Eric Lee / smarc-uboot

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cmd/cache.c 2 KB
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d41ce506b   Eric Lee   Initial Release, ... 
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  /*
   * (C) Copyright 2000
   * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   *
   * SPDX-License-Identifier:	GPL-2.0+
   */
  
  /*
   * Cache support: switch on or off, get status
   */
  #include <common.h>
  #include <command.h>
  #include <linux/compiler.h>
  
  static int parse_argv(const char *);
  
  void __weak invalidate_icache_all(void)
  {
  	/* please define arch specific invalidate_icache_all */
  	puts("No arch specific invalidate_icache_all available!
  ");
  }
  
  static int do_icache(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  {
  	switch (argc) {
  	case 2:			/* on / off	*/
  		switch (parse_argv(argv[1])) {
  		case 0:
  			icache_disable();
  			break;
  		case 1:
  			icache_enable();
  			break;
  		case 2:
  			invalidate_icache_all();
  			break;
  		}
  		break;
  	case 1:			/* get status */
  		printf("Instruction Cache is %s
  ",
  			icache_status() ? "ON" : "OFF");
  		return 0;
  	default:
  		return CMD_RET_USAGE;
  	}
  	return 0;
  }
  
  void __weak flush_dcache_all(void)
  {
  	puts("No arch specific flush_dcache_all available!
  ");
  	/* please define arch specific flush_dcache_all */
  }
  
  static int do_dcache(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  {
  	switch (argc) {
  	case 2:			/* on / off */
  		switch (parse_argv(argv[1])) {
  		case 0:
  			dcache_disable();
  			break;
  		case 1:
  			dcache_enable();
  			break;
  		case 2:
  			flush_dcache_all();
  			break;
  		}
  		break;
  	case 1:			/* get status */
  		printf("Data (writethrough) Cache is %s
  ",
  			dcache_status() ? "ON" : "OFF");
  		return 0;
  	default:
  		return CMD_RET_USAGE;
  	}
  	return 0;
  }
  
  static int parse_argv(const char *s)
  {
  	if (strcmp(s, "flush") == 0)
  		return 2;
  	else if (strcmp(s, "on") == 0)
  		return 1;
  	else if (strcmp(s, "off") == 0)
  		return 0;
  
  	return -1;
  }
  
  
  U_BOOT_CMD(
  	icache,   2,   1,     do_icache,
  	"enable or disable instruction cache",
  	"[on, off, flush]
  "
  	"    - enable, disable, or flush instruction cache"
  );
  
  U_BOOT_CMD(
  	dcache,   2,   1,     do_dcache,
  	"enable or disable data cache",
  	"[on, off, flush]
  "
  	"    - enable, disable, or flush data (writethrough) cache"
  );