summaryrefslogtreecommitdiffstats
path: root/arch/sh/include/asm/thread_info.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/sh/include/asm/thread_info.h')
-rw-r--r--arch/sh/include/asm/thread_info.h162
1 files changed, 162 insertions, 0 deletions
diff --git a/arch/sh/include/asm/thread_info.h b/arch/sh/include/asm/thread_info.h
new file mode 100644
index 00000000000..0a894cafb1d
--- /dev/null
+++ b/arch/sh/include/asm/thread_info.h
@@ -0,0 +1,162 @@
+#ifndef __ASM_SH_THREAD_INFO_H
+#define __ASM_SH_THREAD_INFO_H
+
+/* SuperH version
+ * Copyright (C) 2002 Niibe Yutaka
+ *
+ * The copyright of original i386 version is:
+ *
+ * Copyright (C) 2002 David Howells (dhowells@redhat.com)
+ * - Incorporating suggestions made by Linus Torvalds and Dave Miller
+ */
+#ifdef __KERNEL__
+#include <asm/page.h>
+
+#ifndef __ASSEMBLY__
+#include <asm/processor.h>
+
+struct thread_info {
+ struct task_struct *task; /* main task structure */
+ struct exec_domain *exec_domain; /* execution domain */
+ unsigned long flags; /* low level flags */
+ __u32 cpu;
+ int preempt_count; /* 0 => preemptable, <0 => BUG */
+ mm_segment_t addr_limit; /* thread address space */
+ struct restart_block restart_block;
+ unsigned long previous_sp; /* sp of previous stack in case
+ of nested IRQ stacks */
+ __u8 supervisor_stack[0];
+};
+
+#endif
+
+#define PREEMPT_ACTIVE 0x10000000
+
+#if defined(CONFIG_4KSTACKS)
+#define THREAD_SIZE_ORDER (0)
+#elif defined(CONFIG_PAGE_SIZE_4KB)
+#define THREAD_SIZE_ORDER (1)
+#elif defined(CONFIG_PAGE_SIZE_8KB)
+#define THREAD_SIZE_ORDER (1)
+#elif defined(CONFIG_PAGE_SIZE_16KB)
+#define THREAD_SIZE_ORDER (0)
+#elif defined(CONFIG_PAGE_SIZE_64KB)
+#define THREAD_SIZE_ORDER (0)
+#else
+#error "Unknown thread size"
+#endif
+
+#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER)
+#define STACK_WARN (THREAD_SIZE >> 3)
+
+/*
+ * macros/functions for gaining access to the thread information structure
+ */
+#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)
+
+/* how to get the current stack pointer from C */
+register unsigned long current_stack_pointer asm("r15") __used;
+
+/* how to get the thread information struct from C */
+static inline struct thread_info *current_thread_info(void)
+{
+ struct thread_info *ti;
+#if defined(CONFIG_SUPERH64)
+ __asm__ __volatile__ ("getcon cr17, %0" : "=r" (ti));
+#elif defined(CONFIG_CPU_HAS_SR_RB)
+ __asm__ __volatile__ ("stc r7_bank, %0" : "=r" (ti));
+#else
+ unsigned long __dummy;
+
+ __asm__ __volatile__ (
+ "mov r15, %0\n\t"
+ "and %1, %0\n\t"
+ : "=&r" (ti), "=r" (__dummy)
+ : "1" (~(THREAD_SIZE - 1))
+ : "memory");
+#endif
+
+ return ti;
+}
+
+#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
+
+/* thread information allocation */
+#ifdef CONFIG_DEBUG_STACK_USAGE
+#define alloc_thread_info(ti) kzalloc(THREAD_SIZE, GFP_KERNEL)
+#else
+#define alloc_thread_info(ti) kmalloc(THREAD_SIZE, GFP_KERNEL)
+#endif
+#define free_thread_info(ti) kfree(ti)
+
+#endif /* __ASSEMBLY__ */
+
+/*
+ * 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_RESTORE_SIGMASK 3 /* restore signal mask in do_signal() */
+#define TIF_SINGLESTEP 4 /* singlestepping active */
+#define TIF_SYSCALL_AUDIT 5 /* syscall auditing active */
+#define TIF_SECCOMP 6 /* secure computing */
+#define TIF_NOTIFY_RESUME 7 /* callback before returning to user */
+#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
+#define TIF_FREEZE 19 /* 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_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
+#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
+#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
+#define _TIF_SECCOMP (1 << TIF_SECCOMP)
+#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME)
+#define _TIF_USEDFPU (1 << TIF_USEDFPU)
+#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
+#define _TIF_FREEZE (1 << TIF_FREEZE)
+
+/*
+ * _TIF_ALLWORK_MASK and _TIF_WORK_MASK need to fit within a byte, or we
+ * blow the tst immediate size constraints and need to fix up
+ * arch/sh/kernel/entry-common.S.
+ */
+
+/* work to do in syscall trace */
+#define _TIF_WORK_SYSCALL_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \
+ _TIF_SYSCALL_AUDIT | _TIF_SECCOMP)
+
+/* work to do on any return to u-space */
+#define _TIF_ALLWORK_MASK (_TIF_SYSCALL_TRACE | _TIF_SIGPENDING | \
+ _TIF_NEED_RESCHED | _TIF_SYSCALL_AUDIT | \
+ _TIF_SINGLESTEP | _TIF_RESTORE_SIGMASK | \
+ _TIF_NOTIFY_RESUME)
+
+/* work to do on interrupt/exception return */
+#define _TIF_WORK_MASK (_TIF_ALLWORK_MASK & ~(_TIF_SYSCALL_TRACE | \
+ _TIF_SYSCALL_AUDIT | _TIF_SINGLESTEP))
+
+#endif /* __KERNEL__ */
+
+#endif /* __ASM_SH_THREAD_INFO_H */