Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 | 2 | #include <linux/kernel.h> |
acb04058 | 3 | #include <linux/sched.h> |
e6017571 | 4 | #include <linux/sched/clock.h> |
a62eaf15 | 5 | #include <linux/mm.h> |
cd4d09ec | 6 | #include <asm/cpufeature.h> |
1da177e4 LT |
7 | #include <asm/msr.h> |
8 | #include "cpu.h" | |
9 | ||
148f9bb8 | 10 | static void early_init_transmeta(struct cpuinfo_x86 *c) |
afae8656 YL |
11 | { |
12 | u32 xlvl; | |
13 | ||
14 | /* Transmeta-defined flags: level 0x80860001 */ | |
15 | xlvl = cpuid_eax(0x80860000); | |
16 | if ((xlvl & 0xffff0000) == 0x80860000) { | |
17 | if (xlvl >= 0x80860001) | |
39c06df4 | 18 | c->x86_capability[CPUID_8086_0001_EDX] = cpuid_edx(0x80860001); |
afae8656 YL |
19 | } |
20 | } | |
21 | ||
148f9bb8 | 22 | static void init_transmeta(struct cpuinfo_x86 *c) |
1da177e4 LT |
23 | { |
24 | unsigned int cap_mask, uk, max, dummy; | |
25 | unsigned int cms_rev1, cms_rev2; | |
7de6d361 | 26 | unsigned int cpu_rev, cpu_freq = 0, cpu_flags, new_cpu_rev; |
1da177e4 LT |
27 | char cpu_info[65]; |
28 | ||
afae8656 YL |
29 | early_init_transmeta(c); |
30 | ||
27c13ece | 31 | cpu_detect_cache_sizes(c); |
1da177e4 LT |
32 | |
33 | /* Print CMS and CPU revision */ | |
34 | max = cpuid_eax(0x80860000); | |
35 | cpu_rev = 0; | |
f9751827 PC |
36 | if (max >= 0x80860001) { |
37 | cpuid(0x80860001, &dummy, &cpu_rev, &cpu_freq, &cpu_flags); | |
1da177e4 | 38 | if (cpu_rev != 0x02000000) { |
1b74dde7 | 39 | pr_info("CPU: Processor revision %u.%u.%u.%u, %u MHz\n", |
1da177e4 LT |
40 | (cpu_rev >> 24) & 0xff, |
41 | (cpu_rev >> 16) & 0xff, | |
42 | (cpu_rev >> 8) & 0xff, | |
43 | cpu_rev & 0xff, | |
44 | cpu_freq); | |
45 | } | |
46 | } | |
f9751827 | 47 | if (max >= 0x80860002) { |
1da177e4 LT |
48 | cpuid(0x80860002, &new_cpu_rev, &cms_rev1, &cms_rev2, &dummy); |
49 | if (cpu_rev == 0x02000000) { | |
1b74dde7 | 50 | pr_info("CPU: Processor revision %08X, %u MHz\n", |
1da177e4 LT |
51 | new_cpu_rev, cpu_freq); |
52 | } | |
1b74dde7 | 53 | pr_info("CPU: Code Morphing Software revision %u.%u.%u-%u-%u\n", |
1da177e4 LT |
54 | (cms_rev1 >> 24) & 0xff, |
55 | (cms_rev1 >> 16) & 0xff, | |
56 | (cms_rev1 >> 8) & 0xff, | |
57 | cms_rev1 & 0xff, | |
58 | cms_rev2); | |
59 | } | |
f9751827 | 60 | if (max >= 0x80860006) { |
1da177e4 LT |
61 | cpuid(0x80860003, |
62 | (void *)&cpu_info[0], | |
63 | (void *)&cpu_info[4], | |
64 | (void *)&cpu_info[8], | |
65 | (void *)&cpu_info[12]); | |
66 | cpuid(0x80860004, | |
67 | (void *)&cpu_info[16], | |
68 | (void *)&cpu_info[20], | |
69 | (void *)&cpu_info[24], | |
70 | (void *)&cpu_info[28]); | |
71 | cpuid(0x80860005, | |
72 | (void *)&cpu_info[32], | |
73 | (void *)&cpu_info[36], | |
74 | (void *)&cpu_info[40], | |
75 | (void *)&cpu_info[44]); | |
76 | cpuid(0x80860006, | |
77 | (void *)&cpu_info[48], | |
78 | (void *)&cpu_info[52], | |
79 | (void *)&cpu_info[56], | |
80 | (void *)&cpu_info[60]); | |
81 | cpu_info[64] = '\0'; | |
1b74dde7 | 82 | pr_info("CPU: %s\n", cpu_info); |
1da177e4 LT |
83 | } |
84 | ||
85 | /* Unhide possibly hidden capability flags */ | |
86 | rdmsr(0x80860004, cap_mask, uk); | |
87 | wrmsr(0x80860004, ~0, uk); | |
39c06df4 | 88 | c->x86_capability[CPUID_1_EDX] = cpuid_edx(0x00000001); |
1da177e4 | 89 | wrmsr(0x80860004, cap_mask, uk); |
30b82ea0 PA |
90 | |
91 | /* All Transmeta CPUs have a constant TSC */ | |
10cd5a1e | 92 | set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC); |
f9751827 | 93 | |
39bbb07d | 94 | #ifdef CONFIG_SYSCTL |
f9751827 PC |
95 | /* |
96 | * randomize_va_space slows us down enormously; | |
97 | * it probably triggers retranslation of x86->native bytecode | |
98 | */ | |
cdf32eaa | 99 | randomize_va_space = 0; |
39bbb07d | 100 | #endif |
1da177e4 LT |
101 | } |
102 | ||
148f9bb8 | 103 | static const struct cpu_dev transmeta_cpu_dev = { |
1da177e4 LT |
104 | .c_vendor = "Transmeta", |
105 | .c_ident = { "GenuineTMx86", "TransmetaCPU" }, | |
afae8656 | 106 | .c_early_init = early_init_transmeta, |
1da177e4 | 107 | .c_init = init_transmeta, |
10a434fc | 108 | .c_x86_vendor = X86_VENDOR_TRANSMETA, |
1da177e4 LT |
109 | }; |
110 | ||
10a434fc | 111 | cpu_dev_register(transmeta_cpu_dev); |