arch/xtensa/include/asm/platform.h

   1 /*
   2  * Platform specific functions
   3  *
   4  * This file is subject to the terms and conditions of the GNU General
   5  * Public License.  See the file "COPYING" in the main directory of
   6  * this archive for more details.
   7  *
   8  * Copyright (C) 2001 - 2005 Tensilica Inc.
   9  */
  10
  11 #ifndef _XTENSA_PLATFORM_H
  12 #define _XTENSA_PLATFORM_H
  13
  14 #include <linux/types.h>
  15 #include <asm/bootparam.h>
  16
  17 /*
  18  * platform_init is called before the mmu is initialized to give the
  19  * platform a early hook-up. bp_tag_t is a list of configuration tags
  20  * passed from the boot-loader.
  21  */
  22 extern void platform_init(bp_tag_t*);
  23
  24 /*
  25  * platform_setup is called from setup_arch with a pointer to the command-line
  26  * string.
  27  */
  28 extern void platform_setup (char **);
  29
  30 /*
  31  * platform_restart is called to restart the system.
  32  */
  33 extern void platform_restart (void);
  34
  35 /*
  36  * platform_halt is called to stop the system and halt.
  37  */
  38 extern void platform_halt (void);
  39
  40 /*
  41  * platform_power_off is called to stop the system and power it off.
  42  */
  43 extern void platform_power_off (void);
  44
  45 /*
  46  * platform_idle is called from the idle function.
  47  */
  48 extern void platform_idle (void);
  49
  50 /*
  51  * platform_heartbeat is called every HZ
  52  */
  53 extern void platform_heartbeat (void);
  54
  55 /*
  56  * platform_calibrate_ccount calibrates cpu clock freq (CONFIG_XTENSA_CALIBRATE)
  57  */
  58 extern void platform_calibrate_ccount (void);
  59
  60 /*
  61  * Flush and reset the mmu, simulate a processor reset, and
  62  * jump to the reset vector.
  63  */
  64 void cpu_reset(void) __attribute__((noreturn));
  65
  66 #endif  /* _XTENSA_PLATFORM_H */