/arch/mn10300/include/asm/processor.h

http://github.com/mirrors/linux · C++ Header · 178 lines · 111 code · 30 blank · 37 comment · 1 complexity · dd3bb3e041322ba532b591cf62e29f5e MD5 · raw file

  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. #ifndef _ASM_PROCESSOR_H
  13. #define _ASM_PROCESSOR_H
  14. #include <linux/threads.h>
  15. #include <linux/thread_info.h>
  16. #include <asm/page.h>
  17. #include <asm/ptrace.h>
  18. #include <asm/cpu-regs.h>
  19. #include <asm/uaccess.h>
  20. #include <asm/current.h>
  21. /* Forward declaration, a strange C thing */
  22. struct task_struct;
  23. struct mm_struct;
  24. /*
  25. * Default implementation of macro that returns current
  26. * instruction pointer ("program counter").
  27. */
  28. #define current_text_addr() \
  29. ({ \
  30. void *__pc; \
  31. asm("mov pc,%0" : "=a"(__pc)); \
  32. __pc; \
  33. })
  34. extern void get_mem_info(unsigned long *mem_base, unsigned long *mem_size);
  35. extern void show_registers(struct pt_regs *regs);
  36. /*
  37. * CPU type and hardware bug flags. Kept separately for each CPU.
  38. * Members of this structure are referenced in head.S, so think twice
  39. * before touching them. [mj]
  40. */
  41. struct mn10300_cpuinfo {
  42. int type;
  43. unsigned long loops_per_jiffy;
  44. char hard_math;
  45. };
  46. extern struct mn10300_cpuinfo boot_cpu_data;
  47. #ifdef CONFIG_SMP
  48. #if CONFIG_NR_CPUS < 2 || CONFIG_NR_CPUS > 8
  49. # error Sorry, NR_CPUS should be 2 to 8
  50. #endif
  51. extern struct mn10300_cpuinfo cpu_data[];
  52. #define current_cpu_data cpu_data[smp_processor_id()]
  53. #else /* CONFIG_SMP */
  54. #define cpu_data &boot_cpu_data
  55. #define current_cpu_data boot_cpu_data
  56. #endif /* CONFIG_SMP */
  57. extern void identify_cpu(struct mn10300_cpuinfo *);
  58. extern void print_cpu_info(struct mn10300_cpuinfo *);
  59. extern void dodgy_tsc(void);
  60. #define cpu_relax() barrier()
  61. #define cpu_relax_lowlatency() cpu_relax()
  62. /*
  63. * User space process size: 1.75GB (default).
  64. */
  65. #define TASK_SIZE 0x70000000
  66. /*
  67. * Where to put the userspace stack by default
  68. */
  69. #define STACK_TOP 0x70000000
  70. #define STACK_TOP_MAX STACK_TOP
  71. /* This decides where the kernel will search for a free chunk of vm
  72. * space during mmap's.
  73. */
  74. #define TASK_UNMAPPED_BASE 0x30000000
  75. struct fpu_state_struct {
  76. unsigned long fs[32]; /* fpu registers */
  77. unsigned long fpcr; /* fpu control register */
  78. };
  79. struct thread_struct {
  80. struct pt_regs *uregs; /* userspace register frame */
  81. unsigned long pc; /* kernel PC */
  82. unsigned long sp; /* kernel SP */
  83. unsigned long a3; /* kernel FP */
  84. unsigned long wchan;
  85. unsigned long usp;
  86. unsigned long fpu_flags;
  87. #define THREAD_USING_FPU 0x00000001 /* T if this task is using the FPU */
  88. #define THREAD_HAS_FPU 0x00000002 /* T if this task owns the FPU right now */
  89. struct fpu_state_struct fpu_state;
  90. };
  91. #define INIT_THREAD \
  92. { \
  93. .uregs = init_uregs, \
  94. .pc = 0, \
  95. .sp = 0, \
  96. .a3 = 0, \
  97. .wchan = 0, \
  98. }
  99. #define INIT_MMAP \
  100. { &init_mm, 0, 0, NULL, PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC, 1, \
  101. NULL, NULL }
  102. /*
  103. * do necessary setup to start up a newly executed thread
  104. */
  105. static inline void start_thread(struct pt_regs *regs,
  106. unsigned long new_pc, unsigned long new_sp)
  107. {
  108. regs->epsw = EPSW_nSL | EPSW_IE | EPSW_IM;
  109. regs->pc = new_pc;
  110. regs->sp = new_sp;
  111. }
  112. /* Free all resources held by a thread. */
  113. extern void release_thread(struct task_struct *);
  114. /*
  115. * Return saved PC of a blocked thread.
  116. */
  117. extern unsigned long thread_saved_pc(struct task_struct *tsk);
  118. unsigned long get_wchan(struct task_struct *p);
  119. #define task_pt_regs(task) ((task)->thread.uregs)
  120. #define KSTK_EIP(task) (task_pt_regs(task)->pc)
  121. #define KSTK_ESP(task) (task_pt_regs(task)->sp)
  122. #define KSTK_TOP(info) \
  123. ({ \
  124. (unsigned long)(info) + THREAD_SIZE; \
  125. })
  126. #define ARCH_HAS_PREFETCH
  127. #define ARCH_HAS_PREFETCHW
  128. static inline void prefetch(const void *x)
  129. {
  130. #ifdef CONFIG_MN10300_CACHE_ENABLED
  131. #ifdef CONFIG_MN10300_PROC_MN103E010
  132. asm volatile ("nop; nop; dcpf (%0)" : : "r"(x));
  133. #else
  134. asm volatile ("dcpf (%0)" : : "r"(x));
  135. #endif
  136. #endif
  137. }
  138. static inline void prefetchw(const void *x)
  139. {
  140. #ifdef CONFIG_MN10300_CACHE_ENABLED
  141. #ifdef CONFIG_MN10300_PROC_MN103E010
  142. asm volatile ("nop; nop; dcpf (%0)" : : "r"(x));
  143. #else
  144. asm volatile ("dcpf (%0)" : : "r"(x));
  145. #endif
  146. #endif
  147. }
  148. #endif /* _ASM_PROCESSOR_H */