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1 | /* |
1 | /* |
2 | * Copyright (c) 2007 Michal Kebrt, Petr Stepan |
2 | * Copyright (c) 2007 Michal Kebrt, Petr Stepan |
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 arm32 |
29 | /** @addtogroup arm32gxemul |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | * @brief GXemul drivers. |
33 | * @brief GXemul drivers. |
34 | */ |
34 | */ |
35 | 35 | ||
36 | #include <interrupt.h> |
36 | #include <interrupt.h> |
37 | #include <ipc/irq.h> |
37 | #include <ipc/irq.h> |
38 | #include <console/chardev.h> |
38 | #include <console/chardev.h> |
39 | #include <arch/drivers/gxemul.h> |
39 | #include <arch/drivers/gxemul.h> |
40 | #include <console/console.h> |
40 | #include <console/console.h> |
41 | #include <sysinfo/sysinfo.h> |
41 | #include <sysinfo/sysinfo.h> |
42 | #include <print.h> |
42 | #include <print.h> |
43 | #include <ddi/device.h> |
43 | #include <ddi/device.h> |
44 | #include <mm/page.h> |
44 | #include <mm/page.h> |
45 | #include <arch/machine.h> |
45 | #include <arch/machine.h> |
46 | #include <arch/debug/print.h> |
46 | #include <arch/debug/print.h> |
47 | 47 | ||
48 | 48 | ||
49 | /* Addresses of devices. */ |
49 | /* Addresses of devices. */ |
50 | #define GXEMUL_VIDEORAM 0x10000000 |
50 | #define GXEMUL_VIDEORAM 0x10000000 |
51 | #define GXEMUL_KBD 0x10000000 |
51 | #define GXEMUL_KBD 0x10000000 |
52 | #define GXEMUL_HALT_OFFSET 0x10 |
52 | #define GXEMUL_HALT_OFFSET 0x10 |
53 | #define GXEMUL_RTC 0x15000000 |
53 | #define GXEMUL_RTC 0x15000000 |
54 | #define GXEMUL_RTC_FREQ_OFFSET 0x100 |
54 | #define GXEMUL_RTC_FREQ_OFFSET 0x100 |
55 | #define GXEMUL_RTC_ACK_OFFSET 0x110 |
55 | #define GXEMUL_RTC_ACK_OFFSET 0x110 |
56 | #define GXEMUL_IRQC 0x16000000 |
56 | #define GXEMUL_IRQC 0x16000000 |
57 | #define GXEMUL_IRQC_MASK_OFFSET 0x4 |
57 | #define GXEMUL_IRQC_MASK_OFFSET 0x4 |
58 | #define GXEMUL_IRQC_UNMASK_OFFSET 0x8 |
58 | #define GXEMUL_IRQC_UNMASK_OFFSET 0x8 |
59 | #define GXEMUL_MP 0x11000000 |
59 | #define GXEMUL_MP 0x11000000 |
60 | #define GXEMUL_MP_MEMSIZE_OFFSET 0x0090 |
60 | #define GXEMUL_MP_MEMSIZE_OFFSET 0x0090 |
61 | #define GXEMUL_FB 0x12000000 |
61 | #define GXEMUL_FB 0x12000000 |
62 | 62 | ||
63 | 63 | ||
64 | /* IRQs */ |
64 | /* IRQs */ |
65 | #define GXEMUL_KBD_IRQ 2 |
65 | #define GXEMUL_KBD_IRQ 2 |
66 | #define GXEMUL_TIMER_IRQ 4 |
66 | #define GXEMUL_TIMER_IRQ 4 |
67 | 67 | ||
68 | static gxemul_hw_map_t gxemul_hw_map; |
68 | static gxemul_hw_map_t gxemul_hw_map; |
69 | static chardev_t console; |
69 | static chardev_t console; |
70 | static irq_t gxemul_console_irq; |
70 | static irq_t gxemul_console_irq; |
71 | static irq_t gxemul_timer_irq; |
71 | static irq_t gxemul_timer_irq; |
72 | 72 | ||
73 | static bool hw_map_init_called = false; |
73 | static bool hw_map_init_called = false; |
74 | 74 | ||
75 | static void gxemul_kbd_enable(chardev_t *dev); |
75 | static void gxemul_kbd_enable(chardev_t *dev); |
76 | static void gxemul_kbd_disable(chardev_t *dev); |
76 | static void gxemul_kbd_disable(chardev_t *dev); |
77 | static void gxemul_write(chardev_t *dev, const char ch); |
77 | static void gxemul_write(chardev_t *dev, const char ch); |
78 | static char gxemul_do_read(chardev_t *dev); |
78 | static char gxemul_do_read(chardev_t *dev); |
79 | 79 | ||
80 | static chardev_operations_t gxemul_ops = { |
80 | static chardev_operations_t gxemul_ops = { |
81 | .resume = gxemul_kbd_enable, |
81 | .resume = gxemul_kbd_enable, |
82 | .suspend = gxemul_kbd_disable, |
82 | .suspend = gxemul_kbd_disable, |
83 | .write = gxemul_write, |
83 | .write = gxemul_write, |
84 | .read = gxemul_do_read, |
84 | .read = gxemul_do_read, |
85 | }; |
85 | }; |
86 | 86 | ||
87 | 87 | ||
88 | /** Returns the mask of active interrupts. */ |
88 | /** Returns the mask of active interrupts. */ |
89 | static inline uint32_t gxemul_irqc_get_sources(void) |
89 | static inline uint32_t gxemul_irqc_get_sources(void) |
90 | { |
90 | { |
91 | return *(uint32_t*) gxemul_hw_map.irqc; |
91 | return *(uint32_t*) gxemul_hw_map.irqc; |
92 | } |
92 | } |
93 | 93 | ||
94 | 94 | ||
95 | /** Masks interrupt. |
95 | /** Masks interrupt. |
96 | * |
96 | * |
97 | * @param irq interrupt number |
97 | * @param irq interrupt number |
98 | */ |
98 | */ |
99 | static inline void gxemul_irqc_mask(uint32_t irq) |
99 | static inline void gxemul_irqc_mask(uint32_t irq) |
100 | { |
100 | { |
101 | *(uint32_t*) gxemul_hw_map.irqc_mask = irq; |
101 | *(uint32_t*) gxemul_hw_map.irqc_mask = irq; |
102 | } |
102 | } |
103 | 103 | ||
104 | 104 | ||
105 | /** Unmasks interrupt. |
105 | /** Unmasks interrupt. |
106 | * |
106 | * |
107 | * @param irq interrupt number |
107 | * @param irq interrupt number |
108 | */ |
108 | */ |
109 | static inline void gxemul_irqc_unmask(uint32_t irq) |
109 | static inline void gxemul_irqc_unmask(uint32_t irq) |
110 | { |
110 | { |
111 | *(uint32_t*) gxemul_hw_map.irqc_unmask = irq; |
111 | *(uint32_t*) gxemul_hw_map.irqc_unmask = irq; |
112 | } |
112 | } |
113 | 113 | ||
114 | 114 | ||
115 | /** Initializes #gxemul_hw_map. */ |
115 | /** Initializes #gxemul_hw_map. */ |
116 | void gxemul_hw_map_init(void) |
116 | void gxemul_hw_map_init(void) |
117 | { |
117 | { |
118 | gxemul_hw_map.videoram = hw_map(GXEMUL_VIDEORAM, PAGE_SIZE); |
118 | gxemul_hw_map.videoram = hw_map(GXEMUL_VIDEORAM, PAGE_SIZE); |
119 | gxemul_hw_map.kbd = hw_map(GXEMUL_KBD, PAGE_SIZE); |
119 | gxemul_hw_map.kbd = hw_map(GXEMUL_KBD, PAGE_SIZE); |
120 | gxemul_hw_map.rtc = hw_map(GXEMUL_RTC, PAGE_SIZE); |
120 | gxemul_hw_map.rtc = hw_map(GXEMUL_RTC, PAGE_SIZE); |
121 | gxemul_hw_map.irqc = hw_map(GXEMUL_IRQC, PAGE_SIZE); |
121 | gxemul_hw_map.irqc = hw_map(GXEMUL_IRQC, PAGE_SIZE); |
122 | 122 | ||
123 | gxemul_hw_map.rtc_freq = gxemul_hw_map.rtc + GXEMUL_RTC_FREQ_OFFSET; |
123 | gxemul_hw_map.rtc_freq = gxemul_hw_map.rtc + GXEMUL_RTC_FREQ_OFFSET; |
124 | gxemul_hw_map.rtc_ack = gxemul_hw_map.rtc + GXEMUL_RTC_ACK_OFFSET; |
124 | gxemul_hw_map.rtc_ack = gxemul_hw_map.rtc + GXEMUL_RTC_ACK_OFFSET; |
125 | gxemul_hw_map.irqc_mask = gxemul_hw_map.irqc + GXEMUL_IRQC_MASK_OFFSET; |
125 | gxemul_hw_map.irqc_mask = gxemul_hw_map.irqc + GXEMUL_IRQC_MASK_OFFSET; |
126 | gxemul_hw_map.irqc_unmask = gxemul_hw_map.irqc + GXEMUL_IRQC_UNMASK_OFFSET; |
126 | gxemul_hw_map.irqc_unmask = gxemul_hw_map.irqc + GXEMUL_IRQC_UNMASK_OFFSET; |
127 | 127 | ||
128 | hw_map_init_called = true; |
128 | hw_map_init_called = true; |
129 | } |
129 | } |
130 | 130 | ||
131 | 131 | ||
132 | /** Putchar that works with gxemul. |
132 | /** Putchar that works with gxemul. |
133 | * |
133 | * |
134 | * @param dev Not used. |
134 | * @param dev Not used. |
135 | * @param ch Characted to be printed. |
135 | * @param ch Characted to be printed. |
136 | */ |
136 | */ |
137 | static void gxemul_write(chardev_t *dev, const char ch) |
137 | static void gxemul_write(chardev_t *dev, const char ch) |
138 | { |
138 | { |
139 | *((char *) gxemul_hw_map.videoram) = ch; |
139 | *((char *) gxemul_hw_map.videoram) = ch; |
140 | } |
140 | } |
141 | 141 | ||
142 | 142 | ||
143 | /** Enables gxemul keyboard (interrupt unmasked). |
143 | /** Enables gxemul keyboard (interrupt unmasked). |
144 | * |
144 | * |
145 | * @param dev Not used. |
145 | * @param dev Not used. |
146 | * |
146 | * |
147 | * Called from getc(). |
147 | * Called from getc(). |
148 | */ |
148 | */ |
149 | static void gxemul_kbd_enable(chardev_t *dev) |
149 | static void gxemul_kbd_enable(chardev_t *dev) |
150 | { |
150 | { |
151 | gxemul_irqc_unmask(GXEMUL_KBD_IRQ); |
151 | gxemul_irqc_unmask(GXEMUL_KBD_IRQ); |
152 | } |
152 | } |
153 | 153 | ||
154 | 154 | ||
155 | /** Disables gxemul keyboard (interrupt masked). |
155 | /** Disables gxemul keyboard (interrupt masked). |
156 | * |
156 | * |
157 | * @param dev not used |
157 | * @param dev not used |
158 | * |
158 | * |
159 | * Called from getc(). |
159 | * Called from getc(). |
160 | */ |
160 | */ |
161 | static void gxemul_kbd_disable(chardev_t *dev) |
161 | static void gxemul_kbd_disable(chardev_t *dev) |
162 | { |
162 | { |
163 | gxemul_irqc_mask(GXEMUL_KBD_IRQ); |
163 | gxemul_irqc_mask(GXEMUL_KBD_IRQ); |
164 | } |
164 | } |
165 | 165 | ||
166 | 166 | ||
167 | /** Read character using polling, assume interrupts disabled. |
167 | /** Read character using polling, assume interrupts disabled. |
168 | * |
168 | * |
169 | * @param dev Not used. |
169 | * @param dev Not used. |
170 | */ |
170 | */ |
171 | static char gxemul_do_read(chardev_t *dev) |
171 | static char gxemul_do_read(chardev_t *dev) |
172 | { |
172 | { |
173 | char ch; |
173 | char ch; |
174 | 174 | ||
175 | while (1) { |
175 | while (1) { |
176 | ch = *((volatile char *) gxemul_hw_map.kbd); |
176 | ch = *((volatile char *) gxemul_hw_map.kbd); |
177 | if (ch) { |
177 | if (ch) { |
178 | if (ch == '\r') |
178 | if (ch == '\r') |
179 | return '\n'; |
179 | return '\n'; |
180 | if (ch == 0x7f) |
180 | if (ch == 0x7f) |
181 | return '\b'; |
181 | return '\b'; |
182 | return ch; |
182 | return ch; |
183 | } |
183 | } |
184 | } |
184 | } |
185 | } |
185 | } |
186 | 186 | ||
187 | 187 | ||
188 | /** Process keyboard interrupt. |
188 | /** Process keyboard interrupt. |
189 | * |
189 | * |
190 | * @param irq IRQ information. |
190 | * @param irq IRQ information. |
191 | * @param arg Not used. |
191 | * @param arg Not used. |
192 | */ |
192 | */ |
193 | static void gxemul_irq_handler(irq_t *irq, void *arg, ...) |
193 | static void gxemul_irq_handler(irq_t *irq, void *arg, ...) |
194 | { |
194 | { |
195 | if ((irq->notif_cfg.notify) && (irq->notif_cfg.answerbox)) { |
195 | if ((irq->notif_cfg.notify) && (irq->notif_cfg.answerbox)) { |
196 | ipc_irq_send_notif(irq); |
196 | ipc_irq_send_notif(irq); |
197 | } else { |
197 | } else { |
198 | char ch = 0; |
198 | char ch = 0; |
199 | 199 | ||
200 | ch = *((char *) gxemul_hw_map.kbd); |
200 | ch = *((char *) gxemul_hw_map.kbd); |
201 | if (ch == '\r') { |
201 | if (ch == '\r') { |
202 | ch = '\n'; |
202 | ch = '\n'; |
203 | } |
203 | } |
204 | if (ch == 0x7f) { |
204 | if (ch == 0x7f) { |
205 | ch = '\b'; |
205 | ch = '\b'; |
206 | } |
206 | } |
207 | chardev_push_character(&console, ch); |
207 | chardev_push_character(&console, ch); |
208 | } |
208 | } |
209 | } |
209 | } |
210 | 210 | ||
211 | 211 | ||
212 | static irq_ownership_t gxemul_claim(void) |
212 | static irq_ownership_t gxemul_claim(void) |
213 | { |
213 | { |
214 | return IRQ_ACCEPT; |
214 | return IRQ_ACCEPT; |
215 | } |
215 | } |
216 | 216 | ||
217 | 217 | ||
218 | /** Acquire console back for kernel. */ |
218 | /** Acquire console back for kernel. */ |
219 | void gxemul_grab_console(void) |
219 | void gxemul_grab_console(void) |
220 | { |
220 | { |
221 | ipl_t ipl = interrupts_disable(); |
221 | ipl_t ipl = interrupts_disable(); |
222 | spinlock_lock(&gxemul_console_irq.lock); |
222 | spinlock_lock(&gxemul_console_irq.lock); |
223 | gxemul_console_irq.notif_cfg.notify = false; |
223 | gxemul_console_irq.notif_cfg.notify = false; |
224 | spinlock_unlock(&gxemul_console_irq.lock); |
224 | spinlock_unlock(&gxemul_console_irq.lock); |
225 | interrupts_restore(ipl); |
225 | interrupts_restore(ipl); |
226 | } |
226 | } |
227 | 227 | ||
228 | 228 | ||
229 | /** Return console to userspace. */ |
229 | /** Return console to userspace. */ |
230 | void gxemul_release_console(void) |
230 | void gxemul_release_console(void) |
231 | { |
231 | { |
232 | ipl_t ipl = interrupts_disable(); |
232 | ipl_t ipl = interrupts_disable(); |
233 | spinlock_lock(&gxemul_console_irq.lock); |
233 | spinlock_lock(&gxemul_console_irq.lock); |
234 | if (gxemul_console_irq.notif_cfg.answerbox) { |
234 | if (gxemul_console_irq.notif_cfg.answerbox) { |
235 | gxemul_console_irq.notif_cfg.notify = true; |
235 | gxemul_console_irq.notif_cfg.notify = true; |
236 | } |
236 | } |
237 | spinlock_unlock(&gxemul_console_irq.lock); |
237 | spinlock_unlock(&gxemul_console_irq.lock); |
238 | interrupts_restore(ipl); |
238 | interrupts_restore(ipl); |
239 | } |
239 | } |
240 | 240 | ||
241 | 241 | ||
242 | /** Initializes console object representing gxemul console. |
242 | /** Initializes console object representing gxemul console. |
243 | * |
243 | * |
244 | * @param devno device number. |
244 | * @param devno device number. |
245 | */ |
245 | */ |
246 | void gxemul_console_init(devno_t devno) |
246 | void gxemul_console_init(devno_t devno) |
247 | { |
247 | { |
248 | chardev_initialize("gxemul_console", &console, &gxemul_ops); |
248 | chardev_initialize("gxemul_console", &console, &gxemul_ops); |
249 | stdin = &console; |
249 | stdin = &console; |
250 | stdout = &console; |
250 | stdout = &console; |
251 | 251 | ||
252 | irq_initialize(&gxemul_console_irq); |
252 | irq_initialize(&gxemul_console_irq); |
253 | gxemul_console_irq.devno = devno; |
253 | gxemul_console_irq.devno = devno; |
254 | gxemul_console_irq.inr = GXEMUL_KBD_IRQ; |
254 | gxemul_console_irq.inr = GXEMUL_KBD_IRQ; |
255 | gxemul_console_irq.claim = gxemul_claim; |
255 | gxemul_console_irq.claim = gxemul_claim; |
256 | gxemul_console_irq.handler = gxemul_irq_handler; |
256 | gxemul_console_irq.handler = gxemul_irq_handler; |
257 | irq_register(&gxemul_console_irq); |
257 | irq_register(&gxemul_console_irq); |
258 | 258 | ||
259 | gxemul_irqc_unmask(GXEMUL_KBD_IRQ); |
259 | gxemul_irqc_unmask(GXEMUL_KBD_IRQ); |
260 | 260 | ||
261 | sysinfo_set_item_val("kbd", NULL, true); |
261 | sysinfo_set_item_val("kbd", NULL, true); |
262 | sysinfo_set_item_val("kbd.devno", NULL, devno); |
262 | sysinfo_set_item_val("kbd.devno", NULL, devno); |
263 | sysinfo_set_item_val("kbd.inr", NULL, GXEMUL_KBD_IRQ); |
263 | sysinfo_set_item_val("kbd.inr", NULL, GXEMUL_KBD_IRQ); |
264 | sysinfo_set_item_val("kbd.address.virtual", NULL, gxemul_hw_map.kbd); |
264 | sysinfo_set_item_val("kbd.address.virtual", NULL, gxemul_hw_map.kbd); |
265 | } |
265 | } |
266 | 266 | ||
267 | 267 | ||
268 | 268 | ||
269 | /** Starts gxemul Real Time Clock device, which asserts regular interrupts. |
269 | /** Starts gxemul Real Time Clock device, which asserts regular interrupts. |
270 | * |
270 | * |
271 | * @param frequency Interrupts frequency (0 disables RTC). |
271 | * @param frequency Interrupts frequency (0 disables RTC). |
272 | */ |
272 | */ |
273 | static void gxemul_timer_start(uint32_t frequency) |
273 | static void gxemul_timer_start(uint32_t frequency) |
274 | { |
274 | { |
275 | *(uint32_t*) gxemul_hw_map.rtc_freq = frequency; |
275 | *(uint32_t*) gxemul_hw_map.rtc_freq = frequency; |
276 | } |
276 | } |
277 | 277 | ||
278 | 278 | ||
279 | static irq_ownership_t gxemul_timer_claim(void) |
279 | static irq_ownership_t gxemul_timer_claim(void) |
280 | { |
280 | { |
281 | return IRQ_ACCEPT; |
281 | return IRQ_ACCEPT; |
282 | } |
282 | } |
283 | 283 | ||
284 | 284 | ||
285 | /** Timer interrupt handler. |
285 | /** Timer interrupt handler. |
286 | * |
286 | * |
287 | * @param irq Interrupt information. |
287 | * @param irq Interrupt information. |
288 | * @param arg Not used. |
288 | * @param arg Not used. |
289 | */ |
289 | */ |
290 | static void gxemul_timer_irq_handler(irq_t *irq, void *arg, ...) |
290 | static void gxemul_timer_irq_handler(irq_t *irq, void *arg, ...) |
291 | { |
291 | { |
292 | /* |
292 | /* |
293 | * We are holding a lock which prevents preemption. |
293 | * We are holding a lock which prevents preemption. |
294 | * Release the lock, call clock() and reacquire the lock again. |
294 | * Release the lock, call clock() and reacquire the lock again. |
295 | */ |
295 | */ |
296 | spinlock_unlock(&irq->lock); |
296 | spinlock_unlock(&irq->lock); |
297 | clock(); |
297 | clock(); |
298 | spinlock_lock(&irq->lock); |
298 | spinlock_lock(&irq->lock); |
299 | 299 | ||
300 | /* acknowledge tick */ |
300 | /* acknowledge tick */ |
301 | *(uint32_t*) gxemul_hw_map.rtc_ack = 0; |
301 | *(uint32_t*) gxemul_hw_map.rtc_ack = 0; |
302 | } |
302 | } |
303 | 303 | ||
304 | 304 | ||
305 | /** Initializes and registers timer interrupt handler. */ |
305 | /** Initializes and registers timer interrupt handler. */ |
306 | static void gxemul_timer_irq_init() |
306 | static void gxemul_timer_irq_init() |
307 | { |
307 | { |
308 | irq_initialize(&gxemul_timer_irq); |
308 | irq_initialize(&gxemul_timer_irq); |
309 | gxemul_timer_irq.devno = device_assign_devno(); |
309 | gxemul_timer_irq.devno = device_assign_devno(); |
310 | gxemul_timer_irq.inr = GXEMUL_TIMER_IRQ; |
310 | gxemul_timer_irq.inr = GXEMUL_TIMER_IRQ; |
311 | gxemul_timer_irq.claim = gxemul_timer_claim; |
311 | gxemul_timer_irq.claim = gxemul_timer_claim; |
312 | gxemul_timer_irq.handler = gxemul_timer_irq_handler; |
312 | gxemul_timer_irq.handler = gxemul_timer_irq_handler; |
313 | 313 | ||
314 | irq_register(&gxemul_timer_irq); |
314 | irq_register(&gxemul_timer_irq); |
315 | } |
315 | } |
316 | 316 | ||
317 | 317 | ||
318 | /** Starts timer. |
318 | /** Starts timer. |
319 | * |
319 | * |
320 | * Initiates regular timer interrupts after initializing |
320 | * Initiates regular timer interrupts after initializing |
321 | * corresponding interrupt handler. |
321 | * corresponding interrupt handler. |
322 | */ |
322 | */ |
323 | void gxemul_timer_irq_start() |
323 | void gxemul_timer_irq_start() |
324 | { |
324 | { |
325 | gxemul_timer_irq_init(); |
325 | gxemul_timer_irq_init(); |
326 | gxemul_timer_start(GXEMUL_TIMER_FREQ); |
326 | gxemul_timer_start(GXEMUL_TIMER_FREQ); |
327 | } |
327 | } |
328 | 328 | ||
329 | 329 | ||
330 | /** Returns the size of emulated memory. |
330 | /** Returns the size of emulated memory. |
331 | * |
331 | * |
332 | * @return Size in bytes. |
332 | * @return Size in bytes. |
333 | */ |
333 | */ |
334 | size_t gxemul_get_memory_size(void) |
334 | size_t gxemul_get_memory_size(void) |
335 | { |
335 | { |
336 | return *((int*)(GXEMUL_MP + GXEMUL_MP_MEMSIZE_OFFSET)); |
336 | return *((int*)(GXEMUL_MP + GXEMUL_MP_MEMSIZE_OFFSET)); |
337 | } |
337 | } |
338 | 338 | ||
339 | 339 | ||
340 | /** Prints a character. |
340 | /** Prints a character. |
341 | * |
341 | * |
342 | * @param ch Character to be printed. |
342 | * @param ch Character to be printed. |
343 | */ |
343 | */ |
344 | void gxemul_debug_putc(char ch) |
344 | void gxemul_debug_putc(char ch) |
345 | { |
345 | { |
346 | char * addr = 0; |
346 | char * addr = 0; |
347 | if (!hw_map_init_called) { |
347 | if (!hw_map_init_called) { |
348 | addr = (char *) GXEMUL_KBD; |
348 | addr = (char *) GXEMUL_KBD; |
349 | } else { |
349 | } else { |
350 | addr = (char *) gxemul_hw_map.videoram; |
350 | addr = (char *) gxemul_hw_map.videoram; |
351 | } |
351 | } |
352 | 352 | ||
353 | *(addr) = ch; |
353 | *(addr) = ch; |
354 | } |
354 | } |
355 | 355 | ||
356 | 356 | ||
357 | /** Stops gxemul. */ |
357 | /** Stops gxemul. */ |
358 | void gxemul_cpu_halt(void) |
358 | void gxemul_cpu_halt(void) |
359 | { |
359 | { |
360 | char * addr = 0; |
360 | char * addr = 0; |
361 | if (!hw_map_init_called) { |
361 | if (!hw_map_init_called) { |
362 | addr = (char *) GXEMUL_KBD; |
362 | addr = (char *) GXEMUL_KBD; |
363 | } else { |
363 | } else { |
364 | addr = (char *) gxemul_hw_map.videoram; |
364 | addr = (char *) gxemul_hw_map.videoram; |
365 | } |
365 | } |
366 | 366 | ||
367 | *(addr + GXEMUL_HALT_OFFSET) = '\0'; |
367 | *(addr + GXEMUL_HALT_OFFSET) = '\0'; |
368 | } |
368 | } |
369 | 369 | ||
370 | 370 | ||
371 | /** Gxemul specific interrupt exception handler. |
371 | /** Gxemul specific interrupt exception handler. |
372 | * |
372 | * |
373 | * Determines sources of the interrupt from interrupt controller and |
373 | * Determines sources of the interrupt from interrupt controller and |
374 | * calls high-level handlers for them. |
374 | * calls high-level handlers for them. |
375 | * |
375 | * |
376 | * @param exc_no Interrupt exception number. |
376 | * @param exc_no Interrupt exception number. |
377 | * @param istate Saved processor state. |
377 | * @param istate Saved processor state. |
378 | */ |
378 | */ |
379 | void gxemul_irq_exception(int exc_no, istate_t *istate) |
379 | void gxemul_irq_exception(int exc_no, istate_t *istate) |
380 | { |
380 | { |
381 | uint32_t sources = gxemul_irqc_get_sources(); |
381 | uint32_t sources = gxemul_irqc_get_sources(); |
382 | int i = 0; |
382 | int i = 0; |
383 | for (; i < GXEMUL_IRQC_MAX_IRQ; i++) { |
383 | for (; i < GXEMUL_IRQC_MAX_IRQ; i++) { |
384 | if (sources & (1 << i)) { |
384 | if (sources & (1 << i)) { |
385 | irq_t *irq = irq_dispatch_and_lock(i); |
385 | irq_t *irq = irq_dispatch_and_lock(i); |
386 | if (irq) { |
386 | if (irq) { |
387 | /* The IRQ handler was found. */ |
387 | /* The IRQ handler was found. */ |
388 | irq->handler(irq, irq->arg); |
388 | irq->handler(irq, irq->arg); |
389 | spinlock_unlock(&irq->lock); |
389 | spinlock_unlock(&irq->lock); |
390 | } else { |
390 | } else { |
391 | /* Spurious interrupt.*/ |
391 | /* Spurious interrupt.*/ |
392 | dprintf("cpu%d: spurious interrupt (inum=%d)\n", CPU->id, i); |
392 | dprintf("cpu%d: spurious interrupt (inum=%d)\n", CPU->id, i); |
393 | } |
393 | } |
394 | } |
394 | } |
395 | } |
395 | } |
396 | } |
396 | } |
397 | 397 | ||
398 | /** Returns address of framebuffer device. |
398 | /** Returns address of framebuffer device. |
399 | * |
399 | * |
400 | * @return Address of framebuffer device. |
400 | * @return Address of framebuffer device. |
401 | */ |
401 | */ |
402 | uintptr_t gxemul_get_fb_address(void) |
402 | uintptr_t gxemul_get_fb_address(void) |
403 | { |
403 | { |
404 | return (uintptr_t) GXEMUL_FB; |
404 | return (uintptr_t) GXEMUL_FB; |
405 | } |
405 | } |
406 | 406 | ||
407 | /** @} |
407 | /** @} |
408 | */ |
408 | */ |
409 | 409 |