| 1 | /*
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| 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 |
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| 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 |
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| 34 | static chardev_t console;
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| 35 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 64 | #include <print.h>
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| 65 | /** Process keyboard interrupt. */
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| 66 | static void msim_interrupt(int n, void *stack)
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| 67 | {
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| 68 | char ch;
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| 69 |
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| 70 | ch = *((char *) MSIM_KBD_ADDRESS);
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| 71 | if (ch =='\r')
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| 72 | ch = '\n';
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| 73 | if (ch == 0x7f)
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| 74 | ch = '\b';
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| 75 | chardev_push_character(&console, ch);
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| 76 | }
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| 77 |
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| 78 |
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| 79 | /* Return console object representing msim console */
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| 80 | chardev_t * msim_console(void)
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| 81 | {
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| 82 | chardev_initialize("msim_console", &console, &msim_ops);
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| 83 |
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| 84 | int_register(MSIM_KBD_IRQ, "msim_kbd", msim_interrupt);
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| 85 |
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| 86 | cp0_unmask_int(MSIM_KBD_IRQ);
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| 87 |
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| 88 | return &console;
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| 89 | }
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