forked from Imagelibrary/rtems
7486c65fdb
* shared/bspstart.c: Moved most of the remaining CPU Table fields to the Configuration Table. This included pretasking_hook, predriver_hook, postdriver_hook, idle_task, do_zero_of_workspace, extra_mpci_receive_server_stack, stack_allocate_hook, and stack_free_hook. As a side-effect of this effort some multiprocessing code was made conditional and some style clean up occurred.
142 lines
3.3 KiB
C
142 lines
3.3 KiB
C
/*
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* This set of routines starts the application. It includes application,
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* board, and monitor specific initialization and configuration.
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* The generic CPU dependent initialization has been performed
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* before any of these are invoked.
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*
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* COPYRIGHT (c) 1989-2006.
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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.com/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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* $Id$
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*/
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/* must be identical to STACK_SIZE in start.S */
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#define STACK_SIZE 16 * 1024
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#include <string.h>
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#include <bsp.h>
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#include <rtems/libio.h>
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#include <rtems/libcsupport.h>
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#include <rtems/bspIo.h>
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/*
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* The original table from the application and our copy of it with
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* some changes.
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*/
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extern rtems_configuration_table Configuration;
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rtems_configuration_table BSP_Configuration;
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rtems_cpu_table Cpu_table;
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/*
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* Tells us where to put the workspace in case remote debugger is present.
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*/
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extern uint32_t rdb_start;
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#ifdef LEON2
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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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#endif
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/*
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* Use the shared implementations of the following routines
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*/
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void bsp_postdriver_hook(void);
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void bsp_libc_init( void *, uint32_t, int );
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extern void bsp_spurious_initialize();
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#ifdef LEON2
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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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*/
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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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#endif
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/*
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* bsp_pretasking_hook
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*
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* BSP pretasking hook. Called just before drivers are initialized.
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* Used to setup libc and install any BSP extensions.
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*/
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void bsp_pretasking_hook(void)
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{
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extern int end;
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uint32_t heap_start;
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uint32_t heap_size;
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heap_start = (uint32_t) &end;
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if (heap_start & (CPU_ALIGNMENT-1))
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heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
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heap_size = BSP_Configuration.work_space_start - (void *)&end - STACK_SIZE;
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heap_size &= 0xfffffff0; /* keep it as a multiple of 16 bytes */
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bsp_libc_init((void *) heap_start, heap_size, 0);
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#ifdef RTEMS_DEBUG
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rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
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#endif
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bsp_spurious_initialize();
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}
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/*
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* bsp_start
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*
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* This routine does the bulk of the system initialization.
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*/
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void bsp_start( void )
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{
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unsigned char *work_space_start;
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/*
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* This should be enough interrupt stack.
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*/
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Cpu_table.interrupt_stack_size = CONFIGURE_INTERRUPT_STACK_MEMORY;
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work_space_start =
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(unsigned char *)rdb_start - BSP_Configuration.work_space_size;
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if ( work_space_start <= (unsigned char *)&end ) {
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printk( "bspstart: Not enough RAM!!!\n" );
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BSP_fatal_return();
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}
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BSP_Configuration.work_space_start = work_space_start;
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#ifdef LEON2
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CPU_SPARC_HAS_SNOOPING = set_snooping();
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#endif
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}
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