/* 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).
*
* 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 <bsp/irq.h>
#include <rtems/bspIo.h>
#include <libcpu/cpuIdent.h>
#include <libcpu/spr.h>
#include <rtems/powerpc/powerpc.h>
SPR_RW(SPRG0)
SPR_RW(SPRG1)
#include RTEMS_XPARAMETERS_H
#include <stdio.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;
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_postdriver_hook(void);
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);
}
/*
*
* bsp_predriver_hook
*
* Before drivers are setup.
*/
void bsp_predriver_hook(void)
{
}
/*
* 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)BSP_Configuration.work_space_start +
BSP_Configuration.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 */
/*
XAssertSetCallback((XAssertCallback*)bsp_XAssertHandler);
*/
#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 )
{
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 CPU table for this BSP
* NOTE: this must be before the exception initialization,
* because exception code useses some information from Cpu_table
*/
Cpu_table.interrupt_stack_size = CONFIGURE_INTERRUPT_STACK_MEMORY;
/* 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);
/* signal them that we have fixed PR288 - eventually, this should go away */
_write_SPRG0(PPC_BSP_HAS_FIXED_PR288);
/*
* 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 */
BSP_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();
}
