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package cpufreq;
use common;
use detect_devices;
my %vendor_ids = (
GenuineIntel => "Intel",
AuthenticAMD => "AMD",
CyrixInstead => "Cyrix",
"Geode by NSC" => "NSC",
TransmetaCPU => "Transmeta",
GenuineTMx86 => "Transmeta",
CentaurHauls => "Centaur",
);
sub get_vendor {
my ($cpu) = @_;
$vendor_ids{$cpu->{vendor_id}};
}
sub has_flag {
my ($cpu, $flag) = @_;
$cpu->{flags} =~ /\b$flag\b/;
}
my @cpus;
sub get_cpus() {
@cpus ? @cpus : @cpus = detect_devices::getCPUs();
}
my @pci;
sub pci_probe() {
@pci ? @pci : @pci = detect_devices::pci_probe();
}
sub find_pci_device {
my (@devices) = @_;
any { my $dev = $_; any { $_->{vendor} == $dev->[0] && $_->{id} == $dev->[1] } pci_probe() } @devices;
}
sub probe_acpi_cpufreq() {
any {
get_vendor($_) eq "Intel" &&
$_->{'cpu family'} == 6 &&
(
has_flag($_, 'est') ||
$_->{model} == 11
);
} get_cpus();
}
# see cpuid.c (from cpuid package) for a list of family/models
sub probe_centrino() {
any {
get_vendor($_) eq "Intel" &&
has_flag($_, 'est') && (
($_->{'cpu family'} == 6 && $_->{model} == 9 && $_->{stepping} == 5 &&
$_->{'model name'} =~ /^Intel\(R\) Pentium\(R\) M processor ( 900|1[0-7]00)MHz$/) ||
($_->{'cpu family'} == 6 && $_->{model} == 13 && member($_->{stepping}, 1, 2, 6)) ||
($_->{'cpu family'} == 15 && $_->{model} == 3 && $_->{stepping} == 4) ||
($_->{'cpu family'} == 15 && $_->{model} == 4 && $_->{stepping} == 1)
);
} get_cpus();
}
sub probe_ich() { find_pci_device([ 0x8086, 0x244c ], [ 0x8086, 0x24cc ], [ 0x8086, 0x248c ]) }
sub probe_smi() { find_pci_device([ 0x8086, 0x7190 ]) }
sub probe_nforce2() { find_pci_device([ 0x10de, 0x01e0 ]) }
sub probe_gsx() {
(any { member(get_vendor($_), "Cyrix", "NSC") } get_cpus()) &&
find_pci_device([ 0x1078, 0x0100 ], [ 0x1078, 0x0002 ], [ 0x1078, 0x0000 ]);
}
sub probe_p4() {
any {
get_vendor($_) eq "Intel" && (
$_->{'cpu family'} == 15 ||
($_->{'cpu family'} == 6 && !has_flag($_, 'est') && member($_->{model}, 9, 13, 14, 15))
);
} get_cpus();
}
sub probe_powernow_k6() {
any {
get_vendor($_) eq "AMD" &&
$_->{'cpu family'} == 5 &&
member($_->{model}, 12, 13);
} get_cpus();
}
sub probe_powernow_k7() {
any {
get_vendor($_) eq "AMD" &&
$_->{'cpu family'} == 6;
} get_cpus();
}
sub probe_powernow_k8() {
any {
get_vendor($_) eq "AMD" && (
($_->{'cpu family'} == 15 && ($_->{'power management'} =~ /\bfid\b/ || has_flag($_, 'fid'))) # frequency ID control)
||
$_->{'cpu family'} == 16 && ($_->{'power management'} =~ /\bhwpstate\b/) # support for Athlon/Phenom II processors (#58477))
);
} get_cpus();
}
sub probe_longhaul() {
any {
get_vendor($_) eq "Centaur" &&
$_->{'cpu family'} == 6 &&
member($_->{model}, 6, 7, 8, 9);
} get_cpus();
}
sub probe_e_powersaver() {
any {
get_vendor($_) eq "Centaur" &&
has_flag($_, 'est') &&
$_->{'cpu family'} == 6 &&
member($_->{model}, 10, 13);
} get_cpus();
}
sub probe_longrun() {
any {
get_vendor($_) eq "Transmeta" &&
has_flag($_, 'longrun');
} get_cpus();
}
my @modules = (
# probe centrino first, it will get detected on ICH chipset and
# speedstep-ich doesn't work with it
[ "speedstep-centrino", \&probe_centrino ],
[ "acpi-cpufreq", \&probe_acpi_cpufreq ],
# try to find cpufreq compliant northbridge
[ "speedstep-ich", \&probe_ich ],
[ "speedstep-smi", \&probe_smi ],
[ "cpufreq-nforce2", \&probe_nforce2 ],
[ "gsx-suspmod", \&probe_gsx ],
# try to find a cpufreq compliant processor
[ "p4-clockmod", \&probe_p4 ],
[ "powernow-k6", \&probe_powernow_k6 ],
[ "powernow-k7", \&probe_powernow_k7 ],
[ "powernow-k8", \&probe_powernow_k8 ],
[ "longhaul", \&probe_longhaul ],
[ "e_powersaver", \&probe_e_powersaver ],
[ "longrun", \&probe_longrun ],
);
sub find_driver() {
my $m = find { $_->[1]->() } @modules;
$m && $m->[0];
}
my @governor_modules = map { "cpufreq_$_" } qw(powersave conservative ondemand);
sub get_modules() {
my $module;
if ($module = find_driver()) {
return if_($module, $module), @governor_modules;
}
();
}
1;
|
