1#include <linux/kernel.h>
2#include <linux/mm.h>
3#include <asm/processor.h>
4#include <asm/msr.h>
5#include "cpu.h"
6
7static void early_init_transmeta(struct cpuinfo_x86 *c)
8{
9	u32 xlvl;
10
11	/* Transmeta-defined flags: level 0x80860001 */
12	xlvl = cpuid_eax(0x80860000);
13	if ((xlvl & 0xffff0000) == 0x80860000) {
14		if (xlvl >= 0x80860001)
15			c->x86_capability[2] = cpuid_edx(0x80860001);
16	}
17}
18
19static void init_transmeta(struct cpuinfo_x86 *c)
20{
21	unsigned int cap_mask, uk, max, dummy;
22	unsigned int cms_rev1, cms_rev2;
23	unsigned int cpu_rev, cpu_freq = 0, cpu_flags, new_cpu_rev;
24	char cpu_info[65];
25
26	early_init_transmeta(c);
27
28	cpu_detect_cache_sizes(c);
29
30	/* Print CMS and CPU revision */
31	max = cpuid_eax(0x80860000);
32	cpu_rev = 0;
33	if (max >= 0x80860001) {
34		cpuid(0x80860001, &dummy, &cpu_rev, &cpu_freq, &cpu_flags);
35		if (cpu_rev != 0x02000000) {
36			printk(KERN_INFO "CPU: Processor revision %u.%u.%u.%u, %u MHz\n",
37				(cpu_rev >> 24) & 0xff,
38				(cpu_rev >> 16) & 0xff,
39				(cpu_rev >> 8) & 0xff,
40				cpu_rev & 0xff,
41				cpu_freq);
42		}
43	}
44	if (max >= 0x80860002) {
45		cpuid(0x80860002, &new_cpu_rev, &cms_rev1, &cms_rev2, &dummy);
46		if (cpu_rev == 0x02000000) {
47			printk(KERN_INFO "CPU: Processor revision %08X, %u MHz\n",
48				new_cpu_rev, cpu_freq);
49		}
50		printk(KERN_INFO "CPU: Code Morphing Software revision %u.%u.%u-%u-%u\n",
51		       (cms_rev1 >> 24) & 0xff,
52		       (cms_rev1 >> 16) & 0xff,
53		       (cms_rev1 >> 8) & 0xff,
54		       cms_rev1 & 0xff,
55		       cms_rev2);
56	}
57	if (max >= 0x80860006) {
58		cpuid(0x80860003,
59		      (void *)&cpu_info[0],
60		      (void *)&cpu_info[4],
61		      (void *)&cpu_info[8],
62		      (void *)&cpu_info[12]);
63		cpuid(0x80860004,
64		      (void *)&cpu_info[16],
65		      (void *)&cpu_info[20],
66		      (void *)&cpu_info[24],
67		      (void *)&cpu_info[28]);
68		cpuid(0x80860005,
69		      (void *)&cpu_info[32],
70		      (void *)&cpu_info[36],
71		      (void *)&cpu_info[40],
72		      (void *)&cpu_info[44]);
73		cpuid(0x80860006,
74		      (void *)&cpu_info[48],
75		      (void *)&cpu_info[52],
76		      (void *)&cpu_info[56],
77		      (void *)&cpu_info[60]);
78		cpu_info[64] = '\0';
79		printk(KERN_INFO "CPU: %s\n", cpu_info);
80	}
81
82	/* Unhide possibly hidden capability flags */
83	rdmsr(0x80860004, cap_mask, uk);
84	wrmsr(0x80860004, ~0, uk);
85	c->x86_capability[0] = cpuid_edx(0x00000001);
86	wrmsr(0x80860004, cap_mask, uk);
87
88	/* All Transmeta CPUs have a constant TSC */
89	set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
90
91#ifdef CONFIG_SYSCTL
92	/*
93	 * randomize_va_space slows us down enormously;
94	 * it probably triggers retranslation of x86->native bytecode
95	 */
96	randomize_va_space = 0;
97#endif
98}
99
100static const struct cpu_dev transmeta_cpu_dev = {
101	.c_vendor	= "Transmeta",
102	.c_ident	= { "GenuineTMx86", "TransmetaCPU" },
103	.c_early_init	= early_init_transmeta,
104	.c_init		= init_transmeta,
105	.c_x86_vendor	= X86_VENDOR_TRANSMETA,
106};
107
108cpu_dev_register(transmeta_cpu_dev);
109