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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 575 | palkovsky | 1 | /* |
| 2071 | jermar | 2 | * Copyright (c) 2005 Ondrej Palkovsky |
| 575 | palkovsky | 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 | |||
| 1888 | jermar | 29 | /** @addtogroup mips32 |
| 1702 | cejka | 30 | * @{ |
| 31 | */ |
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| 32 | /** @file |
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| 33 | */ |
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| 34 | |||
| 575 | palkovsky | 35 | #include <interrupt.h> |
| 2089 | decky | 36 | #include <ipc/irq.h> |
| 575 | palkovsky | 37 | #include <console/chardev.h> |
| 38 | #include <arch/drivers/msim.h> |
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| 39 | #include <arch/cp0.h> |
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| 606 | palkovsky | 40 | #include <console/console.h> |
| 1936 | decky | 41 | #include <sysinfo/sysinfo.h> |
| 2456 | hudecek | 42 | #include <synch/rcu.h> |
| 575 | palkovsky | 43 | |
| 1936 | decky | 44 | /** Address of devices. */ |
| 45 | #define MSIM_VIDEORAM 0xB0000000 |
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| 46 | #define MSIM_KBD_ADDRESS 0xB0000000 |
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| 47 | #define MSIM_KBD_IRQ 2 |
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| 48 | |||
| 575 | palkovsky | 49 | static chardev_t console; |
| 1936 | decky | 50 | static irq_t msim_irq; |
| 575 | palkovsky | 51 | |
| 52 | static void msim_write(chardev_t *dev, const char ch); |
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| 53 | static void msim_enable(chardev_t *dev); |
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| 54 | static void msim_disable(chardev_t *dev); |
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| 607 | palkovsky | 55 | static char msim_do_read(chardev_t *dev); |
| 575 | palkovsky | 56 | |
| 57 | static chardev_operations_t msim_ops = { |
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| 58 | .resume = msim_enable, |
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| 59 | .suspend = msim_disable, |
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| 607 | palkovsky | 60 | .write = msim_write, |
| 61 | .read = msim_do_read, |
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| 575 | palkovsky | 62 | }; |
| 63 | |||
| 64 | /** Putchar that works with MSIM & gxemul */ |
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| 65 | void msim_write(chardev_t *dev, const char ch) |
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| 66 | { |
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| 67 | *((char *) MSIM_VIDEORAM) = ch; |
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| 68 | } |
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| 69 | |||
| 70 | /* Called from getc(). */ |
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| 71 | void msim_enable(chardev_t *dev) |
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| 72 | { |
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| 73 | cp0_unmask_int(MSIM_KBD_IRQ); |
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| 74 | } |
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| 75 | |||
| 76 | /* Called from getc(). */ |
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| 77 | void msim_disable(chardev_t *dev) |
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| 78 | { |
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| 79 | cp0_mask_int(MSIM_KBD_IRQ); |
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| 80 | } |
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| 81 | |||
| 588 | palkovsky | 82 | #include <print.h> |
| 607 | palkovsky | 83 | /** Read character using polling, assume interrupts disabled */ |
| 84 | static char msim_do_read(chardev_t *dev) |
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| 85 | { |
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| 86 | char ch; |
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| 87 | |||
| 88 | while (1) { |
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| 89 | ch = *((volatile char *) MSIM_KBD_ADDRESS); |
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| 90 | if (ch) { |
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| 91 | if (ch == '\r') |
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| 92 | return '\n'; |
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| 93 | if (ch == 0x7f) |
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| 94 | return '\b'; |
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| 95 | return ch; |
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| 96 | } |
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| 97 | } |
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| 98 | } |
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| 99 | |||
| 575 | palkovsky | 100 | /** Process keyboard interrupt. */ |
| 1936 | decky | 101 | static void msim_irq_handler(irq_t *irq, void *arg, ...) |
| 575 | palkovsky | 102 | { |
| 2456 | hudecek | 103 | if ((rcu_dereference_pointer(irq->notif_cfg).notify) && (rcu_dereference_pointer(irq->notif_cfg).answerbox)) |
| 1936 | decky | 104 | ipc_irq_send_notif(irq); |
| 105 | else { |
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| 106 | char ch = 0; |
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| 107 | |||
| 108 | ch = *((char *) MSIM_KBD_ADDRESS); |
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| 109 | if (ch =='\r') |
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| 110 | ch = '\n'; |
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| 111 | if (ch == 0x7f) |
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| 112 | ch = '\b'; |
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| 113 | chardev_push_character(&console, ch); |
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| 114 | } |
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| 575 | palkovsky | 115 | } |
| 116 | |||
| 1936 | decky | 117 | static irq_ownership_t msim_claim(void) |
| 575 | palkovsky | 118 | { |
| 1936 | decky | 119 | return IRQ_ACCEPT; |
| 575 | palkovsky | 120 | } |
| 1474 | palkovsky | 121 | |
| 122 | void msim_kbd_grab(void) |
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| 123 | { |
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| 1944 | jermar | 124 | ipl_t ipl = interrupts_disable(); |
| 2456 | hudecek | 125 | //rcu_read_lock() is not needed, ints are disabled |
| 126 | //rcu: atomic update doesn't need reallocation |
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| 127 | rcu_dereference_pointer(msim_irq.notif_cfg).notify = false; |
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| 1944 | jermar | 128 | interrupts_restore(ipl); |
| 1474 | palkovsky | 129 | } |
| 1936 | decky | 130 | |
| 1474 | palkovsky | 131 | void msim_kbd_release(void) |
| 132 | { |
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| 1944 | jermar | 133 | ipl_t ipl = interrupts_disable(); |
| 2456 | hudecek | 134 | //rcu: atomic update doesn't need reallocation |
| 1944 | jermar | 135 | spinlock_lock(&msim_irq.lock); |
| 2456 | hudecek | 136 | if (rcu_dereference_pointer(msim_irq.notif_cfg).answerbox) |
| 137 | rcu_dereference_pointer(msim_irq.notif_cfg).notify = true; |
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| 1944 | jermar | 138 | spinlock_unlock(&msim_irq.lock); |
| 139 | interrupts_restore(ipl); |
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| 1474 | palkovsky | 140 | } |
| 1702 | cejka | 141 | |
| 1936 | decky | 142 | |
| 143 | /* Return console object representing msim console */ |
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| 144 | void msim_console(devno_t devno) |
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| 145 | { |
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| 146 | chardev_initialize("msim_console", &console, &msim_ops); |
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| 147 | stdin = &console; |
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| 148 | stdout = &console; |
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| 149 | |||
| 150 | irq_initialize(&msim_irq); |
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| 151 | msim_irq.devno = devno; |
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| 152 | msim_irq.inr = MSIM_KBD_IRQ; |
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| 153 | msim_irq.claim = msim_claim; |
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| 154 | msim_irq.handler = msim_irq_handler; |
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| 155 | irq_register(&msim_irq); |
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| 156 | |||
| 157 | cp0_unmask_int(MSIM_KBD_IRQ); |
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| 158 | |||
| 159 | sysinfo_set_item_val("kbd", NULL, true); |
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| 160 | sysinfo_set_item_val("kbd.devno", NULL, devno); |
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| 161 | sysinfo_set_item_val("kbd.inr", NULL, MSIM_KBD_IRQ); |
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| 162 | sysinfo_set_item_val("kbd.address.virtual", NULL, MSIM_KBD_ADDRESS); |
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| 163 | } |
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| 164 | |||
| 1888 | jermar | 165 | /** @} |
| 1702 | cejka | 166 | */ |