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-rw-r--r--arch/arm/mach-shmobile/platsmp-apmu.c245
1 files changed, 101 insertions, 144 deletions
diff --git a/arch/arm/mach-shmobile/platsmp-apmu.c b/arch/arm/mach-shmobile/platsmp-apmu.c
index ba732effc90b..96330ef25641 100644
--- a/arch/arm/mach-shmobile/platsmp-apmu.c
+++ b/arch/arm/mach-shmobile/platsmp-apmu.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
/*
* SMP support for SoCs with APMU
*
* Copyright (C) 2014 Renesas Electronics Corporation
* Copyright (C) 2013 Magnus Damm
- *
- * 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/cpu_pm.h>
#include <linux/delay.h>
@@ -23,7 +20,6 @@
#include <asm/smp_plat.h>
#include <asm/suspend.h>
#include "common.h"
-#include "platsmp-apmu.h"
#include "rcar-gen2.h"
static struct {
@@ -87,6 +83,104 @@ static int __maybe_unused apmu_wrap(int cpu, int (*fn)(void __iomem *p, int cpu)
return p ? fn(p, apmu_cpus[cpu].bit) : -EINVAL;
}
+#if defined(CONFIG_HOTPLUG_CPU) || defined(CONFIG_SUSPEND)
+/* nicked from arch/arm/mach-exynos/hotplug.c */
+static inline void cpu_enter_lowpower_a15(void)
+{
+ unsigned int v;
+
+ asm volatile(
+ " mrc p15, 0, %0, c1, c0, 0\n"
+ " bic %0, %0, %1\n"
+ " mcr p15, 0, %0, c1, c0, 0\n"
+ : "=&r" (v)
+ : "Ir" (CR_C)
+ : "cc");
+
+ flush_cache_louis();
+
+ asm volatile(
+ /*
+ * Turn off coherency
+ */
+ " mrc p15, 0, %0, c1, c0, 1\n"
+ " bic %0, %0, %1\n"
+ " mcr p15, 0, %0, c1, c0, 1\n"
+ : "=&r" (v)
+ : "Ir" (0x40)
+ : "cc");
+
+ isb();
+ dsb();
+}
+
+static void shmobile_smp_apmu_cpu_shutdown(unsigned int cpu)
+{
+
+ /* Select next sleep mode using the APMU */
+ apmu_wrap(cpu, apmu_power_off);
+
+ /* Do ARM specific CPU shutdown */
+ cpu_enter_lowpower_a15();
+}
+#endif
+
+#if defined(CONFIG_HOTPLUG_CPU)
+static void shmobile_smp_apmu_cpu_die(unsigned int cpu)
+{
+ /* For this particular CPU deregister boot vector */
+ shmobile_smp_hook(cpu, 0, 0);
+
+ /* Shutdown CPU core */
+ shmobile_smp_apmu_cpu_shutdown(cpu);
+
+ /* jump to shared mach-shmobile sleep / reset code */
+ shmobile_smp_sleep();
+}
+
+static int shmobile_smp_apmu_cpu_kill(unsigned int cpu)
+{
+ return apmu_wrap(cpu, apmu_power_off_poll);
+}
+#endif
+
+#if defined(CONFIG_SUSPEND)
+static int shmobile_smp_apmu_do_suspend(unsigned long cpu)
+{
+ shmobile_smp_hook(cpu, __pa_symbol(cpu_resume), 0);
+ shmobile_smp_apmu_cpu_shutdown(cpu);
+ cpu_do_idle(); /* WFI selects Core Standby */
+ return 1;
+}
+
+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 int shmobile_smp_apmu_enter_suspend(suspend_state_t state)
+{
+ cpu_suspend(smp_processor_id(), shmobile_smp_apmu_do_suspend);
+ cpu_leave_lowpower();
+ return 0;
+}
+
+void __init shmobile_smp_apmu_suspend_init(void)
+{
+ shmobile_suspend_ops.enter = shmobile_smp_apmu_enter_suspend;
+}
+#endif
+
#ifdef CONFIG_SMP
static void apmu_init_cpu(struct resource *res, int cpu, int bit)
{
@@ -106,38 +200,6 @@ static void apmu_init_cpu(struct resource *res, int cpu, int bit)
writel(x, apmu_cpus[cpu].iomem + DBGRCR_OFFS);
}
-static void apmu_parse_cfg(void (*fn)(struct resource *res, int cpu, int bit),
- struct rcar_apmu_config *apmu_config, int num)
-{
- int id;
- int k;
- int bit, index;
- bool is_allowed;
-
- for (k = 0; k < num; k++) {
- /* only enable the cluster that includes the boot CPU */
- is_allowed = false;
- for (bit = 0; bit < ARRAY_SIZE(apmu_config[k].cpus); bit++) {
- id = apmu_config[k].cpus[bit];
- if (id >= 0) {
- if (id == cpu_logical_map(0))
- is_allowed = true;
- }
- }
- if (!is_allowed)
- continue;
-
- for (bit = 0; bit < ARRAY_SIZE(apmu_config[k].cpus); bit++) {
- id = apmu_config[k].cpus[bit];
- if (id >= 0) {
- index = get_logical_index(id);
- if (index >= 0)
- fn(&apmu_config[k].iomem, index, bit);
- }
- }
- }
-}
-
static const struct of_device_id apmu_ids[] = {
{ .compatible = "renesas,apmu" },
{ /*sentinel*/ }
@@ -194,15 +256,8 @@ static void __init shmobile_smp_apmu_setup_boot(void)
shmobile_boot_fn_gen2 = shmobile_boot_fn;
}
-void __init shmobile_smp_apmu_prepare_cpus(unsigned int max_cpus,
- struct rcar_apmu_config *apmu_config,
- int num)
-{
- shmobile_smp_apmu_setup_boot();
- apmu_parse_cfg(apmu_init_cpu, apmu_config, num);
-}
-
-int shmobile_smp_apmu_boot_secondary(unsigned int cpu, struct task_struct *idle)
+static int shmobile_smp_apmu_boot_secondary(unsigned int cpu,
+ struct task_struct *idle)
{
/* For this particular CPU register boot vector */
shmobile_smp_hook(cpu, __pa_symbol(shmobile_boot_apmu), 0);
@@ -229,101 +284,3 @@ static struct smp_operations apmu_smp_ops __initdata = {
CPU_METHOD_OF_DECLARE(shmobile_smp_apmu, "renesas,apmu", &apmu_smp_ops);
#endif /* CONFIG_SMP */
-
-#if defined(CONFIG_HOTPLUG_CPU) || defined(CONFIG_SUSPEND)
-/* nicked from arch/arm/mach-exynos/hotplug.c */
-static inline void cpu_enter_lowpower_a15(void)
-{
- unsigned int v;
-
- asm volatile(
- " mrc p15, 0, %0, c1, c0, 0\n"
- " bic %0, %0, %1\n"
- " mcr p15, 0, %0, c1, c0, 0\n"
- : "=&r" (v)
- : "Ir" (CR_C)
- : "cc");
-
- flush_cache_louis();
-
- asm volatile(
- /*
- * Turn off coherency
- */
- " mrc p15, 0, %0, c1, c0, 1\n"
- " bic %0, %0, %1\n"
- " mcr p15, 0, %0, c1, c0, 1\n"
- : "=&r" (v)
- : "Ir" (0x40)
- : "cc");
-
- isb();
- dsb();
-}
-
-static void shmobile_smp_apmu_cpu_shutdown(unsigned int cpu)
-{
-
- /* Select next sleep mode using the APMU */
- apmu_wrap(cpu, apmu_power_off);
-
- /* Do ARM specific CPU shutdown */
- cpu_enter_lowpower_a15();
-}
-
-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");
-}
-#endif
-
-#if defined(CONFIG_HOTPLUG_CPU)
-void shmobile_smp_apmu_cpu_die(unsigned int cpu)
-{
- /* For this particular CPU deregister boot vector */
- shmobile_smp_hook(cpu, 0, 0);
-
- /* Shutdown CPU core */
- shmobile_smp_apmu_cpu_shutdown(cpu);
-
- /* jump to shared mach-shmobile sleep / reset code */
- shmobile_smp_sleep();
-}
-
-int shmobile_smp_apmu_cpu_kill(unsigned int cpu)
-{
- return apmu_wrap(cpu, apmu_power_off_poll);
-}
-#endif
-
-#if defined(CONFIG_SUSPEND)
-static int shmobile_smp_apmu_do_suspend(unsigned long cpu)
-{
- shmobile_smp_hook(cpu, __pa_symbol(cpu_resume), 0);
- shmobile_smp_apmu_cpu_shutdown(cpu);
- cpu_do_idle(); /* WFI selects Core Standby */
- return 1;
-}
-
-static int shmobile_smp_apmu_enter_suspend(suspend_state_t state)
-{
- cpu_suspend(smp_processor_id(), shmobile_smp_apmu_do_suspend);
- cpu_leave_lowpower();
- return 0;
-}
-
-void __init shmobile_smp_apmu_suspend_init(void)
-{
- shmobile_suspend_ops.enter = shmobile_smp_apmu_enter_suspend;
-}
-#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-05 08:32:14 +0000