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Diffstat (limited to 'payloads/libpayload/drivers/vga.c')
-rw-r--r--payloads/libpayload/drivers/vga.c212
1 files changed, 0 insertions, 212 deletions
diff --git a/payloads/libpayload/drivers/vga.c b/payloads/libpayload/drivers/vga.c
deleted file mode 100644
index db1cda170b..0000000000
--- a/payloads/libpayload/drivers/vga.c
+++ /dev/null
@@ -1,212 +0,0 @@
-/*
- * 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 <arch/types.h>
-#include <libpayload.h>
-
-#define WIDTH 80
-#define HEIGHT 25
-
-#define VGA_COLOR_WHITE 7
-
-#define CRTC_INDEX 0x3d4
-#define CRTC_DATA 0x3d5
-
-#define VIDEO(_r, _c) \
- ((uint16_t *) (0xB8000 + ((_r) * (WIDTH * 2)) + ((_c) * 2)))
-
-static int cursor_enabled;
-static int cursorx;
-static int cursory;
-
-static void vga_scroll_up(void);
-
-static inline uint8_t crtc_read(uint8_t index)
-{
- outb(index, CRTC_INDEX);
- return inb(CRTC_DATA);
-}
-
-static inline void crtc_write(uint8_t data, uint8_t index)
-{
- outb(index, CRTC_INDEX);
- outb(data, CRTC_DATA);
-}
-
-static void vga_get_cursor_pos(void)
-{
- unsigned int addr;
-
- addr = ((unsigned int)crtc_read(0x0E)) << 8;
- addr += crtc_read(0x0F);
-
- cursorx = addr % WIDTH;
- cursory = addr / WIDTH;
-}
-
-static void vga_fixup_cursor(void)
-{
- unsigned int addr;
-
- if (!cursor_enabled)
- return;
-
- if (cursorx < 0)
- cursorx = 0;
-
- if (cursory < 0)
- cursory = 0;
-
- if (cursorx >= WIDTH) {
- cursorx = 0;
- cursory++;
- }
-
- while (cursory >= HEIGHT)
- vga_scroll_up();
-
- addr = cursorx + (WIDTH * cursory);
- crtc_write(addr >> 8, 0x0E);
- crtc_write(addr, 0x0F);
-}
-
-void vga_cursor_enable(int state)
-{
- unsigned char tmp = crtc_read(0x0a);
-
- if (state == 0) {
- tmp |= (1 << 5);
- cursor_enabled = 0;
- } else {
- tmp &= ~(1 << 5);
- cursor_enabled = 1;
- vga_fixup_cursor();
- }
-
- crtc_write(tmp, 0x0a);
-}
-
-void vga_clear_line(uint8_t row, uint8_t ch, uint8_t attr)
-{
- int col;
- uint16_t *ptr = VIDEO(row, 0);
-
- for (col = 0; col < WIDTH; col++)
- ptr[col] = ((attr & 0xFF) << 8) | (ch & 0xFF);
-}
-
-static void vga_scroll_up(void)
-{
- uint16_t *src = VIDEO(1, 0);
- uint16_t *dst = VIDEO(0, 0);
- int i;
-
- for (i = 0; i < (HEIGHT - 1) * WIDTH; i++)
- *dst++ = *src++;
-
- vga_clear_line(HEIGHT - 1, ' ', VGA_COLOR_WHITE);
- cursory--;
-}
-
-void vga_fill(uint8_t ch, uint8_t attr)
-{
- uint8_t row;
- for (row = 0; row < HEIGHT; row++)
- vga_clear_line(row, ch, attr);
-}
-
-void vga_clear(void)
-{
- vga_fill(' ', VGA_COLOR_WHITE);
- vga_move_cursor(0, 0);
-}
-
-void vga_putc(uint8_t row, uint8_t col, unsigned int c)
-{
- uint16_t *ptr = VIDEO(row, col);
- *ptr = (uint16_t) (c & 0xFFFF);
-}
-
-void vga_putchar(unsigned int ch)
-{
-
- uint16_t *ptr;
-
- switch (ch & 0xFF) {
- case '\r':
- cursorx = 0;
- break;
- case '\n':
- cursory++;
- break;
- case '\b':
- cursorx--;
- ptr = VIDEO(cursory, cursorx);
- *ptr = (*ptr & 0xFF00) | ' ';
- break;
- case '\t':
- cursorx = (cursorx + 8) & ~7;
- break;
-
- default:
- ptr = VIDEO(cursory, cursorx);
- *ptr = (uint16_t) (ch & 0xFFFF);
- cursorx++;
- break;
- }
-
- vga_fixup_cursor();
-}
-
-void vga_move_cursor(int x, int y)
-{
- cursorx = x;
- cursory = y;
-
- vga_fixup_cursor();
-}
-
-void vga_init(void)
-{
- /* Get the position of the cursor. */
- vga_get_cursor_pos();
-
- /* See if it currently enabled or not. */
- cursor_enabled = !(crtc_read(0x0A) & (1 << 5));
-
- /* If the cursor is enabled, get us to a sane point. */
- if (cursor_enabled) {
- /* Go to the next line. */
- if (cursorx) {
- cursorx = 0;
- cursory++;
- }
- vga_fixup_cursor();
- }
-}