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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/arch/arm/include/asm/thread_info.h
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/arch/arm/include/asm/thread_info.h')
-rw-r--r--kernel/arch/arm/include/asm/thread_info.h184
1 files changed, 184 insertions, 0 deletions
diff --git a/kernel/arch/arm/include/asm/thread_info.h b/kernel/arch/arm/include/asm/thread_info.h
new file mode 100644
index 000000000..b5a616376
--- /dev/null
+++ b/kernel/arch/arm/include/asm/thread_info.h
@@ -0,0 +1,184 @@
+/*
+ * arch/arm/include/asm/thread_info.h
+ *
+ * Copyright (C) 2002 Russell King.
+ *
+ * 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.
+ */
+#ifndef __ASM_ARM_THREAD_INFO_H
+#define __ASM_ARM_THREAD_INFO_H
+
+#ifdef __KERNEL__
+
+#include <linux/compiler.h>
+#include <asm/fpstate.h>
+#include <asm/page.h>
+
+#define THREAD_SIZE_ORDER 1
+#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
+#define THREAD_START_SP (THREAD_SIZE - 8)
+
+#ifndef __ASSEMBLY__
+
+struct task_struct;
+
+#include <asm/types.h>
+#include <asm/domain.h>
+
+typedef unsigned long mm_segment_t;
+
+struct cpu_context_save {
+ __u32 r4;
+ __u32 r5;
+ __u32 r6;
+ __u32 r7;
+ __u32 r8;
+ __u32 r9;
+ __u32 sl;
+ __u32 fp;
+ __u32 sp;
+ __u32 pc;
+ __u32 extra[2]; /* Xscale 'acc' register, etc */
+};
+
+/*
+ * low level task data that entry.S needs immediate access to.
+ * __switch_to() assumes cpu_context follows immediately after cpu_domain.
+ */
+struct thread_info {
+ unsigned long flags; /* low level flags */
+ int preempt_count; /* 0 => preemptable, <0 => bug */
+ int preempt_lazy_count; /* 0 => preemptable, <0 => bug */
+ mm_segment_t addr_limit; /* address limit */
+ struct task_struct *task; /* main task structure */
+ __u32 cpu; /* cpu */
+ __u32 cpu_domain; /* cpu domain */
+ struct cpu_context_save cpu_context; /* cpu context */
+ __u32 syscall; /* syscall number */
+ __u8 used_cp[16]; /* thread used copro */
+ unsigned long tp_value[2]; /* TLS registers */
+#ifdef CONFIG_CRUNCH
+ struct crunch_state crunchstate;
+#endif
+ union fp_state fpstate __attribute__((aligned(8)));
+ union vfp_state vfpstate;
+#ifdef CONFIG_ARM_THUMBEE
+ unsigned long thumbee_state; /* ThumbEE Handler Base register */
+#endif
+};
+
+#define INIT_THREAD_INFO(tsk) \
+{ \
+ .task = &tsk, \
+ .flags = 0, \
+ .preempt_count = INIT_PREEMPT_COUNT, \
+ .addr_limit = KERNEL_DS, \
+ .cpu_domain = domain_val(DOMAIN_USER, DOMAIN_MANAGER) | \
+ domain_val(DOMAIN_KERNEL, DOMAIN_MANAGER) | \
+ domain_val(DOMAIN_IO, DOMAIN_CLIENT), \
+}
+
+#define init_thread_info (init_thread_union.thread_info)
+#define init_stack (init_thread_union.stack)
+
+/*
+ * how to get the current stack pointer in C
+ */
+register unsigned long current_stack_pointer asm ("sp");
+
+/*
+ * how to get the thread information struct from C
+ */
+static inline struct thread_info *current_thread_info(void) __attribute_const__;
+
+static inline struct thread_info *current_thread_info(void)
+{
+ return (struct thread_info *)
+ (current_stack_pointer & ~(THREAD_SIZE - 1));
+}
+
+#define thread_saved_pc(tsk) \
+ ((unsigned long)(task_thread_info(tsk)->cpu_context.pc))
+#define thread_saved_sp(tsk) \
+ ((unsigned long)(task_thread_info(tsk)->cpu_context.sp))
+
+#ifndef CONFIG_THUMB2_KERNEL
+#define thread_saved_fp(tsk) \
+ ((unsigned long)(task_thread_info(tsk)->cpu_context.fp))
+#else
+#define thread_saved_fp(tsk) \
+ ((unsigned long)(task_thread_info(tsk)->cpu_context.r7))
+#endif
+
+extern void crunch_task_disable(struct thread_info *);
+extern void crunch_task_copy(struct thread_info *, void *);
+extern void crunch_task_restore(struct thread_info *, void *);
+extern void crunch_task_release(struct thread_info *);
+
+extern void iwmmxt_task_disable(struct thread_info *);
+extern void iwmmxt_task_copy(struct thread_info *, void *);
+extern void iwmmxt_task_restore(struct thread_info *, void *);
+extern void iwmmxt_task_release(struct thread_info *);
+extern void iwmmxt_task_switch(struct thread_info *);
+
+extern void vfp_sync_hwstate(struct thread_info *);
+extern void vfp_flush_hwstate(struct thread_info *);
+
+struct user_vfp;
+struct user_vfp_exc;
+
+extern int vfp_preserve_user_clear_hwstate(struct user_vfp __user *,
+ struct user_vfp_exc __user *);
+extern int vfp_restore_user_hwstate(struct user_vfp __user *,
+ struct user_vfp_exc __user *);
+#endif
+
+/*
+ * thread information flags:
+ * TIF_SYSCALL_TRACE - syscall trace active
+ * TIF_SYSCAL_AUDIT - syscall auditing active
+ * TIF_SIGPENDING - signal pending
+ * TIF_NEED_RESCHED - rescheduling necessary
+ * TIF_NOTIFY_RESUME - callback before returning to user
+ * TIF_USEDFPU - FPU was used by this task this quantum (SMP)
+ * TIF_POLLING_NRFLAG - true if poll_idle() is polling TIF_NEED_RESCHED
+ */
+#define TIF_SIGPENDING 0
+#define TIF_NEED_RESCHED 1
+#define TIF_NOTIFY_RESUME 2 /* callback before returning to user */
+#define TIF_NEED_RESCHED_LAZY 3
+#define TIF_UPROBE 7
+#define TIF_SYSCALL_TRACE 8
+#define TIF_SYSCALL_AUDIT 9
+#define TIF_SYSCALL_TRACEPOINT 10
+#define TIF_SECCOMP 11 /* seccomp syscall filtering active */
+#define TIF_NOHZ 12 /* in adaptive nohz mode */
+#define TIF_USING_IWMMXT 17
+#define TIF_MEMDIE 18 /* is terminating due to OOM killer */
+#define TIF_RESTORE_SIGMASK 20
+
+#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
+#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
+#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
+#define _TIF_NEED_RESCHED_LAZY (1 << TIF_NEED_RESCHED_LAZY)
+#define _TIF_UPROBE (1 << TIF_UPROBE)
+#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
+#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
+#define _TIF_SYSCALL_TRACEPOINT (1 << TIF_SYSCALL_TRACEPOINT)
+#define _TIF_SECCOMP (1 << TIF_SECCOMP)
+#define _TIF_USING_IWMMXT (1 << TIF_USING_IWMMXT)
+
+/* Checks for any syscall work in entry-common.S */
+#define _TIF_SYSCALL_WORK (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
+ _TIF_SYSCALL_TRACEPOINT | _TIF_SECCOMP)
+
+/*
+ * Change these and you break ASM code in entry-common.S
+ */
+#define _TIF_WORK_MASK (_TIF_NEED_RESCHED | _TIF_SIGPENDING | \
+ _TIF_NOTIFY_RESUME | _TIF_UPROBE)
+
+#endif /* __KERNEL__ */
+#endif /* __ASM_ARM_THREAD_INFO_H */