| 1 | |
| 2 | #include <linux/kernel.h>
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| 3 | #include <linux/sched.h>
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| 4 | #include <linux/sched/clock.h>
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| 5 | #include <linux/mm.h>
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| 6 |
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| 7 | #include <asm/cpufeature.h>
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| 8 | #include <asm/cpuid/api.h>
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| 9 | #include <asm/msr.h>
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| 10 |
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| 11 | #include "cpu.h"
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| 12 |
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| 13 | static void early_init_transmeta(struct cpuinfo_x86 *c)
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| 14 | {
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| 15 | u32 xlvl;
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| 16 |
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| 17 |
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| 18 | xlvl = cpuid_eax(0x80860000);
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| 19 | if ((xlvl & 0xffff0000) == 0x80860000) {
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| 20 | if (xlvl >= 0x80860001)
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| 21 | c->x86_capability[CPUID_8086_0001_EDX] = cpuid_edx(0x80860001);
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| 22 | }
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| 23 | }
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| 24 |
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| 25 | static void init_transmeta(struct cpuinfo_x86 *c)
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| 26 | {
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| 27 | u64 msr;
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| 28 | unsigned int max, dummy;
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| 29 | unsigned int cms_rev1, cms_rev2;
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| 30 | unsigned int cpu_rev, cpu_freq = 0, cpu_flags, new_cpu_rev;
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| 31 | char cpu_info[65];
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| 32 |
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| 33 | early_init_transmeta(c);
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| 34 |
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| 35 | cpu_detect_cache_sizes(c);
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| 36 |
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| 37 |
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| 38 | max = cpuid_eax(0x80860000);
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| 39 | cpu_rev = 0;
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| 40 | if (max >= 0x80860001) {
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| 41 | cpuid(0x80860001, &dummy, &cpu_rev, &cpu_freq, &cpu_flags);
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| 42 | if (cpu_rev != 0x02000000) {
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| 43 | pr_info("CPU: Processor revision %u.%u.%u.%u, %u MHz\n",
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| 44 | (cpu_rev >> 24) & 0xff,
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| 45 | (cpu_rev >> 16) & 0xff,
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| 46 | (cpu_rev >> 8) & 0xff,
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| 47 | cpu_rev & 0xff,
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| 48 | cpu_freq);
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| 49 | }
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| 50 | }
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| 51 | if (max >= 0x80860002) {
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| 52 | cpuid(0x80860002, &new_cpu_rev, &cms_rev1, &cms_rev2, &dummy);
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| 53 | if (cpu_rev == 0x02000000) {
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| 54 | pr_info("CPU: Processor revision %08X, %u MHz\n",
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| 55 | new_cpu_rev, cpu_freq);
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| 56 | }
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| 57 | pr_info("CPU: Code Morphing Software revision %u.%u.%u-%u-%u\n",
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| 58 | (cms_rev1 >> 24) & 0xff,
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| 59 | (cms_rev1 >> 16) & 0xff,
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| 60 | (cms_rev1 >> 8) & 0xff,
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| 61 | cms_rev1 & 0xff,
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| 62 | cms_rev2);
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| 63 | }
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| 64 | if (max >= 0x80860006) {
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| 65 | cpuid(0x80860003,
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| 66 | (void *)&cpu_info[0],
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| 67 | (void *)&cpu_info[4],
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| 68 | (void *)&cpu_info[8],
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| 69 | (void *)&cpu_info[12]);
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| 70 | cpuid(0x80860004,
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| 71 | (void *)&cpu_info[16],
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| 72 | (void *)&cpu_info[20],
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| 73 | (void *)&cpu_info[24],
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| 74 | (void *)&cpu_info[28]);
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| 75 | cpuid(0x80860005,
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| 76 | (void *)&cpu_info[32],
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| 77 | (void *)&cpu_info[36],
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| 78 | (void *)&cpu_info[40],
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| 79 | (void *)&cpu_info[44]);
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| 80 | cpuid(0x80860006,
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| 81 | (void *)&cpu_info[48],
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| 82 | (void *)&cpu_info[52],
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| 83 | (void *)&cpu_info[56],
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| 84 | (void *)&cpu_info[60]);
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| 85 | cpu_info[64] = '\0';
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| 86 | pr_info("CPU: %s\n", cpu_info);
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| 87 | }
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| 88 |
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| 89 |
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| 90 | rdmsrq(0x80860004, msr);
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| 91 | wrmsrq(0x80860004, msr | ~0U);
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| 92 | cpuid_refresh_leaf(c, 0x1);
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| 93 | c->x86_capability[CPUID_1_EDX] = cpuid_edx(0x00000001);
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| 94 | wrmsrq(0x80860004, msr);
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| 95 |
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| 96 |
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| 97 | set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
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| 98 |
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| 99 | #ifdef CONFIG_SYSCTL
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| 100 | |
| 101 | * randomize_va_space slows us down enormously;
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| 102 | * it probably triggers retranslation of x86->native bytecode
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| 103 |
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| 104 | randomize_va_space = 0;
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| 105 | #endif
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| 106 | }
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| 107 |
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| 108 | static const struct cpu_dev transmeta_cpu_dev = {
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| 109 | .c_vendor = "Transmeta",
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| 110 | .c_ident = { "GenuineTMx86", "TransmetaCPU" },
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| 111 | .c_early_init = early_init_transmeta,
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| 112 | .c_init = init_transmeta,
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| 113 | .c_x86_vendor = X86_VENDOR_TRANSMETA,
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| 114 | };
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| 115 |
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| 116 | cpu_dev_register(transmeta_cpu_dev);
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