arch/m68k/include/asm/cacheflush_no.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _M68KNOMMU_CACHEFLUSH_H
   3 #define _M68KNOMMU_CACHEFLUSH_H
   4
   5 /*
   6  * (C) Copyright 2000-2010, Greg Ungerer <gerg@snapgear.com>
   7  */
   8 #include <linux/mm.h>
   9 #include <asm/mcfsim.h>
  10
  11 #define flush_cache_all()                       __flush_cache_all()
  12 #define flush_dcache_range(start, len)          __flush_dcache_all()
  13 #define flush_icache_range(start, len)          __flush_icache_all()
  14
  15 void mcf_cache_push(void);
  16
  17 static inline void __clear_cache_all(void)
  18 {
  19 #ifdef CACHE_INVALIDATE
  20         __asm__ __volatile__ (
  21                 "movec  %0, %%CACR\n\t"
  22                 "nop\n\t"
  23                 : : "r" (CACHE_INVALIDATE) );
  24 #endif
  25 }
  26
  27 static inline void __flush_cache_all(void)
  28 {
  29 #ifdef CACHE_PUSH
  30         mcf_cache_push();
  31 #endif
  32         __clear_cache_all();
  33 }
  34
  35 /*
  36  * Some ColdFire parts implement separate instruction and data caches,
  37  * on those we should just flush the appropriate cache. If we don't need
  38  * to do any specific flushing then this will be optimized away.
  39  */
  40 static inline void __flush_icache_all(void)
  41 {
  42 #ifdef CACHE_INVALIDATEI
  43         __asm__ __volatile__ (
  44                 "movec  %0, %%CACR\n\t"
  45                 "nop\n\t"
  46                 : : "r" (CACHE_INVALIDATEI) );
  47 #endif
  48 }
  49
  50 static inline void __flush_dcache_all(void)
  51 {
  52 #ifdef CACHE_PUSH
  53         mcf_cache_push();
  54 #endif
  55 #ifdef CACHE_INVALIDATED
  56         __asm__ __volatile__ (
  57                 "movec  %0, %%CACR\n\t"
  58                 "nop\n\t"
  59                 : : "r" (CACHE_INVALIDATED) );
  60 #else
  61         /* Flush the write buffer */
  62         __asm__ __volatile__ ( "nop" );
  63 #endif
  64 }
  65
  66 /*
  67  * Push cache entries at supplied address. We want to write back any dirty
  68  * data and then invalidate the cache lines associated with this address.
  69  */
  70 static inline void cache_push(unsigned long paddr, int len)
  71 {
  72         __flush_cache_all();
  73 }
  74
  75 /*
  76  * Clear cache entries at supplied address (that is don't write back any
  77  * dirty data).
  78  */
  79 static inline void cache_clear(unsigned long paddr, int len)
  80 {
  81         __clear_cache_all();
  82 }
  83
  84 #include <asm-generic/cacheflush.h>
  85
  86 #endif /* _M68KNOMMU_CACHEFLUSH_H */