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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [a29k/] [portsw/] [startup/] [bspstart.c] - Rev 173
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/* * This routine starts the application. It includes application, * board, and monitor specific initialization and configuration. * The generic CPU dependent initialization has been performed * before this routine is invoked. * * COPYRIGHT (c) 1989-1999. * On-Line Applications Research Corporation (OAR). * * The license and distribution terms for this file may be * found in the file LICENSE in this distribution or at * http://www.OARcorp.com/rtems/license.html. * * $Id: bspstart.c,v 1.2 2001-09-27 11:59:42 chris Exp $ */ #include <bsp.h> #include <rtems/libio.h> #include <libcsupport.h> #include <string.h> #ifndef lint static char _sccsid[] = "@(#)bspstart.c 09/11/96 1.15\n"; #endif /* * The original table from the application and our copy of it with * some changes. */ extern rtems_configuration_table Configuration; rtems_configuration_table BSP_Configuration; rtems_cpu_table Cpu_table; char *rtems_progname; /* Initialize whatever libc we are using * called from postdriver hook */ #define HEAP_BLOCK_SIZE (16 * 1024) rtems_unsigned32 heap_size = 0; rtems_unsigned32 heap_start; /* * Use the shared implementations of the following routines */ void bsp_postdriver_hook(void); void bsp_libc_init( void *, unsigned32, int ); /* * Function: bsp_pretasking_hook * Created: 95/03/10 * * Description: * BSP pretasking hook. Called just before drivers are initialized. * Used to setup libc and install any BSP extensions. * * NOTES: * Must not use libc (to do io) from here, since drivers are * not yet initialized. * */ void bsp_pretasking_hook(void) { /* allocate a maximum of 2 megabytes for the heap */ heap_size = 2 * 1024 * 1024; /* allocate all remaining memory to the heap */ do { heap_size -= HEAP_BLOCK_SIZE; heap_start = _sysalloc( heap_size ); } while ( !heap_start ); if (!heap_start) rtems_fatal_error_occurred( heap_size ); if (heap_start & (CPU_ALIGNMENT-1)) heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1); bsp_libc_init((void *) heap_start, heap_size, 0); #ifdef RTEMS_DEBUG rtems_debug_enable( RTEMS_DEBUG_ALL_MASK ); #endif } /* * bsp_start * * This routine does the bulk of the system initialization. */ int bsp_start( int argc, char **argv, char **environp ) { if ((argc > 0) && argv && argv[0]) rtems_progname = argv[0]; else rtems_progname = "RTEMS"; /* set the PIA0 register wait states */ *(volatile unsigned32 *)0x80000020 = 0x04080000; /* * Allocate the memory for the RTEMS Work Space. This can come from * a variety of places: hard coded address, malloc'ed from outside * RTEMS world (e.g. simulator or primitive memory manager), or (as * typically done by stock BSPs) by subtracting the required amount * of work space from the last physical address on the CPU board. */ /* * Need to "allocate" the memory for the RTEMS Workspace and * tell the RTEMS configuration where it is. This memory is * not malloc'ed. It is just "pulled from the air". */ BSP_Configuration.work_space_start = _sysalloc( BSP_Configuration.work_space_size + 512 ); if (!BSP_Configuration.work_space_start) rtems_fatal_error_occurred( BSP_Configuration.work_space_size ); BSP_Configuration.work_space_start = (void *) ((unsigned int)((char *)BSP_Configuration.work_space_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1)); /* * initialize the CPU table for this BSP */ Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */ Cpu_table.postdriver_hook = bsp_postdriver_hook; Cpu_table.interrupt_stack_size = CONFIGURE_INTERRUPT_STACK_MEMORY; _settrap( 109,&a29k_enable_sup); _settrap( 110,&a29k_disable_sup); _settrap( 111,&a29k_enable_all_sup); _settrap( 112,&a29k_disable_all_sup); _settrap( 106,&a29k_context_switch_sup); _settrap( 107,&a29k_context_restore_sup); _settrap( 108,&a29k_context_save_sup); _settrap( 105,&a29k_sigdfl_sup); /* * Start RTEMS */ rtems_initialize_executive( &BSP_Configuration, &Cpu_table ); bsp_cleanup(); return 0; }