import PULS_20160108

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / arm64 / include / asm / cpu_ops.h

diff --git a/arch/arm64/include/asm/cpu_ops.h b/arch/arm64/include/asm/cpu_ops.h
new file mode 100644 (file)
index 0000000..d7b4b38
--- /dev/null
+++ b/arch/arm64/include/asm/cpu_ops.h
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2013 ARM Ltd.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef __ASM_CPU_OPS_H
+#define __ASM_CPU_OPS_H
+
+#include <linux/init.h>
+#include <linux/threads.h>
+
+struct device_node;
+
+/**
+ * struct cpu_operations - Callback operations for hotplugging CPUs.
+ *
+ * @name:      Name of the property as appears in a devicetree cpu node's
+ *             enable-method property.
+ * @cpu_init:  Reads any data necessary for a specific enable-method from the
+ *             devicetree, for a given cpu node and proposed logical id.
+ * @cpu_prepare: Early one-time preparation step for a cpu. If there is a
+ *             mechanism for doing so, tests whether it is possible to boot
+ *             the given CPU.
+ * @cpu_boot:  Boots a cpu into the kernel.
+ * @cpu_postboot: Optionally, perform any post-boot cleanup or necesary
+ *             synchronisation. Called from the cpu being booted.
+ * @cpu_disable: Prepares a cpu to die. May fail for some mechanism-specific
+ *             reason, which will cause the hot unplug to be aborted. Called
+ *             from the cpu to be killed.
+ * @cpu_die:   Makes a cpu leave the kernel. Must not fail. Called from the
+ *             cpu being killed.
+ * @cpu_kill:  Ensures a cpu has left the kernel. Called from another cpu.
+ * @cpu_suspend: Suspends a cpu and saves the required context. May fail owing
+ *               to wrong parameters or error conditions. Called from the
+ *               CPU being suspended. Must be called with IRQs disabled.
+ */
+struct cpu_operations {
+       const char      *name;
+       int             (*cpu_init)(struct device_node *, unsigned int);
+       int             (*cpu_prepare)(unsigned int);
+       int             (*cpu_boot)(unsigned int);
+       void            (*cpu_postboot)(void);
+#ifdef CONFIG_HOTPLUG_CPU
+       int             (*cpu_disable)(unsigned int cpu);
+       void            (*cpu_die)(unsigned int cpu);
+       int             (*cpu_kill)(unsigned int cpu);
+#endif
+#ifdef CONFIG_ARM64_CPU_SUSPEND
+       int             (*cpu_suspend)(unsigned long);
+#endif
+};
+
+extern const struct cpu_operations *cpu_ops[NR_CPUS];
+extern int __init cpu_read_ops(struct device_node *dn, int cpu);
+extern void __init cpu_read_bootcpu_ops(void);
+
+#endif /* ifndef __ASM_CPU_OPS_H */