Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / ipxe / src / arch / x86 / hci / commands / cpuid_cmd.c

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 (file)
index 0000000..c4e35d1
--- /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,
+};