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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 <sysinfo/sysinfo.h> |
39 | #include <synch/waitq.h> |
39 | #include <synch/waitq.h> |
40 | #include <synch/spinlock.h> |
40 | #include <synch/spinlock.h> |
41 | #include <arch/types.h> |
41 | #include <arch/types.h> |
42 | #include <ddi/device.h> |
42 | #include <ddi/device.h> |
43 | #include <ddi/irq.h> |
43 | #include <ddi/irq.h> |
44 | #include <ddi/ddi.h> |
44 | #include <ddi/ddi.h> |
45 | #include <ipc/irq.h> |
45 | #include <ipc/irq.h> |
46 | #include <arch.h> |
46 | #include <arch.h> |
47 | #include <func.h> |
47 | #include <func.h> |
48 | #include <print.h> |
48 | #include <print.h> |
49 | #include <atomic.h> |
49 | #include <atomic.h> |
50 | 50 | ||
51 | #define KLOG_SIZE PAGE_SIZE |
51 | #define KLOG_SIZE PAGE_SIZE |
52 | #define KLOG_LATENCY 8 |
52 | #define KLOG_LATENCY 8 |
53 | 53 | ||
54 | /**< Kernel log cyclic buffer */ |
54 | /**< Kernel log cyclic buffer */ |
55 | static char klog[KLOG_SIZE] __attribute__ ((aligned (PAGE_SIZE))); |
55 | static char klog[KLOG_SIZE] __attribute__ ((aligned (PAGE_SIZE))); |
56 | 56 | ||
57 | /**< Kernel log initialized */ |
57 | /**< Kernel log initialized */ |
58 | static bool klog_inited = false; |
58 | static bool klog_inited = false; |
59 | /**< First kernel log characters */ |
59 | /**< First kernel log characters */ |
60 | static index_t klog_start = 0; |
60 | static index_t klog_start = 0; |
61 | /**< Number of valid kernel log characters */ |
61 | /**< Number of valid kernel log characters */ |
62 | static size_t klog_len = 0; |
62 | static size_t klog_len = 0; |
63 | /**< Number of stored (not printed) kernel log characters */ |
63 | /**< Number of stored (not printed) kernel log characters */ |
64 | static size_t klog_stored = 0; |
64 | static size_t klog_stored = 0; |
65 | /**< Number of stored kernel log characters for uspace */ |
65 | /**< Number of stored kernel log characters for uspace */ |
66 | static size_t klog_uspace = 0; |
66 | static size_t klog_uspace = 0; |
67 | 67 | ||
68 | /**< Silent output */ |
68 | /**< Silent output */ |
69 | static bool silent = false; |
69 | static bool silent = false; |
70 | 70 | ||
71 | /**< Kernel log spinlock */ |
71 | /**< Kernel log spinlock */ |
72 | SPINLOCK_INITIALIZE(klog_lock); |
72 | SPINLOCK_INITIALIZE(klog_lock); |
73 | 73 | ||
74 | /** Physical memory area used for klog buffer */ |
74 | /** Physical memory area used for klog buffer */ |
75 | static parea_t klog_parea; |
75 | static parea_t klog_parea; |
76 | 76 | ||
77 | /* |
77 | /* |
78 | * For now, we use 0 as INR. |
78 | * For now, we use 0 as INR. |
79 | * However, it is therefore desirable to have architecture specific |
79 | * However, it is therefore desirable to have architecture specific |
80 | * definition of KLOG_VIRT_INR in the future. |
80 | * definition of KLOG_VIRT_INR in the future. |
81 | */ |
81 | */ |
82 | #define KLOG_VIRT_INR 0 |
82 | #define KLOG_VIRT_INR 0 |
83 | 83 | ||
84 | static irq_t klog_irq; |
84 | static irq_t klog_irq; |
85 | 85 | ||
86 | static chardev_operations_t null_stdout_ops = { |
86 | static chardev_operations_t null_stdout_ops = { |
87 | .suspend = NULL, |
87 | .suspend = NULL, |
88 | .resume = NULL, |
88 | .resume = NULL, |
89 | .write = NULL, |
89 | .write = NULL, |
90 | .read = NULL |
90 | .read = NULL |
91 | }; |
91 | }; |
92 | 92 | ||
93 | chardev_t null_stdout = { |
93 | chardev_t null_stdout = { |
94 | .name = "null", |
94 | .name = "null", |
95 | .op = &null_stdout_ops |
95 | .op = &null_stdout_ops |
96 | }; |
96 | }; |
97 | 97 | ||
98 | /** Allways refuse IRQ ownership. |
98 | /** Allways refuse IRQ ownership. |
99 | * |
99 | * |
100 | * This is not a real IRQ, so we always decline. |
100 | * This is not a real IRQ, so we always decline. |
101 | * |
101 | * |
102 | * @return Always returns IRQ_DECLINE. |
102 | * @return Always returns IRQ_DECLINE. |
103 | */ |
103 | */ |
104 | static irq_ownership_t klog_claim(void *instance) |
104 | static irq_ownership_t klog_claim(irq_t *irq) |
105 | { |
105 | { |
106 | return IRQ_DECLINE; |
106 | return IRQ_DECLINE; |
107 | } |
107 | } |
108 | 108 | ||
109 | /** Standard input character device */ |
109 | /** Standard input character device */ |
110 | chardev_t *stdin = NULL; |
110 | chardev_t *stdin = NULL; |
111 | chardev_t *stdout = &null_stdout; |
111 | chardev_t *stdout = &null_stdout; |
112 | 112 | ||
113 | /** Initialize kernel logging facility |
113 | /** Initialize kernel logging facility |
114 | * |
114 | * |
115 | * The shared area contains kernel cyclic buffer. Userspace application may |
115 | * The shared area contains kernel cyclic buffer. Userspace application may |
116 | * be notified on new data with indication of position and size |
116 | * be notified on new data with indication of position and size |
117 | * of the data within the circular buffer. |
117 | * of the data within the circular buffer. |
118 | */ |
118 | */ |
119 | void klog_init(void) |
119 | void klog_init(void) |
120 | { |
120 | { |
121 | void *faddr = (void *) KA2PA(klog); |
121 | void *faddr = (void *) KA2PA(klog); |
122 | 122 | ||
123 | ASSERT((uintptr_t) faddr % FRAME_SIZE == 0); |
123 | ASSERT((uintptr_t) faddr % FRAME_SIZE == 0); |
124 | ASSERT(KLOG_SIZE % FRAME_SIZE == 0); |
124 | ASSERT(KLOG_SIZE % FRAME_SIZE == 0); |
125 | 125 | ||
126 | devno_t devno = device_assign_devno(); |
126 | devno_t devno = device_assign_devno(); |
127 | 127 | ||
128 | klog_parea.pbase = (uintptr_t) faddr; |
128 | klog_parea.pbase = (uintptr_t) faddr; |
129 | klog_parea.frames = SIZE2FRAMES(KLOG_SIZE); |
129 | klog_parea.frames = SIZE2FRAMES(KLOG_SIZE); |
130 | ddi_parea_register(&klog_parea); |
130 | ddi_parea_register(&klog_parea); |
131 | 131 | ||
132 | sysinfo_set_item_val("klog.faddr", NULL, (unative_t) faddr); |
132 | sysinfo_set_item_val("klog.faddr", NULL, (unative_t) faddr); |
133 | sysinfo_set_item_val("klog.pages", NULL, SIZE2FRAMES(KLOG_SIZE)); |
133 | sysinfo_set_item_val("klog.pages", NULL, SIZE2FRAMES(KLOG_SIZE)); |
134 | sysinfo_set_item_val("klog.devno", NULL, devno); |
134 | sysinfo_set_item_val("klog.devno", NULL, devno); |
135 | sysinfo_set_item_val("klog.inr", NULL, KLOG_VIRT_INR); |
135 | sysinfo_set_item_val("klog.inr", NULL, KLOG_VIRT_INR); |
136 | 136 | ||
137 | irq_initialize(&klog_irq); |
137 | irq_initialize(&klog_irq); |
138 | klog_irq.devno = devno; |
138 | klog_irq.devno = devno; |
139 | klog_irq.inr = KLOG_VIRT_INR; |
139 | klog_irq.inr = KLOG_VIRT_INR; |
140 | klog_irq.claim = klog_claim; |
140 | klog_irq.claim = klog_claim; |
141 | irq_register(&klog_irq); |
141 | irq_register(&klog_irq); |
142 | 142 | ||
143 | spinlock_lock(&klog_lock); |
143 | spinlock_lock(&klog_lock); |
144 | klog_inited = true; |
144 | klog_inited = true; |
145 | spinlock_unlock(&klog_lock); |
145 | spinlock_unlock(&klog_lock); |
146 | } |
146 | } |
147 | 147 | ||
148 | void grab_console(void) |
148 | void grab_console(void) |
149 | { |
149 | { |
150 | silent = false; |
150 | silent = false; |
151 | arch_grab_console(); |
151 | arch_grab_console(); |
152 | } |
152 | } |
153 | 153 | ||
154 | void release_console(void) |
154 | void release_console(void) |
155 | { |
155 | { |
156 | silent = true; |
156 | silent = true; |
157 | arch_release_console(); |
157 | arch_release_console(); |
158 | } |
158 | } |
159 | 159 | ||
160 | /** Get character from character device. Do not echo character. |
160 | /** Get character from character device. Do not echo character. |
161 | * |
161 | * |
162 | * @param chardev Character device. |
162 | * @param chardev Character device. |
163 | * |
163 | * |
164 | * @return Character read. |
164 | * @return Character read. |
165 | */ |
165 | */ |
166 | uint8_t _getc(chardev_t *chardev) |
166 | uint8_t _getc(chardev_t *chardev) |
167 | { |
167 | { |
168 | uint8_t ch; |
168 | uint8_t ch; |
169 | ipl_t ipl; |
169 | ipl_t ipl; |
170 | 170 | ||
171 | if (atomic_get(&haltstate)) { |
171 | if (atomic_get(&haltstate)) { |
172 | /* If we are here, we are hopefully on the processor, that |
172 | /* If we are here, we are hopefully on the processor, that |
173 | * issued the 'halt' command, so proceed to read the character |
173 | * issued the 'halt' command, so proceed to read the character |
174 | * directly from input |
174 | * directly from input |
175 | */ |
175 | */ |
176 | if (chardev->op->read) |
176 | if (chardev->op->read) |
177 | return chardev->op->read(chardev); |
177 | return chardev->op->read(chardev); |
178 | /* no other way of interacting with user, halt */ |
178 | /* no other way of interacting with user, halt */ |
179 | if (CPU) |
179 | if (CPU) |
180 | printf("cpu%u: ", CPU->id); |
180 | printf("cpu%u: ", CPU->id); |
181 | else |
181 | else |
182 | printf("cpu: "); |
182 | printf("cpu: "); |
183 | printf("halted (no kconsole)\n"); |
183 | printf("halted (no kconsole)\n"); |
184 | cpu_halt(); |
184 | cpu_halt(); |
185 | } |
185 | } |
186 | 186 | ||
187 | waitq_sleep(&chardev->wq); |
187 | waitq_sleep(&chardev->wq); |
188 | ipl = interrupts_disable(); |
188 | ipl = interrupts_disable(); |
189 | spinlock_lock(&chardev->lock); |
189 | spinlock_lock(&chardev->lock); |
190 | ch = chardev->buffer[(chardev->index - chardev->counter) % CHARDEV_BUFLEN]; |
190 | ch = chardev->buffer[(chardev->index - chardev->counter) % CHARDEV_BUFLEN]; |
191 | chardev->counter--; |
191 | chardev->counter--; |
192 | spinlock_unlock(&chardev->lock); |
192 | spinlock_unlock(&chardev->lock); |
193 | interrupts_restore(ipl); |
193 | interrupts_restore(ipl); |
194 | 194 | ||
195 | chardev->op->resume(chardev); |
195 | chardev->op->resume(chardev); |
196 | 196 | ||
197 | return ch; |
197 | return ch; |
198 | } |
198 | } |
199 | 199 | ||
200 | /** Get string from character device. |
200 | /** Get string from character device. |
201 | * |
201 | * |
202 | * Read characters from character device until first occurrence |
202 | * Read characters from character device until first occurrence |
203 | * of newline character. |
203 | * of newline character. |
204 | * |
204 | * |
205 | * @param chardev Character device. |
205 | * @param chardev Character device. |
206 | * @param buf Buffer where to store string terminated by '\0'. |
206 | * @param buf Buffer where to store string terminated by '\0'. |
207 | * @param buflen Size of the buffer. |
207 | * @param buflen Size of the buffer. |
208 | * |
208 | * |
209 | * @return Number of characters read. |
209 | * @return Number of characters read. |
210 | */ |
210 | */ |
211 | count_t gets(chardev_t *chardev, char *buf, size_t buflen) |
211 | count_t gets(chardev_t *chardev, char *buf, size_t buflen) |
212 | { |
212 | { |
213 | index_t index = 0; |
213 | index_t index = 0; |
214 | char ch; |
214 | char ch; |
215 | 215 | ||
216 | while (index < buflen) { |
216 | while (index < buflen) { |
217 | ch = _getc(chardev); |
217 | ch = _getc(chardev); |
218 | if (ch == '\b') { |
218 | if (ch == '\b') { |
219 | if (index > 0) { |
219 | if (index > 0) { |
220 | index--; |
220 | index--; |
221 | /* Space backspace, space */ |
221 | /* Space backspace, space */ |
222 | putchar('\b'); |
222 | putchar('\b'); |
223 | putchar(' '); |
223 | putchar(' '); |
224 | putchar('\b'); |
224 | putchar('\b'); |
225 | } |
225 | } |
226 | continue; |
226 | continue; |
227 | } |
227 | } |
228 | putchar(ch); |
228 | putchar(ch); |
229 | 229 | ||
230 | if (ch == '\n') { /* end of string => write 0, return */ |
230 | if (ch == '\n') { /* end of string => write 0, return */ |
231 | buf[index] = '\0'; |
231 | buf[index] = '\0'; |
232 | return (count_t) index; |
232 | return (count_t) index; |
233 | } |
233 | } |
234 | buf[index++] = ch; |
234 | buf[index++] = ch; |
235 | } |
235 | } |
236 | return (count_t) index; |
236 | return (count_t) index; |
237 | } |
237 | } |
238 | 238 | ||
239 | /** Get character from device & echo it to screen */ |
239 | /** Get character from device & echo it to screen */ |
240 | uint8_t getc(chardev_t *chardev) |
240 | uint8_t getc(chardev_t *chardev) |
241 | { |
241 | { |
242 | uint8_t ch; |
242 | uint8_t ch; |
243 | 243 | ||
244 | ch = _getc(chardev); |
244 | ch = _getc(chardev); |
245 | putchar(ch); |
245 | putchar(ch); |
246 | return ch; |
246 | return ch; |
247 | } |
247 | } |
248 | 248 | ||
249 | void klog_update(void) |
249 | void klog_update(void) |
250 | { |
250 | { |
251 | spinlock_lock(&klog_lock); |
251 | spinlock_lock(&klog_lock); |
252 | 252 | ||
253 | if ((klog_inited) && (klog_irq.notif_cfg.notify) && (klog_uspace > 0)) { |
253 | if ((klog_inited) && (klog_irq.notif_cfg.notify) && (klog_uspace > 0)) { |
254 | ipc_irq_send_msg_3(&klog_irq, klog_start, klog_len, klog_uspace); |
254 | ipc_irq_send_msg_3(&klog_irq, klog_start, klog_len, klog_uspace); |
255 | klog_uspace = 0; |
255 | klog_uspace = 0; |
256 | } |
256 | } |
257 | 257 | ||
258 | spinlock_unlock(&klog_lock); |
258 | spinlock_unlock(&klog_lock); |
259 | } |
259 | } |
260 | 260 | ||
261 | void putchar(char c) |
261 | void putchar(char c) |
262 | { |
262 | { |
263 | spinlock_lock(&klog_lock); |
263 | spinlock_lock(&klog_lock); |
264 | 264 | ||
265 | if ((klog_stored > 0) && (stdout->op->write)) { |
265 | if ((klog_stored > 0) && (stdout->op->write)) { |
266 | /* Print charaters stored in kernel log */ |
266 | /* Print charaters stored in kernel log */ |
267 | index_t i; |
267 | index_t i; |
268 | for (i = klog_len - klog_stored; i < klog_len; i++) |
268 | for (i = klog_len - klog_stored; i < klog_len; i++) |
269 | stdout->op->write(stdout, klog[(klog_start + i) % KLOG_SIZE], silent); |
269 | stdout->op->write(stdout, klog[(klog_start + i) % KLOG_SIZE], silent); |
270 | klog_stored = 0; |
270 | klog_stored = 0; |
271 | } |
271 | } |
272 | 272 | ||
273 | /* Store character in the cyclic kernel log */ |
273 | /* Store character in the cyclic kernel log */ |
274 | klog[(klog_start + klog_len) % KLOG_SIZE] = c; |
274 | klog[(klog_start + klog_len) % KLOG_SIZE] = c; |
275 | if (klog_len < KLOG_SIZE) |
275 | if (klog_len < KLOG_SIZE) |
276 | klog_len++; |
276 | klog_len++; |
277 | else |
277 | else |
278 | klog_start = (klog_start + 1) % KLOG_SIZE; |
278 | klog_start = (klog_start + 1) % KLOG_SIZE; |
279 | 279 | ||
280 | if (stdout->op->write) |
280 | if (stdout->op->write) |
281 | stdout->op->write(stdout, c, silent); |
281 | stdout->op->write(stdout, c, silent); |
282 | else { |
282 | else { |
283 | /* The character is just in the kernel log */ |
283 | /* The character is just in the kernel log */ |
284 | if (klog_stored < klog_len) |
284 | if (klog_stored < klog_len) |
285 | klog_stored++; |
285 | klog_stored++; |
286 | } |
286 | } |
287 | 287 | ||
288 | /* The character is stored for uspace */ |
288 | /* The character is stored for uspace */ |
289 | if (klog_uspace < klog_len) |
289 | if (klog_uspace < klog_len) |
290 | klog_uspace++; |
290 | klog_uspace++; |
291 | 291 | ||
292 | /* Check notify uspace to update */ |
292 | /* Check notify uspace to update */ |
293 | bool update; |
293 | bool update; |
294 | if ((klog_uspace > KLOG_LATENCY) || (c == '\n')) |
294 | if ((klog_uspace > KLOG_LATENCY) || (c == '\n')) |
295 | update = true; |
295 | update = true; |
296 | else |
296 | else |
297 | update = false; |
297 | update = false; |
298 | 298 | ||
299 | spinlock_unlock(&klog_lock); |
299 | spinlock_unlock(&klog_lock); |
300 | 300 | ||
301 | if (update) |
301 | if (update) |
302 | klog_update(); |
302 | klog_update(); |
303 | } |
303 | } |
304 | 304 | ||
305 | /** @} |
305 | /** @} |
306 | */ |
306 | */ |
307 | 307 |