diff options
| author | Andi Kleen <ak@suse.de> | 2006-01-11 22:42:48 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-11 19:01:12 -0800 |
| commit | 152bf8c55d657898c40c8ed270630c0cf9d51f7d (patch) | |
| tree | 952dafe52a4dbe7f61cb01507fbeddc3d1925106 /arch/i386/kernel/cpu/cpufreq | |
| parent | 39b3a7910556005a7a0d042ecb7ff98bfa84ea57 (diff) | |
[PATCH] x86_64: Use X86_FEATURE_CONSTANT_TSC now to clean up Intel speedstep drivers
They previously tried to figure this out on their own.
Suggested by Venkatesh.
Cc: venkatesh.pallipadi@intel.com
Cc: davej@redhat.com
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386/kernel/cpu/cpufreq')
| -rw-r--r-- | arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c | 5 | ||||
| -rw-r--r-- | arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c | 5 | ||||
| -rw-r--r-- | arch/i386/kernel/cpu/cpufreq/speedstep-est-common.h | 25 |
3 files changed, 4 insertions, 31 deletions
diff --git a/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c index 871366b83b3f..7975e79d5fa4 100644 --- a/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c +++ b/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c @@ -40,8 +40,6 @@ #include <linux/acpi.h> #include <acpi/processor.h> -#include "speedstep-est-common.h" - #define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "acpi-cpufreq", msg) MODULE_AUTHOR("Paul Diefenbaugh, Dominik Brodowski"); @@ -367,6 +365,7 @@ acpi_cpufreq_cpu_init ( unsigned int cpu = policy->cpu; struct cpufreq_acpi_io *data; unsigned int result = 0; + struct cpuinfo_x86 *c = &cpu_data[policy->cpu]; union acpi_object arg0 = {ACPI_TYPE_BUFFER}; u32 arg0_buf[3]; @@ -390,7 +389,7 @@ acpi_cpufreq_cpu_init ( if (result) goto err_free; - if (is_const_loops_cpu(cpu)) { + if (cpu_has(c, X86_FEATURE_CONSTANT_TSC)) { acpi_cpufreq_driver.flags |= CPUFREQ_CONST_LOOPS; } diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c b/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c index edb9873e27e3..9a826cde4fd1 100644 --- a/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c +++ b/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c @@ -35,8 +35,6 @@ #include <asm/processor.h> #include <asm/cpufeature.h> -#include "speedstep-est-common.h" - #define PFX "speedstep-centrino: " #define MAINTAINER "Jeremy Fitzhardinge <jeremy@goop.org>" @@ -493,12 +491,13 @@ static int centrino_cpu_init(struct cpufreq_policy *policy) unsigned l, h; int ret; int i; + struct cpuinfo_x86 *c = &cpu_data[policy->cpu]; /* Only Intel makes Enhanced Speedstep-capable CPUs */ if (cpu->x86_vendor != X86_VENDOR_INTEL || !cpu_has(cpu, X86_FEATURE_EST)) return -ENODEV; - if (is_const_loops_cpu(policy->cpu)) { + if (cpu_has(c, X86_FEATURE_CONSTANT_TSC)) { centrino_driver.flags |= CPUFREQ_CONST_LOOPS; } diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-est-common.h b/arch/i386/kernel/cpu/cpufreq/speedstep-est-common.h deleted file mode 100644 index 5ce995c9d866..000000000000 --- a/arch/i386/kernel/cpu/cpufreq/speedstep-est-common.h +++ /dev/null @@ -1,25 +0,0 @@ -/* - * Routines common for drivers handling Enhanced Speedstep Technology - * Copyright (C) 2004 Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> - * - * Licensed under the terms of the GNU GPL License version 2 -- see - * COPYING for details. - */ - -static inline int is_const_loops_cpu(unsigned int cpu) -{ - struct cpuinfo_x86 *c = cpu_data + cpu; - - if (c->x86_vendor != X86_VENDOR_INTEL || !cpu_has(c, X86_FEATURE_EST)) - return 0; - - /* - * on P-4s, the TSC runs with constant frequency independent of cpu freq - * when we use EST - */ - if (c->x86 == 0xf) - return 1; - - return 0; -} - |