#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__ #ifndef __ASSEMBLY__ #include <asm/processor.h> struct thread_info { struct task_struct *task; /* main task structure */ struct exec_domain *exec_domain; /* execution domain */ __u32 flags; /* low level flags */ __u32 cpu; int preempt_count; /* 0 => preemptable, <0 => BUG */ struct restart_block restart_block; __u8 supervisor_stack[0]; }; #endif #define PREEMPT_ACTIVE 0x10000000 /* * 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, \ .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 */ static inline struct thread_info *current_thread_info(void) { struct thread_info *ti; __asm__("stc r7_bank, %0" : "=r" (ti)); return ti; } /* thread information allocation */ #define THREAD_SIZE (2*PAGE_SIZE) #define alloc_thread_info(ti) ((struct thread_info *) __get_free_pages(GFP_KERNEL,1)) #define free_thread_info(ti) free_pages((unsigned long) (ti), 1) #define get_thread_info(ti) get_task_struct((ti)->task) #define put_thread_info(ti) put_task_struct((ti)->task) #else /* !__ASSEMBLY__ */ /* how to get the thread information struct from ASM */ #define GET_THREAD_INFO(reg) \ stc r7_bank, reg #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_NOTIFY_RESUME 1 /* resumption notification requested */ #define TIF_SIGPENDING 2 /* signal pending */ #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ #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_USERSPACE 31 /* true if FS sets userspace */ #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) #define _TIF_USERSPACE (1<<TIF_USERSPACE) #define _TIF_WORK_MASK 0x000000FE /* work to do on interrupt/exception return */ #define _TIF_ALLWORK_MASK 0x000000FF /* work to do on any return to u-space */ #endif /* __KERNEL__ */ #endif /* __ASM_SH_THREAD_INFO_H */