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1 | /* |
1 | /* |
2 | * Copyright (c) 2008 Pavel Rimsky |
2 | * Copyright (c) 2008 Pavel Rimsky |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup sparc64 |
29 | /** @addtogroup sparc64 |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** |
32 | /** |
33 | * @file |
33 | * @file |
34 | * @brief SGCN driver. |
34 | * @brief SGCN driver. |
35 | */ |
35 | */ |
36 | 36 | ||
37 | #include <arch.h> |
37 | #include <arch.h> |
38 | #include <arch/drivers/sgcn.h> |
38 | #include <arch/drivers/sgcn.h> |
39 | #include <arch/drivers/kbd.h> |
39 | #include <arch/drivers/kbd.h> |
40 | #include <genarch/ofw/ofw_tree.h> |
40 | #include <genarch/ofw/ofw_tree.h> |
41 | #include <debug.h> |
41 | #include <debug.h> |
42 | #include <string.h> |
42 | #include <string.h> |
43 | #include <print.h> |
43 | #include <print.h> |
44 | #include <mm/page.h> |
44 | #include <mm/page.h> |
45 | #include <proc/thread.h> |
45 | #include <proc/thread.h> |
46 | #include <console/chardev.h> |
46 | #include <console/chardev.h> |
47 | #include <console/console.h> |
47 | #include <console/console.h> |
48 | #include <sysinfo/sysinfo.h> |
48 | #include <sysinfo/sysinfo.h> |
49 | #include <synch/spinlock.h> |
49 | #include <synch/spinlock.h> |
50 | 50 | ||
51 | #define POLL_INTERVAL 10000 |
51 | #define POLL_INTERVAL 10000 |
52 | 52 | ||
53 | /* |
53 | /* |
54 | * Physical address at which the SBBC starts. This value has been obtained |
54 | * Physical address at which the SBBC starts. This value has been obtained |
55 | * by inspecting (using Simics) memory accesses made by OBP. It is valid |
55 | * by inspecting (using Simics) memory accesses made by OBP. It is valid |
56 | * for the Simics-simulated Serengeti machine. The author of this code is |
56 | * for the Simics-simulated Serengeti machine. The author of this code is |
57 | * not sure whether this value is valid generally. |
57 | * not sure whether this value is valid generally. |
58 | */ |
58 | */ |
59 | #define SBBC_START 0x63000000000 |
59 | #define SBBC_START 0x63000000000 |
60 | 60 | ||
61 | /* offset of SRAM within the SBBC memory */ |
61 | /* offset of SRAM within the SBBC memory */ |
62 | #define SBBC_SRAM_OFFSET 0x900000 |
62 | #define SBBC_SRAM_OFFSET 0x900000 |
63 | 63 | ||
64 | /* size (in bytes) of the physical memory area which will be mapped */ |
64 | /* size (in bytes) of the physical memory area which will be mapped */ |
65 | #define MAPPED_AREA_SIZE (128 * 1024) |
65 | #define MAPPED_AREA_SIZE (128 * 1024) |
66 | 66 | ||
67 | /* magic string contained at the beginning of SRAM */ |
67 | /* magic string contained at the beginning of SRAM */ |
68 | #define SRAM_TOC_MAGIC "TOCSRAM" |
68 | #define SRAM_TOC_MAGIC "TOCSRAM" |
69 | 69 | ||
70 | /* |
70 | /* |
71 | * Key into the SRAM table of contents which identifies the entry |
71 | * Key into the SRAM table of contents which identifies the entry |
72 | * describing the OBP console buffer. It is worth mentioning |
72 | * describing the OBP console buffer. It is worth mentioning |
73 | * that the OBP console buffer is not the only console buffer |
73 | * that the OBP console buffer is not the only console buffer |
74 | * which can be used. It is, however, used because when the kernel |
74 | * which can be used. It is, however, used because when the kernel |
75 | * is running, the OBP buffer is not used by OBP any more but OBP |
75 | * is running, the OBP buffer is not used by OBP any more but OBP |
76 | * has already made necessary arrangements so that the output will |
76 | * has already made necessary arrangements so that the output will |
77 | * be read from the OBP buffer and input will go to the OBP buffer. |
77 | * be read from the OBP buffer and input will go to the OBP buffer. |
78 | * Therefore HelenOS needs to make no such arrangements any more. |
78 | * Therefore HelenOS needs to make no such arrangements any more. |
79 | */ |
79 | */ |
80 | #define CONSOLE_KEY "OBPCONS" |
80 | #define CONSOLE_KEY "OBPCONS" |
81 | 81 | ||
82 | /* magic string contained at the beginning of the console buffer */ |
82 | /* magic string contained at the beginning of the console buffer */ |
83 | #define SGCN_BUFFER_MAGIC "CON" |
83 | #define SGCN_BUFFER_MAGIC "CON" |
84 | 84 | ||
85 | /* |
85 | /* |
86 | * Returns a pointer to the object of a given type which is placed at the given |
86 | * Returns a pointer to the object of a given type which is placed at the given |
87 | * offset from the SRAM beginning. |
87 | * offset from the SRAM beginning. |
88 | */ |
88 | */ |
89 | #define SRAM(type, offset) ((type *) (sram_begin + (offset))) |
89 | #define SRAM(type, offset) ((type *) (sram_begin + (offset))) |
90 | 90 | ||
91 | /* Returns a pointer to the SRAM table of contents. */ |
91 | /* Returns a pointer to the SRAM table of contents. */ |
92 | #define SRAM_TOC (SRAM(iosram_toc_t, 0)) |
92 | #define SRAM_TOC (SRAM(iosram_toc_t, 0)) |
93 | 93 | ||
94 | /* |
94 | /* |
95 | * Returns a pointer to the object of a given type which is placed at the given |
95 | * Returns a pointer to the object of a given type which is placed at the given |
96 | * offset from the console buffer beginning. |
96 | * offset from the console buffer beginning. |
97 | */ |
97 | */ |
98 | #define SGCN_BUFFER(type, offset) \ |
98 | #define SGCN_BUFFER(type, offset) \ |
99 | ((type *) (sgcn_buffer_begin + (offset))) |
99 | ((type *) (sgcn_buffer_begin + (offset))) |
100 | 100 | ||
101 | /** Returns a pointer to the console buffer header. */ |
101 | /** Returns a pointer to the console buffer header. */ |
102 | #define SGCN_BUFFER_HEADER (SGCN_BUFFER(sgcn_buffer_header_t, 0)) |
102 | #define SGCN_BUFFER_HEADER (SGCN_BUFFER(sgcn_buffer_header_t, 0)) |
103 | 103 | ||
104 | /** starting address of SRAM, will be set by the init_sram_begin function */ |
104 | /** starting address of SRAM, will be set by the init_sram_begin function */ |
105 | static uintptr_t sram_begin; |
105 | static uintptr_t sram_begin; |
106 | 106 | ||
107 | /** |
107 | /** |
108 | * starting address of the SGCN buffer, will be set by the |
108 | * starting address of the SGCN buffer, will be set by the |
109 | * init_sgcn_buffer_begin function |
109 | * init_sgcn_buffer_begin function |
110 | */ |
110 | */ |
111 | static uintptr_t sgcn_buffer_begin; |
111 | static uintptr_t sgcn_buffer_begin; |
112 | 112 | ||
113 | /* true iff the kernel driver should ignore pressed keys */ |
113 | /* true iff the kernel driver should ignore pressed keys */ |
114 | static bool kbd_disabled; |
114 | static bool kbd_disabled; |
115 | 115 | ||
116 | /* |
116 | /* |
117 | * Ensures that writing to the buffer and consequent update of the write pointer |
117 | * Ensures that writing to the buffer and consequent update of the write pointer |
118 | * are together one atomic operation. |
118 | * are together one atomic operation. |
119 | */ |
119 | */ |
120 | SPINLOCK_INITIALIZE(sgcn_output_lock); |
120 | SPINLOCK_INITIALIZE(sgcn_output_lock); |
121 | 121 | ||
122 | /* |
122 | /* |
123 | * Prevents the input buffer read/write pointers from getting to inconsistent |
123 | * Prevents the input buffer read/write pointers from getting to inconsistent |
124 | * state. |
124 | * state. |
125 | */ |
125 | */ |
126 | SPINLOCK_INITIALIZE(sgcn_input_lock); |
126 | SPINLOCK_INITIALIZE(sgcn_input_lock); |
127 | 127 | ||
128 | 128 | ||
129 | /* functions referenced from definitions of I/O operations structures */ |
129 | /* functions referenced from definitions of I/O operations structures */ |
130 | static void sgcn_putchar(outdev_t *, const wchar_t, bool); |
130 | static void sgcn_putchar(outdev_t *, const wchar_t, bool); |
131 | 131 | ||
132 | /** SGCN output device operations */ |
132 | /** SGCN output device operations */ |
133 | static outdev_operations_t sgcnout_ops = { |
133 | static outdev_operations_t sgcnout_ops = { |
134 | .write = sgcn_putchar |
134 | .write = sgcn_putchar |
135 | }; |
135 | }; |
136 | 136 | ||
137 | static outdev_t sgcnout; /**< SGCN output device. */ |
137 | static outdev_t sgcnout; /**< SGCN output device. */ |
138 | 138 | ||
139 | /** |
139 | /** |
140 | * Set some sysinfo values (SRAM address and SRAM size). |
140 | * Set some sysinfo values (SRAM address and SRAM size). |
141 | */ |
141 | */ |
142 | static void register_sram(uintptr_t sram_begin_physical) |
142 | static void register_sram(uintptr_t sram_begin_physical) |
143 | { |
143 | { |
144 | sysinfo_set_item_val("sram.area.size", NULL, MAPPED_AREA_SIZE); |
144 | sysinfo_set_item_val("sram.area.size", NULL, MAPPED_AREA_SIZE); |
145 | sysinfo_set_item_val("sram.address.physical", NULL, |
145 | sysinfo_set_item_val("sram.address.physical", NULL, |
146 | sram_begin_physical); |
146 | sram_begin_physical); |
147 | } |
147 | } |
148 | 148 | ||
149 | /** |
149 | /** |
150 | * Initializes the starting address of SRAM. |
150 | * Initializes the starting address of SRAM. |
151 | * |
151 | * |
152 | * The SRAM starts 0x900000 + C bytes behind the SBBC start in the |
152 | * The SRAM starts 0x900000 + C bytes behind the SBBC start in the |
153 | * physical memory, where C is the value read from the "iosram-toc" |
153 | * physical memory, where C is the value read from the "iosram-toc" |
154 | * property of the "/chosen" OBP node. The sram_begin variable will |
154 | * property of the "/chosen" OBP node. The sram_begin variable will |
155 | * be set to the virtual address which maps to the SRAM physical |
155 | * be set to the virtual address which maps to the SRAM physical |
156 | * address. |
156 | * address. |
157 | */ |
157 | */ |
158 | static void init_sram_begin(void) |
158 | static void init_sram_begin(void) |
159 | { |
159 | { |
160 | ofw_tree_node_t *chosen; |
160 | ofw_tree_node_t *chosen; |
161 | ofw_tree_property_t *iosram_toc; |
161 | ofw_tree_property_t *iosram_toc; |
162 | uintptr_t sram_begin_physical; |
162 | uintptr_t sram_begin_physical; |
163 | 163 | ||
164 | chosen = ofw_tree_lookup("/chosen"); |
164 | chosen = ofw_tree_lookup("/chosen"); |
165 | if (!chosen) |
165 | if (!chosen) |
166 | panic("Cannot find '/chosen'."); |
166 | panic("Cannot find '/chosen'."); |
167 | 167 | ||
168 | iosram_toc = ofw_tree_getprop(chosen, "iosram-toc"); |
168 | iosram_toc = ofw_tree_getprop(chosen, "iosram-toc"); |
169 | if (!iosram_toc) |
169 | if (!iosram_toc) |
170 | panic("Cannot find property 'iosram-toc'."); |
170 | panic("Cannot find property 'iosram-toc'."); |
171 | if (!iosram_toc->value) |
171 | if (!iosram_toc->value) |
172 | panic("Cannot find SRAM TOC."); |
172 | panic("Cannot find SRAM TOC."); |
173 | 173 | ||
174 | sram_begin_physical = SBBC_START + SBBC_SRAM_OFFSET |
174 | sram_begin_physical = SBBC_START + SBBC_SRAM_OFFSET |
175 | + *((uint32_t *) iosram_toc->value); |
175 | + *((uint32_t *) iosram_toc->value); |
176 | sram_begin = hw_map(sram_begin_physical, MAPPED_AREA_SIZE); |
176 | sram_begin = hw_map(sram_begin_physical, MAPPED_AREA_SIZE); |
177 | 177 | ||
178 | register_sram(sram_begin_physical); |
178 | register_sram(sram_begin_physical); |
179 | } |
179 | } |
180 | 180 | ||
181 | /** |
181 | /** |
182 | * Initializes the starting address of the SGCN buffer. |
182 | * Initializes the starting address of the SGCN buffer. |
183 | * |
183 | * |
184 | * The offset of the SGCN buffer within SRAM is obtained from the |
184 | * The offset of the SGCN buffer within SRAM is obtained from the |
185 | * SRAM table of contents. The table of contents contains |
185 | * SRAM table of contents. The table of contents contains |
186 | * information about several buffers, among which there is an OBP |
186 | * information about several buffers, among which there is an OBP |
187 | * console buffer - this one will be used as the SGCN buffer. |
187 | * console buffer - this one will be used as the SGCN buffer. |
188 | * |
188 | * |
189 | * This function also writes the offset of the SGCN buffer within SRAM |
189 | * This function also writes the offset of the SGCN buffer within SRAM |
190 | * under the sram.buffer.offset sysinfo key. |
190 | * under the sram.buffer.offset sysinfo key. |
191 | */ |
191 | */ |
192 | static void sgcn_buffer_begin_init(void) |
192 | static void sgcn_buffer_begin_init(void) |
193 | { |
193 | { |
194 | static bool initialized; |
194 | static bool initialized; |
195 | 195 | ||
196 | if (initialized) |
196 | if (initialized) |
197 | return; |
197 | return; |
198 | 198 | ||
199 | init_sram_begin(); |
199 | init_sram_begin(); |
200 | 200 | ||
201 | ASSERT(str_cmp(SRAM_TOC->magic, SRAM_TOC_MAGIC) == 0); |
201 | ASSERT(str_cmp(SRAM_TOC->magic, SRAM_TOC_MAGIC) == 0); |
202 | 202 | ||
203 | /* lookup TOC entry with the correct key */ |
203 | /* lookup TOC entry with the correct key */ |
204 | uint32_t i; |
204 | uint32_t i; |
205 | for (i = 0; i < MAX_TOC_ENTRIES; i++) { |
205 | for (i = 0; i < MAX_TOC_ENTRIES; i++) { |
206 | if (str_cmp(SRAM_TOC->keys[i].key, CONSOLE_KEY) == 0) |
206 | if (str_cmp(SRAM_TOC->keys[i].key, CONSOLE_KEY) == 0) |
207 | break; |
207 | break; |
208 | } |
208 | } |
209 | ASSERT(i < MAX_TOC_ENTRIES); |
209 | ASSERT(i < MAX_TOC_ENTRIES); |
210 | 210 | ||
211 | sgcn_buffer_begin = sram_begin + SRAM_TOC->keys[i].offset; |
211 | sgcn_buffer_begin = sram_begin + SRAM_TOC->keys[i].offset; |
212 | 212 | ||
213 | sysinfo_set_item_val("sram.buffer.offset", NULL, |
213 | sysinfo_set_item_val("sram.buffer.offset", NULL, |
214 | SRAM_TOC->keys[i].offset); |
214 | SRAM_TOC->keys[i].offset); |
215 | 215 | ||
216 | initialized = true; |
216 | initialized = true; |
217 | } |
217 | } |
218 | 218 | ||
219 | /** |
219 | /** |
220 | * Writes a single character to the SGCN (circular) output buffer |
220 | * Writes a single character to the SGCN (circular) output buffer |
221 | * and updates the output write pointer so that SGCN gets to know |
221 | * and updates the output write pointer so that SGCN gets to know |
222 | * that the character has been written. |
222 | * that the character has been written. |
223 | */ |
223 | */ |
224 | static void sgcn_do_putchar(const char c) |
224 | static void sgcn_do_putchar(const char c) |
225 | { |
225 | { |
226 | uint32_t begin = SGCN_BUFFER_HEADER->out_begin; |
226 | uint32_t begin = SGCN_BUFFER_HEADER->out_begin; |
227 | uint32_t end = SGCN_BUFFER_HEADER->out_end; |
227 | uint32_t end = SGCN_BUFFER_HEADER->out_end; |
228 | uint32_t size = end - begin; |
228 | uint32_t size = end - begin; |
229 | 229 | ||
230 | /* we need pointers to volatile variables */ |
230 | /* we need pointers to volatile variables */ |
231 | volatile char *buf_ptr = (volatile char *) |
231 | volatile char *buf_ptr = (volatile char *) |
232 | SGCN_BUFFER(char, SGCN_BUFFER_HEADER->out_wrptr); |
232 | SGCN_BUFFER(char, SGCN_BUFFER_HEADER->out_wrptr); |
233 | volatile uint32_t *out_wrptr_ptr = &(SGCN_BUFFER_HEADER->out_wrptr); |
233 | volatile uint32_t *out_wrptr_ptr = &(SGCN_BUFFER_HEADER->out_wrptr); |
234 | volatile uint32_t *out_rdptr_ptr = &(SGCN_BUFFER_HEADER->out_rdptr); |
234 | volatile uint32_t *out_rdptr_ptr = &(SGCN_BUFFER_HEADER->out_rdptr); |
235 | 235 | ||
236 | /* |
236 | /* |
237 | * Write the character and increment the write pointer modulo the |
237 | * Write the character and increment the write pointer modulo the |
238 | * output buffer size. Note that if we are to rewrite a character |
238 | * output buffer size. Note that if we are to rewrite a character |
239 | * which has not been read by the SGCN controller yet (i.e. the output |
239 | * which has not been read by the SGCN controller yet (i.e. the output |
240 | * buffer is full), we need to wait until the controller reads some more |
240 | * buffer is full), we need to wait until the controller reads some more |
241 | * characters. We wait actively, which means that all threads waiting |
241 | * characters. We wait actively, which means that all threads waiting |
242 | * for the lock are blocked. However, this situation is |
242 | * for the lock are blocked. However, this situation is |
243 | * 1) rare - the output buffer is big, so filling the whole |
243 | * 1) rare - the output buffer is big, so filling the whole |
244 | * output buffer is improbable |
244 | * output buffer is improbable |
245 | * 2) short-lasting - it will take the controller only a fraction |
245 | * 2) short-lasting - it will take the controller only a fraction |
246 | * of millisecond to pick the unread characters up |
246 | * of millisecond to pick the unread characters up |
247 | * 3) not serious - the blocked threads are those that print something |
247 | * 3) not serious - the blocked threads are those that print something |
248 | * to user console, which is not a time-critical operation |
248 | * to user console, which is not a time-critical operation |
249 | */ |
249 | */ |
250 | uint32_t new_wrptr = (((*out_wrptr_ptr) - begin + 1) % size) + begin; |
250 | uint32_t new_wrptr = (((*out_wrptr_ptr) - begin + 1) % size) + begin; |
251 | while (*out_rdptr_ptr == new_wrptr) |
251 | while (*out_rdptr_ptr == new_wrptr) |
252 | ; |
252 | ; |
253 | *buf_ptr = c; |
253 | *buf_ptr = c; |
254 | *out_wrptr_ptr = new_wrptr; |
254 | *out_wrptr_ptr = new_wrptr; |
255 | } |
255 | } |
256 | 256 | ||
257 | /** |
257 | /** |
258 | * SGCN output operation. Prints a single character to the SGCN. Newline |
258 | * SGCN output operation. Prints a single character to the SGCN. Newline |
259 | * character is converted to CRLF. |
259 | * character is converted to CRLF. |
260 | */ |
260 | */ |
261 | static void sgcn_putchar(outdev_t *od, const wchar_t ch, bool silent) |
261 | static void sgcn_putchar(outdev_t *od, const wchar_t ch, bool silent) |
262 | { |
262 | { |
263 | if (!silent) { |
263 | if (!silent) { |
264 | spinlock_lock(&sgcn_output_lock); |
264 | spinlock_lock(&sgcn_output_lock); |
265 | 265 | ||
266 | if (ascii_check(ch)) { |
266 | if (ascii_check(ch)) { |
267 | if (ch == '\n') |
267 | if (ch == '\n') |
268 | sgcn_do_putchar('\r'); |
268 | sgcn_do_putchar('\r'); |
269 | sgcn_do_putchar(ch); |
269 | sgcn_do_putchar(ch); |
270 | } else |
270 | } else |
271 | sgcn_do_putchar(U_SPECIAL); |
271 | sgcn_do_putchar(U_SPECIAL); |
272 | 272 | ||
273 | spinlock_unlock(&sgcn_output_lock); |
273 | spinlock_unlock(&sgcn_output_lock); |
274 | } |
274 | } |
275 | } |
275 | } |
276 | 276 | ||
277 | /** |
277 | /** |
278 | * Grabs the input for kernel. |
278 | * Grabs the input for kernel. |
279 | */ |
279 | */ |
280 | void sgcn_grab(void) |
280 | void sgcn_grab(void) |
281 | { |
281 | { |
282 | kbd_disabled = false; |
282 | kbd_disabled = false; |
283 | } |
283 | } |
284 | 284 | ||
285 | /** |
285 | /** |
286 | * Releases the input so that userspace can use it. |
286 | * Releases the input so that userspace can use it. |
287 | */ |
287 | */ |
288 | void sgcn_release(void) |
288 | void sgcn_release(void) |
289 | { |
289 | { |
290 | kbd_disabled = true; |
290 | kbd_disabled = true; |
291 | } |
291 | } |
292 | 292 | ||
293 | /** |
293 | /** |
294 | * Function regularly called by the keyboard polling thread. Finds out whether |
294 | * Function regularly called by the keyboard polling thread. Finds out whether |
295 | * there are some unread characters in the input queue. If so, it picks them up |
295 | * there are some unread characters in the input queue. If so, it picks them up |
296 | * and sends them to the upper layers of HelenOS. |
296 | * and sends them to the upper layers of HelenOS. |
297 | */ |
297 | */ |
298 | static void sgcn_poll(sgcn_instance_t *instance) |
298 | static void sgcn_poll(sgcn_instance_t *instance) |
299 | { |
299 | { |
300 | uint32_t begin = SGCN_BUFFER_HEADER->in_begin; |
300 | uint32_t begin = SGCN_BUFFER_HEADER->in_begin; |
301 | uint32_t end = SGCN_BUFFER_HEADER->in_end; |
301 | uint32_t end = SGCN_BUFFER_HEADER->in_end; |
302 | uint32_t size = end - begin; |
302 | uint32_t size = end - begin; |
303 | 303 | ||
304 | if (kbd_disabled) |
304 | if (kbd_disabled) |
305 | return; |
305 | return; |
306 | 306 | ||
307 | spinlock_lock(&sgcn_input_lock); |
307 | spinlock_lock(&sgcn_input_lock); |
308 | 308 | ||
309 | /* we need pointers to volatile variables */ |
309 | /* we need pointers to volatile variables */ |
310 | volatile char *buf_ptr = (volatile char *) |
310 | volatile char *buf_ptr = (volatile char *) |
311 | SGCN_BUFFER(char, SGCN_BUFFER_HEADER->in_rdptr); |
311 | SGCN_BUFFER(char, SGCN_BUFFER_HEADER->in_rdptr); |
312 | volatile uint32_t *in_wrptr_ptr = &(SGCN_BUFFER_HEADER->in_wrptr); |
312 | volatile uint32_t *in_wrptr_ptr = &(SGCN_BUFFER_HEADER->in_wrptr); |
313 | volatile uint32_t *in_rdptr_ptr = &(SGCN_BUFFER_HEADER->in_rdptr); |
313 | volatile uint32_t *in_rdptr_ptr = &(SGCN_BUFFER_HEADER->in_rdptr); |
314 | 314 | ||
315 | while (*in_rdptr_ptr != *in_wrptr_ptr) { |
315 | while (*in_rdptr_ptr != *in_wrptr_ptr) { |
316 | buf_ptr = (volatile char *) |
316 | buf_ptr = (volatile char *) |
317 | SGCN_BUFFER(char, SGCN_BUFFER_HEADER->in_rdptr); |
317 | SGCN_BUFFER(char, SGCN_BUFFER_HEADER->in_rdptr); |
318 | char c = *buf_ptr; |
318 | char c = *buf_ptr; |
319 | *in_rdptr_ptr = (((*in_rdptr_ptr) - begin + 1) % size) + begin; |
319 | *in_rdptr_ptr = (((*in_rdptr_ptr) - begin + 1) % size) + begin; |
320 | 320 | ||
321 | indev_push_character(instance->srlnin, c); |
321 | indev_push_character(instance->srlnin, c); |
322 | } |
322 | } |
323 | 323 | ||
324 | spinlock_unlock(&sgcn_input_lock); |
324 | spinlock_unlock(&sgcn_input_lock); |
325 | } |
325 | } |
326 | 326 | ||
327 | /** |
327 | /** |
328 | * Polling thread function. |
328 | * Polling thread function. |
329 | */ |
329 | */ |
330 | static void ksgcnpoll(void *instance) { |
330 | static void ksgcnpoll(void *instance) { |
331 | while (1) { |
331 | while (1) { |
332 | if (!silent) |
332 | if (!silent) |
333 | sgcn_poll(instance); |
333 | sgcn_poll(instance); |
334 | thread_usleep(POLL_INTERVAL); |
334 | thread_usleep(POLL_INTERVAL); |
335 | } |
335 | } |
336 | } |
336 | } |
337 | 337 | ||
338 | /** |
338 | /** |
339 | * A public function which initializes input from the Serengeti console. |
339 | * A public function which initializes input from the Serengeti console. |
340 | */ |
340 | */ |
341 | sgcn_instance_t *sgcnin_init(void) |
341 | sgcn_instance_t *sgcnin_init(void) |
342 | { |
342 | { |
343 | sgcn_buffer_begin_init(); |
343 | sgcn_buffer_begin_init(); |
344 | 344 | ||
345 | sgcn_instance_t *instance = |
345 | sgcn_instance_t *instance = |
346 | malloc(sizeof(sgcn_instance_t), FRAME_ATOMIC); |
346 | malloc(sizeof(sgcn_instance_t), FRAME_ATOMIC); |
347 | if (!instance) |
- | |
348 | return NULL; |
- | |
349 | 347 | ||
- | 348 | if (instance) { |
|
350 | instance->srlnin = NULL; |
349 | instance->srlnin = NULL; |
351 | instance->thread = thread_create(ksgcnpoll, instance, TASK, 0, |
350 | instance->thread = thread_create(ksgcnpoll, instance, TASK, 0, |
352 | "ksgcnpoll", true); |
351 | "ksgcnpoll", true); |
- | 352 | ||
353 | if (!instance->thread) { |
353 | if (!instance->thread) { |
354 | free(instance); |
354 | free(instance); |
355 | return NULL; |
355 | return NULL; |
356 | } |
356 | } |
- | 357 | } |
|
357 | 358 | ||
358 | return instance; |
359 | return instance; |
359 | } |
360 | } |
360 | 361 | ||
361 | void sgcnin_wire(sgcn_instance_t *instance, indev_t *srlnin) |
362 | void sgcnin_wire(sgcn_instance_t *instance, indev_t *srlnin) |
362 | { |
363 | { |
363 | ASSERT(instance); |
364 | ASSERT(instance); |
364 | ASSERT(srlnin); |
365 | ASSERT(srlnin); |
365 | 366 | ||
366 | instance->srlnin = srlnin; |
367 | instance->srlnin = srlnin; |
367 | thread_ready(instance->thread); |
368 | thread_ready(instance->thread); |
368 | 369 | ||
369 | sysinfo_set_item_val("kbd", NULL, true); |
370 | sysinfo_set_item_val("kbd", NULL, true); |
370 | } |
371 | } |
371 | 372 | ||
372 | /** |
373 | /** |
373 | * A public function which initializes output to the Serengeti console. |
374 | * A public function which initializes output to the Serengeti console. |
374 | */ |
375 | */ |
375 | void sgcnout_init(void) |
376 | void sgcnout_init(void) |
376 | { |
377 | { |
377 | sgcn_buffer_begin_init(); |
378 | sgcn_buffer_begin_init(); |
378 | 379 | ||
379 | sysinfo_set_item_val("fb.kind", NULL, 4); |
380 | sysinfo_set_item_val("fb.kind", NULL, 4); |
380 | 381 | ||
381 | outdev_initialize("sgcnout", &sgcnout, &sgcnout_ops); |
382 | outdev_initialize("sgcnout", &sgcnout, &sgcnout_ops); |
382 | stdout = &sgcnout; |
383 | stdout = &sgcnout; |
383 | } |
384 | } |
384 | 385 | ||
385 | /** @} |
386 | /** @} |
386 | */ |
387 | */ |
387 | 388 |