Index: kernel/genarch/Makefile.inc =================================================================== --- kernel/genarch/Makefile.inc (revision 24a44ec161e8b3293d6f2f9ef1360e003d87831e) +++ kernel/genarch/Makefile.inc (revision 6974061e1842871be86c704bfb29ffcf2e9f2776) @@ -104,2 +104,8 @@ genarch/src/ofw/upa.c endif + +## EGA +ifeq ($(CONFIG_EGA), y) + GENARCH_SOURCES += \ + genarch/src/drivers/ega/ega.c +endif Index: kernel/genarch/include/drivers/ega/ega.h =================================================================== --- kernel/genarch/include/drivers/ega/ega.h (revision 6974061e1842871be86c704bfb29ffcf2e9f2776) +++ kernel/genarch/include/drivers/ega/ega.h (revision 6974061e1842871be86c704bfb29ffcf2e9f2776) @@ -0,0 +1,54 @@ +/* + * 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 genarch_drivers + * @{ + */ +/** @file + */ + +#ifndef KERN_EGA_H_ +#define KERN_EGA_H_ + +#include + +#define ROW 80 +#define ROWS 25 +#define SCREEN (ROW * ROWS) + +/* EGA device registers. */ +#define EGA_INDEX_REG 0 +#define EGA_DATA_REG 1 + +extern void ega_redraw(void); +extern void ega_init(ioport_t, uintptr_t); + +#endif + +/** @} + */ Index: kernel/genarch/src/drivers/ega/ega.c =================================================================== --- kernel/genarch/src/drivers/ega/ega.c (revision 6974061e1842871be86c704bfb29ffcf2e9f2776) +++ kernel/genarch/src/drivers/ega/ega.c (revision 6974061e1842871be86c704bfb29ffcf2e9f2776) @@ -0,0 +1,175 @@ +/* + * 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 genarch_drivers + * @{ + */ +/** + * @file + * @brief EGA driver. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* + * The EGA driver. + * Simple and short. Function for displaying characters and "scrolling". + */ + +static parea_t ega_parea; /**< Physical memory area for EGA video RAM. */ + +SPINLOCK_INITIALIZE(egalock); +static uint32_t ega_cursor; +static uint8_t *videoram; +static uint8_t *backbuf; +static ioport_t ega_base; + +static void ega_putchar(chardev_t *d, const char ch); + +chardev_t ega_console; +static chardev_operations_t ega_ops = { + .write = ega_putchar +}; + +static void ega_move_cursor(void); + +void ega_init(ioport_t base, uintptr_t videoram_phys) +{ + /* Initialize the software structure. */ + ega_base = base; + + backbuf = (uint8_t *) malloc(SCREEN * 2, 0); + if (!backbuf) + panic("Unable to allocate backbuffer.\n"); + + videoram = (uint8_t *) hw_map(videoram_phys, SCREEN * 2); + + /* Clear the screen and set the cursor position. */ + memsetw(videoram, SCREEN, 0x0720); + memsetw(backbuf, SCREEN, 0x0720); + ega_move_cursor(); + + chardev_initialize("ega_out", &ega_console, &ega_ops); + stdout = &ega_console; + + ega_parea.pbase = videoram_phys; + ega_parea.vbase = (uintptr_t) videoram; + ega_parea.frames = 1; + ega_parea.cacheable = false; + ddi_parea_register(&ega_parea); + + 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.blinking", NULL, true); + sysinfo_set_item_val("fb.address.physical", NULL, videoram_phys); +} + +static void ega_display_char(char ch) +{ + videoram[ega_cursor * 2] = ch; + backbuf[ega_cursor * 2] = ch; +} + +/* + * This function takes care of scrolling. + */ +static void ega_check_cursor(void) +{ + if (ega_cursor < SCREEN) + return; + + memmove((void *) videoram, (void *) (videoram + ROW * 2), + (SCREEN - ROW) * 2); + memmove((void *) backbuf, (void *) (backbuf + ROW * 2), + (SCREEN - ROW) * 2); + memsetw(videoram + (SCREEN - ROW) * 2, ROW, 0x0720); + memsetw(backbuf + (SCREEN - ROW) * 2, ROW, 0x0720); + ega_cursor = ega_cursor - ROW; +} + +void ega_putchar(chardev_t *d __attribute__((unused)), 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(); + ega_move_cursor(); + + spinlock_unlock(&egalock); + interrupts_restore(ipl); +} + +void ega_move_cursor(void) +{ + outb(ega_base + EGA_INDEX_REG, 0xe); + outb(ega_base + EGA_DATA_REG, (uint8_t) ((ega_cursor >> 8) & 0xff)); + outb(ega_base + EGA_INDEX_REG, 0xf); + outb(ega_base + EGA_DATA_REG, (uint8_t) (ega_cursor & 0xff)); +} + +void ega_redraw(void) +{ + memcpy(videoram, backbuf, SCREEN * 2); + ega_move_cursor(); +} + +/** @} + */