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Diffstat (limited to 'c/src/lib/libbsp/powerpc/gen405/startup/bspstart.c')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/gen405/startup/bspstart.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/powerpc/gen405/startup/bspstart.c b/c/src/lib/libbsp/powerpc/gen405/startup/bspstart.c new file mode 100644 index 0000000000..5f65ebeb2e --- /dev/null +++ b/c/src/lib/libbsp/powerpc/gen405/startup/bspstart.c @@ -0,0 +1,199 @@ +/* bsp_start() + * + * This routine starts the application. It includes application, + * board, and monitor specific initialization and configuration. + * The generic CPU dependent initialization has been performed + * before this routine is invoked. + * + * INPUT: NONE + * + * OUTPUT: NONE + * + * Author: Thomas Doerfler <td@imd.m.isar.de> + * IMD Ingenieurbuero fuer Microcomputertechnik + * + * COPYRIGHT (c) 1998 by IMD + * + * Changes from IMD are covered by the original distributions terms. + * This file has been derived from the papyrus BSP: + * + * Author: Andrew Bray <andy@i-cubed.co.uk> + * + * COPYRIGHT (c) 1995 by i-cubed ltd. + * + * To anyone who acknowledges that this file is provided "AS IS" + * without any express or implied warranty: + * permission to use, copy, modify, and distribute this file + * for any purpose is hereby granted without fee, provided that + * the above copyright notice and this notice appears in all + * copies, and that the name of i-cubed limited not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * i-cubed limited makes no representations about the suitability + * of this software for any purpose. + * + * Modifications for spooling console driver and control of memory layout + * with linker command file by + * Thomas Doerfler <td@imd.m.isar.de> + * for these modifications: + * COPYRIGHT (c) 1997 by IMD, Puchheim, Germany. + * + * To anyone who acknowledges that this file is provided "AS IS" + * without any express or implied warranty: + * permission to use, copy, modify, and distribute this file + * for any purpose is hereby granted without fee, provided that + * the above copyright notice and this notice appears in all + * copies. IMD makes no representations about the suitability + * of this software for any purpose. + * + * Derived from c/src/lib/libbsp/no_cpu/no_bsp/startup/bspstart.c: + * + * 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. + * + * Modifications for PPC405GP by Dennis Ehlin + * + * $Id$ + */ + +#include <string.h> +#include <fcntl.h> + +#include <bsp.h> +#include <rtems/libio.h> +#include <rtems/libcsupport.h> +#include <ictrl.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; + +char *rtems_progname; +void *bsp_ram_end = (void *)RAM_END; /* first addr behind avail. ram area */ + +/* Initialize whatever libc we are using + * called from postdriver hook + */ + +void bsp_postdriver_hook(void); +void bsp_libc_init( void *, unsigned32, int ); + +/* + * + * bsp_predriver_hook + * + * Before drivers are setup. + */ + +void bsp_predriver_hook(void) +{ + rtems_status_code status; + /* init the PPC405 external interrupt controller handler... */ + status = ictrl_init(); +} + +/* + * Function: bsp_pretasking_hook + * Created: 95/03/10 + * + * Description: + * BSP pretasking hook. Called just before drivers are initialized. + * Used to setup libc and install any BSP extensions. + * + * NOTES: + * Must not use libc (to do io) from here, since drivers are + * not yet initialized. + * + */ + +void bsp_pretasking_hook(void) +{ + extern int _end; + extern int _heap_end; + rtems_unsigned32 heap_start; + rtems_unsigned32 heap_size; + rtems_unsigned32 heap_end; + + + heap_start = (rtems_unsigned32) &_end; + if (heap_start & (CPU_ALIGNMENT-1)) + heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1); + + heap_end = (rtems_unsigned32) &_heap_end; + if (heap_end & (CPU_ALIGNMENT-1)) + heap_end = (heap_end + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1); + + heap_size = heap_end - heap_start; + + bsp_libc_init((void *) heap_start, heap_size, 0); /* 64 * 1024 */ + +#ifdef RTEMS_DEBUG + rtems_debug_enable( RTEMS_DEBUG_ALL_MASK ); +#endif + +} + + +/* + * bsp_start + * + * This routine does the bulk of the system initialization. + */ + +void bsp_start( void ) +{ + /* + * Allocate the memory for the RTEMS Work Space. This can come from + * a variety of places: hard coded address, malloc'ed from outside + * RTEMS world (e.g. simulator or primitive memory manager), or (as + * typically done by stock BSPs) by subtracting the required amount + * of work space from the last physical address on the CPU board. + */ + + /* + * Need to "allocate" the memory for the RTEMS Workspace and + * tell the RTEMS configuration where it is. This memory is + * not malloc'ed. It is just "pulled from the air". + */ + /* FIME: plan usage of RAM better: + - make top of ram dynamic, + - take out some part for persistant log + - make rest of ram to heap... + -remove RAM_END from bsp.h, this cannot be valid... + or must be a function call + */ + BSP_Configuration.work_space_start = (void *) + ((char *)(bsp_ram_end)) - BSP_Configuration.work_space_size; + + /* + * initialize the CPU table for this BSP + */ + + 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.interrupt_stack_size = CONFIGURE_INTERRUPT_STACK_MEMORY; + + Cpu_table.clicks_per_usec = 300; + Cpu_table.serial_per_sec = 14625000; /* = (CPU Clock / UART Internal Clock Divisor) */ + Cpu_table.serial_external_clock = 0; + Cpu_table.timer_internal_clock = 1; + Cpu_table.serial_xon_xoff = 0; + Cpu_table.serial_cts_rts = 1; + Cpu_table.serial_rate = 115200; + Cpu_table.timer_average_overhead = 2; + Cpu_table.timer_least_valid = 3; + Cpu_table.exceptions_in_RAM = TRUE; +} |