forked from Imagelibrary/rtems
2000-11-13 Jiri Gaisler <jgais@ws.estec.esa.nl>
* ChangeLog, .cvsignore, Makefile.am, bspclean.c, bspstart.c, gnatcommon.c, start.S: New files. Largely moved from ERC32 BSP to be able to be shared with LEON and other SPARC BSPs.
This commit is contained in:
Joel Sherrill
232
c/src/lib/libbsp/sparc/shared/bspstart.c
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232
c/src/lib/libbsp/sparc/shared/bspstart.c
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/*
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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) 1989-1999.
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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.OARcorp.com/rtems/license.html.
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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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/*
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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 rtems_unsigned32 rdb_start;
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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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* NOTE: This is based on the PA-RISC simulator. I don't know if we
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* can actually pull this trick on the SPARC simulator.
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*/
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rtems_unsigned32 CPU_SPARC_CLICKS_PER_TICK;
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#if SIMSPARC_FAST_IDLE
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/*
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* Many of the tests are very slow on the simulator because they have
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* have 5 second delays hardwired in.
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*
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* Try to speed those tests up by speeding up the clock when in the idle task.
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*
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* NOTE: At the current setting, 5 second delays in the tests take
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* approximately 5 seconds of wall time.
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*/
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rtems_extension fast_idle_switch_hook(
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rtems_tcb *current_task,
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rtems_tcb *heir_task
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)
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{
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static rtems_unsigned32 normal_clock = ~0;
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static rtems_unsigned32 fast_clock;
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/* init our params on first call */
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if (normal_clock == ~0)
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{
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normal_clock = CPU_SPARC_CLICKS_PER_TICK;
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fast_clock = CPU_SPARC_CLICKS_PER_TICK / 0x08;
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if (fast_clock == 0) /* handle pathological case */
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fast_clock++;
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}
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/*
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* Run the clock faster when idle is in place.
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*/
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if (heir_task == _Thread_Idle)
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CPU_SPARC_CLICKS_PER_TICK = fast_clock;
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else if (current_task == _Thread_Idle)
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CPU_SPARC_CLICKS_PER_TICK = normal_clock;
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}
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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 *, unsigned32, int );
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extern void bsp_spurious_initialize();
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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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rtems_unsigned32 heap_start;
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rtems_unsigned32 heap_size;
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heap_start = (rtems_unsigned32) &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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#if SIMSPARC_FAST_IDLE
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/*
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* Install the fast idle task switch extension
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*
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* On MP systems, might not want to do this; it confuses at least
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* one test (mp06) on the PA-RISC simulator
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*/
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#if 0
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if (BSP_Configuration.User_multiprocessing_table == 0)
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#endif
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{
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rtems_extensions_table fast_idle_extension;
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rtems_id extension_id;
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rtems_status_code rc;
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memset(&fast_idle_extension, 0, sizeof(fast_idle_extension));
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fast_idle_extension.thread_switch = fast_idle_switch_hook;
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rc = rtems_extension_create(
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rtems_build_name('F', 'D', 'L', 'E'),
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&fast_idle_extension,
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&extension_id
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);
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if (rc != RTEMS_SUCCESSFUL)
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rtems_fatal_error_occurred(rc);
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}
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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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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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* Set up our hooks
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* Make sure libc_init is done before drivers initialized 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.postdriver_hook = bsp_postdriver_hook;
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/*
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* SIS does zero out memory BUT only when IT begins execution. Thus
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* if we want to have a clean slate in the workspace each time we
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* begin execution of OUR application, then we must zero the workspace.
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*/
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Cpu_table.do_zero_of_workspace = TRUE;
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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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DEBUG_puts( "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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#if SIMSPARC_FAST_IDLE
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/*
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* Add 1 extension for fast idle
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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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/*
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* Set the "clicks per tick" for the simulator
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* used by XXX/clock/clock.c to schedule interrupts
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*/
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CPU_SPARC_CLICKS_PER_TICK = BSP_Configuration.microseconds_per_tick;
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}
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