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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
* @ingroup RTEMSBSPsSPARCLEON2
* @brief LEON2 Cache Snooping Support
*/
/*
* LEON2 Cache Snooping Support
*
* COPYRIGHT (c) 2011
* Aeroflex Gaisler
*
* COPYRIGHT (c) 1989-2009.
* On-Line Applications Research Corporation (OAR).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* 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>
#include <bsp/irq-generic.h>
#include <rtems/sysinit.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();
}
/* If RTEMS_DRVMGR_STARTUP is defined extra code is added that
* registers the LEON2 AMBA bus driver as root driver into the
* driver manager.
*
* The structues here are declared weak so that the user can override
* the configuration and add custom cores in the RTEMS project.
*/
#ifdef RTEMS_DRVMGR_STARTUP
#include <drvmgr/drvmgr.h>
#include <drvmgr/leon2_amba_bus.h>
/* All drivers included by BSP, this is overridden by the user by including
* the devmgr_confdefs.h. No specifc drivers needed by BSP since IRQ/TIMER/UART
* is not drvmgr drivers.
*/
drvmgr_drv_reg_func drvmgr_drivers[] __attribute__((weak)) =
{
NULL /* End array with NULL */
};
/* Defines what cores are avilable on the bus in addition to the standard
* LEON2 peripherals.
*/
struct leon2_core leon2_amba_custom_cores[] __attribute__((weak)) =
{
EMPTY_LEON2_CORE
};
/* Configure LEON2 Root bus driver */
struct leon2_bus leon2_bus_config __attribute__((weak)) =
{
&leon2_std_cores[0], /* The standard cores, defined by driver */
&leon2_amba_custom_cores[0], /* custom cores, defined by us */
DRVMGR_TRANSLATE_ONE2ONE,
DRVMGR_TRANSLATE_ONE2ONE,
};
/* Driver resources on LEON2 AMBA bus. Used to set options for particular
* LEON2 cores, it is up to the driver to look at the configuration paramters
* once started.
*/
struct drvmgr_bus_res leon2_amba_res __attribute__((weak)) =
{
.next = NULL,
.resource = {
DRVMGR_RES_EMPTY
},
};
#endif /* RTEMS_DRVMGR_STARTUP */
/*
* Called just before drivers are initialized. Is used to initialize shared
* interrupt handling.
*/
static void leon2_pre_driver_hook( void )
{
/* Initialize shared interrupt handling, must be done after IRQ
* controller has been found and initialized.
*/
bsp_interrupt_initialize();
#ifdef RTEMS_DRVMGR_STARTUP
leon2_root_register(&leon2_bus_config, &leon2_amba_res);
#endif
}
RTEMS_SYSINIT_ITEM(
leon2_pre_driver_hook,
RTEMS_SYSINIT_BSP_PRE_DRIVERS,
RTEMS_SYSINIT_ORDER_MIDDLE
);
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