Merge branch 'v3.19-next/cleanup-samsung' into v3.19-next/mach-exynos
This commit is contained in:
Kukjin Kim
commit
68847edc83
|
|
@ -17,9 +17,6 @@ obj-$(CONFIG_PM_GENERIC_DOMAINS) += pm_domains.o
|
|||
|
||||
obj-$(CONFIG_SMP) += platsmp.o headsmp.o
|
||||
|
||||
obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o
|
||||
CFLAGS_hotplug.o += -march=armv7-a
|
||||
|
||||
plus_sec := $(call as-instr,.arch_extension sec,+sec)
|
||||
AFLAGS_exynos-smc.o :=-Wa,-march=armv7-a$(plus_sec)
|
||||
AFLAGS_sleep.o :=-Wa,-march=armv7-a$(plus_sec)
|
||||
|
|
|
|||
|
|
@ -139,8 +139,6 @@ extern void exynos_cpu_resume_ns(void);
|
|||
|
||||
extern struct smp_operations exynos_smp_ops;
|
||||
|
||||
extern void exynos_cpu_die(unsigned int cpu);
|
||||
|
||||
/* PMU(Power Management Unit) support */
|
||||
|
||||
#define PMU_TABLE_END (-1U)
|
||||
|
|
|
|||
|
|
@ -1,91 +0,0 @@
|
|||
/*
|
||||
* Cloned from linux/arch/arm/mach-realview/hotplug.c
|
||||
*
|
||||
* Copyright (C) 2002 ARM Ltd.
|
||||
* All Rights Reserved
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/smp.h>
|
||||
#include <linux/io.h>
|
||||
|
||||
#include <asm/cacheflush.h>
|
||||
#include <asm/cp15.h>
|
||||
#include <asm/smp_plat.h>
|
||||
|
||||
#include "common.h"
|
||||
#include "regs-pmu.h"
|
||||
|
||||
static inline void cpu_leave_lowpower(void)
|
||||
{
|
||||
unsigned int v;
|
||||
|
||||
asm volatile(
|
||||
"mrc p15, 0, %0, c1, c0, 0\n"
|
||||
" orr %0, %0, %1\n"
|
||||
" mcr p15, 0, %0, c1, c0, 0\n"
|
||||
" mrc p15, 0, %0, c1, c0, 1\n"
|
||||
" orr %0, %0, %2\n"
|
||||
" mcr p15, 0, %0, c1, c0, 1\n"
|
||||
: "=&r" (v)
|
||||
: "Ir" (CR_C), "Ir" (0x40)
|
||||
: "cc");
|
||||
}
|
||||
|
||||
static inline void platform_do_lowpower(unsigned int cpu, int *spurious)
|
||||
{
|
||||
u32 mpidr = cpu_logical_map(cpu);
|
||||
u32 core_id = MPIDR_AFFINITY_LEVEL(mpidr, 0);
|
||||
|
||||
for (;;) {
|
||||
|
||||
/* Turn the CPU off on next WFI instruction. */
|
||||
exynos_cpu_power_down(core_id);
|
||||
|
||||
wfi();
|
||||
|
||||
if (pen_release == core_id) {
|
||||
/*
|
||||
* OK, proper wakeup, we're done
|
||||
*/
|
||||
break;
|
||||
}
|
||||
|
||||
/*
|
||||
* Getting here, means that we have come out of WFI without
|
||||
* having been woken up - this shouldn't happen
|
||||
*
|
||||
* Just note it happening - when we're woken, we can report
|
||||
* its occurrence.
|
||||
*/
|
||||
(*spurious)++;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* platform-specific code to shutdown a CPU
|
||||
*
|
||||
* Called with IRQs disabled
|
||||
*/
|
||||
void __ref exynos_cpu_die(unsigned int cpu)
|
||||
{
|
||||
int spurious = 0;
|
||||
|
||||
v7_exit_coherency_flush(louis);
|
||||
|
||||
platform_do_lowpower(cpu, &spurious);
|
||||
|
||||
/*
|
||||
* bring this CPU back into the world of cache
|
||||
* coherency, and then restore interrupts
|
||||
*/
|
||||
cpu_leave_lowpower();
|
||||
|
||||
if (spurious)
|
||||
pr_warn("CPU%u: %u spurious wakeup calls\n", cpu, spurious);
|
||||
}
|
||||
|
|
@ -22,6 +22,7 @@
|
|||
#include <linux/of_address.h>
|
||||
|
||||
#include <asm/cacheflush.h>
|
||||
#include <asm/cp15.h>
|
||||
#include <asm/smp_plat.h>
|
||||
#include <asm/smp_scu.h>
|
||||
#include <asm/firmware.h>
|
||||
|
|
@ -33,6 +34,88 @@
|
|||
|
||||
extern void exynos4_secondary_startup(void);
|
||||
|
||||
/*
|
||||
* Set or clear the USE_DELAYED_RESET_ASSERTION option, set on Exynos4 SoCs
|
||||
* during hot-(un)plugging CPUx.
|
||||
*
|
||||
* The feature can be cleared safely during first boot of secondary CPU.
|
||||
*
|
||||
* Exynos4 SoCs require setting USE_DELAYED_RESET_ASSERTION during powering
|
||||
* down a CPU so the CPU idle clock down feature could properly detect global
|
||||
* idle state when CPUx is off.
|
||||
*/
|
||||
static void exynos_set_delayed_reset_assertion(u32 core_id, bool enable)
|
||||
{
|
||||
if (soc_is_exynos4()) {
|
||||
unsigned int tmp;
|
||||
|
||||
tmp = pmu_raw_readl(EXYNOS_ARM_CORE_OPTION(core_id));
|
||||
if (enable)
|
||||
tmp |= S5P_USE_DELAYED_RESET_ASSERTION;
|
||||
else
|
||||
tmp &= ~(S5P_USE_DELAYED_RESET_ASSERTION);
|
||||
pmu_raw_writel(tmp, EXYNOS_ARM_CORE_OPTION(core_id));
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef CONFIG_HOTPLUG_CPU
|
||||
static inline void cpu_leave_lowpower(u32 core_id)
|
||||
{
|
||||
unsigned int v;
|
||||
|
||||
asm volatile(
|
||||
"mrc p15, 0, %0, c1, c0, 0\n"
|
||||
" orr %0, %0, %1\n"
|
||||
" mcr p15, 0, %0, c1, c0, 0\n"
|
||||
" mrc p15, 0, %0, c1, c0, 1\n"
|
||||
" orr %0, %0, %2\n"
|
||||
" mcr p15, 0, %0, c1, c0, 1\n"
|
||||
: "=&r" (v)
|
||||
: "Ir" (CR_C), "Ir" (0x40)
|
||||
: "cc");
|
||||
|
||||
exynos_set_delayed_reset_assertion(core_id, false);
|
||||
}
|
||||
|
||||
static inline void platform_do_lowpower(unsigned int cpu, int *spurious)
|
||||
{
|
||||
u32 mpidr = cpu_logical_map(cpu);
|
||||
u32 core_id = MPIDR_AFFINITY_LEVEL(mpidr, 0);
|
||||
|
||||
for (;;) {
|
||||
|
||||
/* Turn the CPU off on next WFI instruction. */
|
||||
exynos_cpu_power_down(core_id);
|
||||
|
||||
/*
|
||||
* Exynos4 SoCs require setting
|
||||
* USE_DELAYED_RESET_ASSERTION so the CPU idle
|
||||
* clock down feature could properly detect
|
||||
* global idle state when CPUx is off.
|
||||
*/
|
||||
exynos_set_delayed_reset_assertion(core_id, true);
|
||||
|
||||
wfi();
|
||||
|
||||
if (pen_release == core_id) {
|
||||
/*
|
||||
* OK, proper wakeup, we're done
|
||||
*/
|
||||
break;
|
||||
}
|
||||
|
||||
/*
|
||||
* Getting here, means that we have come out of WFI without
|
||||
* having been woken up - this shouldn't happen
|
||||
*
|
||||
* Just note it happening - when we're woken, we can report
|
||||
* its occurrence.
|
||||
*/
|
||||
(*spurious)++;
|
||||
}
|
||||
}
|
||||
#endif /* CONFIG_HOTPLUG_CPU */
|
||||
|
||||
/**
|
||||
* exynos_core_power_down : power down the specified cpu
|
||||
* @cpu : the cpu to power down
|
||||
|
|
@ -260,6 +343,9 @@ static int exynos_boot_secondary(unsigned int cpu, struct task_struct *idle)
|
|||
udelay(10);
|
||||
}
|
||||
|
||||
/* No harm if this is called during first boot of secondary CPU */
|
||||
exynos_set_delayed_reset_assertion(core_id, false);
|
||||
|
||||
/*
|
||||
* now the secondary core is starting up let it run its
|
||||
* calibrations, then wait for it to finish
|
||||
|
|
@ -341,6 +427,33 @@ static void __init exynos_smp_prepare_cpus(unsigned int max_cpus)
|
|||
}
|
||||
}
|
||||
|
||||
#ifdef CONFIG_HOTPLUG_CPU
|
||||
/*
|
||||
* platform-specific code to shutdown a CPU
|
||||
*
|
||||
* Called with IRQs disabled
|
||||
*/
|
||||
static void exynos_cpu_die(unsigned int cpu)
|
||||
{
|
||||
int spurious = 0;
|
||||
u32 mpidr = cpu_logical_map(cpu);
|
||||
u32 core_id = MPIDR_AFFINITY_LEVEL(mpidr, 0);
|
||||
|
||||
v7_exit_coherency_flush(louis);
|
||||
|
||||
platform_do_lowpower(cpu, &spurious);
|
||||
|
||||
/*
|
||||
* bring this CPU back into the world of cache
|
||||
* coherency, and then restore interrupts
|
||||
*/
|
||||
cpu_leave_lowpower(core_id);
|
||||
|
||||
if (spurious)
|
||||
pr_warn("CPU%u: %u spurious wakeup calls\n", cpu, spurious);
|
||||
}
|
||||
#endif /* CONFIG_HOTPLUG_CPU */
|
||||
|
||||
struct smp_operations exynos_smp_ops __initdata = {
|
||||
.smp_init_cpus = exynos_smp_init_cpus,
|
||||
.smp_prepare_cpus = exynos_smp_prepare_cpus,
|
||||
|
|
|
|||
|
|
@ -20,6 +20,7 @@
|
|||
|
||||
#define S5P_USE_STANDBY_WFI0 (1 << 16)
|
||||
#define S5P_USE_STANDBY_WFE0 (1 << 24)
|
||||
#define S5P_USE_DELAYED_RESET_ASSERTION BIT(12)
|
||||
|
||||
#define EXYNOS_CORE_PO_RESET(n) ((1 << 4) << n)
|
||||
#define EXYNOS_WAKEUP_FROM_LOWPWR (1 << 28)
|
||||
|
|
@ -108,6 +109,8 @@
|
|||
(EXYNOS_ARM_CORE0_CONFIGURATION + (0x80 * (_nr)))
|
||||
#define EXYNOS_ARM_CORE_STATUS(_nr) \
|
||||
(EXYNOS_ARM_CORE_CONFIGURATION(_nr) + 0x4)
|
||||
#define EXYNOS_ARM_CORE_OPTION(_nr) \
|
||||
(EXYNOS_ARM_CORE_CONFIGURATION(_nr) + 0x8)
|
||||
|
||||
#define EXYNOS_ARM_COMMON_CONFIGURATION 0x2500
|
||||
#define EXYNOS_COMMON_CONFIGURATION(_nr) \
|
||||
|
|
|
|||
Loading…
Reference in New Issue