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author | 2015-08-28 09:58:54 +0800 | |
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committer | 2015-09-01 12:44:00 +0800 | |
commit | e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch) | |
tree | 66b09f592c55df2878107a468a91d21506104d3f /qemu/roms/ipxe/src/arch/x86/hci/commands/cpuid_cmd.c | |
parent | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff) |
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/roms/ipxe/src/arch/x86/hci/commands/cpuid_cmd.c')
-rw-r--r-- | qemu/roms/ipxe/src/arch/x86/hci/commands/cpuid_cmd.c | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/qemu/roms/ipxe/src/arch/x86/hci/commands/cpuid_cmd.c b/qemu/roms/ipxe/src/arch/x86/hci/commands/cpuid_cmd.c new file mode 100644 index 000000000..c4e35d179 --- /dev/null +++ b/qemu/roms/ipxe/src/arch/x86/hci/commands/cpuid_cmd.c @@ -0,0 +1,97 @@ +/* + * Copyright (C) 2012 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. + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +#include <stdint.h> +#include <stdio.h> +#include <errno.h> +#include <getopt.h> +#include <ipxe/cpuid.h> +#include <ipxe/command.h> +#include <ipxe/parseopt.h> + +/** @file + * + * x86 CPU feature detection command + * + */ + +/** "cpuid" options */ +struct cpuid_options { + /** Check AMD-defined features (%eax=0x80000001) */ + int amd; + /** Check features defined via %ecx */ + int ecx; +}; + +/** "cpuid" option list */ +static struct option_descriptor cpuid_opts[] = { + OPTION_DESC ( "ext", 'e', no_argument, + struct cpuid_options, amd, parse_flag ), + /* "--amd" retained for backwards compatibility */ + OPTION_DESC ( "amd", 'a', no_argument, + struct cpuid_options, amd, parse_flag ), + OPTION_DESC ( "ecx", 'c', no_argument, + struct cpuid_options, ecx, parse_flag ), +}; + +/** "cpuid" command descriptor */ +static struct command_descriptor cpuid_cmd = + COMMAND_DESC ( struct cpuid_options, cpuid_opts, 1, 1, "<bit>" ); + +/** + * The "cpuid" command + * + * @v argc Argument count + * @v argv Argument list + * @ret rc Return status code + */ +static int cpuid_exec ( int argc, char **argv ) { + struct cpuid_options opts; + struct x86_features features; + struct x86_feature_registers *feature_regs; + uint32_t feature_reg; + unsigned int bit; + int rc; + + /* Parse options */ + if ( ( rc = parse_options ( argc, argv, &cpuid_cmd, &opts ) ) != 0 ) + return rc; + + /* Parse bit number */ + if ( ( rc = parse_integer ( argv[optind], &bit ) ) != 0 ) + return rc; + + /* Get CPU features */ + x86_features ( &features ); + + /* Extract relevant feature register */ + feature_regs = ( opts.amd ? &features.amd : &features.intel ); + feature_reg = ( opts.ecx ? feature_regs->ecx : feature_regs->edx ); + + /* Check presence of specified feature */ + return ( ( feature_reg & ( 1 << bit ) ) ? 0 : -ENOENT ); +} + +/** x86 CPU feature detection command */ +struct command cpuid_command __command = { + .name = "cpuid", + .exec = cpuid_exec, +}; |