H. Peter Anvin | 31b54f4 | 2007-07-11 12:18:47 -0700 | [diff] [blame] | 1 | /* -*- linux-c -*- ------------------------------------------------------- * |
| 2 | * |
| 3 | * Copyright (C) 1991, 1992 Linus Torvalds |
| 4 | * Copyright 2007 rPath, Inc. - All Rights Reserved |
| 5 | * |
| 6 | * This file is part of the Linux kernel, and is made available under |
| 7 | * the terms of the GNU General Public License version 2. |
| 8 | * |
| 9 | * ----------------------------------------------------------------------- */ |
| 10 | |
| 11 | /* |
| 12 | * arch/i386/boot/cpu.c |
| 13 | * |
| 14 | * Check for obligatory CPU features and abort if the features are not |
| 15 | * present. |
| 16 | */ |
| 17 | |
| 18 | #include "boot.h" |
| 19 | #include "bitops.h" |
| 20 | #include <asm/cpufeature.h> |
| 21 | |
| 22 | static char *cpu_name(int level) |
| 23 | { |
| 24 | static char buf[6]; |
| 25 | |
| 26 | if (level == 64) { |
| 27 | return "x86-64"; |
| 28 | } else { |
| 29 | sprintf(buf, "i%d86", level); |
| 30 | return buf; |
| 31 | } |
| 32 | } |
| 33 | |
| 34 | int validate_cpu(void) |
| 35 | { |
| 36 | u32 *err_flags; |
| 37 | int cpu_level, req_level; |
| 38 | |
| 39 | check_cpu(&cpu_level, &req_level, &err_flags); |
| 40 | |
| 41 | if (cpu_level < req_level) { |
| 42 | printf("This kernel requires an %s CPU, ", |
| 43 | cpu_name(req_level)); |
| 44 | printf("but only detected an %s CPU.\n", |
| 45 | cpu_name(cpu_level)); |
| 46 | return -1; |
| 47 | } |
| 48 | |
| 49 | if (err_flags) { |
| 50 | int i, j; |
| 51 | puts("This kernel requires the following features " |
| 52 | "not present on the CPU:\n"); |
| 53 | |
| 54 | for (i = 0; i < NCAPINTS; i++) { |
| 55 | u32 e = err_flags[i]; |
| 56 | |
| 57 | for (j = 0; j < 32; j++) { |
| 58 | if (e & 1) |
| 59 | printf("%d:%d ", i, j); |
| 60 | |
| 61 | e >>= 1; |
| 62 | } |
| 63 | } |
| 64 | putchar('\n'); |
| 65 | return -1; |
| 66 | } else { |
| 67 | return 0; |
| 68 | } |
| 69 | } |