forked from Imagelibrary/rtems
128 lines
3.2 KiB
C
128 lines
3.2 KiB
C
/**
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* @file
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* @ingroup RTEMSBSPsSPARCLEON2
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* @brief LEON2 Cache Snooping Support
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*/
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/*
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* LEON2 Cache Snooping Support
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*
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* COPYRIGHT (c) 2011
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* Aeroflex Gaisler
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*
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* COPYRIGHT (c) 1989-2009.
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* On-Line Applications Research Corporation (OAR).
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*
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* Ported to ERC32 implementation of the SPARC by On-Line Applications
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* Research Corporation (OAR) under contract to the European Space
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* Agency (ESA).
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*
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* ERC32 modifications of respective RTEMS file: COPYRIGHT (c) 1995.
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* European Space Agency.
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*/
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#include <bsp.h>
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#include <bsp/bootcard.h>
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#include <rtems/sysinit.h>
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/*
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* Tells us if data cache snooping is available
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*/
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int CPU_SPARC_HAS_SNOOPING;
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/*
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* set_snooping
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*
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* Read the data cache configuration register to determine if
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* bus snooping is available. This is needed for some drivers so
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* that they can select the most efficient copy routines.
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*/
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static inline int set_snooping(void)
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{
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unsigned int tmp = *(unsigned int *)0x80000014; /* Cache control register */
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return ((tmp>>23) & 1); /* Data cache snooping enabled */
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}
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void bsp_start( void )
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{
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CPU_SPARC_HAS_SNOOPING = set_snooping();
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}
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/* If RTEMS_DRVMGR_STARTUP is defined extra code is added that
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* registers the LEON2 AMBA bus driver as root driver into the
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* driver manager.
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*
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* The structues here are declared weak so that the user can override
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* the configuration and add custom cores in the RTEMS project.
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*/
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#ifdef RTEMS_DRVMGR_STARTUP
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#include <drvmgr/drvmgr.h>
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#include <drvmgr/leon2_amba_bus.h>
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/* All drivers included by BSP, this is overridden by the user by including
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* the devmgr_confdefs.h. No specifc drivers needed by BSP since IRQ/TIMER/UART
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* is not drvmgr drivers.
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*/
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drvmgr_drv_reg_func drvmgr_drivers[] __attribute__((weak)) =
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{
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NULL /* End array with NULL */
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};
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/* Defines what cores are avilable on the bus in addition to the standard
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* LEON2 peripherals.
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*/
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struct leon2_core leon2_amba_custom_cores[] __attribute__((weak)) =
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{
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EMPTY_LEON2_CORE
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};
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/* Configure LEON2 Root bus driver */
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struct leon2_bus leon2_bus_config __attribute__((weak)) =
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{
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&leon2_std_cores[0], /* The standard cores, defined by driver */
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&leon2_amba_custom_cores[0], /* custom cores, defined by us */
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DRVMGR_TRANSLATE_ONE2ONE,
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DRVMGR_TRANSLATE_ONE2ONE,
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};
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/* Driver resources on LEON2 AMBA bus. Used to set options for particular
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* LEON2 cores, it is up to the driver to look at the configuration paramters
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* once started.
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*/
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struct drvmgr_bus_res leon2_amba_res __attribute__((weak)) =
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{
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.next = NULL,
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.resource = {
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DRVMGR_RES_EMPTY
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},
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};
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#endif /* RTEMS_DRVMGR_STARTUP */
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/*
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* Called just before drivers are initialized. Is used to initialize shared
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* interrupt handling.
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*/
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static void leon2_pre_driver_hook( void )
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{
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bsp_spurious_initialize();
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/* Initialize shared interrupt handling, must be done after IRQ
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* controller has been found and initialized.
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*/
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BSP_shared_interrupt_init();
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#ifdef RTEMS_DRVMGR_STARTUP
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leon2_root_register(&leon2_bus_config, &leon2_amba_res);
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#endif
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}
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RTEMS_SYSINIT_ITEM(
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leon2_pre_driver_hook,
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RTEMS_SYSINIT_BSP_PRE_DRIVERS,
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RTEMS_SYSINIT_ORDER_MIDDLE
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);
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