/*
- * (c) 2003, 2004 Advanced Micro Devices, Inc.
+ * (c) 2003-2006 Advanced Micro Devices, Inc.
* Your use of this code is subject to the terms and conditions of the
* GNU general public license version 2. See "COPYING" or
* http://www.gnu.org/licenses/gpl.html
*
- * Support : paul.devriendt@amd.com
+ * Support : mark.langsdorf@amd.com
*
* Based on the powernow-k7.c module written by Dave Jones.
* (C) 2003 Dave Jones <davej@codemonkey.org.uk> on behalf of SuSE Labs
* Based upon datasheets & sample CPUs kindly provided by AMD.
*
* Valuable input gratefully received from Dave Jones, Pavel Machek,
- * Dominik Brodowski, and others.
+ * Dominik Brodowski, Jacob Shin, and others.
+ * Originally developed by Paul Devriendt.
* Processor information obtained from Chapter 9 (Power and Thermal Management)
* of the "BIOS and Kernel Developer's Guide for the AMD Athlon 64 and AMD
* Opteron Processors" available for download from www.amd.com
+ *
+ * Tables for specific CPUs can be inferred from
+ * http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/30430.pdf
*/
#include <linux/kernel.h>
#include <linux/cpufreq.h>
#include <linux/slab.h>
#include <linux/string.h>
+#include <linux/cpumask.h>
+#include <linux/sched.h> /* for current / set_cpus_allowed() */
#include <asm/msr.h>
#include <asm/io.h>
#include <asm/delay.h>
-#ifdef CONFIG_ACPI_PROCESSOR
+#ifdef CONFIG_X86_POWERNOW_K8_ACPI
#include <linux/acpi.h>
+#include <linux/mutex.h>
#include <acpi/processor.h>
#endif
#define PFX "powernow-k8: "
#define BFX PFX "BIOS error: "
-#define VERSION "version 1.00.08b"
+#define VERSION "version 2.00.00"
#include "powernow-k8.h"
/* serialize freq changes */
-static DECLARE_MUTEX(fidvid_sem);
+static DEFINE_MUTEX(fidvid_mutex);
static struct powernow_k8_data *powernow_data[NR_CPUS];
+static int cpu_family = CPU_OPTERON;
+
+#ifndef CONFIG_SMP
+static cpumask_t cpu_core_map[1];
+#endif
+
/* Return a frequency in MHz, given an input fid */
static u32 find_freq_from_fid(u32 fid)
{
return 800 + (fid * 100);
}
+
/* Return a frequency in KHz, given an input fid */
static u32 find_khz_freq_from_fid(u32 fid)
{
return 1000 * find_freq_from_fid(fid);
}
-/* Return a voltage in miliVolts, given an input vid */
-static u32 find_millivolts_from_vid(struct powernow_k8_data *data, u32 vid)
+/* Return a frequency in MHz, given an input fid and did */
+static u32 find_freq_from_fiddid(u32 fid, u32 did)
{
- return 1550-vid*25;
+ return 100 * (fid + 0x10) >> did;
}
-/* Return the vco fid for an input fid */
+static u32 find_khz_freq_from_fiddid(u32 fid, u32 did)
+{
+ return 1000 * find_freq_from_fiddid(fid, did);
+}
+
+static u32 find_fid_from_pstate(u32 pstate)
+{
+ u32 hi, lo;
+ rdmsr(MSR_PSTATE_DEF_BASE + pstate, lo, hi);
+ return lo & HW_PSTATE_FID_MASK;
+}
+
+static u32 find_did_from_pstate(u32 pstate)
+{
+ u32 hi, lo;
+ rdmsr(MSR_PSTATE_DEF_BASE + pstate, lo, hi);
+ return (lo & HW_PSTATE_DID_MASK) >> HW_PSTATE_DID_SHIFT;
+}
+
+/* Return the vco fid for an input fid
+ *
+ * Each "low" fid has corresponding "high" fid, and you can get to "low" fids
+ * only from corresponding high fids. This returns "high" fid corresponding to
+ * "low" one.
+ */
static u32 convert_fid_to_vco_fid(u32 fid)
{
- if (fid < HI_FID_TABLE_BOTTOM) {
+ if (fid < HI_FID_TABLE_BOTTOM)
return 8 + (2 * fid);
- } else {
+ else
return fid;
- }
}
/*
{
u32 lo, hi;
+ if (cpu_family == CPU_HW_PSTATE)
+ return 0;
+
rdmsr(MSR_FIDVID_STATUS, lo, hi);
return lo & MSR_S_LO_CHANGE_PENDING ? 1 : 0;
}
u32 lo, hi;
u32 i = 0;
- lo = MSR_S_LO_CHANGE_PENDING;
- while (lo & MSR_S_LO_CHANGE_PENDING) {
- if (i++ > 0x1000000) {
- printk(KERN_ERR PFX "detected change pending stuck\n");
+ if (cpu_family == CPU_HW_PSTATE) {
+ rdmsr(MSR_PSTATE_STATUS, lo, hi);
+ i = lo & HW_PSTATE_MASK;
+ rdmsr(MSR_PSTATE_DEF_BASE + i, lo, hi);
+ data->currfid = lo & HW_PSTATE_FID_MASK;
+ data->currdid = (lo & HW_PSTATE_DID_MASK) >> HW_PSTATE_DID_SHIFT;
+ return 0;
+ }
+ do {
+ if (i++ > 10000) {
+ dprintk("detected change pending stuck\n");
return 1;
}
rdmsr(MSR_FIDVID_STATUS, lo, hi);
- }
+ } while (lo & MSR_S_LO_CHANGE_PENDING);
data->currvid = hi & MSR_S_HI_CURRENT_VID;
data->currfid = lo & MSR_S_LO_CURRENT_FID;
fid = lo & MSR_S_LO_CURRENT_FID;
lo = fid | (vid << MSR_C_LO_VID_SHIFT);
hi = MSR_C_HI_STP_GNT_BENIGN;
- dprintk(PFX "cpu%d, init lo 0x%x, hi 0x%x\n", smp_processor_id(), lo, hi);
+ dprintk("cpu%d, init lo 0x%x, hi 0x%x\n", smp_processor_id(), lo, hi);
wrmsr(MSR_FIDVID_CTL, lo, hi);
}
{
u32 lo;
u32 savevid = data->currvid;
+ u32 i = 0;
if ((fid & INVALID_FID_MASK) || (data->currvid & INVALID_VID_MASK)) {
printk(KERN_ERR PFX "internal error - overflow on fid write\n");
lo = fid | (data->currvid << MSR_C_LO_VID_SHIFT) | MSR_C_LO_INIT_FID_VID;
- dprintk(KERN_DEBUG PFX "writing fid 0x%x, lo 0x%x, hi 0x%x\n",
+ dprintk("writing fid 0x%x, lo 0x%x, hi 0x%x\n",
fid, lo, data->plllock * PLL_LOCK_CONVERSION);
- wrmsr(MSR_FIDVID_CTL, lo, data->plllock * PLL_LOCK_CONVERSION);
-
- if (query_current_values_with_pending_wait(data))
- return 1;
+ do {
+ wrmsr(MSR_FIDVID_CTL, lo, data->plllock * PLL_LOCK_CONVERSION);
+ if (i++ > 100) {
+ printk(KERN_ERR PFX "Hardware error - pending bit very stuck - no further pstate changes possible\n");
+ return 1;
+ }
+ } while (query_current_values_with_pending_wait(data));
count_off_irt(data);
{
u32 lo;
u32 savefid = data->currfid;
+ int i = 0;
if ((data->currfid & INVALID_FID_MASK) || (vid & INVALID_VID_MASK)) {
printk(KERN_ERR PFX "internal error - overflow on vid write\n");
lo = data->currfid | (vid << MSR_C_LO_VID_SHIFT) | MSR_C_LO_INIT_FID_VID;
- dprintk(KERN_DEBUG PFX "writing vid 0x%x, lo 0x%x, hi 0x%x\n",
+ dprintk("writing vid 0x%x, lo 0x%x, hi 0x%x\n",
vid, lo, STOP_GRANT_5NS);
- wrmsr(MSR_FIDVID_CTL, lo, STOP_GRANT_5NS);
-
- if (query_current_values_with_pending_wait(data))
- return 1;
+ do {
+ wrmsr(MSR_FIDVID_CTL, lo, STOP_GRANT_5NS);
+ if (i++ > 100) {
+ printk(KERN_ERR PFX "internal error - pending bit very stuck - no further pstate changes possible\n");
+ return 1;
+ }
+ } while (query_current_values_with_pending_wait(data));
if (savefid != data->currfid) {
printk(KERN_ERR PFX "fid changed on vid trans, old 0x%x new 0x%x\n",
/*
* Reduce the vid by the max of step or reqvid.
* Decreasing vid codes represent increasing voltages:
- * vid of 0 is 1.550V, vid of 0x1e is 0.800V, vid of 0x1f is off.
+ * vid of 0 is 1.550V, vid of 0x1e is 0.800V, vid of VID_OFF is off.
*/
static int decrease_vid_code_by_step(struct powernow_k8_data *data, u32 reqvid, u32 step)
{
return 0;
}
-/* Change the fid and vid, by the 3 phases. */
+/* Change hardware pstate by single MSR write */
+static int transition_pstate(struct powernow_k8_data *data, u32 pstate)
+{
+ wrmsr(MSR_PSTATE_CTRL, pstate, 0);
+ data->currfid = find_fid_from_pstate(pstate);
+ return 0;
+}
+
+/* Change Opteron/Athlon64 fid and vid, by the 3 phases. */
static int transition_fid_vid(struct powernow_k8_data *data, u32 reqfid, u32 reqvid)
{
if (core_voltage_pre_transition(data, reqvid))
return 1;
}
- dprintk(KERN_INFO PFX "transitioned (cpu%d): new fid 0x%x, vid 0x%x\n",
+ dprintk("transitioned (cpu%d): new fid 0x%x, vid 0x%x\n",
smp_processor_id(), data->currfid, data->currvid);
return 0;
{
u32 rvosteps = data->rvo;
u32 savefid = data->currfid;
+ u32 maxvid, lo;
- dprintk(KERN_DEBUG PFX
- "ph1 (cpu%d): start, currfid 0x%x, currvid 0x%x, reqvid 0x%x, rvo 0x%x\n",
+ dprintk("ph1 (cpu%d): start, currfid 0x%x, currvid 0x%x, reqvid 0x%x, rvo 0x%x\n",
smp_processor_id(),
data->currfid, data->currvid, reqvid, data->rvo);
+ rdmsr(MSR_FIDVID_STATUS, lo, maxvid);
+ maxvid = 0x1f & (maxvid >> 16);
+ dprintk("ph1 maxvid=0x%x\n", maxvid);
+ if (reqvid < maxvid) /* lower numbers are higher voltages */
+ reqvid = maxvid;
+
while (data->currvid > reqvid) {
- dprintk(KERN_DEBUG PFX "ph1: curr 0x%x, req vid 0x%x\n",
+ dprintk("ph1: curr 0x%x, req vid 0x%x\n",
data->currvid, reqvid);
if (decrease_vid_code_by_step(data, reqvid, data->vidmvs))
return 1;
}
- while (rvosteps > 0) {
- if (data->currvid == 0) {
+ while ((rvosteps > 0) && ((data->rvo + data->currvid) > reqvid)) {
+ if (data->currvid == maxvid) {
rvosteps = 0;
} else {
- dprintk(KERN_DEBUG PFX
- "ph1: changing vid for rvo, req 0x%x\n",
+ dprintk("ph1: changing vid for rvo, req 0x%x\n",
data->currvid - 1);
if (decrease_vid_code_by_step(data, data->currvid - 1, 1))
return 1;
return 1;
}
- dprintk(KERN_DEBUG PFX "ph1 complete, currfid 0x%x, currvid 0x%x\n",
+ dprintk("ph1 complete, currfid 0x%x, currvid 0x%x\n",
data->currfid, data->currvid);
return 0;
/* Phase 2 - core frequency transition */
static int core_frequency_transition(struct powernow_k8_data *data, u32 reqfid)
{
- u32 vcoreqfid;
- u32 vcocurrfid;
- u32 vcofiddiff;
- u32 savevid = data->currvid;
+ u32 vcoreqfid, vcocurrfid, vcofiddiff, fid_interval, savevid = data->currvid;
if ((reqfid < HI_FID_TABLE_BOTTOM) && (data->currfid < HI_FID_TABLE_BOTTOM)) {
printk(KERN_ERR PFX "ph2: illegal lo-lo transition 0x%x 0x%x\n",
return 0;
}
- dprintk(KERN_DEBUG PFX
- "ph2 (cpu%d): starting, currfid 0x%x, currvid 0x%x, reqfid 0x%x\n",
+ dprintk("ph2 (cpu%d): starting, currfid 0x%x, currvid 0x%x, reqfid 0x%x\n",
smp_processor_id(),
data->currfid, data->currvid, reqfid);
: vcoreqfid - vcocurrfid;
while (vcofiddiff > 2) {
+ (data->currfid & 1) ? (fid_interval = 1) : (fid_interval = 2);
+
if (reqfid > data->currfid) {
if (data->currfid > LO_FID_TABLE_TOP) {
- if (write_new_fid(data, data->currfid + 2)) {
+ if (write_new_fid(data, data->currfid + fid_interval)) {
return 1;
}
} else {
}
}
} else {
- if (write_new_fid(data, data->currfid - 2))
+ if (write_new_fid(data, data->currfid - fid_interval))
return 1;
}
return 1;
}
- dprintk(KERN_DEBUG PFX "ph2 complete, currfid 0x%x, currvid 0x%x\n",
+ dprintk("ph2 complete, currfid 0x%x, currvid 0x%x\n",
data->currfid, data->currvid);
return 0;
u32 savefid = data->currfid;
u32 savereqvid = reqvid;
- dprintk(KERN_DEBUG PFX "ph3 (cpu%d): starting, currfid 0x%x, currvid 0x%x\n",
+ dprintk("ph3 (cpu%d): starting, currfid 0x%x, currvid 0x%x\n",
smp_processor_id(),
data->currfid, data->currvid);
return 1;
if (savereqvid != data->currvid) {
- dprintk(KERN_ERR PFX "ph3 failed, currvid 0x%x\n", data->currvid);
+ dprintk("ph3 failed, currvid 0x%x\n", data->currvid);
return 1;
}
if (savefid != data->currfid) {
- dprintk(KERN_ERR PFX "ph3 failed, currfid changed 0x%x\n",
+ dprintk("ph3 failed, currfid changed 0x%x\n",
data->currfid);
return 1;
}
- dprintk(KERN_DEBUG PFX "ph3 complete, currfid 0x%x, currvid 0x%x\n",
+ dprintk("ph3 complete, currfid 0x%x, currvid 0x%x\n",
data->currfid, data->currvid);
return 0;
oldmask = current->cpus_allowed;
set_cpus_allowed(current, cpumask_of_cpu(cpu));
- schedule();
if (smp_processor_id() != cpu) {
- printk(KERN_ERR "limiting to cpu %u failed\n", cpu);
+ printk(KERN_ERR PFX "limiting to cpu %u failed\n", cpu);
goto out;
}
goto out;
eax = cpuid_eax(CPUID_PROCESSOR_SIGNATURE);
- if ((eax & CPUID_XFAM_MOD) == ATHLON64_XFAM_MOD) {
- dprintk(KERN_DEBUG PFX "AMD Althon 64 Processor found\n");
- } else if ((eax & CPUID_XFAM_MOD) == OPTERON_XFAM_MOD) {
- dprintk(KERN_DEBUG PFX "AMD Opteron Processor found\n");
- } else {
- printk(KERN_INFO PFX
- "AMD Athlon 64 or AMD Opteron processor required\n");
+ if (((eax & CPUID_XFAM) != CPUID_XFAM_K8) &&
+ ((eax & CPUID_XFAM) < CPUID_XFAM_10H))
goto out;
- }
- eax = cpuid_eax(CPUID_GET_MAX_CAPABILITIES);
- if (eax < CPUID_FREQ_VOLT_CAPABILITIES) {
- printk(KERN_INFO PFX
- "No frequency change capabilities detected\n");
- goto out;
- }
+ if ((eax & CPUID_XFAM) == CPUID_XFAM_K8) {
+ if (((eax & CPUID_USE_XFAM_XMOD) != CPUID_USE_XFAM_XMOD) ||
+ ((eax & CPUID_XMOD) > CPUID_XMOD_REV_G)) {
+ printk(KERN_INFO PFX "Processor cpuid %x not supported\n", eax);
+ goto out;
+ }
- cpuid(CPUID_FREQ_VOLT_CAPABILITIES, &eax, &ebx, &ecx, &edx);
- if ((edx & P_STATE_TRANSITION_CAPABLE) != P_STATE_TRANSITION_CAPABLE) {
- printk(KERN_INFO PFX "Power state transitions not supported\n");
- goto out;
+ eax = cpuid_eax(CPUID_GET_MAX_CAPABILITIES);
+ if (eax < CPUID_FREQ_VOLT_CAPABILITIES) {
+ printk(KERN_INFO PFX
+ "No frequency change capabilities detected\n");
+ goto out;
+ }
+
+ cpuid(CPUID_FREQ_VOLT_CAPABILITIES, &eax, &ebx, &ecx, &edx);
+ if ((edx & P_STATE_TRANSITION_CAPABLE) != P_STATE_TRANSITION_CAPABLE) {
+ printk(KERN_INFO PFX "Power state transitions not supported\n");
+ goto out;
+ }
+ } else { /* must be a HW Pstate capable processor */
+ cpuid(CPUID_FREQ_VOLT_CAPABILITIES, &eax, &ebx, &ecx, &edx);
+ if ((edx & USE_HW_PSTATE) == USE_HW_PSTATE)
+ cpu_family = CPU_HW_PSTATE;
+ else
+ goto out;
}
rc = 1;
out:
set_cpus_allowed(current, oldmask);
- schedule();
return rc;
-
}
static int check_pst_table(struct powernow_k8_data *data, struct pst_s *pst, u8 maxvid)
printk(KERN_ERR BFX "maxvid exceeded with pstate %d\n", j);
return -ENODEV;
}
- if ((pst[j].fid > MAX_FID)
- || (pst[j].fid & 1)
- || (j && (pst[j].fid < HI_FID_TABLE_BOTTOM))) {
+ if (pst[j].fid > MAX_FID) {
+ printk(KERN_ERR BFX "maxfid exceeded with pstate %d\n", j);
+ return -ENODEV;
+ }
+ if (j && (pst[j].fid < HI_FID_TABLE_BOTTOM)) {
/* Only first fid is allowed to be in "low" range */
- printk(KERN_ERR PFX "fid %d invalid : 0x%x\n", j, pst[j].fid);
+ printk(KERN_ERR BFX "two low fids - %d : 0x%x\n", j, pst[j].fid);
return -EINVAL;
}
if (pst[j].fid < lastfid)
lastfid = pst[j].fid;
}
if (lastfid & 1) {
- printk(KERN_ERR PFX "lastfid invalid\n");
+ printk(KERN_ERR BFX "lastfid invalid\n");
return -EINVAL;
}
if (lastfid > LO_FID_TABLE_TOP)
- printk(KERN_INFO PFX "first fid not from lo freq table\n");
+ printk(KERN_INFO BFX "first fid not from lo freq table\n");
return 0;
}
{
int j;
for (j = 0; j < data->numps; j++) {
- printk(KERN_INFO PFX " %d : fid 0x%x (%d MHz), vid 0x%x (%d mV)\n", j,
- data->powernow_table[j].index & 0xff,
- data->powernow_table[j].frequency/1000,
- data->powernow_table[j].index >> 8,
- find_millivolts_from_vid(data, data->powernow_table[j].index >> 8));
+ if (data->powernow_table[j].frequency != CPUFREQ_ENTRY_INVALID) {
+ if (cpu_family == CPU_HW_PSTATE) {
+ printk(KERN_INFO PFX " %d : fid 0x%x gid 0x%x (%d MHz)\n", j, (data->powernow_table[j].index & 0xff00) >> 8,
+ (data->powernow_table[j].index & 0xff0000) >> 16,
+ data->powernow_table[j].frequency/1000);
+ } else {
+ printk(KERN_INFO PFX " %d : fid 0x%x (%d MHz), vid 0x%x\n", j,
+ data->powernow_table[j].index & 0xff,
+ data->powernow_table[j].frequency/1000,
+ data->powernow_table[j].index >> 8);
+ }
+ }
}
if (data->batps)
printk(KERN_INFO PFX "Only %d pstates on battery\n", data->batps);
printk(KERN_ERR PFX "no p states to transition\n");
return -ENODEV;
}
-
+
if (check_pst_table(data, pst, maxvid))
return -EINVAL;
return -EIO;
}
- dprintk(KERN_INFO PFX "cfid 0x%x, cvid 0x%x\n", data->currfid, data->currvid);
+ dprintk("cfid 0x%x, cvid 0x%x\n", data->currfid, data->currvid);
data->powernow_table = powernow_table;
print_basics(data);
if ((pst[j].fid==data->currfid) && (pst[j].vid==data->currvid))
return 0;
- dprintk(KERN_ERR PFX "currfid/vid do not match PST, ignoring\n");
+ dprintk("currfid/vid do not match PST, ignoring\n");
return 0;
}
unsigned int i;
u32 mvs;
u8 maxvid;
+ u32 cpst = 0;
+ u32 thiscpuid;
for (i = 0xc0000; i < 0xffff0; i += 0x10) {
/* Scan BIOS looking for the signature. */
if (memcmp(psb, PSB_ID_STRING, PSB_ID_STRING_LEN) != 0)
continue;
- dprintk(KERN_DEBUG PFX "found PSB header at 0x%p\n", psb);
+ dprintk("found PSB header at 0x%p\n", psb);
- dprintk(KERN_DEBUG PFX "table vers: 0x%x\n", psb->tableversion);
+ dprintk("table vers: 0x%x\n", psb->tableversion);
if (psb->tableversion != PSB_VERSION_1_4) {
- printk(KERN_INFO BFX "PSB table is not v1.4\n");
+ printk(KERN_ERR BFX "PSB table is not v1.4\n");
return -ENODEV;
}
- dprintk(KERN_DEBUG PFX "flags: 0x%x\n", psb->flags1);
+ dprintk("flags: 0x%x\n", psb->flags1);
if (psb->flags1) {
printk(KERN_ERR BFX "unknown flags\n");
return -ENODEV;
}
- data->vstable = psb->voltagestabilizationtime;
- dprintk(KERN_INFO PFX "voltage stabilization time: %d(*20us)\n", data->vstable);
+ data->vstable = psb->vstable;
+ dprintk("voltage stabilization time: %d(*20us)\n", data->vstable);
- dprintk(KERN_DEBUG PFX "flags2: 0x%x\n", psb->flags2);
+ dprintk("flags2: 0x%x\n", psb->flags2);
data->rvo = psb->flags2 & 3;
data->irt = ((psb->flags2) >> 2) & 3;
mvs = ((psb->flags2) >> 4) & 3;
data->vidmvs = 1 << mvs;
data->batps = ((psb->flags2) >> 6) & 3;
- dprintk(KERN_INFO PFX "ramp voltage offset: %d\n", data->rvo);
- dprintk(KERN_INFO PFX "isochronous relief time: %d\n", data->irt);
- dprintk(KERN_INFO PFX "maximum voltage step: %d - 0x%x\n", mvs, data->vidmvs);
+ dprintk("ramp voltage offset: %d\n", data->rvo);
+ dprintk("isochronous relief time: %d\n", data->irt);
+ dprintk("maximum voltage step: %d - 0x%x\n", mvs, data->vidmvs);
- dprintk(KERN_DEBUG PFX "numpst: 0x%x\n", psb->numpst);
- if (psb->numpst != 1) {
+ dprintk("numpst: 0x%x\n", psb->num_tables);
+ cpst = psb->num_tables;
+ if ((psb->cpuid == 0x00000fc0) || (psb->cpuid == 0x00000fe0) ){
+ thiscpuid = cpuid_eax(CPUID_PROCESSOR_SIGNATURE);
+ if ((thiscpuid == 0x00000fc0) || (thiscpuid == 0x00000fe0) ) {
+ cpst = 1;
+ }
+ }
+ if (cpst != 1) {
printk(KERN_ERR BFX "numpst must be 1\n");
return -ENODEV;
}
data->plllock = psb->plllocktime;
- dprintk(KERN_INFO PFX "plllocktime: 0x%x (units 1us)\n", psb->plllocktime);
- dprintk(KERN_INFO PFX "maxfid: 0x%x\n", psb->maxfid);
- dprintk(KERN_INFO PFX "maxvid: 0x%x\n", psb->maxvid);
+ dprintk("plllocktime: 0x%x (units 1us)\n", psb->plllocktime);
+ dprintk("maxfid: 0x%x\n", psb->maxfid);
+ dprintk("maxvid: 0x%x\n", psb->maxvid);
maxvid = psb->maxvid;
- data->numps = psb->numpstates;
- dprintk(KERN_INFO PFX "numpstates: 0x%x\n", data->numps);
+ data->numps = psb->numps;
+ dprintk("numpstates: 0x%x\n", data->numps);
return fill_powernow_table(data, (struct pst_s *)(psb+1), maxvid);
}
/*
* BIOS and Kernel Developer's Guide, which is available on
* www.amd.com
*/
- printk(KERN_ERR PFX "BIOS error - no PSB\n");
+ printk(KERN_ERR PFX "BIOS error - no PSB or ACPI _PSS objects\n");
return -ENODEV;
}
-#ifdef CONFIG_ACPI_PROCESSOR
+#ifdef CONFIG_X86_POWERNOW_K8_ACPI
static void powernow_k8_acpi_pst_values(struct powernow_k8_data *data, unsigned int index)
{
- if (!data->acpi_data.state_count)
+ if (!data->acpi_data.state_count || (cpu_family == CPU_HW_PSTATE))
return;
data->irt = (data->acpi_data.states[index].control >> IRT_SHIFT) & IRT_MASK;
data->rvo = (data->acpi_data.states[index].control >> RVO_SHIFT) & RVO_MASK;
+ data->exttype = (data->acpi_data.states[index].control >> EXT_TYPE_SHIFT) & EXT_TYPE_MASK;
data->plllock = (data->acpi_data.states[index].control >> PLL_L_SHIFT) & PLL_L_MASK;
data->vidmvs = 1 << ((data->acpi_data.states[index].control >> MVS_SHIFT) & MVS_MASK);
data->vstable = (data->acpi_data.states[index].control >> VST_SHIFT) & VST_MASK;
static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
{
- int i;
- int cntlofreq = 0;
struct cpufreq_frequency_table *powernow_table;
+ int ret_val;
if (acpi_processor_register_performance(&data->acpi_data, data->cpu)) {
- dprintk(KERN_DEBUG PFX "register performance failed\n");
+ dprintk("register performance failed: bad ACPI data\n");
return -EIO;
}
/* verify the data contained in the ACPI structures */
if (data->acpi_data.state_count <= 1) {
- dprintk(KERN_DEBUG PFX "No ACPI P-States\n");
+ dprintk("No ACPI P-States\n");
goto err_out;
}
if ((data->acpi_data.control_register.space_id != ACPI_ADR_SPACE_FIXED_HARDWARE) ||
(data->acpi_data.status_register.space_id != ACPI_ADR_SPACE_FIXED_HARDWARE)) {
- dprintk(KERN_DEBUG PFX "Invalid control/status registers\n");
+ dprintk("Invalid control/status registers (%x - %x)\n",
+ data->acpi_data.control_register.space_id,
+ data->acpi_data.status_register.space_id);
goto err_out;
}
powernow_table = kmalloc((sizeof(struct cpufreq_frequency_table)
* (data->acpi_data.state_count + 1)), GFP_KERNEL);
if (!powernow_table) {
- dprintk(KERN_ERR PFX "powernow_table memory alloc failure\n");
+ dprintk("powernow_table memory alloc failure\n");
goto err_out;
}
+ if (cpu_family == CPU_HW_PSTATE)
+ ret_val = fill_powernow_table_pstate(data, powernow_table);
+ else
+ ret_val = fill_powernow_table_fidvid(data, powernow_table);
+ if (ret_val)
+ goto err_out_mem;
+
+ powernow_table[data->acpi_data.state_count].frequency = CPUFREQ_TABLE_END;
+ powernow_table[data->acpi_data.state_count].index = 0;
+ data->powernow_table = powernow_table;
+
+ /* fill in data */
+ data->numps = data->acpi_data.state_count;
+ print_basics(data);
+ powernow_k8_acpi_pst_values(data, 0);
+
+ /* notify BIOS that we exist */
+ acpi_processor_notify_smm(THIS_MODULE);
+
+ return 0;
+
+err_out_mem:
+ kfree(powernow_table);
+
+err_out:
+ acpi_processor_unregister_performance(&data->acpi_data, data->cpu);
+
+ /* data->acpi_data.state_count informs us at ->exit() whether ACPI was used */
+ data->acpi_data.state_count = 0;
+
+ return -ENODEV;
+}
+
+static int fill_powernow_table_pstate(struct powernow_k8_data *data, struct cpufreq_frequency_table *powernow_table)
+{
+ int i;
+
for (i = 0; i < data->acpi_data.state_count; i++) {
- u32 fid = data->acpi_data.states[i].control & FID_MASK;
- u32 vid = (data->acpi_data.states[i].control >> VID_SHIFT) & VID_MASK;
+ u32 index;
+ u32 hi = 0, lo = 0;
+ u32 fid;
+ u32 did;
+
+ index = data->acpi_data.states[i].control & HW_PSTATE_MASK;
+ if (index > MAX_HW_PSTATE) {
+ printk(KERN_ERR PFX "invalid pstate %d - bad value %d.\n", i, index);
+ printk(KERN_ERR PFX "Please report to BIOS manufacturer\n");
+ }
+ rdmsr(MSR_PSTATE_DEF_BASE + index, lo, hi);
+ if (!(hi & HW_PSTATE_VALID_MASK)) {
+ dprintk("invalid pstate %d, ignoring\n", index);
+ powernow_table[i].frequency = CPUFREQ_ENTRY_INVALID;
+ continue;
+ }
+
+ fid = lo & HW_PSTATE_FID_MASK;
+ did = (lo & HW_PSTATE_DID_MASK) >> HW_PSTATE_DID_SHIFT;
+
+ dprintk(" %d : fid 0x%x, did 0x%x\n", index, fid, did);
- dprintk(KERN_INFO PFX " %d : fid 0x%x, vid 0x%x\n", i, fid, vid);
+ powernow_table[i].index = index | (fid << HW_FID_INDEX_SHIFT) | (did << HW_DID_INDEX_SHIFT);
+
+ powernow_table[i].frequency = find_khz_freq_from_fiddid(fid, did);
+
+ if (powernow_table[i].frequency != (data->acpi_data.states[i].core_frequency * 1000)) {
+ printk(KERN_INFO PFX "invalid freq entries %u kHz vs. %u kHz\n",
+ powernow_table[i].frequency,
+ (unsigned int) (data->acpi_data.states[i].core_frequency * 1000));
+ powernow_table[i].frequency = CPUFREQ_ENTRY_INVALID;
+ continue;
+ }
+ }
+ return 0;
+}
+
+static int fill_powernow_table_fidvid(struct powernow_k8_data *data, struct cpufreq_frequency_table *powernow_table)
+{
+ int i;
+ int cntlofreq = 0;
+ for (i = 0; i < data->acpi_data.state_count; i++) {
+ u32 fid;
+ u32 vid;
+
+ if (data->exttype) {
+ fid = data->acpi_data.states[i].status & EXT_FID_MASK;
+ vid = (data->acpi_data.states[i].status >> VID_SHIFT) & EXT_VID_MASK;
+ } else {
+ fid = data->acpi_data.states[i].control & FID_MASK;
+ vid = (data->acpi_data.states[i].control >> VID_SHIFT) & VID_MASK;
+ }
+
+ dprintk(" %d : fid 0x%x, vid 0x%x\n", i, fid, vid);
powernow_table[i].index = fid; /* lower 8 bits */
powernow_table[i].index |= (vid << 8); /* upper 8 bits */
/* verify frequency is OK */
if ((powernow_table[i].frequency > (MAX_FREQ * 1000)) ||
(powernow_table[i].frequency < (MIN_FREQ * 1000))) {
- dprintk(KERN_INFO PFX "invalid freq %u kHz\n", powernow_table[i].frequency);
+ dprintk("invalid freq %u kHz, ignoring\n", powernow_table[i].frequency);
+ powernow_table[i].frequency = CPUFREQ_ENTRY_INVALID;
+ continue;
+ }
+
+ /* verify voltage is OK - BIOSs are using "off" to indicate invalid */
+ if (vid == VID_OFF) {
+ dprintk("invalid vid %u, ignoring\n", vid);
powernow_table[i].frequency = CPUFREQ_ENTRY_INVALID;
continue;
}
/* verify only 1 entry from the lo frequency table */
- if ((fid < HI_FID_TABLE_BOTTOM) && (cntlofreq++)) {
- printk(KERN_ERR PFX "Too many lo freq table entries\n");
- goto err_out;
+ if (fid < HI_FID_TABLE_BOTTOM) {
+ if (cntlofreq) {
+ /* if both entries are the same, ignore this one ... */
+ if ((powernow_table[i].frequency != powernow_table[cntlofreq].frequency) ||
+ (powernow_table[i].index != powernow_table[cntlofreq].index)) {
+ printk(KERN_ERR PFX "Too many lo freq table entries\n");
+ return 1;
+ }
+
+ dprintk("double low frequency table entry, ignoring it.\n");
+ powernow_table[i].frequency = CPUFREQ_ENTRY_INVALID;
+ continue;
+ } else
+ cntlofreq = i;
}
-
+
if (powernow_table[i].frequency != (data->acpi_data.states[i].core_frequency * 1000)) {
printk(KERN_INFO PFX "invalid freq entries %u kHz vs. %u kHz\n",
powernow_table[i].frequency,
continue;
}
}
-
- powernow_table[data->acpi_data.state_count].frequency = CPUFREQ_TABLE_END;
- powernow_table[data->acpi_data.state_count].index = 0;
- data->powernow_table = powernow_table;
-
- /* fill in data */
- data->numps = data->acpi_data.state_count;
- print_basics(data);
- powernow_k8_acpi_pst_values(data, 0);
return 0;
-err_out:
- acpi_processor_unregister_performance(&data->acpi_data, data->cpu);
-
- /* data->acpi_data.state_count informs us at ->exit() whether ACPI was used */
- data->acpi_data.state_count = 0;
-
- return -ENODEV;
}
static void powernow_k8_cpu_exit_acpi(struct powernow_k8_data *data)
#endif /* CONFIG_X86_POWERNOW_K8_ACPI */
/* Take a frequency, and issue the fid/vid transition command */
-static int transition_frequency(struct powernow_k8_data *data, unsigned int index)
+static int transition_frequency_fidvid(struct powernow_k8_data *data, unsigned int index)
{
- u32 fid;
- u32 vid;
- int res;
+ u32 fid = 0;
+ u32 vid = 0;
+ int res, i;
struct cpufreq_freqs freqs;
- dprintk(KERN_DEBUG PFX "cpu %d transition to index %u\n",
- smp_processor_id(), index );
+ dprintk("cpu %d transition to index %u\n", smp_processor_id(), index);
+ /* fid/vid correctness check for k8 */
/* fid are the lower 8 bits of the index we stored into
- * the cpufreq frequency table in find_psb_table, vid are
- * the upper 8 bits.
+ * the cpufreq frequency table in find_psb_table, vid
+ * are the upper 8 bits.
*/
-
fid = data->powernow_table[index].index & 0xFF;
vid = (data->powernow_table[index].index & 0xFF00) >> 8;
- dprintk(KERN_DEBUG PFX "table matched fid 0x%x, giving vid 0x%x\n",
- fid, vid);
+ dprintk("table matched fid 0x%x, giving vid 0x%x\n", fid, vid);
if (query_current_values_with_pending_wait(data))
return 1;
if ((data->currvid == vid) && (data->currfid == fid)) {
- dprintk(KERN_DEBUG PFX
- "target matches current values (fid 0x%x, vid 0x%x)\n",
+ dprintk("target matches current values (fid 0x%x, vid 0x%x)\n",
fid, vid);
return 0;
}
return 1;
}
- dprintk(KERN_DEBUG PFX "cpu %d, changing to fid 0x%x, vid 0x%x\n",
- smp_processor_id(), fid, vid);
-
- freqs.cpu = data->cpu;
-
+ dprintk("cpu %d, changing to fid 0x%x, vid 0x%x\n",
+ smp_processor_id(), fid, vid);
freqs.old = find_khz_freq_from_fid(data->currfid);
freqs.new = find_khz_freq_from_fid(fid);
- cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
- down(&fidvid_sem);
- res = transition_fid_vid(data, fid, vid);
- up(&fidvid_sem);
+ for_each_cpu_mask(i, *(data->available_cores)) {
+ freqs.cpu = i;
+ cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
+ }
+ res = transition_fid_vid(data, fid, vid);
freqs.new = find_khz_freq_from_fid(data->currfid);
- cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
+ for_each_cpu_mask(i, *(data->available_cores)) {
+ freqs.cpu = i;
+ cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
+ }
+ return res;
+}
+
+/* Take a frequency, and issue the hardware pstate transition command */
+static int transition_frequency_pstate(struct powernow_k8_data *data, unsigned int index)
+{
+ u32 fid = 0;
+ u32 did = 0;
+ u32 pstate = 0;
+ int res, i;
+ struct cpufreq_freqs freqs;
+
+ dprintk("cpu %d transition to index %u\n", smp_processor_id(), index);
+
+ /* get fid did for hardware pstate transition */
+ pstate = index & HW_PSTATE_MASK;
+ if (pstate > MAX_HW_PSTATE)
+ return 0;
+ fid = (index & HW_FID_INDEX_MASK) >> HW_FID_INDEX_SHIFT;
+ did = (index & HW_DID_INDEX_MASK) >> HW_DID_INDEX_SHIFT;
+ freqs.old = find_khz_freq_from_fiddid(data->currfid, data->currdid);
+ freqs.new = find_khz_freq_from_fiddid(fid, did);
+
+ for_each_cpu_mask(i, *(data->available_cores)) {
+ freqs.cpu = i;
+ cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
+ }
+
+ res = transition_pstate(data, pstate);
+ data->currfid = find_fid_from_pstate(pstate);
+ data->currdid = find_did_from_pstate(pstate);
+ freqs.new = find_khz_freq_from_fiddid(data->currfid, data->currdid);
+
+ for_each_cpu_mask(i, *(data->available_cores)) {
+ freqs.cpu = i;
+ cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
+ }
return res;
}
{
cpumask_t oldmask = CPU_MASK_ALL;
struct powernow_k8_data *data = powernow_data[pol->cpu];
- u32 checkfid = data->currfid;
- u32 checkvid = data->currvid;
+ u32 checkfid;
+ u32 checkvid;
unsigned int newstate;
int ret = -EIO;
+ if (!data)
+ return -EINVAL;
+
+ checkfid = data->currfid;
+ checkvid = data->currvid;
+
/* only run on specific CPU from here on */
oldmask = current->cpus_allowed;
set_cpus_allowed(current, cpumask_of_cpu(pol->cpu));
- schedule();
if (smp_processor_id() != pol->cpu) {
- printk(KERN_ERR "limiting to cpu %u failed\n", pol->cpu);
- goto sched_out;
+ printk(KERN_ERR PFX "limiting to cpu %u failed\n", pol->cpu);
+ goto err_out;
}
- /* from this point, do not exit without restoring preempt and cpu */
- preempt_disable();
-
if (pending_bit_stuck()) {
printk(KERN_ERR PFX "failing targ, change pending bit set\n");
goto err_out;
}
- dprintk(KERN_DEBUG PFX "targ: cpu %d, %d kHz, min %d, max %d, relation %d\n",
+ dprintk("targ: cpu %d, %d kHz, min %d, max %d, relation %d\n",
pol->cpu, targfreq, pol->min, pol->max, relation);
- if (query_current_values_with_pending_wait(data)) {
- ret = -EIO;
+ if (query_current_values_with_pending_wait(data))
goto err_out;
- }
- dprintk(KERN_DEBUG PFX "targ: curr fid 0x%x, vid 0x%x\n",
+ if (cpu_family == CPU_HW_PSTATE)
+ dprintk("targ: curr fid 0x%x, did 0x%x\n",
+ data->currfid, data->currvid);
+ else {
+ dprintk("targ: curr fid 0x%x, vid 0x%x\n",
data->currfid, data->currvid);
- if ((checkvid != data->currvid) || (checkfid != data->currfid)) {
- printk(KERN_ERR PFX
- "error - out of sync, fid 0x%x 0x%x, vid 0x%x 0x%x\n",
- checkfid, data->currfid, checkvid, data->currvid);
+ if ((checkvid != data->currvid) || (checkfid != data->currfid)) {
+ printk(KERN_INFO PFX
+ "error - out of sync, fix 0x%x 0x%x, vid 0x%x 0x%x\n",
+ checkfid, data->currfid, checkvid, data->currvid);
+ }
}
if (cpufreq_frequency_table_target(pol, data->powernow_table, targfreq, relation, &newstate))
goto err_out;
+ mutex_lock(&fidvid_mutex);
+
powernow_k8_acpi_pst_values(data, newstate);
- if (transition_frequency(data, newstate)) {
+ if (cpu_family == CPU_HW_PSTATE)
+ ret = transition_frequency_pstate(data, newstate);
+ else
+ ret = transition_frequency_fidvid(data, newstate);
+ if (ret) {
printk(KERN_ERR PFX "transition frequency failed\n");
ret = 1;
+ mutex_unlock(&fidvid_mutex);
goto err_out;
}
+ mutex_unlock(&fidvid_mutex);
- pol->cur = find_khz_freq_from_fid(data->currfid);
+ if (cpu_family == CPU_HW_PSTATE)
+ pol->cur = find_khz_freq_from_fiddid(data->currfid, data->currdid);
+ else
+ pol->cur = find_khz_freq_from_fid(data->currfid);
ret = 0;
err_out:
- preempt_enable_no_resched();
-sched_out:
set_cpus_allowed(current, oldmask);
- schedule();
-
return ret;
}
{
struct powernow_k8_data *data = powernow_data[pol->cpu];
+ if (!data)
+ return -EINVAL;
+
return cpufreq_frequency_table_verify(pol, data->powernow_table);
}
/* per CPU init entry point to the driver */
-static int __init powernowk8_cpu_init(struct cpufreq_policy *pol)
+static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
{
struct powernow_k8_data *data;
cpumask_t oldmask = CPU_MASK_ALL;
int rc;
+ if (!cpu_online(pol->cpu))
+ return -ENODEV;
+
if (!check_supported_cpu(pol->cpu))
return -ENODEV;
- data = kmalloc(sizeof(struct powernow_k8_data), GFP_KERNEL);
+ data = kzalloc(sizeof(struct powernow_k8_data), GFP_KERNEL);
if (!data) {
printk(KERN_ERR PFX "unable to alloc powernow_k8_data");
return -ENOMEM;
}
- memset(data,0,sizeof(struct powernow_k8_data));
data->cpu = pol->cpu;
* Use the PSB BIOS structure. This is only availabe on
* an UP version, and is deprecated by AMD.
*/
-
- if (pol->cpu != 0) {
- printk(KERN_ERR PFX "init not cpu 0\n");
+ if (num_online_cpus() != 1) {
+ printk(KERN_ERR PFX "MP systems not supported by PSB BIOS structure\n");
kfree(data);
return -ENODEV;
}
- if ((num_online_cpus() != 1) || (num_possible_cpus() != 1)) {
- printk(KERN_INFO PFX "MP systems not supported by PSB BIOS structure\n");
+ if (pol->cpu != 0) {
+ printk(KERN_ERR PFX "No _PSS objects for CPU other than CPU0\n");
kfree(data);
- return 0;
+ return -ENODEV;
}
rc = find_psb_table(data);
if (rc) {
/* only run on specific CPU from here on */
oldmask = current->cpus_allowed;
set_cpus_allowed(current, cpumask_of_cpu(pol->cpu));
- schedule();
if (smp_processor_id() != pol->cpu) {
- printk(KERN_ERR "limiting to cpu %u failed\n", pol->cpu);
+ printk(KERN_ERR PFX "limiting to cpu %u failed\n", pol->cpu);
goto err_out;
}
if (query_current_values_with_pending_wait(data))
goto err_out;
- fidvid_msr_init();
+ if (cpu_family == CPU_OPTERON)
+ fidvid_msr_init();
/* run on any CPU again */
set_cpus_allowed(current, oldmask);
- schedule();
pol->governor = CPUFREQ_DEFAULT_GOVERNOR;
+ if (cpu_family == CPU_HW_PSTATE)
+ pol->cpus = cpumask_of_cpu(pol->cpu);
+ else
+ pol->cpus = cpu_core_map[pol->cpu];
+ data->available_cores = &(pol->cpus);
- /* Take a crude guess here.
+ /* Take a crude guess here.
* That guess was in microseconds, so multiply with 1000 */
pol->cpuinfo.transition_latency = (((data->rvo + 8) * data->vstable * VST_UNITS_20US)
+ (3 * (1 << data->irt) * 10)) * 1000;
- pol->cur = find_khz_freq_from_fid(data->currfid);
- dprintk(KERN_DEBUG PFX "policy current frequency %d kHz\n", pol->cur);
+ if (cpu_family == CPU_HW_PSTATE)
+ pol->cur = find_khz_freq_from_fiddid(data->currfid, data->currdid);
+ else
+ pol->cur = find_khz_freq_from_fid(data->currfid);
+ dprintk("policy current frequency %d kHz\n", pol->cur);
/* min/max the cpu is capable of */
if (cpufreq_frequency_table_cpuinfo(pol, data->powernow_table)) {
printk(KERN_ERR PFX "invalid powernow_table\n");
+ powernow_k8_cpu_exit_acpi(data);
kfree(data->powernow_table);
kfree(data);
return -EINVAL;
cpufreq_frequency_table_get_attr(data->powernow_table, pol->cpu);
- printk(KERN_INFO PFX "cpu_init done, current fid 0x%x, vid 0x%x\n",
- data->currfid, data->currvid);
+ if (cpu_family == CPU_HW_PSTATE)
+ dprintk("cpu_init done, current fid 0x%x, did 0x%x\n",
+ data->currfid, data->currdid);
+ else
+ dprintk("cpu_init done, current fid 0x%x, vid 0x%x\n",
+ data->currfid, data->currvid);
powernow_data[pol->cpu] = data;
err_out:
set_cpus_allowed(current, oldmask);
- schedule();
+ powernow_k8_cpu_exit_acpi(data);
kfree(data);
return -ENODEV;
}
-static int __exit powernowk8_cpu_exit (struct cpufreq_policy *pol)
+static int __devexit powernowk8_cpu_exit (struct cpufreq_policy *pol)
{
struct powernow_k8_data *data = powernow_data[pol->cpu];
return 0;
}
+static unsigned int powernowk8_get (unsigned int cpu)
+{
+ struct powernow_k8_data *data;
+ cpumask_t oldmask = current->cpus_allowed;
+ unsigned int khz = 0;
+
+ data = powernow_data[first_cpu(cpu_core_map[cpu])];
+
+ if (!data)
+ return -EINVAL;
+
+ set_cpus_allowed(current, cpumask_of_cpu(cpu));
+ if (smp_processor_id() != cpu) {
+ printk(KERN_ERR PFX "limiting to CPU %d failed in powernowk8_get\n", cpu);
+ set_cpus_allowed(current, oldmask);
+ return 0;
+ }
+
+ if (query_current_values_with_pending_wait(data))
+ goto out;
+
+ khz = find_khz_freq_from_fid(data->currfid);
+
+out:
+ set_cpus_allowed(current, oldmask);
+ return khz;
+}
+
static struct freq_attr* powernow_k8_attr[] = {
&cpufreq_freq_attr_scaling_available_freqs,
NULL,
.verify = powernowk8_verify,
.target = powernowk8_target,
.init = powernowk8_cpu_init,
- .exit = powernowk8_cpu_exit,
+ .exit = __devexit_p(powernowk8_cpu_exit),
+ .get = powernowk8_get,
.name = "powernow-k8",
.owner = THIS_MODULE,
.attr = powernow_k8_attr,
};
/* driver entry point for init */
-static int __init powernowk8_init(void)
+static int __cpuinit powernowk8_init(void)
{
unsigned int i, supported_cpus = 0;
- for (i=0; i<NR_CPUS; i++) {
- if (!cpu_online(i))
- continue;
+ for_each_online_cpu(i) {
if (check_supported_cpu(i))
supported_cpus++;
}
if (supported_cpus == num_online_cpus()) {
- printk(KERN_INFO PFX "Found %d AMD Athlon 64 / Opteron processors (" VERSION ")\n",
- supported_cpus);
+ printk(KERN_INFO PFX "Found %d %s "
+ "processors (" VERSION ")\n", supported_cpus,
+ boot_cpu_data.x86_model_id);
return cpufreq_register_driver(&cpufreq_amd64_driver);
}
/* driver entry point for term */
static void __exit powernowk8_exit(void)
{
- dprintk(KERN_INFO PFX "exit\n");
+ dprintk("exit\n");
cpufreq_unregister_driver(&cpufreq_amd64_driver);
}
-MODULE_AUTHOR("Paul Devriendt <paul.devriendt@amd.com>");
+MODULE_AUTHOR("Paul Devriendt <paul.devriendt@amd.com> and Mark Langsdorf <mark.langsdorf@amd.com>");
MODULE_DESCRIPTION("AMD Athlon 64 and Opteron processor frequency driver.");
MODULE_LICENSE("GPL");
git://git.onelab.eu / linux-2.6.git / blobdiff