diff options
| author | Dominik Brodowski <linux@dominikbrodowski.net> | 2006-10-31 12:44:08 -0500 |
|---|---|---|
| committer | Dave Jones <davej@redhat.com> | 2006-11-06 19:17:40 -0500 |
| commit | 4e74663c5d7eefc1f953b9b0bdacab09917b4eac (patch) | |
| tree | f5a7e4f1ae4530ea4d355587b80c4ac85f555e95 /arch/i386/kernel/cpu/cpufreq/speedstep-lib.c | |
| parent | e08f5f5bb5dfaaa28d69ffe37eb774533297657f (diff) | |
[CPUFREQ] p4-clockmod: add more CPUs
Several more Intel CPUs are now capable using the p4-clockmod cpufreq
driver. As it is of limited use most of the time, print a big bold warning
if a better cpufreq driver might be available.
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Signed-off-by: Dave Jones <davej@redhat.com>
Diffstat (limited to 'arch/i386/kernel/cpu/cpufreq/speedstep-lib.c')
| -rw-r--r-- | arch/i386/kernel/cpu/cpufreq/speedstep-lib.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-lib.c b/arch/i386/kernel/cpu/cpufreq/speedstep-lib.c index 4f46cac155c..6623a564f6f 100644 --- a/arch/i386/kernel/cpu/cpufreq/speedstep-lib.c +++ b/arch/i386/kernel/cpu/cpufreq/speedstep-lib.c @@ -123,6 +123,36 @@ static unsigned int pentiumM_get_frequency(void) return (msr_tmp * 100 * 1000); } +static unsigned int pentium_core_get_frequency(void) +{ + u32 fsb = 0; + u32 msr_lo, msr_tmp; + + rdmsr(MSR_FSB_FREQ, msr_lo, msr_tmp); + /* see table B-2 of 24547212.pdf */ + switch (msr_lo & 0x07) { + case 5: + fsb = 400; + break; + case 1: + fsb = 533; + break; + case 3: + fsb = 667; + break; + default: + printk(KERN_ERR "PCORE - MSR_FSB_FREQ undefined value"); + } + + rdmsr(MSR_IA32_EBL_CR_POWERON, msr_lo, msr_tmp); + dprintk("PCORE - MSR_IA32_EBL_CR_POWERON: 0x%x 0x%x\n", msr_lo, msr_tmp); + + msr_tmp = (msr_lo >> 22) & 0x1f; + dprintk("bits 22-26 are 0x%x, speed is %u\n", msr_tmp, (msr_tmp * fsb * 1000)); + + return (msr_tmp * fsb * 1000); +} + static unsigned int pentium4_get_frequency(void) { @@ -174,6 +204,8 @@ static unsigned int pentium4_get_frequency(void) unsigned int speedstep_get_processor_frequency(unsigned int processor) { switch (processor) { + case SPEEDSTEP_PROCESSOR_PCORE: + return pentium_core_get_frequency(); case SPEEDSTEP_PROCESSOR_PM: return pentiumM_get_frequency(); case SPEEDSTEP_PROCESSOR_P4D: |