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phoenix |
//==========================================================================
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//
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// hal_boot.c
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//
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// SPARClite Architecture specific interrupt dispatch tables
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//
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//==========================================================================
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//####ECOSGPLCOPYRIGHTBEGIN####
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// -------------------------------------------
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// This file is part of eCos, the Embedded Configurable Operating System.
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// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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//
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// eCos is free software; you can redistribute it and/or modify it under
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// the terms of the GNU General Public License as published by the Free
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// Software Foundation; either version 2 or (at your option) any later version.
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//
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// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with eCos; if not, write to the Free Software Foundation, Inc.,
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// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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//
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// As a special exception, if other files instantiate templates or use macros
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// or inline functions from this file, or you compile this file and link it
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// with other works to produce a work based on this file, this file does not
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// by itself cause the resulting work to be covered by the GNU General Public
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// License. However the source code for this file must still be made available
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// in accordance with section (3) of the GNU General Public License.
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//
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// This exception does not invalidate any other reasons why a work based on
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// this file might be covered by the GNU General Public License.
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//
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// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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// at http://sources.redhat.com/ecos/ecos-license/
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// -------------------------------------------
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//####ECOSGPLCOPYRIGHTEND####
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//==========================================================================
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//#####DESCRIPTIONBEGIN####
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//
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// Author(s): hmt
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// Contributors: hmt
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// Date: 1998-12-10
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// Purpose: Interrupt handler tables for SPARClite.
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//
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//####DESCRIPTIONEND####
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//
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//==========================================================================
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#include <pkgconf/hal.h>
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#include <cyg/infra/cyg_type.h>
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/*------------------------------------------------------------------------*/
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/* calling this is our raison d'etre: */
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extern void cyg_start( void );
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/*------------------------------------------------------------------------*/
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/* data copy and bss zero functions */
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typedef void (CYG_ROM_ADDRESS)(void);
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#ifdef CYG_HAL_STARTUP_ROM
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void hal_copy_data(void)
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{
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extern char __ram_data_start;
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extern char __ram_data_end;
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extern CYG_ROM_ADDRESS __rom_data_start;
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long *p = (long *)&__ram_data_start;
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long *q = (long *)&__rom_data_start;
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while( p <= (long *)&__ram_data_end )
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*p++ = *q++;
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}
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#endif
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void hal_zero_bss(void)
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{
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extern CYG_ROM_ADDRESS __bss_start;
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extern CYG_ROM_ADDRESS __bss_end;
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register long long zero = 0;
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register long long *end = (long long *)&__bss_end;
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register long long *p = (long long *)&__bss_start;
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while( p <= end )
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*p++ = zero;
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}
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#ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
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cyg_bool cyg_hal_stop_constructors;
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#endif
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void
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cyg_hal_invoke_constructors (void)
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{
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typedef void (*pfunc) (void);
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extern pfunc __CTOR_LIST__[];
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extern pfunc __CTOR_END__[];
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#ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
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static pfunc *p = &__CTOR_END__[-1];
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cyg_hal_stop_constructors = 0;
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for (; p >= __CTOR_LIST__; p--) {
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(*p) ();
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if (cyg_hal_stop_constructors) {
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p--;
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break;
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}
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}
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#else
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pfunc *p;
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for (p = &__CTOR_END__[-1]; p >= __CTOR_LIST__; p--)
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(*p) ();
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#endif
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}
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// Override any __gccmain the compiler might generate. We don't want
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// constructors to be called twice.
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void __gccmain(void) {}
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/*------------------------------------------------------------------------*/
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/* CYG_HAL_START - pre-main-entrypoint */
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#ifdef CYGPKG_HAL_SPARCLITE_SLEB
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#define SLEB_LED (*(volatile char *)(0x02000003))
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#define LED( _x_ ) SLEB_LED = (char)(0xff & ~(_x_))
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#else
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#define LED( _x_ ) CYG_EMPTY_STATEMENT
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#endif
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extern void hal_board_prestart( void );
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extern void hal_board_poststart( void );
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// This is called with traps enabled, but interrupts masked out:
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// Be sure to enable them in hal_board_poststart() at the latest.
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void cyg_hal_start( void )
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{
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/* Board specific prestart that's best done in C */
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hal_board_prestart();
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LED( 0xd0 );
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#ifdef CYG_HAL_STARTUP_ROM
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/* Copy data from ROM to RAM */
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hal_copy_data();
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#endif
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LED( 0xd4 );
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/* Zero BSS */
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hal_zero_bss();
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LED( 0xd8 );
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/* Call constructors */
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cyg_hal_invoke_constructors();
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LED( 0xdc );
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/* Board specific late startup that's best done in C */
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hal_board_poststart();
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LED( 0xf8 );
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/* Call cyg_start */
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cyg_start(); /* does not return */
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}
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// EOF hal_boot.c
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