| /* |
| * 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; /* 0 => preemptable, |
| <0 => BUG */ |
| 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 |
| */ |
| #define THREAD_INFO_ORDER 1 |
| |
| #define __HAVE_ARCH_THREAD_INFO_ALLOCATOR |
| |
| 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) |
| |
| #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 /* callback before returning to user */ |
| #define TIF_SIGPENDING 2 /* signal pending */ |
| #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ |
| #define TIF_RESTORE_SIGMASK 4 /* restore signal mask in do_signal() */ |
| #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_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK) |
| #define _TIF_USEDFPU (1<<TIF_USEDFPU) |
| #define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG) |
| |
| #define _TIF_DO_NOTIFY_RESUME_MASK (_TIF_NOTIFY_RESUME | \ |
| _TIF_SIGPENDING | \ |
| _TIF_RESTORE_SIGMASK) |
| |
| #endif /* __KERNEL__ */ |
| |
| #endif /* _ASM_THREAD_INFO_H */ |