From 96ae6ea0be1b902c28b3b463c27da42b41e2b63a Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 11 Oct 2007 11:16:45 +0200 Subject: i386: move boot Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner Signed-off-by: Ingo Molnar --- arch/x86/boot/cpu.c | 69 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 arch/x86/boot/cpu.c (limited to 'arch/x86/boot/cpu.c') diff --git a/arch/x86/boot/cpu.c b/arch/x86/boot/cpu.c new file mode 100644 index 00000000000..2a5c32da585 --- /dev/null +++ b/arch/x86/boot/cpu.c @@ -0,0 +1,69 @@ +/* -*- linux-c -*- ------------------------------------------------------- * + * + * Copyright (C) 1991, 1992 Linus Torvalds + * Copyright 2007 rPath, Inc. - All Rights Reserved + * + * This file is part of the Linux kernel, and is made available under + * the terms of the GNU General Public License version 2. + * + * ----------------------------------------------------------------------- */ + +/* + * arch/i386/boot/cpu.c + * + * Check for obligatory CPU features and abort if the features are not + * present. + */ + +#include "boot.h" +#include "bitops.h" +#include + +static char *cpu_name(int level) +{ + static char buf[6]; + + if (level == 64) { + return "x86-64"; + } else { + sprintf(buf, "i%d86", level); + return buf; + } +} + +int validate_cpu(void) +{ + u32 *err_flags; + int cpu_level, req_level; + + check_cpu(&cpu_level, &req_level, &err_flags); + + if (cpu_level < req_level) { + printf("This kernel requires an %s CPU, ", + cpu_name(req_level)); + printf("but only detected an %s CPU.\n", + cpu_name(cpu_level)); + return -1; + } + + if (err_flags) { + int i, j; + puts("This kernel requires the following features " + "not present on the CPU:\n"); + + for (i = 0; i < NCAPINTS; i++) { + u32 e = err_flags[i]; + + for (j = 0; j < 32; j++) { + if (e & 1) + printf("%d:%d ", i, j); + + e >>= 1; + } + } + putchar('\n'); + return -1; + } else { + return 0; + } +} -- cgit v1.2.3