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2007-11-03 Marco Gerards <marco@gnu.org>

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* term/i386/pc/vga_text.c: Include <grub/cpu/io.h>.
	(CRTC_ADDR_PORT): New macro.
	(CRTC_DATA_PORT): Likewise.
	(CRTC_CURSOR): Likewise.
	(CRTC_CURSOR_ADDR_HIGH): Likewise.
	(CRTC_CURSOR_ADDR_LOW): Likewise.
	(update_cursor): New function.
	(grub_console_real_putchar): Call `update_cursor'.
	(grub_console_gotoxy): Likewise.
	(grub_console_cls): Set the default color when clearing the
	screen.
	(grub_console_setcursor): Implemented.
This commit is contained in:
marco_g 2007-11-03 16:46:40 +00:00
parent bb06ab2eb2
commit be7ac41e14
2 changed files with 44 additions and 4 deletions
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15
ChangeLog
View file

@ -1,3 +1,18 @@
2007-11-03 Marco Gerards <marco@gnu.org>
* term/i386/pc/vga_text.c: Include <grub/cpu/io.h>.
(CRTC_ADDR_PORT): New macro.
(CRTC_DATA_PORT): Likewise.
(CRTC_CURSOR): Likewise.
(CRTC_CURSOR_ADDR_HIGH): Likewise.
(CRTC_CURSOR_ADDR_LOW): Likewise.
(update_cursor): New function.
(grub_console_real_putchar): Call `update_cursor'.
(grub_console_gotoxy): Likewise.
(grub_console_cls): Set the default color when clearing the
screen.
(grub_console_setcursor): Implemented.
2007-11-03 Marco Gerards <marco@gnu.org>
* disk/ata.c (grub_ata_pio_read): Don't wait for the command to

33
term/i386/pc/vga_text.c
View file

@ -17,6 +17,7 @@
*/
#include <grub/machine/console.h>
#include <grub/cpu/io.h>
#include <grub/types.h>
#define COLS 80
@ -26,6 +27,13 @@ static int grub_curr_x, grub_curr_y;
#define VGA_TEXT_SCREEN 0xb8000
#define CRTC_ADDR_PORT 0x3D4
#define CRTC_DATA_PORT 0x3D5
#define CRTC_CURSOR 0x0a
#define CRTC_CURSOR_ADDR_HIGH 0x0e
#define CRTC_CURSOR_ADDR_LOW 0x0f
static void
screen_write_char (int x, int y, short c)
{
@ -38,6 +46,16 @@ screen_read_char (int x, int y)
return ((short *) VGA_TEXT_SCREEN)[y * COLS + x];
}
static void
update_cursor (void)
{
unsigned int pos = grub_curr_y * COLS + grub_curr_x;
grub_outb (CRTC_CURSOR_ADDR_HIGH, CRTC_ADDR_PORT);
grub_outb (pos >> 8, CRTC_DATA_PORT);
grub_outb (CRTC_CURSOR_ADDR_LOW, CRTC_ADDR_PORT);
grub_outb (pos & 0xFF, CRTC_DATA_PORT);
}
static void
inc_y ()
{
@ -78,9 +96,12 @@ grub_console_real_putchar (int c)
grub_curr_x = 0;
break;
default:
screen_write_char (grub_curr_x, grub_curr_y, c | (grub_console_cur_color << 8));
screen_write_char (grub_curr_x,
grub_curr_y, c | (grub_console_cur_color << 8));
inc_x ();
}
update_cursor ();
}
grub_uint16_t
@ -94,6 +115,7 @@ grub_console_gotoxy (grub_uint8_t x, grub_uint8_t y)
{
grub_curr_x = x;
grub_curr_y = y;
update_cursor ();
}
void
@ -101,11 +123,14 @@ grub_console_cls ()
{
int i;
for (i = 0; i < ROWS * COLS; i++)
((short *) VGA_TEXT_SCREEN)[i] = ' ';
((short *) VGA_TEXT_SCREEN)[i] = ' ' | (grub_console_cur_color << 8);
}
void
grub_console_setcursor (int on __attribute__ ((unused)))
grub_console_setcursor (int on)
{
/* Not implemented. */
grub_uint8_t old;
grub_outb (CRTC_CURSOR, CRTC_ADDR_PORT);
old = grub_inb (CRTC_DATA_PORT);
grub_outb ((old & ~(on << 5)), CRTC_DATA_PORT);
}