From 849369d6c66d3054688672f97d31fceb8e8230fb Mon Sep 17 00:00:00 2001
From: root <root@artemis.panaceas.org>
Date: Fri, 25 Dec 2015 04:40:36 +0000
Subject: initial_commit

---
 arch/alpha/include/asm/thread_info.h | 123 +++++++++++++++++++++++++++++++++++
 1 file changed, 123 insertions(+)
 create mode 100644 arch/alpha/include/asm/thread_info.h

(limited to 'arch/alpha/include/asm/thread_info.h')

diff --git a/arch/alpha/include/asm/thread_info.h b/arch/alpha/include/asm/thread_info.h
new file mode 100644
index 00000000..6f32f9c8
--- /dev/null
+++ b/arch/alpha/include/asm/thread_info.h
@@ -0,0 +1,123 @@
+#ifndef _ALPHA_THREAD_INFO_H
+#define _ALPHA_THREAD_INFO_H
+
+#ifdef __KERNEL__
+
+#ifndef __ASSEMBLY__
+#include <asm/processor.h>
+#include <asm/types.h>
+#include <asm/hwrpb.h>
+#endif
+
+#ifndef __ASSEMBLY__
+struct thread_info {
+	struct pcb_struct	pcb;		/* palcode state */
+
+	struct task_struct	*task;		/* main task structure */
+	unsigned int		flags;		/* low level flags */
+	unsigned int		ieee_state;	/* see fpu.h */
+
+	struct exec_domain	*exec_domain;	/* execution domain */
+	mm_segment_t		addr_limit;	/* thread address space */
+	unsigned		cpu;		/* current CPU */
+	int			preempt_count; /* 0 => preemptable, <0 => BUG */
+
+	int bpt_nsaved;
+	unsigned long bpt_addr[2];		/* breakpoint handling  */
+	unsigned int bpt_insn[2];
+
+	struct restart_block	restart_block;
+};
+
+/*
+ * Macros/functions for gaining access to the thread information structure.
+ */
+#define INIT_THREAD_INFO(tsk)			\
+{						\
+	.task		= &tsk,			\
+	.exec_domain	= &default_exec_domain,	\
+	.addr_limit	= KERNEL_DS,		\
+	.preempt_count	= INIT_PREEMPT_COUNT,	\
+	.restart_block = {			\
+		.fn = do_no_restart_syscall,	\
+	},					\
+}
+
+#define init_thread_info	(init_thread_union.thread_info)
+#define init_stack		(init_thread_union.stack)
+
+/* How to get the thread information struct from C.  */
+register struct thread_info *__current_thread_info __asm__("$8");
+#define current_thread_info()  __current_thread_info
+
+#endif /* __ASSEMBLY__ */
+
+/* Thread information allocation.  */
+#define THREAD_SIZE_ORDER 1
+#define THREAD_SIZE (2*PAGE_SIZE)
+
+#define PREEMPT_ACTIVE		0x40000000
+
+/*
+ * Thread information flags:
+ * - these are process state flags and used from assembly
+ * - pending work-to-be-done flags come first and must be assigned to be
+ *   within bits 0 to 7 to fit in and immediate operand.
+ * - ALPHA_UAC_SHIFT below must be kept consistent with the unaligned
+ *   control flags.
+ *
+ * TIF_SYSCALL_TRACE is known to be 0 via blbs.
+ */
+#define TIF_SYSCALL_TRACE	0	/* syscall trace active */
+#define TIF_NOTIFY_RESUME	1	/* callback before returning to user */
+#define TIF_SIGPENDING		2	/* signal pending */
+#define TIF_NEED_RESCHED	3	/* rescheduling necessary */
+#define TIF_POLLING_NRFLAG	8	/* poll_idle is polling NEED_RESCHED */
+#define TIF_DIE_IF_KERNEL	9	/* dik recursion lock */
+#define TIF_UAC_NOPRINT		10	/* see sysinfo.h */
+#define TIF_UAC_NOFIX		11
+#define TIF_UAC_SIGBUS		12
+#define TIF_MEMDIE		13	/* is terminating due to OOM killer */
+#define TIF_RESTORE_SIGMASK	14	/* restore signal mask in do_signal */
+#define TIF_FREEZE		16	/* is freezing for suspend */
+
+#define _TIF_SYSCALL_TRACE	(1<<TIF_SYSCALL_TRACE)
+#define _TIF_SIGPENDING		(1<<TIF_SIGPENDING)
+#define _TIF_NEED_RESCHED	(1<<TIF_NEED_RESCHED)
+#define _TIF_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)
+#define _TIF_RESTORE_SIGMASK	(1<<TIF_RESTORE_SIGMASK)
+#define _TIF_NOTIFY_RESUME	(1<<TIF_NOTIFY_RESUME)
+#define _TIF_FREEZE		(1<<TIF_FREEZE)
+
+/* Work to do on interrupt/exception return.  */
+#define _TIF_WORK_MASK		(_TIF_SIGPENDING | _TIF_NEED_RESCHED | \
+				 _TIF_NOTIFY_RESUME)
+
+/* Work to do on any return to userspace.  */
+#define _TIF_ALLWORK_MASK	(_TIF_WORK_MASK		\
+				 | _TIF_SYSCALL_TRACE)
+
+#define ALPHA_UAC_SHIFT		10
+#define ALPHA_UAC_MASK		(1 << TIF_UAC_NOPRINT | 1 << TIF_UAC_NOFIX | \
+				 1 << TIF_UAC_SIGBUS)
+
+#define SET_UNALIGN_CTL(task,value)	({				     \
+	task_thread_info(task)->flags = ((task_thread_info(task)->flags &    \
+		~ALPHA_UAC_MASK)					     \
+		| (((value) << ALPHA_UAC_SHIFT)       & (1<<TIF_UAC_NOPRINT))\
+		| (((value) << (ALPHA_UAC_SHIFT + 1)) & (1<<TIF_UAC_SIGBUS)) \
+		| (((value) << (ALPHA_UAC_SHIFT - 1)) & (1<<TIF_UAC_NOFIX)));\
+	0; })
+
+#define GET_UNALIGN_CTL(task,value)	({				\
+	put_user((task_thread_info(task)->flags & (1 << TIF_UAC_NOPRINT))\
+		  >> ALPHA_UAC_SHIFT					\
+		 | (task_thread_info(task)->flags & (1 << TIF_UAC_SIGBUS))\
+		 >> (ALPHA_UAC_SHIFT + 1)				\
+		 | (task_thread_info(task)->flags & (1 << TIF_UAC_NOFIX))\
+		 >> (ALPHA_UAC_SHIFT - 1),				\
+		 (int __user *)(value));				\
+	})
+
+#endif /* __KERNEL__ */
+#endif /* _ALPHA_THREAD_INFO_H */
-- 
cgit v1.2.3