summaryrefslogtreecommitdiff
path: root/arch/i386/kernel/cpu/transmeta.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/i386/kernel/cpu/transmeta.c')
-rw-r--r--arch/i386/kernel/cpu/transmeta.c107
1 files changed, 107 insertions, 0 deletions
diff --git a/arch/i386/kernel/cpu/transmeta.c b/arch/i386/kernel/cpu/transmeta.c
new file mode 100644
index 00000000000..f57e5ee9494
--- /dev/null
+++ b/arch/i386/kernel/cpu/transmeta.c
@@ -0,0 +1,107 @@
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <asm/processor.h>
+#include <asm/msr.h>
+#include "cpu.h"
+
+static void __init 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, cpu_flags, new_cpu_rev;
+ char cpu_info[65];
+
+ get_model_name(c); /* Same as AMD/Cyrix */
+ display_cacheinfo(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);
+
+ /* If we can run i686 user-space code, call us an i686 */
+#define USER686 (X86_FEATURE_TSC|X86_FEATURE_CX8|X86_FEATURE_CMOV)
+ if ( c->x86 == 5 && (c->x86_capability[0] & USER686) == USER686 )
+ c->x86 = 6;
+}
+
+static void transmeta_identify(struct cpuinfo_x86 * c)
+{
+ u32 xlvl;
+ generic_identify(c);
+
+ /* Transmeta-defined flags: level 0x80860001 */
+ xlvl = cpuid_eax(0x80860000);
+ if ( (xlvl & 0xffff0000) == 0x80860000 ) {
+ if ( xlvl >= 0x80860001 )
+ c->x86_capability[2] = cpuid_edx(0x80860001);
+ }
+}
+
+static struct cpu_dev transmeta_cpu_dev __initdata = {
+ .c_vendor = "Transmeta",
+ .c_ident = { "GenuineTMx86", "TransmetaCPU" },
+ .c_init = init_transmeta,
+ .c_identify = transmeta_identify,
+};
+
+int __init transmeta_init_cpu(void)
+{
+ cpu_devs[X86_VENDOR_TRANSMETA] = &transmeta_cpu_dev;
+ return 0;
+}
+
+//early_arch_initcall(transmeta_init_cpu);