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/*
  2 * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
  3 * Copyright (C) 2008-2009 PetaLogix
  4 * Copyright (C) 2006 Atmark Techno, Inc.
  5 *
  6 * This file is subject to the terms and conditions of the GNU General Public
  7 * License. See the file "COPYING" in the main directory of this archive
  8 * for more details.
  9 */
 10
 11#ifndef _ASM_MICROBLAZE_PROCESSOR_H
 12#define _ASM_MICROBLAZE_PROCESSOR_H
 13
 14#include <asm/ptrace.h>
 15#include <asm/setup.h>
 16#include <asm/registers.h>
 17#include <asm/entry.h>
 18#include <asm/current.h>
 19
 20# ifndef __ASSEMBLY__
 21/* from kernel/cpu/mb.c */
 22extern const struct seq_operations cpuinfo_op;
 23
 24# define cpu_relax()		barrier()
 25# define cpu_relax_lowlatency()	cpu_relax()
 26
 27#define task_pt_regs(tsk) \
 28		(((struct pt_regs *)(THREAD_SIZE + task_stack_page(tsk))) - 1)
 29
 30/* Do necessary setup to start up a newly executed thread. */
 31void start_thread(struct pt_regs *regs, unsigned long pc, unsigned long usp);
 32
 33extern void ret_from_fork(void);
 34extern void ret_from_kernel_thread(void);
 35
 36# endif /* __ASSEMBLY__ */
 37
 38# ifndef CONFIG_MMU
 39/*
 40 * User space process size: memory size
 41 *
 42 * TASK_SIZE on MMU cpu is usually 1GB. However, on no-MMU arch, both
 43 * user processes and the kernel is on the same memory region. They
 44 * both share the memory space and that is limited by the amount of
 45 * physical memory. thus, we set TASK_SIZE == amount of total memory.
 46 */
 47# define TASK_SIZE	(0x81000000 - 0x80000000)
 48
 49/*
 50 * Default implementation of macro that returns current
 51 * instruction pointer ("program counter").
 52 */
 53# define current_text_addr() ({ __label__ _l; _l: &&_l; })
 54
 55/*
 56 * This decides where the kernel will search for a free chunk of vm
 57 * space during mmap's. We won't be using it
 58 */
 59# define TASK_UNMAPPED_BASE	0
 60
 61/* definition in include/linux/sched.h */
 62struct task_struct;
 63
 64/* thread_struct is gone. use thread_info instead. */
 65struct thread_struct { };
 66# define INIT_THREAD	{ }
 67
 68/* Free all resources held by a thread. */
 69static inline void release_thread(struct task_struct *dead_task)
 70{
 71}
 72
 73/* Free all resources held by a thread. */
 74static inline void exit_thread(void)
 75{
 76}
 77
 78extern unsigned long thread_saved_pc(struct task_struct *t);
 79
 80extern unsigned long get_wchan(struct task_struct *p);
 81
 82# define KSTK_EIP(tsk)	(0)
 83# define KSTK_ESP(tsk)	(0)
 84
 85# else /* CONFIG_MMU */
 86
 87/*
 88 * This is used to define STACK_TOP, and with MMU it must be below
 89 * kernel base to select the correct PGD when handling MMU exceptions.
 90 */
 91# define TASK_SIZE	(CONFIG_KERNEL_START)
 92
 93/*
 94 * This decides where the kernel will search for a free chunk of vm
 95 * space during mmap's.
 96 */
 97# define TASK_UNMAPPED_BASE	(TASK_SIZE / 8 * 3)
 98
 99# define THREAD_KSP	0
100
101#  ifndef __ASSEMBLY__
102
103/*
104 * Default implementation of macro that returns current
105 * instruction pointer ("program counter").
106 */
107#  define current_text_addr()	({ __label__ _l; _l: &&_l; })
108
109/* If you change this, you must change the associated assembly-languages
110 * constants defined below, THREAD_*.
111 */
112struct thread_struct {
113	/* kernel stack pointer (must be first field in structure) */
114	unsigned long	ksp;
115	unsigned long	ksp_limit;	/* if ksp <= ksp_limit stack overflow */
116	void		*pgdir;		/* root of page-table tree */
117	struct pt_regs	*regs;		/* Pointer to saved register state */
118};
119
120#  define INIT_THREAD { \
121	.ksp   = sizeof init_stack + (unsigned long)init_stack, \
122	.pgdir = swapper_pg_dir, \
123}
124
125/* Free all resources held by a thread. */
126static inline void release_thread(struct task_struct *dead_task)
127{
128}
129
130/* Free current thread data structures etc.  */
131static inline void exit_thread(void)
132{
133}
134
135/* Return saved (kernel) PC of a blocked thread.  */
136#  define thread_saved_pc(tsk)	\
137	((tsk)->thread.regs ? (tsk)->thread.regs->r15 : 0)
138
139unsigned long get_wchan(struct task_struct *p);
140
141/* The size allocated for kernel stacks. This _must_ be a power of two! */
142# define KERNEL_STACK_SIZE	0x2000
143
144/* Return some info about the user process TASK.  */
145#  define task_tos(task)	((unsigned long)(task) + KERNEL_STACK_SIZE)
146#  define task_regs(task) ((struct pt_regs *)task_tos(task) - 1)
147
148#  define task_pt_regs_plus_args(tsk) \
149	((void *)task_pt_regs(tsk))
150
151#  define task_sp(task)	(task_regs(task)->r1)
152#  define task_pc(task)	(task_regs(task)->pc)
153/* Grotty old names for some.  */
154#  define KSTK_EIP(task)	(task_pc(task))
155#  define KSTK_ESP(task)	(task_sp(task))
156
157/* FIXME */
158#  define deactivate_mm(tsk, mm)	do { } while (0)
159
160#  define STACK_TOP	TASK_SIZE
161#  define STACK_TOP_MAX	STACK_TOP
162
163#ifdef CONFIG_DEBUG_FS
164extern struct dentry *of_debugfs_root;
165#endif
166
167#  endif /* __ASSEMBLY__ */
168# endif /* CONFIG_MMU */
169#endif /* _ASM_MICROBLAZE_PROCESSOR_H */