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1 | /* |
1 | /* |
2 | * Copyright (c) 2003 Josef Cejka |
2 | * Copyright (c) 2003 Josef Cejka |
3 | * Copyright (c) 2005 Jakub Jermar |
3 | * Copyright (c) 2005 Jakub Jermar |
4 | * All rights reserved. |
4 | * All rights reserved. |
5 | * |
5 | * |
6 | * Redistribution and use in source and binary forms, with or without |
6 | * Redistribution and use in source and binary forms, with or without |
7 | * modification, are permitted provided that the following conditions |
7 | * modification, are permitted provided that the following conditions |
8 | * are met: |
8 | * are met: |
9 | * |
9 | * |
10 | * - Redistributions of source code must retain the above copyright |
10 | * - Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. |
11 | * notice, this list of conditions and the following disclaimer. |
12 | * - Redistributions in binary form must reproduce the above copyright |
12 | * - Redistributions in binary form must reproduce the above copyright |
13 | * notice, this list of conditions and the following disclaimer in the |
13 | * notice, this list of conditions and the following disclaimer in the |
14 | * documentation and/or other materials provided with the distribution. |
14 | * documentation and/or other materials provided with the distribution. |
15 | * - The name of the author may not be used to endorse or promote products |
15 | * - The name of the author may not be used to endorse or promote products |
16 | * derived from this software without specific prior written permission. |
16 | * derived from this software without specific prior written permission. |
17 | * |
17 | * |
18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
28 | */ |
28 | */ |
29 | 29 | ||
30 | /** @addtogroup genericconsole |
30 | /** @addtogroup genericconsole |
31 | * @{ |
31 | * @{ |
32 | */ |
32 | */ |
33 | /** @file |
33 | /** @file |
34 | */ |
34 | */ |
35 | 35 | ||
36 | #include <console/console.h> |
36 | #include <console/console.h> |
37 | #include <console/chardev.h> |
37 | #include <console/chardev.h> |
- | 38 | #include <sysinfo/sysinfo.h> |
|
38 | #include <synch/waitq.h> |
39 | #include <synch/waitq.h> |
39 | #include <synch/spinlock.h> |
40 | #include <synch/spinlock.h> |
40 | #include <arch/types.h> |
41 | #include <arch/types.h> |
- | 42 | #include <ddi/device.h> |
|
- | 43 | #include <ddi/irq.h> |
|
- | 44 | #include <ddi/ddi.h> |
|
- | 45 | #include <ipc/irq.h> |
|
41 | #include <arch.h> |
46 | #include <arch.h> |
42 | #include <func.h> |
47 | #include <func.h> |
43 | #include <print.h> |
48 | #include <print.h> |
44 | #include <atomic.h> |
49 | #include <atomic.h> |
45 | 50 | ||
- | 51 | #define KLOG_SIZE PAGE_SIZE |
|
46 | #define BUFLEN 2048 |
52 | #define KLOG_LATENCY 8 |
- | 53 | ||
- | 54 | /**< Kernel log cyclic buffer */ |
|
- | 55 | static char klog[KLOG_SIZE] __attribute__ ((aligned (PAGE_SIZE))); |
|
- | 56 | ||
- | 57 | /**< Kernel log initialized */ |
|
47 | static char debug_buffer[BUFLEN]; |
58 | static bool klog_inited = false; |
- | 59 | /**< First kernel log characters */ |
|
- | 60 | static index_t klog_start = 0; |
|
- | 61 | /**< Number of valid kernel log characters */ |
|
48 | static size_t offset = 0; |
62 | static size_t klog_len = 0; |
- | 63 | /**< Number of stored (not printed) kernel log characters */ |
|
- | 64 | static size_t klog_stored = 0; |
|
49 | /** Initialize stdout to something that does not print, but does not fail |
65 | /**< Number of stored kernel log characters for uspace */ |
- | 66 | static size_t klog_uspace = 0; |
|
- | 67 | ||
- | 68 | /**< Kernel log spinlock */ |
|
- | 69 | SPINLOCK_INITIALIZE(klog_lock); |
|
- | 70 | ||
- | 71 | /** Physical memory area used for klog buffer */ |
|
- | 72 | static parea_t klog_parea; |
|
- | 73 | ||
50 | * |
74 | /* |
- | 75 | * For now, we use 0 as INR. |
|
51 | * Save data in some buffer so that it could be retrieved in the debugger |
76 | * However, it is therefore desirable to have architecture specific |
- | 77 | * definition of KLOG_VIRT_INR in the future. |
|
52 | */ |
78 | */ |
53 | static void null_putchar(chardev_t *d, const char ch) |
79 | #define KLOG_VIRT_INR 0 |
54 | { |
80 | |
55 | if (offset >= BUFLEN) |
81 | static irq_t klog_irq; |
56 | offset = 0; |
- | |
57 | debug_buffer[offset++] = ch; |
- | |
58 | } |
- | |
59 | 82 | ||
60 | static chardev_operations_t null_stdout_ops = { |
83 | static chardev_operations_t null_stdout_ops = { |
- | 84 | .suspend = NULL, |
|
- | 85 | .resume = NULL, |
|
61 | .write = null_putchar |
86 | .write = NULL, |
- | 87 | .read = NULL |
|
62 | }; |
88 | }; |
63 | 89 | ||
64 | chardev_t null_stdout = { |
90 | chardev_t null_stdout = { |
65 | .name = "null", |
91 | .name = "null", |
66 | .op = &null_stdout_ops |
92 | .op = &null_stdout_ops |
67 | }; |
93 | }; |
68 | 94 | ||
- | 95 | /** Allways refuse IRQ ownership. |
|
- | 96 | * |
|
- | 97 | * This is not a real IRQ, so we always decline. |
|
- | 98 | * |
|
- | 99 | * @return Always returns IRQ_DECLINE. |
|
- | 100 | */ |
|
- | 101 | static irq_ownership_t klog_claim(void) |
|
- | 102 | { |
|
- | 103 | return IRQ_DECLINE; |
|
- | 104 | } |
|
- | 105 | ||
69 | /** Standard input character device. */ |
106 | /** Standard input character device */ |
70 | chardev_t *stdin = NULL; |
107 | chardev_t *stdin = NULL; |
71 | chardev_t *stdout = &null_stdout; |
108 | chardev_t *stdout = &null_stdout; |
72 | 109 | ||
- | 110 | /** Initialize kernel logging facility |
|
- | 111 | * |
|
- | 112 | * The shared area contains kernel cyclic buffer. Userspace application may |
|
- | 113 | * be notified on new data with indication of position and size |
|
- | 114 | * of the data within the circular buffer. |
|
- | 115 | */ |
|
- | 116 | void klog_init(void) |
|
- | 117 | { |
|
- | 118 | void *faddr = (void *) KA2PA(klog); |
|
- | 119 | ||
- | 120 | ASSERT((uintptr_t) faddr % FRAME_SIZE == 0); |
|
- | 121 | ASSERT(KLOG_SIZE % FRAME_SIZE == 0); |
|
- | 122 | ||
- | 123 | devno_t devno = device_assign_devno(); |
|
- | 124 | ||
- | 125 | klog_parea.pbase = (uintptr_t) faddr; |
|
- | 126 | klog_parea.vbase = (uintptr_t) klog; |
|
- | 127 | klog_parea.frames = SIZE2FRAMES(KLOG_SIZE); |
|
- | 128 | klog_parea.cacheable = true; |
|
- | 129 | ddi_parea_register(&klog_parea); |
|
- | 130 | ||
- | 131 | sysinfo_set_item_val("klog.faddr", NULL, (unative_t) faddr); |
|
- | 132 | sysinfo_set_item_val("klog.pages", NULL, SIZE2FRAMES(KLOG_SIZE)); |
|
- | 133 | sysinfo_set_item_val("klog.devno", NULL, devno); |
|
- | 134 | sysinfo_set_item_val("klog.inr", NULL, KLOG_VIRT_INR); |
|
- | 135 | ||
- | 136 | irq_initialize(&klog_irq); |
|
- | 137 | klog_irq.devno = devno; |
|
- | 138 | klog_irq.inr = KLOG_VIRT_INR; |
|
- | 139 | klog_irq.claim = klog_claim; |
|
- | 140 | irq_register(&klog_irq); |
|
- | 141 | ||
- | 142 | spinlock_lock(&klog_lock); |
|
- | 143 | klog_inited = true; |
|
- | 144 | spinlock_unlock(&klog_lock); |
|
- | 145 | } |
|
- | 146 | ||
73 | /** Get character from character device. Do not echo character. |
147 | /** Get character from character device. Do not echo character. |
74 | * |
148 | * |
75 | * @param chardev Character device. |
149 | * @param chardev Character device. |
76 | * |
150 | * |
77 | * @return Character read. |
151 | * @return Character read. |
78 | */ |
152 | */ |
79 | uint8_t _getc(chardev_t *chardev) |
153 | uint8_t _getc(chardev_t *chardev) |
80 | { |
154 | { |
81 | uint8_t ch; |
155 | uint8_t ch; |
82 | ipl_t ipl; |
156 | ipl_t ipl; |
83 | 157 | ||
84 | if (atomic_get(&haltstate)) { |
158 | if (atomic_get(&haltstate)) { |
85 | /* If we are here, we are hopefully on the processor, that |
159 | /* If we are here, we are hopefully on the processor, that |
86 | * issued the 'halt' command, so proceed to read the character |
160 | * issued the 'halt' command, so proceed to read the character |
87 | * directly from input |
161 | * directly from input |
88 | */ |
162 | */ |
89 | if (chardev->op->read) |
163 | if (chardev->op->read) |
90 | return chardev->op->read(chardev); |
164 | return chardev->op->read(chardev); |
91 | /* no other way of interacting with user, halt */ |
165 | /* no other way of interacting with user, halt */ |
92 | if (CPU) |
166 | if (CPU) |
93 | printf("cpu%d: ", CPU->id); |
167 | printf("cpu%u: ", CPU->id); |
94 | else |
168 | else |
95 | printf("cpu: "); |
169 | printf("cpu: "); |
96 | printf("halted - no kconsole\n"); |
170 | printf("halted - no kconsole\n"); |
97 | cpu_halt(); |
171 | cpu_halt(); |
98 | } |
172 | } |
99 | 173 | ||
100 | waitq_sleep(&chardev->wq); |
174 | waitq_sleep(&chardev->wq); |
101 | ipl = interrupts_disable(); |
175 | ipl = interrupts_disable(); |
102 | spinlock_lock(&chardev->lock); |
176 | spinlock_lock(&chardev->lock); |
103 | ch = chardev->buffer[(chardev->index - chardev->counter) % CHARDEV_BUFLEN]; |
177 | ch = chardev->buffer[(chardev->index - chardev->counter) % CHARDEV_BUFLEN]; |
104 | chardev->counter--; |
178 | chardev->counter--; |
105 | spinlock_unlock(&chardev->lock); |
179 | spinlock_unlock(&chardev->lock); |
106 | interrupts_restore(ipl); |
180 | interrupts_restore(ipl); |
107 | 181 | ||
108 | chardev->op->resume(chardev); |
182 | chardev->op->resume(chardev); |
109 | 183 | ||
110 | return ch; |
184 | return ch; |
111 | } |
185 | } |
112 | 186 | ||
113 | /** Get string from character device. |
187 | /** Get string from character device. |
114 | * |
188 | * |
115 | * Read characters from character device until first occurrence |
189 | * Read characters from character device until first occurrence |
116 | * of newline character. |
190 | * of newline character. |
117 | * |
191 | * |
118 | * @param chardev Character device. |
192 | * @param chardev Character device. |
119 | * @param buf Buffer where to store string terminated by '\0'. |
193 | * @param buf Buffer where to store string terminated by '\0'. |
120 | * @param buflen Size of the buffer. |
194 | * @param buflen Size of the buffer. |
121 | * |
195 | * |
122 | * @return Number of characters read. |
196 | * @return Number of characters read. |
123 | */ |
197 | */ |
124 | count_t gets(chardev_t *chardev, char *buf, size_t buflen) |
198 | count_t gets(chardev_t *chardev, char *buf, size_t buflen) |
125 | { |
199 | { |
126 | index_t index = 0; |
200 | index_t index = 0; |
127 | char ch; |
201 | char ch; |
128 | 202 | ||
129 | while (index < buflen) { |
203 | while (index < buflen) { |
130 | ch = _getc(chardev); |
204 | ch = _getc(chardev); |
131 | if (ch == '\b') { |
205 | if (ch == '\b') { |
132 | if (index > 0) { |
206 | if (index > 0) { |
133 | index--; |
207 | index--; |
134 | /* Space backspace, space */ |
208 | /* Space backspace, space */ |
135 | putchar('\b'); |
209 | putchar('\b'); |
136 | putchar(' '); |
210 | putchar(' '); |
137 | putchar('\b'); |
211 | putchar('\b'); |
138 | } |
212 | } |
139 | continue; |
213 | continue; |
140 | } |
214 | } |
141 | putchar(ch); |
215 | putchar(ch); |
142 | 216 | ||
143 | if (ch == '\n') { /* end of string => write 0, return */ |
217 | if (ch == '\n') { /* end of string => write 0, return */ |
144 | buf[index] = '\0'; |
218 | buf[index] = '\0'; |
145 | return (count_t) index; |
219 | return (count_t) index; |
146 | } |
220 | } |
147 | buf[index++] = ch; |
221 | buf[index++] = ch; |
148 | } |
222 | } |
149 | return (count_t) index; |
223 | return (count_t) index; |
150 | } |
224 | } |
151 | 225 | ||
152 | /** Get character from device & echo it to screen */ |
226 | /** Get character from device & echo it to screen */ |
153 | uint8_t getc(chardev_t *chardev) |
227 | uint8_t getc(chardev_t *chardev) |
154 | { |
228 | { |
155 | uint8_t ch; |
229 | uint8_t ch; |
156 | 230 | ||
157 | ch = _getc(chardev); |
231 | ch = _getc(chardev); |
158 | putchar(ch); |
232 | putchar(ch); |
159 | return ch; |
233 | return ch; |
160 | } |
234 | } |
161 | 235 | ||
- | 236 | void klog_update(void) |
|
- | 237 | { |
|
- | 238 | spinlock_lock(&klog_lock); |
|
- | 239 | ||
- | 240 | if ((klog_inited) && (klog_irq.notif_cfg.notify) && (klog_uspace > 0)) { |
|
- | 241 | ipc_irq_send_msg_3(&klog_irq, klog_start, klog_len, klog_uspace); |
|
- | 242 | klog_uspace = 0; |
|
- | 243 | } |
|
- | 244 | ||
- | 245 | spinlock_unlock(&klog_lock); |
|
- | 246 | } |
|
- | 247 | ||
162 | void putchar(char c) |
248 | void putchar(char c) |
163 | { |
249 | { |
- | 250 | spinlock_lock(&klog_lock); |
|
- | 251 | ||
- | 252 | if ((klog_stored > 0) && (stdout->op->write)) { |
|
- | 253 | /* Print charaters stored in kernel log */ |
|
- | 254 | index_t i; |
|
- | 255 | for (i = klog_len - klog_stored; i < klog_len; i++) |
|
- | 256 | stdout->op->write(stdout, klog[(klog_start + i) % KLOG_SIZE]); |
|
- | 257 | klog_stored = 0; |
|
- | 258 | } |
|
- | 259 | ||
- | 260 | /* Store character in the cyclic kernel log */ |
|
- | 261 | klog[(klog_start + klog_len) % KLOG_SIZE] = c; |
|
- | 262 | if (klog_len < KLOG_SIZE) |
|
- | 263 | klog_len++; |
|
- | 264 | else |
|
- | 265 | klog_start = (klog_start + 1) % KLOG_SIZE; |
|
- | 266 | ||
164 | if (stdout->op->write) |
267 | if (stdout->op->write) |
165 | stdout->op->write(stdout, c); |
268 | stdout->op->write(stdout, c); |
- | 269 | else { |
|
- | 270 | /* The character is just in the kernel log */ |
|
- | 271 | if (klog_stored < klog_len) |
|
- | 272 | klog_stored++; |
|
- | 273 | } |
|
- | 274 | ||
- | 275 | /* The character is stored for uspace */ |
|
- | 276 | if (klog_uspace < klog_len) |
|
- | 277 | klog_uspace++; |
|
- | 278 | ||
- | 279 | /* Check notify uspace to update */ |
|
- | 280 | bool update; |
|
- | 281 | if ((klog_uspace > KLOG_LATENCY) || (c == '\n')) |
|
- | 282 | update = true; |
|
- | 283 | else |
|
- | 284 | update = false; |
|
- | 285 | ||
- | 286 | spinlock_unlock(&klog_lock); |
|
- | 287 | ||
- | 288 | if (update) |
|
- | 289 | klog_update(); |
|
166 | } |
290 | } |
167 | 291 | ||
168 | /** @} |
292 | /** @} |
169 | */ |
293 | */ |
170 | 294 |