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575 | palkovsky | 1 | /* |
2 | * Copyright (C) 2005 Ondrej Palkovsky |
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3 | * All rights reserved. |
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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 | #include <interrupt.h> |
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30 | #include <console/chardev.h> |
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31 | #include <arch/drivers/msim.h> |
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32 | #include <arch/cp0.h> |
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33 | |||
34 | static chardev_t console; |
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35 | |||
36 | static void msim_write(chardev_t *dev, const char ch); |
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37 | static void msim_enable(chardev_t *dev); |
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38 | static void msim_disable(chardev_t *dev); |
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39 | |||
40 | static chardev_operations_t msim_ops = { |
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41 | .resume = msim_enable, |
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42 | .suspend = msim_disable, |
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43 | .write = msim_write |
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44 | }; |
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45 | |||
46 | /** Putchar that works with MSIM & gxemul */ |
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47 | void msim_write(chardev_t *dev, const char ch) |
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48 | { |
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49 | *((char *) MSIM_VIDEORAM) = ch; |
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50 | } |
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51 | |||
52 | /* Called from getc(). */ |
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53 | void msim_enable(chardev_t *dev) |
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54 | { |
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55 | cp0_unmask_int(MSIM_KBD_IRQ); |
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56 | } |
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57 | |||
58 | /* Called from getc(). */ |
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59 | void msim_disable(chardev_t *dev) |
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60 | { |
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61 | cp0_mask_int(MSIM_KBD_IRQ); |
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62 | } |
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63 | |||
64 | /** Process keyboard interrupt. */ |
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65 | static void msim_interrupt(int n, void *stack) |
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66 | { |
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67 | char ch; |
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68 | |||
69 | ch = *((char *) MSIM_KBD_ADDRESS); |
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70 | if (ch =='\r') |
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71 | ch = '\n'; |
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72 | chardev_push_character(&console, ch); |
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73 | } |
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74 | |||
75 | |||
76 | /* Return console object representing msim console */ |
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77 | chardev_t * msim_console(void) |
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78 | { |
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79 | chardev_initialize("msim_console", &console, &msim_ops); |
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80 | |||
81 | exc_register(MSIM_KBD_IRQ, "msim_kbd", msim_interrupt); |
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82 | |||
83 | cp0_unmask_int(MSIM_KBD_IRQ); |
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84 | |||
85 | return &console; |
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86 | } |