~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/arch/mn10300/include/asm/processor.h

Version: ~ [ linux-5.2-rc1 ] ~ [ linux-5.1.2 ] ~ [ linux-5.0.16 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.43 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.119 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.176 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.179 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.139 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.67 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.39.4 ] ~ [ linux-2.6.38.8 ] ~ [ linux-2.6.37.6 ] ~ [ linux-2.6.36.4 ] ~ [ linux-2.6.35.14 ] ~ [ linux-2.6.34.15 ] ~ [ linux-2.6.33.20 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /* MN10300 Processor specifics
  2  *
  3  * Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd.
  4  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
  5  * Written by David Howells (dhowells@redhat.com)
  6  *
  7  * This program is free software; you can redistribute it and/or
  8  * modify it under the terms of the GNU General Public Licence
  9  * as published by the Free Software Foundation; either version
 10  * 2 of the Licence, or (at your option) any later version.
 11  */
 12 
 13 #ifndef _ASM_PROCESSOR_H
 14 #define _ASM_PROCESSOR_H
 15 
 16 #include <linux/threads.h>
 17 #include <linux/thread_info.h>
 18 #include <asm/page.h>
 19 #include <asm/ptrace.h>
 20 #include <asm/cpu-regs.h>
 21 #include <asm/uaccess.h>
 22 #include <asm/current.h>
 23 
 24 /* Forward declaration, a strange C thing */
 25 struct task_struct;
 26 struct mm_struct;
 27 
 28 /*
 29  * Default implementation of macro that returns current
 30  * instruction pointer ("program counter").
 31  */
 32 #define current_text_addr()                     \
 33 ({                                              \
 34         void *__pc;                             \
 35         asm("mov pc,%0" : "=a"(__pc));          \
 36         __pc;                                   \
 37 })
 38 
 39 extern void get_mem_info(unsigned long *mem_base, unsigned long *mem_size);
 40 
 41 extern void show_registers(struct pt_regs *regs);
 42 
 43 /*
 44  *  CPU type and hardware bug flags. Kept separately for each CPU.
 45  *  Members of this structure are referenced in head.S, so think twice
 46  *  before touching them. [mj]
 47  */
 48 
 49 struct mn10300_cpuinfo {
 50         int             type;
 51         unsigned long   loops_per_jiffy;
 52         char            hard_math;
 53 };
 54 
 55 extern struct mn10300_cpuinfo boot_cpu_data;
 56 
 57 #ifdef CONFIG_SMP
 58 #if CONFIG_NR_CPUS < 2 || CONFIG_NR_CPUS > 8
 59 # error Sorry, NR_CPUS should be 2 to 8
 60 #endif
 61 extern struct mn10300_cpuinfo cpu_data[];
 62 #define current_cpu_data cpu_data[smp_processor_id()]
 63 #else  /* CONFIG_SMP */
 64 #define cpu_data &boot_cpu_data
 65 #define current_cpu_data boot_cpu_data
 66 #endif /* CONFIG_SMP */
 67 
 68 extern void identify_cpu(struct mn10300_cpuinfo *);
 69 extern void print_cpu_info(struct mn10300_cpuinfo *);
 70 extern void dodgy_tsc(void);
 71 #define cpu_relax() barrier()
 72 
 73 /*
 74  * User space process size: 1.75GB (default).
 75  */
 76 #define TASK_SIZE               0x70000000
 77 
 78 /*
 79  * Where to put the userspace stack by default
 80  */
 81 #define STACK_TOP               0x70000000
 82 #define STACK_TOP_MAX           STACK_TOP
 83 
 84 /* This decides where the kernel will search for a free chunk of vm
 85  * space during mmap's.
 86  */
 87 #define TASK_UNMAPPED_BASE      0x30000000
 88 
 89 struct fpu_state_struct {
 90         unsigned long   fs[32];         /* fpu registers */
 91         unsigned long   fpcr;           /* fpu control register */
 92 };
 93 
 94 struct thread_struct {
 95         struct pt_regs          *uregs;         /* userspace register frame */
 96         unsigned long           pc;             /* kernel PC */
 97         unsigned long           sp;             /* kernel SP */
 98         unsigned long           a3;             /* kernel FP */
 99         unsigned long           wchan;
100         unsigned long           usp;
101         unsigned long           fpu_flags;
102 #define THREAD_USING_FPU        0x00000001      /* T if this task is using the FPU */
103 #define THREAD_HAS_FPU          0x00000002      /* T if this task owns the FPU right now */
104         struct fpu_state_struct fpu_state;
105 };
106 
107 #define INIT_THREAD             \
108 {                               \
109         .uregs  = init_uregs,   \
110         .pc     = 0,            \
111         .sp     = 0,            \
112         .a3     = 0,            \
113         .wchan  = 0,            \
114 }
115 
116 #define INIT_MMAP \
117 { &init_mm, 0, 0, NULL, PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC, 1, \
118   NULL, NULL }
119 
120 /*
121  * do necessary setup to start up a newly executed thread
122  * - need to discard the frame stacked by the kernel thread invoking the execve
123  *   syscall (see RESTORE_ALL macro)
124  */
125 static inline void start_thread(struct pt_regs *regs,
126                                 unsigned long new_pc, unsigned long new_sp)
127 {
128         struct thread_info *ti = current_thread_info();
129         struct pt_regs *frame0;
130         set_fs(USER_DS);
131 
132         frame0 = thread_info_to_uregs(ti);
133         frame0->epsw = EPSW_nSL | EPSW_IE | EPSW_IM;
134         frame0->pc = new_pc;
135         frame0->sp = new_sp;
136         ti->frame = frame0;
137 }
138 
139 
140 /* Free all resources held by a thread. */
141 extern void release_thread(struct task_struct *);
142 
143 /* Prepare to copy thread state - unlazy all lazy status */
144 extern void prepare_to_copy(struct task_struct *tsk);
145 
146 /*
147  * create a kernel thread without removing it from tasklists
148  */
149 extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
150 
151 /*
152  * Return saved PC of a blocked thread.
153  */
154 extern unsigned long thread_saved_pc(struct task_struct *tsk);
155 
156 unsigned long get_wchan(struct task_struct *p);
157 
158 #define task_pt_regs(task) ((task)->thread.uregs)
159 #define KSTK_EIP(task) (task_pt_regs(task)->pc)
160 #define KSTK_ESP(task) (task_pt_regs(task)->sp)
161 
162 #define KSTK_TOP(info)                          \
163 ({                                              \
164         (unsigned long)(info) + THREAD_SIZE;    \
165 })
166 
167 #define ARCH_HAS_PREFETCH
168 #define ARCH_HAS_PREFETCHW
169 
170 static inline void prefetch(const void *x)
171 {
172 #ifdef CONFIG_MN10300_CACHE_ENABLED
173 #ifdef CONFIG_MN10300_PROC_MN103E010
174         asm volatile ("nop; nop; dcpf (%0)" : : "r"(x));
175 #else
176         asm volatile ("dcpf (%0)" : : "r"(x));
177 #endif
178 #endif
179 }
180 
181 static inline void prefetchw(const void *x)
182 {
183 #ifdef CONFIG_MN10300_CACHE_ENABLED
184 #ifdef CONFIG_MN10300_PROC_MN103E010
185         asm volatile ("nop; nop; dcpf (%0)" : : "r"(x));
186 #else
187         asm volatile ("dcpf (%0)" : : "r"(x));
188 #endif
189 #endif
190 }
191 
192 #endif /* _ASM_PROCESSOR_H */
193 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp