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Diffstat (limited to 'arch/x86/kernel/cpu/cpufreq/powernow-k8.c')
-rw-r--r--arch/x86/kernel/cpu/cpufreq/powernow-k8.c57
1 files changed, 34 insertions, 23 deletions
diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
index 4709ead2db5..cf52215d9eb 100644
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
@@ -649,6 +649,20 @@ static void print_basics(struct powernow_k8_data *data)
data->batps);
}
+static u32 freq_from_fid_did(u32 fid, u32 did)
+{
+ u32 mhz = 0;
+
+ if (boot_cpu_data.x86 == 0x10)
+ mhz = (100 * (fid + 0x10)) >> did;
+ else if (boot_cpu_data.x86 == 0x11)
+ mhz = (100 * (fid + 8)) >> did;
+ else
+ BUG();
+
+ return mhz * 1000;
+}
+
static int fill_powernow_table(struct powernow_k8_data *data,
struct pst_s *pst, u8 maxvid)
{
@@ -821,7 +835,7 @@ static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
{
struct cpufreq_frequency_table *powernow_table;
int ret_val = -ENODEV;
- acpi_integer space_id;
+ acpi_integer control, status;
if (acpi_processor_register_performance(&data->acpi_data, data->cpu)) {
dprintk("register performance failed: bad ACPI data\n");
@@ -834,12 +848,13 @@ static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
goto err_out;
}
- space_id = data->acpi_data.control_register.space_id;
- if ((space_id != ACPI_ADR_SPACE_FIXED_HARDWARE) ||
- (space_id != ACPI_ADR_SPACE_FIXED_HARDWARE)) {
+ control = data->acpi_data.control_register.space_id;
+ status = data->acpi_data.status_register.space_id;
+
+ if ((control != ACPI_ADR_SPACE_FIXED_HARDWARE) ||
+ (status != ACPI_ADR_SPACE_FIXED_HARDWARE)) {
dprintk("Invalid control/status registers (%x - %x)\n",
- data->acpi_data.control_register.space_id,
- space_id);
+ control, status);
goto err_out;
}
@@ -872,7 +887,7 @@ static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
/* notify BIOS that we exist */
acpi_processor_notify_smm(THIS_MODULE);
- if (!alloc_cpumask_var(&data->acpi_data.shared_cpu_map, GFP_KERNEL)) {
+ if (!zalloc_cpumask_var(&data->acpi_data.shared_cpu_map, GFP_KERNEL)) {
printk(KERN_ERR PFX
"unable to alloc powernow_k8_data cpumask\n");
ret_val = -ENOMEM;
@@ -923,8 +938,13 @@ static int fill_powernow_table_pstate(struct powernow_k8_data *data,
powernow_table[i].index = index;
- powernow_table[i].frequency =
- data->acpi_data.states[i].core_frequency * 1000;
+ /* Frequency may be rounded for these */
+ if (boot_cpu_data.x86 == 0x10 || boot_cpu_data.x86 == 0x11) {
+ powernow_table[i].frequency =
+ freq_from_fid_did(lo & 0x3f, (lo >> 6) & 7);
+ } else
+ powernow_table[i].frequency =
+ data->acpi_data.states[i].core_frequency * 1000;
}
return 0;
}
@@ -1215,13 +1235,16 @@ static int powernowk8_verify(struct cpufreq_policy *pol)
return cpufreq_frequency_table_verify(pol, data->powernow_table);
}
+static const char ACPI_PSS_BIOS_BUG_MSG[] =
+ KERN_ERR FW_BUG PFX "No compatible ACPI _PSS objects found.\n"
+ KERN_ERR FW_BUG PFX "Try again with latest BIOS.\n";
+
/* per CPU init entry point to the driver */
static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
{
struct powernow_k8_data *data;
cpumask_t oldmask;
int rc;
- static int print_once;
if (!cpu_online(pol->cpu))
return -ENODEV;
@@ -1244,19 +1267,7 @@ static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
* an UP version, and is deprecated by AMD.
*/
if (num_online_cpus() != 1) {
- /*
- * Replace this one with print_once as soon as such a
- * thing gets introduced
- */
- if (!print_once) {
- WARN_ONCE(1, KERN_ERR FW_BUG PFX "Your BIOS "
- "does not provide ACPI _PSS objects "
- "in a way that Linux understands. "
- "Please report this to the Linux ACPI"
- " maintainers and complain to your "
- "BIOS vendor.\n");
- print_once++;
- }
+ printk_once(ACPI_PSS_BIOS_BUG_MSG);
goto err_out;
}
if (pol->cpu != 0) {