forked from Imagelibrary/rtems
Ada95, gnat, go32
This commit is contained in:
Joel Sherrill
314
c/src/lib/libbsp/unix/posix/startup/bspstart.c
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314
c/src/lib/libbsp/unix/posix/startup/bspstart.c
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/*
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* @(#)bspstart.c 1.7 - 95/04/07
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*
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*/
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/* 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, 1990, 1991, 1992, 1993, 1994.
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* On-Line Applications Research Corporation (OAR).
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* All rights assigned to U.S. Government, 1994.
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*
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* This material may be reproduced by or for the U.S. Government pursuant
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* to the copyright license under the clause at DFARS 252.227-7013. This
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* notice must appear in all copies of this file and its derivatives.
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*
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* $Id$
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*/
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#include <rtems.h>
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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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#include <unistd.h>
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#include <sys/stat.h>
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#include <bsp.h>
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#include <libcsupport.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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char **rtems_envp;
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#define WORKSPACE_SIZE (WORKSPACE_MB * (1024 * 1024))
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#define HEAPSPACE_SIZE (HEAPSPACE_MB * (1024 * 1024))
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rtems_unsigned8 MY_WORK_SPACE[ WORKSPACE_SIZE ] CPU_STRUCTURE_ALIGNMENT;
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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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Heap_size = 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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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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/*
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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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struct stat stat_buf;
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char buf[256];
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char node[6];
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char *home;
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int fd;
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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 the file $HOME/rtems_node
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*/
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BSP_Multiprocessing.node = -1;
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if (BSP_Configuration.User_multiprocessing_table) {
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if (BSP_Configuration.User_multiprocessing_table->node == -1) {
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home = getenv("HOME");
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sprintf(buf, "%s/%s", home, "rtems_node");
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if ((stat(buf, &stat_buf)) == 0) {
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fd = open(buf, O_RDONLY);
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read(fd, node, 5);
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close(fd);
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unlink(buf);
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BSP_Multiprocessing = *BSP_Configuration.User_multiprocessing_table;
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BSP_Multiprocessing.node = atoi(node);
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BSP_Configuration.User_multiprocessing_table = &BSP_Multiprocessing;
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}
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if (BSP_Configuration.User_multiprocessing_table->maximum_nodes == -1) {
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home = getenv("HOME");
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sprintf(buf, "%s/%s", home, "rtems_max_node");
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if ((stat(buf, &stat_buf)) == 0) {
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fd = open(buf, O_RDONLY);
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read(fd, node, 5);
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close(fd);
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BSP_Multiprocessing.maximum_nodes = atoi(node);
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}
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}
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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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BSP_Configuration.work_space_start = (void *)MY_WORK_SPACE;
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if (BSP_Configuration.work_space_size)
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BSP_Configuration.work_space_size = WORKSPACE_SIZE;
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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 = NULL;
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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_system_initialization_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.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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* 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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