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Rev | Author | Line No. | Line |
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2215 | kebrt | 1 | /* |
2263 | kebrt | 2 | * Copyright (c) 2007 Michal Kebrt, Petr Stepan |
2215 | kebrt | 3 | * All rights reserved. |
4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
2419 | kebrt | 29 | /** @addtogroup arm32gxemul |
2215 | kebrt | 30 | * @{ |
31 | */ |
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32 | /** @file |
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2410 | stepan | 33 | * @brief GXemul drivers. |
2215 | kebrt | 34 | */ |
35 | |||
36 | #include <interrupt.h> |
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37 | #include <ipc/irq.h> |
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38 | #include <console/chardev.h> |
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39 | #include <arch/drivers/gxemul.h> |
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40 | #include <console/console.h> |
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41 | #include <sysinfo/sysinfo.h> |
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42 | #include <print.h> |
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2245 | stepan | 43 | #include <ddi/device.h> |
2263 | kebrt | 44 | #include <mm/page.h> |
2274 | kebrt | 45 | #include <arch/machine.h> |
2326 | kebrt | 46 | #include <arch/debug/print.h> |
3529 | pillai | 47 | #include <genarch/fb/fb.h> |
48 | #include <genarch/fb/visuals.h> |
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2215 | kebrt | 49 | |
2414 | kebrt | 50 | /* Addresses of devices. */ |
2263 | kebrt | 51 | #define GXEMUL_VIDEORAM 0x10000000 |
52 | #define GXEMUL_KBD 0x10000000 |
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2300 | kebrt | 53 | #define GXEMUL_HALT_OFFSET 0x10 |
2263 | kebrt | 54 | #define GXEMUL_RTC 0x15000000 |
55 | #define GXEMUL_RTC_FREQ_OFFSET 0x100 |
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56 | #define GXEMUL_RTC_ACK_OFFSET 0x110 |
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57 | #define GXEMUL_IRQC 0x16000000 |
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58 | #define GXEMUL_IRQC_MASK_OFFSET 0x4 |
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59 | #define GXEMUL_IRQC_UNMASK_OFFSET 0x8 |
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60 | #define GXEMUL_MP 0x11000000 |
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61 | #define GXEMUL_MP_MEMSIZE_OFFSET 0x0090 |
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2340 | kebrt | 62 | #define GXEMUL_FB 0x12000000 |
2215 | kebrt | 63 | |
2414 | kebrt | 64 | /* IRQs */ |
2245 | stepan | 65 | #define GXEMUL_KBD_IRQ 2 |
66 | #define GXEMUL_TIMER_IRQ 4 |
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67 | |||
2263 | kebrt | 68 | static gxemul_hw_map_t gxemul_hw_map; |
2215 | kebrt | 69 | static chardev_t console; |
2414 | kebrt | 70 | static irq_t gxemul_console_irq; |
2245 | stepan | 71 | static irq_t gxemul_timer_irq; |
2215 | kebrt | 72 | |
2290 | kebrt | 73 | static bool hw_map_init_called = false; |
74 | |||
2414 | kebrt | 75 | static void gxemul_kbd_enable(chardev_t *dev); |
76 | static void gxemul_kbd_disable(chardev_t *dev); |
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2215 | kebrt | 77 | static void gxemul_write(chardev_t *dev, const char ch); |
78 | static char gxemul_do_read(chardev_t *dev); |
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79 | |||
80 | static chardev_operations_t gxemul_ops = { |
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2414 | kebrt | 81 | .resume = gxemul_kbd_enable, |
82 | .suspend = gxemul_kbd_disable, |
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2215 | kebrt | 83 | .write = gxemul_write, |
84 | .read = gxemul_do_read, |
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85 | }; |
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86 | |||
2357 | kebrt | 87 | |
2355 | stepan | 88 | /** Returns the mask of active interrupts. */ |
2340 | kebrt | 89 | static inline uint32_t gxemul_irqc_get_sources(void) |
90 | { |
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2464 | jermar | 91 | return *((uint32_t *) gxemul_hw_map.irqc); |
2340 | kebrt | 92 | } |
2263 | kebrt | 93 | |
2357 | kebrt | 94 | |
2340 | kebrt | 95 | /** Masks interrupt. |
96 | * |
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97 | * @param irq interrupt number |
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98 | */ |
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99 | static inline void gxemul_irqc_mask(uint32_t irq) |
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100 | { |
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2464 | jermar | 101 | *((uint32_t *) gxemul_hw_map.irqc_mask) = irq; |
2340 | kebrt | 102 | } |
103 | |||
2357 | kebrt | 104 | |
2340 | kebrt | 105 | /** Unmasks interrupt. |
106 | * |
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107 | * @param irq interrupt number |
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108 | */ |
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109 | static inline void gxemul_irqc_unmask(uint32_t irq) |
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110 | { |
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2464 | jermar | 111 | *((uint32_t *) gxemul_hw_map.irqc_unmask) = irq; |
2340 | kebrt | 112 | } |
113 | |||
3529 | pillai | 114 | /** Initializes the gxemul testarm frame buffer */ |
115 | void gxemul_fb_init(void) |
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116 | { |
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117 | fb_init(gxemul_get_fb_address(), 640, 480, 1920, VISUAL_RGB_8_8_8); |
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118 | } |
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2357 | kebrt | 119 | |
2263 | kebrt | 120 | /** Initializes #gxemul_hw_map. */ |
2358 | kebrt | 121 | void gxemul_hw_map_init(void) |
2263 | kebrt | 122 | { |
123 | gxemul_hw_map.videoram = hw_map(GXEMUL_VIDEORAM, PAGE_SIZE); |
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124 | gxemul_hw_map.kbd = hw_map(GXEMUL_KBD, PAGE_SIZE); |
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125 | gxemul_hw_map.rtc = hw_map(GXEMUL_RTC, PAGE_SIZE); |
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126 | gxemul_hw_map.irqc = hw_map(GXEMUL_IRQC, PAGE_SIZE); |
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127 | |||
128 | gxemul_hw_map.rtc_freq = gxemul_hw_map.rtc + GXEMUL_RTC_FREQ_OFFSET; |
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129 | gxemul_hw_map.rtc_ack = gxemul_hw_map.rtc + GXEMUL_RTC_ACK_OFFSET; |
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130 | gxemul_hw_map.irqc_mask = gxemul_hw_map.irqc + GXEMUL_IRQC_MASK_OFFSET; |
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2464 | jermar | 131 | gxemul_hw_map.irqc_unmask = gxemul_hw_map.irqc + |
132 | GXEMUL_IRQC_UNMASK_OFFSET; |
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2264 | kebrt | 133 | |
2290 | kebrt | 134 | hw_map_init_called = true; |
2263 | kebrt | 135 | } |
136 | |||
2357 | kebrt | 137 | |
2414 | kebrt | 138 | /** Putchar that works with gxemul. |
139 | * |
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140 | * @param dev Not used. |
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141 | * @param ch Characted to be printed. |
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142 | */ |
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2340 | kebrt | 143 | static void gxemul_write(chardev_t *dev, const char ch) |
2215 | kebrt | 144 | { |
2263 | kebrt | 145 | *((char *) gxemul_hw_map.videoram) = ch; |
2215 | kebrt | 146 | } |
147 | |||
2414 | kebrt | 148 | /** Enables gxemul keyboard (interrupt unmasked). |
149 | * |
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150 | * @param dev Not used. |
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151 | * |
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152 | * Called from getc(). |
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153 | */ |
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154 | static void gxemul_kbd_enable(chardev_t *dev) |
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2215 | kebrt | 155 | { |
2245 | stepan | 156 | gxemul_irqc_unmask(GXEMUL_KBD_IRQ); |
2215 | kebrt | 157 | } |
158 | |||
2414 | kebrt | 159 | /** Disables gxemul keyboard (interrupt masked). |
160 | * |
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161 | * @param dev not used |
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162 | * |
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163 | * Called from getc(). |
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164 | */ |
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165 | static void gxemul_kbd_disable(chardev_t *dev) |
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2215 | kebrt | 166 | { |
2245 | stepan | 167 | gxemul_irqc_mask(GXEMUL_KBD_IRQ); |
2215 | kebrt | 168 | } |
169 | |||
2357 | kebrt | 170 | /** Read character using polling, assume interrupts disabled. |
171 | * |
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172 | * @param dev Not used. |
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173 | */ |
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2215 | kebrt | 174 | static char gxemul_do_read(chardev_t *dev) |
175 | { |
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176 | char ch; |
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177 | |||
178 | while (1) { |
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2263 | kebrt | 179 | ch = *((volatile char *) gxemul_hw_map.kbd); |
2215 | kebrt | 180 | if (ch) { |
181 | if (ch == '\r') |
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182 | return '\n'; |
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183 | if (ch == 0x7f) |
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184 | return '\b'; |
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185 | return ch; |
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186 | } |
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187 | } |
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188 | } |
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189 | |||
2414 | kebrt | 190 | /** Process keyboard interrupt. |
191 | * |
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192 | * @param irq IRQ information. |
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193 | * @param arg Not used. |
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194 | */ |
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2215 | kebrt | 195 | static void gxemul_irq_handler(irq_t *irq, void *arg, ...) |
196 | { |
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2357 | kebrt | 197 | if ((irq->notif_cfg.notify) && (irq->notif_cfg.answerbox)) { |
2215 | kebrt | 198 | ipc_irq_send_notif(irq); |
2357 | kebrt | 199 | } else { |
2215 | kebrt | 200 | char ch = 0; |
201 | |||
2357 | kebrt | 202 | ch = *((char *) gxemul_hw_map.kbd); |
203 | if (ch == '\r') { |
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204 | ch = '\n'; |
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205 | } |
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206 | if (ch == 0x7f) { |
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207 | ch = '\b'; |
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208 | } |
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209 | chardev_push_character(&console, ch); |
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2215 | kebrt | 210 | } |
211 | } |
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212 | |||
213 | static irq_ownership_t gxemul_claim(void) |
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214 | { |
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215 | return IRQ_ACCEPT; |
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216 | } |
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217 | |||
2357 | kebrt | 218 | |
2412 | kebrt | 219 | /** Acquire console back for kernel. */ |
2358 | kebrt | 220 | void gxemul_grab_console(void) |
2215 | kebrt | 221 | { |
222 | ipl_t ipl = interrupts_disable(); |
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2414 | kebrt | 223 | spinlock_lock(&gxemul_console_irq.lock); |
224 | gxemul_console_irq.notif_cfg.notify = false; |
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225 | spinlock_unlock(&gxemul_console_irq.lock); |
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2215 | kebrt | 226 | interrupts_restore(ipl); |
227 | } |
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228 | |||
2412 | kebrt | 229 | /** Return console to userspace. */ |
2358 | kebrt | 230 | void gxemul_release_console(void) |
2215 | kebrt | 231 | { |
232 | ipl_t ipl = interrupts_disable(); |
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2414 | kebrt | 233 | spinlock_lock(&gxemul_console_irq.lock); |
234 | if (gxemul_console_irq.notif_cfg.answerbox) { |
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235 | gxemul_console_irq.notif_cfg.notify = true; |
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2357 | kebrt | 236 | } |
2414 | kebrt | 237 | spinlock_unlock(&gxemul_console_irq.lock); |
2215 | kebrt | 238 | interrupts_restore(ipl); |
239 | } |
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240 | |||
2357 | kebrt | 241 | /** Initializes console object representing gxemul console. |
242 | * |
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2418 | kebrt | 243 | * @param devno device number. |
2357 | kebrt | 244 | */ |
2358 | kebrt | 245 | void gxemul_console_init(devno_t devno) |
2215 | kebrt | 246 | { |
2263 | kebrt | 247 | chardev_initialize("gxemul_console", &console, &gxemul_ops); |
2215 | kebrt | 248 | stdin = &console; |
249 | stdout = &console; |
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250 | |||
2414 | kebrt | 251 | irq_initialize(&gxemul_console_irq); |
252 | gxemul_console_irq.devno = devno; |
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253 | gxemul_console_irq.inr = GXEMUL_KBD_IRQ; |
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254 | gxemul_console_irq.claim = gxemul_claim; |
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255 | gxemul_console_irq.handler = gxemul_irq_handler; |
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256 | irq_register(&gxemul_console_irq); |
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2215 | kebrt | 257 | |
2245 | stepan | 258 | gxemul_irqc_unmask(GXEMUL_KBD_IRQ); |
2215 | kebrt | 259 | |
260 | sysinfo_set_item_val("kbd", NULL, true); |
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261 | sysinfo_set_item_val("kbd.devno", NULL, devno); |
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262 | sysinfo_set_item_val("kbd.inr", NULL, GXEMUL_KBD_IRQ); |
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2263 | kebrt | 263 | sysinfo_set_item_val("kbd.address.virtual", NULL, gxemul_hw_map.kbd); |
2215 | kebrt | 264 | } |
265 | |||
2245 | stepan | 266 | /** Starts gxemul Real Time Clock device, which asserts regular interrupts. |
267 | * |
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2357 | kebrt | 268 | * @param frequency Interrupts frequency (0 disables RTC). |
2245 | stepan | 269 | */ |
2340 | kebrt | 270 | static void gxemul_timer_start(uint32_t frequency) |
2245 | stepan | 271 | { |
2464 | jermar | 272 | *((uint32_t*) gxemul_hw_map.rtc_freq) = frequency; |
2245 | stepan | 273 | } |
274 | |||
275 | static irq_ownership_t gxemul_timer_claim(void) |
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276 | { |
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277 | return IRQ_ACCEPT; |
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278 | } |
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279 | |||
2355 | stepan | 280 | /** Timer interrupt handler. |
281 | * |
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2357 | kebrt | 282 | * @param irq Interrupt information. |
283 | * @param arg Not used. |
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2355 | stepan | 284 | */ |
2245 | stepan | 285 | static void gxemul_timer_irq_handler(irq_t *irq, void *arg, ...) |
286 | { |
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287 | /* |
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288 | * We are holding a lock which prevents preemption. |
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289 | * Release the lock, call clock() and reacquire the lock again. |
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290 | */ |
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291 | spinlock_unlock(&irq->lock); |
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2286 | stepan | 292 | clock(); |
2245 | stepan | 293 | spinlock_lock(&irq->lock); |
2261 | stepan | 294 | |
295 | /* acknowledge tick */ |
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2464 | jermar | 296 | *((uint32_t*) gxemul_hw_map.rtc_ack) = 0; |
2245 | stepan | 297 | } |
298 | |||
2357 | kebrt | 299 | /** Initializes and registers timer interrupt handler. */ |
2464 | jermar | 300 | static void gxemul_timer_irq_init(void) |
2245 | stepan | 301 | { |
302 | irq_initialize(&gxemul_timer_irq); |
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303 | gxemul_timer_irq.devno = device_assign_devno(); |
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304 | gxemul_timer_irq.inr = GXEMUL_TIMER_IRQ; |
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305 | gxemul_timer_irq.claim = gxemul_timer_claim; |
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306 | gxemul_timer_irq.handler = gxemul_timer_irq_handler; |
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2261 | stepan | 307 | |
2245 | stepan | 308 | irq_register(&gxemul_timer_irq); |
309 | } |
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310 | |||
2357 | kebrt | 311 | |
2355 | stepan | 312 | /** Starts timer. |
313 | * |
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314 | * Initiates regular timer interrupts after initializing |
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315 | * corresponding interrupt handler. |
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316 | */ |
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2464 | jermar | 317 | void gxemul_timer_irq_start(void) |
2263 | kebrt | 318 | { |
2274 | kebrt | 319 | gxemul_timer_irq_init(); |
320 | gxemul_timer_start(GXEMUL_TIMER_FREQ); |
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321 | } |
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322 | |||
2355 | stepan | 323 | /** Returns the size of emulated memory. |
324 | * |
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2357 | kebrt | 325 | * @return Size in bytes. |
2355 | stepan | 326 | */ |
2358 | kebrt | 327 | size_t gxemul_get_memory_size(void) |
2274 | kebrt | 328 | { |
2464 | jermar | 329 | return *((int *) (GXEMUL_MP + GXEMUL_MP_MEMSIZE_OFFSET)); |
2263 | kebrt | 330 | } |
2245 | stepan | 331 | |
2412 | kebrt | 332 | /** Prints a character. |
333 | * |
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334 | * @param ch Character to be printed. |
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335 | */ |
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2358 | kebrt | 336 | void gxemul_debug_putc(char ch) |
2300 | kebrt | 337 | { |
2464 | jermar | 338 | char *addr = 0; |
2290 | kebrt | 339 | if (!hw_map_init_called) { |
2300 | kebrt | 340 | addr = (char *) GXEMUL_KBD; |
2290 | kebrt | 341 | } else { |
2300 | kebrt | 342 | addr = (char *) gxemul_hw_map.videoram; |
2290 | kebrt | 343 | } |
2300 | kebrt | 344 | |
345 | *(addr) = ch; |
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2264 | kebrt | 346 | } |
347 | |||
2355 | stepan | 348 | /** Stops gxemul. */ |
2358 | kebrt | 349 | void gxemul_cpu_halt(void) |
2300 | kebrt | 350 | { |
351 | char * addr = 0; |
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352 | if (!hw_map_init_called) { |
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353 | addr = (char *) GXEMUL_KBD; |
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354 | } else { |
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355 | addr = (char *) gxemul_hw_map.videoram; |
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356 | } |
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357 | |||
358 | *(addr + GXEMUL_HALT_OFFSET) = '\0'; |
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359 | } |
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360 | |||
2355 | stepan | 361 | /** Gxemul specific interrupt exception handler. |
362 | * |
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363 | * Determines sources of the interrupt from interrupt controller and |
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364 | * calls high-level handlers for them. |
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365 | * |
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2357 | kebrt | 366 | * @param exc_no Interrupt exception number. |
367 | * @param istate Saved processor state. |
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2355 | stepan | 368 | */ |
2358 | kebrt | 369 | void gxemul_irq_exception(int exc_no, istate_t *istate) |
2306 | kebrt | 370 | { |
371 | uint32_t sources = gxemul_irqc_get_sources(); |
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2464 | jermar | 372 | int i; |
373 | |||
374 | for (i = 0; i < GXEMUL_IRQC_MAX_IRQ; i++) { |
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2306 | kebrt | 375 | if (sources & (1 << i)) { |
376 | irq_t *irq = irq_dispatch_and_lock(i); |
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377 | if (irq) { |
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378 | /* The IRQ handler was found. */ |
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379 | irq->handler(irq, irq->arg); |
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380 | spinlock_unlock(&irq->lock); |
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381 | } else { |
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382 | /* Spurious interrupt.*/ |
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2464 | jermar | 383 | dprintf("cpu%d: spurious interrupt (inum=%d)\n", |
384 | CPU->id, i); |
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2306 | kebrt | 385 | } |
386 | } |
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387 | } |
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388 | } |
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389 | |||
2412 | kebrt | 390 | /** Returns address of framebuffer device. |
391 | * |
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392 | * @return Address of framebuffer device. |
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393 | */ |
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2358 | kebrt | 394 | uintptr_t gxemul_get_fb_address(void) |
2357 | kebrt | 395 | { |
2360 | kebrt | 396 | return (uintptr_t) GXEMUL_FB; |
2357 | kebrt | 397 | } |
398 | |||
2215 | kebrt | 399 | /** @} |
400 | */ |