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Diffstat (limited to 'cpukit/sapi/src/exinit.c')
| -rw-r--r-- | cpukit/sapi/src/exinit.c | 297 |
1 files changed, 297 insertions, 0 deletions
diff --git a/cpukit/sapi/src/exinit.c b/cpukit/sapi/src/exinit.c new file mode 100644 index 0000000000..96da35e825 --- /dev/null +++ b/cpukit/sapi/src/exinit.c @@ -0,0 +1,297 @@ +/* + * Initialization Manager + * + * COPYRIGHT (c) 1989-1997. + * On-Line Applications Research Corporation (OAR). + * Copyright assigned to U.S. Government, 1994. + * + * The license and distribution terms for this file may in + * the file LICENSE in this distribution or at + * http://www.OARcorp.com/rtems/license.html. + * + * $Id$ + */ + +/* + * SCORE_INIT and SAPI_INIT are defined so all of the super core and + * super API data will be included in this object file. + */ + +#define SAPI_INIT +#define SCORE_INIT + +#include <rtems/system.h> +#include <rtems/config.h> +#include <rtems/debug.h> +#include <rtems/extension.h> +#include <rtems/fatal.h> +#include <rtems/init.h> +#include <rtems/io.h> +#include <rtems/score/sysstate.h> + +#include <rtems/score/apiext.h> +#include <rtems/score/copyrt.h> +#include <rtems/score/heap.h> +#include <rtems/score/interr.h> +#include <rtems/score/isr.h> +#include <rtems/score/mpci.h> +#include <rtems/score/priority.h> +#include <rtems/score/thread.h> +#include <rtems/score/tod.h> +#include <rtems/score/userext.h> +#include <rtems/score/watchdog.h> +#include <rtems/score/wkspace.h> + +#include <rtems/directives.h> +#include <rtems/sptables.h> + + +#include <rtems/rtems/rtemsapi.h> +#ifdef RTEMS_POSIX_API +#include <rtems/posix/posixapi.h> +#endif + +/*PAGE + * + * rtems_initialize_executive + * + * This directive initializes all the kernels data structures + * to the states necessary for the kernel to begin execution. All + * include files that contain global variable definitions should be + * included in this file. The system threads and initialization threads + * are created and started by this routine. This routine then + * initiates multithreading. + * + * Input parameters: + * configuration_table - pointer to the user's configuration table + * cpu_table - pointer to the user's CPU configuration table + * + * Output parameters: NONE + */ + +void rtems_initialize_executive( + rtems_configuration_table *configuration_table, + rtems_cpu_table *cpu_table +) +{ + rtems_interrupt_level bsp_level; + + bsp_level = rtems_initialize_executive_early(configuration_table, cpu_table); + rtems_initialize_executive_late( bsp_level ); +} + +rtems_interrupt_level rtems_initialize_executive_early( + rtems_configuration_table *configuration_table, + rtems_cpu_table *cpu_table +) +{ + rtems_interrupt_level bsp_level; + rtems_multiprocessing_table *multiprocessing_table; + + /* + * Dispatching and interrupts are disabled until the end of the + * initialization sequence. This prevents an inadvertent context + * switch before the executive is initialized. + */ + + _ISR_Disable( bsp_level ); + + if ( configuration_table == NULL ) + _Internal_error_Occurred( + INTERNAL_ERROR_CORE, + TRUE, + INTERNAL_ERROR_NO_CONFIGURATION_TABLE + ); + + /* + * Initialize the system state based on whether this is an MP system. + */ + + multiprocessing_table = configuration_table->User_multiprocessing_table; + + _System_state_Handler_initialization( + (multiprocessing_table) ? TRUE : FALSE + ); + + /* + * Provided just for user convenience. + */ + + _Configuration_Table = configuration_table; + _Configuration_MP_table = multiprocessing_table; + + /* + * Internally we view single processor systems as a very restricted + * multiprocessor system. + */ + + if ( multiprocessing_table == NULL ) + multiprocessing_table = + (void *)&_Initialization_Default_multiprocessing_table; + + if ( cpu_table == NULL ) + _Internal_error_Occurred( + INTERNAL_ERROR_CORE, + TRUE, + INTERNAL_ERROR_NO_CPU_TABLE + ); + + _CPU_Initialize( cpu_table, _Thread_Dispatch ); + + /* + * Do this as early as possible to insure no debugging output + * is even attempted to be printed. + */ + + _Debug_Manager_initialization(); + + _API_extensions_Initialization(); + + _Thread_Dispatch_initialization(); + + _User_extensions_Handler_initialization( + configuration_table->User_extension_table + ); + + _Workspace_Handler_initialization( + (void *)configuration_table->work_space_start, + configuration_table->work_space_size + ); + + _ISR_Handler_initialization(); + + _Objects_Handler_initialization( + multiprocessing_table->node, + multiprocessing_table->maximum_nodes, + multiprocessing_table->maximum_global_objects + ); + + _Priority_Handler_initialization(); + + _Watchdog_Handler_initialization(); + + _TOD_Handler_initialization( configuration_table->microseconds_per_tick ); + + _Thread_Handler_initialization( + configuration_table->ticks_per_timeslice, + configuration_table->maximum_extensions, + multiprocessing_table->maximum_proxies + ); + + _MPCI_Handler_initialization( + multiprocessing_table->User_mpci_table, + RTEMS_TIMEOUT + ); + +/* MANAGERS */ + + _Extension_Manager_initialization( configuration_table->maximum_extensions ); + + _IO_Manager_initialization( + configuration_table->Device_driver_table, + configuration_table->number_of_device_drivers, + configuration_table->maximum_devices + ); + + _RTEMS_API_Initialize( configuration_table ); + +#ifdef RTEMS_POSIX_API + _POSIX_API_Initialize( configuration_table ); +#endif + + _System_state_Set( SYSTEM_STATE_BEFORE_MULTITASKING ); + + if ( cpu_table->pretasking_hook ) + (*cpu_table->pretasking_hook)(); + + /* + * No threads should be created before this point!!! + * + * At this point all API extensions are in place. After the call to + * _Thread_Create_idle() _Thread_Executing will be set. + * and _Thread_Heir are not set yet. + */ + + _Thread_Create_idle(); + + _MPCI_Create_server(); + + /* + * Run the API and BSPs predriver hook. + */ + + _API_extensions_Run_predriver(); + + if ( _CPU_Table.predriver_hook ) + (*_CPU_Table.predriver_hook)(); + + /* + * Initialize all the device drivers and initialize the MPCI layer. + * + * NOTE: The MPCI may be build upon a device driver. + */ + + _IO_Initialize_all_drivers(); + + if ( _System_state_Is_multiprocessing ) { + _MPCI_Initialization(); + _MPCI_Internal_packets_Send_process_packet( + MPCI_PACKETS_SYSTEM_VERIFY + ); + } + + /* + * Run the APIs and BSPs postdriver hooks. + * + * The API extensions are supposed to create user initialization tasks. + */ + + _API_extensions_Run_postdriver(); + + if ( _CPU_Table.postdriver_hook ) + (*_CPU_Table.postdriver_hook)(); + + return bsp_level; +} + +void rtems_initialize_executive_late( + rtems_interrupt_level bsp_level +) +{ + + _System_state_Set( SYSTEM_STATE_BEGIN_MULTITASKING ); + + _Thread_Start_multitasking(); + + /* + * Restore the interrupt level to what the BSP had. Technically, + * this is unnecessary since the BSP should have all interrupts + * disabled when rtems_initialize_executive is invoked. But this keeps + * the ISR Disable/Enable calls paired. + */ + + _ISR_Enable( bsp_level ); +} + +/*PAGE + * + * rtems_shutdown_executive + * + * This kernel routine shutdowns the executive. It halts multitasking + * and returns control to the application execution "thread" which + * initialially invoked the rtems_initialize_executive directive. + * + * Input parameters: NONE + * + * Output parameters: NONE + */ + +void rtems_shutdown_executive( + unsigned32 result +) +{ + if ( _System_state_Current != SYSTEM_STATE_SHUTDOWN ) { + _System_state_Set( SYSTEM_STATE_SHUTDOWN ); + _Thread_Stop_multitasking(); + } +} |