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93 lines
2.4 KiB
93 lines
2.4 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Port on Texas Instruments TMS320C6x architecture |
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* |
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* Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated |
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* Author: Aurelien Jacquiot ([email protected]) |
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* |
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* Updated for 2.6.3x: Mark Salter <[email protected]> |
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*/ |
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#ifndef _ASM_C6X_THREAD_INFO_H |
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#define _ASM_C6X_THREAD_INFO_H |
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#ifdef __KERNEL__ |
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#include <asm/page.h> |
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#ifdef CONFIG_4KSTACKS |
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#define THREAD_SIZE 4096 |
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#define THREAD_SHIFT 12 |
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#define THREAD_SIZE_ORDER 0 |
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#else |
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#define THREAD_SIZE 8192 |
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#define THREAD_SHIFT 13 |
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#define THREAD_SIZE_ORDER 1 |
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#endif |
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#define THREAD_START_SP (THREAD_SIZE - 8) |
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#ifndef __ASSEMBLY__ |
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typedef struct { |
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unsigned long seg; |
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} mm_segment_t; |
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/* |
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* low level task data. |
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*/ |
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struct thread_info { |
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struct task_struct *task; /* main task structure */ |
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unsigned long flags; /* low level flags */ |
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int cpu; /* cpu we're on */ |
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int preempt_count; /* 0 = preemptable, <0 = BUG */ |
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mm_segment_t addr_limit; /* thread address space */ |
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}; |
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/* |
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* macros/functions for gaining access to the thread information structure |
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* |
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* preempt_count needs to be 1 initially, until the scheduler is functional. |
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*/ |
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#define INIT_THREAD_INFO(tsk) \ |
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{ \ |
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.task = &tsk, \ |
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.flags = 0, \ |
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.cpu = 0, \ |
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.preempt_count = INIT_PREEMPT_COUNT, \ |
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.addr_limit = KERNEL_DS, \ |
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} |
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/* get the thread information struct of current task */ |
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static inline __attribute__((const)) |
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struct thread_info *current_thread_info(void) |
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{ |
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struct thread_info *ti; |
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asm volatile (" clr .s2 B15,0,%1,%0\n" |
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: "=b" (ti) |
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: "Iu5" (THREAD_SHIFT - 1)); |
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return ti; |
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} |
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#define get_thread_info(ti) get_task_struct((ti)->task) |
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#define put_thread_info(ti) put_task_struct((ti)->task) |
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#endif /* __ASSEMBLY__ */ |
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/* |
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* thread information flag bit numbers |
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* - pending work-to-be-done flags are in LSW |
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* - other flags in MSW |
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*/ |
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#define TIF_SYSCALL_TRACE 0 /* syscall trace active */ |
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#define TIF_NOTIFY_RESUME 1 /* resumption notification requested */ |
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#define TIF_SIGPENDING 2 /* signal pending */ |
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#define TIF_NEED_RESCHED 3 /* rescheduling necessary */ |
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#define TIF_RESTORE_SIGMASK 4 /* restore signal mask in do_signal() */ |
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#define TIF_MEMDIE 17 /* OOM killer killed process */ |
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#define TIF_WORK_MASK 0x00007FFE /* work on irq/exception return */ |
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#define TIF_ALLWORK_MASK 0x00007FFF /* work on any return to u-space */ |
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#endif /* __KERNEL__ */ |
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#endif /* _ASM_C6X_THREAD_INFO_H */
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