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Diffstat (limited to 'c/src/lib/libbsp/i386/pc386/startup/bspstart.c')
| -rw-r--r-- | c/src/lib/libbsp/i386/pc386/startup/bspstart.c | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/i386/pc386/startup/bspstart.c b/c/src/lib/libbsp/i386/pc386/startup/bspstart.c new file mode 100644 index 0000000000..73c9e6adeb --- /dev/null +++ b/c/src/lib/libbsp/i386/pc386/startup/bspstart.c @@ -0,0 +1,241 @@ +/*-------------------------------------------------------------------------+ +| bspstart.c v1.1 - PC386 BSP - 1997/08/07 ++--------------------------------------------------------------------------+ +| This file contains the PC386 BSP startup package. It includes application, +| board, and monitor specific initialization and configuration. The generic CPU +| dependent initialization has been performed before this routine is invoked. ++--------------------------------------------------------------------------+ +| (C) Copyright 1997 - +| - NavIST Group - Real-Time Distributed Systems and Industrial Automation +| +| http://pandora.ist.utl.pt +| +| Instituto Superior Tecnico * Lisboa * PORTUGAL ++--------------------------------------------------------------------------+ +| Disclaimer: +| +| This file is provided "AS IS" without warranty of any kind, either +| expressed or implied. ++--------------------------------------------------------------------------+ +| This code is based on: +| bspstart.c,v 1.8 1996/05/28 13:12:40 joel Exp - go32 BSP +| With the following copyright notice: +| ************************************************************************** +| * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. * +| * On-Line Applications Research Corporation (OAR). * +| * All rights assigned to U.S. Government, 1994. * +| * * +| * This material may be reproduced by or for the U.S. Government pursuant * +| * to the copyright license under the clause at DFARS 252.227-7013. This * +| * notice must appear in all copies of this file and its derivatives. * +| ************************************************************************** ++--------------------------------------------------------------------------*/ + + +#include <fcntl.h> + +#include <bsp.h> +#include <libcsupport.h> +#include <rtems/libio.h> + +#ifdef STACK_CHECKER_ON +#include <stackchk.h> +#endif + +/*-------------------------------------------------------------------------+ +| Global Variables ++--------------------------------------------------------------------------*/ +#ifdef RTEMS_SMALL_MEMORY +extern rtems_unsigned32 _end; /* End of BSS. Defined in 'linkcmds'. */ + +rtems_unsigned32 rtemsFreeMemStart = (rtems_unsigned32)&_end; + /* Address of start of free memory - should be updated + after creating new partitions or regions. */ +#else +rtems_unsigned32 rtemsFreeMemStart = RAM_START; + /* RAM_START defined in 'bsp.h'. */ +#endif /* RTEMS_SMALL_MEMORY */ + +/* The original BSP configuration 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; /* CPU configuration table. */ +char *rtems_progname; /* Program name - from main(). */ + + +/*-------------------------------------------------------------------------+ +| External Prototypes ++--------------------------------------------------------------------------*/ +extern void _exit(int); /* define in exit.c */ + +/*-------------------------------------------------------------------------+ +| Function: bsp_libc_init +| Description: Initialize whatever libc we are using. Called from +| pretasking hook. +| Global Variables: rtemsFreeMemStart. +| Arguments: None. +| Returns: Nothing. ++--------------------------------------------------------------------------*/ +static void +bsp_libc_init(void) +{ + if (rtemsFreeMemStart & (CPU_ALIGNMENT - 1)) /* not aligned => align it */ + rtemsFreeMemStart = (rtemsFreeMemStart+CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1); + + RTEMS_Malloc_Initialize((void *)rtemsFreeMemStart, HEAP_SIZE << 10, 0); + rtemsFreeMemStart += HEAP_SIZE << 10; /* HEAP_SIZE is in KBytes */ + + /* 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 initialization. */ + + 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 */ +} /* bsp_libc_init */ + + +/*-------------------------------------------------------------------------+ +| Function: bsp_pretasking_hook +| Description: BSP pretasking hook. Called just before drivers are +| initialized. Used to setup libc and install any BSP +| extensions. NOTE: Must not use libc (to do io) from here, +| since drivers are not yet initialized. +| Global Variables: None. +| Arguments: None. +| Returns: Nothing. ++--------------------------------------------------------------------------*/ +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 /* STACK_CHECKER_ON */ + +#ifdef RTEMS_DEBUG + + rtems_debug_enable(RTEMS_DEBUG_ALL_MASK); + +#endif /* RTEMS_DEBUG */ +} /* bsp_pretasking_hook */ + + +/*-------------------------------------------------------------------------+ +| Function: bsp_postdriver_hook +| Description: 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). +| Global Variables: None. +| Arguments: None. +| Returns: Nothing. ++--------------------------------------------------------------------------*/ +void +bsp_postdriver_hook(void) +{ + int stdin_fd, stdout_fd, stderr_fd; + + rtems_status_code error_code; + + error_code = 'S' << 24 | 'T' << 16; + + /* open standard devices: stdout, stderr and stdin */ + + if ((stdin_fd = __rtems_open("/dev/console", O_RDONLY, 0)) < 0) + rtems_fatal_error_occurred( error_code | 'D' << 8 | '0' ); + + if ((stdout_fd = __rtems_open("/dev/console", O_WRONLY, 0)) < 0) + 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' ); +} /* bsp_postdriver_hook */ + + +/*-------------------------------------------------------------------------+ +| Function: main +| Description: Called from bsp's startup code ('start.s'). +| Global Variables: None. +| Arguments: None. +| Returns: Nothing. ++--------------------------------------------------------------------------*/ +int main(int argc, char **argv, char **environp) +{ + /* If we don't have command line arguments set default program name. */ + + if ((argc > 0) && argv && argv[0]) + rtems_progname = argv[0]; + else + rtems_progname = "RTEMS"; + + Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */ + Cpu_table.predriver_hook = NULL; /* use system's */ + Cpu_table.postdriver_hook = bsp_postdriver_hook; + Cpu_table.idle_task = NULL; + /* do not override system IDLE task */ + Cpu_table.do_zero_of_workspace = TRUE; + Cpu_table.interrupt_table_segment = get_ds(); + Cpu_table.interrupt_table_offset = (void *)Interrupt_descriptor_table; + Cpu_table.interrupt_stack_size = 4096; + Cpu_table.extra_mpci_receive_server_stack = 0; + + /* Copy user's table and make necessary adjustments. */ + + BSP_Configuration = Configuration; + + /* Place RTEMS workspace at top of physical RAM (RAM_END defined in 'bsp.h' */ + + BSP_Configuration.work_space_start = + (void *)(RAM_END - BSP_Configuration.work_space_size); + + /* Add 1 region for Malloc in libc_low. */ + + BSP_Configuration.RTEMS_api_configuration->maximum_regions++; + + /* Add 1 extension for newlib libc. */ + +#ifdef RTEMS_NEWLIB + BSP_Configuration.maximum_extensions++; +#endif + + /* Add another extension if using the stack checker. */ + +#ifdef STACK_CHECKER_ON + BSP_Configuration.maximum_extensions++; +#endif + + /* Tell libio how many fd's we want and allow it to tweak config. */ + + rtems_libio_config(&BSP_Configuration, BSP_LIBIO_MAX_FDS); + + rtems_initialize_executive(&BSP_Configuration, &Cpu_table); + /* does not return */ + + /*-------------------------------------------------------------------------+ + | We only return here if the executive has finished. This happens when the + | task has called exit(). We will then call _exit() which is part of the bsp. + +--------------------------------------------------------------------------*/ + + for (;;) + _exit(0); + + /* no cleanup necessary for PC386 */ + + return 0; +} /* main */ |