Factor out from cfg_kern kernel related default.

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

diff --git a/bertos/kern/proc.h b/bertos/kern/proc.h
index a668c18f4b0b1e3e7273d48b16033d87ee4d1a8f..87fed5e1bbcdae306939c177aea98d25c40e3bae 100644 (file)
--- a/bertos/kern/proc.h
+++ b/bertos/kern/proc.h
@@ -83,4 +83,62 @@ 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
+
+/* OBSOLETE */
+#define CONFIG_KERN_DEFSTACKSIZE CONFIG_PROC_DEFSTACKSIZE
+
+/* 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 */
+