[PATCH] x86_64: Add boot option to disable randomized mappings and cleanup
[linux-2.6] / arch / i386 / kernel / cpu / transmeta.c
1 #include <linux/kernel.h>
2 #include <linux/mm.h>
3 #include <linux/init.h>
4 #include <asm/processor.h>
5 #include <asm/msr.h>
6 #include "cpu.h"
7
8 static void __init init_transmeta(struct cpuinfo_x86 *c)
9 {
10         unsigned int cap_mask, uk, max, dummy;
11         unsigned int cms_rev1, cms_rev2;
12         unsigned int cpu_rev, cpu_freq, cpu_flags, new_cpu_rev;
13         char cpu_info[65];
14
15         get_model_name(c);      /* Same as AMD/Cyrix */
16         display_cacheinfo(c);
17
18         /* Print CMS and CPU revision */
19         max = cpuid_eax(0x80860000);
20         cpu_rev = 0;
21         if ( max >= 0x80860001 ) {
22                 cpuid(0x80860001, &dummy, &cpu_rev, &cpu_freq, &cpu_flags); 
23                 if (cpu_rev != 0x02000000) {
24                         printk(KERN_INFO "CPU: Processor revision %u.%u.%u.%u, %u MHz\n",
25                                 (cpu_rev >> 24) & 0xff,
26                                 (cpu_rev >> 16) & 0xff,
27                                 (cpu_rev >> 8) & 0xff,
28                                 cpu_rev & 0xff,
29                                 cpu_freq);
30                 }
31         }
32         if ( max >= 0x80860002 ) {
33                 cpuid(0x80860002, &new_cpu_rev, &cms_rev1, &cms_rev2, &dummy);
34                 if (cpu_rev == 0x02000000) {
35                         printk(KERN_INFO "CPU: Processor revision %08X, %u MHz\n",
36                                 new_cpu_rev, cpu_freq);
37                 }
38                 printk(KERN_INFO "CPU: Code Morphing Software revision %u.%u.%u-%u-%u\n",
39                        (cms_rev1 >> 24) & 0xff,
40                        (cms_rev1 >> 16) & 0xff,
41                        (cms_rev1 >> 8) & 0xff,
42                        cms_rev1 & 0xff,
43                        cms_rev2);
44         }
45         if ( max >= 0x80860006 ) {
46                 cpuid(0x80860003,
47                       (void *)&cpu_info[0],
48                       (void *)&cpu_info[4],
49                       (void *)&cpu_info[8],
50                       (void *)&cpu_info[12]);
51                 cpuid(0x80860004,
52                       (void *)&cpu_info[16],
53                       (void *)&cpu_info[20],
54                       (void *)&cpu_info[24],
55                       (void *)&cpu_info[28]);
56                 cpuid(0x80860005,
57                       (void *)&cpu_info[32],
58                       (void *)&cpu_info[36],
59                       (void *)&cpu_info[40],
60                       (void *)&cpu_info[44]);
61                 cpuid(0x80860006,
62                       (void *)&cpu_info[48],
63                       (void *)&cpu_info[52],
64                       (void *)&cpu_info[56],
65                       (void *)&cpu_info[60]);
66                 cpu_info[64] = '\0';
67                 printk(KERN_INFO "CPU: %s\n", cpu_info);
68         }
69
70         /* Unhide possibly hidden capability flags */
71         rdmsr(0x80860004, cap_mask, uk);
72         wrmsr(0x80860004, ~0, uk);
73         c->x86_capability[0] = cpuid_edx(0x00000001);
74         wrmsr(0x80860004, cap_mask, uk);
75         
76         /* If we can run i686 user-space code, call us an i686 */
77 #define USER686 (X86_FEATURE_TSC|X86_FEATURE_CX8|X86_FEATURE_CMOV)
78         if ( c->x86 == 5 && (c->x86_capability[0] & USER686) == USER686 )
79                 c->x86 = 6;
80
81 #ifdef CONFIG_SYSCTL
82         /* randomize_va_space slows us down enormously;
83            it probably triggers retranslation of x86->native bytecode */
84         randomize_va_space = 0;
85 #endif
86 }
87
88 static void __init transmeta_identify(struct cpuinfo_x86 * c)
89 {
90         u32 xlvl;
91         generic_identify(c);
92
93         /* Transmeta-defined flags: level 0x80860001 */
94         xlvl = cpuid_eax(0x80860000);
95         if ( (xlvl & 0xffff0000) == 0x80860000 ) {
96                 if (  xlvl >= 0x80860001 )
97                         c->x86_capability[2] = cpuid_edx(0x80860001);
98         }
99 }
100
101 static struct cpu_dev transmeta_cpu_dev __initdata = {
102         .c_vendor       = "Transmeta",
103         .c_ident        = { "GenuineTMx86", "TransmetaCPU" },
104         .c_init         = init_transmeta,
105         .c_identify     = transmeta_identify,
106 };
107
108 int __init transmeta_init_cpu(void)
109 {
110         cpu_devs[X86_VENDOR_TRANSMETA] = &transmeta_cpu_dev;
111         return 0;
112 }
113
114 //early_arch_initcall(transmeta_init_cpu);
115
116 static int __init transmeta_exit_cpu(void)
117 {
118         cpu_devs[X86_VENDOR_TRANSMETA] = NULL;
119         return 0;
120 }
121
122 late_initcall(transmeta_exit_cpu);