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    1: /*
    2:  *----------------------------------------------------------------------
    3:  *    T2EX Software Package
    4:  *
    5:  *    Copyright 2012 by Ken Sakamura.
    6:  *    This software is distributed under the latest version of T-License 2.x.
    7:  *----------------------------------------------------------------------
    8:  *
    9:  *    Released by T-Engine Forum(http://www.t-engine.org/) at 2012/12/12.
   10:  *    Modified by TRON Forum(http://www.tron.org/) at 2015/06/04.
   11:  *
   12:  *----------------------------------------------------------------------
   13:  */
   14: /*
   15:  * This software package is available for use, modification, 
   16:  * and redistribution in accordance with the terms of the attached 
   17:  * T-License 2.x.
   18:  * If you want to redistribute the source code, you need to attach 
   19:  * the T-License 2.x document.
   20:  * There's no obligation to publish the content, and no obligation 
   21:  * to disclose it to the TRON Forum if you have modified the 
   22:  * software package.
   23:  * You can also distribute the modified source code. In this case, 
   24:  * please register the modification to T-Kernel traceability service.
   25:  * People can know the history of modifications by the service, 
   26:  * and can be sure that the version you have inherited some 
   27:  * modification of a particular version or not.
   28:  *
   29:  *    http://trace.tron.org/tk/?lang=en
   30:  *    http://trace.tron.org/tk/?lang=ja
   31:  *
   32:  * As per the provisions of the T-License 2.x, TRON Forum ensures that 
   33:  * the portion of the software that is copyrighted by Ken Sakamura or 
   34:  * the TRON Forum does not infringe the copyrights of a third party.
   35:  * However, it does not make any warranty other than this.
   36:  * DISCLAIMER: TRON Forum and Ken Sakamura shall not be held
   37:  * responsible for any consequences or damages caused directly or
   38:  * indirectly by the use of this software package.
   39:  *
   40:  * The source codes in bsd_source.tar.gz in this software package are 
   41:  * derived from NetBSD or OpenBSD and not covered under T-License 2.x.
   42:  * They need to be changed or redistributed according to the 
   43:  * representation of each source header.
   44:  */
   45: 
   46: /*
   47:  *      @(#)atomic_common.h (sys)
   48:  *
   49:  *      Atomic integer operations
   50:  */
   51: 
   52: #ifndef __SYS_ATOMIC_COMMON_H__
   53: #define __SYS_ATOMIC_COMMON_H__
   54: 
   55: #include <basic.h>
   56: #include <tk/syslib.h>
   57: 
   58: #if TEF_EM1D
   59: #  include <sys/sysdepend/tef_em1d/atomic_depend.h>
   60: #endif
   61: 
   62: /*
   63:  * From here, generic implementations of atomic integer operations 
   64:  * are defined. Each of these definitions is used only when 
   65:  * ATOMIC_xxx_USER_MODE remains undefined at this point.
   66:  *
   67:  * The value of ATOMIC_xxx_USER_MODE shall be defined as follows:
   68:  *      0: atomic_xxx implementation cannot be used in user mode
   69:  *      1: atomic_xxx implementation can be used in user mode
   70:  */
   71: 
   72: #ifndef ATOMIC_INC_USER_MODE
   73: #define ATOMIC_INC_USER_MODE 0
   74: Inline UINT atomic_inc(volatile UINT* addr)
   75: {
   76:         UINT imask;
   77:         UINT re;
   78:         DI(imask);
   79:         re = ++*addr;
   80:         EI(imask);
   81:         return re;
   82: }
   83: #endif /* ATOMIC_INC_USER_MODE */
   84: 
   85: #ifndef ATOMIC_DEC_USER_MODE
   86: #define ATOMIC_DEC_USER_MODE 0
   87: Inline UINT atomic_dec(volatile UINT* addr)
   88: {
   89:         UINT imask;
   90:         UINT re;
   91:         DI(imask);
   92:         re = --*addr;
   93:         EI(imask);
   94:         return re;
   95: }
   96: #endif /* ATOMIC_DEC_USER_MODE */
   97: 
   98: #ifndef ATOMIC_ADD_USER_MODE
   99: #define ATOMIC_ADD_USER_MODE 0
  100: Inline UINT atomic_add(volatile UINT* addr, UINT val)
  101: {
  102:         UINT imask;
  103:         UINT re;
  104:         DI(imask);
  105:         *addr += val;
  106:         re = *addr;
  107:         EI(imask);
  108:         return re;
  109: }
  110: #endif /* ATOMIC_ADD_USER_MODE */
  111: 
  112: #ifndef ATOMIC_SUB_USER_MODE
  113: #define ATOMIC_SUB_USER_MODE 0
  114: Inline UINT atomic_sub(volatile UINT* addr, UINT val)
  115: {
  116:         UINT imask;
  117:         UINT re;
  118:         DI(imask);
  119:         *addr -= val;
  120:         re = *addr;
  121:         EI(imask);
  122:         return re;
  123: }
  124: #endif /* ATOMIC_SUB_USER_MODE */
  125: 
  126: /* TAS: test-and-set */
  127: #ifndef ATOMIC_XCHG_USER_MODE
  128: #define ATOMIC_XCHG_USER_MODE 0
  129: Inline UINT atomic_xchg(volatile UINT* addr, UINT val)
  130: {
  131:         UINT imask;
  132:         UINT re;
  133:         DI(imask);
  134:         re = *addr;
  135:         *addr = val;
  136:         EI(imask);
  137:         return re;
  138: }
  139: #endif /* ATOMIC_XCHG_USER_MODE */
  140: 
  141: /* CAS: compare-and-swap */
  142: #ifndef ATOMIC_CMPXCHG_USER_MODE
  143: #define ATOMIC_CMPXCHG_USER_MODE 0
  144: Inline UINT atomic_cmpxchg(volatile UINT* addr, UINT val, UINT cmp)
  145: {
  146:         UINT imask;
  147:         UINT re;
  148:         DI(imask);
  149:         re = *addr;
  150:         if ( *addr == cmp ) {
  151:                 *addr = val;
  152:         }
  153:         EI(imask);
  154:         return re;
  155: }
  156: #endif /* ATOMIC_CMPXCHG_USER_MODE */
  157: 
  158: #ifndef ATOMIC_BITSET_USER_MODE
  159: #define ATOMIC_BITSET_USER_MODE 0
  160: Inline UINT atomic_bitset(volatile UINT* addr, UINT setptn)
  161: {
  162:         UINT imask;
  163:         UINT re;
  164:         DI(imask);
  165:         re = *addr;
  166:         *addr |= setptn;
  167:         EI(imask);
  168:         return re;
  169: }
  170: #endif /* ATOMIC_BITSET_USER_MODE */
  171: 
  172: #ifndef ATOMIC_BITCLR_USER_MODE
  173: #define ATOMIC_BITCLR_USER_MODE 0
  174: Inline UINT atomic_bitclr(volatile UINT* addr, UINT clrptn)
  175: {
  176:         UINT imask;
  177:         UINT re;
  178:         DI(imask);
  179:         re = *addr;
  180:         *addr &= clrptn;
  181:         EI(imask);
  182:         return re;
  183: }
  184: #endif /* ATOMIC_BITCLR_USER_MODE */
  185: 
  186: #endif /* __SYS_ATOMIC_COMMON_H__ */