1 files changed, 153 insertions, 0 deletions

diff --git a/include/asm-sparc/thread_info.h b/include/asm-sparc/thread_info.h
new file mode 100644
index 000000000000..104f03c55416
--- /dev/null
+++ b/include/asm-sparc/thread_info.h
@@ -0,0 +1,153 @@
+/*
+ * thread_info.h: sparc low-level thread information
+ * adapted from the ppc version by Pete Zaitcev, which was
+ * adapted from the i386 version by Paul Mackerras
+ *
+ * Copyright (C) 2002  David Howells (dhowells@redhat.com)
+ * Copyright (c) 2002  Pete Zaitcev (zaitcev@yahoo.com)
+ * - Incorporating suggestions made by Linus Torvalds and Dave Miller
+ */
+
+#ifndef _ASM_THREAD_INFO_H
+#define _ASM_THREAD_INFO_H
+
+#ifdef __KERNEL__
+
+#ifndef __ASSEMBLY__
+
+#include <asm/btfixup.h>
+#include <asm/ptrace.h>
+#include <asm/page.h>
+
+/*
+ * Low level task data.
+ *
+ * If you change this, change the TI_* offsets below to match.
+ */
+#define NSWINS 8
+struct thread_info {
+        unsigned long           uwinmask;
+        struct task_struct      *task;          /* main task structure */
+        struct exec_domain      *exec_domain;   /* execution domain */
+        unsigned long           flags;          /* low level flags */
+
+        int                     cpu;            /* cpu we're on */
+        int                     preempt_count;
+        int                     softirq_count;
+        int                     hardirq_count;
+
+        /* Context switch saved kernel state. */
+        unsigned long ksp;      /* ... ksp __attribute__ ((aligned (8))); */
+        unsigned long kpc;
+        unsigned long kpsr;
+        unsigned long kwim;
+
+        /* A place to store user windows and stack pointers
+         * when the stack needs inspection.
+         */
+        struct reg_window       reg_window[NSWINS];     /* align for ldd! */
+        unsigned long           rwbuf_stkptrs[NSWINS];
+        unsigned long           w_saved;
+
+        struct restart_block    restart_block;
+};
+
+/*
+ * 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)                           \
+{                                                       \
+        .uwinmask       =       0,                      \
+        .task           =       &tsk,                   \
+        .exec_domain    =       &default_exec_domain,   \
+        .flags          =       0,                      \
+        .cpu            =       0,                      \
+        .preempt_count  =       1,                      \
+        .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_reg asm("g6");
+#define current_thread_info()   (current_thread_info_reg)
+
+/*
+ * thread information allocation
+ */
+#if PAGE_SHIFT == 13
+#define THREAD_INFO_ORDER  0
+#else /* PAGE_SHIFT */
+#define THREAD_INFO_ORDER  1
+#endif
+
+BTFIXUPDEF_CALL(struct thread_info *, alloc_thread_info, void)
+#define alloc_thread_info(tsk) BTFIXUP_CALL(alloc_thread_info)()
+
+BTFIXUPDEF_CALL(void, free_thread_info, struct thread_info *)
+#define free_thread_info(ti) BTFIXUP_CALL(free_thread_info)(ti)
+
+#define get_thread_info(ti)     get_task_struct((ti)->task)
+#define put_thread_info(ti)     put_task_struct((ti)->task)
+
+#endif /* __ASSEMBLY__ */
+
+/*
+ * Size of kernel stack for each process.
+ * Observe the order of get_free_pages() in alloc_thread_info().
+ * The sun4 has 8K stack too, because it's short on memory, and 16K is a waste.
+ */
+#define THREAD_SIZE             8192
+
+/*
+ * Offsets in thread_info structure, used in assembly code
+ * The "#define REGWIN_SZ 0x40" was abolished, so no multiplications.
+ */
+#define TI_UWINMASK     0x00    /* uwinmask */
+#define TI_TASK         0x04
+#define TI_EXECDOMAIN   0x08    /* exec_domain */
+#define TI_FLAGS        0x0c
+#define TI_CPU          0x10
+#define TI_PREEMPT      0x14    /* preempt_count */
+#define TI_SOFTIRQ      0x18    /* softirq_count */
+#define TI_HARDIRQ      0x1c    /* hardirq_count */
+#define TI_KSP          0x20    /* ksp */
+#define TI_KPC          0x24    /* kpc (ldd'ed with kpc) */
+#define TI_KPSR         0x28    /* kpsr */
+#define TI_KWIM         0x2c    /* kwim (ldd'ed with kpsr) */
+#define TI_REG_WINDOW   0x30
+#define TI_RWIN_SPTRS   0x230
+#define TI_W_SAVED      0x250
+/* #define TI_RESTART_BLOCK 0x25n */ /* Nobody cares */
+
+#define PREEMPT_ACTIVE          0x4000000
+
+/*
+ * 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_USEDFPU             8       /* FPU was used by this task
+                                         * this quantum (SMP) */
+#define TIF_POLLING_NRFLAG      9       /* true if poll_idle() is polling
+                                         * TIF_NEED_RESCHED */
+#define TIF_MEMDIE              10
+
+/* 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_USEDFPU            (1<<TIF_USEDFPU)
+#define _TIF_POLLING_NRFLAG     (1<<TIF_POLLING_NRFLAG)
+
+#endif /* __KERNEL__ */
+
+#endif /* _ASM_THREAD_INFO_H */