154112899381e1613a57798;hpb=0ace0d776cdbb34ed7f4aaa0815d4e2dd46fcec7;p=bertos.git

diff --git a/config_kern.h b/config_kern.h
index e5cc71cb..c703b4de 100644
--- a/config_kern.h
+++ b/config_kern.h
@@ -97,15 +97,58 @@
 #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
+	#elif (SIZEOF_CPUSTACK_T == 8)
+		/* 16bit cpustack_t */
+		#define CONFIG_KERN_STACKFILLCODE  0xA5A5A5A5A5A5A5A5UL
+		#define CONFIG_KERN_MEMFILLCODE    0xDBDBDBDBDBDBDBDBUL
+	#else
+		#error No cpustack_t size supported!
+	#endif
 #endif