coreboot-kgpe-d16/payloads/libpayload/drivers/video/corebootfb.c

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/*
* This file is part of the libpayload project.
*
* Copyright (C) 2008 Advanced Micro Devices, Inc.
* Copyright (C) 2010 coresystems GmbH
*
* 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 <coreboot_tables.h>
#include <pci.h>
#include <video_console.h>
#include "font8x16.h"
struct video_console coreboot_video_console;
static unsigned int cursor_x = 0, cursor_y = 0, cursor_en = 0;
/* color definitions for the 16 standard colors */
#define VGA_COLOR_DEFAULT 7
static const u32 vga_colors[] = {
// BLUE | GREEN | RED
(0x00 << 16) | (0x00 << 8) | 0x00,
(0xAA << 16) | (0x00 << 8) | 0x00,
(0x00 << 16) | (0xAA << 8) | 0x00,
(0xAA << 16) | (0x55 << 8) | 0x00,
(0x00 << 16) | (0x00 << 8) | 0xAA,
(0xAA << 16) | (0x00 << 8) | 0xAA,
(0x00 << 16) | (0xAA << 8) | 0xAA,
(0xAA << 16) | (0xAA << 8) | 0xAA,
(0x55 << 16) | (0x55 << 8) | 0x55,
(0xFF << 16) | (0x55 << 8) | 0x55,
(0x55 << 16) | (0xFF << 8) | 0x55,
(0xFF << 16) | (0xFF << 8) | 0x55,
(0x55 << 16) | (0x55 << 8) | 0xFF,
(0xFF << 16) | (0x55 << 8) | 0xFF,
(0x55 << 16) | (0xFF << 8) | 0xFF,
(0xFF << 16) | (0xFF << 8) | 0xFF,
};
/* Addresses for the various components */
static unsigned long fbinfo;
static unsigned long fbaddr;
static unsigned long chars;
#define FI ((struct cb_framebuffer *) phys_to_virt(fbinfo))
#define FB ((unsigned char *) phys_to_virt(fbaddr))
#define CHARS ((unsigned short *) phys_to_virt(chars))
static void corebootfb_scroll_up(void)
{
unsigned char *dst = FB;
unsigned char *src = FB + (FI->bytes_per_line * FONT_HEIGHT);
int y;
/* Scroll all lines up */
for(y = 0; y < FI->y_resolution - FONT_HEIGHT; y++) {
memcpy(dst, src, FI->x_resolution * (FI->bits_per_pixel >> 3));
dst += FI->bytes_per_line;
src += FI->bytes_per_line;
}
/* Erase last line */
dst = FB + (FI->y_resolution - FONT_HEIGHT) * FI->bytes_per_line;
for(; y < FI->y_resolution; y++) {
memset(dst, 0, FI->x_resolution * (FI->bits_per_pixel >> 3));
dst += FI->bytes_per_line;
}
/* And update the char buffer */
dst = (unsigned char *) CHARS;
src = (unsigned char *) (CHARS + coreboot_video_console.columns);
memcpy(dst, src, coreboot_video_console.columns *
(coreboot_video_console.rows - 1) * 2);
int column;
for (column = 0; column < coreboot_video_console.columns; column++)
CHARS[(coreboot_video_console.rows - 1) * coreboot_video_console.columns + column] = (VGA_COLOR_DEFAULT << 8);
cursor_y--;
}
static void corebootfb_clear(void)
{
int row, column;
unsigned char *ptr = FB;
/* Clear the screen */
for(row = 0; row < FI->y_resolution; row++) {
memset(ptr, 0, FI->x_resolution * (FI->bits_per_pixel >> 3));
ptr += FI->bytes_per_line;
}
/* And update the char buffer */
for(row = 0; row < coreboot_video_console.rows; row++)
for (column = 0; column < coreboot_video_console.columns; column++)
CHARS[row * coreboot_video_console.columns + column] = (VGA_COLOR_DEFAULT << 8);
}
static void corebootfb_putchar(u8 row, u8 col, unsigned int ch)
{
unsigned char *dst;
unsigned char *glyph = font8x16 + ((ch & 0xFF) * FONT_HEIGHT);
unsigned char bg = (ch >> 12) & 0xF;
unsigned char fg = (ch >> 8) & 0xF;
u32 fgval = 0, bgval = 0;
u16 *dst16;
u32 *dst32;
int x, y;
if (FI->bits_per_pixel > 8) {
bgval = ((((vga_colors[bg] >> 0) & 0xff) >> (8 - FI->blue_mask_size)) << FI->blue_mask_pos) |
((((vga_colors[bg] >> 8) & 0xff) >> (8 - FI->green_mask_size)) << FI->green_mask_pos) |
((((vga_colors[bg] >> 16) & 0xff) >> (8 - FI->red_mask_size)) << FI->red_mask_pos);
fgval = ((((vga_colors[fg] >> 0) & 0xff) >> (8 - FI->blue_mask_size)) << FI->blue_mask_pos) |
((((vga_colors[fg] >> 8) & 0xff) >> (8 - FI->green_mask_size)) << FI->green_mask_pos) |
((((vga_colors[fg] >> 16) & 0xff) >> (8 - FI->red_mask_size)) << FI->red_mask_pos);
}
dst = FB + ((row * FONT_HEIGHT) * FI->bytes_per_line);
dst += (col * FONT_WIDTH * (FI->bits_per_pixel >> 3));
for(y = 0; y < FONT_HEIGHT; y++) {
for(x = FONT_WIDTH - 1; x >= 0; x--) {
switch (FI->bits_per_pixel) {
case 8: /* Indexed */
dst[(FONT_WIDTH - x) * (FI->bits_per_pixel >> 3)] = (*glyph & (1 << x)) ? fg : bg;
break;
case 16: /* 16 bpp */
dst16 = (u16 *)(dst + (FONT_WIDTH - x) * (FI->bits_per_pixel >> 3));
*dst16 = (*glyph & (1 << x)) ? fgval : bgval;
break;
case 24: /* 24 bpp */
if (*glyph & (1 << x)) {
dst[(FONT_WIDTH - x) * (FI->bits_per_pixel >> 3) + 0] = fgval & 0xff;
dst[(FONT_WIDTH - x) * (FI->bits_per_pixel >> 3) + 1] = (fgval >> 8) & 0xff;
dst[(FONT_WIDTH - x) * (FI->bits_per_pixel >> 3) + 2] = (fgval >> 16) & 0xff;
} else {
dst[(FONT_WIDTH - x) * (FI->bits_per_pixel >> 3) + 0] = bgval & 0xff;
dst[(FONT_WIDTH - x) * (FI->bits_per_pixel >> 3) + 1] = (bgval >> 8) & 0xff;
dst[(FONT_WIDTH - x) * (FI->bits_per_pixel >> 3) + 2] = (bgval >> 16) & 0xff;
}
break;
case 32: /* 32 bpp */
dst32 = (u32 *)(dst + (FONT_WIDTH - x) * (FI->bits_per_pixel >> 3));
*dst32 = (*glyph & (1 << x)) ? fgval : bgval;
break;
}
}
dst += FI->bytes_per_line;
glyph++;
}
}
static void corebootfb_putc(u8 row, u8 col, unsigned int ch)
{
CHARS[row * coreboot_video_console.columns + col] = ch;
corebootfb_putchar(row, col, ch);
}
static void corebootfb_update_cursor(void)
{
int ch, paint;
if(cursor_en) {
ch = CHARS[cursor_y * coreboot_video_console.columns + cursor_x];
paint = (ch & 0xff) | ((ch << 4) & 0xf000) | ((ch >> 4) & 0x0f00);
} else {
paint = CHARS[cursor_y * coreboot_video_console.columns + cursor_x];
}
if (cursor_y < coreboot_video_console.rows)
corebootfb_putchar(cursor_y, cursor_x, paint);
}
static void corebootfb_enable_cursor(int state)
{
cursor_en = state;
corebootfb_update_cursor();
}
static void corebootfb_get_cursor(unsigned int *x, unsigned int *y, unsigned int *en)
{
*x = cursor_x;
*y = cursor_y;
*en = cursor_en;
}
static void corebootfb_set_cursor(unsigned int x, unsigned int y)
{
int cursor_remember = cursor_en;
if (cursor_remember)
corebootfb_enable_cursor(0);
cursor_x = x;
cursor_y = y;
if (cursor_remember)
corebootfb_enable_cursor(1);
}
static int corebootfb_init(void)
{
if (lib_sysinfo.framebuffer == NULL)
return -1;
/* We might have been called before relocation (like FILO does). So
just keep the physical address which won't break on relocation. */
fbinfo = virt_to_phys(lib_sysinfo.framebuffer);
fbaddr = FI->physical_address;
if (fbaddr == 0)
return -1;
coreboot_video_console.columns = FI->x_resolution / FONT_WIDTH;
coreboot_video_console.rows = FI->y_resolution / FONT_HEIGHT;
/* See setting of fbinfo above. */
chars = virt_to_phys(malloc(coreboot_video_console.rows *
coreboot_video_console.columns * 2));
// clear boot splash screen if there is one.
corebootfb_clear();
return 0;
}
struct video_console coreboot_video_console = {
.init = corebootfb_init,
.putc = corebootfb_putc,
.clear = corebootfb_clear,
.scroll_up = corebootfb_scroll_up,
.get_cursor = corebootfb_get_cursor,
.set_cursor = corebootfb_set_cursor,
.enable_cursor = corebootfb_enable_cursor,
.columns = 80,
.rows = 25
};