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| Rev | Author | Line No. | Line |
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| 78 | jermar | 1 | /* |
| 2 | * Copyright (C) 2005 Jakub Jermar |
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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 <arch/ski/ski.h> |
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| 577 | palkovsky | 30 | #include <console/console.h> |
| 31 | #include <console/chardev.h> |
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| 78 | jermar | 32 | |
| 577 | palkovsky | 33 | static chardev_t ski_console; |
| 34 | static bool kb_disable; |
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| 78 | jermar | 35 | |
| 586 | jermar | 36 | static void ski_putchar(chardev_t *d, const char ch); |
| 583 | jermar | 37 | static __s32 ski_getchar(void); |
| 38 | |||
| 79 | jermar | 39 | /** Display character on debug console |
| 40 | * |
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| 41 | * Use SSC (Simulator System Call) to |
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| 42 | * display character on debug console. |
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| 43 | * |
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| 583 | jermar | 44 | * @param d Character device. |
| 45 | * @param ch Character to be printed. |
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| 79 | jermar | 46 | */ |
| 586 | jermar | 47 | void ski_putchar(chardev_t *d, const char ch) |
| 78 | jermar | 48 | { |
| 892 | vana | 49 | __asm__ volatile ( |
| 78 | jermar | 50 | "mov r15=%0\n" |
| 51 | "mov r32=%1\n" /* r32 is in0 */ |
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| 52 | "break 0x80000\n" /* modifies r8 */ |
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| 53 | : |
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| 54 | : "i" (SKI_PUTCHAR), "r" (ch) |
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| 55 | : "r15", "in0", "r8" |
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| 56 | ); |
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| 57 | |||
| 583 | jermar | 58 | if (ch == '\n') |
| 586 | jermar | 59 | ski_putchar(d, '\r'); |
| 78 | jermar | 60 | } |
| 519 | vana | 61 | |
| 523 | jermar | 62 | /** Ask debug console if a key was pressed. |
| 519 | vana | 63 | * |
| 64 | * Use SSC (Simulator System Call) to |
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| 65 | * get character from debug console. |
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| 523 | jermar | 66 | * |
| 67 | * This call is non-blocking. |
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| 68 | * |
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| 69 | * @return ASCII code of pressed key or 0 if no key pressed. |
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| 519 | vana | 70 | */ |
| 71 | __s32 ski_getchar(void) |
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| 72 | { |
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| 73 | __u64 ch; |
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| 74 | |||
| 892 | vana | 75 | __asm__ volatile ( |
| 584 | jermar | 76 | "mov r15=%1\n" |
| 519 | vana | 77 | "break 0x80000;;\n" /* modifies r8 */ |
| 584 | jermar | 78 | "mov %0=r8;;\n" |
| 519 | vana | 79 | |
| 584 | jermar | 80 | : "=r" (ch) |
| 81 | : "i" (SKI_GETCHAR) |
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| 519 | vana | 82 | : "r15", "r8" |
| 83 | ); |
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| 84 | |||
| 584 | jermar | 85 | return (__s32) ch; |
| 519 | vana | 86 | } |
| 577 | palkovsky | 87 | |
| 892 | vana | 88 | /** |
| 893 | jermar | 89 | * This is a blocking wrapper for ski_getchar(). |
| 90 | * To be used when the kernel crashes. |
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| 91 | */ |
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| 892 | vana | 92 | static char ski_getchar_blocking(chardev_t *d) |
| 93 | { |
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| 893 | jermar | 94 | int ch; |
| 95 | |||
| 96 | while(!(ch=ski_getchar())) |
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| 97 | ; |
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| 98 | if(ch == '\r') |
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| 99 | ch = '\n'; |
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| 892 | vana | 100 | return (char) ch; |
| 101 | } |
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| 102 | |||
| 577 | palkovsky | 103 | /** Ask keyboard if a key was pressed. */ |
| 104 | void poll_keyboard(void) |
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| 105 | { |
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| 106 | char ch; |
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| 107 | |||
| 108 | if (kb_disable) |
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| 109 | return; |
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| 110 | |||
| 111 | ch = ski_getchar(); |
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| 112 | if(ch == '\r') |
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| 113 | ch = '\n'; |
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| 114 | if (ch) |
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| 115 | chardev_push_character(&ski_console, ch); |
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| 116 | } |
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| 117 | |||
| 118 | /* Called from getc(). */ |
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| 583 | jermar | 119 | static void ski_kb_enable(chardev_t *d) |
| 577 | palkovsky | 120 | { |
| 121 | kb_disable = false; |
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| 122 | } |
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| 123 | |||
| 124 | /* Called from getc(). */ |
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| 125 | static void ski_kb_disable(chardev_t *d) |
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| 126 | { |
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| 127 | kb_disable = true; |
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| 128 | } |
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| 129 | |||
| 130 | |||
| 131 | static chardev_operations_t ski_ops = { |
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| 132 | .resume = ski_kb_enable, |
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| 133 | .suspend = ski_kb_disable, |
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| 892 | vana | 134 | .write = ski_putchar, |
| 135 | .read = ski_getchar_blocking |
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| 577 | palkovsky | 136 | }; |
| 137 | |||
| 138 | |||
| 139 | /** Initialize debug console |
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| 140 | * |
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| 141 | * Issue SSC (Simulator System Call) to |
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| 142 | * to open debug console. |
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| 143 | */ |
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| 144 | void ski_init_console(void) |
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| 145 | { |
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| 892 | vana | 146 | __asm__ volatile ( |
| 577 | palkovsky | 147 | "mov r15=%0\n" |
| 148 | "break 0x80000\n" |
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| 149 | : |
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| 150 | : "i" (SKI_INIT_CONSOLE) |
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| 151 | : "r15", "r8" |
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| 152 | ); |
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| 153 | |||
| 154 | chardev_initialize("ski_console", &ski_console, &ski_ops); |
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| 155 | stdin = &ski_console; |
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| 156 | stdout = &ski_console; |
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| 157 | } |