4 * This file is part of BeRTOS.
6 * Bertos is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
23 * this file and link it with other files to produce an executable, this
24 * file does not by itself cause the resulting executable to be covered by
25 * the GNU General Public License. This exception does not however
26 * invalidate any other reasons why the executable file might be covered by
27 * the GNU General Public License.
29 * Copyright 2001, 2004 Develer S.r.l. (http://www.develer.com/)
30 * Copyright 1999, 2000, 2001, 2008 Bernie Innocenti <bernie@codewiz.org>
33 * \brief Process scheduler (public interface).
36 * \author Bernie Innocenti <bernie@codewiz.org>
41 #include "cfg/cfg_kern.h"
42 #include <cfg/compiler.h>
49 /* Task scheduling services */
51 struct Process *proc_new_with_name(const char* name, void (*entry)(void), iptr_t data, size_t stacksize, cpustack_t *stack);
53 #if !CONFIG_KERN_MONITOR
54 #define proc_new(entry,data,size,stack) proc_new_with_name(NULL,(entry),(data),(size),(stack))
56 #define proc_new(entry,data,size,stack) proc_new_with_name(#entry,(entry),(data),(size),(stack))
60 void proc_yield(void);
61 #define proc_switch proc_yield /* OBSOLETE */
63 int proc_testSetup(void);
64 int proc_testRun(void);
65 int proc_testTearDown(void);
67 struct Process *proc_current(void);
68 iptr_t proc_current_user_data(void);
69 void proc_rename(struct Process *proc, const char* name);
71 #if CONFIG_KERN_PREEMPT
72 void proc_forbid(void);
73 void proc_permit(void);
75 INLINE void proc_forbid(void) { /* nop */ }
76 INLINE void proc_permit(void) { /* nop */ }
80 * Execute a block of \a CODE atomically with respect to task scheduling.
82 #define PROC_ATOMIC(CODE) \
89 #ifndef CONFIG_PROC_DEFSTACKSIZE
91 #if (ARCH & ARCH_EMUL)
92 /* We need a large stack because system libraries are bloated */
93 #define CONFIG_PROC_DEFSTACKSIZE 65536
96 * Default stack size for each thread, in bytes.
98 * The goal here is to allow a minimal task to save all of its
99 * registers twice, plus push a maximum of 32 variables on the
102 * The actual size computed by the default formula is:
108 * Note that on most 16bit architectures, interrupts will also
109 * run on the stack of the currently running process. Nested
110 * interrupts will greatly increases the amount of stack space
111 * required per process. Use irqmanager to minimize stack
114 #define CONFIG_PROC_DEFSTACKSIZE \
115 (CPU_SAVED_REGS_CNT * 2 * sizeof(cpustack_t) \
120 /* Memory fill codes to help debugging */
121 #if CONFIG_KERN_MONITOR
122 #include <cpu/types.h>
123 #if (SIZEOF_CPUSTACK_T == 1)
124 /* 8bit cpustack_t */
125 #define CONFIG_KERN_STACKFILLCODE 0xA5
126 #define CONFIG_KERN_MEMFILLCODE 0xDB
127 #elif (SIZEOF_CPUSTACK_T == 2)
128 /* 16bit cpustack_t */
129 #define CONFIG_KERN_STACKFILLCODE 0xA5A5
130 #define CONFIG_KERN_MEMFILLCODE 0xDBDB
131 #elif (SIZEOF_CPUSTACK_T == 4)
132 /* 32bit cpustack_t */
133 #define CONFIG_KERN_STACKFILLCODE 0xA5A5A5A5UL
134 #define CONFIG_KERN_MEMFILLCODE 0xDBDBDBDBUL
135 #elif (SIZEOF_CPUSTACK_T == 8)
136 /* 64bit cpustack_t */
137 #define CONFIG_KERN_STACKFILLCODE 0xA5A5A5A5A5A5A5A5ULL
138 #define CONFIG_KERN_MEMFILLCODE 0xDBDBDBDBDBDBDBDBULL
140 #error No cpustack_t size supported!
144 #endif /* KERN_PROC_H */