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97 lines
2.6 KiB
97 lines
2.6 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Copyright (C) 2008-2009 Michal Simek <[email protected]> |
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* Copyright (C) 2008-2009 PetaLogix |
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* Copyright (C) 2006 Atmark Techno, Inc. |
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*/ |
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#ifndef _ASM_MICROBLAZE_PROCESSOR_H |
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#define _ASM_MICROBLAZE_PROCESSOR_H |
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#include <asm/ptrace.h> |
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#include <asm/setup.h> |
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#include <asm/registers.h> |
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#include <asm/entry.h> |
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#include <asm/current.h> |
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# ifndef __ASSEMBLY__ |
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/* from kernel/cpu/mb.c */ |
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extern const struct seq_operations cpuinfo_op; |
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# define cpu_relax() barrier() |
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#define task_pt_regs(tsk) \ |
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(((struct pt_regs *)(THREAD_SIZE + task_stack_page(tsk))) - 1) |
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/* Do necessary setup to start up a newly executed thread. */ |
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void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp); |
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extern void ret_from_fork(void); |
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extern void ret_from_kernel_thread(void); |
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# endif /* __ASSEMBLY__ */ |
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/* |
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* This is used to define STACK_TOP, and with MMU it must be below |
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* kernel base to select the correct PGD when handling MMU exceptions. |
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*/ |
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# define TASK_SIZE (CONFIG_KERNEL_START) |
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/* |
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* This decides where the kernel will search for a free chunk of vm |
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* space during mmap's. |
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*/ |
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# define TASK_UNMAPPED_BASE (TASK_SIZE / 8 * 3) |
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# define THREAD_KSP 0 |
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# ifndef __ASSEMBLY__ |
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/* If you change this, you must change the associated assembly-languages |
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* constants defined below, THREAD_*. |
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*/ |
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struct thread_struct { |
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/* kernel stack pointer (must be first field in structure) */ |
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unsigned long ksp; |
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unsigned long ksp_limit; /* if ksp <= ksp_limit stack overflow */ |
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void *pgdir; /* root of page-table tree */ |
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struct pt_regs *regs; /* Pointer to saved register state */ |
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}; |
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# define INIT_THREAD { \ |
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.ksp = sizeof init_stack + (unsigned long)init_stack, \ |
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.pgdir = swapper_pg_dir, \ |
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} |
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/* Free all resources held by a thread. */ |
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static inline void release_thread(struct task_struct *dead_task) |
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{ |
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} |
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unsigned long get_wchan(struct task_struct *p); |
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/* The size allocated for kernel stacks. This _must_ be a power of two! */ |
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# define KERNEL_STACK_SIZE 0x2000 |
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/* Return some info about the user process TASK. */ |
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# define task_tos(task) ((unsigned long)(task) + KERNEL_STACK_SIZE) |
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# define task_regs(task) ((struct pt_regs *)task_tos(task) - 1) |
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# define task_pt_regs_plus_args(tsk) \ |
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((void *)task_pt_regs(tsk)) |
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# define task_sp(task) (task_regs(task)->r1) |
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# define task_pc(task) (task_regs(task)->pc) |
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/* Grotty old names for some. */ |
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# define KSTK_EIP(task) (task_pc(task)) |
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# define KSTK_ESP(task) (task_sp(task)) |
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# define STACK_TOP TASK_SIZE |
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# define STACK_TOP_MAX STACK_TOP |
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#ifdef CONFIG_DEBUG_FS |
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extern struct dentry *of_debugfs_root; |
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#endif |
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# endif /* __ASSEMBLY__ */ |
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#endif /* _ASM_MICROBLAZE_PROCESSOR_H */
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