X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=qemu%2Froms%2Fipxe%2Fsrc%2Farch%2Fx86%2Fcore%2Fvram_settings.c;fp=qemu%2Froms%2Fipxe%2Fsrc%2Farch%2Fx86%2Fcore%2Fvram_settings.c;h=9c169b40c865f0902e153c5972e1420ee40e975e;hb=437fd90c0250dee670290f9b714253671a990160;hp=0000000000000000000000000000000000000000;hpb=5bbd6fe9b8bab2a93e548c5a53b032d1939eec05;p=kvmfornfv.git diff --git a/qemu/roms/ipxe/src/arch/x86/core/vram_settings.c b/qemu/roms/ipxe/src/arch/x86/core/vram_settings.c new file mode 100644 index 000000000..9c169b40c --- /dev/null +++ b/qemu/roms/ipxe/src/arch/x86/core/vram_settings.c @@ -0,0 +1,72 @@ +/* + * Copyright (C) 2015 Michael Brown . + * + * 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 +#include + +/** @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, +};