summaryrefslogtreecommitdiffstats
path: root/arch/i386/kernel/cpu/cpufreq
diff options
context:
space:
mode:
Diffstat (limited to 'arch/i386/kernel/cpu/cpufreq')
-rw-r--r--arch/i386/kernel/cpu/cpufreq/Kconfig6
-rw-r--r--arch/i386/kernel/cpu/cpufreq/Makefile2
-rw-r--r--arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c810
-rw-r--r--arch/i386/kernel/cpu/cpufreq/gx-suspmod.c4
-rw-r--r--arch/i386/kernel/cpu/cpufreq/longhaul.c128
-rw-r--r--arch/i386/kernel/cpu/cpufreq/p4-clockmod.c38
-rw-r--r--arch/i386/kernel/cpu/cpufreq/sc520_freq.c7
-rw-r--r--arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c15
-rw-r--r--arch/i386/kernel/cpu/cpufreq/speedstep-lib.c32
-rw-r--r--arch/i386/kernel/cpu/cpufreq/speedstep-lib.h1
-rw-r--r--arch/i386/kernel/cpu/cpufreq/speedstep-smi.c3
11 files changed, 629 insertions, 417 deletions
diff --git a/arch/i386/kernel/cpu/cpufreq/Kconfig b/arch/i386/kernel/cpu/cpufreq/Kconfig
index ccc1edff5c9..5299c5bf445 100644
--- a/arch/i386/kernel/cpu/cpufreq/Kconfig
+++ b/arch/i386/kernel/cpu/cpufreq/Kconfig
@@ -17,6 +17,7 @@ config X86_ACPI_CPUFREQ
help
This driver adds a CPUFreq driver which utilizes the ACPI
Processor Performance States.
+ This driver also supports Intel Enhanced Speedstep.
For details, take a look at <file:Documentation/cpu-freq/>.
@@ -121,11 +122,14 @@ config X86_SPEEDSTEP_CENTRINO
If in doubt, say N.
config X86_SPEEDSTEP_CENTRINO_ACPI
- bool "Use ACPI tables to decode valid frequency/voltage pairs"
+ bool "Use ACPI tables to decode valid frequency/voltage (deprecated)"
depends on X86_SPEEDSTEP_CENTRINO && ACPI_PROCESSOR
depends on !(X86_SPEEDSTEP_CENTRINO = y && ACPI_PROCESSOR = m)
default y
help
+ This is deprecated and this functionality is now merged into
+ acpi_cpufreq (X86_ACPI_CPUFREQ). Use that driver instead of
+ speedstep_centrino.
Use primarily the information provided in the BIOS ACPI tables
to determine valid CPU frequency and voltage pairings. It is
required for the driver to work on non-Banias CPUs.
diff --git a/arch/i386/kernel/cpu/cpufreq/Makefile b/arch/i386/kernel/cpu/cpufreq/Makefile
index 2e894f1c891..8de3abe322a 100644
--- a/arch/i386/kernel/cpu/cpufreq/Makefile
+++ b/arch/i386/kernel/cpu/cpufreq/Makefile
@@ -7,9 +7,9 @@ obj-$(CONFIG_SC520_CPUFREQ) += sc520_freq.o
obj-$(CONFIG_X86_LONGRUN) += longrun.o
obj-$(CONFIG_X86_GX_SUSPMOD) += gx-suspmod.o
obj-$(CONFIG_X86_SPEEDSTEP_ICH) += speedstep-ich.o
-obj-$(CONFIG_X86_SPEEDSTEP_CENTRINO) += speedstep-centrino.o
obj-$(CONFIG_X86_SPEEDSTEP_LIB) += speedstep-lib.o
obj-$(CONFIG_X86_SPEEDSTEP_SMI) += speedstep-smi.o
obj-$(CONFIG_X86_ACPI_CPUFREQ) += acpi-cpufreq.o
+obj-$(CONFIG_X86_SPEEDSTEP_CENTRINO) += speedstep-centrino.o
obj-$(CONFIG_X86_P4_CLOCKMOD) += p4-clockmod.o
obj-$(CONFIG_X86_CPUFREQ_NFORCE2) += cpufreq-nforce2.o
diff --git a/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
index 57c880bf0bd..10baa3501ed 100644
--- a/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -1,9 +1,10 @@
/*
- * acpi-cpufreq.c - ACPI Processor P-States Driver ($Revision: 1.3 $)
+ * acpi-cpufreq.c - ACPI Processor P-States Driver ($Revision: 1.4 $)
*
* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
* Copyright (C) 2002 - 2004 Dominik Brodowski <linux@brodo.de>
+ * Copyright (C) 2006 Denis Sadykov <denis.m.sadykov@intel.com>
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*
@@ -27,202 +28,370 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/sched.h>
#include <linux/cpufreq.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
#include <linux/compiler.h>
-#include <linux/sched.h> /* current */
#include <linux/dmi.h>
-#include <asm/io.h>
-#include <asm/delay.h>
-#include <asm/uaccess.h>
#include <linux/acpi.h>
#include <acpi/processor.h>
+#include <asm/io.h>
+#include <asm/msr.h>
+#include <asm/processor.h>
+#include <asm/cpufeature.h>
+#include <asm/delay.h>
+#include <asm/uaccess.h>
+
#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "acpi-cpufreq", msg)
MODULE_AUTHOR("Paul Diefenbaugh, Dominik Brodowski");
MODULE_DESCRIPTION("ACPI Processor P-States Driver");
MODULE_LICENSE("GPL");
+enum {
+ UNDEFINED_CAPABLE = 0,
+ SYSTEM_INTEL_MSR_CAPABLE,
+ SYSTEM_IO_CAPABLE,
+};
+
+#define INTEL_MSR_RANGE (0xffff)
+#define CPUID_6_ECX_APERFMPERF_CAPABILITY (0x1)
-struct cpufreq_acpi_io {
- struct acpi_processor_performance *acpi_data;
- struct cpufreq_frequency_table *freq_table;
- unsigned int resume;
+struct acpi_cpufreq_data {
+ struct acpi_processor_performance *acpi_data;
+ struct cpufreq_frequency_table *freq_table;
+ unsigned int max_freq;
+ unsigned int resume;
+ unsigned int cpu_feature;
};
-static struct cpufreq_acpi_io *acpi_io_data[NR_CPUS];
-static struct acpi_processor_performance *acpi_perf_data[NR_CPUS];
+static struct acpi_cpufreq_data *drv_data[NR_CPUS];
+static struct acpi_processor_performance *acpi_perf_data[NR_CPUS];
static struct cpufreq_driver acpi_cpufreq_driver;
static unsigned int acpi_pstate_strict;
-static int
-acpi_processor_write_port(
- u16 port,
- u8 bit_width,
- u32 value)
+static int check_est_cpu(unsigned int cpuid)
{
- if (bit_width <= 8) {
- outb(value, port);
- } else if (bit_width <= 16) {
- outw(value, port);
- } else if (bit_width <= 32) {
- outl(value, port);
- } else {
- return -ENODEV;
+ struct cpuinfo_x86 *cpu = &cpu_data[cpuid];
+
+ if (cpu->x86_vendor != X86_VENDOR_INTEL ||
+ !cpu_has(cpu, X86_FEATURE_EST))
+ return 0;
+
+ return 1;
+}
+
+static unsigned extract_io(u32 value, struct acpi_cpufreq_data *data)
+{
+ struct acpi_processor_performance *perf;
+ int i;
+
+ perf = data->acpi_data;
+
+ for (i=0; i<perf->state_count; i++) {
+ if (value == perf->states[i].status)
+ return data->freq_table[i].frequency;
}
return 0;
}
-static int
-acpi_processor_read_port(
- u16 port,
- u8 bit_width,
- u32 *ret)
+static unsigned extract_msr(u32 msr, struct acpi_cpufreq_data *data)
{
- *ret = 0;
- if (bit_width <= 8) {
- *ret = inb(port);
- } else if (bit_width <= 16) {
- *ret = inw(port);
- } else if (bit_width <= 32) {
- *ret = inl(port);
- } else {
- return -ENODEV;
+ int i;
+ struct acpi_processor_performance *perf;
+
+ msr &= INTEL_MSR_RANGE;
+ perf = data->acpi_data;
+
+ for (i=0; data->freq_table[i].frequency != CPUFREQ_TABLE_END; i++) {
+ if (msr == perf->states[data->freq_table[i].index].status)
+ return data->freq_table[i].frequency;
}
- return 0;
+ return data->freq_table[0].frequency;
}
-static int
-acpi_processor_set_performance (
- struct cpufreq_acpi_io *data,
- unsigned int cpu,
- int state)
+static unsigned extract_freq(u32 val, struct acpi_cpufreq_data *data)
{
- u16 port = 0;
- u8 bit_width = 0;
- int i = 0;
- int ret = 0;
- u32 value = 0;
- int retval;
- struct acpi_processor_performance *perf;
-
- dprintk("acpi_processor_set_performance\n");
-
- retval = 0;
- perf = data->acpi_data;
- if (state == perf->state) {
- if (unlikely(data->resume)) {
- dprintk("Called after resume, resetting to P%d\n", state);
- data->resume = 0;
- } else {
- dprintk("Already at target state (P%d)\n", state);
- return (retval);
- }
+ switch (data->cpu_feature) {
+ case SYSTEM_INTEL_MSR_CAPABLE:
+ return extract_msr(val, data);
+ case SYSTEM_IO_CAPABLE:
+ return extract_io(val, data);
+ default:
+ return 0;
}
+}
+
+struct msr_addr {
+ u32 reg;
+};
- dprintk("Transitioning from P%d to P%d\n", perf->state, state);
+struct io_addr {
+ u16 port;
+ u8 bit_width;
+};
- /*
- * First we write the target state's 'control' value to the
- * control_register.
- */
+typedef union {
+ struct msr_addr msr;
+ struct io_addr io;
+} drv_addr_union;
- port = perf->control_register.address;
- bit_width = perf->control_register.bit_width;
- value = (u32) perf->states[state].control;
+struct drv_cmd {
+ unsigned int type;
+ cpumask_t mask;
+ drv_addr_union addr;
+ u32 val;
+};
- dprintk("Writing 0x%08x to port 0x%04x\n", value, port);
+static void do_drv_read(struct drv_cmd *cmd)
+{
+ u32 h;
+
+ switch (cmd->type) {
+ case SYSTEM_INTEL_MSR_CAPABLE:
+ rdmsr(cmd->addr.msr.reg, cmd->val, h);
+ break;
+ case SYSTEM_IO_CAPABLE:
+ acpi_os_read_port((acpi_io_address)cmd->addr.io.port,
+ &cmd->val,
+ (u32)cmd->addr.io.bit_width);
+ break;
+ default:
+ break;
+ }
+}
- ret = acpi_processor_write_port(port, bit_width, value);
- if (ret) {
- dprintk("Invalid port width 0x%04x\n", bit_width);
- return (ret);
+static void do_drv_write(struct drv_cmd *cmd)
+{
+ u32 h = 0;
+
+ switch (cmd->type) {
+ case SYSTEM_INTEL_MSR_CAPABLE:
+ wrmsr(cmd->addr.msr.reg, cmd->val, h);
+ break;
+ case SYSTEM_IO_CAPABLE:
+ acpi_os_write_port((acpi_io_address)cmd->addr.io.port,
+ cmd->val,
+ (u32)cmd->addr.io.bit_width);
+ break;
+ default:
+ break;
}
+}
+static void drv_read(struct drv_cmd *cmd)
+{
+ cpumask_t saved_mask = current->cpus_allowed;
+ cmd->val = 0;
+
+ set_cpus_allowed(current, cmd->mask);
+ do_drv_read(cmd);
+ set_cpus_allowed(current, saved_mask);
+}
+
+static void drv_write(struct drv_cmd *cmd)
+{
+ cpumask_t saved_mask = current->cpus_allowed;
+ unsigned int i;
+
+ for_each_cpu_mask(i, cmd->mask) {
+ set_cpus_allowed(current, cpumask_of_cpu(i));
+ do_drv_write(cmd);
+ }
+
+ set_cpus_allowed(current, saved_mask);
+ return;
+}
+
+static u32 get_cur_val(cpumask_t mask)
+{
+ struct acpi_processor_performance *perf;
+ struct drv_cmd cmd;
+
+ if (unlikely(cpus_empty(mask)))
+ return 0;
+
+ switch (drv_data[first_cpu(mask)]->cpu_feature) {
+ case SYSTEM_INTEL_MSR_CAPABLE:
+ cmd.type = SYSTEM_INTEL_MSR_CAPABLE;
+ cmd.addr.msr.reg = MSR_IA32_PERF_STATUS;
+ break;
+ case SYSTEM_IO_CAPABLE:
+ cmd.type = SYSTEM_IO_CAPABLE;
+ perf = drv_data[first_cpu(mask)]->acpi_data;
+ cmd.addr.io.port = perf->control_register.address;
+ cmd.addr.io.bit_width = perf->control_register.bit_width;
+ break;
+ default:
+ return 0;
+ }
+
+ cmd.mask = mask;
+
+ drv_read(&cmd);
+
+ dprintk("get_cur_val = %u\n", cmd.val);
+
+ return cmd.val;
+}
+
+/*
+ * Return the measured active (C0) frequency on this CPU since last call
+ * to this function.
+ * Input: cpu number
+ * Return: Average CPU frequency in terms of max frequency (zero on error)
+ *
+ * We use IA32_MPERF and IA32_APERF MSRs to get the measured performance
+ * over a period of time, while CPU is in C0 state.
+ * IA32_MPERF counts at the rate of max advertised frequency
+ * IA32_APERF counts at the rate of actual CPU frequency
+ * Only IA32_APERF/IA32_MPERF ratio is architecturally defined and
+ * no meaning should be associated with absolute values of these MSRs.
+ */
+static unsigned int get_measured_perf(unsigned int cpu)
+{
+ union {
+ struct {
+ u32 lo;
+ u32 hi;
+ } split;
+ u64 whole;
+ } aperf_cur, mperf_cur;
+
+ cpumask_t saved_mask;
+ unsigned int perf_percent;
+ unsigned int retval;
+
+ saved_mask = current->cpus_allowed;
+ set_cpus_allowed(current, cpumask_of_cpu(cpu));
+ if (get_cpu() != cpu) {
+ /* We were not able to run on requested processor */
+ put_cpu();
+ return 0;
+ }
+
+ rdmsr(MSR_IA32_APERF, aperf_cur.split.lo, aperf_cur.split.hi);
+ rdmsr(MSR_IA32_MPERF, mperf_cur.split.lo, mperf_cur.split.hi);
+
+ wrmsr(MSR_IA32_APERF, 0,0);
+ wrmsr(MSR_IA32_MPERF, 0,0);
+
+#ifdef __i386__
/*
- * Assume the write went through when acpi_pstate_strict is not used.
- * As read status_register is an expensive operation and there
- * are no specific error cases where an IO port write will fail.
+ * We dont want to do 64 bit divide with 32 bit kernel
+ * Get an approximate value. Return failure in case we cannot get
+ * an approximate value.
*/
- if (acpi_pstate_strict) {
- /* Then we read the 'status_register' and compare the value
- * with the target state's 'status' to make sure the
- * transition was successful.
- * Note that we'll poll for up to 1ms (100 cycles of 10us)
- * before giving up.
- */
-
- port = perf->status_register.address;
- bit_width = perf->status_register.bit_width;
-
- dprintk("Looking for 0x%08x from port 0x%04x\n",
- (u32) perf->states[state].status, port);
-
- for (i = 0; i < 100; i++) {
- ret = acpi_processor_read_port(port, bit_width, &value);
- if (ret) {
- dprintk("Invalid port width 0x%04x\n", bit_width);
- return (ret);
- }
- if (value == (u32) perf->states[state].status)
- break;
- udelay(10);
- }
- } else {
- value = (u32) perf->states[state].status;
+ if (unlikely(aperf_cur.split.hi || mperf_cur.split.hi)) {
+ int shift_count;
+ u32 h;
+
+ h = max_t(u32, aperf_cur.split.hi, mperf_cur.split.hi);
+ shift_count = fls(h);
+
+ aperf_cur.whole >>= shift_count;
+ mperf_cur.whole >>= shift_count;
+ }
+
+ if (((unsigned long)(-1) / 100) < aperf_cur.split.lo) {
+ int shift_count = 7;
+ aperf_cur.split.lo >>= shift_count;
+ mperf_cur.split.lo >>= shift_count;
+ }
+
+ if (aperf_cur.split.lo && mperf_cur.split.lo)
+ perf_percent = (aperf_cur.split.lo * 100) / mperf_cur.split.lo;
+ else
+ perf_percent = 0;
+
+#else
+ if (unlikely(((unsigned long)(-1) / 100) < aperf_cur.whole)) {
+ int shift_count = 7;
+ aperf_cur.whole >>= shift_count;
+ mperf_cur.whole >>= shift_count;
}
- if (unlikely(value != (u32) perf->states[state].status)) {
- printk(KERN_WARNING "acpi-cpufreq: Transition failed\n");
- retval = -ENODEV;
- return (retval);
+ if (aperf_cur.whole && mperf_cur.whole)
+ perf_percent = (aperf_cur.whole * 100) / mperf_cur.whole;
+ else
+ perf_percent = 0;
+
+#endif
+
+ retval = drv_data[cpu]->max_freq * perf_percent / 100;
+
+ put_cpu();
+ set_cpus_allowed(current, saved_mask);
+
+ dprintk("cpu %d: performance percent %d\n", cpu, perf_percent);
+ return retval;
+}
+
+static unsigned int get_cur_freq_on_cpu(unsigned int cpu)
+{
+ struct acpi_cpufreq_data *data = drv_data[cpu];
+ unsigned int freq;
+
+ dprintk("get_cur_freq_on_cpu (%d)\n", cpu);
+
+ if (unlikely(data == NULL ||
+ data->acpi_data == NULL || data->freq_table == NULL)) {
+ return 0;
}
- dprintk("Transition successful after %d microseconds\n", i * 10);
+ freq = extract_freq(get_cur_val(cpumask_of_cpu(cpu)), data);
+ dprintk("cur freq = %u\n", freq);
- perf->state = state;
- return (retval);
+ return freq;
}
+static unsigned int check_freqs(cpumask_t mask, unsigned int freq,
+ struct acpi_cpufreq_data *data)
+{
+ unsigned int cur_freq;
+ unsigned int i;
+
+ for (i=0; i<100; i++) {
+ cur_freq = extract_freq(get_cur_val(mask), data);
+ if (cur_freq == freq)
+ return 1;
+ udelay(10);
+ }
+ return 0;
+}
-static int
-acpi_cpufreq_target (
- struct cpufreq_policy *policy,
- unsigned int target_freq,
- unsigned int relation)
+static int acpi_cpufreq_target(struct cpufreq_policy *policy,
+ unsigned int target_freq, unsigned int relation)
{
- struct cpufreq_acpi_io *data = acpi_io_data[policy->cpu];
+ struct acpi_cpufreq_data *data = drv_data[policy->cpu];
struct acpi_processor_performance *perf;
struct cpufreq_freqs freqs;
cpumask_t online_policy_cpus;
- cpumask_t saved_mask;
- cpumask_t set_mask;
- cpumask_t covered_cpus;
- unsigned int cur_state = 0;
- unsigned int next_state = 0;
- unsigned int result = 0;
- unsigned int j;
- unsigned int tmp;
+ struct drv_cmd cmd;
+ unsigned int msr;
+ unsigned int next_state = 0; /* Index into freq_table */
+ unsigned int next_perf_state = 0; /* Index into perf table */
+ unsigned int i;
+ int result = 0;
- dprintk("acpi_cpufreq_setpolicy\n");
+ dprintk("acpi_cpufreq_target %d (%d)\n", target_freq, policy->cpu);
- result = cpufreq_frequency_table_target(policy,
- data->freq_table,
- target_freq,
- relation,
- &next_state);
- if (unlikely(result))
- return (result);
+ if (unlikely(data == NULL ||
+ data->acpi_data == NULL || data->freq_table == NULL)) {
+ return -ENODEV;
+ }
perf = data->acpi_data;
- cur_state = perf->state;
- freqs.old = data->freq_table[cur_state].frequency;
- freqs.new = data->freq_table[next_state].frequency;
+ result = cpufreq_frequency_table_target(policy,
+ data->freq_table,
+ target_freq,
+ relation, &next_state);
+ if (unlikely(result))
+ return -ENODEV;
#ifdef CONFIG_HOTPLUG_CPU
/* cpufreq holds the hotplug lock, so we are safe from here on */
@@ -231,106 +400,85 @@ acpi_cpufreq_target (
online_policy_cpus = policy->cpus;
#endif
- for_each_cpu_mask(j, online_policy_cpus) {
- freqs.cpu = j;
- cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
+ next_perf_state = data->freq_table[next_state].index;
+ if (perf->state == next_perf_state) {
+ if (unlikely(data->resume)) {
+ dprintk("Called after resume, resetting to P%d\n",
+ next_perf_state);
+ data->resume = 0;
+ } else {
+ dprintk("Already at target state (P%d)\n",
+ next_perf_state);
+ return 0;
+ }
}
- /*
- * We need to call driver->target() on all or any CPU in
- * policy->cpus, depending on policy->shared_type.
- */
- saved_mask = current->cpus_allowed;
- cpus_clear(covered_cpus);
- for_each_cpu_mask(j, online_policy_cpus) {
- /*
- * Support for SMP systems.
- * Make sure we are running on CPU that wants to change freq
- */
- cpus_clear(set_mask);
- if (policy->shared_type == CPUFREQ_SHARED_TYPE_ANY)
- cpus_or(set_mask, set_mask, online_policy_cpus);
- else
- cpu_set(j, set_mask);
-
- set_cpus_allowed(current, set_mask);
- if (unlikely(!cpu_isset(smp_processor_id(), set_mask))) {
- dprintk("couldn't limit to CPUs in this domain\n");
- result = -EAGAIN;
- break;
- }
+ switch (data->cpu_feature) {
+ case SYSTEM_INTEL_MSR_CAPABLE:
+ cmd.type = SYSTEM_INTEL_MSR_CAPABLE;
+ cmd.addr.msr.reg = MSR_IA32_PERF_CTL;
+ msr =
+ (u32) perf->states[next_perf_state].
+ control & INTEL_MSR_RANGE;
+ cmd.val = get_cur_val(online_policy_cpus);
+ cmd.val = (cmd.val & ~INTEL_MSR_RANGE) | msr;
+ break;
+ case SYSTEM_IO_CAPABLE:
+ cmd.type = SYSTEM_IO_CAPABLE;
+ cmd.addr.io.port = perf->control_register.address;
+ cmd.addr.io.bit_width = perf->control_register.bit_width;
+ cmd.val = (u32) perf->states[next_perf_state].control;
+ break;
+ default:
+ return -ENODEV;
+ }
- result = acpi_processor_set_performance (data, j, next_state);
- if (result) {
- result = -EAGAIN;
- break;
- }
+ cpus_clear(cmd.mask);
- if (policy->shared_type == CPUFREQ_SHARED_TYPE_ANY)
- break;
-
- cpu_set(j, covered_cpus);
- }
+ if (policy->shared_type != CPUFREQ_SHARED_TYPE_ANY)
+ cmd.mask = online_policy_cpus;
+ else
+ cpu_set(policy->cpu, cmd.mask);
- for_each_cpu_mask(j, online_policy_cpus) {
- freqs.cpu = j;
- cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
+ freqs.old = perf->states[perf->state].core_frequency * 1000;
+ freqs.new = data->freq_table[next_state].frequency;
+ for_each_cpu_mask(i, cmd.mask) {
+ freqs.cpu = i;
+ cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
}
- if (unlikely(result)) {
- /*
- * We have failed halfway through the frequency change.
- * We have sent callbacks to online_policy_cpus and
- * acpi_processor_set_performance() has been called on
- * coverd_cpus. Best effort undo..
- */
-
- if (!cpus_empty(covered_cpus)) {
- for_each_cpu_mask(j, covered_cpus) {
- policy->cpu = j;
- acpi_processor_set_performance (data,
- j,
- cur_state);
- }
- }
+ drv_write(&cmd);
- tmp = freqs.new;
- freqs.new = freqs.old;
- freqs.old = tmp;
- for_each_cpu_mask(j, online_policy_cpus) {
- freqs.cpu = j;
- cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
- cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
+ if (acpi_pstate_strict) {
+ if (!check_freqs(cmd.mask, freqs.new, data)) {
+ dprintk("acpi_cpufreq_target failed (%d)\n",
+ policy->cpu);
+ return -EAGAIN;
}
}
- set_cpus_allowed(current, saved_mask);
- return (result);
-}
+ for_each_cpu_mask(i, cmd.mask) {
+ freqs.cpu = i;
+ cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
+ }
+ perf->state = next_perf_state;
+ return result;
+}
-static int
-acpi_cpufreq_verify (
- struct cpufreq_policy *policy)
+static int acpi_cpufreq_verify(struct cpufreq_policy *policy)
{
- unsigned int result = 0;
- struct cpufreq_acpi_io *data = acpi_io_data[policy->cpu];
+ struct acpi_cpufreq_data *data = drv_data[policy->cpu];
dprintk("acpi_cpufreq_verify\n");
- result = cpufreq_frequency_table_verify(policy,
- data->freq_table);
-
- return (result);
+ return cpufreq_frequency_table_verify(policy, data->freq_table);
}
-
static unsigned long
-acpi_cpufreq_guess_freq (
- struct cpufreq_acpi_io *data,
- unsigned int cpu)
+acpi_cpufreq_guess_freq(struct acpi_cpufreq_data *data, unsigned int cpu)
{
- struct acpi_processor_performance *perf = data->acpi_data;
+ struct acpi_processor_performance *perf = data->acpi_data;
if (cpu_khz) {
/* search the closest match to cpu_khz */
@@ -338,16 +486,16 @@ acpi_cpufreq_guess_freq (
unsigned long freq;
unsigned long freqn = perf->states[0].core_frequency * 1000;
- for (i = 0; i < (perf->state_count - 1); i++) {
+ for (i=0; i<(perf->state_count-1); i++) {
freq = freqn;
freqn = perf->states[i+1].core_frequency * 1000;
if ((2 * cpu_khz) > (freqn + freq)) {
perf->state = i;
- return (freq);
+ return freq;
}
}
- perf->state = perf->state_count - 1;
- return (freqn);
+ perf->state = perf->state_count-1;
+ return freqn;
} else {
/* assume CPU is at P0... */
perf->state = 0;
@@ -355,7 +503,6 @@ acpi_cpufreq_guess_freq (
}
}
-
/*
* acpi_cpufreq_early_init - initialize ACPI P-States library
*
@@ -364,30 +511,34 @@ acpi_cpufreq_guess_freq (
* do _PDC and _PSD and find out the processor dependency for the
* actual init that will happen later...
*/
-static int acpi_cpufreq_early_init_acpi(void)
+static int acpi_cpufreq_early_init(void)
{
- struct acpi_processor_performance *data;
- unsigned int i, j;
+ struct acpi_processor_performance *data;
+ cpumask_t covered;
+ unsigned int i, j;
dprintk("acpi_cpufreq_early_init\n");
for_each_possible_cpu(i) {
- data = kzalloc(sizeof(struct acpi_processor_performance),
- GFP_KERNEL);
+ data = kzalloc(sizeof(struct acpi_processor_performance),
+ GFP_KERNEL);
if (!data) {
- for_each_possible_cpu(j) {
+ for_each_cpu_mask(j, covered) {
kfree(acpi_perf_data[j]);
acpi_perf_data[j] = NULL;
}
- return (-ENOMEM);
+ return -ENOMEM;
}
acpi_perf_data[i] = data;
+ cpu_set(i, covered);
}
/* Do initialization in ACPI core */
- return acpi_processor_preregister_performance(acpi_perf_data);
+ acpi_processor_preregister_performance(acpi_perf_data);
+ return 0;
}
+#ifdef CONFIG_SMP
/*
* Some BIOSes do SW_ANY coordination internally, either set it up in hw
* or do it in BIOS firmware and won't inform about it to OS. If not
@@ -414,39 +565,42 @@ static struct dmi_system_id sw_any_bug_dmi_table[] = {
},
{ }
};
+#endif
-static int
-acpi_cpufreq_cpu_init (
- struct cpufreq_policy *policy)
+static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
{
- unsigned int i;
- unsigned int cpu = policy->cpu;
- struct cpufreq_acpi_io *data;
- unsigned int result = 0;
+ unsigned int i;
+ unsigned int valid_states = 0;
+ unsigned int cpu = policy->cpu;
+ struct acpi_cpufreq_data *data;
+ unsigned int result = 0;
struct cpuinfo_x86 *c = &cpu_data[policy->cpu];
- struct acpi_processor_performance *perf;
+ struct acpi_processor_performance *perf;
dprintk("acpi_cpufreq_cpu_init\n");
if (!acpi_perf_data[cpu])
- return (-ENODEV);
+ return -ENODEV;
- data = kzalloc(sizeof(struct cpufreq_acpi_io), GFP_KERNEL);
+ data = kzalloc(sizeof(struct acpi_cpufreq_data), GFP_KERNEL);
if (!data)
- return (-ENOMEM);
+ return -ENOMEM;
data->acpi_data = acpi_perf_data[cpu];
- acpi_io_data[cpu] = data;
+ drv_data[cpu] = data;
- result = acpi_processor_register_performance(data->acpi_data, cpu);
+ if (cpu_has(c, X86_FEATURE_CONSTANT_TSC))
+ acpi_cpufreq_driver.flags |= CPUFREQ_CONST_LOOPS;
+ result = acpi_processor_register_performance(data->acpi_data, cpu);
if (result)
goto err_free;
perf = data->acpi_data;
policy->shared_type = perf->shared_type;
+
/*
- * Will let policy->cpus know about dependency only when software
+ * Will let policy->cpus know about dependency only when software
* coordination is required.
*/
if (policy->shared_type == CPUFREQ_SHARED_TYPE_ALL ||
@@ -462,10 +616,6 @@ acpi_cpufreq_cpu_init (
}
#endif
- if (cpu_has(c, X86_FEATURE_CONSTANT_TSC)) {
- acpi_cpufreq_driver.flags |= CPUFREQ_CONST_LOOPS;
- }
-
/* capability check */
if (perf->state_count <= 1) {
dprintk("No P-States\n");
@@ -473,17 +623,33 @@ acpi_cpufreq_cpu_init (
goto err_unreg;
}
- if ((perf->control_register.space_id != ACPI_ADR_SPACE_SYSTEM_IO) ||
- (perf->status_register.space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
- dprintk("Unsupported address space [%d, %d]\n",
- (u32) (perf->control_register.space_id),
- (u32) (perf->status_register.space_id));
+ if (perf->control_register.space_id != perf->status_register.space_id) {
result = -ENODEV;
goto err_unreg;
}
- /* alloc freq_table */
- data->freq_table = kmalloc(sizeof(struct cpufreq_frequency_table) * (perf->state_count + 1), GFP_KERNEL);
+ switch (perf->control_register.space_id) {
+ case ACPI_ADR_SPACE_SYSTEM_IO:
+ dprintk("SYSTEM IO addr space\n");
+ data->cpu_feature = SYSTEM_IO_CAPABLE;
+ break;
+ case ACPI_ADR_SPACE_FIXED_HARDWARE:
+ dprintk("HARDWARE addr space\n");
+ if (!check_est_cpu(cpu)) {
+ result = -ENODEV;
+ goto err_unreg;
+ }
+ data->cpu_feature = SYSTEM_INTEL_MSR_CAPABLE;
+ break;
+ default:
+ dprintk("Unknown addr space %d\n",
+ (u32) (perf->control_register.space_id));
+ result = -ENODEV;
+ goto err_unreg;
+ }
+
+ data->freq_table = kmalloc(sizeof(struct cpufreq_frequency_table) *
+ (perf->state_count+1), GFP_KERNEL);
if (!data->freq_table) {
result = -ENOMEM;
goto err_unreg;
@@ -492,129 +658,141 @@ acpi_cpufreq_cpu_init (
/* detect transition latency */
policy->cpuinfo.transition_latency = 0;
for (i=0; i<perf->state_count; i++) {
- if ((perf->states[i].transition_latency * 1000) > policy->cpuinfo.transition_latency)
- policy->cpuinfo.transition_latency = perf->states[i].transition_latency * 1000;
+ if ((perf->states[i].transition_latency * 1000) >
+ policy->cpuinfo.transition_latency)
+ policy->cpuinfo.transition_latency =
+ perf->states[i].transition_latency * 1000;
}
policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
- /* The current speed is unknown and not detectable by ACPI... */
- policy->cur = acpi_cpufreq_guess_freq(data, policy->cpu);
-
+ data->max_freq = perf->states[0].core_frequency * 1000;
/* table init */
- for (i=0; i<=perf->state_count; i++)
- {
- data->freq_table[i].index = i;
- if (i<perf->state_count)
- data->freq_table[i].frequency = perf->states[i].core_frequency * 1000;
- else
- data->freq_table[i].frequency = CPUFREQ_TABLE_END;
+ for (i=0; i<perf->state_count; i++) {
+ if (i>0 && perf->states[i].core_frequency ==
+ perf->states[i-1].core_frequency)
+ continue;
+
+ data->freq_table[valid_states].index = i;
+ data->freq_table[valid_states].frequency =
+ perf->states[i].core_frequency * 1000;
+ valid_states++;
}
+ data->freq_table[valid_states].frequency = CPUFREQ_TABLE_END;
+ perf->state = 0;
result = cpufreq_frequency_table_cpuinfo(policy, data->freq_table);
- if (result) {
+ if (result)
goto err_freqfree;
+
+ switch (perf->control_register.space_id) {
+ case ACPI_ADR_SPACE_SYSTEM_IO:
+ /* Current speed is unknown and not detectable by IO port */
+ policy->cur = acpi_cpufreq_guess_freq(data, policy->cpu);
+ break;
+ case ACPI_ADR_SPACE_FIXED_HARDWARE:
+ acpi_cpufreq_driver.get = get_cur_freq_on_cpu;
+ policy->cur = get_cur_freq_on_cpu(cpu);
+ break;
+ default:
+ break;
}
/* notify BIOS that we exist */
acpi_processor_notify_smm(THIS_MODULE);
- printk(KERN_INFO "acpi-cpufreq: CPU%u - ACPI performance management activated.\n",
- cpu);
+ /* Check for APERF/MPERF support in hardware */
+ if (c->x86_vendor == X86_VENDOR_INTEL && c->cpuid_level >= 6) {
+ unsigned int ecx;
+ ecx = cpuid_ecx(6);
+ if (ecx & CPUID_6_ECX_APERFMPERF_CAPABILITY)
+ acpi_cpufreq_driver.getavg = get_measured_perf;
+ }
+
+ dprintk("CPU%u - ACPI performance management activated.\n", cpu);
for (i = 0; i < perf->state_count; i++)
dprintk(" %cP%d: %d MHz, %d mW, %d uS\n",
- (i == perf->state?'*':' '), i,
+ (i == perf->state ? '*' : ' '), i,
(u32) perf->states[i].core_frequency,
(u32) perf->states[i].power,
(u32) perf->states[i].transition_latency);
cpufreq_frequency_table_get_attr(data->freq_table, policy->cpu);
-
+
/*
* the first call to ->target() should result in us actually
* writing something to the appropriate registers.
*/
data->resume = 1;
-
- return (result);
- err_freqfree:
+ return result;
+
+err_freqfree:
kfree(data->freq_table);
- err_unreg:
+err_unreg:
acpi_processor_unregister_performance(perf, cpu);
- err_free:
+err_free:
kfree(data);
- acpi_io_data[cpu] = NULL;
+ drv_data[cpu] = NULL;
- return (result);
+ return result;
}
-
-static int
-acpi_cpufreq_cpu_exit (
- struct cpufreq_policy *policy)
+static int acpi_cpufreq_cpu_exit(struct cpufreq_policy *policy)
{
- struct cpufreq_acpi_io *data = acpi_io_data[policy->cpu];
-
+ struct acpi_cpufreq_data *data = drv_data[policy->cpu];
dprintk("acpi_cpufreq_cpu_exit\n");
if (data) {
cpufreq_frequency_table_put_attr(policy->cpu);
- acpi_io_data[policy->cpu] = NULL;
- acpi_processor_unregister_performance(data->acpi_data, policy->cpu);
+ drv_data[policy->cpu] = NULL;
+ acpi_processor_unregister_performance(data->acpi_data,
+ policy->cpu);
kfree(data);
}
- return (0);
+ return 0;
}
-static int
-acpi_cpufreq_resume (
- struct cpufreq_policy *policy)
+static int acpi_cpufreq_resume(struct cpufreq_policy *policy)
{
- struct cpufreq_acpi_io *data = acpi_io_data[policy->cpu];
-
+ struct acpi_cpufreq_data *data = drv_data[policy->cpu];
dprintk("acpi_cpufreq_resume\n");
data->resume = 1;
- return (0);
+ return 0;
}
-
-static struct freq_attr* acpi_cpufreq_attr[] = {
+static struct freq_attr *acpi_cpufreq_attr[] = {
&cpufreq_freq_attr_scaling_available_freqs,
NULL,
};
static struct cpufreq_driver acpi_cpufreq_driver = {
- .verify = acpi_cpufreq_verify,
- .target = acpi_cpufreq_target,
- .init = acpi_cpufreq_cpu_init,
- .exit = acpi_cpufreq_cpu_exit,
- .resume = acpi_cpufreq_resume,
- .name = "acpi-cpufreq",
- .owner = THIS_MODULE,
- .attr = acpi_cpufreq_attr,
+ .verify = acpi_cpufreq_verify,
+ .target = acpi_cpufreq_target,
+ .init = acpi_cpufreq_cpu_init,
+ .exit = acpi_cpufreq_cpu_exit,
+ .resume = acpi_cpufreq_resume,
+ .name = "acpi-cpufreq",
+ .owner = THIS_MODULE,
+ .attr = acpi_cpufreq_attr,
};
-
-static int __init
-acpi_cpufreq_init (void)
+static int __init acpi_cpufreq_init(void)
{
dprintk("acpi_cpufreq_init\n");
- acpi_cpufreq_early_init_acpi();
+ acpi_cpufreq_early_init();
return cpufreq_register_driver(&acpi_cpufreq_driver);
}
-
-static void __exit
-acpi_cpufreq_exit (void)
+static void __exit acpi_cpufreq_exit(void)
{
- unsigned int i;
+ unsigned int i;
dprintk("acpi_cpufreq_exit\n");
cpufreq_unregister_driver(&acpi_cpufreq_driver);
@@ -627,7 +805,9 @@ acpi_cpufreq_exit (void)
}
module_param(acpi_pstate_strict, uint, 0644);
-MODULE_PARM_DESC(acpi_pstate_strict, "value 0 or non-zero. non-zero -> strict ACPI checks are performed during frequency changes.");
+MODULE_PARM_DESC(acpi_pstate_strict,
+ "value 0 or non-zero. non-zero -> strict ACPI checks are "
+ "performed during frequency changes.");
late_initcall(acpi_cpufreq_init);
module_exit(acpi_cpufreq_exit);
diff --git a/arch/i386/kernel/cpu/cpufreq/gx-suspmod.c b/arch/i386/kernel/cpu/cpufreq/gx-suspmod.c
index 92afa3bc84f..6667e9cceb9 100644
--- a/arch/i386/kernel/cpu/cpufreq/gx-suspmod.c
+++ b/arch/i386/kernel/cpu/cpufreq/gx-suspmod.c
@@ -447,7 +447,6 @@ static int __init cpufreq_gx_init(void)
int ret;
struct gxfreq_params *params;
struct pci_dev *gx_pci;
- u32 class_rev;
/* Test if we have the right hardware */
if ((gx_pci = gx_detect_chipset()) == NULL)
@@ -472,8 +471,7 @@ static int __init cpufreq_gx_init(void)
pci_read_config_byte(params->cs55x0, PCI_PMER2, &(params->pci_pmer2));
pci_read_config_byte(params->cs55x0, PCI_MODON, &(params->on_duration));
pci_read_config_byte(params->cs55x0, PCI_MODOFF, &(params->off_duration));
- pci_read_config_dword(params->cs55x0, PCI_CLASS_REVISION, &class_rev);
- params->pci_rev = class_rev && 0xff;
+ pci_read_config_byte(params->cs55x0, PCI_REVISION_ID, &params->pci_rev);
if ((ret = cpufreq_register_driver(&gx_suspmod_driver))) {
kfree(params);
diff --git a/arch/i386/kernel/cpu/cpufreq/longhaul.c b/arch/i386/kernel/cpu/cpufreq/longhaul.c
index 7233abe5d69..e940e00b96c 100644
--- a/arch/i386/kernel/cpu/cpufreq/longhaul.c
+++ b/arch/i386/kernel/cpu/cpufreq/longhaul.c
@@ -52,6 +52,10 @@
#define CPU_EZRA_T 4
#define CPU_NEHEMIAH 5
+/* Flags */
+#define USE_ACPI_C3 (1 << 1)
+#define USE_NORTHBRIDGE (1 << 2)
+
static int cpu_model;
static unsigned int numscales=16;
static unsigned int fsb;
@@ -68,7 +72,7 @@ static unsigned int minmult, maxmult;
static int can_scale_voltage;
static struct acpi_processor *pr = NULL;
static struct acpi_processor_cx *cx = NULL;
-static int port22_en;
+static u8 longhaul_flags;
/* Module parameters */
static int scale_voltage;
@@ -80,7 +84,6 @@ static int ignore_latency;
/* Clock ratios multiplied by 10 */
static int clock_ratio[32];
static int eblcr_table[32];
-static unsigned int highest_speed, lowest_speed; /* kHz */
static int longhaul_version;
static struct cpufreq_frequency_table *longhaul_table;
@@ -178,7 +181,7 @@ static void do_powersaver(int cx_address, unsigned int clock_ratio_index)
safe_halt();
/* Change frequency on next halt or sleep */
wrmsrl(MSR_VIA_LONGHAUL, longhaul.val);
- if (port22_en) {
+ if (!cx_address) {
ACPI_FLUSH_CPU_CACHE();
/* Invoke C1 */
halt();
@@ -189,7 +192,6 @@ static void do_powersaver(int cx_address, unsigned int clock_ratio_index)
/* Dummy op - must do something useless after P_LVL3 read */
t = inl(acpi_fadt.xpm_tmr_blk.address);
}
-
/* Disable bus ratio bit */
local_irq_disable();
longhaul.bits.RevisionKey = longhaul.bits.RevisionID;
@@ -243,15 +245,14 @@ static void longhaul_setstate(unsigned int clock_ratio_index)
outb(0xFF,0xA1); /* Overkill */
outb(0xFE,0x21); /* TMR0 only */
- if (pr->flags.bm_control) {
+ if (longhaul_flags & USE_NORTHBRIDGE) {
+ /* Disable AGP and PCI arbiters */
+ outb(3, 0x22);
+ } else if ((pr != NULL) && pr->flags.bm_control) {
/* Disable bus master arbitration */
acpi_set_register(ACPI_BITREG_ARB_DISABLE, 1,
ACPI_MTX_DO_NOT_LOCK);
- } else if (port22_en) {
- /* Disable AGP and PCI arbiters */
- outb(3, 0x22);
}
-
switch (longhaul_version) {
/*
@@ -278,22 +279,25 @@ static void longhaul_setstate(unsigned int clock_ratio_index)
* to work in practice.
*/
case TYPE_POWERSAVER:
- /* Don't allow wakeup */
- acpi_set_register(ACPI_BITREG_BUS_MASTER_RLD, 0,
- ACPI_MTX_DO_NOT_LOCK);
- do_powersaver(cx->address, clock_ratio_index);
+ if (longhaul_flags & USE_ACPI_C3) {
+ /* Don't allow wakeup */
+ acpi_set_register(ACPI_BITREG_BUS_MASTER_RLD, 0,
+ ACPI_MTX_DO_NOT_LOCK);
+ do_powersaver(cx->address, clock_ratio_index);
+ } else {
+ do_powersaver(0, clock_ratio_index);
+ }
break;
}
- if (pr->flags.bm_control) {
+ if (longhaul_flags & USE_NORTHBRIDGE) {
+ /* Enable arbiters */
+ outb(0, 0x22);
+ } else if ((pr != NULL) && pr->flags.bm_control) {
/* Enable bus master arbitration */
acpi_set_register(ACPI_BITREG_ARB_DISABLE, 0,
ACPI_MTX_DO_NOT_LOCK);
- } else if (port22_en) {
- /* Enable arbiters */
- outb(0, 0x22);
}
-
outb(pic2_mask,0xA1); /* restore mask */
outb(pic1_mask,0x21);
@@ -314,12 +318,12 @@ static void longhaul_setstate(unsigned int clock_ratio_index)
#define ROUNDING 0xf
-static int _guess(int guess)
+static int _guess(int guess, int mult)
{
int target;
- target = ((maxmult/10)*guess);
- if (maxmult%10 != 0)
+ target = ((mult/10)*guess);
+ if (mult%10 != 0)
target += (guess/2);
target += ROUNDING/2;
target &= ~ROUNDING;
@@ -327,17 +331,17 @@ static int _guess(int guess)
}
-static int guess_fsb(void)
+static int guess_fsb(int mult)
{
int speed = (cpu_khz/1000);
int i;
- int speeds[3] = { 66, 100, 133 };
+ int speeds[] = { 66, 100, 133, 200 };
speed += ROUNDING/2;
speed &= ~ROUNDING;
- for (i=0; i<3; i++) {
- if (_guess(speeds[i]) == speed)
+ for (i=0; i<4; i++) {
+ if (_guess(speeds[i], mult) == speed)
return speeds[i];
}
return 0;
@@ -354,9 +358,7 @@ static int __init longhaul_get_ranges(void)
130, 150, 160, 140, -1, 155, -1, 145 };
unsigned int j, k = 0;
union msr_longhaul longhaul;
- unsigned long lo, hi;
- unsigned int eblcr_fsb_table_v1[] = { 66, 133, 100, -1 };
- unsigned int eblcr_fsb_table_v2[] = { 133, 100, -1, 66 };
+ int mult = 0;
switch (longhaul_version) {
case TYPE_LONGHAUL_V1:
@@ -364,30 +366,18 @@ static int __init longhaul_get_ranges(void)
/* Ugh, Longhaul v1 didn't have the min/max MSRs.
Assume min=3.0x & max = whatever we booted at. */
minmult = 30;
- maxmult = longhaul_get_cpu_mult();
- rdmsr (MSR_IA32_EBL_CR_POWERON, lo, hi);
- invalue = (lo & (1<<18|1<<19)) >>18;
- if (cpu_model==CPU_SAMUEL || cpu_model==CPU_SAMUEL2)
- fsb = eblcr_fsb_table_v1[invalue];
- else
- fsb = guess_fsb();
+ maxmult = mult = longhaul_get_cpu_mult();
break;
case TYPE_POWERSAVER:
/* Ezra-T */
if (cpu_model==CPU_EZRA_T) {
+ minmult = 30;
rdmsrl (MSR_VIA_LONGHAUL, longhaul.val);
invalue = longhaul.bits.MaxMHzBR;
if (longhaul.bits.MaxMHzBR4)
invalue += 16;
- maxmult=ezra_t_multipliers[invalue];
-
- invalue = longhaul.bits.MinMHzBR;
- if (longhaul.bits.MinMHzBR4 == 1)
- minmult = 30;
- else
- minmult = ezra_t_multipliers[invalue];
- fsb = eblcr_fsb_table_v2[longhaul.bits.MaxMHzFSB];
+ maxmult = mult = ezra_t_multipliers[invalue];
break;
}
@@ -407,21 +397,16 @@ static int __init longhaul_get_ranges(void)
* But it works, so we don't grumble.
*/
minmult=40;
- maxmult=longhaul_get_cpu_mult();
-
- /* Starting with the 1.2GHz parts, theres a 200MHz bus. */
- if ((cpu_khz/1000) > 1200)
- fsb = 200;
- else
- fsb = eblcr_fsb_table_v2[longhaul.bits.MaxMHzFSB];
+ maxmult = mult = longhaul_get_cpu_mult();
break;
}
}
+ fsb = guess_fsb(mult);
dprintk ("MinMult:%d.%dx MaxMult:%d.%dx\n",
minmult/10, minmult%10, maxmult/10, maxmult%10);
- if (fsb == -1) {
+ if (fsb == 0) {
printk (KERN_INFO PFX "Invalid (reserved) FSB!\n");
return -EINVAL;
}
@@ -583,6 +568,10 @@ static int enable_arbiter_disable(void)
if (dev == NULL) {
reg = 0x76;
dev = pci_find_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_862X_0, NULL);
+ /* Find CN400 V-Link host bridge */
+ if (dev == NULL)
+ dev = pci_find_device(PCI_VENDOR_ID_VIA, 0x7259, NULL);
+
}
if (dev != NULL) {
/* Enable access to port 0x22 */
@@ -687,27 +676,32 @@ static int __init longhaul_cpu_init(struct cpufreq_policy *policy)
/* Find ACPI data for processor */
acpi_walk_namespace(ACPI_TYPE_PROCESSOR, ACPI_ROOT_OBJECT, ACPI_UINT32_MAX,
&longhaul_walk_callback, NULL, (void *)&pr);
- if (pr == NULL)
- goto err_acpi;
- if (longhaul_version == TYPE_POWERSAVER) {
- /* Check ACPI support for C3 state */
+ /* Check ACPI support for C3 state */
+ if ((pr != NULL) && (longhaul_version == TYPE_POWERSAVER)) {
cx = &pr->power.states[ACPI_STATE_C3];
if (cx->address > 0 &&
(cx->latency <= 1000 || ignore_latency != 0) ) {
+ longhaul_flags |= USE_ACPI_C3;
goto print_support_type;
}
}
+ /* Check if northbridge is friendly */
+ if (enable_arbiter_disable()) {
+ longhaul_flags |= USE_NORTHBRIDGE;
+ goto print_support_type;
+ }
+
+ /* No ACPI C3 or we can't use it */
/* Check ACPI support for bus master arbiter disable */
- if (!pr->flags.bm_control) {
- if (enable_arbiter_disable()) {
- port22_en = 1;
- } else {
- goto err_acpi;
- }
+ if ((pr == NULL) || !(pr->flags.bm_control)) {
+ printk(KERN_ERR PFX
+ "No ACPI support. Unsupported northbridge.\n");
+ return -ENODEV;
}
+
print_support_type:
- if (!port22_en) {
+ if (!(longhaul_flags & USE_NORTHBRIDGE)) {
printk (KERN_INFO PFX "Using ACPI support.\n");
} else {
printk (KERN_INFO PFX "Using northbridge support.\n");
@@ -732,10 +726,6 @@ print_support_type:
cpufreq_frequency_table_get_attr(longhaul_table, policy->cpu);
return 0;
-
-err_acpi:
- printk(KERN_ERR PFX "No ACPI support. No VT8601 or VT8623 northbridge. Aborting.\n");
- return -ENODEV;
}
static int __devexit longhaul_cpu_exit(struct cpufreq_policy *policy)
@@ -770,8 +760,8 @@ static int __init longhaul_init(void)
#ifdef CONFIG_SMP
if (num_online_cpus() > 1) {
- return -ENODEV;
printk(KERN_ERR PFX "More than 1 CPU detected, longhaul disabled.\n");
+ return -ENODEV;
}
#endif
#ifdef CONFIG_X86_IO_APIC
@@ -783,8 +773,10 @@ static int __init longhaul_init(void)
switch (c->x86_model) {
case 6 ... 9:
return cpufreq_register_driver(&longhaul_driver);
+ case 10:
+ printk(KERN_ERR PFX "Use acpi-cpufreq driver for VIA C7\n");
default:
- printk (KERN_INFO PFX "Unknown VIA CPU. Contact davej@codemonkey.org.uk\n");
+ ;;
}
return -ENODEV;
diff --git a/arch/i386/kernel/cpu/cpufreq/p4-clockmod.c b/arch/i386/kernel/cpu/cpufreq/p4-clockmod.c
index 304d2eaa4a1..bec50170b75 100644
--- a/arch/i386/kernel/cpu/cpufreq/p4-clockmod.c
+++ b/arch/i386/kernel/cpu/cpufreq/p4-clockmod.c
@@ -163,29 +163,27 @@ static int cpufreq_p4_verify(struct cpufreq_policy *policy)
static unsigned int cpufreq_p4_get_frequency(struct cpuinfo_x86 *c)
{
- if ((c->x86 == 0x06) && (c->x86_model == 0x09)) {
- /* Pentium M (Banias) */
- printk(KERN_WARNING PFX "Warning: Pentium M detected. "
- "The speedstep_centrino module offers voltage scaling"
- " in addition of frequency scaling. You should use "
- "that instead of p4-clockmod, if possible.\n");
- return speedstep_get_processor_frequency(SPEEDSTEP_PROCESSOR_PM);
- }
-
- if ((c->x86 == 0x06) && (c->x86_model == 0x0D)) {
- /* Pentium M (Dothan) */
- printk(KERN_WARNING PFX "Warning: Pentium M detected. "
- "The speedstep_centrino module offers voltage scaling"
- " in addition of frequency scaling. You should use "
- "that instead of p4-clockmod, if possible.\n");
- /* on P-4s, the TSC runs with constant frequency independent whether
- * throttling is active or not. */
- p4clockmod_driver.flags |= CPUFREQ_CONST_LOOPS;
- return speedstep_get_processor_frequency(SPEEDSTEP_PROCESSOR_PM);
+ if (c->x86 == 0x06) {
+ if (cpu_has(c, X86_FEATURE_EST))
+ printk(KERN_WARNING PFX "Warning: EST-capable CPU detected. "
+ "The acpi-cpufreq module offers voltage scaling"
+ " in addition of frequency scaling. You should use "
+ "that instead of p4-clockmod, if possible.\n");
+ switch (c->x86_model) {
+ case 0x0E: /* Core */
+ case 0x0F: /* Core Duo */
+ p4clockmod_driver.flags |= CPUFREQ_CONST_LOOPS;
+ return speedstep_get_processor_frequency(SPEEDSTEP_PROCESSOR_PCORE);
+ case 0x0D: /* Pentium M (Dothan) */
+ p4clockmod_driver.flags |= CPUFREQ_CONST_LOOPS;
+ /* fall through */
+ case 0x09: /* Pentium M (Banias) */
+ return speedstep_get_processor_frequency(SPEEDSTEP_PROCESSOR_PM);
+ }
}
if (c->x86 != 0xF) {
- printk(KERN_WARNING PFX "Unknown p4-clockmod-capable CPU. Please send an e-mail to <linux@brodo.de>\n");
+ printk(KERN_WARNING PFX "Unknown p4-clockmod-capable CPU. Please send an e-mail to <cpufreq@lists.linux.org.uk>\n");
return 0;
}
diff --git a/arch/i386/kernel/cpu/cpufreq/sc520_freq.c b/arch/i386/kernel/cpu/cpufreq/sc520_freq.c
index ef457d50f4a..b8fb4b521c6 100644
--- a/arch/i386/kernel/cpu/cpufreq/sc520_freq.c
+++ b/arch/i386/kernel/cpu/cpufreq/sc520_freq.c
@@ -153,6 +153,7 @@ static struct cpufreq_driver sc520_freq_driver = {
static int __init sc520_freq_init(void)
{
struct cpuinfo_x86 *c = cpu_data;
+ int err;
/* Test if we have the right hardware */
if(c->x86_vendor != X86_VENDOR_AMD ||
@@ -166,7 +167,11 @@ static int __init sc520_freq_init(void)
return -ENOMEM;
}
- return cpufreq_register_driver(&sc520_freq_driver);
+ err = cpufreq_register_driver(&sc520_freq_driver);
+ if (err)
+ iounmap(cpuctl);
+
+ return err;
}
diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c b/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c
index e8993baf3d1..f43b987f952 100644
--- a/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c
+++ b/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c
@@ -36,6 +36,7 @@
#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "speedstep-centrino", msg)
+#define INTEL_MSR_RANGE (0xffff)
struct cpu_id
{
@@ -379,6 +380,7 @@ static int centrino_cpu_early_init_acpi(void)
}
+#ifdef CONFIG_SMP
/*
* Some BIOSes do SW_ANY coordination internally, either set it up in hw
* or do it in BIOS firmware and won't inform about it to OS. If not
@@ -392,7 +394,6 @@ static int sw_any_bug_found(struct dmi_system_id *d)
return 0;
}
-
static struct dmi_system_id sw_any_bug_dmi_table[] = {
{
.callback = sw_any_bug_found,
@@ -405,7 +406,7 @@ static struct dmi_system_id sw_any_bug_dmi_table[] = {
},
{ }
};
-
+#endif
/*
* centrino_cpu_init_acpi - register with ACPI P-States library
@@ -463,8 +464,9 @@ static int centrino_cpu_init_acpi(struct cpufreq_policy *policy)
}
for (i=0; i<p->state_count; i++) {
- if (p->states[i].control != p->states[i].status) {
- dprintk("Different control (%llu) and status values (%llu)\n",
+ if ((p->states[i].control & INTEL_MSR_RANGE) !=
+ (p->states[i].status & INTEL_MSR_RANGE)) {
+ dprintk("Different MSR bits in control (%llu) and status (%llu)\n",
p->states[i].control, p->states[i].status);
result = -EINVAL;
goto err_unreg;
@@ -500,7 +502,7 @@ static int centrino_cpu_init_acpi(struct cpufreq_policy *policy)
}
for (i=0; i<p->state_count; i++) {
- centrino_model[cpu]->op_points[i].index = p->states[i].control;
+ centrino_model[cpu]->op_points[i].index = p->states[i].control & INTEL_MSR_RANGE;
centrino_model[cpu]->op_points[i].frequency = p->states[i].core_frequency * 1000;
dprintk("adding state %i with frequency %u and control value %04x\n",
i, centrino_model[cpu]->op_points[i].frequency, centrino_model[cpu]->op_points[i].index);
@@ -531,6 +533,9 @@ static int centrino_cpu_init_acpi(struct cpufreq_policy *policy)
/* notify BIOS that we exist */
acpi_processor_notify_smm(THIS_MODULE);
+ printk("speedstep-centrino with X86_SPEEDSTEP_CENTRINO_ACPI "
+ "config is deprecated.\n "
+ "Use X86_ACPI_CPUFREQ (acpi-cpufreq) instead.\n" );
return 0;
diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-lib.c b/arch/i386/kernel/cpu/cpufreq/speedstep-lib.c
index 4f46cac155c..d59277c0091 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 25366920.pdf */
+ switch (msr_lo & 0x07) {
+ case 5:
+ fsb = 100000;
+ break;
+ case 1:
+ fsb = 133333;
+ break;
+ case 3:
+ fsb = 166667;
+ 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));
+
+ return (msr_tmp * fsb);
+}
+
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:
diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-lib.h b/arch/i386/kernel/cpu/cpufreq/speedstep-lib.h
index b735429c50b..b11bcc608ca 100644
--- a/arch/i386/kernel/cpu/cpufreq/speedstep-lib.h
+++ b/arch/i386/kernel/cpu/cpufreq/speedstep-lib.h
@@ -22,6 +22,7 @@
* the speedstep_get_processor_frequency() call. */
#define SPEEDSTEP_PROCESSOR_PM 0xFFFFFF03 /* Pentium M */
#define SPEEDSTEP_PROCESSOR_P4D 0xFFFFFF04 /* desktop P4 */
+#define SPEEDSTEP_PROCESSOR_PCORE 0xFFFFFF05 /* Core */
/* speedstep states -- only two of them */
diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-smi.c b/arch/i386/kernel/cpu/cpufreq/speedstep-smi.c
index c28333d5364..ff0d8980611 100644
--- a/arch/i386/kernel/cpu/cpufreq/speedstep-smi.c
+++ b/arch/i386/kernel/cpu/cpufreq/speedstep-smi.c
@@ -360,9 +360,6 @@ static int __init speedstep_init(void)
case SPEEDSTEP_PROCESSOR_PIII_C:
case SPEEDSTEP_PROCESSOR_PIII_C_EARLY:
break;
- case SPEEDSTEP_PROCESSOR_P4M:
- printk(KERN_INFO "speedstep-smi: you're trying to use this cpufreq driver on a Pentium 4-based CPU. Most likely it will not work.\n");
- break;
default:
speedstep_processor = 0;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-24 08:41:06 +0000