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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-alpha/thread_info.h | |
download | blackbird-op-linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz blackbird-op-linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/asm-alpha/thread_info.h')
-rw-r--r-- | include/asm-alpha/thread_info.h | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/include/asm-alpha/thread_info.h b/include/asm-alpha/thread_info.h new file mode 100644 index 000000000000..d51491ed00b8 --- /dev/null +++ b/include/asm-alpha/thread_info.h @@ -0,0 +1,98 @@ +#ifndef _ALPHA_THREAD_INFO_H +#define _ALPHA_THREAD_INFO_H + +#ifdef __KERNEL__ + +#ifndef __ASSEMBLY__ +#include <asm/processor.h> +#include <asm/types.h> +#include <asm/hwrpb.h> +#endif + +#ifndef __ASSEMBLY__ +struct thread_info { + struct pcb_struct pcb; /* palcode state */ + + struct task_struct *task; /* main task structure */ + unsigned int flags; /* low level flags */ + unsigned int ieee_state; /* see fpu.h */ + + struct exec_domain *exec_domain; /* execution domain */ + mm_segment_t addr_limit; /* thread address space */ + unsigned cpu; /* current CPU */ + int preempt_count; /* 0 => preemptable, <0 => BUG */ + + int bpt_nsaved; + unsigned long bpt_addr[2]; /* breakpoint handling */ + unsigned int bpt_insn[2]; + + struct restart_block restart_block; +}; + +/* + * Macros/functions for gaining access to the thread information structure. + */ +#define INIT_THREAD_INFO(tsk) \ +{ \ + .task = &tsk, \ + .exec_domain = &default_exec_domain, \ + .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 thread information struct from C. */ +register struct thread_info *__current_thread_info __asm__("$8"); +#define current_thread_info() __current_thread_info + +/* Thread information allocation. */ +#define THREAD_SIZE (2*PAGE_SIZE) +#define alloc_thread_info(tsk) \ + ((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) + +#endif /* __ASSEMBLY__ */ + +#define PREEMPT_ACTIVE 0x40000000 + +/* + * Thread information flags: + * - these are process state flags and used from assembly + * - pending work-to-be-done flags come first to fit in and immediate operand. + * + * TIF_SYSCALL_TRACE is known to be 0 via blbs. + */ +#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 /* poll_idle is polling NEED_RESCHED */ +#define TIF_DIE_IF_KERNEL 5 /* dik recursion lock */ +#define TIF_UAC_NOPRINT 6 /* see sysinfo.h */ +#define TIF_UAC_NOFIX 7 +#define TIF_UAC_SIGBUS 8 +#define TIF_MEMDIE 9 + +#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) + +/* Work to do on interrupt/exception return. */ +#define _TIF_WORK_MASK (_TIF_NOTIFY_RESUME \ + | _TIF_SIGPENDING \ + | _TIF_NEED_RESCHED) + +/* Work to do on any return to userspace. */ +#define _TIF_ALLWORK_MASK (_TIF_WORK_MASK \ + | _TIF_SYSCALL_TRACE) + +#endif /* __KERNEL__ */ +#endif /* _ALPHA_THREAD_INFO_H */ |