* 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 infrerred from
+ * http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/30430.pdf
*/
#include <linux/kernel.h>
#define PFX "powernow-k8: "
#define BFX PFX "BIOS error: "
-#define VERSION "version 1.00.09b"
+#define VERSION "version 1.00.09e"
#include "powernow-k8.h"
/* serialize freq changes */
return 1550-vid*25;
}
-/* Return the vco fid for an input fid */
+/* 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) {
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);
}
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);
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);
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;
- 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);
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) {
+ while ((rvosteps > 0) && ((data->rvo + data->currvid) > reqvid)) {
if (data->currvid == 0) {
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, 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);
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;
|| (pst[j].fid & 1)
|| (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 PFX "two low fids - %d : 0x%x\n", j, pst[j].fid);
return -EINVAL;
}
if (pst[j].fid < lastfid)
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");
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);
}
/*
struct cpufreq_frequency_table *powernow_table;
if (acpi_processor_register_performance(&data->acpi_data, data->cpu)) {
- dprintk(KERN_DEBUG PFX "register performance failed\n");
+ dprintk("register performance failed\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;
}
u32 fid = data->acpi_data.states[i].control & FID_MASK;
u32 vid = (data->acpi_data.states[i].control >> VID_SHIFT) & VID_MASK;
- dprintk(KERN_INFO PFX " %d : fid 0x%x, vid 0x%x\n", i, fid, vid);
+ 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, ignoring\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 == 0x1f) {
- dprintk(KERN_INFO PFX "invalid vid %u, ignoring\n", vid);
+ dprintk("invalid vid %u, ignoring\n", vid);
powernow_table[i].frequency = CPUFREQ_ENTRY_INVALID;
continue;
}
goto err_out_mem;
}
- dprintk(KERN_INFO PFX "double low frequency table entry, ignoring it.\n");
+ dprintk("double low frequency table entry, ignoring it.\n");
powernow_table[i].frequency = CPUFREQ_ENTRY_INVALID;
continue;
} else
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:
int res;
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 are the lower 8 bits of the index we stored into
* the cpufreq frequency table in find_psb_table, vid are
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;
}
if ((fid < HI_FID_TABLE_BOTTOM) && (data->currfid < HI_FID_TABLE_BOTTOM)) {
- printk(KERN_ERR PFX
- "ignoring illegal change in lo freq table-%x to 0x%x\n",
+ printk("ignoring illegal change in lo freq table-%x to 0x%x\n",
data->currfid, fid);
return 1;
}
- dprintk(KERN_DEBUG PFX "cpu %d, changing to fid 0x%x, vid 0x%x\n",
- smp_processor_id(), fid, vid);
+ dprintk("cpu %d, changing to fid 0x%x, vid 0x%x\n",
+ smp_processor_id(), fid, vid);
freqs.cpu = data->cpu;
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)) {
goto err_out;
}
- dprintk(KERN_DEBUG PFX "targ: curr fid 0x%x, vid 0x%x\n",
+ dprintk("targ: curr fid 0x%x, vid 0x%x\n",
data->currfid, data->currvid);
if ((checkvid != data->currvid) || (checkfid != data->currfid)) {
+ (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);
+ 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",
+ printk("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;
/* 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);
}
git://git.onelab.eu / linux-2.6.git / blobdiff