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/* 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 this routine is invoked.
*
* COPYRIGHT (c) 1989-1998.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* SS555 port sponsored by Defence Research and Development Canada - Suffield
* Copyright (C) 2004, Real-Time Systems Inc. (querbach@realtime.bc.ca)
*
* Derived from c/src/lib/libbsp/powerpc/mbx8xx/startup/bspstart.c:
*
* Modifications for MBX860:
* Copyright (c) 1999, National Research Council of Canada
*
* $Id$
*/
#include <string.h>
#include <rtems/libio.h>
#include <rtems/libcsupport.h>
#include <rtems/bspIo.h>
#include <libcpu/cpuIdent.h>
#include <libcpu/spr.h>
#include <bsp/irq.h>
#include <bsp.h>
SPR_RW(SPRG0)
SPR_RW(SPRG1)
/*
* The original table from the application (in ROM) and our copy of it with
* some changes. Configuration is defined in <confdefs.h>. Make sure that
* our configuration tables are uninitialized so that they get allocated in
* the .bss section (RAM).
*/
extern rtems_configuration_table Configuration;
extern unsigned long intrStackPtr;
rtems_configuration_table BSP_Configuration;
rtems_cpu_table Cpu_table;
char *rtems_progname;
/*
* Use the shared implementations of the following routines.
* Look in rtems/c/src/lib/libbsp/shared/bsppost.c and
* rtems/c/src/lib/libbsp/shared/bsplibc.c.
*/
void bsp_postdriver_hook(void);
void bsp_libc_init( void *, unsigned32, int );
void BSP_panic(char *s)
{
printk("%s PANIC %s\n",_RTEMS_version, s);
__asm__ __volatile ("sc");
}
void _BSP_Fatal_error(unsigned int v)
{
printk("%s PANIC ERROR %x\n",_RTEMS_version, v);
__asm__ __volatile ("sc");
}
/*
* bsp_pretasking_hook
*
* Called when RTEMS initialization is complete but before interrupts and
* tasking are enabled. Used to setup libc and install any BSP extensions.
*
* Must not use libc (to do io) from here, since drivers are not yet
* initialized.
*
* Installed in the rtems_cpu_table defined in
* rtems/c/src/exec/score/cpu/powerpc/rtems/new-exceptions/cpu.h by main()
* below. Called from rtems_initialize_executive() defined in
* rtems/c/src/exec/sapi/src/init.c
*
* Input parameters: NONE
*
* Output parameters: NONE
*
* Return values: NONE
*/
void bsp_pretasking_hook(void)
{
/*
* These are assigned addresses in the linkcmds file for the BSP. This
* approach is better than having these defined as manifest constants and
* compiled into the kernel, but it is still not ideal when dealing with
* multiprocessor configuration in which each board as a different memory
* map. A better place for defining these symbols might be the makefiles.
* Consideration should also be given to developing an approach in which
* the kernel and the application can be linked and burned into ROM
* independently of each other.
*/
unsigned char *_HeapStart =
(char*)BSP_Configuration.work_space_start
+ BSP_Configuration.work_space_size;
extern unsigned char _HeapEnd[];
bsp_libc_init( _HeapStart, _HeapEnd - _HeapStart, 0 );
#ifdef RTEMS_DEBUG
rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
#endif
}
/*
* bsp_start()
*
* Board-specific initialization code. Called from the generic boot_card()
* function defined in rtems/c/src/lib/libbsp/shared/main.c. That function
* does some of the board independent initialization. It is called from the
* SS555 entry point _start() defined in
* rtems/c/src/lib/libbsp/powerpc/ss555/startup/start.S
*
* _start() has set up a stack, has zeroed the .bss section, has set up the
* .data section from contents stored in ROM, has turned off interrupts,
* and placed the processor in the supervisor mode. boot_card() has left
* the processor in that state when bsp_start() was called.
*
* Input parameters: NONE
*
* Output parameters: NONE
*
* Return values: NONE
*/
void bsp_start(void)
{
extern char _WorkspaceBase[];
ppc_cpu_id_t myCpu;
ppc_cpu_revision_t myCpuRevision;
register unsigned char* intrStack;
/*
* Get CPU identification dynamically. Note that the get_ppc_cpu_type()
* function stores the result in global variables so that it can be used
* later.
*/
myCpu = get_ppc_cpu_type();
myCpuRevision = get_ppc_cpu_revision();
/*
* Initialize some SPRG registers related to irq handling
*/
intrStack = (((unsigned char*)&intrStackPtr) - CPU_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);
/*
* Install our own set of exception vectors
*/
initialize_exceptions();
/*
* 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.
*
* In this case, the memory is not malloc'ed. It is just
* "pulled from the air".
*/
BSP_Configuration.work_space_start = _WorkspaceBase;
/*
* initialize the CPU table for this BSP
*/
Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */
Cpu_table.postdriver_hook = bsp_postdriver_hook;
if( Cpu_table.interrupt_stack_size < 4 * 1024 )
Cpu_table.interrupt_stack_size = 4 * 1024;
Cpu_table.clicks_per_usec = BSP_CRYSTAL_HZ / 4 / 1000000;
Cpu_table.clock_speed = BSP_CLOCK_HZ; /* for SCI baud rate generator */
/*
* Call this in case we use TERMIOS for console I/O
*/
m5xx_uart_reserve_resources( &BSP_Configuration );
/*
* Initalize RTEMS IRQ system
*/
BSP_rtems_irq_mng_init(0);
}
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