diff options
Diffstat (limited to 'arch/sparc/include/asm/thread_info_32.h')
| -rw-r--r-- | arch/sparc/include/asm/thread_info_32.h | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/thread_info_32.h b/arch/sparc/include/asm/thread_info_32.h new file mode 100644 index 000000000..45b4955b2 --- /dev/null +++ b/arch/sparc/include/asm/thread_info_32.h @@ -0,0 +1,130 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * 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/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 */ + 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; + + u32 __unused; + + /* 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_window32 reg_window[NSWINS]; /* align for ldd! */ + unsigned long rwbuf_stkptrs[NSWINS]; + unsigned long w_saved; +}; + +/* + * macros/functions for gaining access to the thread information structure + */ +#define INIT_THREAD_INFO(tsk) \ +{ \ + .uwinmask = 0, \ + .task = &tsk, \ + .flags = 0, \ + .cpu = 0, \ + .preempt_count = INIT_PREEMPT_COUNT, \ +} + +/* 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_SIZE_ORDER 1 + +#endif /* __ASSEMBLY__ */ + +/* Size of kernel stack for each process */ +#define THREAD_SIZE (2 * PAGE_SIZE) + +/* + * 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_FLAGS 0x08 +#define TI_CPU 0x0c +#define TI_PREEMPT 0x10 /* preempt_count */ +#define TI_SOFTIRQ 0x14 /* softirq_count */ +#define TI_HARDIRQ 0x18 /* 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 + +/* + * 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_NOTIFY_SIGNAL 5 /* signal notifications exist */ +#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 /* is terminating due to OOM killer */ + +/* 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_NOTIFY_SIGNAL (1<<TIF_NOTIFY_SIGNAL) +#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_NOTIFY_SIGNAL) + +#define is_32bit_task() (1) + +#endif /* __KERNEL__ */ + +#endif /* _ASM_THREAD_INFO_H */ |