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-rw-r--r--arch/i386/kernel/cpu/amd.c12
-rw-r--r--arch/i386/kernel/cpu/common.c4
-rw-r--r--arch/i386/kernel/cpu/cpufreq/Kconfig14
-rw-r--r--arch/i386/kernel/cpu/cpufreq/Makefile1
-rw-r--r--arch/i386/kernel/cpu/cpufreq/longhaul.c58
-rw-r--r--arch/i386/kernel/cpu/cpufreq/powernow-k7.c11
-rw-r--r--arch/i386/kernel/cpu/cpufreq/powernow-k8.c113
-rw-r--r--arch/i386/kernel/cpu/cpufreq/powernow-k8.h15
-rw-r--r--arch/i386/kernel/cpu/cpufreq/sc520_freq.c186
-rw-r--r--arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c6
-rw-r--r--arch/i386/kernel/cpu/cpufreq/speedstep-lib.c6
-rw-r--r--arch/i386/kernel/cpu/cpufreq/speedstep-smi.c3
-rw-r--r--arch/i386/kernel/cpu/intel_cacheinfo.c2
-rw-r--r--arch/i386/kernel/setup.c2
-rw-r--r--arch/i386/kernel/smpboot.c5
-rw-r--r--arch/i386/kernel/timers/common.c6
-rw-r--r--arch/i386/kernel/timers/timer_tsc.c20
17 files changed, 406 insertions, 58 deletions
diff --git a/arch/i386/kernel/cpu/amd.c b/arch/i386/kernel/cpu/amd.c
index 16dbc4151be4..73aeaf5a9d4e 100644
--- a/arch/i386/kernel/cpu/amd.c
+++ b/arch/i386/kernel/cpu/amd.c
@@ -24,9 +24,6 @@ __asm__(".align 4\nvide: ret");
24 24
25static void __init init_amd(struct cpuinfo_x86 *c) 25static void __init init_amd(struct cpuinfo_x86 *c)
26{ 26{
27#ifdef CONFIG_X86_SMP
28 int cpu = c == &boot_cpu_data ? 0 : c - cpu_data;
29#endif
30 u32 l, h; 27 u32 l, h;
31 int mbytes = num_physpages >> (20-PAGE_SHIFT); 28 int mbytes = num_physpages >> (20-PAGE_SHIFT);
32 int r; 29 int r;
@@ -198,14 +195,19 @@ static void __init init_amd(struct cpuinfo_x86 *c)
198 c->x86_num_cores = 1; 195 c->x86_num_cores = 1;
199 } 196 }
200 197
201#ifdef CONFIG_X86_SMP 198#ifdef CONFIG_X86_HT
202 /* 199 /*
203 * On a AMD dual core setup the lower bits of the APIC id 200 * On a AMD dual core setup the lower bits of the APIC id
204 * distingush the cores. Assumes number of cores is a power 201 * distingush the cores. Assumes number of cores is a power
205 * of two. 202 * of two.
206 */ 203 */
207 if (c->x86_num_cores > 1) { 204 if (c->x86_num_cores > 1) {
208 cpu_core_id[cpu] = cpu >> hweight32(c->x86_num_cores - 1); 205 int cpu = smp_processor_id();
206 unsigned bits = 0;
207 while ((1 << bits) < c->x86_num_cores)
208 bits++;
209 cpu_core_id[cpu] = phys_proc_id[cpu] & ((1<<bits)-1);
210 phys_proc_id[cpu] >>= bits;
209 printk(KERN_INFO "CPU %d(%d) -> Core %d\n", 211 printk(KERN_INFO "CPU %d(%d) -> Core %d\n",
210 cpu, c->x86_num_cores, cpu_core_id[cpu]); 212 cpu, c->x86_num_cores, cpu_core_id[cpu]);
211 } 213 }
diff --git a/arch/i386/kernel/cpu/common.c b/arch/i386/kernel/cpu/common.c
index 6be0310e3cd3..d199e525680a 100644
--- a/arch/i386/kernel/cpu/common.c
+++ b/arch/i386/kernel/cpu/common.c
@@ -243,6 +243,10 @@ static void __init early_cpu_detect(void)
243 } 243 }
244 244
245 early_intel_workaround(c); 245 early_intel_workaround(c);
246
247#ifdef CONFIG_X86_HT
248 phys_proc_id[smp_processor_id()] = (cpuid_ebx(1) >> 24) & 0xff;
249#endif
246} 250}
247 251
248void __init generic_identify(struct cpuinfo_x86 * c) 252void __init generic_identify(struct cpuinfo_x86 * c)
diff --git a/arch/i386/kernel/cpu/cpufreq/Kconfig b/arch/i386/kernel/cpu/cpufreq/Kconfig
index f25ffd74235c..0f1eb507233b 100644
--- a/arch/i386/kernel/cpu/cpufreq/Kconfig
+++ b/arch/i386/kernel/cpu/cpufreq/Kconfig
@@ -23,7 +23,7 @@ config X86_ACPI_CPUFREQ
23 If in doubt, say N. 23 If in doubt, say N.
24 24
25config ELAN_CPUFREQ 25config ELAN_CPUFREQ
26 tristate "AMD Elan" 26 tristate "AMD Elan SC400 and SC410"
27 select CPU_FREQ_TABLE 27 select CPU_FREQ_TABLE
28 depends on X86_ELAN 28 depends on X86_ELAN
29 ---help--- 29 ---help---
@@ -38,6 +38,18 @@ config ELAN_CPUFREQ
38 38
39 If in doubt, say N. 39 If in doubt, say N.
40 40
41config SC520_CPUFREQ
42 tristate "AMD Elan SC520"
43 select CPU_FREQ_TABLE
44 depends on X86_ELAN
45 ---help---
46 This adds the CPUFreq driver for AMD Elan SC520 processor.
47
48 For details, take a look at <file:Documentation/cpu-freq/>.
49
50 If in doubt, say N.
51
52
41config X86_POWERNOW_K6 53config X86_POWERNOW_K6
42 tristate "AMD Mobile K6-2/K6-3 PowerNow!" 54 tristate "AMD Mobile K6-2/K6-3 PowerNow!"
43 select CPU_FREQ_TABLE 55 select CPU_FREQ_TABLE
diff --git a/arch/i386/kernel/cpu/cpufreq/Makefile b/arch/i386/kernel/cpu/cpufreq/Makefile
index a922e97aeedd..2e894f1c8910 100644
--- a/arch/i386/kernel/cpu/cpufreq/Makefile
+++ b/arch/i386/kernel/cpu/cpufreq/Makefile
@@ -3,6 +3,7 @@ obj-$(CONFIG_X86_POWERNOW_K7) += powernow-k7.o
3obj-$(CONFIG_X86_POWERNOW_K8) += powernow-k8.o 3obj-$(CONFIG_X86_POWERNOW_K8) += powernow-k8.o
4obj-$(CONFIG_X86_LONGHAUL) += longhaul.o 4obj-$(CONFIG_X86_LONGHAUL) += longhaul.o
5obj-$(CONFIG_ELAN_CPUFREQ) += elanfreq.o 5obj-$(CONFIG_ELAN_CPUFREQ) += elanfreq.o
6obj-$(CONFIG_SC520_CPUFREQ) += sc520_freq.o
6obj-$(CONFIG_X86_LONGRUN) += longrun.o 7obj-$(CONFIG_X86_LONGRUN) += longrun.o
7obj-$(CONFIG_X86_GX_SUSPMOD) += gx-suspmod.o 8obj-$(CONFIG_X86_GX_SUSPMOD) += gx-suspmod.o
8obj-$(CONFIG_X86_SPEEDSTEP_ICH) += speedstep-ich.o 9obj-$(CONFIG_X86_SPEEDSTEP_ICH) += speedstep-ich.o
diff --git a/arch/i386/kernel/cpu/cpufreq/longhaul.c b/arch/i386/kernel/cpu/cpufreq/longhaul.c
index ab0f9f5aac11..04e3563da4fe 100644
--- a/arch/i386/kernel/cpu/cpufreq/longhaul.c
+++ b/arch/i386/kernel/cpu/cpufreq/longhaul.c
@@ -29,6 +29,7 @@
29#include <linux/cpufreq.h> 29#include <linux/cpufreq.h>
30#include <linux/slab.h> 30#include <linux/slab.h>
31#include <linux/string.h> 31#include <linux/string.h>
32#include <linux/pci.h>
32 33
33#include <asm/msr.h> 34#include <asm/msr.h>
34#include <asm/timex.h> 35#include <asm/timex.h>
@@ -119,7 +120,13 @@ static int longhaul_get_cpu_mult(void)
119static void do_powersaver(union msr_longhaul *longhaul, 120static void do_powersaver(union msr_longhaul *longhaul,
120 unsigned int clock_ratio_index) 121 unsigned int clock_ratio_index)
121{ 122{
123 struct pci_dev *dev;
124 unsigned long flags;
125 unsigned int tmp_mask;
122 int version; 126 int version;
127 int i;
128 u16 pci_cmd;
129 u16 cmd_state[64];
123 130
124 switch (cpu_model) { 131 switch (cpu_model) {
125 case CPU_EZRA_T: 132 case CPU_EZRA_T:
@@ -137,17 +144,58 @@ static void do_powersaver(union msr_longhaul *longhaul,
137 longhaul->bits.SoftBusRatio4 = (clock_ratio_index & 0x10) >> 4; 144 longhaul->bits.SoftBusRatio4 = (clock_ratio_index & 0x10) >> 4;
138 longhaul->bits.EnableSoftBusRatio = 1; 145 longhaul->bits.EnableSoftBusRatio = 1;
139 longhaul->bits.RevisionKey = 0; 146 longhaul->bits.RevisionKey = 0;
140 local_irq_disable(); 147
141 wrmsrl(MSR_VIA_LONGHAUL, longhaul->val); 148 preempt_disable();
149 local_irq_save(flags);
150
151 /*
152 * get current pci bus master state for all devices
153 * and clear bus master bit
154 */
155 dev = NULL;
156 i = 0;
157 do {
158 dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev);
159 if (dev != NULL) {
160 pci_read_config_word(dev, PCI_COMMAND, &pci_cmd);
161 cmd_state[i++] = pci_cmd;
162 pci_cmd &= ~PCI_COMMAND_MASTER;
163 pci_write_config_word(dev, PCI_COMMAND, pci_cmd);
164 }
165 } while (dev != NULL);
166
167 tmp_mask=inb(0x21); /* works on C3. save mask. */
168 outb(0xFE,0x21); /* TMR0 only */
169 outb(0xFF,0x80); /* delay */
170
142 local_irq_enable(); 171 local_irq_enable();
172
173 __hlt();
174 wrmsrl(MSR_VIA_LONGHAUL, longhaul->val);
143 __hlt(); 175 __hlt();
144 176
177 local_irq_disable();
178
179 outb(tmp_mask,0x21); /* restore mask */
180
181 /* restore pci bus master state for all devices */
182 dev = NULL;
183 i = 0;
184 do {
185 dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev);
186 if (dev != NULL) {
187 pci_cmd = cmd_state[i++];
188 pci_write_config_byte(dev, PCI_COMMAND, pci_cmd);
189 }
190 } while (dev != NULL);
191 local_irq_restore(flags);
192 preempt_enable();
193
194 /* disable bus ratio bit */
145 rdmsrl(MSR_VIA_LONGHAUL, longhaul->val); 195 rdmsrl(MSR_VIA_LONGHAUL, longhaul->val);
146 longhaul->bits.EnableSoftBusRatio = 0; 196 longhaul->bits.EnableSoftBusRatio = 0;
147 longhaul->bits.RevisionKey = version; 197 longhaul->bits.RevisionKey = version;
148 local_irq_disable();
149 wrmsrl(MSR_VIA_LONGHAUL, longhaul->val); 198 wrmsrl(MSR_VIA_LONGHAUL, longhaul->val);
150 local_irq_enable();
151} 199}
152 200
153/** 201/**
@@ -578,7 +626,7 @@ static int __init longhaul_cpu_init(struct cpufreq_policy *policy)
578 longhaul_setup_voltagescaling(); 626 longhaul_setup_voltagescaling();
579 627
580 policy->governor = CPUFREQ_DEFAULT_GOVERNOR; 628 policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
581 policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL; 629 policy->cpuinfo.transition_latency = 200000; /* nsec */
582 policy->cur = calc_speed(longhaul_get_cpu_mult()); 630 policy->cur = calc_speed(longhaul_get_cpu_mult());
583 631
584 ret = cpufreq_frequency_table_cpuinfo(policy, longhaul_table); 632 ret = cpufreq_frequency_table_cpuinfo(policy, longhaul_table);
diff --git a/arch/i386/kernel/cpu/cpufreq/powernow-k7.c b/arch/i386/kernel/cpu/cpufreq/powernow-k7.c
index 913f652623d9..5c530064eb74 100644
--- a/arch/i386/kernel/cpu/cpufreq/powernow-k7.c
+++ b/arch/i386/kernel/cpu/cpufreq/powernow-k7.c
@@ -23,6 +23,7 @@
23#include <linux/dmi.h> 23#include <linux/dmi.h>
24 24
25#include <asm/msr.h> 25#include <asm/msr.h>
26#include <asm/timer.h>
26#include <asm/timex.h> 27#include <asm/timex.h>
27#include <asm/io.h> 28#include <asm/io.h>
28#include <asm/system.h> 29#include <asm/system.h>
@@ -586,13 +587,17 @@ static int __init powernow_cpu_init (struct cpufreq_policy *policy)
586 587
587 rdmsrl (MSR_K7_FID_VID_STATUS, fidvidstatus.val); 588 rdmsrl (MSR_K7_FID_VID_STATUS, fidvidstatus.val);
588 589
589 /* A K7 with powernow technology is set to max frequency by BIOS */ 590 /* recalibrate cpu_khz */
590 fsb = (10 * cpu_khz) / fid_codes[fidvidstatus.bits.MFID]; 591 result = recalibrate_cpu_khz();
592 if (result)
593 return result;
594
595 fsb = (10 * cpu_khz) / fid_codes[fidvidstatus.bits.CFID];
591 if (!fsb) { 596 if (!fsb) {
592 printk(KERN_WARNING PFX "can not determine bus frequency\n"); 597 printk(KERN_WARNING PFX "can not determine bus frequency\n");
593 return -EINVAL; 598 return -EINVAL;
594 } 599 }
595 dprintk("FSB: %3d.%03d MHz\n", fsb/1000, fsb%1000); 600 dprintk("FSB: %3dMHz\n", fsb/1000);
596 601
597 if (dmi_check_system(powernow_dmi_table) || acpi_force) { 602 if (dmi_check_system(powernow_dmi_table) || acpi_force) {
598 printk (KERN_INFO PFX "PSB/PST known to be broken. Trying ACPI instead\n"); 603 printk (KERN_INFO PFX "PSB/PST known to be broken. Trying ACPI instead\n");
diff --git a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c
index a65ff7e32e5d..10cc096c0ade 100644
--- a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c
+++ b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c
@@ -4,7 +4,7 @@
4 * GNU general public license version 2. See "COPYING" or 4 * GNU general public license version 2. See "COPYING" or
5 * http://www.gnu.org/licenses/gpl.html 5 * http://www.gnu.org/licenses/gpl.html
6 * 6 *
7 * Support : paul.devriendt@amd.com 7 * Support : mark.langsdorf@amd.com
8 * 8 *
9 * Based on the powernow-k7.c module written by Dave Jones. 9 * Based on the powernow-k7.c module written by Dave Jones.
10 * (C) 2003 Dave Jones <davej@codemonkey.org.uk> on behalf of SuSE Labs 10 * (C) 2003 Dave Jones <davej@codemonkey.org.uk> on behalf of SuSE Labs
@@ -15,12 +15,13 @@
15 * 15 *
16 * Valuable input gratefully received from Dave Jones, Pavel Machek, 16 * Valuable input gratefully received from Dave Jones, Pavel Machek,
17 * Dominik Brodowski, and others. 17 * Dominik Brodowski, and others.
18 * Originally developed by Paul Devriendt.
18 * Processor information obtained from Chapter 9 (Power and Thermal Management) 19 * Processor information obtained from Chapter 9 (Power and Thermal Management)
19 * of the "BIOS and Kernel Developer's Guide for the AMD Athlon 64 and AMD 20 * of the "BIOS and Kernel Developer's Guide for the AMD Athlon 64 and AMD
20 * Opteron Processors" available for download from www.amd.com 21 * Opteron Processors" available for download from www.amd.com
21 * 22 *
22 * Tables for specific CPUs can be infrerred from 23 * Tables for specific CPUs can be infrerred from
23 * http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/30430.pdf 24 * http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/30430.pdf
24 */ 25 */
25 26
26#include <linux/kernel.h> 27#include <linux/kernel.h>
@@ -30,6 +31,7 @@
30#include <linux/cpufreq.h> 31#include <linux/cpufreq.h>
31#include <linux/slab.h> 32#include <linux/slab.h>
32#include <linux/string.h> 33#include <linux/string.h>
34#include <linux/cpumask.h>
33 35
34#include <asm/msr.h> 36#include <asm/msr.h>
35#include <asm/io.h> 37#include <asm/io.h>
@@ -42,7 +44,7 @@
42 44
43#define PFX "powernow-k8: " 45#define PFX "powernow-k8: "
44#define BFX PFX "BIOS error: " 46#define BFX PFX "BIOS error: "
45#define VERSION "version 1.00.09e" 47#define VERSION "version 1.40.2"
46#include "powernow-k8.h" 48#include "powernow-k8.h"
47 49
48/* serialize freq changes */ 50/* serialize freq changes */
@@ -50,6 +52,10 @@ static DECLARE_MUTEX(fidvid_sem);
50 52
51static struct powernow_k8_data *powernow_data[NR_CPUS]; 53static struct powernow_k8_data *powernow_data[NR_CPUS];
52 54
55#ifndef CONFIG_SMP
56static cpumask_t cpu_core_map[1];
57#endif
58
53/* Return a frequency in MHz, given an input fid */ 59/* Return a frequency in MHz, given an input fid */
54static u32 find_freq_from_fid(u32 fid) 60static u32 find_freq_from_fid(u32 fid)
55{ 61{
@@ -274,11 +280,18 @@ static int core_voltage_pre_transition(struct powernow_k8_data *data, u32 reqvid
274{ 280{
275 u32 rvosteps = data->rvo; 281 u32 rvosteps = data->rvo;
276 u32 savefid = data->currfid; 282 u32 savefid = data->currfid;
283 u32 maxvid, lo;
277 284
278 dprintk("ph1 (cpu%d): start, currfid 0x%x, currvid 0x%x, reqvid 0x%x, rvo 0x%x\n", 285 dprintk("ph1 (cpu%d): start, currfid 0x%x, currvid 0x%x, reqvid 0x%x, rvo 0x%x\n",
279 smp_processor_id(), 286 smp_processor_id(),
280 data->currfid, data->currvid, reqvid, data->rvo); 287 data->currfid, data->currvid, reqvid, data->rvo);
281 288
289 rdmsr(MSR_FIDVID_STATUS, lo, maxvid);
290 maxvid = 0x1f & (maxvid >> 16);
291 dprintk("ph1 maxvid=0x%x\n", maxvid);
292 if (reqvid < maxvid) /* lower numbers are higher voltages */
293 reqvid = maxvid;
294
282 while (data->currvid > reqvid) { 295 while (data->currvid > reqvid) {
283 dprintk("ph1: curr 0x%x, req vid 0x%x\n", 296 dprintk("ph1: curr 0x%x, req vid 0x%x\n",
284 data->currvid, reqvid); 297 data->currvid, reqvid);
@@ -286,8 +299,8 @@ static int core_voltage_pre_transition(struct powernow_k8_data *data, u32 reqvid
286 return 1; 299 return 1;
287 } 300 }
288 301
289 while ((rvosteps > 0) && ((data->rvo + data->currvid) > reqvid)) { 302 while ((rvosteps > 0) && ((data->rvo + data->currvid) > reqvid)) {
290 if (data->currvid == 0) { 303 if (data->currvid == maxvid) {
291 rvosteps = 0; 304 rvosteps = 0;
292 } else { 305 } else {
293 dprintk("ph1: changing vid for rvo, req 0x%x\n", 306 dprintk("ph1: changing vid for rvo, req 0x%x\n",
@@ -671,7 +684,7 @@ static int find_psb_table(struct powernow_k8_data *data)
671 * BIOS and Kernel Developer's Guide, which is available on 684 * BIOS and Kernel Developer's Guide, which is available on
672 * www.amd.com 685 * www.amd.com
673 */ 686 */
674 printk(KERN_ERR PFX "BIOS error - no PSB\n"); 687 printk(KERN_INFO PFX "BIOS error - no PSB or ACPI _PSS objects\n");
675 return -ENODEV; 688 return -ENODEV;
676} 689}
677 690
@@ -695,7 +708,7 @@ static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
695 struct cpufreq_frequency_table *powernow_table; 708 struct cpufreq_frequency_table *powernow_table;
696 709
697 if (acpi_processor_register_performance(&data->acpi_data, data->cpu)) { 710 if (acpi_processor_register_performance(&data->acpi_data, data->cpu)) {
698 dprintk("register performance failed\n"); 711 dprintk("register performance failed: bad ACPI data\n");
699 return -EIO; 712 return -EIO;
700 } 713 }
701 714
@@ -746,22 +759,23 @@ static int powernow_k8_cpu_init_acpi(struct powernow_k8_data *data)
746 continue; 759 continue;
747 } 760 }
748 761
749 if (fid < HI_FID_TABLE_BOTTOM) { 762 /* verify only 1 entry from the lo frequency table */
750 if (cntlofreq) { 763 if (fid < HI_FID_TABLE_BOTTOM) {
751 /* if both entries are the same, ignore this 764 if (cntlofreq) {
752 * one... 765 /* if both entries are the same, ignore this
753 */ 766 * one...
754 if ((powernow_table[i].frequency != powernow_table[cntlofreq].frequency) || 767 */
755 (powernow_table[i].index != powernow_table[cntlofreq].index)) { 768 if ((powernow_table[i].frequency != powernow_table[cntlofreq].frequency) ||
756 printk(KERN_ERR PFX "Too many lo freq table entries\n"); 769 (powernow_table[i].index != powernow_table[cntlofreq].index)) {
757 goto err_out_mem; 770 printk(KERN_ERR PFX "Too many lo freq table entries\n");
758 } 771 goto err_out_mem;
759 772 }
760 dprintk("double low frequency table entry, ignoring it.\n"); 773
761 powernow_table[i].frequency = CPUFREQ_ENTRY_INVALID; 774 dprintk("double low frequency table entry, ignoring it.\n");
762 continue; 775 powernow_table[i].frequency = CPUFREQ_ENTRY_INVALID;
763 } else 776 continue;
764 cntlofreq = i; 777 } else
778 cntlofreq = i;
765 } 779 }
766 780
767 if (powernow_table[i].frequency != (data->acpi_data.states[i].core_frequency * 1000)) { 781 if (powernow_table[i].frequency != (data->acpi_data.states[i].core_frequency * 1000)) {
@@ -816,7 +830,7 @@ static int transition_frequency(struct powernow_k8_data *data, unsigned int inde
816{ 830{
817 u32 fid; 831 u32 fid;
818 u32 vid; 832 u32 vid;
819 int res; 833 int res, i;
820 struct cpufreq_freqs freqs; 834 struct cpufreq_freqs freqs;
821 835
822 dprintk("cpu %d transition to index %u\n", smp_processor_id(), index); 836 dprintk("cpu %d transition to index %u\n", smp_processor_id(), index);
@@ -841,7 +855,8 @@ static int transition_frequency(struct powernow_k8_data *data, unsigned int inde
841 } 855 }
842 856
843 if ((fid < HI_FID_TABLE_BOTTOM) && (data->currfid < HI_FID_TABLE_BOTTOM)) { 857 if ((fid < HI_FID_TABLE_BOTTOM) && (data->currfid < HI_FID_TABLE_BOTTOM)) {
844 printk("ignoring illegal change in lo freq table-%x to 0x%x\n", 858 printk(KERN_ERR PFX
859 "ignoring illegal change in lo freq table-%x to 0x%x\n",
845 data->currfid, fid); 860 data->currfid, fid);
846 return 1; 861 return 1;
847 } 862 }
@@ -850,18 +865,20 @@ static int transition_frequency(struct powernow_k8_data *data, unsigned int inde
850 smp_processor_id(), fid, vid); 865 smp_processor_id(), fid, vid);
851 866
852 freqs.cpu = data->cpu; 867 freqs.cpu = data->cpu;
853
854 freqs.old = find_khz_freq_from_fid(data->currfid); 868 freqs.old = find_khz_freq_from_fid(data->currfid);
855 freqs.new = find_khz_freq_from_fid(fid); 869 freqs.new = find_khz_freq_from_fid(fid);
856 cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); 870 for_each_cpu_mask(i, cpu_core_map[data->cpu]) {
871 freqs.cpu = i;
872 cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
873 }
857 874
858 down(&fidvid_sem);
859 res = transition_fid_vid(data, fid, vid); 875 res = transition_fid_vid(data, fid, vid);
860 up(&fidvid_sem);
861 876
862 freqs.new = find_khz_freq_from_fid(data->currfid); 877 freqs.new = find_khz_freq_from_fid(data->currfid);
863 cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); 878 for_each_cpu_mask(i, cpu_core_map[data->cpu]) {
864 879 freqs.cpu = i;
880 cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
881 }
865 return res; 882 return res;
866} 883}
867 884
@@ -874,6 +891,7 @@ static int powernowk8_target(struct cpufreq_policy *pol, unsigned targfreq, unsi
874 u32 checkvid = data->currvid; 891 u32 checkvid = data->currvid;
875 unsigned int newstate; 892 unsigned int newstate;
876 int ret = -EIO; 893 int ret = -EIO;
894 int i;
877 895
878 /* only run on specific CPU from here on */ 896 /* only run on specific CPU from here on */
879 oldmask = current->cpus_allowed; 897 oldmask = current->cpus_allowed;
@@ -902,22 +920,41 @@ static int powernowk8_target(struct cpufreq_policy *pol, unsigned targfreq, unsi
902 data->currfid, data->currvid); 920 data->currfid, data->currvid);
903 921
904 if ((checkvid != data->currvid) || (checkfid != data->currfid)) { 922 if ((checkvid != data->currvid) || (checkfid != data->currfid)) {
905 printk(KERN_ERR PFX 923 printk(KERN_INFO PFX
906 "error - out of sync, fid 0x%x 0x%x, vid 0x%x 0x%x\n", 924 "error - out of sync, fix 0x%x 0x%x, vid 0x%x 0x%x\n",
907 checkfid, data->currfid, checkvid, data->currvid); 925 checkfid, data->currfid, checkvid, data->currvid);
908 } 926 }
909 927
910 if (cpufreq_frequency_table_target(pol, data->powernow_table, targfreq, relation, &newstate)) 928 if (cpufreq_frequency_table_target(pol, data->powernow_table, targfreq, relation, &newstate))
911 goto err_out; 929 goto err_out;
912 930
931 down(&fidvid_sem);
932
933 for_each_cpu_mask(i, cpu_core_map[pol->cpu]) {
934 /* make sure the sibling is initialized */
935 if (!powernow_data[i]) {
936 ret = 0;
937 up(&fidvid_sem);
938 goto err_out;
939 }
940 }
941
913 powernow_k8_acpi_pst_values(data, newstate); 942 powernow_k8_acpi_pst_values(data, newstate);
914 943
915 if (transition_frequency(data, newstate)) { 944 if (transition_frequency(data, newstate)) {
916 printk(KERN_ERR PFX "transition frequency failed\n"); 945 printk(KERN_ERR PFX "transition frequency failed\n");
917 ret = 1; 946 ret = 1;
947 up(&fidvid_sem);
918 goto err_out; 948 goto err_out;
919 } 949 }
920 950
951 /* Update all the fid/vids of our siblings */
952 for_each_cpu_mask(i, cpu_core_map[pol->cpu]) {
953 powernow_data[i]->currvid = data->currvid;
954 powernow_data[i]->currfid = data->currfid;
955 }
956 up(&fidvid_sem);
957
921 pol->cur = find_khz_freq_from_fid(data->currfid); 958 pol->cur = find_khz_freq_from_fid(data->currfid);
922 ret = 0; 959 ret = 0;
923 960
@@ -962,7 +999,7 @@ static int __init powernowk8_cpu_init(struct cpufreq_policy *pol)
962 */ 999 */
963 1000
964 if ((num_online_cpus() != 1) || (num_possible_cpus() != 1)) { 1001 if ((num_online_cpus() != 1) || (num_possible_cpus() != 1)) {
965 printk(KERN_INFO PFX "MP systems not supported by PSB BIOS structure\n"); 1002 printk(KERN_ERR PFX "MP systems not supported by PSB BIOS structure\n");
966 kfree(data); 1003 kfree(data);
967 return -ENODEV; 1004 return -ENODEV;
968 } 1005 }
@@ -1003,6 +1040,7 @@ static int __init powernowk8_cpu_init(struct cpufreq_policy *pol)
1003 schedule(); 1040 schedule();
1004 1041
1005 pol->governor = CPUFREQ_DEFAULT_GOVERNOR; 1042 pol->governor = CPUFREQ_DEFAULT_GOVERNOR;
1043 pol->cpus = cpu_core_map[pol->cpu];
1006 1044
1007 /* Take a crude guess here. 1045 /* Take a crude guess here.
1008 * That guess was in microseconds, so multiply with 1000 */ 1046 * That guess was in microseconds, so multiply with 1000 */
@@ -1069,7 +1107,7 @@ static unsigned int powernowk8_get (unsigned int cpu)
1069 return 0; 1107 return 0;
1070 } 1108 }
1071 preempt_disable(); 1109 preempt_disable();
1072 1110
1073 if (query_current_values_with_pending_wait(data)) 1111 if (query_current_values_with_pending_wait(data))
1074 goto out; 1112 goto out;
1075 1113
@@ -1127,9 +1165,10 @@ static void __exit powernowk8_exit(void)
1127 cpufreq_unregister_driver(&cpufreq_amd64_driver); 1165 cpufreq_unregister_driver(&cpufreq_amd64_driver);
1128} 1166}
1129 1167
1130MODULE_AUTHOR("Paul Devriendt <paul.devriendt@amd.com>"); 1168MODULE_AUTHOR("Paul Devriendt <paul.devriendt@amd.com> and Mark Langsdorf <mark.langsdorf@amd.com.");
1131MODULE_DESCRIPTION("AMD Athlon 64 and Opteron processor frequency driver."); 1169MODULE_DESCRIPTION("AMD Athlon 64 and Opteron processor frequency driver.");
1132MODULE_LICENSE("GPL"); 1170MODULE_LICENSE("GPL");
1133 1171
1134late_initcall(powernowk8_init); 1172late_initcall(powernowk8_init);
1135module_exit(powernowk8_exit); 1173module_exit(powernowk8_exit);
1174
diff --git a/arch/i386/kernel/cpu/cpufreq/powernow-k8.h b/arch/i386/kernel/cpu/cpufreq/powernow-k8.h
index 63ebc8470f52..9ed5bf221cb7 100644
--- a/arch/i386/kernel/cpu/cpufreq/powernow-k8.h
+++ b/arch/i386/kernel/cpu/cpufreq/powernow-k8.h
@@ -174,3 +174,18 @@ static int core_voltage_post_transition(struct powernow_k8_data *data, u32 reqvi
174static int core_frequency_transition(struct powernow_k8_data *data, u32 reqfid); 174static int core_frequency_transition(struct powernow_k8_data *data, u32 reqfid);
175 175
176static void powernow_k8_acpi_pst_values(struct powernow_k8_data *data, unsigned int index); 176static void powernow_k8_acpi_pst_values(struct powernow_k8_data *data, unsigned int index);
177
178#ifndef for_each_cpu_mask
179#define for_each_cpu_mask(i,mask) for (i=0;i<1;i++)
180#endif
181
182#ifdef CONFIG_SMP
183static inline void define_siblings(int cpu, cpumask_t cpu_sharedcore_mask[])
184{
185}
186#else
187static inline void define_siblings(int cpu, cpumask_t cpu_sharedcore_mask[])
188{
189 cpu_set(0, cpu_sharedcore_mask[0]);
190}
191#endif
diff --git a/arch/i386/kernel/cpu/cpufreq/sc520_freq.c b/arch/i386/kernel/cpu/cpufreq/sc520_freq.c
new file mode 100644
index 000000000000..ef457d50f4ac
--- /dev/null
+++ b/arch/i386/kernel/cpu/cpufreq/sc520_freq.c
@@ -0,0 +1,186 @@
1/*
2 * sc520_freq.c: cpufreq driver for the AMD Elan sc520
3 *
4 * Copyright (C) 2005 Sean Young <sean@mess.org>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 * Based on elanfreq.c
12 *
13 * 2005-03-30: - initial revision
14 */
15
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/init.h>
19
20#include <linux/delay.h>
21#include <linux/cpufreq.h>
22
23#include <asm/msr.h>
24#include <asm/timex.h>
25#include <asm/io.h>
26
27#define MMCR_BASE 0xfffef000 /* The default base address */
28#define OFFS_CPUCTL 0x2 /* CPU Control Register */
29
30static __u8 __iomem *cpuctl;
31
32#define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "sc520_freq", msg)
33
34static struct cpufreq_frequency_table sc520_freq_table[] = {
35 {0x01, 100000},
36 {0x02, 133000},
37 {0, CPUFREQ_TABLE_END},
38};
39
40static unsigned int sc520_freq_get_cpu_frequency(unsigned int cpu)
41{
42 u8 clockspeed_reg = *cpuctl;
43
44 switch (clockspeed_reg & 0x03) {
45 default:
46 printk(KERN_ERR "sc520_freq: error: cpuctl register has unexpected value %02x\n", clockspeed_reg);
47 case 0x01:
48 return 100000;
49 case 0x02:
50 return 133000;
51 }
52}
53
54static void sc520_freq_set_cpu_state (unsigned int state)
55{
56
57 struct cpufreq_freqs freqs;
58 u8 clockspeed_reg;
59
60 freqs.old = sc520_freq_get_cpu_frequency(0);
61 freqs.new = sc520_freq_table[state].frequency;
62 freqs.cpu = 0; /* AMD Elan is UP */
63
64 cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
65
66 dprintk("attempting to set frequency to %i kHz\n",
67 sc520_freq_table[state].frequency);
68
69 local_irq_disable();
70
71 clockspeed_reg = *cpuctl & ~0x03;
72 *cpuctl = clockspeed_reg | sc520_freq_table[state].index;
73
74 local_irq_enable();
75
76 cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
77};
78
79static int sc520_freq_verify (struct cpufreq_policy *policy)
80{
81 return cpufreq_frequency_table_verify(policy, &sc520_freq_table[0]);
82}
83
84static int sc520_freq_target (struct cpufreq_policy *policy,
85 unsigned int target_freq,
86 unsigned int relation)
87{
88 unsigned int newstate = 0;
89
90 if (cpufreq_frequency_table_target(policy, sc520_freq_table, target_freq, relation, &newstate))
91 return -EINVAL;
92
93 sc520_freq_set_cpu_state(newstate);
94
95 return 0;
96}
97
98
99/*
100 * Module init and exit code
101 */
102
103static int sc520_freq_cpu_init(struct cpufreq_policy *policy)
104{
105 struct cpuinfo_x86 *c = cpu_data;
106 int result;
107
108 /* capability check */
109 if (c->x86_vendor != X86_VENDOR_AMD ||
110 c->x86 != 4 || c->x86_model != 9)
111 return -ENODEV;
112
113 /* cpuinfo and default policy values */
114 policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
115 policy->cpuinfo.transition_latency = 1000000; /* 1ms */
116 policy->cur = sc520_freq_get_cpu_frequency(0);
117
118 result = cpufreq_frequency_table_cpuinfo(policy, sc520_freq_table);
119 if (result)
120 return (result);
121
122 cpufreq_frequency_table_get_attr(sc520_freq_table, policy->cpu);
123
124 return 0;
125}
126
127
128static int sc520_freq_cpu_exit(struct cpufreq_policy *policy)
129{
130 cpufreq_frequency_table_put_attr(policy->cpu);
131 return 0;
132}
133
134
135static struct freq_attr* sc520_freq_attr[] = {
136 &cpufreq_freq_attr_scaling_available_freqs,
137 NULL,
138};
139
140
141static struct cpufreq_driver sc520_freq_driver = {
142 .get = sc520_freq_get_cpu_frequency,
143 .verify = sc520_freq_verify,
144 .target = sc520_freq_target,
145 .init = sc520_freq_cpu_init,
146 .exit = sc520_freq_cpu_exit,
147 .name = "sc520_freq",
148 .owner = THIS_MODULE,
149 .attr = sc520_freq_attr,
150};
151
152
153static int __init sc520_freq_init(void)
154{
155 struct cpuinfo_x86 *c = cpu_data;
156
157 /* Test if we have the right hardware */
158 if(c->x86_vendor != X86_VENDOR_AMD ||
159 c->x86 != 4 || c->x86_model != 9) {
160 dprintk("no Elan SC520 processor found!\n");
161 return -ENODEV;
162 }
163 cpuctl = ioremap((unsigned long)(MMCR_BASE + OFFS_CPUCTL), 1);
164 if(!cpuctl) {
165 printk(KERN_ERR "sc520_freq: error: failed to remap memory\n");
166 return -ENOMEM;
167 }
168
169 return cpufreq_register_driver(&sc520_freq_driver);
170}
171
172
173static void __exit sc520_freq_exit(void)
174{
175 cpufreq_unregister_driver(&sc520_freq_driver);
176 iounmap(cpuctl);
177}
178
179
180MODULE_LICENSE("GPL");
181MODULE_AUTHOR("Sean Young <sean@mess.org>");
182MODULE_DESCRIPTION("cpufreq driver for AMD's Elan sc520 CPU");
183
184module_init(sc520_freq_init);
185module_exit(sc520_freq_exit);
186
diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c b/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c
index 07d5612dc00f..7dcbf70fc16f 100644
--- a/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c
+++ b/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c
@@ -54,6 +54,8 @@ enum {
54 CPU_DOTHAN_A1, 54 CPU_DOTHAN_A1,
55 CPU_DOTHAN_A2, 55 CPU_DOTHAN_A2,
56 CPU_DOTHAN_B0, 56 CPU_DOTHAN_B0,
57 CPU_MP4HT_D0,
58 CPU_MP4HT_E0,
57}; 59};
58 60
59static const struct cpu_id cpu_ids[] = { 61static const struct cpu_id cpu_ids[] = {
@@ -61,6 +63,8 @@ static const struct cpu_id cpu_ids[] = {
61 [CPU_DOTHAN_A1] = { 6, 13, 1 }, 63 [CPU_DOTHAN_A1] = { 6, 13, 1 },
62 [CPU_DOTHAN_A2] = { 6, 13, 2 }, 64 [CPU_DOTHAN_A2] = { 6, 13, 2 },
63 [CPU_DOTHAN_B0] = { 6, 13, 6 }, 65 [CPU_DOTHAN_B0] = { 6, 13, 6 },
66 [CPU_MP4HT_D0] = {15, 3, 4 },
67 [CPU_MP4HT_E0] = {15, 4, 1 },
64}; 68};
65#define N_IDS (sizeof(cpu_ids)/sizeof(cpu_ids[0])) 69#define N_IDS (sizeof(cpu_ids)/sizeof(cpu_ids[0]))
66 70
@@ -226,6 +230,8 @@ static struct cpu_model models[] =
226 { &cpu_ids[CPU_DOTHAN_A1], NULL, 0, NULL }, 230 { &cpu_ids[CPU_DOTHAN_A1], NULL, 0, NULL },
227 { &cpu_ids[CPU_DOTHAN_A2], NULL, 0, NULL }, 231 { &cpu_ids[CPU_DOTHAN_A2], NULL, 0, NULL },
228 { &cpu_ids[CPU_DOTHAN_B0], NULL, 0, NULL }, 232 { &cpu_ids[CPU_DOTHAN_B0], NULL, 0, NULL },
233 { &cpu_ids[CPU_MP4HT_D0], NULL, 0, NULL },
234 { &cpu_ids[CPU_MP4HT_E0], NULL, 0, NULL },
229 235
230 { NULL, } 236 { NULL, }
231}; 237};
diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-lib.c b/arch/i386/kernel/cpu/cpufreq/speedstep-lib.c
index 8ba430a9c3a2..d368b3f5fce8 100644
--- a/arch/i386/kernel/cpu/cpufreq/speedstep-lib.c
+++ b/arch/i386/kernel/cpu/cpufreq/speedstep-lib.c
@@ -336,7 +336,7 @@ unsigned int speedstep_get_freqs(unsigned int processor,
336 if (!prev_speed) 336 if (!prev_speed)
337 return -EIO; 337 return -EIO;
338 338
339 dprintk("previous seped is %u\n", prev_speed); 339 dprintk("previous speed is %u\n", prev_speed);
340 340
341 local_irq_save(flags); 341 local_irq_save(flags);
342 342
@@ -348,7 +348,7 @@ unsigned int speedstep_get_freqs(unsigned int processor,
348 goto out; 348 goto out;
349 } 349 }
350 350
351 dprintk("low seped is %u\n", *low_speed); 351 dprintk("low speed is %u\n", *low_speed);
352 352
353 /* switch to high state */ 353 /* switch to high state */
354 set_state(SPEEDSTEP_HIGH); 354 set_state(SPEEDSTEP_HIGH);
@@ -358,7 +358,7 @@ unsigned int speedstep_get_freqs(unsigned int processor,
358 goto out; 358 goto out;
359 } 359 }
360 360
361 dprintk("high seped is %u\n", *high_speed); 361 dprintk("high speed is %u\n", *high_speed);
362 362
363 if (*low_speed == *high_speed) { 363 if (*low_speed == *high_speed) {
364 ret = -ENODEV; 364 ret = -ENODEV;
diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-smi.c b/arch/i386/kernel/cpu/cpufreq/speedstep-smi.c
index 79440b3f087e..b25fb6b635ae 100644
--- a/arch/i386/kernel/cpu/cpufreq/speedstep-smi.c
+++ b/arch/i386/kernel/cpu/cpufreq/speedstep-smi.c
@@ -357,6 +357,9 @@ static int __init speedstep_init(void)
357 case SPEEDSTEP_PROCESSOR_PIII_C: 357 case SPEEDSTEP_PROCESSOR_PIII_C:
358 case SPEEDSTEP_PROCESSOR_PIII_C_EARLY: 358 case SPEEDSTEP_PROCESSOR_PIII_C_EARLY:
359 break; 359 break;
360 case SPEEDSTEP_PROCESSOR_P4M:
361 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");
362 break;
360 default: 363 default:
361 speedstep_processor = 0; 364 speedstep_processor = 0;
362 } 365 }
diff --git a/arch/i386/kernel/cpu/intel_cacheinfo.c b/arch/i386/kernel/cpu/intel_cacheinfo.c
index aeb5b4ef8c8b..a710dc4eb20e 100644
--- a/arch/i386/kernel/cpu/intel_cacheinfo.c
+++ b/arch/i386/kernel/cpu/intel_cacheinfo.c
@@ -118,7 +118,7 @@ struct _cpuid4_info {
118}; 118};
119 119
120#define MAX_CACHE_LEAVES 4 120#define MAX_CACHE_LEAVES 4
121static unsigned short __devinitdata num_cache_leaves; 121static unsigned short num_cache_leaves;
122 122
123static int __devinit cpuid4_cache_lookup(int index, struct _cpuid4_info *this_leaf) 123static int __devinit cpuid4_cache_lookup(int index, struct _cpuid4_info *this_leaf)
124{ 124{
diff --git a/arch/i386/kernel/setup.c b/arch/i386/kernel/setup.c
index 945ec73163c8..2bfbddebdbf8 100644
--- a/arch/i386/kernel/setup.c
+++ b/arch/i386/kernel/setup.c
@@ -1502,11 +1502,13 @@ void __init setup_arch(char **cmdline_p)
1502 if (efi_enabled) 1502 if (efi_enabled)
1503 efi_map_memmap(); 1503 efi_map_memmap();
1504 1504
1505#ifdef CONFIG_ACPI_BOOT
1505 /* 1506 /*
1506 * Parse the ACPI tables for possible boot-time SMP configuration. 1507 * Parse the ACPI tables for possible boot-time SMP configuration.
1507 */ 1508 */
1508 acpi_boot_table_init(); 1509 acpi_boot_table_init();
1509 acpi_boot_init(); 1510 acpi_boot_init();
1511#endif
1510 1512
1511#ifdef CONFIG_X86_LOCAL_APIC 1513#ifdef CONFIG_X86_LOCAL_APIC
1512 if (smp_found_config) 1514 if (smp_found_config)
diff --git a/arch/i386/kernel/smpboot.c b/arch/i386/kernel/smpboot.c
index cbea7ac582e5..bc1bb6919e6a 100644
--- a/arch/i386/kernel/smpboot.c
+++ b/arch/i386/kernel/smpboot.c
@@ -888,6 +888,7 @@ void *xquad_portio;
888 888
889cpumask_t cpu_sibling_map[NR_CPUS] __cacheline_aligned; 889cpumask_t cpu_sibling_map[NR_CPUS] __cacheline_aligned;
890cpumask_t cpu_core_map[NR_CPUS] __cacheline_aligned; 890cpumask_t cpu_core_map[NR_CPUS] __cacheline_aligned;
891EXPORT_SYMBOL(cpu_core_map);
891 892
892static void __init smp_boot_cpus(unsigned int max_cpus) 893static void __init smp_boot_cpus(unsigned int max_cpus)
893{ 894{
@@ -1073,8 +1074,10 @@ static void __init smp_boot_cpus(unsigned int max_cpus)
1073 cpu_set(cpu, cpu_sibling_map[cpu]); 1074 cpu_set(cpu, cpu_sibling_map[cpu]);
1074 } 1075 }
1075 1076
1076 if (siblings != smp_num_siblings) 1077 if (siblings != smp_num_siblings) {
1077 printk(KERN_WARNING "WARNING: %d siblings found for CPU%d, should be %d\n", siblings, cpu, smp_num_siblings); 1078 printk(KERN_WARNING "WARNING: %d siblings found for CPU%d, should be %d\n", siblings, cpu, smp_num_siblings);
1079 smp_num_siblings = siblings;
1080 }
1078 1081
1079 if (c->x86_num_cores > 1) { 1082 if (c->x86_num_cores > 1) {
1080 for (i = 0; i < NR_CPUS; i++) { 1083 for (i = 0; i < NR_CPUS; i++) {
diff --git a/arch/i386/kernel/timers/common.c b/arch/i386/kernel/timers/common.c
index f7f90005e22e..8e201219f525 100644
--- a/arch/i386/kernel/timers/common.c
+++ b/arch/i386/kernel/timers/common.c
@@ -6,6 +6,7 @@
6#include <linux/timex.h> 6#include <linux/timex.h>
7#include <linux/errno.h> 7#include <linux/errno.h>
8#include <linux/jiffies.h> 8#include <linux/jiffies.h>
9#include <linux/module.h>
9 10
10#include <asm/io.h> 11#include <asm/io.h>
11#include <asm/timer.h> 12#include <asm/timer.h>
@@ -24,7 +25,7 @@
24 25
25#define CALIBRATE_TIME (5 * 1000020/HZ) 26#define CALIBRATE_TIME (5 * 1000020/HZ)
26 27
27unsigned long __init calibrate_tsc(void) 28unsigned long calibrate_tsc(void)
28{ 29{
29 mach_prepare_counter(); 30 mach_prepare_counter();
30 31
@@ -139,7 +140,7 @@ bad_calibration:
139#endif 140#endif
140 141
141/* calculate cpu_khz */ 142/* calculate cpu_khz */
142void __init init_cpu_khz(void) 143void init_cpu_khz(void)
143{ 144{
144 if (cpu_has_tsc) { 145 if (cpu_has_tsc) {
145 unsigned long tsc_quotient = calibrate_tsc(); 146 unsigned long tsc_quotient = calibrate_tsc();
@@ -158,3 +159,4 @@ void __init init_cpu_khz(void)
158 } 159 }
159 } 160 }
160} 161}
162
diff --git a/arch/i386/kernel/timers/timer_tsc.c b/arch/i386/kernel/timers/timer_tsc.c
index 7926d967be00..180444d87824 100644
--- a/arch/i386/kernel/timers/timer_tsc.c
+++ b/arch/i386/kernel/timers/timer_tsc.c
@@ -320,6 +320,26 @@ core_initcall(cpufreq_tsc);
320static inline void cpufreq_delayed_get(void) { return; } 320static inline void cpufreq_delayed_get(void) { return; }
321#endif 321#endif
322 322
323int recalibrate_cpu_khz(void)
324{
325#ifndef CONFIG_SMP
326 unsigned long cpu_khz_old = cpu_khz;
327
328 if (cpu_has_tsc) {
329 init_cpu_khz();
330 cpu_data[0].loops_per_jiffy =
331 cpufreq_scale(cpu_data[0].loops_per_jiffy,
332 cpu_khz_old,
333 cpu_khz);
334 return 0;
335 } else
336 return -ENODEV;
337#else
338 return -ENODEV;
339#endif
340}
341EXPORT_SYMBOL(recalibrate_cpu_khz);
342
323static void mark_offset_tsc(void) 343static void mark_offset_tsc(void)
324{ 344{
325 unsigned long lost,delay; 345 unsigned long lost,delay;
generated by cgit v1.2.2 (git 2.25.0) at 2025-12-11 04:13:44 -0500