arch/c6x/include/asm/special_insns.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  *  Port on Texas Instruments TMS320C6x architecture
   4  *
   5  *  Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
   6  *  Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
   7  */
   8 #ifndef _ASM_C6X_SPECIAL_INSNS_H
   9 #define _ASM_C6X_SPECIAL_INSNS_H
  10
  11
  12 #define get_creg(reg) \
  13         ({ unsigned int __x; \
  14            asm volatile ("mvc .s2 " #reg ",%0\n" : "=b"(__x)); __x; })
  15
  16 #define set_creg(reg, v) \
  17         do { unsigned int __x = (unsigned int)(v); \
  18                 asm volatile ("mvc .s2 %0," #reg "\n" : : "b"(__x)); \
  19         } while (0)
  20
  21 #define or_creg(reg, n) \
  22         do { unsigned __x, __n = (unsigned)(n);           \
  23                 asm volatile ("mvc .s2 " #reg ",%0\n"     \
  24                               "or  .l2 %1,%0,%0\n"        \
  25                               "mvc .s2 %0," #reg "\n"     \
  26                               "nop\n"                     \
  27                               : "=&b"(__x) : "b"(__n));   \
  28         } while (0)
  29
  30 #define and_creg(reg, n) \
  31         do { unsigned __x, __n = (unsigned)(n);           \
  32                 asm volatile ("mvc .s2 " #reg ",%0\n"     \
  33                               "and .l2 %1,%0,%0\n"        \
  34                               "mvc .s2 %0," #reg "\n"     \
  35                               "nop\n"    \
  36                               : "=&b"(__x) : "b"(__n));   \
  37         } while (0)
  38
  39 #define get_coreid() (get_creg(DNUM) & 0xff)
  40
  41 /* Set/get IST */
  42 #define set_ist(x)      set_creg(ISTP, x)
  43 #define get_ist()       get_creg(ISTP)
  44
  45 /*
  46  * Exception management
  47  */
  48 #define disable_exception()
  49 #define get_except_type()        get_creg(EFR)
  50 #define ack_exception(type)      set_creg(ECR, 1 << (type))
  51 #define get_iexcept()            get_creg(IERR)
  52 #define set_iexcept(mask)        set_creg(IERR, (mask))
  53
  54 #define _extu(x, s, e)                                                  \
  55         ({      unsigned int __x;                                       \
  56                 asm volatile ("extu .S2 %3,%1,%2,%0\n" :                \
  57                               "=b"(__x) : "n"(s), "n"(e), "b"(x));      \
  58                __x; })
  59
  60 #endif /* _ASM_C6X_SPECIAL_INSNS_H */