The CPU frequency table helpers can easily be modularized --
especially as they are not needed on all architectures, or for
all drivers.
arch/i386/Kconfig | 20 +++-
arch/sparc64/Kconfig | 7 +
drivers/cpufreq/Makefile | 2
drivers/cpufreq/freq_table.c | 201 +++++++++++++++++++++++++++++++++++++++++++
include/linux/cpufreq.h | 3
kernel/cpufreq.c | 188 ----------------------------------------
6 files changed, 228 insertions(+), 194 deletions(-)
diff -ruN linux-original/arch/i386/Kconfig linux/arch/i386/Kconfig
--- linux-original/arch/i386/Kconfig 2003-02-04 09:04:09.000000000 +0100
+++ linux/arch/i386/Kconfig 2003-02-04 08:56:37.000000000 +0100
@@ -983,9 +983,19 @@
If in doubt, say N.
+config CPU_FREQ_TABLE
+ tristate "CPU frequency table helpers"
+ depends on CPU_FREQ
+ default y
+ help
+ Many CPUFreq drivers use these helpers, so only say N here if
+ the CPUFreq driver of your choice doesn't need these helpers.
+
+ If in doubt, say Y.
+
config X86_ACPI_CPUFREQ
tristate "ACPI Processor P-States driver"
- depends on CPU_FREQ && ACPI_PROCESSOR
+ depends on CPU_FREQ && ACPI_PROCESSOR && CPU_FREQ_TABLE
help
This driver adds a CPUFreq driver which utilizes the ACPI
Processor Performance States.
@@ -996,7 +1006,7 @@
config X86_POWERNOW_K6
tristate "AMD Mobile K6-2/K6-3 PowerNow!"
- depends on CPU_FREQ
+ depends on CPU_FREQ && CPU_FREQ_TABLE
help
This adds the CPUFreq driver for mobile AMD K6-2+ and mobile
AMD K6-3+ processors.
@@ -1007,7 +1017,7 @@
config ELAN_CPUFREQ
tristate "AMD Elan"
- depends on CPU_FREQ && MELAN
+ depends on CPU_FREQ && MELAN && CPU_FREQ_TABLE
---help---
This adds the CPUFreq driver for AMD Elan SC400 and SC410
processors.
@@ -1034,7 +1044,7 @@
config X86_SPEEDSTEP
tristate "Intel Speedstep"
- depends on CPU_FREQ
+ depends on CPU_FREQ && CPU_FREQ_TABLE
help
This adds the CPUFreq driver for certain mobile Intel Pentium III
(Coppermine), all mobile Intel Pentium III-M (Tulatin) and all
@@ -1046,7 +1056,7 @@
config X86_P4_CLOCKMOD
tristate "Intel Pentium 4 clock modulation"
- depends on CPU_FREQ
+ depends on CPU_FREQ && CPU_FREQ_TABLE
help
This adds the CPUFreq driver for Intel Pentium 4 / XEON
processors.
diff -ruN linux-original/arch/sparc64/Kconfig linux/arch/sparc64/Kconfig
--- linux-original/arch/sparc64/Kconfig 2003-02-04 08:51:33.000000000 +0100
+++ linux/arch/sparc64/Kconfig 2003-02-04 08:56:37.000000000 +0100
@@ -162,9 +162,14 @@
If in doubt, say N.
+config CPU_FREQ_TABLE
+ tristate
+ default y
+
+
config US3_FREQ
tristate "UltraSPARC-III CPU Frequency driver"
- depends on CPU_FREQ
+ depends on CPU_FREQ && CPU_FREQ_TABLE
help
This adds the CPUFreq driver for UltraSPARC-III processors.
diff -ruN linux-original/drivers/Makefile linux/drivers/Makefile
--- linux-original/drivers/Makefile 2003-02-04 08:51:35.000000000 +0100
+++ linux/drivers/Makefile 2003-02-04 08:58:53.000000000 +0100
@@ -45,3 +45,4 @@
obj-$(CONFIG_ISDN_BOOL) += isdn/
obj-$(CONFIG_MCA) += mca/
obj-$(CONFIG_EISA) += eisa/
+obj-$(CONFIG_CPU_FREQ) += cpufreq/
diff -ruN linux-original/drivers/cpufreq/Makefile linux/drivers/cpufreq/Makefile
--- linux-original/drivers/cpufreq/Makefile 1970-01-01 01:00:00.000000000 +0100
+++ linux/drivers/cpufreq/Makefile 2003-02-04 08:58:14.000000000 +0100
@@ -0,0 +1,2 @@
+#CPUfreq governors and cross-arch helpers
+obj-$(CONFIG_CPU_FREQ_TABLE) += freq_table.o
diff -ruN linux-original/drivers/cpufreq/freq_table.c linux/drivers/cpufreq/freq_table.c
--- linux-original/drivers/cpufreq/freq_table.c 1970-01-01 01:00:00.000000000 +0100
+++ linux/drivers/cpufreq/freq_table.c 2003-02-04 08:56:38.000000000 +0100
@@ -0,0 +1,201 @@
+/*
+ * linux/drivers/cpufreq/freq_table.c
+ *
+ * Copyright (C) 2002 - 2003 Dominik Brodowski
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/cpufreq.h>
+
+/*********************************************************************
+ * FREQUENCY TABLE HELPERS *
+ *********************************************************************/
+
+int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
+ struct cpufreq_frequency_table *table)
+{
+ unsigned int min_freq = ~0;
+ unsigned int max_freq = 0;
+ unsigned int i = 0;
+
+ for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
+ unsigned int freq = table[i].frequency;
+ if (freq == CPUFREQ_ENTRY_INVALID)
+ continue;
+ if (freq < min_freq)
+ min_freq = freq;
+ if (freq > max_freq)
+ max_freq = freq;
+ }
+
+ policy->min = policy->cpuinfo.min_freq = min_freq;
+ policy->max = policy->cpuinfo.max_freq = max_freq;
+
+ if (policy->min == ~0)
+ return -EINVAL;
+ else
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cpufreq_frequency_table_cpuinfo);
+
+
+int cpufreq_frequency_table_verify(struct cpufreq_policy *policy,
+ struct cpufreq_frequency_table *table)
+{
+ unsigned int next_larger = ~0;
+ unsigned int i = 0;
+ unsigned int count = 0;
+
+ if (!cpu_online(policy->cpu))
+ return -EINVAL;
+
+ cpufreq_verify_within_limits(policy,
+ policy->cpuinfo.min_freq,
+ policy->cpuinfo.max_freq);
+
+ for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
+ unsigned int freq = table[i].frequency;
+ if (freq == CPUFREQ_ENTRY_INVALID)
+ continue;
+ if ((freq >= policy->min) && (freq <= policy->max))
+ count++;
+ else if ((next_larger > freq) && (freq > policy->max))
+ next_larger = freq;
+ }
+
+ if (!count)
+ policy->max = next_larger;
+
+ cpufreq_verify_within_limits(policy,
+ policy->cpuinfo.min_freq,
+ policy->cpuinfo.max_freq);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cpufreq_frequency_table_verify);
+
+
+int cpufreq_frequency_table_setpolicy(struct cpufreq_policy *policy,
+ struct cpufreq_frequency_table *table,
+ unsigned int *index)
+{
+ struct cpufreq_frequency_table optimal = { .index = ~0, };
+ unsigned int i;
+
+ switch (policy->policy) {
+ case CPUFREQ_POLICY_PERFORMANCE:
+ optimal.frequency = 0;
+ break;
+ case CPUFREQ_POLICY_POWERSAVE:
+ optimal.frequency = ~0;
+ break;
+ }
+
+ if (!cpu_online(policy->cpu))
+ return -EINVAL;
+
+ for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
+ unsigned int freq = table[i].frequency;
+ if (freq == CPUFREQ_ENTRY_INVALID)
+ continue;
+ if ((freq < policy->min) || (freq > policy->max))
+ continue;
+ switch(policy->policy) {
+ case CPUFREQ_POLICY_PERFORMANCE:
+ if (optimal.frequency <= freq) {
+ optimal.frequency = freq;
+ optimal.index = i;
+ }
+ break;
+ case CPUFREQ_POLICY_POWERSAVE:
+ if (optimal.frequency >= freq) {
+ optimal.frequency = freq;
+ optimal.index = i;
+ }
+ break;
+ }
+ }
+ if (optimal.index > i)
+ return -EINVAL;
+
+ *index = optimal.index;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cpufreq_frequency_table_setpolicy);
+
+int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
+ struct cpufreq_frequency_table *table,
+ unsigned int target_freq,
+ unsigned int relation,
+ unsigned int *index)
+{
+ struct cpufreq_frequency_table optimal = { .index = ~0, };
+ struct cpufreq_frequency_table suboptimal = { .index = ~0, };
+ unsigned int i;
+
+ switch (relation) {
+ case CPUFREQ_RELATION_H:
+ optimal.frequency = 0;
+ suboptimal.frequency = ~0;
+ break;
+ case CPUFREQ_RELATION_L:
+ optimal.frequency = ~0;
+ suboptimal.frequency = 0;
+ break;
+ }
+
+ if (!cpu_online(policy->cpu))
+ return -EINVAL;
+
+ for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
+ unsigned int freq = table[i].frequency;
+ if (freq == CPUFREQ_ENTRY_INVALID)
+ continue;
+ if ((freq < policy->min) || (freq > policy->max))
+ continue;
+ switch(relation) {
+ case CPUFREQ_RELATION_H:
+ if (freq <= target_freq) {
+ if (freq >= optimal.frequency) {
+ optimal.frequency = freq;
+ optimal.index = i;
+ }
+ } else {
+ if (freq <= suboptimal.frequency) {
+ suboptimal.frequency = freq;
+ suboptimal.index = i;
+ }
+ }
+ break;
+ case CPUFREQ_RELATION_L:
+ if (freq >= target_freq) {
+ if (freq <= optimal.frequency) {
+ optimal.frequency = freq;
+ optimal.index = i;
+ }
+ } else {
+ if (freq >= suboptimal.frequency) {
+ suboptimal.frequency = freq;
+ suboptimal.index = i;
+ }
+ }
+ break;
+ }
+ }
+ if (optimal.index > i) {
+ if (suboptimal.index > i)
+ return -EINVAL;
+ *index = suboptimal.index;
+ } else
+ *index = optimal.index;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cpufreq_frequency_table_target);
+
+MODULE_AUTHOR ("Dominik Brodowski <[email protected]>");
+MODULE_DESCRIPTION ("CPUfreq frequency table helpers");
+MODULE_LICENSE ("GPL");
diff -ruN linux-original/include/linux/cpufreq.h linux/include/linux/cpufreq.h
--- linux-original/include/linux/cpufreq.h 2003-02-04 09:03:57.000000000 +0100
+++ linux/include/linux/cpufreq.h 2003-02-04 08:56:38.000000000 +0100
@@ -297,6 +297,7 @@
#endif /* CONFIG_CPU_FREQ_24_API */
+#if defined(CONFIG_CPU_FREQ_TABLE) || defined(CONFIG_CPU_FREQ_TABLE_MODULE)
/*********************************************************************
* FREQUENCY TABLE HELPERS *
*********************************************************************/
@@ -326,4 +327,6 @@
unsigned int relation,
unsigned int *index);
+#endif /* CONFIG_CPU_FREQ_TABLE */
+
#endif /* _LINUX_CPUFREQ_H */
diff -ruN linux-original/kernel/cpufreq.c linux/kernel/cpufreq.c
--- linux-original/kernel/cpufreq.c 2003-02-04 09:03:57.000000000 +0100
+++ linux/kernel/cpufreq.c 2003-02-04 08:56:38.000000000 +0100
@@ -1582,191 +1582,3 @@
#else
#define cpufreq_restore() do {} while (0)
#endif /* CONFIG_PM */
-
-
-/*********************************************************************
- * FREQUENCY TABLE HELPERS *
- *********************************************************************/
-
-int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
- struct cpufreq_frequency_table *table)
-{
- unsigned int min_freq = ~0;
- unsigned int max_freq = 0;
- unsigned int i = 0;
-
- for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
- unsigned int freq = table[i].frequency;
- if (freq == CPUFREQ_ENTRY_INVALID)
- continue;
- if (freq < min_freq)
- min_freq = freq;
- if (freq > max_freq)
- max_freq = freq;
- }
-
- policy->min = policy->cpuinfo.min_freq = min_freq;
- policy->max = policy->cpuinfo.max_freq = max_freq;
-
- if (policy->min == ~0)
- return -EINVAL;
- else
- return 0;
-}
-EXPORT_SYMBOL_GPL(cpufreq_frequency_table_cpuinfo);
-
-
-int cpufreq_frequency_table_verify(struct cpufreq_policy *policy,
- struct cpufreq_frequency_table *table)
-{
- unsigned int next_larger = ~0;
- unsigned int i = 0;
- unsigned int count = 0;
-
- if (!cpu_online(policy->cpu))
- return -EINVAL;
-
- cpufreq_verify_within_limits(policy,
- policy->cpuinfo.min_freq,
- policy->cpuinfo.max_freq);
-
- for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
- unsigned int freq = table[i].frequency;
- if (freq == CPUFREQ_ENTRY_INVALID)
- continue;
- if ((freq >= policy->min) && (freq <= policy->max))
- count++;
- else if ((next_larger > freq) && (freq > policy->max))
- next_larger = freq;
- }
-
- if (!count)
- policy->max = next_larger;
-
- cpufreq_verify_within_limits(policy,
- policy->cpuinfo.min_freq,
- policy->cpuinfo.max_freq);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(cpufreq_frequency_table_verify);
-
-
-int cpufreq_frequency_table_setpolicy(struct cpufreq_policy *policy,
- struct cpufreq_frequency_table *table,
- unsigned int *index)
-{
- struct cpufreq_frequency_table optimal = { .index = ~0, };
- unsigned int i;
-
- switch (policy->policy) {
- case CPUFREQ_POLICY_PERFORMANCE:
- optimal.frequency = 0;
- break;
- case CPUFREQ_POLICY_POWERSAVE:
- optimal.frequency = ~0;
- break;
- }
-
- if (!cpu_online(policy->cpu))
- return -EINVAL;
-
- for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
- unsigned int freq = table[i].frequency;
- if (freq == CPUFREQ_ENTRY_INVALID)
- continue;
- if ((freq < policy->min) || (freq > policy->max))
- continue;
- switch(policy->policy) {
- case CPUFREQ_POLICY_PERFORMANCE:
- if (optimal.frequency <= freq) {
- optimal.frequency = freq;
- optimal.index = i;
- }
- break;
- case CPUFREQ_POLICY_POWERSAVE:
- if (optimal.frequency >= freq) {
- optimal.frequency = freq;
- optimal.index = i;
- }
- break;
- }
- }
- if (optimal.index > i)
- return -EINVAL;
-
- *index = optimal.index;
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(cpufreq_frequency_table_setpolicy);
-
-int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
- struct cpufreq_frequency_table *table,
- unsigned int target_freq,
- unsigned int relation,
- unsigned int *index)
-{
- struct cpufreq_frequency_table optimal = { .index = ~0, };
- struct cpufreq_frequency_table suboptimal = { .index = ~0, };
- unsigned int i;
-
- switch (relation) {
- case CPUFREQ_RELATION_H:
- optimal.frequency = 0;
- suboptimal.frequency = ~0;
- break;
- case CPUFREQ_RELATION_L:
- optimal.frequency = ~0;
- suboptimal.frequency = 0;
- break;
- }
-
- if (!cpu_online(policy->cpu))
- return -EINVAL;
-
- for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
- unsigned int freq = table[i].frequency;
- if (freq == CPUFREQ_ENTRY_INVALID)
- continue;
- if ((freq < policy->min) || (freq > policy->max))
- continue;
- switch(relation) {
- case CPUFREQ_RELATION_H:
- if (freq <= target_freq) {
- if (freq >= optimal.frequency) {
- optimal.frequency = freq;
- optimal.index = i;
- }
- } else {
- if (freq <= suboptimal.frequency) {
- suboptimal.frequency = freq;
- suboptimal.index = i;
- }
- }
- break;
- case CPUFREQ_RELATION_L:
- if (freq >= target_freq) {
- if (freq <= optimal.frequency) {
- optimal.frequency = freq;
- optimal.index = i;
- }
- } else {
- if (freq >= suboptimal.frequency) {
- suboptimal.frequency = freq;
- suboptimal.index = i;
- }
- }
- break;
- }
- }
- if (optimal.index > i) {
- if (suboptimal.index > i)
- return -EINVAL;
- *index = suboptimal.index;
- } else
- *index = optimal.index;
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(cpufreq_frequency_table_target);
On Thu, Feb 13, 2003 at 10:11:31AM +0100, Dominik Brodowski wrote:
> The CPU frequency table helpers can easily be modularized --
> especially as they are not needed on all architectures, or for
> all drivers.
As most of the x86 drivers have been converted now, it looks like
it'd make more sense to conditionalise this on architecture, and
move the remaining x86 drivers over to the helpers (longrun/longhaul).
It just strikes me as silly that we have a config option that when
disabled could end up showing no chip drivers when the conversion
is complete.
Dave
--
| Dave Jones. http://www.codemonkey.org.uk
| SuSE Labs
On Thu, Feb 13, 2003 at 09:39:51AM +0000, Dave Jones wrote:
> On Thu, Feb 13, 2003 at 10:11:31AM +0100, Dominik Brodowski wrote:
> > The CPU frequency table helpers can easily be modularized --
> > especially as they are not needed on all architectures, or for
> > all drivers.
>
> As most of the x86 drivers have been converted now, it looks like
> it'd make more sense to conditionalise this on architecture, and
> move the remaining x86 drivers over to the helpers (longrun/longhaul).
Longhaul yes, Longrun no. On longrun you can't set the speed to a specific
frequency[*], only to a _frequency range_. So the frequency table helpers
aren't needed there. Also, for gx-suspmod, which allows really fine-grained
setting of frequencies, the frequency table helpers don't make sense.
> It just strikes me as silly that we have a config option that when
> disabled could end up showing no chip drivers when the conversion
> is complete.
So, even when the conversion is complete, there are two drivers which can be
compiled. Additionally, some users (or distros!) might prefer modularizing
this.
Dominik
[*] you can set policy->max = policy->min, but that really doesn't make
sense on longrun.
Hi,
On Thu, 13 Feb 2003, Dominik Brodowski wrote:
> +config CPU_FREQ_TABLE
> + tristate "CPU frequency table helpers"
> + depends on CPU_FREQ
> + default y
> + help
> + Many CPUFreq drivers use these helpers, so only say N here if
> + the CPUFreq driver of your choice doesn't need these helpers.
> +
> + If in doubt, say Y.
> +
> config X86_ACPI_CPUFREQ
> tristate "ACPI Processor P-States driver"
> - depends on CPU_FREQ && ACPI_PROCESSOR
> + depends on CPU_FREQ && ACPI_PROCESSOR && CPU_FREQ_TABLE
> help
> This driver adds a CPUFreq driver which utilizes the ACPI
> Processor Performance States.
If CPU_FREQ_TABLE itself depends on CPU_FREQ, then X86_ACPI_CPUFREQ
automatically depends on CPU_FREQ too, so you can remove CPU_FREQ from the
dependency list.
You can also put X86_ACPI_CPUFREQ and all following options, which depend
on CPU_FREQ_TABLE, within an "if CPU_FREQ_TABLE" ... "endif" block.
bye, Roman
The CPU frequency table helpers can easily be modularized --
especially as they are not needed on all architectures, or for
all drivers (even on x86 -- see longrun and gx-suspmod). Thanks to Roman
Zippel and Dave Jones for their feedback.
arch/i386/Kconfig | 20 +++-
arch/sparc64/Kconfig | 7 +
drivers/cpufreq/Makefile | 2
drivers/cpufreq/freq_table.c | 201 +++++++++++++++++++++++++++++++++++++++++++
include/linux/cpufreq.h | 3
kernel/cpufreq.c | 188 ----------------------------------------
6 files changed, 228 insertions(+), 194 deletions(-)
diff -ruN linux-original/arch/i386/Kconfig linux/arch/i386/Kconfig
--- linux-original/arch/i386/Kconfig 2003-02-04 09:04:09.000000000 +0100
+++ linux/arch/i386/Kconfig 2003-02-04 08:56:37.000000000 +0100
@@ -983,9 +983,19 @@
If in doubt, say N.
+config CPU_FREQ_TABLE
+ tristate "CPU frequency table helpers"
+ depends on CPU_FREQ
+ default y
+ help
+ Many CPUFreq drivers use these helpers, so only say N here if
+ the CPUFreq driver of your choice doesn't need these helpers.
+
+ If in doubt, say Y.
+
config X86_ACPI_CPUFREQ
tristate "ACPI Processor P-States driver"
- depends on CPU_FREQ && ACPI_PROCESSOR
+ depends on CPU_FREQ_TABLE && ACPI_PROCESSOR
help
This driver adds a CPUFreq driver which utilizes the ACPI
Processor Performance States.
@@ -996,7 +1006,7 @@
config X86_POWERNOW_K6
tristate "AMD Mobile K6-2/K6-3 PowerNow!"
- depends on CPU_FREQ
+ depends on CPU_FREQ_TABLE
help
This adds the CPUFreq driver for mobile AMD K6-2+ and mobile
AMD K6-3+ processors.
@@ -1007,7 +1017,7 @@
config ELAN_CPUFREQ
tristate "AMD Elan"
- depends on CPU_FREQ && MELAN
+ depends on CPU_FREQ_TABLE && MELAN
---help---
This adds the CPUFreq driver for AMD Elan SC400 and SC410
processors.
@@ -1034,7 +1044,7 @@
config X86_SPEEDSTEP
tristate "Intel Speedstep"
- depends on CPU_FREQ
+ depends on CPU_FREQ_TABLE
help
This adds the CPUFreq driver for certain mobile Intel Pentium III
(Coppermine), all mobile Intel Pentium III-M (Tulatin) and all
@@ -1046,7 +1056,7 @@
config X86_P4_CLOCKMOD
tristate "Intel Pentium 4 clock modulation"
- depends on CPU_FREQ
+ depends on CPU_FREQ_TABLE
help
This adds the CPUFreq driver for Intel Pentium 4 / XEON
processors.
diff -ruN linux-original/arch/sparc64/Kconfig linux/arch/sparc64/Kconfig
--- linux-original/arch/sparc64/Kconfig 2003-02-04 08:51:33.000000000 +0100
+++ linux/arch/sparc64/Kconfig 2003-02-04 08:56:37.000000000 +0100
@@ -162,9 +162,14 @@
If in doubt, say N.
+config CPU_FREQ_TABLE
+ tristate
+ default y
+
+
config US3_FREQ
tristate "UltraSPARC-III CPU Frequency driver"
- depends on CPU_FREQ
+ depends on CPU_FREQ_TABLE
help
This adds the CPUFreq driver for UltraSPARC-III processors.
diff -ruN linux-original/drivers/Makefile linux/drivers/Makefile
--- linux-original/drivers/Makefile 2003-02-04 08:51:35.000000000 +0100
+++ linux/drivers/Makefile 2003-02-04 08:58:53.000000000 +0100
@@ -45,3 +45,4 @@
obj-$(CONFIG_ISDN_BOOL) += isdn/
obj-$(CONFIG_MCA) += mca/
obj-$(CONFIG_EISA) += eisa/
+obj-$(CONFIG_CPU_FREQ) += cpufreq/
diff -ruN linux-original/drivers/cpufreq/Makefile linux/drivers/cpufreq/Makefile
--- linux-original/drivers/cpufreq/Makefile 1970-01-01 01:00:00.000000000 +0100
+++ linux/drivers/cpufreq/Makefile 2003-02-04 08:58:14.000000000 +0100
@@ -0,0 +1,2 @@
+#CPUfreq governors and cross-arch helpers
+obj-$(CONFIG_CPU_FREQ_TABLE) += freq_table.o
diff -ruN linux-original/drivers/cpufreq/freq_table.c linux/drivers/cpufreq/freq_table.c
--- linux-original/drivers/cpufreq/freq_table.c 1970-01-01 01:00:00.000000000 +0100
+++ linux/drivers/cpufreq/freq_table.c 2003-02-04 08:56:38.000000000 +0100
@@ -0,0 +1,201 @@
+/*
+ * linux/drivers/cpufreq/freq_table.c
+ *
+ * Copyright (C) 2002 - 2003 Dominik Brodowski
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/cpufreq.h>
+
+/*********************************************************************
+ * FREQUENCY TABLE HELPERS *
+ *********************************************************************/
+
+int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
+ struct cpufreq_frequency_table *table)
+{
+ unsigned int min_freq = ~0;
+ unsigned int max_freq = 0;
+ unsigned int i = 0;
+
+ for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
+ unsigned int freq = table[i].frequency;
+ if (freq == CPUFREQ_ENTRY_INVALID)
+ continue;
+ if (freq < min_freq)
+ min_freq = freq;
+ if (freq > max_freq)
+ max_freq = freq;
+ }
+
+ policy->min = policy->cpuinfo.min_freq = min_freq;
+ policy->max = policy->cpuinfo.max_freq = max_freq;
+
+ if (policy->min == ~0)
+ return -EINVAL;
+ else
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cpufreq_frequency_table_cpuinfo);
+
+
+int cpufreq_frequency_table_verify(struct cpufreq_policy *policy,
+ struct cpufreq_frequency_table *table)
+{
+ unsigned int next_larger = ~0;
+ unsigned int i = 0;
+ unsigned int count = 0;
+
+ if (!cpu_online(policy->cpu))
+ return -EINVAL;
+
+ cpufreq_verify_within_limits(policy,
+ policy->cpuinfo.min_freq,
+ policy->cpuinfo.max_freq);
+
+ for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
+ unsigned int freq = table[i].frequency;
+ if (freq == CPUFREQ_ENTRY_INVALID)
+ continue;
+ if ((freq >= policy->min) && (freq <= policy->max))
+ count++;
+ else if ((next_larger > freq) && (freq > policy->max))
+ next_larger = freq;
+ }
+
+ if (!count)
+ policy->max = next_larger;
+
+ cpufreq_verify_within_limits(policy,
+ policy->cpuinfo.min_freq,
+ policy->cpuinfo.max_freq);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cpufreq_frequency_table_verify);
+
+
+int cpufreq_frequency_table_setpolicy(struct cpufreq_policy *policy,
+ struct cpufreq_frequency_table *table,
+ unsigned int *index)
+{
+ struct cpufreq_frequency_table optimal = { .index = ~0, };
+ unsigned int i;
+
+ switch (policy->policy) {
+ case CPUFREQ_POLICY_PERFORMANCE:
+ optimal.frequency = 0;
+ break;
+ case CPUFREQ_POLICY_POWERSAVE:
+ optimal.frequency = ~0;
+ break;
+ }
+
+ if (!cpu_online(policy->cpu))
+ return -EINVAL;
+
+ for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
+ unsigned int freq = table[i].frequency;
+ if (freq == CPUFREQ_ENTRY_INVALID)
+ continue;
+ if ((freq < policy->min) || (freq > policy->max))
+ continue;
+ switch(policy->policy) {
+ case CPUFREQ_POLICY_PERFORMANCE:
+ if (optimal.frequency <= freq) {
+ optimal.frequency = freq;
+ optimal.index = i;
+ }
+ break;
+ case CPUFREQ_POLICY_POWERSAVE:
+ if (optimal.frequency >= freq) {
+ optimal.frequency = freq;
+ optimal.index = i;
+ }
+ break;
+ }
+ }
+ if (optimal.index > i)
+ return -EINVAL;
+
+ *index = optimal.index;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cpufreq_frequency_table_setpolicy);
+
+int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
+ struct cpufreq_frequency_table *table,
+ unsigned int target_freq,
+ unsigned int relation,
+ unsigned int *index)
+{
+ struct cpufreq_frequency_table optimal = { .index = ~0, };
+ struct cpufreq_frequency_table suboptimal = { .index = ~0, };
+ unsigned int i;
+
+ switch (relation) {
+ case CPUFREQ_RELATION_H:
+ optimal.frequency = 0;
+ suboptimal.frequency = ~0;
+ break;
+ case CPUFREQ_RELATION_L:
+ optimal.frequency = ~0;
+ suboptimal.frequency = 0;
+ break;
+ }
+
+ if (!cpu_online(policy->cpu))
+ return -EINVAL;
+
+ for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
+ unsigned int freq = table[i].frequency;
+ if (freq == CPUFREQ_ENTRY_INVALID)
+ continue;
+ if ((freq < policy->min) || (freq > policy->max))
+ continue;
+ switch(relation) {
+ case CPUFREQ_RELATION_H:
+ if (freq <= target_freq) {
+ if (freq >= optimal.frequency) {
+ optimal.frequency = freq;
+ optimal.index = i;
+ }
+ } else {
+ if (freq <= suboptimal.frequency) {
+ suboptimal.frequency = freq;
+ suboptimal.index = i;
+ }
+ }
+ break;
+ case CPUFREQ_RELATION_L:
+ if (freq >= target_freq) {
+ if (freq <= optimal.frequency) {
+ optimal.frequency = freq;
+ optimal.index = i;
+ }
+ } else {
+ if (freq >= suboptimal.frequency) {
+ suboptimal.frequency = freq;
+ suboptimal.index = i;
+ }
+ }
+ break;
+ }
+ }
+ if (optimal.index > i) {
+ if (suboptimal.index > i)
+ return -EINVAL;
+ *index = suboptimal.index;
+ } else
+ *index = optimal.index;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cpufreq_frequency_table_target);
+
+MODULE_AUTHOR ("Dominik Brodowski <[email protected]>");
+MODULE_DESCRIPTION ("CPUfreq frequency table helpers");
+MODULE_LICENSE ("GPL");
diff -ruN linux-original/include/linux/cpufreq.h linux/include/linux/cpufreq.h
--- linux-original/include/linux/cpufreq.h 2003-02-04 09:03:57.000000000 +0100
+++ linux/include/linux/cpufreq.h 2003-02-04 08:56:38.000000000 +0100
@@ -297,6 +297,7 @@
#endif /* CONFIG_CPU_FREQ_24_API */
+#if defined(CONFIG_CPU_FREQ_TABLE) || defined(CONFIG_CPU_FREQ_TABLE_MODULE)
/*********************************************************************
* FREQUENCY TABLE HELPERS *
*********************************************************************/
@@ -326,4 +327,6 @@
unsigned int relation,
unsigned int *index);
+#endif /* CONFIG_CPU_FREQ_TABLE */
+
#endif /* _LINUX_CPUFREQ_H */
diff -ruN linux-original/kernel/cpufreq.c linux/kernel/cpufreq.c
--- linux-original/kernel/cpufreq.c 2003-02-04 09:03:57.000000000 +0100
+++ linux/kernel/cpufreq.c 2003-02-04 08:56:38.000000000 +0100
@@ -1582,191 +1582,3 @@
#else
#define cpufreq_restore() do {} while (0)
#endif /* CONFIG_PM */
-
-
-/*********************************************************************
- * FREQUENCY TABLE HELPERS *
- *********************************************************************/
-
-int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
- struct cpufreq_frequency_table *table)
-{
- unsigned int min_freq = ~0;
- unsigned int max_freq = 0;
- unsigned int i = 0;
-
- for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
- unsigned int freq = table[i].frequency;
- if (freq == CPUFREQ_ENTRY_INVALID)
- continue;
- if (freq < min_freq)
- min_freq = freq;
- if (freq > max_freq)
- max_freq = freq;
- }
-
- policy->min = policy->cpuinfo.min_freq = min_freq;
- policy->max = policy->cpuinfo.max_freq = max_freq;
-
- if (policy->min == ~0)
- return -EINVAL;
- else
- return 0;
-}
-EXPORT_SYMBOL_GPL(cpufreq_frequency_table_cpuinfo);
-
-
-int cpufreq_frequency_table_verify(struct cpufreq_policy *policy,
- struct cpufreq_frequency_table *table)
-{
- unsigned int next_larger = ~0;
- unsigned int i = 0;
- unsigned int count = 0;
-
- if (!cpu_online(policy->cpu))
- return -EINVAL;
-
- cpufreq_verify_within_limits(policy,
- policy->cpuinfo.min_freq,
- policy->cpuinfo.max_freq);
-
- for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
- unsigned int freq = table[i].frequency;
- if (freq == CPUFREQ_ENTRY_INVALID)
- continue;
- if ((freq >= policy->min) && (freq <= policy->max))
- count++;
- else if ((next_larger > freq) && (freq > policy->max))
- next_larger = freq;
- }
-
- if (!count)
- policy->max = next_larger;
-
- cpufreq_verify_within_limits(policy,
- policy->cpuinfo.min_freq,
- policy->cpuinfo.max_freq);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(cpufreq_frequency_table_verify);
-
-
-int cpufreq_frequency_table_setpolicy(struct cpufreq_policy *policy,
- struct cpufreq_frequency_table *table,
- unsigned int *index)
-{
- struct cpufreq_frequency_table optimal = { .index = ~0, };
- unsigned int i;
-
- switch (policy->policy) {
- case CPUFREQ_POLICY_PERFORMANCE:
- optimal.frequency = 0;
- break;
- case CPUFREQ_POLICY_POWERSAVE:
- optimal.frequency = ~0;
- break;
- }
-
- if (!cpu_online(policy->cpu))
- return -EINVAL;
-
- for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
- unsigned int freq = table[i].frequency;
- if (freq == CPUFREQ_ENTRY_INVALID)
- continue;
- if ((freq < policy->min) || (freq > policy->max))
- continue;
- switch(policy->policy) {
- case CPUFREQ_POLICY_PERFORMANCE:
- if (optimal.frequency <= freq) {
- optimal.frequency = freq;
- optimal.index = i;
- }
- break;
- case CPUFREQ_POLICY_POWERSAVE:
- if (optimal.frequency >= freq) {
- optimal.frequency = freq;
- optimal.index = i;
- }
- break;
- }
- }
- if (optimal.index > i)
- return -EINVAL;
-
- *index = optimal.index;
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(cpufreq_frequency_table_setpolicy);
-
-int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
- struct cpufreq_frequency_table *table,
- unsigned int target_freq,
- unsigned int relation,
- unsigned int *index)
-{
- struct cpufreq_frequency_table optimal = { .index = ~0, };
- struct cpufreq_frequency_table suboptimal = { .index = ~0, };
- unsigned int i;
-
- switch (relation) {
- case CPUFREQ_RELATION_H:
- optimal.frequency = 0;
- suboptimal.frequency = ~0;
- break;
- case CPUFREQ_RELATION_L:
- optimal.frequency = ~0;
- suboptimal.frequency = 0;
- break;
- }
-
- if (!cpu_online(policy->cpu))
- return -EINVAL;
-
- for (i=0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
- unsigned int freq = table[i].frequency;
- if (freq == CPUFREQ_ENTRY_INVALID)
- continue;
- if ((freq < policy->min) || (freq > policy->max))
- continue;
- switch(relation) {
- case CPUFREQ_RELATION_H:
- if (freq <= target_freq) {
- if (freq >= optimal.frequency) {
- optimal.frequency = freq;
- optimal.index = i;
- }
- } else {
- if (freq <= suboptimal.frequency) {
- suboptimal.frequency = freq;
- suboptimal.index = i;
- }
- }
- break;
- case CPUFREQ_RELATION_L:
- if (freq >= target_freq) {
- if (freq <= optimal.frequency) {
- optimal.frequency = freq;
- optimal.index = i;
- }
- } else {
- if (freq >= suboptimal.frequency) {
- suboptimal.frequency = freq;
- suboptimal.index = i;
- }
- }
- break;
- }
- }
- if (optimal.index > i) {
- if (suboptimal.index > i)
- return -EINVAL;
- *index = suboptimal.index;
- } else
- *index = optimal.index;
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(cpufreq_frequency_table_target);
Dominic,
this broke ACPI.
In file included from drivers/acpi/processor.c:49:
include/acpi/processor.h:78: field `freq_table' has incomplete type
AGAIN.
For about the 15th time.
You guys need to talk more. A LOT more. Or y ou need to start checking who
is actually _using_ the frequency code, and when you make changes to the
interfaces you need to _update_ the users, instead of just causing kernel
compiles to fail every frigging time you make a change.
Linus
On Sat, Feb 15, 2003 at 12:53:56PM -0800, Linus Torvalds wrote:
>
> Dominic,
> this broke ACPI.
>
> In file included from drivers/acpi/processor.c:49:
> include/acpi/processor.h:78: field `freq_table' has incomplete type
>
> AGAIN.
>
> For about the 15th time.
>
> You guys need to talk more. A LOT more. Or y ou need to start checking who
> is actually _using_ the frequency code, and when you make changes to the
> interfaces you need to _update_ the users, instead of just causing kernel
> compiles to fail every frigging time you make a change.
>
> Linus
Linus,
here's the compile fix for this breakage which only appears if
CONFIG_ACPI && !(CONFIG_CPU_FREQ_TABLE || CONFIG_CPU_FREQ_TABLE_MODULE)
Unfortunately, I forgot to test-compile this combination. Sorry about
that.
Dominik
diff -u linux-original/include/linux/cpufreq.h linux/include/linux/cpufreq.h
--- linux-original/include/linux/cpufreq.h 2003-02-15 23:35:14.000000000 +0100
+++ linux/include/linux/cpufreq.h 2003-02-15 23:28:32.000000000 +0100
@@ -299,7 +299,7 @@
#endif /* CONFIG_CPU_FREQ_24_API */
-#if defined(CONFIG_CPU_FREQ_TABLE) || defined(CONFIG_CPU_FREQ_TABLE_MODULE)
+
/*********************************************************************
* FREQUENCY TABLE HELPERS *
*********************************************************************/
@@ -313,6 +313,7 @@
* order */
};
+#if defined(CONFIG_CPU_FREQ_TABLE) || defined(CONFIG_CPU_FREQ_TABLE_MODULE)
int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
struct cpufreq_frequency_table *table);