Very Computer

CPUFreq i386 core for 2.5.32:
arch/i386/kernel/i386_ksyms.c   export cpu_khz
arch/i386/kernel/time.c         update various i386 values on frequency
                                changes
include/asm-i386/msr.h          add various MSR defines

diff -ruN linux-2531orig/arch/i386/kernel/i386_ksyms.c linux/arch/i386/kernel/i386_ksyms.c
--- linux-2531orig/arch/i386/kernel/i386_ksyms.c        Wed Aug 28 10:06:00 2002

 EXPORT_SYMBOL(drive_info);
 #endif

+extern unsigned long cpu_khz;
 extern unsigned long get_cmos_time(void);

 EXPORT_SYMBOL(pm_idle);
 EXPORT_SYMBOL(pm_power_off);
 EXPORT_SYMBOL(get_cmos_time);
+EXPORT_SYMBOL(cpu_khz);
 EXPORT_SYMBOL(apm_info);

 #ifdef CONFIG_DEBUG_IOVIRT
diff -ruN linux-2531orig/arch/i386/kernel/time.c linux/arch/i386/kernel/time.c
--- linux-2531orig/arch/i386/kernel/time.c      Wed Aug 28 10:06:00 2002

 #include <linux/smp.h>
 #include <linux/module.h>
 #include <linux/device.h>
+#include <linux/cpufreq.h>

 #include <asm/io.h>

 __initcall(time_init_driverfs);

+
+#ifdef CONFIG_CPU_FREQ
+
+static int
+time_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
+                      void *data)
+{
+       struct cpufreq_freqs *freq = data;
+       unsigned int i;
+
+       if (!cpu_has_tsc)
+               return 0;
+
+       switch (val) {
+       case CPUFREQ_PRECHANGE:
+               if (freq->cur < freq->new) {
+                       cpu_khz = cpufreq_scale(cpu_khz, freq->cur, freq->new);
+                       fast_gettimeoffset_quotient = cpufreq_scale(cpu_khz, freq->new, freq->cur);
+               }
+               for (i=0; i<NR_CPUS; i++)
+                       if ((freq->cpu == CPUFREQ_ALL_CPUS) || (freq->cpu == i))
+                               cpu_data[i].loops_per_jiffy = cpufreq_scale(loops_per_jiffy, freq->cur, freq->new);
+               break;
+
+       case CPUFREQ_POSTCHANGE:
+               if (freq->new < freq->cur) {
+                       cpu_khz = cpufreq_scale(cpu_khz, freq->cur, freq->new);
+                       fast_gettimeoffset_quotient = cpufreq_scale(cpu_khz, freq->new, freq->cur);
+               }
+               for (i=0; i<NR_CPUS; i++)
+                       if ((freq->cpu == CPUFREQ_ALL_CPUS) || (freq->cpu == i))
+                               cpu_data[i].loops_per_jiffy = cpufreq_scale(loops_per_jiffy, freq->cur, freq->new);
+               break;
+       }
+
+       return 0;
+}
+
+static struct notifier_block time_cpufreq_notifier_block = {
+       notifier_call:  time_cpufreq_notifier
+};
+#endif
+
+
 void __init time_init(void)
 {

                                "0" (eax), "1" (edx));
                                printk("Detected %lu.%03lu MHz processor.\n", cpu_khz / 1000, cpu_khz % 1000);
                        }
+#ifdef CONFIG_CPU_FREQ
+                       cpufreq_register_notifier(&time_cpufreq_notifier_block);
+#endif
+
                }
        }

diff -ruN linux-2531orig/include/asm-i386/msr.h linux/include/asm-i386/msr.h
--- linux-2531orig/include/asm-i386/msr.h       Wed Aug 28 10:01:02 2002

 #define MSR_K6_STAR                    0xC0000081
 #define MSR_K6_WHCR                    0xC0000082
 #define MSR_K6_UWCCR                   0xC0000085
+#define MSR_K6_EPMR                    0xC0000086
 #define MSR_K6_PSOR                    0xC0000087
 #define MSR_K6_PFIR                    0xC0000088

 #define MSR_K7_EVNTSEL0                        0xC0010000
 #define MSR_K7_PERFCTR0                        0xC0010004
 #define MSR_K7_HWCR                    0xC0010015
+#define MSR_K7_FID_VID_CTL             0xC0010041
+#define MSR_K7_VID_STATUS              0xC0010042

 /* Centaur-Hauls/IDT defined MSRs. */

 /* VIA Cyrix defined MSRs*/
 #define MSR_VIA_FCR                    0x1107
+#define MSR_VIA_LONGHAUL               0x110a
+#define MSR_VIA_BCR2                   0x1147

 #endif /* __ASM_MSR_H */