arch/arm/cpu/pxa/cache.c

   1 /*
   2  * (C) Copyright 2016 Vasily Khoruzhick <anarsoul@gmail.com>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <linux/types.h>
   8 #include <common.h>
   9
  10 #ifndef CONFIG_SYS_DCACHE_OFF
  11 void invalidate_dcache_all(void)
  12 {
  13         /* Flush/Invalidate I cache */
  14         asm volatile("mcr p15, 0, %0, c7, c5, 0\n" : : "r"(0));
  15         /* Flush/Invalidate D cache */
  16         asm volatile("mcr p15, 0, %0, c7, c6, 0\n" : : "r"(0));
  17 }
  18
  19 void flush_dcache_all(void)
  20 {
  21         return invalidate_dcache_all();
  22 }
  23
  24 void invalidate_dcache_range(unsigned long start, unsigned long stop)
  25 {
  26         start &= ~(CONFIG_SYS_CACHELINE_SIZE - 1);
  27         stop &= ~(CONFIG_SYS_CACHELINE_SIZE - 1);
  28
  29         while (start <= stop) {
  30                 asm volatile("mcr p15, 0, %0, c7, c6, 1\n" : : "r"(start));
  31                 start += CONFIG_SYS_CACHELINE_SIZE;
  32         }
  33 }
  34
  35 void flush_dcache_range(unsigned long start, unsigned long stop)
  36 {
  37         return invalidate_dcache_range(start, stop);
  38 }
  39 #else /* #ifndef CONFIG_SYS_DCACHE_OFF */
  40 void invalidate_dcache_all(void)
  41 {
  42 }
  43
  44 void flush_dcache_all(void)
  45 {
  46 }
  47 #endif /* #ifndef CONFIG_SYS_DCACHE_OFF */
  48
  49 /*
  50  * Stub implementations for l2 cache operations
  51  */
  52
  53 __weak void l2_cache_disable(void) {}
  54
  55 #if defined CONFIG_SYS_THUMB_BUILD
  56 __weak void invalidate_l2_cache(void) {}
  57 #endif