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Rev | Author | Line No. | Line |
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2215 | kebrt | 1 | /* |
2245 | stepan | 2 | * Copyright (c) 2005-2007 Ondrej Palkovsky, 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 | |||
29 | /** @addtogroup arm32 |
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30 | * @{ |
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31 | */ |
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32 | /** @file |
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33 | */ |
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34 | |||
35 | #include <interrupt.h> |
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36 | #include <ipc/irq.h> |
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37 | #include <console/chardev.h> |
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38 | #include <arch/drivers/gxemul.h> |
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39 | #include <console/console.h> |
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40 | #include <sysinfo/sysinfo.h> |
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41 | #include <print.h> |
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2245 | stepan | 42 | #include <ddi/device.h> |
2215 | kebrt | 43 | |
44 | /** Address of devices. */ |
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45 | #define GXEMUL_VIDEORAM 0x10000000 |
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46 | #define GXEMUL_KBD_ADDRESS 0x10000000 |
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2245 | stepan | 47 | #define GXEMUL_RTC 0x15000000 |
48 | #define GXEMUL_RTC_FREQ 0x15000100 |
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49 | #define GXEMUL_RTC_ACK 0x15000110 |
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50 | #define GXEMUL_IRQC 0x16000000 |
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51 | #define GXEMUL_IRQC_MASK 0x16000004 |
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52 | #define GXEMUL_IRQC_UNMASK 0x16000008 |
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2215 | kebrt | 53 | |
2245 | stepan | 54 | /** IRQs */ |
55 | #define GXEMUL_KBD_IRQ 2 |
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56 | #define GXEMUL_TIMER_IRQ 4 |
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57 | |||
2215 | kebrt | 58 | static chardev_t console; |
59 | static irq_t gxemul_irq; |
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2245 | stepan | 60 | static irq_t gxemul_timer_irq; |
2215 | kebrt | 61 | |
62 | static void gxemul_write(chardev_t *dev, const char ch); |
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63 | static void gxemul_enable(chardev_t *dev); |
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64 | static void gxemul_disable(chardev_t *dev); |
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65 | static char gxemul_do_read(chardev_t *dev); |
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66 | |||
67 | static chardev_operations_t gxemul_ops = { |
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68 | .resume = gxemul_enable, |
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69 | .suspend = gxemul_disable, |
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70 | .write = gxemul_write, |
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71 | .read = gxemul_do_read, |
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72 | }; |
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73 | |||
74 | /** Putchar that works with gxemul */ |
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75 | void gxemul_write(chardev_t *dev, const char ch) |
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76 | { |
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77 | *((char *) GXEMUL_VIDEORAM) = ch; |
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78 | } |
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79 | |||
80 | /* Called from getc(). */ |
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81 | void gxemul_enable(chardev_t *dev) |
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82 | { |
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83 | // cp0_unmask_int(GXEMUL_KBD_IRQ); |
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2245 | stepan | 84 | gxemul_irqc_unmask(GXEMUL_KBD_IRQ); |
2215 | kebrt | 85 | } |
86 | |||
87 | /* Called from getc(). */ |
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88 | void gxemul_disable(chardev_t *dev) |
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89 | { |
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90 | // cp0_mask_int(GXEMUL_KBD_IRQ); |
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2245 | stepan | 91 | gxemul_irqc_mask(GXEMUL_KBD_IRQ); |
2215 | kebrt | 92 | } |
93 | |||
94 | /** Read character using polling, assume interrupts disabled */ |
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95 | static char gxemul_do_read(chardev_t *dev) |
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96 | { |
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97 | char ch; |
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98 | |||
99 | while (1) { |
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100 | ch = *((volatile char *) GXEMUL_KBD_ADDRESS); |
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101 | if (ch) { |
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102 | if (ch == '\r') |
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103 | return '\n'; |
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104 | if (ch == 0x7f) |
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105 | return '\b'; |
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106 | return ch; |
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107 | } |
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108 | } |
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109 | } |
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110 | |||
111 | /** Process keyboard interrupt. */ |
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112 | static void gxemul_irq_handler(irq_t *irq, void *arg, ...) |
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113 | { |
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114 | if ((irq->notif_cfg.notify) && (irq->notif_cfg.answerbox)) |
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115 | ipc_irq_send_notif(irq); |
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116 | else { |
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117 | char ch = 0; |
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118 | |||
119 | ch = *((char *) GXEMUL_KBD_ADDRESS); |
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120 | if (ch =='\r') |
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121 | ch = '\n'; |
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122 | if (ch == 0x7f) |
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123 | ch = '\b'; |
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2245 | stepan | 124 | //chardev_push_character(&console, ch); |
125 | printf("%c", ch); |
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2215 | kebrt | 126 | } |
127 | } |
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128 | |||
129 | static irq_ownership_t gxemul_claim(void) |
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130 | { |
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131 | return IRQ_ACCEPT; |
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132 | } |
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133 | |||
134 | void gxemul_kbd_grab(void) |
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135 | { |
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136 | ipl_t ipl = interrupts_disable(); |
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137 | spinlock_lock(&msim_irq.lock); |
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138 | gxemul_irq.notif_cfg.notify = false; |
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139 | spinlock_unlock(&gxemul_irq.lock); |
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140 | interrupts_restore(ipl); |
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141 | } |
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142 | |||
143 | void gxemul_kbd_release(void) |
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144 | { |
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145 | ipl_t ipl = interrupts_disable(); |
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146 | spinlock_lock(&gxemul_irq.lock); |
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147 | if (gxemul_irq.notif_cfg.answerbox) |
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148 | gxemul_irq.notif_cfg.notify = true; |
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149 | spinlock_unlock(&gxemul_irq.lock); |
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150 | interrupts_restore(ipl); |
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151 | } |
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152 | |||
153 | |||
2245 | stepan | 154 | /** Return console object representing msim console */ |
2215 | kebrt | 155 | void gxemul_console(devno_t devno) |
156 | { |
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157 | chardev_initialize("msim_console", &console, &gxemul_ops); |
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158 | stdin = &console; |
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159 | stdout = &console; |
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160 | |||
161 | irq_initialize(&gxemul_irq); |
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162 | gxemul_irq.devno = devno; |
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163 | gxemul_irq.inr = GXEMUL_KBD_IRQ; |
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164 | gxemul_irq.claim = gxemul_claim; |
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165 | gxemul_irq.handler = gxemul_irq_handler; |
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166 | irq_register(&gxemul_irq); |
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167 | |||
168 | // cp0_unmask_int(GXEMUL_KBD_IRQ); |
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2245 | stepan | 169 | gxemul_irqc_unmask(GXEMUL_KBD_IRQ); |
2215 | kebrt | 170 | |
171 | sysinfo_set_item_val("kbd", NULL, true); |
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172 | sysinfo_set_item_val("kbd.devno", NULL, devno); |
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173 | sysinfo_set_item_val("kbd.inr", NULL, GXEMUL_KBD_IRQ); |
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174 | sysinfo_set_item_val("kbd.address.virtual", NULL, GXEMUL_KBD_ADDRESS); |
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175 | } |
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176 | |||
2245 | stepan | 177 | /** Return the mask of active interrupts. */ |
178 | inline uint32_t gxemul_irqc_get_sources(void) |
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179 | { |
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180 | return *(uint32_t*) GXEMUL_IRQC; |
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181 | } |
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182 | |||
183 | /** Masks interrupt. |
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184 | * |
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185 | * @param irq interrupt number |
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186 | */ |
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187 | inline void gxemul_irqc_mask(uint32_t irq) |
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188 | { |
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189 | *(uint32_t*) GXEMUL_IRQC_MASK = irq; |
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190 | } |
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191 | |||
192 | /** Unmasks interrupt. |
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193 | * |
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194 | * @param irq interrupt number |
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195 | */ |
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196 | inline void gxemul_irqc_unmask(uint32_t irq) |
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197 | { |
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198 | *(uint32_t*) GXEMUL_IRQC_UNMASK = irq; |
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199 | } |
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200 | |||
201 | |||
202 | /** Starts gxemul Real Time Clock device, which asserts regular interrupts. |
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203 | * |
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204 | * @param frequency interrupts frequency (0 disables RTC) |
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205 | */ |
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206 | void gxemul_timer_start(uint32_t frequency) |
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207 | { |
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208 | *(uint32_t*) GXEMUL_RTC_FREQ = frequency; |
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209 | } |
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210 | |||
211 | static irq_ownership_t gxemul_timer_claim(void) |
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212 | { |
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213 | return IRQ_ACCEPT; |
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214 | } |
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215 | |||
216 | static void gxemul_timer_irq_handler(irq_t *irq, void *arg, ...) |
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217 | { |
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218 | /* TODO time drifts ?? |
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219 | unsigned long drift; |
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220 | |||
221 | drift = cp0_count_read() - nextcount; |
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222 | while (drift > cp0_compare_value) { |
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223 | drift -= cp0_compare_value; |
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224 | CPU->missed_clock_ticks++; |
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225 | } |
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226 | nextcount = cp0_count_read() + cp0_compare_value - drift; |
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227 | cp0_compare_write(nextcount); |
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228 | */ |
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229 | |||
230 | /* |
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231 | * We are holding a lock which prevents preemption. |
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232 | * Release the lock, call clock() and reacquire the lock again. |
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233 | */ |
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234 | spinlock_unlock(&irq->lock); |
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235 | //clock(); |
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236 | puts(" "); |
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237 | spinlock_lock(&irq->lock); |
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2261 | stepan | 238 | |
239 | /* acknowledge tick */ |
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240 | *(uint32_t*) GXEMUL_RTC_ACK = 0; |
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2245 | stepan | 241 | |
242 | /* TODO what's that? * |
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243 | if (virtual_timer_fnc != NULL) |
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244 | virtual_timer_fnc(); |
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245 | */ |
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246 | } |
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247 | |||
248 | /** |
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249 | * Initializes and registers timer interrupt handler. |
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250 | */ |
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251 | void gxemul_timer_irq_init() |
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252 | { |
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253 | irq_initialize(&gxemul_timer_irq); |
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254 | gxemul_timer_irq.devno = device_assign_devno(); |
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255 | gxemul_timer_irq.inr = GXEMUL_TIMER_IRQ; |
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256 | gxemul_timer_irq.claim = gxemul_timer_claim; |
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257 | gxemul_timer_irq.handler = gxemul_timer_irq_handler; |
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2261 | stepan | 258 | |
2245 | stepan | 259 | irq_register(&gxemul_timer_irq); |
260 | } |
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261 | |||
262 | |||
2215 | kebrt | 263 | /** @} |
264 | */ |