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BVK Chaitanya
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810 changed files with 4980 additions and 2508 deletions
179
grub-core/commands/i386/pc/vbetest.c
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179
grub-core/commands/i386/pc/vbetest.c
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/* vbetest.c - command to test VESA BIOS Extension 2.0+ support. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2005,2007 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/normal.h>
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#include <grub/dl.h>
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#include <grub/env.h>
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#include <grub/misc.h>
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#include <grub/term.h>
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#include <grub/machine/init.h>
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#include <grub/machine/vbe.h>
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#include <grub/video.h>
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#include <grub/err.h>
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#include <grub/i18n.h>
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static grub_err_t
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grub_cmd_vbetest (grub_command_t cmd __attribute__ ((unused)),
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int argc __attribute__ ((unused)),
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char **args __attribute__ ((unused)))
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{
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grub_err_t err;
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char *modevar;
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struct grub_vbe_mode_info_block mode_info;
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struct grub_vbe_info_block controller_info;
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grub_uint32_t use_mode = GRUB_VBE_DEFAULT_VIDEO_MODE;
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grub_uint32_t old_mode;
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grub_uint8_t *framebuffer = 0;
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grub_uint32_t bytes_per_scan_line = 0;
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unsigned char *ptr;
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int i;
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grub_printf ("Probing for VESA BIOS Extension ... ");
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/* Check if VESA BIOS exists. */
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err = grub_vbe_probe (&controller_info);
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if (err != GRUB_ERR_NONE)
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return err;
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grub_printf ("found!\n");
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/* Dump out controller information. */
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grub_printf ("VBE signature = %c%c%c%c\n",
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controller_info.signature[0],
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controller_info.signature[1],
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controller_info.signature[2],
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controller_info.signature[3]);
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grub_printf ("VBE version = %d.%d\n",
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controller_info.version >> 8,
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controller_info.version & 0xFF);
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grub_printf ("OEM string ptr = %08x\n",
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controller_info.oem_string_ptr);
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grub_printf ("Total memory = %d\n",
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controller_info.total_memory);
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err = grub_vbe_get_video_mode (&old_mode);
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grub_printf ("Get video mode err = %04x\n", err);
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if (err == GRUB_ERR_NONE)
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grub_printf ("Old video mode = %04x\n", old_mode);
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else
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grub_errno = GRUB_ERR_NONE;
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/* Check existence of vbe_mode environment variable. */
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modevar = grub_env_get ("vbe_mode");
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if (modevar != 0)
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{
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unsigned long value;
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value = grub_strtoul (modevar, 0, 0);
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if (grub_errno == GRUB_ERR_NONE)
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use_mode = value;
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else
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grub_errno = GRUB_ERR_NONE;
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}
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err = grub_vbe_get_video_mode_info (use_mode, &mode_info);
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if (err != GRUB_ERR_NONE)
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return err;
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/* Dump out details about the mode being tested. */
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grub_printf ("mode: 0x%03x\n",
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use_mode);
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grub_printf ("width : %d\n",
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mode_info.x_resolution);
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grub_printf ("height: %d\n",
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mode_info.y_resolution);
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grub_printf ("memory model: %02x\n",
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mode_info.memory_model);
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grub_printf ("bytes/scanline: %d\n",
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mode_info.bytes_per_scan_line);
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grub_printf ("bytes/scanline (lin): %d\n",
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mode_info.lin_bytes_per_scan_line);
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grub_printf ("base address: %08x\n",
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mode_info.phys_base_addr);
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grub_printf ("red mask/pos: %d/%d\n",
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mode_info.red_mask_size,
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mode_info.red_field_position);
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grub_printf ("green mask/pos: %d/%d\n",
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mode_info.green_mask_size,
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mode_info.green_field_position);
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grub_printf ("blue mask/pos: %d/%d\n",
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mode_info.blue_mask_size,
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mode_info.blue_field_position);
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grub_printf ("Press any key to continue.\n");
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grub_getkey ();
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/* Setup GFX mode. */
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err = grub_vbe_set_video_mode (use_mode, &mode_info);
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if (err != GRUB_ERR_NONE)
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return err;
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/* Determine framebuffer address and how many bytes are in scan line. */
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framebuffer = (grub_uint8_t *) mode_info.phys_base_addr;
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ptr = framebuffer;
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if (controller_info.version >= 0x300)
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{
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bytes_per_scan_line = mode_info.lin_bytes_per_scan_line;
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}
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else
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{
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bytes_per_scan_line = mode_info.bytes_per_scan_line;
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}
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/* Draw some random data to screen. */
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for (i = 0; i < 256 * 256; i++)
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{
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ptr[i] = i & 0x0F;
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}
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/* Draw white line to screen. */
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for (i = 0; i < 100; i++)
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{
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ptr[mode_info.bytes_per_scan_line * 50 + i] = 0x0F;
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}
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/* Draw another white line to screen. */
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grub_memset (ptr + bytes_per_scan_line * 51, 0x0f, bytes_per_scan_line);
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grub_getkey ();
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grub_video_restore ();
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/* Restore old video mode. */
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grub_vbe_set_video_mode (old_mode, 0);
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return grub_errno;
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}
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static grub_command_t cmd;
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GRUB_MOD_INIT(vbetest)
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{
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cmd = grub_register_command ("vbetest", grub_cmd_vbetest,
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0, N_("Test VESA BIOS Extension 2.0+ support."));
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}
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GRUB_MOD_FINI(vbetest)
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{
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grub_unregister_command (cmd);
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}
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