This patch moves cpufreq driver of SPARC architecture to drivers/cpufreq.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
if SPARC64
source "drivers/cpufreq/Kconfig"
-
-config US3_FREQ
- tristate "UltraSPARC-III CPU Frequency driver"
- depends on CPU_FREQ
- select CPU_FREQ_TABLE
- help
- This adds the CPUFreq driver for UltraSPARC-III processors.
-
- For details, take a look at <file:Documentation/cpu-freq>.
-
- If in doubt, say N.
-
-config US2E_FREQ
- tristate "UltraSPARC-IIe CPU Frequency driver"
- depends on CPU_FREQ
- select CPU_FREQ_TABLE
- help
- This adds the CPUFreq driver for UltraSPARC-IIe processors.
-
- For details, take a look at <file:Documentation/cpu-freq>.
-
- If in doubt, say N.
-
endif
config US3_MC
obj-$(CONFIG_COMPAT) += sys32.o sys_sparc32.o signal32.o
-# sparc64 cpufreq
-obj-$(CONFIG_US3_FREQ) += us3_cpufreq.o
-obj-$(CONFIG_US2E_FREQ) += us2e_cpufreq.o
obj-$(CONFIG_US3_MC) += chmc.o
obj-$(CONFIG_KPROBES) += kprobes.o
+++ /dev/null
-/* us2e_cpufreq.c: UltraSPARC-IIe cpu frequency support
- *
- * Copyright (C) 2003 David S. Miller (davem@redhat.com)
- *
- * Many thanks to Dominik Brodowski for fixing up the cpufreq
- * infrastructure in order to make this driver easier to implement.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/smp.h>
-#include <linux/cpufreq.h>
-#include <linux/threads.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-
-#include <asm/asi.h>
-#include <asm/timer.h>
-
-static struct cpufreq_driver *cpufreq_us2e_driver;
-
-struct us2e_freq_percpu_info {
- struct cpufreq_frequency_table table[6];
-};
-
-/* Indexed by cpu number. */
-static struct us2e_freq_percpu_info *us2e_freq_table;
-
-#define HBIRD_MEM_CNTL0_ADDR 0x1fe0000f010UL
-#define HBIRD_ESTAR_MODE_ADDR 0x1fe0000f080UL
-
-/* UltraSPARC-IIe has five dividers: 1, 2, 4, 6, and 8. These are controlled
- * in the ESTAR mode control register.
- */
-#define ESTAR_MODE_DIV_1 0x0000000000000000UL
-#define ESTAR_MODE_DIV_2 0x0000000000000001UL
-#define ESTAR_MODE_DIV_4 0x0000000000000003UL
-#define ESTAR_MODE_DIV_6 0x0000000000000002UL
-#define ESTAR_MODE_DIV_8 0x0000000000000004UL
-#define ESTAR_MODE_DIV_MASK 0x0000000000000007UL
-
-#define MCTRL0_SREFRESH_ENAB 0x0000000000010000UL
-#define MCTRL0_REFR_COUNT_MASK 0x0000000000007f00UL
-#define MCTRL0_REFR_COUNT_SHIFT 8
-#define MCTRL0_REFR_INTERVAL 7800
-#define MCTRL0_REFR_CLKS_P_CNT 64
-
-static unsigned long read_hbreg(unsigned long addr)
-{
- unsigned long ret;
-
- __asm__ __volatile__("ldxa [%1] %2, %0"
- : "=&r" (ret)
- : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
- return ret;
-}
-
-static void write_hbreg(unsigned long addr, unsigned long val)
-{
- __asm__ __volatile__("stxa %0, [%1] %2\n\t"
- "membar #Sync"
- : /* no outputs */
- : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E)
- : "memory");
- if (addr == HBIRD_ESTAR_MODE_ADDR) {
- /* Need to wait 16 clock cycles for the PLL to lock. */
- udelay(1);
- }
-}
-
-static void self_refresh_ctl(int enable)
-{
- unsigned long mctrl = read_hbreg(HBIRD_MEM_CNTL0_ADDR);
-
- if (enable)
- mctrl |= MCTRL0_SREFRESH_ENAB;
- else
- mctrl &= ~MCTRL0_SREFRESH_ENAB;
- write_hbreg(HBIRD_MEM_CNTL0_ADDR, mctrl);
- (void) read_hbreg(HBIRD_MEM_CNTL0_ADDR);
-}
-
-static void frob_mem_refresh(int cpu_slowing_down,
- unsigned long clock_tick,
- unsigned long old_divisor, unsigned long divisor)
-{
- unsigned long old_refr_count, refr_count, mctrl;
-
- refr_count = (clock_tick * MCTRL0_REFR_INTERVAL);
- refr_count /= (MCTRL0_REFR_CLKS_P_CNT * divisor * 1000000000UL);
-
- mctrl = read_hbreg(HBIRD_MEM_CNTL0_ADDR);
- old_refr_count = (mctrl & MCTRL0_REFR_COUNT_MASK)
- >> MCTRL0_REFR_COUNT_SHIFT;
-
- mctrl &= ~MCTRL0_REFR_COUNT_MASK;
- mctrl |= refr_count << MCTRL0_REFR_COUNT_SHIFT;
- write_hbreg(HBIRD_MEM_CNTL0_ADDR, mctrl);
- mctrl = read_hbreg(HBIRD_MEM_CNTL0_ADDR);
-
- if (cpu_slowing_down && !(mctrl & MCTRL0_SREFRESH_ENAB)) {
- unsigned long usecs;
-
- /* We have to wait for both refresh counts (old
- * and new) to go to zero.
- */
- usecs = (MCTRL0_REFR_CLKS_P_CNT *
- (refr_count + old_refr_count) *
- 1000000UL *
- old_divisor) / clock_tick;
- udelay(usecs + 1UL);
- }
-}
-
-static void us2e_transition(unsigned long estar, unsigned long new_bits,
- unsigned long clock_tick,
- unsigned long old_divisor, unsigned long divisor)
-{
- unsigned long flags;
-
- local_irq_save(flags);
-
- estar &= ~ESTAR_MODE_DIV_MASK;
-
- /* This is based upon the state transition diagram in the IIe manual. */
- if (old_divisor == 2 && divisor == 1) {
- self_refresh_ctl(0);
- write_hbreg(HBIRD_ESTAR_MODE_ADDR, estar | new_bits);
- frob_mem_refresh(0, clock_tick, old_divisor, divisor);
- } else if (old_divisor == 1 && divisor == 2) {
- frob_mem_refresh(1, clock_tick, old_divisor, divisor);
- write_hbreg(HBIRD_ESTAR_MODE_ADDR, estar | new_bits);
- self_refresh_ctl(1);
- } else if (old_divisor == 1 && divisor > 2) {
- us2e_transition(estar, ESTAR_MODE_DIV_2, clock_tick,
- 1, 2);
- us2e_transition(estar, new_bits, clock_tick,
- 2, divisor);
- } else if (old_divisor > 2 && divisor == 1) {
- us2e_transition(estar, ESTAR_MODE_DIV_2, clock_tick,
- old_divisor, 2);
- us2e_transition(estar, new_bits, clock_tick,
- 2, divisor);
- } else if (old_divisor < divisor) {
- frob_mem_refresh(0, clock_tick, old_divisor, divisor);
- write_hbreg(HBIRD_ESTAR_MODE_ADDR, estar | new_bits);
- } else if (old_divisor > divisor) {
- write_hbreg(HBIRD_ESTAR_MODE_ADDR, estar | new_bits);
- frob_mem_refresh(1, clock_tick, old_divisor, divisor);
- } else {
- BUG();
- }
-
- local_irq_restore(flags);
-}
-
-static unsigned long index_to_estar_mode(unsigned int index)
-{
- switch (index) {
- case 0:
- return ESTAR_MODE_DIV_1;
-
- case 1:
- return ESTAR_MODE_DIV_2;
-
- case 2:
- return ESTAR_MODE_DIV_4;
-
- case 3:
- return ESTAR_MODE_DIV_6;
-
- case 4:
- return ESTAR_MODE_DIV_8;
-
- default:
- BUG();
- }
-}
-
-static unsigned long index_to_divisor(unsigned int index)
-{
- switch (index) {
- case 0:
- return 1;
-
- case 1:
- return 2;
-
- case 2:
- return 4;
-
- case 3:
- return 6;
-
- case 4:
- return 8;
-
- default:
- BUG();
- }
-}
-
-static unsigned long estar_to_divisor(unsigned long estar)
-{
- unsigned long ret;
-
- switch (estar & ESTAR_MODE_DIV_MASK) {
- case ESTAR_MODE_DIV_1:
- ret = 1;
- break;
- case ESTAR_MODE_DIV_2:
- ret = 2;
- break;
- case ESTAR_MODE_DIV_4:
- ret = 4;
- break;
- case ESTAR_MODE_DIV_6:
- ret = 6;
- break;
- case ESTAR_MODE_DIV_8:
- ret = 8;
- break;
- default:
- BUG();
- }
-
- return ret;
-}
-
-static unsigned int us2e_freq_get(unsigned int cpu)
-{
- cpumask_t cpus_allowed;
- unsigned long clock_tick, estar;
-
- cpumask_copy(&cpus_allowed, tsk_cpus_allowed(current));
- set_cpus_allowed_ptr(current, cpumask_of(cpu));
-
- clock_tick = sparc64_get_clock_tick(cpu) / 1000;
- estar = read_hbreg(HBIRD_ESTAR_MODE_ADDR);
-
- set_cpus_allowed_ptr(current, &cpus_allowed);
-
- return clock_tick / estar_to_divisor(estar);
-}
-
-static void us2e_set_cpu_divider_index(struct cpufreq_policy *policy,
- unsigned int index)
-{
- unsigned int cpu = policy->cpu;
- unsigned long new_bits, new_freq;
- unsigned long clock_tick, divisor, old_divisor, estar;
- cpumask_t cpus_allowed;
- struct cpufreq_freqs freqs;
-
- cpumask_copy(&cpus_allowed, tsk_cpus_allowed(current));
- set_cpus_allowed_ptr(current, cpumask_of(cpu));
-
- new_freq = clock_tick = sparc64_get_clock_tick(cpu) / 1000;
- new_bits = index_to_estar_mode(index);
- divisor = index_to_divisor(index);
- new_freq /= divisor;
-
- estar = read_hbreg(HBIRD_ESTAR_MODE_ADDR);
-
- old_divisor = estar_to_divisor(estar);
-
- freqs.old = clock_tick / old_divisor;
- freqs.new = new_freq;
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
-
- if (old_divisor != divisor)
- us2e_transition(estar, new_bits, clock_tick * 1000,
- old_divisor, divisor);
-
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
-
- set_cpus_allowed_ptr(current, &cpus_allowed);
-}
-
-static int us2e_freq_target(struct cpufreq_policy *policy,
- unsigned int target_freq,
- unsigned int relation)
-{
- unsigned int new_index = 0;
-
- if (cpufreq_frequency_table_target(policy,
- &us2e_freq_table[policy->cpu].table[0],
- target_freq, relation, &new_index))
- return -EINVAL;
-
- us2e_set_cpu_divider_index(policy, new_index);
-
- return 0;
-}
-
-static int us2e_freq_verify(struct cpufreq_policy *policy)
-{
- return cpufreq_frequency_table_verify(policy,
- &us2e_freq_table[policy->cpu].table[0]);
-}
-
-static int __init us2e_freq_cpu_init(struct cpufreq_policy *policy)
-{
- unsigned int cpu = policy->cpu;
- unsigned long clock_tick = sparc64_get_clock_tick(cpu) / 1000;
- struct cpufreq_frequency_table *table =
- &us2e_freq_table[cpu].table[0];
-
- table[0].index = 0;
- table[0].frequency = clock_tick / 1;
- table[1].index = 1;
- table[1].frequency = clock_tick / 2;
- table[2].index = 2;
- table[2].frequency = clock_tick / 4;
- table[2].index = 3;
- table[2].frequency = clock_tick / 6;
- table[2].index = 4;
- table[2].frequency = clock_tick / 8;
- table[2].index = 5;
- table[3].frequency = CPUFREQ_TABLE_END;
-
- policy->cpuinfo.transition_latency = 0;
- policy->cur = clock_tick;
-
- return cpufreq_frequency_table_cpuinfo(policy, table);
-}
-
-static int us2e_freq_cpu_exit(struct cpufreq_policy *policy)
-{
- if (cpufreq_us2e_driver)
- us2e_set_cpu_divider_index(policy, 0);
-
- return 0;
-}
-
-static int __init us2e_freq_init(void)
-{
- unsigned long manuf, impl, ver;
- int ret;
-
- if (tlb_type != spitfire)
- return -ENODEV;
-
- __asm__("rdpr %%ver, %0" : "=r" (ver));
- manuf = ((ver >> 48) & 0xffff);
- impl = ((ver >> 32) & 0xffff);
-
- if (manuf == 0x17 && impl == 0x13) {
- struct cpufreq_driver *driver;
-
- ret = -ENOMEM;
- driver = kzalloc(sizeof(struct cpufreq_driver), GFP_KERNEL);
- if (!driver)
- goto err_out;
-
- us2e_freq_table = kzalloc(
- (NR_CPUS * sizeof(struct us2e_freq_percpu_info)),
- GFP_KERNEL);
- if (!us2e_freq_table)
- goto err_out;
-
- driver->init = us2e_freq_cpu_init;
- driver->verify = us2e_freq_verify;
- driver->target = us2e_freq_target;
- driver->get = us2e_freq_get;
- driver->exit = us2e_freq_cpu_exit;
- driver->owner = THIS_MODULE,
- strcpy(driver->name, "UltraSPARC-IIe");
-
- cpufreq_us2e_driver = driver;
- ret = cpufreq_register_driver(driver);
- if (ret)
- goto err_out;
-
- return 0;
-
-err_out:
- if (driver) {
- kfree(driver);
- cpufreq_us2e_driver = NULL;
- }
- kfree(us2e_freq_table);
- us2e_freq_table = NULL;
- return ret;
- }
-
- return -ENODEV;
-}
-
-static void __exit us2e_freq_exit(void)
-{
- if (cpufreq_us2e_driver) {
- cpufreq_unregister_driver(cpufreq_us2e_driver);
- kfree(cpufreq_us2e_driver);
- cpufreq_us2e_driver = NULL;
- kfree(us2e_freq_table);
- us2e_freq_table = NULL;
- }
-}
-
-MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
-MODULE_DESCRIPTION("cpufreq driver for UltraSPARC-IIe");
-MODULE_LICENSE("GPL");
-
-module_init(us2e_freq_init);
-module_exit(us2e_freq_exit);
+++ /dev/null
-/* us3_cpufreq.c: UltraSPARC-III cpu frequency support
- *
- * Copyright (C) 2003 David S. Miller (davem@redhat.com)
- *
- * Many thanks to Dominik Brodowski for fixing up the cpufreq
- * infrastructure in order to make this driver easier to implement.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/smp.h>
-#include <linux/cpufreq.h>
-#include <linux/threads.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-
-#include <asm/head.h>
-#include <asm/timer.h>
-
-static struct cpufreq_driver *cpufreq_us3_driver;
-
-struct us3_freq_percpu_info {
- struct cpufreq_frequency_table table[4];
-};
-
-/* Indexed by cpu number. */
-static struct us3_freq_percpu_info *us3_freq_table;
-
-/* UltraSPARC-III has three dividers: 1, 2, and 32. These are controlled
- * in the Safari config register.
- */
-#define SAFARI_CFG_DIV_1 0x0000000000000000UL
-#define SAFARI_CFG_DIV_2 0x0000000040000000UL
-#define SAFARI_CFG_DIV_32 0x0000000080000000UL
-#define SAFARI_CFG_DIV_MASK 0x00000000C0000000UL
-
-static unsigned long read_safari_cfg(void)
-{
- unsigned long ret;
-
- __asm__ __volatile__("ldxa [%%g0] %1, %0"
- : "=&r" (ret)
- : "i" (ASI_SAFARI_CONFIG));
- return ret;
-}
-
-static void write_safari_cfg(unsigned long val)
-{
- __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
- "membar #Sync"
- : /* no outputs */
- : "r" (val), "i" (ASI_SAFARI_CONFIG)
- : "memory");
-}
-
-static unsigned long get_current_freq(unsigned int cpu, unsigned long safari_cfg)
-{
- unsigned long clock_tick = sparc64_get_clock_tick(cpu) / 1000;
- unsigned long ret;
-
- switch (safari_cfg & SAFARI_CFG_DIV_MASK) {
- case SAFARI_CFG_DIV_1:
- ret = clock_tick / 1;
- break;
- case SAFARI_CFG_DIV_2:
- ret = clock_tick / 2;
- break;
- case SAFARI_CFG_DIV_32:
- ret = clock_tick / 32;
- break;
- default:
- BUG();
- }
-
- return ret;
-}
-
-static unsigned int us3_freq_get(unsigned int cpu)
-{
- cpumask_t cpus_allowed;
- unsigned long reg;
- unsigned int ret;
-
- cpumask_copy(&cpus_allowed, tsk_cpus_allowed(current));
- set_cpus_allowed_ptr(current, cpumask_of(cpu));
-
- reg = read_safari_cfg();
- ret = get_current_freq(cpu, reg);
-
- set_cpus_allowed_ptr(current, &cpus_allowed);
-
- return ret;
-}
-
-static void us3_set_cpu_divider_index(struct cpufreq_policy *policy,
- unsigned int index)
-{
- unsigned int cpu = policy->cpu;
- unsigned long new_bits, new_freq, reg;
- cpumask_t cpus_allowed;
- struct cpufreq_freqs freqs;
-
- cpumask_copy(&cpus_allowed, tsk_cpus_allowed(current));
- set_cpus_allowed_ptr(current, cpumask_of(cpu));
-
- new_freq = sparc64_get_clock_tick(cpu) / 1000;
- switch (index) {
- case 0:
- new_bits = SAFARI_CFG_DIV_1;
- new_freq /= 1;
- break;
- case 1:
- new_bits = SAFARI_CFG_DIV_2;
- new_freq /= 2;
- break;
- case 2:
- new_bits = SAFARI_CFG_DIV_32;
- new_freq /= 32;
- break;
-
- default:
- BUG();
- }
-
- reg = read_safari_cfg();
-
- freqs.old = get_current_freq(cpu, reg);
- freqs.new = new_freq;
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
-
- reg &= ~SAFARI_CFG_DIV_MASK;
- reg |= new_bits;
- write_safari_cfg(reg);
-
- cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
-
- set_cpus_allowed_ptr(current, &cpus_allowed);
-}
-
-static int us3_freq_target(struct cpufreq_policy *policy,
- unsigned int target_freq,
- unsigned int relation)
-{
- unsigned int new_index = 0;
-
- if (cpufreq_frequency_table_target(policy,
- &us3_freq_table[policy->cpu].table[0],
- target_freq,
- relation,
- &new_index))
- return -EINVAL;
-
- us3_set_cpu_divider_index(policy, new_index);
-
- return 0;
-}
-
-static int us3_freq_verify(struct cpufreq_policy *policy)
-{
- return cpufreq_frequency_table_verify(policy,
- &us3_freq_table[policy->cpu].table[0]);
-}
-
-static int __init us3_freq_cpu_init(struct cpufreq_policy *policy)
-{
- unsigned int cpu = policy->cpu;
- unsigned long clock_tick = sparc64_get_clock_tick(cpu) / 1000;
- struct cpufreq_frequency_table *table =
- &us3_freq_table[cpu].table[0];
-
- table[0].index = 0;
- table[0].frequency = clock_tick / 1;
- table[1].index = 1;
- table[1].frequency = clock_tick / 2;
- table[2].index = 2;
- table[2].frequency = clock_tick / 32;
- table[3].index = 0;
- table[3].frequency = CPUFREQ_TABLE_END;
-
- policy->cpuinfo.transition_latency = 0;
- policy->cur = clock_tick;
-
- return cpufreq_frequency_table_cpuinfo(policy, table);
-}
-
-static int us3_freq_cpu_exit(struct cpufreq_policy *policy)
-{
- if (cpufreq_us3_driver)
- us3_set_cpu_divider_index(policy, 0);
-
- return 0;
-}
-
-static int __init us3_freq_init(void)
-{
- unsigned long manuf, impl, ver;
- int ret;
-
- if (tlb_type != cheetah && tlb_type != cheetah_plus)
- return -ENODEV;
-
- __asm__("rdpr %%ver, %0" : "=r" (ver));
- manuf = ((ver >> 48) & 0xffff);
- impl = ((ver >> 32) & 0xffff);
-
- if (manuf == CHEETAH_MANUF &&
- (impl == CHEETAH_IMPL ||
- impl == CHEETAH_PLUS_IMPL ||
- impl == JAGUAR_IMPL ||
- impl == PANTHER_IMPL)) {
- struct cpufreq_driver *driver;
-
- ret = -ENOMEM;
- driver = kzalloc(sizeof(struct cpufreq_driver), GFP_KERNEL);
- if (!driver)
- goto err_out;
-
- us3_freq_table = kzalloc(
- (NR_CPUS * sizeof(struct us3_freq_percpu_info)),
- GFP_KERNEL);
- if (!us3_freq_table)
- goto err_out;
-
- driver->init = us3_freq_cpu_init;
- driver->verify = us3_freq_verify;
- driver->target = us3_freq_target;
- driver->get = us3_freq_get;
- driver->exit = us3_freq_cpu_exit;
- driver->owner = THIS_MODULE,
- strcpy(driver->name, "UltraSPARC-III");
-
- cpufreq_us3_driver = driver;
- ret = cpufreq_register_driver(driver);
- if (ret)
- goto err_out;
-
- return 0;
-
-err_out:
- if (driver) {
- kfree(driver);
- cpufreq_us3_driver = NULL;
- }
- kfree(us3_freq_table);
- us3_freq_table = NULL;
- return ret;
- }
-
- return -ENODEV;
-}
-
-static void __exit us3_freq_exit(void)
-{
- if (cpufreq_us3_driver) {
- cpufreq_unregister_driver(cpufreq_us3_driver);
- kfree(cpufreq_us3_driver);
- cpufreq_us3_driver = NULL;
- kfree(us3_freq_table);
- us3_freq_table = NULL;
- }
-}
-
-MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
-MODULE_DESCRIPTION("cpufreq driver for UltraSPARC-III");
-MODULE_LICENSE("GPL");
-
-module_init(us3_freq_init);
-module_exit(us3_freq_exit);
source "drivers/cpufreq/Kconfig.powerpc"
endmenu
+menu "SPARC CPU frequency scaling drivers"
+depends on SPARC64
+config SPARC_US3_CPUFREQ
+ tristate "UltraSPARC-III CPU Frequency driver"
+ select CPU_FREQ_TABLE
+ help
+ This adds the CPUFreq driver for UltraSPARC-III processors.
+
+ For details, take a look at <file:Documentation/cpu-freq>.
+
+ If in doubt, say N.
+
+config SPARC_US2E_CPUFREQ
+ tristate "UltraSPARC-IIe CPU Frequency driver"
+ select CPU_FREQ_TABLE
+ help
+ This adds the CPUFreq driver for UltraSPARC-IIe processors.
+
+ For details, take a look at <file:Documentation/cpu-freq>.
+
+ If in doubt, say N.
+endmenu
+
menu "SH CPU Frequency scaling"
depends on SUPERH
config SH_CPU_FREQ
obj-$(CONFIG_IA64_ACPI_CPUFREQ) += ia64-acpi-cpufreq.o
obj-$(CONFIG_LOONGSON2_CPUFREQ) += loongson2_cpufreq.o
obj-$(CONFIG_SH_CPU_FREQ) += sh-cpufreq.o
+obj-$(CONFIG_SPARC_US2E_CPUFREQ) += sparc-us2e-cpufreq.o
+obj-$(CONFIG_SPARC_US3_CPUFREQ) += sparc-us3-cpufreq.o
obj-$(CONFIG_UNICORE32) += unicore2-cpufreq.o
--- /dev/null
+/* us2e_cpufreq.c: UltraSPARC-IIe cpu frequency support
+ *
+ * Copyright (C) 2003 David S. Miller (davem@redhat.com)
+ *
+ * Many thanks to Dominik Brodowski for fixing up the cpufreq
+ * infrastructure in order to make this driver easier to implement.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+#include <linux/cpufreq.h>
+#include <linux/threads.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+
+#include <asm/asi.h>
+#include <asm/timer.h>
+
+static struct cpufreq_driver *cpufreq_us2e_driver;
+
+struct us2e_freq_percpu_info {
+ struct cpufreq_frequency_table table[6];
+};
+
+/* Indexed by cpu number. */
+static struct us2e_freq_percpu_info *us2e_freq_table;
+
+#define HBIRD_MEM_CNTL0_ADDR 0x1fe0000f010UL
+#define HBIRD_ESTAR_MODE_ADDR 0x1fe0000f080UL
+
+/* UltraSPARC-IIe has five dividers: 1, 2, 4, 6, and 8. These are controlled
+ * in the ESTAR mode control register.
+ */
+#define ESTAR_MODE_DIV_1 0x0000000000000000UL
+#define ESTAR_MODE_DIV_2 0x0000000000000001UL
+#define ESTAR_MODE_DIV_4 0x0000000000000003UL
+#define ESTAR_MODE_DIV_6 0x0000000000000002UL
+#define ESTAR_MODE_DIV_8 0x0000000000000004UL
+#define ESTAR_MODE_DIV_MASK 0x0000000000000007UL
+
+#define MCTRL0_SREFRESH_ENAB 0x0000000000010000UL
+#define MCTRL0_REFR_COUNT_MASK 0x0000000000007f00UL
+#define MCTRL0_REFR_COUNT_SHIFT 8
+#define MCTRL0_REFR_INTERVAL 7800
+#define MCTRL0_REFR_CLKS_P_CNT 64
+
+static unsigned long read_hbreg(unsigned long addr)
+{
+ unsigned long ret;
+
+ __asm__ __volatile__("ldxa [%1] %2, %0"
+ : "=&r" (ret)
+ : "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E));
+ return ret;
+}
+
+static void write_hbreg(unsigned long addr, unsigned long val)
+{
+ __asm__ __volatile__("stxa %0, [%1] %2\n\t"
+ "membar #Sync"
+ : /* no outputs */
+ : "r" (val), "r" (addr), "i" (ASI_PHYS_BYPASS_EC_E)
+ : "memory");
+ if (addr == HBIRD_ESTAR_MODE_ADDR) {
+ /* Need to wait 16 clock cycles for the PLL to lock. */
+ udelay(1);
+ }
+}
+
+static void self_refresh_ctl(int enable)
+{
+ unsigned long mctrl = read_hbreg(HBIRD_MEM_CNTL0_ADDR);
+
+ if (enable)
+ mctrl |= MCTRL0_SREFRESH_ENAB;
+ else
+ mctrl &= ~MCTRL0_SREFRESH_ENAB;
+ write_hbreg(HBIRD_MEM_CNTL0_ADDR, mctrl);
+ (void) read_hbreg(HBIRD_MEM_CNTL0_ADDR);
+}
+
+static void frob_mem_refresh(int cpu_slowing_down,
+ unsigned long clock_tick,
+ unsigned long old_divisor, unsigned long divisor)
+{
+ unsigned long old_refr_count, refr_count, mctrl;
+
+ refr_count = (clock_tick * MCTRL0_REFR_INTERVAL);
+ refr_count /= (MCTRL0_REFR_CLKS_P_CNT * divisor * 1000000000UL);
+
+ mctrl = read_hbreg(HBIRD_MEM_CNTL0_ADDR);
+ old_refr_count = (mctrl & MCTRL0_REFR_COUNT_MASK)
+ >> MCTRL0_REFR_COUNT_SHIFT;
+
+ mctrl &= ~MCTRL0_REFR_COUNT_MASK;
+ mctrl |= refr_count << MCTRL0_REFR_COUNT_SHIFT;
+ write_hbreg(HBIRD_MEM_CNTL0_ADDR, mctrl);
+ mctrl = read_hbreg(HBIRD_MEM_CNTL0_ADDR);
+
+ if (cpu_slowing_down && !(mctrl & MCTRL0_SREFRESH_ENAB)) {
+ unsigned long usecs;
+
+ /* We have to wait for both refresh counts (old
+ * and new) to go to zero.
+ */
+ usecs = (MCTRL0_REFR_CLKS_P_CNT *
+ (refr_count + old_refr_count) *
+ 1000000UL *
+ old_divisor) / clock_tick;
+ udelay(usecs + 1UL);
+ }
+}
+
+static void us2e_transition(unsigned long estar, unsigned long new_bits,
+ unsigned long clock_tick,
+ unsigned long old_divisor, unsigned long divisor)
+{
+ unsigned long flags;
+
+ local_irq_save(flags);
+
+ estar &= ~ESTAR_MODE_DIV_MASK;
+
+ /* This is based upon the state transition diagram in the IIe manual. */
+ if (old_divisor == 2 && divisor == 1) {
+ self_refresh_ctl(0);
+ write_hbreg(HBIRD_ESTAR_MODE_ADDR, estar | new_bits);
+ frob_mem_refresh(0, clock_tick, old_divisor, divisor);
+ } else if (old_divisor == 1 && divisor == 2) {
+ frob_mem_refresh(1, clock_tick, old_divisor, divisor);
+ write_hbreg(HBIRD_ESTAR_MODE_ADDR, estar | new_bits);
+ self_refresh_ctl(1);
+ } else if (old_divisor == 1 && divisor > 2) {
+ us2e_transition(estar, ESTAR_MODE_DIV_2, clock_tick,
+ 1, 2);
+ us2e_transition(estar, new_bits, clock_tick,
+ 2, divisor);
+ } else if (old_divisor > 2 && divisor == 1) {
+ us2e_transition(estar, ESTAR_MODE_DIV_2, clock_tick,
+ old_divisor, 2);
+ us2e_transition(estar, new_bits, clock_tick,
+ 2, divisor);
+ } else if (old_divisor < divisor) {
+ frob_mem_refresh(0, clock_tick, old_divisor, divisor);
+ write_hbreg(HBIRD_ESTAR_MODE_ADDR, estar | new_bits);
+ } else if (old_divisor > divisor) {
+ write_hbreg(HBIRD_ESTAR_MODE_ADDR, estar | new_bits);
+ frob_mem_refresh(1, clock_tick, old_divisor, divisor);
+ } else {
+ BUG();
+ }
+
+ local_irq_restore(flags);
+}
+
+static unsigned long index_to_estar_mode(unsigned int index)
+{
+ switch (index) {
+ case 0:
+ return ESTAR_MODE_DIV_1;
+
+ case 1:
+ return ESTAR_MODE_DIV_2;
+
+ case 2:
+ return ESTAR_MODE_DIV_4;
+
+ case 3:
+ return ESTAR_MODE_DIV_6;
+
+ case 4:
+ return ESTAR_MODE_DIV_8;
+
+ default:
+ BUG();
+ }
+}
+
+static unsigned long index_to_divisor(unsigned int index)
+{
+ switch (index) {
+ case 0:
+ return 1;
+
+ case 1:
+ return 2;
+
+ case 2:
+ return 4;
+
+ case 3:
+ return 6;
+
+ case 4:
+ return 8;
+
+ default:
+ BUG();
+ }
+}
+
+static unsigned long estar_to_divisor(unsigned long estar)
+{
+ unsigned long ret;
+
+ switch (estar & ESTAR_MODE_DIV_MASK) {
+ case ESTAR_MODE_DIV_1:
+ ret = 1;
+ break;
+ case ESTAR_MODE_DIV_2:
+ ret = 2;
+ break;
+ case ESTAR_MODE_DIV_4:
+ ret = 4;
+ break;
+ case ESTAR_MODE_DIV_6:
+ ret = 6;
+ break;
+ case ESTAR_MODE_DIV_8:
+ ret = 8;
+ break;
+ default:
+ BUG();
+ }
+
+ return ret;
+}
+
+static unsigned int us2e_freq_get(unsigned int cpu)
+{
+ cpumask_t cpus_allowed;
+ unsigned long clock_tick, estar;
+
+ cpumask_copy(&cpus_allowed, tsk_cpus_allowed(current));
+ set_cpus_allowed_ptr(current, cpumask_of(cpu));
+
+ clock_tick = sparc64_get_clock_tick(cpu) / 1000;
+ estar = read_hbreg(HBIRD_ESTAR_MODE_ADDR);
+
+ set_cpus_allowed_ptr(current, &cpus_allowed);
+
+ return clock_tick / estar_to_divisor(estar);
+}
+
+static void us2e_set_cpu_divider_index(struct cpufreq_policy *policy,
+ unsigned int index)
+{
+ unsigned int cpu = policy->cpu;
+ unsigned long new_bits, new_freq;
+ unsigned long clock_tick, divisor, old_divisor, estar;
+ cpumask_t cpus_allowed;
+ struct cpufreq_freqs freqs;
+
+ cpumask_copy(&cpus_allowed, tsk_cpus_allowed(current));
+ set_cpus_allowed_ptr(current, cpumask_of(cpu));
+
+ new_freq = clock_tick = sparc64_get_clock_tick(cpu) / 1000;
+ new_bits = index_to_estar_mode(index);
+ divisor = index_to_divisor(index);
+ new_freq /= divisor;
+
+ estar = read_hbreg(HBIRD_ESTAR_MODE_ADDR);
+
+ old_divisor = estar_to_divisor(estar);
+
+ freqs.old = clock_tick / old_divisor;
+ freqs.new = new_freq;
+ cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
+
+ if (old_divisor != divisor)
+ us2e_transition(estar, new_bits, clock_tick * 1000,
+ old_divisor, divisor);
+
+ cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
+
+ set_cpus_allowed_ptr(current, &cpus_allowed);
+}
+
+static int us2e_freq_target(struct cpufreq_policy *policy,
+ unsigned int target_freq,
+ unsigned int relation)
+{
+ unsigned int new_index = 0;
+
+ if (cpufreq_frequency_table_target(policy,
+ &us2e_freq_table[policy->cpu].table[0],
+ target_freq, relation, &new_index))
+ return -EINVAL;
+
+ us2e_set_cpu_divider_index(policy, new_index);
+
+ return 0;
+}
+
+static int us2e_freq_verify(struct cpufreq_policy *policy)
+{
+ return cpufreq_frequency_table_verify(policy,
+ &us2e_freq_table[policy->cpu].table[0]);
+}
+
+static int __init us2e_freq_cpu_init(struct cpufreq_policy *policy)
+{
+ unsigned int cpu = policy->cpu;
+ unsigned long clock_tick = sparc64_get_clock_tick(cpu) / 1000;
+ struct cpufreq_frequency_table *table =
+ &us2e_freq_table[cpu].table[0];
+
+ table[0].index = 0;
+ table[0].frequency = clock_tick / 1;
+ table[1].index = 1;
+ table[1].frequency = clock_tick / 2;
+ table[2].index = 2;
+ table[2].frequency = clock_tick / 4;
+ table[2].index = 3;
+ table[2].frequency = clock_tick / 6;
+ table[2].index = 4;
+ table[2].frequency = clock_tick / 8;
+ table[2].index = 5;
+ table[3].frequency = CPUFREQ_TABLE_END;
+
+ policy->cpuinfo.transition_latency = 0;
+ policy->cur = clock_tick;
+
+ return cpufreq_frequency_table_cpuinfo(policy, table);
+}
+
+static int us2e_freq_cpu_exit(struct cpufreq_policy *policy)
+{
+ if (cpufreq_us2e_driver)
+ us2e_set_cpu_divider_index(policy, 0);
+
+ return 0;
+}
+
+static int __init us2e_freq_init(void)
+{
+ unsigned long manuf, impl, ver;
+ int ret;
+
+ if (tlb_type != spitfire)
+ return -ENODEV;
+
+ __asm__("rdpr %%ver, %0" : "=r" (ver));
+ manuf = ((ver >> 48) & 0xffff);
+ impl = ((ver >> 32) & 0xffff);
+
+ if (manuf == 0x17 && impl == 0x13) {
+ struct cpufreq_driver *driver;
+
+ ret = -ENOMEM;
+ driver = kzalloc(sizeof(struct cpufreq_driver), GFP_KERNEL);
+ if (!driver)
+ goto err_out;
+
+ us2e_freq_table = kzalloc(
+ (NR_CPUS * sizeof(struct us2e_freq_percpu_info)),
+ GFP_KERNEL);
+ if (!us2e_freq_table)
+ goto err_out;
+
+ driver->init = us2e_freq_cpu_init;
+ driver->verify = us2e_freq_verify;
+ driver->target = us2e_freq_target;
+ driver->get = us2e_freq_get;
+ driver->exit = us2e_freq_cpu_exit;
+ driver->owner = THIS_MODULE,
+ strcpy(driver->name, "UltraSPARC-IIe");
+
+ cpufreq_us2e_driver = driver;
+ ret = cpufreq_register_driver(driver);
+ if (ret)
+ goto err_out;
+
+ return 0;
+
+err_out:
+ if (driver) {
+ kfree(driver);
+ cpufreq_us2e_driver = NULL;
+ }
+ kfree(us2e_freq_table);
+ us2e_freq_table = NULL;
+ return ret;
+ }
+
+ return -ENODEV;
+}
+
+static void __exit us2e_freq_exit(void)
+{
+ if (cpufreq_us2e_driver) {
+ cpufreq_unregister_driver(cpufreq_us2e_driver);
+ kfree(cpufreq_us2e_driver);
+ cpufreq_us2e_driver = NULL;
+ kfree(us2e_freq_table);
+ us2e_freq_table = NULL;
+ }
+}
+
+MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
+MODULE_DESCRIPTION("cpufreq driver for UltraSPARC-IIe");
+MODULE_LICENSE("GPL");
+
+module_init(us2e_freq_init);
+module_exit(us2e_freq_exit);
--- /dev/null
+/* us3_cpufreq.c: UltraSPARC-III cpu frequency support
+ *
+ * Copyright (C) 2003 David S. Miller (davem@redhat.com)
+ *
+ * Many thanks to Dominik Brodowski for fixing up the cpufreq
+ * infrastructure in order to make this driver easier to implement.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+#include <linux/cpufreq.h>
+#include <linux/threads.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+
+#include <asm/head.h>
+#include <asm/timer.h>
+
+static struct cpufreq_driver *cpufreq_us3_driver;
+
+struct us3_freq_percpu_info {
+ struct cpufreq_frequency_table table[4];
+};
+
+/* Indexed by cpu number. */
+static struct us3_freq_percpu_info *us3_freq_table;
+
+/* UltraSPARC-III has three dividers: 1, 2, and 32. These are controlled
+ * in the Safari config register.
+ */
+#define SAFARI_CFG_DIV_1 0x0000000000000000UL
+#define SAFARI_CFG_DIV_2 0x0000000040000000UL
+#define SAFARI_CFG_DIV_32 0x0000000080000000UL
+#define SAFARI_CFG_DIV_MASK 0x00000000C0000000UL
+
+static unsigned long read_safari_cfg(void)
+{
+ unsigned long ret;
+
+ __asm__ __volatile__("ldxa [%%g0] %1, %0"
+ : "=&r" (ret)
+ : "i" (ASI_SAFARI_CONFIG));
+ return ret;
+}
+
+static void write_safari_cfg(unsigned long val)
+{
+ __asm__ __volatile__("stxa %0, [%%g0] %1\n\t"
+ "membar #Sync"
+ : /* no outputs */
+ : "r" (val), "i" (ASI_SAFARI_CONFIG)
+ : "memory");
+}
+
+static unsigned long get_current_freq(unsigned int cpu, unsigned long safari_cfg)
+{
+ unsigned long clock_tick = sparc64_get_clock_tick(cpu) / 1000;
+ unsigned long ret;
+
+ switch (safari_cfg & SAFARI_CFG_DIV_MASK) {
+ case SAFARI_CFG_DIV_1:
+ ret = clock_tick / 1;
+ break;
+ case SAFARI_CFG_DIV_2:
+ ret = clock_tick / 2;
+ break;
+ case SAFARI_CFG_DIV_32:
+ ret = clock_tick / 32;
+ break;
+ default:
+ BUG();
+ }
+
+ return ret;
+}
+
+static unsigned int us3_freq_get(unsigned int cpu)
+{
+ cpumask_t cpus_allowed;
+ unsigned long reg;
+ unsigned int ret;
+
+ cpumask_copy(&cpus_allowed, tsk_cpus_allowed(current));
+ set_cpus_allowed_ptr(current, cpumask_of(cpu));
+
+ reg = read_safari_cfg();
+ ret = get_current_freq(cpu, reg);
+
+ set_cpus_allowed_ptr(current, &cpus_allowed);
+
+ return ret;
+}
+
+static void us3_set_cpu_divider_index(struct cpufreq_policy *policy,
+ unsigned int index)
+{
+ unsigned int cpu = policy->cpu;
+ unsigned long new_bits, new_freq, reg;
+ cpumask_t cpus_allowed;
+ struct cpufreq_freqs freqs;
+
+ cpumask_copy(&cpus_allowed, tsk_cpus_allowed(current));
+ set_cpus_allowed_ptr(current, cpumask_of(cpu));
+
+ new_freq = sparc64_get_clock_tick(cpu) / 1000;
+ switch (index) {
+ case 0:
+ new_bits = SAFARI_CFG_DIV_1;
+ new_freq /= 1;
+ break;
+ case 1:
+ new_bits = SAFARI_CFG_DIV_2;
+ new_freq /= 2;
+ break;
+ case 2:
+ new_bits = SAFARI_CFG_DIV_32;
+ new_freq /= 32;
+ break;
+
+ default:
+ BUG();
+ }
+
+ reg = read_safari_cfg();
+
+ freqs.old = get_current_freq(cpu, reg);
+ freqs.new = new_freq;
+ cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE);
+
+ reg &= ~SAFARI_CFG_DIV_MASK;
+ reg |= new_bits;
+ write_safari_cfg(reg);
+
+ cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
+
+ set_cpus_allowed_ptr(current, &cpus_allowed);
+}
+
+static int us3_freq_target(struct cpufreq_policy *policy,
+ unsigned int target_freq,
+ unsigned int relation)
+{
+ unsigned int new_index = 0;
+
+ if (cpufreq_frequency_table_target(policy,
+ &us3_freq_table[policy->cpu].table[0],
+ target_freq,
+ relation,
+ &new_index))
+ return -EINVAL;
+
+ us3_set_cpu_divider_index(policy, new_index);
+
+ return 0;
+}
+
+static int us3_freq_verify(struct cpufreq_policy *policy)
+{
+ return cpufreq_frequency_table_verify(policy,
+ &us3_freq_table[policy->cpu].table[0]);
+}
+
+static int __init us3_freq_cpu_init(struct cpufreq_policy *policy)
+{
+ unsigned int cpu = policy->cpu;
+ unsigned long clock_tick = sparc64_get_clock_tick(cpu) / 1000;
+ struct cpufreq_frequency_table *table =
+ &us3_freq_table[cpu].table[0];
+
+ table[0].index = 0;
+ table[0].frequency = clock_tick / 1;
+ table[1].index = 1;
+ table[1].frequency = clock_tick / 2;
+ table[2].index = 2;
+ table[2].frequency = clock_tick / 32;
+ table[3].index = 0;
+ table[3].frequency = CPUFREQ_TABLE_END;
+
+ policy->cpuinfo.transition_latency = 0;
+ policy->cur = clock_tick;
+
+ return cpufreq_frequency_table_cpuinfo(policy, table);
+}
+
+static int us3_freq_cpu_exit(struct cpufreq_policy *policy)
+{
+ if (cpufreq_us3_driver)
+ us3_set_cpu_divider_index(policy, 0);
+
+ return 0;
+}
+
+static int __init us3_freq_init(void)
+{
+ unsigned long manuf, impl, ver;
+ int ret;
+
+ if (tlb_type != cheetah && tlb_type != cheetah_plus)
+ return -ENODEV;
+
+ __asm__("rdpr %%ver, %0" : "=r" (ver));
+ manuf = ((ver >> 48) & 0xffff);
+ impl = ((ver >> 32) & 0xffff);
+
+ if (manuf == CHEETAH_MANUF &&
+ (impl == CHEETAH_IMPL ||
+ impl == CHEETAH_PLUS_IMPL ||
+ impl == JAGUAR_IMPL ||
+ impl == PANTHER_IMPL)) {
+ struct cpufreq_driver *driver;
+
+ ret = -ENOMEM;
+ driver = kzalloc(sizeof(struct cpufreq_driver), GFP_KERNEL);
+ if (!driver)
+ goto err_out;
+
+ us3_freq_table = kzalloc(
+ (NR_CPUS * sizeof(struct us3_freq_percpu_info)),
+ GFP_KERNEL);
+ if (!us3_freq_table)
+ goto err_out;
+
+ driver->init = us3_freq_cpu_init;
+ driver->verify = us3_freq_verify;
+ driver->target = us3_freq_target;
+ driver->get = us3_freq_get;
+ driver->exit = us3_freq_cpu_exit;
+ driver->owner = THIS_MODULE,
+ strcpy(driver->name, "UltraSPARC-III");
+
+ cpufreq_us3_driver = driver;
+ ret = cpufreq_register_driver(driver);
+ if (ret)
+ goto err_out;
+
+ return 0;
+
+err_out:
+ if (driver) {
+ kfree(driver);
+ cpufreq_us3_driver = NULL;
+ }
+ kfree(us3_freq_table);
+ us3_freq_table = NULL;
+ return ret;
+ }
+
+ return -ENODEV;
+}
+
+static void __exit us3_freq_exit(void)
+{
+ if (cpufreq_us3_driver) {
+ cpufreq_unregister_driver(cpufreq_us3_driver);
+ kfree(cpufreq_us3_driver);
+ cpufreq_us3_driver = NULL;
+ kfree(us3_freq_table);
+ us3_freq_table = NULL;
+ }
+}
+
+MODULE_AUTHOR("David S. Miller <davem@redhat.com>");
+MODULE_DESCRIPTION("cpufreq driver for UltraSPARC-III");
+MODULE_LICENSE("GPL");
+
+module_init(us3_freq_init);
+module_exit(us3_freq_exit);
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff