| 0,0 → 1,131 |
|---|
| /* |
| * Copyright (C) 2005 Ondrej Palkovsky |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup mips32 |
| * @{ |
| */ |
| /** @file |
| */ |
| |
| #include <interrupt.h> |
| #include <console/chardev.h> |
| #include <arch/drivers/msim.h> |
| #include <arch/cp0.h> |
| #include <console/console.h> |
| |
| static chardev_t console; |
| |
| static void msim_write(chardev_t *dev, const char ch); |
| static void msim_enable(chardev_t *dev); |
| static void msim_disable(chardev_t *dev); |
| static char msim_do_read(chardev_t *dev); |
| |
| static chardev_operations_t msim_ops = { |
| .resume = msim_enable, |
| .suspend = msim_disable, |
| .write = msim_write, |
| .read = msim_do_read, |
| }; |
| |
| /** Putchar that works with MSIM & gxemul */ |
| void msim_write(chardev_t *dev, const char ch) |
| { |
| *((char *) MSIM_VIDEORAM) = ch; |
| } |
| |
| /* Called from getc(). */ |
| void msim_enable(chardev_t *dev) |
| { |
| cp0_unmask_int(MSIM_KBD_IRQ); |
| } |
| |
| /* Called from getc(). */ |
| void msim_disable(chardev_t *dev) |
| { |
| cp0_mask_int(MSIM_KBD_IRQ); |
| } |
| |
| #include <print.h> |
| /** Read character using polling, assume interrupts disabled */ |
| static char msim_do_read(chardev_t *dev) |
| { |
| char ch; |
| |
| while (1) { |
| ch = *((volatile char *) MSIM_KBD_ADDRESS); |
| if (ch) { |
| if (ch == '\r') |
| return '\n'; |
| if (ch == 0x7f) |
| return '\b'; |
| return ch; |
| } |
| } |
| } |
| |
| /** Process keyboard interrupt. */ |
| static void msim_interrupt(int n, istate_t *istate) |
| { |
| char ch = 0; |
| |
| ch = *((char *) MSIM_KBD_ADDRESS); |
| if (ch =='\r') |
| ch = '\n'; |
| if (ch == 0x7f) |
| ch = '\b'; |
| chardev_push_character(&console, ch); |
| } |
| |
| |
| /* Return console object representing msim console */ |
| void msim_console(void) |
| { |
| chardev_initialize("msim_console", &console, &msim_ops); |
| |
| int_register(MSIM_KBD_IRQ, "msim_kbd", msim_interrupt); |
| |
| cp0_unmask_int(MSIM_KBD_IRQ); |
| |
| stdin = &console; |
| stdout = &console; |
| } |
| |
| static iroutine oldvector; |
| void msim_kbd_grab(void) |
| { |
| oldvector = int_register(MSIM_KBD_IRQ, "msim_kbd", msim_interrupt); |
| } |
| void msim_kbd_release(void) |
| { |
| if (oldvector) |
| int_register(MSIM_KBD_IRQ, "user_interrupt", oldvector); |
| } |
| |
| /** @} |
| */ |
| |