| 0,0 → 1,139 |
|---|
| /* |
| * Copyright (c) 2001-2004 Jakub Jermar |
| * 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 ia32 |
| * @{ |
| */ |
| /** |
| * @file |
| * @brief EGA driver. |
| */ |
| |
| #include <putchar.h> |
| #include <mm/page.h> |
| #include <mm/as.h> |
| #include <arch/mm/page.h> |
| #include <synch/spinlock.h> |
| #include <arch/types.h> |
| #include <arch/asm.h> |
| #include <memstr.h> |
| #include <console/chardev.h> |
| #include <console/console.h> |
| #include <sysinfo/sysinfo.h> |
| #include <arch/drivers/ega.h> |
| |
| /* |
| * The EGA driver. |
| * Simple and short. Function for displaying characters and "scrolling". |
| */ |
| |
| SPINLOCK_INITIALIZE(egalock); |
| static uint32_t ega_cursor; |
| static uint8_t *videoram; |
| |
| static void ega_putchar(chardev_t *d, const char ch); |
| |
| chardev_t ega_console; |
| static chardev_operations_t ega_ops = { |
| .write = ega_putchar |
| }; |
| |
| |
| void ega_init(void) |
| { |
| videoram = (uint8_t *) (VIDEORAM); |
| |
| /* |
| * Clear the screen. |
| */ |
| _memsetw((uintptr_t) videoram, SCREEN, 0x0720); |
| |
| chardev_initialize("ega_out", &ega_console, &ega_ops); |
| stdout = &ega_console; |
| |
| sysinfo_set_item_val("fb", NULL, true); |
| sysinfo_set_item_val("fb.kind", NULL, 2); |
| sysinfo_set_item_val("fb.width", NULL, ROW); |
| sysinfo_set_item_val("fb.height", NULL, ROWS); |
| sysinfo_set_item_val("fb.address.physical", NULL, VIDEORAM); |
| |
| #ifndef CONFIG_FB |
| putchar('\n'); |
| #endif |
| } |
| |
| static void ega_display_char(char ch) |
| { |
| videoram[ega_cursor * 2] = ch; |
| videoram[ega_cursor * 2 + 1] = 7; |
| } |
| |
| /* |
| * This function takes care of scrolling. |
| */ |
| static void ega_check_cursor(void) |
| { |
| if (ega_cursor < SCREEN) |
| return; |
| |
| memcpy((void *) videoram, (void *) (videoram + ROW * 2), (SCREEN - ROW) * 2); |
| _memsetw((uintptr_t) (videoram + (SCREEN - ROW) * 2), ROW, 0x0720); |
| ega_cursor = ega_cursor - ROW; |
| } |
| |
| void ega_putchar(chardev_t *d, const char ch) |
| { |
| ipl_t ipl; |
| |
| ipl = interrupts_disable(); |
| spinlock_lock(&egalock); |
| |
| switch (ch) { |
| case '\n': |
| ega_cursor = (ega_cursor + ROW) - ega_cursor % ROW; |
| break; |
| case '\t': |
| ega_cursor = (ega_cursor + 8) - ega_cursor % 8; |
| break; |
| case '\b': |
| if (ega_cursor % ROW) |
| ega_cursor--; |
| break; |
| default: |
| ega_display_char(ch); |
| ega_cursor++; |
| break; |
| } |
| ega_check_cursor(); |
| |
| spinlock_unlock(&egalock); |
| interrupts_restore(ipl); |
| } |
| |
| /** @} |
| */ |