forked from Imagelibrary/rtems
374 lines
7.9 KiB
C
374 lines
7.9 KiB
C
/* bsp_start()
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*
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* This routine 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 this routine is invoked.
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*
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* Called by RTEMS::RTEMS constructor in startup-ctor.cc
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*
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* INPUT: NONE
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*
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* OUTPUT: NONE
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*
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* COPYRIGHT (c) 1989-1997.
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* On-Line Applications Research Corporation (OAR).
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* Copyright assigned to U.S. Government, 1994.
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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.OARcorp.com/rtems/license.html.
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*
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* $Id$
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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/* for sbrk prototype in linux */
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#if defined(__linux__)
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#define __USE_MISC
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#endif
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#include <unistd.h>
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#include <bsp.h>
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#include <libcsupport.h>
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#include <rtems/libio.h>
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#ifdef STACK_CHECKER_ON
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#include <stackchk.h>
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#endif
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extern rtems_configuration_table Configuration;
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/*
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* A copy of the configuration table from the application
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* with some changes applied to it.
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*/
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rtems_configuration_table BSP_Configuration;
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rtems_multiprocessing_table BSP_Multiprocessing;
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rtems_cpu_table Cpu_table;
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rtems_unsigned32 bsp_isr_level;
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rtems_unsigned32 Heap_size;
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int rtems_argc;
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char **rtems_argv;
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/*
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* May be overridden by RTEMS_WORKSPACE_SIZE and RTEMS_HEAPSPACE_SIZE
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* environment variables; see below.
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*/
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#define DEFAULT_WORKSPACE_SIZE (WORKSPACE_MB * (1024 * 1024))
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#define DEFAULT_HEAPSPACE_SIZE (HEAPSPACE_MB * (1024 * 1024))
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/*
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* Amount to increment itimer by each pass
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* It is a variable instead of a #define to allow the 'looptest'
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* script to bump it without recompiling rtems
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*/
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rtems_unsigned32 CPU_CLICKS_PER_TICK;
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/*
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* Function: bsp_libc_init
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* Created: 94/12/6
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*
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* Description:
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* Initialize whatever libc we are using
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* called from bsp_postdriver_hook
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*
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*
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* Parameters:
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* none
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*
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* Returns:
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* none.
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*
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* Side Effects:
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*
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*
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* Notes:
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*
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* Deficiencies/ToDo:
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*
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*
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*/
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void
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bsp_libc_init(void)
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{
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void *heap_start;
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if (getenv("RTEMS_HEAPSPACE_SIZE"))
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Heap_size = strtol(getenv("RTEMS_HEAPSPACE_SIZE"), 0, 0);
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else
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Heap_size = DEFAULT_HEAPSPACE_SIZE;
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heap_start = 0;
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RTEMS_Malloc_Initialize((void *)heap_start, Heap_size, 1024 * 1024);
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/*
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* Init the RTEMS libio facility to provide UNIX-like system
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* calls for use by newlib (ie: provide __rtems_open, __rtems_close, etc)
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* Uses malloc() to get area for the iops, so must be after malloc init
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*/
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rtems_libio_init();
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libc_init(1);
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}
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/*
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* Function: bsp_pretasking_hook
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* Created: 95/03/10
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*
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* Description:
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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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* Parameters:
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* none
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*
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* Returns:
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* nada
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*
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* Side Effects:
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* installs a few extensions
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*
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* Notes:
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* Must not use libc (to do io) from here, since drivers are
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* not yet initialized.
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*
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* Deficiencies/ToDo:
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*
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*
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*/
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void
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bsp_pretasking_hook(void)
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{
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bsp_libc_init();
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#ifdef STACK_CHECKER_ON
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/*
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* Initialize the stack bounds checker
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* We can either turn it on here or from the app.
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*/
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Stack_check_Initialize();
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#endif
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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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/*
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* Dump malloc stats on exit...
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*/
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#if defined(RTEMS_DEBUG)
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atexit(malloc_dump);
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#endif
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}
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/*
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* After drivers are setup, register some "filenames"
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* and open stdin, stdout, stderr files
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*
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* Newlib will automatically associate the files with these
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* (it hardcodes the numbers)
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*/
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void
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bsp_postdriver_hook(void)
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{
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#if 0
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int stdin_fd, stdout_fd, stderr_fd;
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int error_code;
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error_code = 'S' << 24 | 'T' << 16;
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if ((stdin_fd = __rtems_open("/dev/console", O_RDONLY, 0)) == -1)
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rtems_fatal_error_occurred( error_code | 'D' << 8 | '0' );
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if ((stdout_fd = __rtems_open("/dev/console", O_WRONLY, 0)) == -1)
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rtems_fatal_error_occurred( error_code | 'D' << 8 | '1' );
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if ((stderr_fd = __rtems_open("/dev/console", O_WRONLY, 0)) == -1)
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rtems_fatal_error_occurred( error_code | 'D' << 8 | '2' );
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if ((stdin_fd != 0) || (stdout_fd != 1) || (stderr_fd != 2))
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rtems_fatal_error_occurred( error_code | 'I' << 8 | 'O' );
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#endif
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}
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/*
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* Function: bsp_start
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* Created: 94/12/6
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*
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* Description:
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* called by crt0 as our "main" equivalent
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*
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*
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*
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* Parameters:
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*
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*
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* Returns:
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*
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*
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* Side Effects:
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*
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*
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* Notes:
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*
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*
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* Deficiencies/ToDo:
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*
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*
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*/
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void
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bsp_start(void)
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{
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unsigned32 workspace_ptr;
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/*
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* Copy the table
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*/
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BSP_Configuration = Configuration;
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/*
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* If the node number is -1 then the application better provide
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* it through environment variables RTEMS_NODE.
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* Ditto for RTEMS_MAXIMUM_NODES
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*/
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if (BSP_Configuration.User_multiprocessing_table) {
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char *p;
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/* make a copy for possible editing */
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BSP_Multiprocessing = *BSP_Configuration.User_multiprocessing_table;
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BSP_Configuration.User_multiprocessing_table = &BSP_Multiprocessing;
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if (BSP_Multiprocessing.node == -1)
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{
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p = getenv("RTEMS_NODE");
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BSP_Multiprocessing.node = p ? atoi(p) : 1;
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}
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/* If needed provide maximum_nodes also */
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if (BSP_Multiprocessing.maximum_nodes == -1)
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{
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p = getenv("RTEMS_MAXIMUM_NODES");
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BSP_Multiprocessing.maximum_nodes = p ? atoi(p) : 1;
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}
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}
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/*
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* Set cpu_number to accurately reflect our cpu number
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*/
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if (BSP_Configuration.User_multiprocessing_table)
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cpu_number = BSP_Configuration.User_multiprocessing_table->node - 1;
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else
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cpu_number = 0;
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if (getenv("RTEMS_WORKSPACE_SIZE"))
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BSP_Configuration.work_space_size =
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strtol(getenv("RTEMS_WORKSPACE_SIZE"), 0, 0);
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else
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BSP_Configuration.work_space_size = DEFAULT_WORKSPACE_SIZE;
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/*
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* Allocate workspace memory, ensuring it is properly aligned
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*/
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workspace_ptr =
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(unsigned32) sbrk(BSP_Configuration.work_space_size + CPU_ALIGNMENT);
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workspace_ptr += CPU_ALIGNMENT - 1;
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workspace_ptr &= ~(CPU_ALIGNMENT - 1);
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BSP_Configuration.work_space_start = (void *) workspace_ptr;
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/*
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* Set up our hooks
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* Make sure libc_init is done before drivers init'd so that
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* they can use atexit()
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*/
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Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */
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Cpu_table.predriver_hook = NULL;
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Cpu_table.postdriver_hook = bsp_postdriver_hook;
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Cpu_table.idle_task = NULL; /* do not override system IDLE task */
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/*
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* Don't zero out the workspace since it is in the BSS under UNIX.
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*/
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Cpu_table.do_zero_of_workspace = FALSE;
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/*
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* XXX; interrupt stack not currently used, so this doesn't matter
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*/
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Cpu_table.interrupt_stack_size = (12 * 1024);
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Cpu_table.extra_mpci_receive_server_stack = 0;
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/*
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* Add 1 region for RTEMS Malloc
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*/
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BSP_Configuration.RTEMS_api_configuration->maximum_regions++;
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#ifdef RTEMS_NEWLIB
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/*
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* Add 1 extension for newlib libc
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*/
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BSP_Configuration.maximum_extensions++;
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#endif
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#ifdef STACK_CHECKER_ON
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/*
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* Add 1 extension for stack checker
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*/
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BSP_Configuration.maximum_extensions++;
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#endif
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/*
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* Tell libio how many fd's we want and allow it to tweak config
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*/
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rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS);
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/*
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* Add 1 extension for MPCI_fatal
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*/
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if (BSP_Configuration.User_multiprocessing_table)
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BSP_Configuration.maximum_extensions++;
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CPU_CLICKS_PER_TICK = 1;
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/*
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* Start most of RTEMS
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* main() will start the rest
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*/
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bsp_isr_level = rtems_initialize_executive_early(
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&BSP_Configuration,
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&Cpu_table
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);
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}
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