diff options
Diffstat (limited to 'kernel/arch/x86/kernel/cpu/transmeta.c')
-rw-r--r-- | kernel/arch/x86/kernel/cpu/transmeta.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/kernel/arch/x86/kernel/cpu/transmeta.c b/kernel/arch/x86/kernel/cpu/transmeta.c new file mode 100644 index 000000000..3fa0e5ad8 --- /dev/null +++ b/kernel/arch/x86/kernel/cpu/transmeta.c @@ -0,0 +1,108 @@ +#include <linux/kernel.h> +#include <linux/mm.h> +#include <asm/processor.h> +#include <asm/msr.h> +#include "cpu.h" + +static void early_init_transmeta(struct cpuinfo_x86 *c) +{ + u32 xlvl; + + /* Transmeta-defined flags: level 0x80860001 */ + xlvl = cpuid_eax(0x80860000); + if ((xlvl & 0xffff0000) == 0x80860000) { + if (xlvl >= 0x80860001) + c->x86_capability[2] = cpuid_edx(0x80860001); + } +} + +static void init_transmeta(struct cpuinfo_x86 *c) +{ + unsigned int cap_mask, uk, max, dummy; + unsigned int cms_rev1, cms_rev2; + unsigned int cpu_rev, cpu_freq = 0, cpu_flags, new_cpu_rev; + char cpu_info[65]; + + early_init_transmeta(c); + + cpu_detect_cache_sizes(c); + + /* Print CMS and CPU revision */ + max = cpuid_eax(0x80860000); + cpu_rev = 0; + if (max >= 0x80860001) { + cpuid(0x80860001, &dummy, &cpu_rev, &cpu_freq, &cpu_flags); + if (cpu_rev != 0x02000000) { + printk(KERN_INFO "CPU: Processor revision %u.%u.%u.%u, %u MHz\n", + (cpu_rev >> 24) & 0xff, + (cpu_rev >> 16) & 0xff, + (cpu_rev >> 8) & 0xff, + cpu_rev & 0xff, + cpu_freq); + } + } + if (max >= 0x80860002) { + cpuid(0x80860002, &new_cpu_rev, &cms_rev1, &cms_rev2, &dummy); + if (cpu_rev == 0x02000000) { + printk(KERN_INFO "CPU: Processor revision %08X, %u MHz\n", + new_cpu_rev, cpu_freq); + } + printk(KERN_INFO "CPU: Code Morphing Software revision %u.%u.%u-%u-%u\n", + (cms_rev1 >> 24) & 0xff, + (cms_rev1 >> 16) & 0xff, + (cms_rev1 >> 8) & 0xff, + cms_rev1 & 0xff, + cms_rev2); + } + if (max >= 0x80860006) { + cpuid(0x80860003, + (void *)&cpu_info[0], + (void *)&cpu_info[4], + (void *)&cpu_info[8], + (void *)&cpu_info[12]); + cpuid(0x80860004, + (void *)&cpu_info[16], + (void *)&cpu_info[20], + (void *)&cpu_info[24], + (void *)&cpu_info[28]); + cpuid(0x80860005, + (void *)&cpu_info[32], + (void *)&cpu_info[36], + (void *)&cpu_info[40], + (void *)&cpu_info[44]); + cpuid(0x80860006, + (void *)&cpu_info[48], + (void *)&cpu_info[52], + (void *)&cpu_info[56], + (void *)&cpu_info[60]); + cpu_info[64] = '\0'; + printk(KERN_INFO "CPU: %s\n", cpu_info); + } + + /* Unhide possibly hidden capability flags */ + rdmsr(0x80860004, cap_mask, uk); + wrmsr(0x80860004, ~0, uk); + c->x86_capability[0] = cpuid_edx(0x00000001); + wrmsr(0x80860004, cap_mask, uk); + + /* All Transmeta CPUs have a constant TSC */ + set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC); + +#ifdef CONFIG_SYSCTL + /* + * randomize_va_space slows us down enormously; + * it probably triggers retranslation of x86->native bytecode + */ + randomize_va_space = 0; +#endif +} + +static const struct cpu_dev transmeta_cpu_dev = { + .c_vendor = "Transmeta", + .c_ident = { "GenuineTMx86", "TransmetaCPU" }, + .c_early_init = early_init_transmeta, + .c_init = init_transmeta, + .c_x86_vendor = X86_VENDOR_TRANSMETA, +}; + +cpu_dev_register(transmeta_cpu_dev); |