m32r: move include/asm-m32r headers to arch/m32r/include/asm

Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>

1 files changed, 184 insertions, 0 deletions

diff --git a/arch/m32r/include/asm/thread_info.h b/arch/m32r/include/asm/thread_info.h
new file mode 100644
index 000000000000..8589d462df27
--- /dev/null
+++ b/arch/m32r/include/asm/thread_info.h
@@ -0,0 +1,184 @@
+#ifndef _ASM_M32R_THREAD_INFO_H
+#define _ASM_M32R_THREAD_INFO_H
+
+/* thread_info.h: m32r low-level thread information
+ *
+ * Copyright (C) 2002  David Howells (dhowells@redhat.com)
+ * - Incorporating suggestions made by Linus Torvalds and Dave Miller
+ * Copyright (C) 2004  Hirokazu Takata <takata at linux-m32r.org>
+ */
+
+#ifdef __KERNEL__
+
+#ifndef __ASSEMBLY__
+#include <asm/processor.h>
+#endif
+
+/*
+ * low level task data that entry.S needs immediate access to
+ * - this struct should fit entirely inside of one cache line
+ * - this struct shares the supervisor stack pages
+ * - if the contents of this structure are changed, the assembly constants must also be changed
+ */
+#ifndef __ASSEMBLY__
+
+struct thread_info {
+	struct task_struct	*task;		/* main task structure */
+	struct exec_domain	*exec_domain;	/* execution domain */
+	unsigned long		flags;		/* low level flags */
+	unsigned long		status;		/* thread-synchronous flags */
+	__u32			cpu;		/* current CPU */
+	int			preempt_count;	/* 0 => preemptable, <0 => BUG */
+
+	mm_segment_t		addr_limit;	/* thread address space:
+					 	   0-0xBFFFFFFF for user-thread
+						   0-0xFFFFFFFF for kernel-thread
+						*/
+	struct restart_block    restart_block;
+
+	__u8			supervisor_stack[0];
+};
+
+#else /* !__ASSEMBLY__ */
+
+/* offsets into the thread_info struct for assembly code access */
+#define TI_TASK		0x00000000
+#define TI_EXEC_DOMAIN	0x00000004
+#define TI_FLAGS	0x00000008
+#define TI_STATUS	0x0000000C
+#define TI_CPU		0x00000010
+#define TI_PRE_COUNT	0x00000014
+#define TI_ADDR_LIMIT	0x00000018
+#define TI_RESTART_BLOCK 0x000001C
+
+#endif
+
+#define PREEMPT_ACTIVE		0x10000000
+
+/*
+ * macros/functions for gaining access to the thread information structure
+ *
+ * preempt_count needs to be 1 initially, until the scheduler is functional.
+ */
+#ifndef __ASSEMBLY__
+
+#define INIT_THREAD_INFO(tsk)			\
+{						\
+	.task		= &tsk,			\
+	.exec_domain	= &default_exec_domain,	\
+	.flags		= 0,			\
+	.cpu		= 0,			\
+	.preempt_count	= 1,			\
+	.addr_limit	= KERNEL_DS,		\
+	.restart_block = {			\
+		.fn = do_no_restart_syscall,	\
+	},					\
+}
+
+#define init_thread_info	(init_thread_union.thread_info)
+#define init_stack		(init_thread_union.stack)
+
+#define THREAD_SIZE (2*PAGE_SIZE)
+
+/* how to get the thread information struct from C */
+static inline struct thread_info *current_thread_info(void)
+{
+	struct thread_info *ti;
+
+	__asm__ __volatile__ (
+		"ldi	%0, #%1			\n\t"
+		"and	%0, sp			\n\t"
+		: "=r" (ti) : "i" (~(THREAD_SIZE - 1))
+	);
+
+	return ti;
+}
+
+#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
+
+/* thread information allocation */
+#ifdef CONFIG_DEBUG_STACK_USAGE
+#define alloc_thread_info(tsk)					\
+	({							\
+		struct thread_info *ret;			\
+	 							\
+	 	ret = kzalloc(THREAD_SIZE, GFP_KERNEL);		\
+								\
+	 	ret;						\
+	 })
+#else
+#define alloc_thread_info(tsk) kmalloc(THREAD_SIZE, GFP_KERNEL)
+#endif
+
+#define free_thread_info(info) kfree(info)
+
+#define TI_FLAG_FAULT_CODE_SHIFT	28
+
+static inline void set_thread_fault_code(unsigned int val)
+{
+	struct thread_info *ti = current_thread_info();
+	ti->flags = (ti->flags & (~0 >> (32 - TI_FLAG_FAULT_CODE_SHIFT)))
+		| (val << TI_FLAG_FAULT_CODE_SHIFT);
+}
+
+static inline unsigned int get_thread_fault_code(void)
+{
+	struct thread_info *ti = current_thread_info();
+	return ti->flags >> TI_FLAG_FAULT_CODE_SHIFT;
+}
+
+#else /* !__ASSEMBLY__ */
+
+#define THREAD_SIZE	8192
+
+/* how to get the thread information struct from ASM */
+#define GET_THREAD_INFO(reg)	GET_THREAD_INFO reg
+	.macro GET_THREAD_INFO reg
+	ldi	\reg, #-THREAD_SIZE
+	and	\reg, sp
+	.endm
+
+#endif
+
+/*
+ * thread information flags
+ * - these are process state flags that various assembly files may need to access
+ * - pending work-to-be-done flags are in LSW
+ * - other flags in MSW
+ */
+#define TIF_SYSCALL_TRACE	0	/* syscall trace active */
+#define TIF_SIGPENDING		1	/* signal pending */
+#define TIF_NEED_RESCHED	2	/* rescheduling necessary */
+#define TIF_SINGLESTEP		3	/* restore singlestep on return to user mode */
+#define TIF_IRET		4	/* return with iret */
+#define TIF_RESTORE_SIGMASK	8	/* restore signal mask in do_signal() */
+#define TIF_USEDFPU		16	/* FPU was used by this task this quantum (SMP) */
+#define TIF_POLLING_NRFLAG	17	/* true if poll_idle() is polling TIF_NEED_RESCHED */
+#define TIF_MEMDIE		18	/* OOM killer killed process */
+#define TIF_FREEZE		19	/* 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_SINGLESTEP		(1<<TIF_SINGLESTEP)
+#define _TIF_IRET		(1<<TIF_IRET)
+#define _TIF_RESTORE_SIGMASK	(1<<TIF_RESTORE_SIGMASK)
+#define _TIF_USEDFPU		(1<<TIF_USEDFPU)
+#define _TIF_POLLING_NRFLAG	(1<<TIF_POLLING_NRFLAG)
+#define _TIF_FREEZE		(1<<TIF_FREEZE)
+
+#define _TIF_WORK_MASK		0x0000FFFE	/* work to do on interrupt/exception return */
+#define _TIF_ALLWORK_MASK	0x0000FFFF	/* work to do on any return to u-space */
+
+/*
+ * Thread-synchronous status.
+ *
+ * This is different from the flags in that nobody else
+ * ever touches our thread-synchronous status, so we don't
+ * have to worry about atomic accesses.
+ */
+#define TS_USEDFPU		0x0001	/* FPU was used by this task this quantum (SMP) */
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_M32R_THREAD_INFO_H */