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TOMOYO Linux Cross Reference
Linux/arch/microblaze/include/asm/processor.h

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  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 /*
  3  * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
  4  * Copyright (C) 2008-2009 PetaLogix
  5  * Copyright (C) 2006 Atmark Techno, Inc.
  6  */
  7 
  8 #ifndef _ASM_MICROBLAZE_PROCESSOR_H
  9 #define _ASM_MICROBLAZE_PROCESSOR_H
 10 
 11 #include <asm/ptrace.h>
 12 #include <asm/setup.h>
 13 #include <asm/registers.h>
 14 #include <asm/entry.h>
 15 #include <asm/current.h>
 16 
 17 # ifndef __ASSEMBLY__
 18 /* from kernel/cpu/mb.c */
 19 extern const struct seq_operations cpuinfo_op;
 20 
 21 # define cpu_relax()            barrier()
 22 
 23 #define task_pt_regs(tsk) \
 24                 (((struct pt_regs *)(THREAD_SIZE + task_stack_page(tsk))) - 1)
 25 
 26 /* Do necessary setup to start up a newly executed thread. */
 27 void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp);
 28 
 29 extern void ret_from_fork(void);
 30 extern void ret_from_kernel_thread(void);
 31 
 32 # endif /* __ASSEMBLY__ */
 33 
 34 /*
 35  * This is used to define STACK_TOP, and with MMU it must be below
 36  * kernel base to select the correct PGD when handling MMU exceptions.
 37  */
 38 # define TASK_SIZE      (CONFIG_KERNEL_START)
 39 
 40 /*
 41  * This decides where the kernel will search for a free chunk of vm
 42  * space during mmap's.
 43  */
 44 # define TASK_UNMAPPED_BASE     (TASK_SIZE / 8 * 3)
 45 
 46 # define THREAD_KSP     0
 47 
 48 #  ifndef __ASSEMBLY__
 49 
 50 /* If you change this, you must change the associated assembly-languages
 51  * constants defined below, THREAD_*.
 52  */
 53 struct thread_struct {
 54         /* kernel stack pointer (must be first field in structure) */
 55         unsigned long   ksp;
 56         unsigned long   ksp_limit;      /* if ksp <= ksp_limit stack overflow */
 57         void            *pgdir;         /* root of page-table tree */
 58         struct pt_regs  *regs;          /* Pointer to saved register state */
 59 };
 60 
 61 #  define INIT_THREAD { \
 62         .ksp   = sizeof init_stack + (unsigned long)init_stack, \
 63         .pgdir = swapper_pg_dir, \
 64 }
 65 
 66 unsigned long __get_wchan(struct task_struct *p);
 67 
 68 /* The size allocated for kernel stacks. This _must_ be a power of two! */
 69 # define KERNEL_STACK_SIZE      0x2000
 70 
 71 /* Return some info about the user process TASK.  */
 72 #  define task_tos(task)        ((unsigned long)(task) + KERNEL_STACK_SIZE)
 73 #  define task_regs(task) ((struct pt_regs *)task_tos(task) - 1)
 74 
 75 #  define task_pt_regs_plus_args(tsk) \
 76         ((void *)task_pt_regs(tsk))
 77 
 78 #  define task_sp(task) (task_regs(task)->r1)
 79 #  define task_pc(task) (task_regs(task)->pc)
 80 /* Grotty old names for some.  */
 81 #  define KSTK_EIP(task)        (task_pc(task))
 82 #  define KSTK_ESP(task)        (task_sp(task))
 83 
 84 #  define STACK_TOP     TASK_SIZE
 85 #  define STACK_TOP_MAX STACK_TOP
 86 
 87 #ifdef CONFIG_DEBUG_FS
 88 extern struct dentry *of_debugfs_root;
 89 #endif
 90 
 91 #  endif /* __ASSEMBLY__ */
 92 #endif /* _ASM_MICROBLAZE_PROCESSOR_H */
 93 

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