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/**
* @file
* @ingroup sparc_leon2
* @brief LEON2 Cache Snooping Support
*/
/*
* LEON2 Cache Snooping Support
*
*
* COPYRIGHT (c) 1989-2009.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*
* Ported to ERC32 implementation of the SPARC by On-Line Applications
* Research Corporation (OAR) under contract to the European Space
* Agency (ESA).
*
* ERC32 modifications of respective RTEMS file: COPYRIGHT (c) 1995.
* European Space Agency.
*/
#include <bsp.h>
#include <bsp/bootcard.h>
/*
* Tells us if data cache snooping is available
*/
int CPU_SPARC_HAS_SNOOPING;
/*
* set_snooping
*
* Read the data cache configuration register to determine if
* bus snooping is available. This is needed for some drivers so
* that they can select the most efficient copy routines.
*/
static inline int set_snooping(void)
{
unsigned int tmp = *(unsigned int *)0x80000014; /* Cache control register */
return ((tmp>>23) & 1); /* Data cache snooping enabled */
}
void bsp_start( void )
{
CPU_SPARC_HAS_SNOOPING = set_snooping();
}
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