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   1 #ifndef __ASM_SH_SYSTEM_64_H
   2 #define __ASM_SH_SYSTEM_64_H
   3
   4 /*
   5  * include/asm-sh/system_64.h
   6  *
   7  * Copyright (C) 2000, 2001  Paolo Alberelli
   8  * Copyright (C) 2003  Paul Mundt
   9  * Copyright (C) 2004  Richard Curnow
  10  *
  11  * This file is subject to the terms and conditions of the GNU General Public
  12  * License.  See the file "COPYING" in the main directory of this archive
  13  * for more details.
  14  */
  15 #include <cpu/registers.h>
  16 #include <asm/processor.h>
  17
  18 /*
  19  *      switch_to() should switch tasks to task nr n, first
  20  */
  21 struct task_struct *sh64_switch_to(struct task_struct *prev,
  22                                    struct thread_struct *prev_thread,
  23                                    struct task_struct *next,
  24                                    struct thread_struct *next_thread);
  25
  26 #define switch_to(prev,next,last)                               \
  27 do {                                                            \
  28         if (last_task_used_math != next) {                      \
  29                 struct pt_regs *regs = next->thread.uregs;      \
  30                 if (regs) regs->sr |= SR_FD;                    \
  31         }                                                       \
  32         last = sh64_switch_to(prev, &prev->thread, next,        \
  33                               &next->thread);                   \
  34 } while (0)
  35
  36 #define __uses_jump_to_uncached
  37
  38 #define jump_to_uncached()      do { } while (0)
  39 #define back_to_cached()        do { } while (0)
  40
  41 #define __icbi(addr)    __asm__ __volatile__ ( "icbi %0, 0\n\t" : : "r" (addr))
  42 #define __ocbp(addr)    __asm__ __volatile__ ( "ocbp %0, 0\n\t" : : "r" (addr))
  43 #define __ocbi(addr)    __asm__ __volatile__ ( "ocbi %0, 0\n\t" : : "r" (addr))
  44 #define __ocbwb(addr)   __asm__ __volatile__ ( "ocbwb %0, 0\n\t" : : "r" (addr))
  45
  46 static inline reg_size_t register_align(void *val)
  47 {
  48         return (unsigned long long)(signed long long)(signed long)val;
  49 }
  50
  51 #define SR_BL_LL        0x0000000010000000LL
  52
  53 static inline void set_bl_bit(void)
  54 {
  55         unsigned long long __dummy0, __dummy1 = SR_BL_LL;
  56
  57         __asm__ __volatile__("getcon    " __SR ", %0\n\t"
  58                              "or        %0, %1, %0\n\t"
  59                              "putcon    %0, " __SR "\n\t"
  60                              : "=&r" (__dummy0)
  61                              : "r" (__dummy1));
  62
  63 }
  64
  65 static inline void clear_bl_bit(void)
  66 {
  67         unsigned long long __dummy0, __dummy1 = ~SR_BL_LL;
  68
  69         __asm__ __volatile__("getcon    " __SR ", %0\n\t"
  70                              "and       %0, %1, %0\n\t"
  71                              "putcon    %0, " __SR "\n\t"
  72                              : "=&r" (__dummy0)
  73                              : "r" (__dummy1));
  74 }
  75
  76 #endif /* __ASM_SH_SYSTEM_64_H */