diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/dmv177/startup/bspstart.c')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/dmv177/startup/bspstart.c | 312 |
1 files changed, 312 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/powerpc/dmv177/startup/bspstart.c b/c/src/lib/libbsp/powerpc/dmv177/startup/bspstart.c new file mode 100644 index 0000000000..fba086515c --- /dev/null +++ b/c/src/lib/libbsp/powerpc/dmv177/startup/bspstart.c @@ -0,0 +1,312 @@ +/* bspstart.c + * + * 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. + * + * Called by RTEMS::RTEMS constructor in rtems-ctor.cc + * + * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994, 1997. + * On-Line Applications Research Corporation (OAR). + * All rights assigned to U.S. Government, 1994. + * + * $Id$ + */ + +#include <bsp.h> +#include <rtems/libio.h> + +#include <libcsupport.h> + +#include <string.h> +#include <fcntl.h> + +#ifdef STACK_CHECKER_ON +#include <stackchk.h> +#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; +rtems_unsigned32 bsp_isr_level; + +/* PAGE + * + * bsp_libc_init + * + * Initialize whatever libc we are using called from bsp_postdriver_hook. + * + * Input parameters: NONE + * + * Output parameters: NONE + * + * Return values: NONE + * + */ + +void bsp_libc_init(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 */ + + RTEMS_Malloc_Initialize((void *) heap_start, heap_size, 0); + + /* + * Init the RTEMS libio facility to provide UNIX-like system + * calls for use by newlib (ie: provide __rtems_open, __rtems_close, etc) + * Uses malloc() to get area for the iops, so must be after malloc init + */ + + rtems_libio_init(); + + /* + * Set up for the libc handling. + */ + + if (BSP_Configuration.ticks_per_timeslice > 0) + libc_init(1); /* reentrant if possible */ + else + libc_init(0); /* non-reentrant */ + +} + + +/* PAGE + * + * bsp_pretasking_hook + * + * BSP pretasking hook. Called just before drivers are initialized. + * Used to setup libc and install any BSP extensions. + * + * Input parameters: NONE + * + * Output parameters: NONE + * + * Return values: NONE + * + */ + +void bsp_pretasking_hook(void) +{ + bsp_libc_init(); + +#ifdef STACK_CHECKER_ON + /* + * Initialize the stack bounds checker + * We can either turn it on here or from the app. + */ + + Stack_check_Initialize(); +#endif + +#ifdef RTEMS_DEBUG + rtems_debug_enable( RTEMS_DEBUG_ALL_MASK ); +#endif + +} + +/* PAGE + * + * bsp_predriver_hook + * + * Initialization before drivers are setup. + * Input parameters: NONE + * + * Output parameters: NONE + * + * Return values: NONE + */ + +void bsp_predriver_hook(void) +{ + initialize_external_exception_vector(); +} + +/* PAGE + * + * bsp_postdriver_hook + * + * After drivers are setup, register some "filenames" + * and open stdin, stdout, stderr files + * + * Newlib will automatically associate the files with these + * (it hardcodes the numbers) + * + * Input parameters: NONE + * + * Output parameters: NONE + * + * Return values: NONE + * + */ + +void bsp_postdriver_hook(void) +{ + int stdin_fd, stdout_fd, stderr_fd; + int error_code; + + error_code = 'S' << 24 | 'T' << 16; + + if ((stdin_fd = __rtems_open("/dev/console", O_RDONLY, 0)) == -1) + rtems_fatal_error_occurred( error_code | 'D' << 8 | '0' ); + + if ((stdout_fd = __rtems_open("/dev/console", O_WRONLY, 0)) == -1) + rtems_fatal_error_occurred( error_code | 'D' << 8 | '1' ); + + if ((stderr_fd = __rtems_open("/dev/console", O_WRONLY, 0)) == -1) + rtems_fatal_error_occurred( error_code | 'D' << 8 | '2' ); + + if ((stdin_fd != 0) || (stdout_fd != 1) || (stderr_fd != 2)) + rtems_fatal_error_occurred( error_code | 'I' << 8 | 'O' ); +} + +/* PAGE + * + * bsp_start + * + * This routine does the bulk of the system initialization. + * + * Input parameters: NONE + * + * Output parameters: NONE + * + * Return values: NONE + * + */ + +void bsp_start( void ) +{ + unsigned char *work_space_start; + unsigned int msr_value = 0x2030; + + /* + * Set BSP to initial value. Note: This value is a guess + * check how the real board comes up. This is critical to + * getting the source to work with the debugger. + */ + _CPU_MSR_SET( msr_value ); + + /* + * Set up our hooks + * Make sure libc_init is done before drivers initialized so that + * they can use atexit() + */ + + Cpu_table.exceptions_in_RAM = TRUE; + + Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */ + + Cpu_table.predriver_hook = bsp_predriver_hook; + + Cpu_table.postdriver_hook = bsp_postdriver_hook; + + Cpu_table.idle_task = NULL; /* do not override system IDLE task */ + + Cpu_table.clicks_per_usec = 66 / 4; /* XXX get from linkcmds */ + + + /* + * 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 = (12 * 1024); + + /* + * DMV170 does not support MP configurations so there is really no way + * to check this out. + */ + + Cpu_table.extra_mpci_receive_server_stack = 0; + + /* + * Copy the table and allocate memory for the RTEMS Workspace + */ + + BSP_Configuration = Configuration; + +#if defined(RTEMS_POSIX_API) + BSP_Configuration.work_space_size *= 3; +#endif + + work_space_start = + (unsigned char *)&RAM_END - BSP_Configuration.work_space_size; + + if ( work_space_start <= (unsigned char *)&end ) { + DEBUG_puts( "bspstart: Not enough RAM!!!\n" ); + bsp_cleanup(); + } + + BSP_Configuration.work_space_start = work_space_start; + + /* + * Add 1 region for RTEMS Malloc + */ + + BSP_Configuration.RTEMS_api_configuration->maximum_regions++; + + /* + * Account for the console's resources + */ + + console_reserve_resources( &BSP_Configuration ); + +#ifdef RTEMS_NEWLIB + /* + * Add 1 extension for newlib libc + */ + + BSP_Configuration.maximum_extensions++; +#endif + +#ifdef STACK_CHECKER_ON + /* + * Add 1 extension for stack checker + */ + + BSP_Configuration.maximum_extensions++; +#endif + + /* + * Add 1 extension for MPCI_fatal + */ + + if (BSP_Configuration.User_multiprocessing_table) + BSP_Configuration.maximum_extensions++; + + /* + * Initialize RTEMS. main() will finish it up and start multitasking. + */ + + rtems_libio_config( &BSP_Configuration, BSP_LIBIO_MAX_FDS ); + + bsp_isr_level = rtems_initialize_executive_early( + &BSP_Configuration, + &Cpu_table + ); +} + + + + |