30939bdffd
Add a framework for multiple video console drivers. This is to prepare for the Geode driver. Signed-off-by: Jordan Crouse <jordan.crouse@amd.com> Acked-by: Uwe Hermann <uwe@hermann-uwe.de> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3230 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
141 lines
3.5 KiB
C
141 lines
3.5 KiB
C
/*
|
|
* This file is part of the libpayload project.
|
|
*
|
|
* Copyright (C) 2008 Advanced Micro Devices, Inc.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. 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.
|
|
* 3. 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
|
|
*/
|
|
|
|
#include <libpayload.h>
|
|
#include <video_console.h>
|
|
|
|
#define VGA_COLOR_WHITE 7
|
|
|
|
#define CRTC_INDEX 0x3d4
|
|
#define CRTC_DATA 0x3d5
|
|
|
|
#define VIDEO(_r, _c)\
|
|
((u16 *) (0xB8000 + ((_r) * (VIDEO_COLS * 2)) + ((_c) * 2)))
|
|
|
|
static u8 crtc_read(u8 index)
|
|
{
|
|
outb(index, CRTC_INDEX);
|
|
return inb(CRTC_DATA);
|
|
}
|
|
|
|
static void crtc_write(u8 data, u8 index)
|
|
{
|
|
outb(index, CRTC_INDEX);
|
|
outb(data, CRTC_DATA);
|
|
}
|
|
|
|
static void vga_get_cursor(unsigned int *x, unsigned int *y, unsigned int *en)
|
|
{
|
|
unsigned int addr;
|
|
addr = ((unsigned int) crtc_read(0x0E)) << 8;
|
|
addr += crtc_read(0x0E);
|
|
|
|
*x = addr % VIDEO_COLS;
|
|
*y = addr / VIDEO_COLS;
|
|
|
|
*en = !(crtc_read(0x0A) & (1 << 5));
|
|
}
|
|
|
|
static void vga_set_cursor(unsigned int x, unsigned int y)
|
|
{
|
|
unsigned int addr;
|
|
|
|
addr = x + (VIDEO_COLS * y);
|
|
crtc_write(addr >> 8, 0x0E);
|
|
crtc_write(addr, 0x0E);
|
|
}
|
|
|
|
static void vga_enable_cursor(int state)
|
|
{
|
|
unsigned char tmp = crtc_read(0x0a);
|
|
|
|
if (state == 0)
|
|
tmp |= (1 << 5);
|
|
|
|
else
|
|
tmp &= ~(1 << 5);
|
|
|
|
crtc_write(tmp, 0x0a);
|
|
}
|
|
|
|
static void vga_clear_line(u8 row, u8 ch, u8 attr)
|
|
{
|
|
int col;
|
|
u16 *ptr = VIDEO(0, row);
|
|
|
|
for(col = 0; col < VIDEO_COLS; col++)
|
|
ptr[col] = ((attr & 0xFF) << 8) | (ch & 0xFF);
|
|
}
|
|
|
|
static void vga_scroll_up(void)
|
|
{
|
|
u16 *src = VIDEO(0,1);
|
|
u16 *dst = VIDEO(0,0);
|
|
int i;
|
|
|
|
for(i = 0; i < (VIDEO_ROWS - 1) * VIDEO_COLS; i++)
|
|
*dst++ = *src++;
|
|
|
|
vga_clear_line(VIDEO_ROWS - 1, ' ', VGA_COLOR_WHITE);
|
|
}
|
|
|
|
static void vga_fill(u8 ch, u8 attr)
|
|
{
|
|
u8 row;
|
|
for(row = 0; row < VIDEO_ROWS; row++)
|
|
vga_clear_line(row, ch, attr);
|
|
}
|
|
|
|
static void vga_clear(void)
|
|
{
|
|
vga_fill(' ', VGA_COLOR_WHITE);
|
|
}
|
|
|
|
static void vga_putc(u8 row, u8 col, unsigned int c)
|
|
{
|
|
u16 *ptr = VIDEO(row, col);
|
|
*ptr = (u16) (c & 0xFFFF);
|
|
}
|
|
|
|
static int vga_init(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
struct video_console vga_video_console = {
|
|
.init = vga_init,
|
|
.putc = vga_putc,
|
|
.clear = vga_clear,
|
|
.scroll_up = vga_scroll_up,
|
|
|
|
.get_cursor = vga_get_cursor,
|
|
.set_cursor = vga_set_cursor,
|
|
.enable_cursor = vga_enable_cursor,
|
|
};
|