/* 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 * 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 * * 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 * 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). * * Modifications for PPC405GP by Dennis Ehlin * * $Id$ */ #warning The interrupt disable mask is now stored in SPRG0, please verify that this is compatible to this BSP (see also bootcard.c). #include #include #include #include #include #include #include #include #include #include SPR_RW(SPRG1) #include RTEMS_XPARAMETERS_H #include uint32_t _heap_start; uint32_t _heap_end; uint32_t _top_of_ram; /* * Driver configuration parameters */ uint32_t bsp_clicks_per_usec; uint32_t bsp_serial_per_sec; /* Serial clocks per second */ boolean bsp_serial_external_clock; boolean bsp_serial_xon_xoff; boolean bsp_serial_cts_rts; uint32_t bsp_serial_rate; uint32_t bsp_timer_average_overhead; /* Average overhead of timer in ticks */ uint32_t bsp_timer_least_valid; /* Least valid number from timer */ boolean bsp_timer_internal_clock; /* TRUE, when timer runs with CPU clk */ /* Initialize whatever libc we are using * called from postdriver hook */ void bsp_XAssertHandler(const char* file, int line); void bsp_libc_init( void *, uint32_t, int ); void bsp_XAssertHandler(const char* file, int line) { printf("\n***\n*** XAssert Failed! File: %s, Line: %d\n***\n", file, line); } /* * 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) { uint32_t heap_start; uint32_t heap_size; uint32_t heap_end; /* round up from the top of workspace to next 64k boundary, get * default heapsize from linker script */ heap_start = (((uint32_t)Configuration.work_space_start + rtems_configuration_get_work_space_size()) + 0x18000) & 0xffff0000; heap_end = _heap_start + (uint32_t)&_HeapSize; heap_size = (heap_end - heap_start); _heap_start = heap_start; _heap_end = heap_end; _top_of_ram = heap_end; bsp_libc_init((void *) heap_start, heap_size, 0); /* 64 * 1024 */ } /* * bsp_start * * This routine does the bulk of the system initialization. */ void bsp_start( void ) { extern unsigned long *intrStackPtr; register unsigned char* intrStack; ppc_cpu_id_t myCpu; ppc_cpu_revision_t myCpuRevision; /* * Get CPU identification dynamically. Note that the get_ppc_cpu_type() * function store the result in global variables * so that it can be used latter... */ myCpu = get_ppc_cpu_type(); myCpuRevision = get_ppc_cpu_revision(); /* * initialize the device driver parameters */ /* timebase register ticks/microsecond */ bsp_clicks_per_usec = (250000000 / 1000000); bsp_serial_per_sec = 14625000; bsp_serial_external_clock = 0; bsp_timer_internal_clock = 1; bsp_serial_xon_xoff = 0; bsp_serial_cts_rts = 0; bsp_serial_rate = 115200; bsp_timer_average_overhead = 2; bsp_timer_least_valid = 3; /* * Initialize some SPRG registers related to irq handling */ intrStack = (((unsigned char*)&intrStackPtr) - PPC_MINIMUM_STACK_FRAME_SIZE); _write_SPRG1((unsigned int)intrStack); /* * Initialize default raw exception handlers. * See shared/vectors/vectors_init.c */ initialize_exceptions(); /* * Install our own set of exception vectors */ BSP_rtems_irq_mng_init(0); /* * 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, - make rest of ram to heap... -remove RAM_END from bsp.h, this cannot be valid... or must be a function call */ { extern int _end; /* round _end up to next 64k boundary for start of workspace */ Configuration.work_space_start = (void *)((((uint32_t)&_end) + 0x18000) & 0xffff0000); } } void BSP_ask_for_reset(void) { printk("system stopped, press RESET"); while(1) {}; } void BSP_panic(char *s) { printk("%s PANIC %s\n",_RTEMS_version, s); BSP_ask_for_reset(); } void _BSP_Fatal_error(unsigned int v) { printk("%s PANIC ERROR %x\n",_RTEMS_version, v); BSP_ask_for_reset(); }