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111 lines
2.9 KiB
111 lines
2.9 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/kernel.h> |
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#include <linux/sched.h> |
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#include <linux/sched/clock.h> |
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#include <linux/mm.h> |
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#include <asm/cpufeature.h> |
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#include <asm/msr.h> |
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#include "cpu.h" |
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static void early_init_transmeta(struct cpuinfo_x86 *c) |
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{ |
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u32 xlvl; |
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/* Transmeta-defined flags: level 0x80860001 */ |
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xlvl = cpuid_eax(0x80860000); |
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if ((xlvl & 0xffff0000) == 0x80860000) { |
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if (xlvl >= 0x80860001) |
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c->x86_capability[CPUID_8086_0001_EDX] = cpuid_edx(0x80860001); |
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} |
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} |
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static void init_transmeta(struct cpuinfo_x86 *c) |
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{ |
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unsigned int cap_mask, uk, max, dummy; |
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unsigned int cms_rev1, cms_rev2; |
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unsigned int cpu_rev, cpu_freq = 0, cpu_flags, new_cpu_rev; |
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char cpu_info[65]; |
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early_init_transmeta(c); |
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cpu_detect_cache_sizes(c); |
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/* Print CMS and CPU revision */ |
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max = cpuid_eax(0x80860000); |
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cpu_rev = 0; |
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if (max >= 0x80860001) { |
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cpuid(0x80860001, &dummy, &cpu_rev, &cpu_freq, &cpu_flags); |
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if (cpu_rev != 0x02000000) { |
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pr_info("CPU: Processor revision %u.%u.%u.%u, %u MHz\n", |
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(cpu_rev >> 24) & 0xff, |
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(cpu_rev >> 16) & 0xff, |
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(cpu_rev >> 8) & 0xff, |
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cpu_rev & 0xff, |
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cpu_freq); |
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} |
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} |
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if (max >= 0x80860002) { |
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cpuid(0x80860002, &new_cpu_rev, &cms_rev1, &cms_rev2, &dummy); |
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if (cpu_rev == 0x02000000) { |
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pr_info("CPU: Processor revision %08X, %u MHz\n", |
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new_cpu_rev, cpu_freq); |
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} |
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pr_info("CPU: Code Morphing Software revision %u.%u.%u-%u-%u\n", |
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(cms_rev1 >> 24) & 0xff, |
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(cms_rev1 >> 16) & 0xff, |
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(cms_rev1 >> 8) & 0xff, |
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cms_rev1 & 0xff, |
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cms_rev2); |
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} |
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if (max >= 0x80860006) { |
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cpuid(0x80860003, |
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(void *)&cpu_info[0], |
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(void *)&cpu_info[4], |
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(void *)&cpu_info[8], |
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(void *)&cpu_info[12]); |
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cpuid(0x80860004, |
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(void *)&cpu_info[16], |
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(void *)&cpu_info[20], |
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(void *)&cpu_info[24], |
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(void *)&cpu_info[28]); |
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cpuid(0x80860005, |
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(void *)&cpu_info[32], |
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(void *)&cpu_info[36], |
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(void *)&cpu_info[40], |
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(void *)&cpu_info[44]); |
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cpuid(0x80860006, |
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(void *)&cpu_info[48], |
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(void *)&cpu_info[52], |
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(void *)&cpu_info[56], |
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(void *)&cpu_info[60]); |
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cpu_info[64] = '\0'; |
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pr_info("CPU: %s\n", cpu_info); |
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} |
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/* Unhide possibly hidden capability flags */ |
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rdmsr(0x80860004, cap_mask, uk); |
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wrmsr(0x80860004, ~0, uk); |
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c->x86_capability[CPUID_1_EDX] = cpuid_edx(0x00000001); |
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wrmsr(0x80860004, cap_mask, uk); |
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/* All Transmeta CPUs have a constant TSC */ |
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set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC); |
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#ifdef CONFIG_SYSCTL |
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/* |
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* randomize_va_space slows us down enormously; |
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* it probably triggers retranslation of x86->native bytecode |
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*/ |
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randomize_va_space = 0; |
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#endif |
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} |
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static const struct cpu_dev transmeta_cpu_dev = { |
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.c_vendor = "Transmeta", |
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.c_ident = { "GenuineTMx86", "TransmetaCPU" }, |
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.c_early_init = early_init_transmeta, |
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.c_init = init_transmeta, |
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.c_x86_vendor = X86_VENDOR_TRANSMETA, |
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}; |
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cpu_dev_register(transmeta_cpu_dev);
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