arch/m68k/lib/cache.c

   1 /*
   2  * (C) Copyright 2002
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <asm/immap.h>
  10 #include <asm/cache.h>
  11
  12 volatile int *cf_icache_status = (int *)ICACHE_STATUS;
  13 volatile int *cf_dcache_status = (int *)DCACHE_STATUS;
  14
  15 void flush_cache(ulong start_addr, ulong size)
  16 {
  17         /* Must be implemented for all M68k processors with copy-back data cache */
  18 }
  19
  20 int icache_status(void)
  21 {
  22         return *cf_icache_status;
  23 }
  24
  25 int dcache_status(void)
  26 {
  27         return *cf_dcache_status;
  28 }
  29
  30 void icache_enable(void)
  31 {
  32         icache_invalid();
  33
  34         *cf_icache_status = 1;
  35
  36 #ifdef CONFIG_CF_V4
  37         __asm__ __volatile__("movec %0, %%acr2"::"r"(CONFIG_SYS_CACHE_ACR2));
  38         __asm__ __volatile__("movec %0, %%acr3"::"r"(CONFIG_SYS_CACHE_ACR3));
  39 #elif defined(CONFIG_CF_V4e)
  40         __asm__ __volatile__("movec %0, %%acr6"::"r"(CONFIG_SYS_CACHE_ACR6));
  41         __asm__ __volatile__("movec %0, %%acr7"::"r"(CONFIG_SYS_CACHE_ACR7));
  42 #else
  43         __asm__ __volatile__("movec %0, %%acr0"::"r"(CONFIG_SYS_CACHE_ACR0));
  44         __asm__ __volatile__("movec %0, %%acr1"::"r"(CONFIG_SYS_CACHE_ACR1));
  45 #endif
  46
  47         __asm__ __volatile__("movec %0, %%cacr"::"r"(CONFIG_SYS_CACHE_ICACR));
  48 }
  49
  50 void icache_disable(void)
  51 {
  52         u32 temp = 0;
  53
  54         *cf_icache_status = 0;
  55         icache_invalid();
  56
  57 #ifdef CONFIG_CF_V4
  58         __asm__ __volatile__("movec %0, %%acr2"::"r"(temp));
  59         __asm__ __volatile__("movec %0, %%acr3"::"r"(temp));
  60 #elif defined(CONFIG_CF_V4e)
  61         __asm__ __volatile__("movec %0, %%acr6"::"r"(temp));
  62         __asm__ __volatile__("movec %0, %%acr7"::"r"(temp));
  63 #else
  64         __asm__ __volatile__("movec %0, %%acr0"::"r"(temp));
  65         __asm__ __volatile__("movec %0, %%acr1"::"r"(temp));
  66
  67 #endif
  68 }
  69
  70 void icache_invalid(void)
  71 {
  72         u32 temp;
  73
  74         temp = CONFIG_SYS_ICACHE_INV;
  75         if (*cf_icache_status)
  76                 temp |= CONFIG_SYS_CACHE_ICACR;
  77
  78         __asm__ __volatile__("movec %0, %%cacr"::"r"(temp));
  79 }
  80
  81 /*
  82  * data cache only for ColdFire V4 such as MCF547x_8x, MCF5445x
  83  * the dcache will be dummy in ColdFire V2 and V3
  84  */
  85 void dcache_enable(void)
  86 {
  87         dcache_invalid();
  88         *cf_dcache_status = 1;
  89
  90 #ifdef CONFIG_CF_V4
  91         __asm__ __volatile__("movec %0, %%acr0"::"r"(CONFIG_SYS_CACHE_ACR0));
  92         __asm__ __volatile__("movec %0, %%acr1"::"r"(CONFIG_SYS_CACHE_ACR1));
  93 #elif defined(CONFIG_CF_V4e)
  94         __asm__ __volatile__("movec %0, %%acr4"::"r"(CONFIG_SYS_CACHE_ACR4));
  95         __asm__ __volatile__("movec %0, %%acr5"::"r"(CONFIG_SYS_CACHE_ACR5));
  96
  97 #endif
  98
  99         __asm__ __volatile__("movec %0, %%cacr"::"r"(CONFIG_SYS_CACHE_DCACR));
 100 }
 101
 102 void dcache_disable(void)
 103 {
 104         u32 temp = 0;
 105
 106         *cf_dcache_status = 0;
 107         dcache_invalid();
 108
 109         __asm__ __volatile__("movec %0, %%cacr"::"r"(temp));
 110
 111 #ifdef CONFIG_CF_V4
 112         __asm__ __volatile__("movec %0, %%acr0"::"r"(temp));
 113         __asm__ __volatile__("movec %0, %%acr1"::"r"(temp));
 114 #elif defined(CONFIG_CF_V4e)
 115         __asm__ __volatile__("movec %0, %%acr4"::"r"(temp));
 116         __asm__ __volatile__("movec %0, %%acr5"::"r"(temp));
 117
 118 #endif
 119 }
 120
 121 void dcache_invalid(void)
 122 {
 123 #ifdef CONFIG_CF_V4
 124         u32 temp;
 125
 126         temp = CONFIG_SYS_DCACHE_INV;
 127         if (*cf_dcache_status)
 128                 temp |= CONFIG_SYS_CACHE_DCACR;
 129         if (*cf_icache_status)
 130                 temp |= CONFIG_SYS_CACHE_ICACR;
 131
 132         __asm__ __volatile__("movec %0, %%cacr"::"r"(temp));
 133 #endif
 134 }