Annotation of prex-old/sys/kern/system.c, Revision 1.1.1.1.2.1
1.1 nbrk 1: /*-
2: * Copyright (c) 2005-2007, Kohsuke Ohtani
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. Neither the name of the author nor the names of any co-contributors
14: * may be used to endorse or promote products derived from this software
15: * without specific prior written permission.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27: * SUCH DAMAGE.
28: */
29:
30: /*
31: * system.c - system services
32: */
33:
34: #include <kernel.h>
35: #include <thread.h>
36: #include <sched.h>
37: #include <task.h>
38: #include <irq.h>
39: #include <page.h>
40: #include <device.h>
41: #include <system.h>
1.1.1.1.2.1! nbrk 42: #include <version.h>
1.1 nbrk 43:
44: /*
45: * kernel information.
46: */
1.1.1.1.2.1! nbrk 47: static const struct info_kernel kern_info = {
! 48: "Prex", VERSION, __DATE__, MACHINE, "preky"
! 49: };
1.1 nbrk 50:
51: /*
52: * Logging system call.
53: *
1.1.1.1.2.1! nbrk 54: * Write a message to the logging device. The log function is
! 55: * available only when kernel is built with debug option.
1.1 nbrk 56: */
57: int
58: sys_log(const char *str)
59: {
60: #ifdef DEBUG
1.1.1.1.2.1! nbrk 61: char buf[DBGMSG_SIZE];
1.1 nbrk 62: size_t len;
63:
1.1.1.1.2.1! nbrk 64: if (umem_strnlen(str, DBGMSG_SIZE, &len))
1.1 nbrk 65: return EFAULT;
1.1.1.1.2.1! nbrk 66: if (len >= DBGMSG_SIZE)
1.1 nbrk 67: return EINVAL;
1.1.1.1.2.1! nbrk 68: if (umem_copyin(str, buf, len + 1))
1.1 nbrk 69: return EFAULT;
1.1.1.1.2.1! nbrk 70: printf(buf);
1.1 nbrk 71: return 0;
72: #else
73: return ENOSYS;
74: #endif
75: }
76:
77: /*
78: * Panic system call.
79: *
1.1.1.1.2.1! nbrk 80: * If kernel is built with debug option, sys_panic() displays
! 81: * a panic message and stops the enture system. Otherwise, it
! 82: * terminates the task which called sys_panic().
1.1 nbrk 83: */
84: int
85: sys_panic(const char *str)
86: {
87: #ifdef DEBUG
1.1.1.1.2.1! nbrk 88: task_t self = cur_task();
! 89:
1.1 nbrk 90: irq_lock();
1.1.1.1.2.1! nbrk 91: printf("\nUser mode panic: task:%s thread:%x\n",
! 92: self->name != NULL ? self->name : "no name", cur_thread);
1.1 nbrk 93:
94: sys_log(str);
1.1.1.1.2.1! nbrk 95: printf("\n");
1.1 nbrk 96:
97: sched_lock();
98: irq_unlock();
99: BREAKPOINT();
100:
101: for (;;);
102: #else
103: task_terminate(cur_task());
104: #endif
105: /* NOTREACHED */
106: return 0;
107: }
108:
109: /*
110: * Get system information
111: */
112: int
113: sys_info(int type, void *buf)
114: {
115: int err = 0;
116: struct info_memory imem;
117: struct info_timer itmr;
118: struct info_thread ithr;
119: struct info_device idev;
120:
121: if (buf == NULL || !user_area(buf))
122: return EFAULT;
123:
124: switch (type) {
125: case INFO_KERNEL:
1.1.1.1.2.1! nbrk 126: err = umem_copyout(&kern_info, buf, sizeof(kern_info));
1.1 nbrk 127: break;
128:
129: case INFO_MEMORY:
130: page_info(&imem.total, &imem.free);
131: err = umem_copyout(&imem, buf, sizeof(imem));
132: break;
133:
134: case INFO_THREAD:
135: if (umem_copyin(buf, &ithr, sizeof(ithr)))
136: return EFAULT;
137: if ((err = thread_info(&ithr)))
138: return err;
139: ithr.cookie++;
140: err = umem_copyout(&ithr, buf, sizeof(ithr));
141: break;
142:
143: case INFO_DEVICE:
144: if (umem_copyin(buf, &idev, sizeof(idev)))
145: return EFAULT;
146: if ((err = device_info(&idev)))
147: return err;
148: idev.cookie++;
149: err = umem_copyout(&idev, buf, sizeof(idev));
150: break;
151:
152: case INFO_TIMER:
153: timer_info(&itmr);
154: err = umem_copyout(&itmr, buf, sizeof(itmr));
155: break;
156:
157: default:
158: err = EINVAL;
1.1.1.1.2.1! nbrk 159: break;
1.1 nbrk 160: }
161: return err;
162: }
163:
164: /*
1.1.1.1.2.1! nbrk 165: * Get system time - return ticks since OS boot.
1.1 nbrk 166: */
167: int
168: sys_time(u_long *ticks)
169: {
170: u_long t;
171:
172: t = timer_count();
1.1.1.1.2.1! nbrk 173: return umem_copyout(&t, ticks, sizeof(t));
1.1 nbrk 174: }
175:
176: /*
177: * Kernel debug service.
178: */
179: int
1.1.1.1.2.1! nbrk 180: sys_debug(int cmd, void *data)
1.1 nbrk 181: {
182: #ifdef DEBUG
183: int err = EINVAL;
184: size_t size;
1.1.1.1.2.1! nbrk 185: int item;
1.1 nbrk 186:
187: switch (cmd) {
188: case DCMD_DUMP:
1.1.1.1.2.1! nbrk 189: if (umem_copyin(data, &item, sizeof(item)))
! 190: err = EFAULT;
! 191: else
! 192: err = debug_dump(item);
1.1 nbrk 193: break;
194: case DCMD_LOGSIZE:
1.1.1.1.2.1! nbrk 195: size = LOGBUF_SIZE;
! 196: err = umem_copyout(&size, data, sizeof(size));
1.1 nbrk 197: break;
198: case DCMD_GETLOG:
1.1.1.1.2.1! nbrk 199: err = debug_getlog(data);
1.1 nbrk 200: break;
201: default:
1.1.1.1.2.1! nbrk 202: /* DO NOTHING */
1.1 nbrk 203: break;
204: }
205: return err;
206: #else
207: return ENOSYS;
208: #endif
209: }
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