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 
early_init_transmeta(struct cpuinfo_x86 * c)8 static void __cpuinit early_init_transmeta(struct cpuinfo_x86 *c)
9 {
10 	u32 xlvl;
11 
12 	/* Transmeta-defined flags: level 0x80860001 */
13 	xlvl = cpuid_eax(0x80860000);
14 	if ((xlvl & 0xffff0000) == 0x80860000) {
15 		if (xlvl >= 0x80860001)
16 			c->x86_capability[2] = cpuid_edx(0x80860001);
17 	}
18 }
19 
init_transmeta(struct cpuinfo_x86 * c)20 static void __cpuinit init_transmeta(struct cpuinfo_x86 *c)
21 {
22 	unsigned int cap_mask, uk, max, dummy;
23 	unsigned int cms_rev1, cms_rev2;
24 	unsigned int cpu_rev, cpu_freq = 0, cpu_flags, new_cpu_rev;
25 	char cpu_info[65];
26 
27 	early_init_transmeta(c);
28 
29 	cpu_detect_cache_sizes(c);
30 
31 	/* Print CMS and CPU revision */
32 	max = cpuid_eax(0x80860000);
33 	cpu_rev = 0;
34 	if (max >= 0x80860001) {
35 		cpuid(0x80860001, &dummy, &cpu_rev, &cpu_freq, &cpu_flags);
36 		if (cpu_rev != 0x02000000) {
37 			printk(KERN_INFO "CPU: Processor revision %u.%u.%u.%u, %u MHz\n",
38 				(cpu_rev >> 24) & 0xff,
39 				(cpu_rev >> 16) & 0xff,
40 				(cpu_rev >> 8) & 0xff,
41 				cpu_rev & 0xff,
42 				cpu_freq);
43 		}
44 	}
45 	if (max >= 0x80860002) {
46 		cpuid(0x80860002, &new_cpu_rev, &cms_rev1, &cms_rev2, &dummy);
47 		if (cpu_rev == 0x02000000) {
48 			printk(KERN_INFO "CPU: Processor revision %08X, %u MHz\n",
49 				new_cpu_rev, cpu_freq);
50 		}
51 		printk(KERN_INFO "CPU: Code Morphing Software revision %u.%u.%u-%u-%u\n",
52 		       (cms_rev1 >> 24) & 0xff,
53 		       (cms_rev1 >> 16) & 0xff,
54 		       (cms_rev1 >> 8) & 0xff,
55 		       cms_rev1 & 0xff,
56 		       cms_rev2);
57 	}
58 	if (max >= 0x80860006) {
59 		cpuid(0x80860003,
60 		      (void *)&cpu_info[0],
61 		      (void *)&cpu_info[4],
62 		      (void *)&cpu_info[8],
63 		      (void *)&cpu_info[12]);
64 		cpuid(0x80860004,
65 		      (void *)&cpu_info[16],
66 		      (void *)&cpu_info[20],
67 		      (void *)&cpu_info[24],
68 		      (void *)&cpu_info[28]);
69 		cpuid(0x80860005,
70 		      (void *)&cpu_info[32],
71 		      (void *)&cpu_info[36],
72 		      (void *)&cpu_info[40],
73 		      (void *)&cpu_info[44]);
74 		cpuid(0x80860006,
75 		      (void *)&cpu_info[48],
76 		      (void *)&cpu_info[52],
77 		      (void *)&cpu_info[56],
78 		      (void *)&cpu_info[60]);
79 		cpu_info[64] = '\0';
80 		printk(KERN_INFO "CPU: %s\n", cpu_info);
81 	}
82 
83 	/* Unhide possibly hidden capability flags */
84 	rdmsr(0x80860004, cap_mask, uk);
85 	wrmsr(0x80860004, ~0, uk);
86 	c->x86_capability[0] = cpuid_edx(0x00000001);
87 	wrmsr(0x80860004, cap_mask, uk);
88 
89 	/* All Transmeta CPUs have a constant TSC */
90 	set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
91 
92 #ifdef CONFIG_SYSCTL
93 	/*
94 	 * randomize_va_space slows us down enormously;
95 	 * it probably triggers retranslation of x86->native bytecode
96 	 */
97 	randomize_va_space = 0;
98 #endif
99 }
100 
101 static const struct cpu_dev __cpuinitconst transmeta_cpu_dev = {
102 	.c_vendor	= "Transmeta",
103 	.c_ident	= { "GenuineTMx86", "TransmetaCPU" },
104 	.c_early_init	= early_init_transmeta,
105 	.c_init		= init_transmeta,
106 	.c_x86_vendor	= X86_VENDOR_TRANSMETA,
107 };
108 
109 cpu_dev_register(transmeta_cpu_dev);
110