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/*
* Platform specific functions
*
* This file is subject to the terms and conditions of the GNU General
* Public License. See the file "COPYING" in the main directory of
* this archive for more details.
*
* Copyright (C) 2001 - 2005 Tensilica Inc.
*/
#ifndef _XTENSA_PLATFORM_H
#define _XTENSA_PLATFORM_H
#include <linux/types.h>
#include <linux/pci.h>
#include <asm/bootparam.h>
/*
* platform_init is called before the mmu is initialized to give the
* platform a early hook-up. bp_tag_t is a list of configuration tags
* passed from the boot-loader.
*/
extern void platform_init(bp_tag_t*);
/*
* platform_setup is called from setup_arch with a pointer to the command-line
* string.
*/
extern void platform_setup (char **);
/*
* platform_restart is called to restart the system.
*/
extern void platform_restart (void);
/*
* platform_halt is called to stop the system and halt.
*/
extern void platform_halt (void);
/*
* platform_power_off is called to stop the system and power it off.
*/
extern void platform_power_off (void);
/*
* platform_idle is called from the idle function.
*/
extern void platform_idle (void);
/*
* platform_heartbeat is called every HZ
*/
extern void platform_heartbeat (void);
/*
* platform_calibrate_ccount calibrates cpu clock freq (CONFIG_XTENSA_CALIBRATE)
*/
extern void platform_calibrate_ccount (void);
/*
* Flush and reset the mmu, simulate a processor reset, and
* jump to the reset vector.
*/
void cpu_reset(void) __attribute__((noreturn));
/*
* Memory caching is platform-dependent in noMMU xtensa configurations.
* The following set of functions should be implemented in platform code
* in order to enable coherent DMA memory operations when CONFIG_MMU is not
* enabled. Default implementations do nothing and issue a warning.
*/
/*
* Check whether p points to a cached memory.
*/
bool platform_vaddr_cached(const void *p);
/*
* Check whether p points to an uncached memory.
*/
bool platform_vaddr_uncached(const void *p);
/*
* Return pointer to an uncached view of the cached sddress p.
*/
void *platform_vaddr_to_uncached(void *p);
/*
* Return pointer to a cached view of the uncached sddress p.
*/
void *platform_vaddr_to_cached(void *p);
#endif /* _XTENSA_PLATFORM_H */
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