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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [sparc/] [erc32/] [startup/] [bspstart.c] - Rev 30
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/* * This set of routines starts the application. It includes application, * board, and monitor specific initialization and configuration. * The generic CPU dependent initialization has been performed * before any of these are 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. * * Ported to ERC32 implementation of the SPARC by On-Line Applications * Research Corporation (OAR) under contract to the European Space * Agency (ESA). * * ERC32 modifications of respective RTEMS file: COPYRIGHT (c) 1995. * European Space Agency. * * $Id: bspstart.c,v 1.2 2001-09-27 12:01:14 chris Exp $ */ #include <bsp.h> #include <rtems/libio.h> #include <libcsupport.h> #include <string.h> /* * 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; /* * Tells us where to put the workspace in case remote debugger is present. */ extern rtems_unsigned32 rdb_start; /* * Amount to increment itimer by each pass * It is a variable instead of a #define to allow the 'looptest' * script to bump it without recompiling rtems * * NOTE: This is based on the PA-RISC simulator. I don't know if we * can actually pull this trick on the SPARC simulator. */ rtems_unsigned32 CPU_SPARC_CLICKS_PER_TICK; #if SIMSPARC_FAST_IDLE /* * Many of the tests are very slow on the simulator because they have * have 5 second delays hardwired in. * * Try to speed those tests up by speeding up the clock when in the idle task. * * NOTE: At the current setting, 5 second delays in the tests take * approximately 5 seconds of wall time. */ rtems_extension fast_idle_switch_hook( rtems_tcb *current_task, rtems_tcb *heir_task ) { static rtems_unsigned32 normal_clock = ~0; static rtems_unsigned32 fast_clock; /* init our params on first call */ if (normal_clock == ~0) { normal_clock = CPU_SPARC_CLICKS_PER_TICK; fast_clock = CPU_SPARC_CLICKS_PER_TICK / 0x08; if (fast_clock == 0) /* handle pathological case */ fast_clock++; } /* * Run the clock faster when idle is in place. */ if (heir_task == _Thread_Idle) CPU_SPARC_CLICKS_PER_TICK = fast_clock; else if (current_task == _Thread_Idle) CPU_SPARC_CLICKS_PER_TICK = normal_clock; } #endif /* * Use the shared implementations of the following routines */ void bsp_postdriver_hook(void); void bsp_libc_init( void *, unsigned32, int ); extern void bsp_spurious_initialize(); /* * bsp_pretasking_hook * * BSP pretasking hook. Called just before drivers are initialized. * Used to setup libc and install any BSP extensions. */ void bsp_pretasking_hook(void) { extern int end; rtems_unsigned32 heap_start; rtems_unsigned32 heap_size; heap_start = (rtems_unsigned32) &end; if (heap_start & (CPU_ALIGNMENT-1)) heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1); heap_size = BSP_Configuration.work_space_start - (void *)&end; heap_size &= 0xfffffff0; /* keep it as a multiple of 16 bytes */ bsp_libc_init((void *) heap_start, heap_size, 0); #if SIMSPARC_FAST_IDLE /* * Install the fast idle task switch extension * * On MP systems, might not want to do this; it confuses at least * one test (mp06) on the PA-RISC simulator */ #if 0 if (BSP_Configuration.User_multiprocessing_table == 0) #endif { rtems_extensions_table fast_idle_extension; rtems_id extension_id; rtems_status_code rc; memset(&fast_idle_extension, 0, sizeof(fast_idle_extension)); fast_idle_extension.thread_switch = fast_idle_switch_hook; rc = rtems_extension_create( rtems_build_name('F', 'D', 'L', 'E'), &fast_idle_extension, &extension_id ); if (rc != RTEMS_SUCCESSFUL) rtems_fatal_error_occurred(rc); } #endif #ifdef RTEMS_DEBUG rtems_debug_enable( RTEMS_DEBUG_ALL_MASK ); #endif bsp_spurious_initialize(); } /* * bsp_start * * This routine does the bulk of the system initialization. */ void bsp_start( void ) { unsigned char *work_space_start; /* Check if MEC is initialised */ if (!(ERC32_MEC.Control & 0xfe080000)) { /* * DISABLE THE HARDWARE WATCHDOG!!! */ ERC32_MEC.Watchdog_Trap_Door_Set = 0; /* value is irrelevant */ /* * Reduce the number of wait states to 0 for all memory areas. */ ERC32_MEC.Wait_State_Configuration = 0; } /* * Set up our hooks * Make sure libc_init is done before drivers initialized so that * they can use atexit() */ Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */ Cpu_table.postdriver_hook = bsp_postdriver_hook; /* * SIS does zero out memory BUT only when IT begins execution. Thus * if we want to have a clean slate in the workspace each time we * begin execution of OUR application, then we must zero the workspace. */ Cpu_table.do_zero_of_workspace = TRUE; /* * This should be enough interrupt stack. */ Cpu_table.interrupt_stack_size = CONFIGURE_INTERRUPT_STACK_MEMORY; work_space_start = (unsigned char *)rdb_start - BSP_Configuration.work_space_size; if ( work_space_start <= (unsigned char *)&end ) { DEBUG_puts( "bspstart: Not enough RAM!!!\n" ); BSP_fatal_return(); } BSP_Configuration.work_space_start = work_space_start; #if SIMSPARC_FAST_IDLE /* * Add 1 extension for fast idle */ BSP_Configuration.maximum_extensions++; #endif /* * Add 1 extension for MPCI_fatal */ if (BSP_Configuration.User_multiprocessing_table) BSP_Configuration.maximum_extensions++; /* * Set the "clicks per tick" for the simulator * used by XXX/clock/clock.c to schedule interrupts */ CPU_SPARC_CLICKS_PER_TICK = BSP_Configuration.microseconds_per_tick; }
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