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 */
 19extern 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. */
 27void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp);
 28
 29extern void ret_from_fork(void);
 30extern void ret_from_kernel_thread(void);
 31
 32# endif /* __ASSEMBLY__ */
 33
 34# ifndef CONFIG_MMU
 35/*
 36 * User space process size: memory size
 37 *
 38 * TASK_SIZE on MMU cpu is usually 1GB. However, on no-MMU arch, both
 39 * user processes and the kernel is on the same memory region. They
 40 * both share the memory space and that is limited by the amount of
 41 * physical memory. thus, we set TASK_SIZE == amount of total memory.
 42 */
 43# define TASK_SIZE	(0x81000000 - 0x80000000)
 44
 45/*
 46 * This decides where the kernel will search for a free chunk of vm
 47 * space during mmap's. We won't be using it
 48 */
 49# define TASK_UNMAPPED_BASE	0
 50
 51/* definition in include/linux/sched.h */
 52struct task_struct;
 53
 54/* thread_struct is gone. use thread_info instead. */
 55struct thread_struct { };
 56# define INIT_THREAD	{ }
 57
 58/* Free all resources held by a thread. */
 59static inline void release_thread(struct task_struct *dead_task)
 60{
 61}
 62
 63extern unsigned long get_wchan(struct task_struct *p);
 64
 65# define KSTK_EIP(tsk)	(0)
 66# define KSTK_ESP(tsk)	(0)
 67
 68# else /* CONFIG_MMU */
 69
 70/*
 71 * This is used to define STACK_TOP, and with MMU it must be below
 72 * kernel base to select the correct PGD when handling MMU exceptions.
 73 */
 74# define TASK_SIZE	(CONFIG_KERNEL_START)
 75
 76/*
 77 * This decides where the kernel will search for a free chunk of vm
 78 * space during mmap's.
 79 */
 80# define TASK_UNMAPPED_BASE	(TASK_SIZE / 8 * 3)
 81
 82# define THREAD_KSP	0
 83
 84#  ifndef __ASSEMBLY__
 85
 86/* If you change this, you must change the associated assembly-languages
 87 * constants defined below, THREAD_*.
 88 */
 89struct thread_struct {
 90	/* kernel stack pointer (must be first field in structure) */
 91	unsigned long	ksp;
 92	unsigned long	ksp_limit;	/* if ksp <= ksp_limit stack overflow */
 93	void		*pgdir;		/* root of page-table tree */
 94	struct pt_regs	*regs;		/* Pointer to saved register state */
 95};
 96
 97#  define INIT_THREAD { \
 98	.ksp   = sizeof init_stack + (unsigned long)init_stack, \
 99	.pgdir = swapper_pg_dir, \
100}
101
102/* Free all resources held by a thread. */
103static inline void release_thread(struct task_struct *dead_task)
104{
105}
106
107unsigned long get_wchan(struct task_struct *p);
108
109/* The size allocated for kernel stacks. This _must_ be a power of two! */
110# define KERNEL_STACK_SIZE	0x2000
111
112/* Return some info about the user process TASK.  */
113#  define task_tos(task)	((unsigned long)(task) + KERNEL_STACK_SIZE)
114#  define task_regs(task) ((struct pt_regs *)task_tos(task) - 1)
115
116#  define task_pt_regs_plus_args(tsk) \
117	((void *)task_pt_regs(tsk))
118
119#  define task_sp(task)	(task_regs(task)->r1)
120#  define task_pc(task)	(task_regs(task)->pc)
121/* Grotty old names for some.  */
122#  define KSTK_EIP(task)	(task_pc(task))
123#  define KSTK_ESP(task)	(task_sp(task))
124
125/* FIXME */
126#  define deactivate_mm(tsk, mm)	do { } while (0)
127
128#  define STACK_TOP	TASK_SIZE
129#  define STACK_TOP_MAX	STACK_TOP
130
131#ifdef CONFIG_DEBUG_FS
132extern struct dentry *of_debugfs_root;
133#endif
134
135#  endif /* __ASSEMBLY__ */
136# endif /* CONFIG_MMU */
137#endif /* _ASM_MICROBLAZE_PROCESSOR_H */

 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 */
19extern 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. */
27void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp);
28
29extern void ret_from_fork(void);
30extern 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 */
53struct 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/* Free all resources held by a thread. */
67static inline void release_thread(struct task_struct *dead_task)
68{
69}
70
71unsigned long get_wchan(struct task_struct *p);
72
73/* The size allocated for kernel stacks. This _must_ be a power of two! */
74# define KERNEL_STACK_SIZE	0x2000
75
76/* Return some info about the user process TASK.  */
77#  define task_tos(task)	((unsigned long)(task) + KERNEL_STACK_SIZE)
78#  define task_regs(task) ((struct pt_regs *)task_tos(task) - 1)
79
80#  define task_pt_regs_plus_args(tsk) \
81	((void *)task_pt_regs(tsk))
82
83#  define task_sp(task)	(task_regs(task)->r1)
84#  define task_pc(task)	(task_regs(task)->pc)
85/* Grotty old names for some.  */
86#  define KSTK_EIP(task)	(task_pc(task))
87#  define KSTK_ESP(task)	(task_sp(task))
88
 
 
 
89#  define STACK_TOP	TASK_SIZE
90#  define STACK_TOP_MAX	STACK_TOP
91
92#ifdef CONFIG_DEBUG_FS
93extern struct dentry *of_debugfs_root;
94#endif
95
96#  endif /* __ASSEMBLY__ */
 
97#endif /* _ASM_MICROBLAZE_PROCESSOR_H */