platform.inc

开放源码实时操作系统源码.

#ifndef CYGONCE_HAL_PLATFORM_INC
#define CYGONCE_HAL_PLATFORM_INC
##=============================================================================
##
##	platform.inc
##
##	Hitachi SE7751 board assembler header file
##
##=============================================================================
#####ECOSGPLCOPYRIGHTBEGIN####
## -------------------------------------------
## This file is part of eCos, the Embedded Configurable Operating System.
## Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
##
## eCos is free software; you can redistribute it and/or modify it under
## the terms of the GNU General Public License as published by the Free
## Software Foundation; either version 2 or (at your option) any later version.
##
## eCos is distributed in the hope that it will be useful, but WITHOUT ANY
## WARRANTY; without even the implied warranty of MERCHANTABILITY or
## FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
## for more details.
##
## You should have received a copy of the GNU General Public License along
## with eCos; if not, write to the Free Software Foundation, Inc.,
## 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
##
## As a special exception, if other files instantiate templates or use macros
## or inline functions from this file, or you compile this file and link it
## with other works to produce a work based on this file, this file does not
## by itself cause the resulting work to be covered by the GNU General Public
## License. However the source code for this file must still be made available
## in accordance with section (3) of the GNU General Public License.
##
## This exception does not invalidate any other reasons why a work based on
## this file might be covered by the GNU General Public License.
##
## Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
## at http://sources.redhat.com/ecos/ecos-license/
## -------------------------------------------
#####ECOSGPLCOPYRIGHTEND####
##=============================================================================
#######DESCRIPTIONBEGIN####
##
## Author(s): 	jskov
## Contributors:jskov
## Date:	2001-07-09
## Purpose:	Hitachi SE7751 platform startup
## Description:	This file contains various definitions and macros that are
##              useful for writing assembly code for the Hitachi SE7751
##              board.
## Usage:
##		#include <cyg/hal/platform.inc>
##		...
##		
##
######DESCRIPTIONEND####
##
##=============================================================================

#include <pkgconf/hal.h>

#include <cyg/hal/sh_offsets.inc>
#include <cyg/hal/sh_regs.h>

#------------------------------------------------------------------------------
# Hardware initialization.

#define END   0
#define INT8  1
#define INT16 2
#define INT32 3
#define DELAY 4
	
        .macro  hal_hardware_init
        mova     init_table,r0
        mov      r0,r3
1:      mov.l    @r3+,r0                // Data type
        cmp/eq   #END,r0	        // End of table
        bf       0f
	bra      9f
	 nop
0:	cmp/eq   #INT8,r0
	bf       2f
	// 8 bit data
        mov.l    @r3+,r0                // addr
        mov.l    @r3+,r1                // data
        bra      1b
         mov.b   r1,@r0
2:	cmp/eq   #INT16,r0
	bf       3f
	// 16 bit data
        mov.l    @r3+,r0                // addr
        mov.l    @r3+,r1                // data
        bra      1b
         mov.w   r1,@r0
3:	cmp/eq   #INT32,r0
	bf       4f
	// 32 bit data
        mov.l    @r3+,r0                // addr
        mov.l    @r3+,r1                // data
        bra      1b
         mov.l   r1,@r0
4:	cmp/eq   #DELAY,r0
	bf       6f
	// delay
	mov.l    @r3+,r0                // count
5:	cmp/eq   #0,r0
	bt       1b
        bra      5b
         add     #-1,r0
6:	bra      1b
	 nop

        .align  2
init_table:
        .long   INT16, CYGARC_REG_WTCSR, 0xA502
        .long   INT16, CYGARC_REG_WTCNT, 0x5A00
        .long   INT16, CYGARC_REG_FRQCR, CYGARC_REG_FRQCR_INIT
	.long   INT32, CYGARC_REG_BCR1, 0x00080008
        .long   INT16, CYGARC_REG_BCR2, 0x2ffc
        .long   INT32, CYGARC_REG_WCR1, 0x02770771
        .long   INT32, CYGARC_REG_WCR2, 0x7ffe4fe7
        .long   INT32, CYGARC_REG_WCR3, 0x01777771
	.long	INT16, CYGARC_REG_PCR,   0x0000
	.long	INT16, CYGARC_REG_RTCNT, 0xa500
	.long	INT16, CYGARC_REG_RTCOR, 0xa506
	.long	INT16, CYGARC_REG_RFCR,  0xa400
        .long   INT32, CYGARC_REG_MCR,   0x100901b4
	.long	INT8, 0xff940088, 0x00  // CS3 area SDRAM mode register
	.long	INT16, CYGARC_REG_RTCSR, 0xa508
	.long	DELAY, 100
	.long   INT32, CYGARC_REG_MCR,   0x500901b4
	.long	INT8, 0xff940088, 0x00  // CS3 area SDRAM mode register
	.long	INT16, CYGARC_REG_RTCSR, 0xa518
	.long	INT32, CYGARC_REG_PCTRA, 0x00000000
	.long	INT32, CYGARC_REG_PCTRB, 0x00000000
	.long	INT16, CYGARC_REG_GPIOIC, 0x0000
        .long   END
9:	
        .endm

#------------------------------------------------------------------------------
# Monitor initialization.

#ifndef CYGPKG_HAL_SH_MON_DEFINED

#if	!defined(CYG_HAL_STARTUP_RAM) ||		\
	(	defined(CYG_HAL_STARTUP_RAM) &&		\
		!defined(CYGSEM_HAL_USE_ROM_MONITOR))

	# If we are not starting up from RAM, or we are starting in
	# RAM and NOT using a ROM monitor, initialize the VSR table.

	.macro	hal_mon_init
        mov.l   $hal_vsr_table,r3
	# Write exception vectors
	mov.l   $cyg_hal_default_exception_vsr,r4
	mov     #CYGNUM_HAL_VSR_EXCEPTION_COUNT,r5
1:	mov.l   r4,@r3
        add     #4,r3
	dt	r5
	bf	1b
	# Write interrupt vector
	mov.l   $cyg_hal_default_interrupt_vsr,r4
	mov.l   $hal_vsr_table,r3
	add	#CYGNUM_HAL_VECTOR_INTERRUPT*4,r3
	mov.l   r4,@r3
	bra	2f
	 nop
        .align  2

	SYM_PTR_REF(cyg_hal_default_exception_vsr)
	SYM_PTR_REF(cyg_hal_default_interrupt_vsr)
	SYM_PTR_REF(hal_vsr_table)
2:
	.endm

#elif defined(CYG_HAL_STARTUP_RAM) && defined(CYGSEM_HAL_USE_ROM_MONITOR)

	# Initialize the VSR table entries
	# We only take control of the interrupt vector,
	# the rest are left to the ROM for now...

	.macro	hal_mon_init
	# Write interrupt vector
	mov.l   $hal_vsr_table,r3
	mov.l   $cyg_hal_default_interrupt_vsr,r4
	add	#CYGNUM_HAL_VECTOR_INTERRUPT*4,r3
	mov.l   r4,@r3
	bra	2f
	 nop
        .align  2

	SYM_PTR_REF(cyg_hal_default_interrupt_vsr)
	SYM_PTR_REF(hal_vsr_table)
2:
	.endm

#else

	.macro	hal_mon_init
	.endm

#endif


#define CYGPKG_HAL_SH_MON_DEFINED

#endif // CYGPKG_HAL_SH_MON_DEFINED

#endif // CYGONCE_HAL_PLATFORM_INC