arch/sh/include/asm/traps_32.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ASM_SH_TRAPS_32_H
   3 #define __ASM_SH_TRAPS_32_H
   4
   5 #include <linux/types.h>
   6 #include <asm/mmu.h>
   7
   8 #ifdef CONFIG_CPU_HAS_SR_RB
   9 #define lookup_exception_vector()       \
  10 ({                                      \
  11         unsigned long _vec;             \
  12                                         \
  13         __asm__ __volatile__ (          \
  14                 "stc r2_bank, %0\n\t"   \
  15                 : "=r" (_vec)           \
  16         );                              \
  17                                         \
  18         _vec;                           \
  19 })
  20 #else
  21 #define lookup_exception_vector()       \
  22 ({                                      \
  23         unsigned long _vec;             \
  24         __asm__ __volatile__ (          \
  25                 "mov r4, %0\n\t"        \
  26                 : "=r" (_vec)           \
  27         );                              \
  28                                         \
  29         _vec;                           \
  30 })
  31 #endif
  32
  33 static inline void trigger_address_error(void)
  34 {
  35         __asm__ __volatile__ (
  36                 "ldc %0, sr\n\t"
  37                 "mov.l @%1, %0"
  38                 :
  39                 : "r" (0x10000000), "r" (0x80000001)
  40         );
  41 }
  42
  43 asmlinkage void do_address_error(struct pt_regs *regs,
  44                                  unsigned long writeaccess,
  45                                  unsigned long address);
  46 asmlinkage void do_divide_error(unsigned long r4);
  47 asmlinkage void do_reserved_inst(void);
  48 asmlinkage void do_illegal_slot_inst(void);
  49 asmlinkage void do_exception_error(void);
  50
  51 #define BUILD_TRAP_HANDLER(name)                                        \
  52 asmlinkage void name##_trap_handler(unsigned long r4, unsigned long r5, \
  53                                     unsigned long r6, unsigned long r7, \
  54                                     struct pt_regs __regs)
  55
  56 #define TRAP_HANDLER_DECL                               \
  57         struct pt_regs *regs = RELOC_HIDE(&__regs, 0);  \
  58         unsigned int vec = regs->tra;                   \
  59         (void)vec;
  60
  61 #endif /* __ASM_SH_TRAPS_32_H */