Details | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
2215 | kebrt | 1 | /* |
2263 | kebrt | 2 | * Copyright (c) 2007 Michal Kebrt, Petr Stepan |
2215 | kebrt | 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 | * |
||
9 | * - Redistributions of source code must retain the above copyright |
||
10 | * notice, this list of conditions and the following disclaimer. |
||
11 | * - Redistributions in binary form must reproduce the above copyright |
||
12 | * notice, this list of conditions and the following disclaimer in the |
||
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 |
||
15 | * derived from this software without specific prior written permission. |
||
16 | * |
||
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 |
||
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
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 |
||
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 |
||
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
27 | */ |
||
28 | |||
2419 | kebrt | 29 | /** @addtogroup arm32gxemul |
2215 | kebrt | 30 | * @{ |
31 | */ |
||
32 | /** @file |
||
2410 | stepan | 33 | * @brief GXemul drivers. |
2215 | kebrt | 34 | */ |
35 | |||
36 | #include <interrupt.h> |
||
37 | #include <console/chardev.h> |
||
38 | #include <arch/drivers/gxemul.h> |
||
39 | #include <console/console.h> |
||
40 | #include <sysinfo/sysinfo.h> |
||
41 | #include <print.h> |
||
2245 | stepan | 42 | #include <ddi/device.h> |
2263 | kebrt | 43 | #include <mm/page.h> |
2274 | kebrt | 44 | #include <arch/machine.h> |
2326 | kebrt | 45 | #include <arch/debug/print.h> |
2215 | kebrt | 46 | |
2414 | kebrt | 47 | /* Addresses of devices. */ |
2263 | kebrt | 48 | #define GXEMUL_VIDEORAM 0x10000000 |
49 | #define GXEMUL_KBD 0x10000000 |
||
2300 | kebrt | 50 | #define GXEMUL_HALT_OFFSET 0x10 |
2263 | kebrt | 51 | #define GXEMUL_RTC 0x15000000 |
52 | #define GXEMUL_RTC_FREQ_OFFSET 0x100 |
||
53 | #define GXEMUL_RTC_ACK_OFFSET 0x110 |
||
54 | #define GXEMUL_IRQC 0x16000000 |
||
55 | #define GXEMUL_IRQC_MASK_OFFSET 0x4 |
||
56 | #define GXEMUL_IRQC_UNMASK_OFFSET 0x8 |
||
57 | #define GXEMUL_MP 0x11000000 |
||
58 | #define GXEMUL_MP_MEMSIZE_OFFSET 0x0090 |
||
2340 | kebrt | 59 | #define GXEMUL_FB 0x12000000 |
2215 | kebrt | 60 | |
2414 | kebrt | 61 | /* IRQs */ |
2245 | stepan | 62 | #define GXEMUL_KBD_IRQ 2 |
63 | #define GXEMUL_TIMER_IRQ 4 |
||
64 | |||
2263 | kebrt | 65 | static gxemul_hw_map_t gxemul_hw_map; |
2215 | kebrt | 66 | static chardev_t console; |
2414 | kebrt | 67 | static irq_t gxemul_console_irq; |
2245 | stepan | 68 | static irq_t gxemul_timer_irq; |
2215 | kebrt | 69 | |
2290 | kebrt | 70 | static bool hw_map_init_called = false; |
71 | |||
2414 | kebrt | 72 | static void gxemul_kbd_enable(chardev_t *dev); |
73 | static void gxemul_kbd_disable(chardev_t *dev); |
||
3868 | jermar | 74 | static void gxemul_write(chardev_t *dev, const char ch, bool silent); |
2215 | kebrt | 75 | static char gxemul_do_read(chardev_t *dev); |
76 | |||
77 | static chardev_operations_t gxemul_ops = { |
||
2414 | kebrt | 78 | .resume = gxemul_kbd_enable, |
79 | .suspend = gxemul_kbd_disable, |
||
2215 | kebrt | 80 | .write = gxemul_write, |
81 | .read = gxemul_do_read, |
||
82 | }; |
||
83 | |||
2357 | kebrt | 84 | |
2355 | stepan | 85 | /** Returns the mask of active interrupts. */ |
2340 | kebrt | 86 | static inline uint32_t gxemul_irqc_get_sources(void) |
87 | { |
||
2464 | jermar | 88 | return *((uint32_t *) gxemul_hw_map.irqc); |
2340 | kebrt | 89 | } |
2263 | kebrt | 90 | |
2357 | kebrt | 91 | |
2340 | kebrt | 92 | /** Masks interrupt. |
93 | * |
||
94 | * @param irq interrupt number |
||
95 | */ |
||
96 | static inline void gxemul_irqc_mask(uint32_t irq) |
||
97 | { |
||
2464 | jermar | 98 | *((uint32_t *) gxemul_hw_map.irqc_mask) = irq; |
2340 | kebrt | 99 | } |
100 | |||
2357 | kebrt | 101 | |
2340 | kebrt | 102 | /** Unmasks interrupt. |
103 | * |
||
104 | * @param irq interrupt number |
||
105 | */ |
||
106 | static inline void gxemul_irqc_unmask(uint32_t irq) |
||
107 | { |
||
2464 | jermar | 108 | *((uint32_t *) gxemul_hw_map.irqc_unmask) = irq; |
2340 | kebrt | 109 | } |
110 | |||
2357 | kebrt | 111 | |
2263 | kebrt | 112 | /** Initializes #gxemul_hw_map. */ |
2358 | kebrt | 113 | void gxemul_hw_map_init(void) |
2263 | kebrt | 114 | { |
115 | gxemul_hw_map.videoram = hw_map(GXEMUL_VIDEORAM, PAGE_SIZE); |
||
116 | gxemul_hw_map.kbd = hw_map(GXEMUL_KBD, PAGE_SIZE); |
||
117 | gxemul_hw_map.rtc = hw_map(GXEMUL_RTC, PAGE_SIZE); |
||
118 | gxemul_hw_map.irqc = hw_map(GXEMUL_IRQC, PAGE_SIZE); |
||
119 | |||
120 | gxemul_hw_map.rtc_freq = gxemul_hw_map.rtc + GXEMUL_RTC_FREQ_OFFSET; |
||
121 | gxemul_hw_map.rtc_ack = gxemul_hw_map.rtc + GXEMUL_RTC_ACK_OFFSET; |
||
122 | gxemul_hw_map.irqc_mask = gxemul_hw_map.irqc + GXEMUL_IRQC_MASK_OFFSET; |
||
2464 | jermar | 123 | gxemul_hw_map.irqc_unmask = gxemul_hw_map.irqc + |
124 | GXEMUL_IRQC_UNMASK_OFFSET; |
||
2264 | kebrt | 125 | |
2290 | kebrt | 126 | hw_map_init_called = true; |
2263 | kebrt | 127 | } |
128 | |||
2357 | kebrt | 129 | |
2414 | kebrt | 130 | /** Putchar that works with gxemul. |
131 | * |
||
132 | * @param dev Not used. |
||
133 | * @param ch Characted to be printed. |
||
134 | */ |
||
3844 | decky | 135 | static void gxemul_write(chardev_t *dev, const char ch, bool silent) |
2215 | kebrt | 136 | { |
3844 | decky | 137 | if (!silent) |
138 | *((char *) gxemul_hw_map.videoram) = ch; |
||
2215 | kebrt | 139 | } |
140 | |||
2414 | kebrt | 141 | /** Enables gxemul keyboard (interrupt unmasked). |
142 | * |
||
143 | * @param dev Not used. |
||
144 | * |
||
145 | * Called from getc(). |
||
146 | */ |
||
147 | static void gxemul_kbd_enable(chardev_t *dev) |
||
2215 | kebrt | 148 | { |
2245 | stepan | 149 | gxemul_irqc_unmask(GXEMUL_KBD_IRQ); |
2215 | kebrt | 150 | } |
151 | |||
2414 | kebrt | 152 | /** Disables gxemul keyboard (interrupt masked). |
153 | * |
||
154 | * @param dev not used |
||
155 | * |
||
156 | * Called from getc(). |
||
157 | */ |
||
158 | static void gxemul_kbd_disable(chardev_t *dev) |
||
2215 | kebrt | 159 | { |
2245 | stepan | 160 | gxemul_irqc_mask(GXEMUL_KBD_IRQ); |
2215 | kebrt | 161 | } |
162 | |||
2357 | kebrt | 163 | /** Read character using polling, assume interrupts disabled. |
164 | * |
||
165 | * @param dev Not used. |
||
166 | */ |
||
2215 | kebrt | 167 | static char gxemul_do_read(chardev_t *dev) |
168 | { |
||
169 | char ch; |
||
170 | |||
171 | while (1) { |
||
2263 | kebrt | 172 | ch = *((volatile char *) gxemul_hw_map.kbd); |
2215 | kebrt | 173 | if (ch) { |
174 | if (ch == '\r') |
||
175 | return '\n'; |
||
176 | if (ch == 0x7f) |
||
177 | return '\b'; |
||
178 | return ch; |
||
179 | } |
||
180 | } |
||
181 | } |
||
182 | |||
2414 | kebrt | 183 | /** Process keyboard interrupt. |
184 | * |
||
185 | * @param irq IRQ information. |
||
186 | */ |
||
3906 | jermar | 187 | static void gxemul_irq_handler(irq_t *irq) |
2215 | kebrt | 188 | { |
3951 | jermar | 189 | char ch = 0; |
2215 | kebrt | 190 | |
3951 | jermar | 191 | ch = *((char *) gxemul_hw_map.kbd); |
192 | if (ch == '\r') { |
||
193 | ch = '\n'; |
||
2215 | kebrt | 194 | } |
3951 | jermar | 195 | if (ch == 0x7f) { |
196 | ch = '\b'; |
||
197 | } |
||
198 | chardev_push_character(&console, ch); |
||
2215 | kebrt | 199 | } |
200 | |||
3941 | jermar | 201 | static irq_ownership_t gxemul_claim(irq_t *irq) |
2215 | kebrt | 202 | { |
203 | return IRQ_ACCEPT; |
||
204 | } |
||
205 | |||
2357 | kebrt | 206 | /** Initializes console object representing gxemul console. |
207 | * |
||
2418 | kebrt | 208 | * @param devno device number. |
2357 | kebrt | 209 | */ |
2358 | kebrt | 210 | void gxemul_console_init(devno_t devno) |
2215 | kebrt | 211 | { |
2263 | kebrt | 212 | chardev_initialize("gxemul_console", &console, &gxemul_ops); |
2215 | kebrt | 213 | stdin = &console; |
214 | stdout = &console; |
||
215 | |||
2414 | kebrt | 216 | irq_initialize(&gxemul_console_irq); |
217 | gxemul_console_irq.devno = devno; |
||
218 | gxemul_console_irq.inr = GXEMUL_KBD_IRQ; |
||
219 | gxemul_console_irq.claim = gxemul_claim; |
||
220 | gxemul_console_irq.handler = gxemul_irq_handler; |
||
221 | irq_register(&gxemul_console_irq); |
||
2215 | kebrt | 222 | |
2245 | stepan | 223 | gxemul_irqc_unmask(GXEMUL_KBD_IRQ); |
2215 | kebrt | 224 | |
225 | sysinfo_set_item_val("kbd", NULL, true); |
||
226 | sysinfo_set_item_val("kbd.devno", NULL, devno); |
||
227 | sysinfo_set_item_val("kbd.inr", NULL, GXEMUL_KBD_IRQ); |
||
2263 | kebrt | 228 | sysinfo_set_item_val("kbd.address.virtual", NULL, gxemul_hw_map.kbd); |
2215 | kebrt | 229 | } |
230 | |||
2245 | stepan | 231 | /** Starts gxemul Real Time Clock device, which asserts regular interrupts. |
232 | * |
||
2357 | kebrt | 233 | * @param frequency Interrupts frequency (0 disables RTC). |
2245 | stepan | 234 | */ |
2340 | kebrt | 235 | static void gxemul_timer_start(uint32_t frequency) |
2245 | stepan | 236 | { |
2464 | jermar | 237 | *((uint32_t*) gxemul_hw_map.rtc_freq) = frequency; |
2245 | stepan | 238 | } |
239 | |||
3941 | jermar | 240 | static irq_ownership_t gxemul_timer_claim(irq_t *irq) |
2245 | stepan | 241 | { |
242 | return IRQ_ACCEPT; |
||
243 | } |
||
244 | |||
2355 | stepan | 245 | /** Timer interrupt handler. |
246 | * |
||
2357 | kebrt | 247 | * @param irq Interrupt information. |
248 | * @param arg Not used. |
||
2355 | stepan | 249 | */ |
3906 | jermar | 250 | static void gxemul_timer_irq_handler(irq_t *irq) |
2245 | stepan | 251 | { |
252 | /* |
||
253 | * We are holding a lock which prevents preemption. |
||
254 | * Release the lock, call clock() and reacquire the lock again. |
||
255 | */ |
||
256 | spinlock_unlock(&irq->lock); |
||
2286 | stepan | 257 | clock(); |
2245 | stepan | 258 | spinlock_lock(&irq->lock); |
2261 | stepan | 259 | |
260 | /* acknowledge tick */ |
||
2464 | jermar | 261 | *((uint32_t*) gxemul_hw_map.rtc_ack) = 0; |
2245 | stepan | 262 | } |
263 | |||
2357 | kebrt | 264 | /** Initializes and registers timer interrupt handler. */ |
2464 | jermar | 265 | static void gxemul_timer_irq_init(void) |
2245 | stepan | 266 | { |
267 | irq_initialize(&gxemul_timer_irq); |
||
268 | gxemul_timer_irq.devno = device_assign_devno(); |
||
269 | gxemul_timer_irq.inr = GXEMUL_TIMER_IRQ; |
||
270 | gxemul_timer_irq.claim = gxemul_timer_claim; |
||
271 | gxemul_timer_irq.handler = gxemul_timer_irq_handler; |
||
2261 | stepan | 272 | |
2245 | stepan | 273 | irq_register(&gxemul_timer_irq); |
274 | } |
||
275 | |||
2357 | kebrt | 276 | |
2355 | stepan | 277 | /** Starts timer. |
278 | * |
||
279 | * Initiates regular timer interrupts after initializing |
||
280 | * corresponding interrupt handler. |
||
281 | */ |
||
2464 | jermar | 282 | void gxemul_timer_irq_start(void) |
2263 | kebrt | 283 | { |
2274 | kebrt | 284 | gxemul_timer_irq_init(); |
285 | gxemul_timer_start(GXEMUL_TIMER_FREQ); |
||
286 | } |
||
287 | |||
2355 | stepan | 288 | /** Returns the size of emulated memory. |
289 | * |
||
2357 | kebrt | 290 | * @return Size in bytes. |
2355 | stepan | 291 | */ |
2358 | kebrt | 292 | size_t gxemul_get_memory_size(void) |
2274 | kebrt | 293 | { |
2464 | jermar | 294 | return *((int *) (GXEMUL_MP + GXEMUL_MP_MEMSIZE_OFFSET)); |
2263 | kebrt | 295 | } |
2245 | stepan | 296 | |
2412 | kebrt | 297 | /** Prints a character. |
298 | * |
||
299 | * @param ch Character to be printed. |
||
300 | */ |
||
2358 | kebrt | 301 | void gxemul_debug_putc(char ch) |
2300 | kebrt | 302 | { |
2464 | jermar | 303 | char *addr = 0; |
2290 | kebrt | 304 | if (!hw_map_init_called) { |
2300 | kebrt | 305 | addr = (char *) GXEMUL_KBD; |
2290 | kebrt | 306 | } else { |
2300 | kebrt | 307 | addr = (char *) gxemul_hw_map.videoram; |
2290 | kebrt | 308 | } |
2300 | kebrt | 309 | |
310 | *(addr) = ch; |
||
2264 | kebrt | 311 | } |
312 | |||
2355 | stepan | 313 | /** Stops gxemul. */ |
2358 | kebrt | 314 | void gxemul_cpu_halt(void) |
2300 | kebrt | 315 | { |
316 | char * addr = 0; |
||
317 | if (!hw_map_init_called) { |
||
318 | addr = (char *) GXEMUL_KBD; |
||
319 | } else { |
||
320 | addr = (char *) gxemul_hw_map.videoram; |
||
321 | } |
||
322 | |||
323 | *(addr + GXEMUL_HALT_OFFSET) = '\0'; |
||
324 | } |
||
325 | |||
2355 | stepan | 326 | /** Gxemul specific interrupt exception handler. |
327 | * |
||
328 | * Determines sources of the interrupt from interrupt controller and |
||
329 | * calls high-level handlers for them. |
||
330 | * |
||
2357 | kebrt | 331 | * @param exc_no Interrupt exception number. |
332 | * @param istate Saved processor state. |
||
2355 | stepan | 333 | */ |
2358 | kebrt | 334 | void gxemul_irq_exception(int exc_no, istate_t *istate) |
2306 | kebrt | 335 | { |
336 | uint32_t sources = gxemul_irqc_get_sources(); |
||
2464 | jermar | 337 | int i; |
338 | |||
339 | for (i = 0; i < GXEMUL_IRQC_MAX_IRQ; i++) { |
||
2306 | kebrt | 340 | if (sources & (1 << i)) { |
341 | irq_t *irq = irq_dispatch_and_lock(i); |
||
342 | if (irq) { |
||
343 | /* The IRQ handler was found. */ |
||
3906 | jermar | 344 | irq->handler(irq); |
2306 | kebrt | 345 | spinlock_unlock(&irq->lock); |
346 | } else { |
||
347 | /* Spurious interrupt.*/ |
||
2464 | jermar | 348 | dprintf("cpu%d: spurious interrupt (inum=%d)\n", |
349 | CPU->id, i); |
||
2306 | kebrt | 350 | } |
351 | } |
||
352 | } |
||
353 | } |
||
354 | |||
2412 | kebrt | 355 | /** Returns address of framebuffer device. |
356 | * |
||
357 | * @return Address of framebuffer device. |
||
358 | */ |
||
2358 | kebrt | 359 | uintptr_t gxemul_get_fb_address(void) |
2357 | kebrt | 360 | { |
2360 | kebrt | 361 | return (uintptr_t) GXEMUL_FB; |
2357 | kebrt | 362 | } |
363 | |||
2215 | kebrt | 364 | /** @} |
365 | */ |