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- /*
- * Copyright (C) 2015 Michael Brown <mbrown@fensystems.co.uk>.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- * 02110-1301, USA.
- *
- * You can also choose to distribute this program under the terms of
- * the Unmodified Binary Distribution Licence (as given in the file
- * COPYING.UBDL), provided that you have satisfied its requirements.
- */
-
- FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
-
- #include <ipxe/uaccess.h>
- #include <ipxe/settings.h>
-
- /** @file
- *
- * Video RAM dump
- *
- */
-
- /** Video RAM base address */
- #define VRAM_BASE 0xb8000
-
- /** Video RAM length */
- #define VRAM_LEN \
- ( 80 /* columns */ * 25 /* rows */ * 2 /* bytes per character */ )
-
- /**
- * Fetch video RAM setting
- *
- * @v data Buffer to fill with setting data
- * @v len Length of buffer
- * @ret len Length of setting data, or negative error
- */
- static int vram_fetch ( void *data, size_t len ) {
- userptr_t vram = phys_to_user ( VRAM_BASE );
-
- /* Copy video RAM */
- if ( len > VRAM_LEN )
- len = VRAM_LEN;
- copy_from_user ( data, vram, 0, len );
-
- return VRAM_LEN;
- }
-
- /** Video RAM setting */
- const struct setting vram_setting __setting ( SETTING_MISC, vram ) = {
- .name = "vram",
- .description = "Video RAM",
- .type = &setting_type_base64,
- .scope = &builtin_scope,
- };
-
- /** Video RAM built-in setting */
- struct builtin_setting vram_builtin_setting __builtin_setting = {
- .setting = &vram_setting,
- .fetch = vram_fetch,
- };
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