/* SPDX-License-Identifier: GPL-2.0-only */ /* * Port on Texas Instruments TMS320C6x architecture * * Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated * Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com) * * Updated for 2.6.3x: Mark Salter <msalter@redhat.com> */ #ifndef _ASM_C6X_THREAD_INFO_H #define _ASM_C6X_THREAD_INFO_H #ifdef __KERNEL__ #include <asm/page.h> #ifdef CONFIG_4KSTACKS #define THREAD_SIZE 4096 #define THREAD_SHIFT 12 #define THREAD_SIZE_ORDER 0 #else #define THREAD_SIZE 8192 #define THREAD_SHIFT 13 #define THREAD_SIZE_ORDER 1 #endif #define THREAD_START_SP (THREAD_SIZE - 8) #ifndef __ASSEMBLY__ typedef struct { unsigned long seg; } mm_segment_t; /* * low level task data. */ struct thread_info { 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 */ mm_segment_t addr_limit; /* thread address space */ }; /* * 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) \ { \ .task = &tsk, \ .flags = 0, \ .cpu = 0, \ .preempt_count = INIT_PREEMPT_COUNT, \ .addr_limit = KERNEL_DS, \ } /* get the thread information struct of current task */ static inline __attribute__((const)) struct thread_info *current_thread_info(void) { struct thread_info *ti; asm volatile (" clr .s2 B15,0,%1,%0\n" : "=b" (ti) : "Iu5" (THREAD_SHIFT - 1)); return ti; } #define get_thread_info(ti) get_task_struct((ti)->task) #define put_thread_info(ti) put_task_struct((ti)->task) #endif /* __ASSEMBLY__ */ /* * thread information flag bit numbers * - 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_RESTORE_SIGMASK 4 /* restore signal mask in do_signal() */ #define TIF_MEMDIE 17 /* OOM killer killed process */ #define TIF_WORK_MASK 0x00007FFE /* work on irq/exception return */ #define TIF_ALLWORK_MASK 0x00007FFF /* work on any return to u-space */ #endif /* __KERNEL__ */ #endif /* _ASM_C6X_THREAD_INFO_H */