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31b54f40 PA |
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 | } |