--- /dev/null
+/* thread_info.h: PowerPC low-level thread information
+ * adapted from the i386 version by Paul Mackerras
+ *
+ * Copyright (C) 2002 David Howells (dhowells@redhat.com)
+ * - Incorporating suggestions made by Linus Torvalds and Dave Miller
+ */
+
+#ifndef _ASM_POWERPC_THREAD_INFO_H
+#define _ASM_POWERPC_THREAD_INFO_H
+
+#ifdef __KERNEL__
+
+/* We have 8k stacks on ppc32 and 16k on ppc64 */
+
+#ifdef CONFIG_PPC64
+#define THREAD_SHIFT 14
+#else
+#define THREAD_SHIFT 13
+#endif
+
+#define THREAD_SIZE (1 << THREAD_SHIFT)
+
+#ifndef __ASSEMBLY__
+#include <linux/config.h>
+#include <linux/cache.h>
+#include <asm/processor.h>
+#include <asm/page.h>
+#include <linux/stringify.h>
+
+/*
+ * low level task data.
+ */
+struct thread_info {
+ struct task_struct *task; /* main task structure */
+ struct exec_domain *exec_domain; /* execution domain */
+ int cpu; /* cpu we're on */
+ int preempt_count; /* 0 => preemptable,
+ <0 => BUG */
+ struct restart_block restart_block;
+ unsigned long local_flags; /* private flags for thread */
+
+ /* low level flags - has atomic operations done on it */
+ unsigned long flags ____cacheline_aligned_in_smp;
+};
+
+/*
+ * macros/functions for gaining access to the thread information structure
+ *
+ * preempt_count needs to be 1 initially, until the scheduler is functional.
+ */
+#define INIT_THREAD_INFO(tsk) \
+{ \
+ .task = &tsk, \
+ .exec_domain = &default_exec_domain, \
+ .cpu = 0, \
+ .preempt_count = 1, \
+ .restart_block = { \
+ .fn = do_no_restart_syscall, \
+ }, \
+ .flags = 0, \
+}
+
+#define init_thread_info (init_thread_union.thread_info)
+#define init_stack (init_thread_union.stack)
+
+/* thread information allocation */
+
+#if THREAD_SHIFT >= PAGE_SHIFT
+
+#define THREAD_ORDER (THREAD_SHIFT - PAGE_SHIFT)
+
+#ifdef CONFIG_DEBUG_STACK_USAGE
+#define alloc_thread_info(tsk) \
+ ((struct thread_info *)__get_free_pages(GFP_KERNEL | \
+ __GFP_ZERO, THREAD_ORDER))
+#else
+#define alloc_thread_info(tsk) \
+ ((struct thread_info *)__get_free_pages(GFP_KERNEL, THREAD_ORDER))
+#endif
+#define free_thread_info(ti) free_pages((unsigned long)ti, THREAD_ORDER)
+
+#else /* THREAD_SHIFT < PAGE_SHIFT */
+
+#ifdef CONFIG_DEBUG_STACK_USAGE
+#define alloc_thread_info(tsk) kzalloc(THREAD_SIZE, GFP_KERNEL)
+#else
+#define alloc_thread_info(tsk) kmalloc(THREAD_SIZE, GFP_KERNEL)
+#endif
+#define free_thread_info(ti) kfree(ti)
+
+#endif /* THREAD_SHIFT < PAGE_SHIFT */
+
+/* how to get the thread information struct from C */
+static inline struct thread_info *current_thread_info(void)
+{
+ register unsigned long sp asm("r1");
+
+ /* gcc4, at least, is smart enough to turn this into a single
+ * rlwinm for ppc32 and clrrdi for ppc64 */
+ return (struct thread_info *)(sp & ~(THREAD_SIZE-1));
+}
+
+#endif /* __ASSEMBLY__ */
+
+#define PREEMPT_ACTIVE 0x10000000
+
+/*
+ * thread information flag bit numbers
+ */
+#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
+#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */
+#define TIF_SIGPENDING 2 /* signal pending */
+#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
+#define TIF_POLLING_NRFLAG 4 /* true if poll_idle() is polling
+ TIF_NEED_RESCHED */
+#define TIF_32BIT 5 /* 32 bit binary */
+#define TIF_RUNLATCH 6 /* Is the runlatch enabled? */
+#define TIF_ABI_PENDING 7 /* 32/64 bit switch needed */
+#define TIF_SYSCALL_AUDIT 8 /* syscall auditing active */
+#define TIF_SINGLESTEP 9 /* singlestepping active */
+#define TIF_MEMDIE 10
+#define TIF_SECCOMP 11 /* secure computing */
+#define TIF_RESTOREALL 12 /* Restore all regs (implies NOERROR) */
+#define TIF_NOERROR 14 /* Force successful syscall return */
+#define TIF_RESTORE_SIGMASK 15 /* Restore signal mask in do_signal */
+
+/* as above, but as bit values */
+#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
+#define _TIF_NOTIFY_RESUME (1<<TIF_NOTIFY_RESUME)
+#define _TIF_SIGPENDING (1<<TIF_SIGPENDING)
+#define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED)
+#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
+#define _TIF_32BIT (1<<TIF_32BIT)
+#define _TIF_RUNLATCH (1<<TIF_RUNLATCH)
+#define _TIF_ABI_PENDING (1<<TIF_ABI_PENDING)
+#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
+#define _TIF_SINGLESTEP (1<<TIF_SINGLESTEP)
+#define _TIF_SECCOMP (1<<TIF_SECCOMP)
+#define _TIF_RESTOREALL (1<<TIF_RESTOREALL)
+#define _TIF_NOERROR (1<<TIF_NOERROR)
+#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
+#define _TIF_SYSCALL_T_OR_A (_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP)
+
+#define _TIF_USER_WORK_MASK (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING | \
+ _TIF_NEED_RESCHED | _TIF_RESTORE_SIGMASK)
+#define _TIF_PERSYSCALL_MASK (_TIF_RESTOREALL|_TIF_NOERROR)
+
+/* Bits in local_flags */
+/* Don't move TLF_NAPPING without adjusting the code in entry_32.S */
+#define TLF_NAPPING 0 /* idle thread enabled NAP mode */
+
+#define _TLF_NAPPING (1 << TLF_NAPPING)
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_POWERPC_THREAD_INFO_H */
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