diff options
author | H. Peter Anvin <hpa@linux.intel.com> | 2010-03-30 15:05:17 -0700 |
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committer | H. Peter Anvin <hpa@linux.intel.com> | 2010-03-30 15:05:17 -0700 |
commit | d71b34b80fbee1df019129971d1cec2568705213 (patch) | |
tree | 79bdd4eb94a2ae40c1f497be004a4da2e4ca02fd | |
parent | ec127e4bce415e103da3ba02d0e7adee2bcc1344 (diff) | |
download | syslinux-d71b34b80fbee1df019129971d1cec2568705213.tar.gz |
cpuid.c32: very simple low-level CPUID info CLI routine
Add a very simple com32 program to dump a single CPUID leaf.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
-rw-r--r-- | com32/modules/Makefile | 3 | ||||
-rw-r--r-- | com32/modules/cpuid.c | 60 |
2 files changed, 62 insertions, 1 deletions
diff --git a/com32/modules/Makefile b/com32/modules/Makefile index 35906587..44bc1dfb 100644 --- a/com32/modules/Makefile +++ b/com32/modules/Makefile @@ -21,7 +21,8 @@ include ../MCONFIG MODULES = chain.c32 config.c32 ethersel.c32 dmitest.c32 cpuidtest.c32 \ disk.c32 pcitest.c32 elf.c32 linux.c32 reboot.c32 pmload.c32 \ meminfo.c32 sdi.c32 sanboot.c32 ifcpu64.c32 vesainfo.c32 \ - kbdmap.c32 cmd.c32 vpdtest.c32 gpxecmd.c32 ifcpu.c32 + kbdmap.c32 cmd.c32 vpdtest.c32 gpxecmd.c32 ifcpu.c32 \ + cpuid.c32 TESTFILES = diff --git a/com32/modules/cpuid.c b/com32/modules/cpuid.c new file mode 100644 index 00000000..4758fbad --- /dev/null +++ b/com32/modules/cpuid.c @@ -0,0 +1,60 @@ +/* ----------------------------------------------------------------------- * + * + * Copyright 2010 Intel Corporation; author: H. Peter Anvin + * + * 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, Inc., 51 Franklin St, Fifth Floor, + * Boston MA 02110-1301, USA; either version 2 of the License, or + * (at your option) any later version; incorporated herein by reference. + * + * ----------------------------------------------------------------------- */ + +#include <stdio.h> +#include <stdlib.h> +#include <sys/cpu.h> +#include <console.h> +#include <com32.h> + +static void dump_reg(const char *name, uint32_t val) +{ + int i; + + printf("%-3s : %10d 0x%08x ", name, val, val); + + for (i = 3; i >= 0; i--) { + uint8_t c = val >> (i*8); + putchar((c >= ' ' && c <= '~') ? c : '.'); + } + putchar('\n'); +} + +int main(int argc, char *argv[]) +{ + uint32_t leaf, counter; + uint32_t eax, ebx, ecx, edx; + + openconsole(&dev_null_r, &dev_stdcon_w); + + if (argc < 2 || argc > 4) { + printf("Usage: %s leaf [counter]\n", argv[0]); + exit(1); + } + + leaf = strtoul(argv[1], NULL, 0); + counter = (argv > 2) ? strtoul(argv[2], NULL, 0) : 0; + + if (!cpu_has_eflag(EFLAGS_ID)) { + printf("The CPUID instruction is not supported\n"); + exit(1); + } + + cpuid_count(leaf, counter, &eax, &ebx, &ecx, &edx); + + dump_reg("eax", eax); + dump_reg("eax", ebx); + dump_reg("eax", ecx); + dump_reg("eax", edx); + + return 0; +} |