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##=============================================================================

##

##      csb281.S

##

##      CSB281 board hardware setup

##

##=============================================================================

#####ECOSGPLCOPYRIGHTBEGIN####

## -------------------------------------------

## This file is part of eCos, the Embedded Configurable Operating System.

## Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

## Copyright (C) 2002, 2003 Gary Thomas

##

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## the terms of the GNU General Public License as published by the Free

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## FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

## for more details.

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## You should have received a copy of the GNU General Public License along

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## 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

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## -------------------------------------------

#####ECOSGPLCOPYRIGHTEND####

##=============================================================================

#######DESCRIPTIONBEGIN####

##

## Author(s):   gthomas

## Contributors:hmt

## Date:        2002-07-22

## Purpose:     CSB281 board hardware setup

## Description: This file contains any code needed to initialize the

##              hardware on a Cogent CSB281 (PowerPC 8245) board.

##

######DESCRIPTIONEND####

##

##=============================================================================

#include 

#include 

#include 

#include 

#include                /* register symbols et al */

#include                /* on-chip resource layout, special */

#------------------------------------------------------------------------------

// LED macro uses r23, r25: r4 left alone

#if 0

#define LED( x ) \

        lwi     r25,0xFA100018;         \

        lwi     r23,(x);                \

        stb     r23,0(r25)

#else

#define LED(x)

#endif

FUNC_START(_led)

        lwi     r25,0xFF000000

        lwz     r26,0(r25)

        ori     r26,r26,0x18

        stw     r26,0(r25)

        blr

FUNC_END(_led)

#------------------------------------------------------------------------------

FUNC_START( hal_hardware_init )

        // Basic hardware initialization

        mflr    r31

        bl      10f     // Gets position independent address of table

HW_init:

#ifndef CYG_HAL_STARTUP_RAM

        .long   0x80000080, 0x00000000  // MSAR1 - SDRAM Bank 0 start

        .long   0x80000090, 0x0000003F  // MEAR1 - SDRAM Bank 0 end

        .long   0x800000A0, 0x00000001  // MBEN1 - SDRAM Bank 1 enable

        .long   0x800000F0, 0x88000000  // MCCR1 - SDRAM control (no GO)

        .long   0x800000F4, 0x1E00023C  // MCCR2 - Timing

        .long   0x800000F8, 0xB6000000  // MCCR3

        .long   0x800000FC, 0x35B03334  // MCCR4

        .long   0x800000F0, 0x88080000  // MCCR1 - SDRAM control (GO)

        .long   0x800000D0, 0xB4000000  // ERCR1

        .long   0x800000D4, 0xBCF7B1E3  // ERCR2

        .long   0x800000D8, 0x7000000D  // RCS2  - 0x70000000..0x71FFFFFF

        .long   0x800000DC, 0x7800000D  // RCS3  - 0x78000000..0x79FFFFFF

#endif

        .long   0x80000078, _CSB281_EUMBBAR  // EUMBBAR - machine registers

        .long   0x800000A8, 0xFF141110  // PICR1 - RCS0 local, Big Endian, DEC/TB

        .long   0x800000AC, 0x08000000  // PICR2

        .long   0

10:     nop

        mflr    r3              // Pointer to initialization table

        subi    r3,r3,4

        lwi     r4,_CSB281_PCI_CONFIG_ADDR

        lwi     r5,_CSB281_PCI_CONFIG_DATA

20:     lwzu    r6,4(r3)        // Register address

        lwzu    r7,4(r3)        // Data

        cmpi    0,r6,0

        beq     30f             // end of table?

        stwbrx  r6,0,r4         // Set address

        stwbrx  r7,0,r5         // value

        b       20b

30:     mtlr    r31

        # set the decrementer to maxint

        lwi     r2,0

        not     r2,r2

        mtdec   r2

#ifdef CYG_HAL_STARTUP_ROMRAM

        // Copy image from ROM to RAM

        mflr    r3

        lwi     r4,0xFF000000

        lwi     r5,0x00FFFFFF   // ROM/FLASH base

        and     r3,r3,r5        // segment relative

        lwi     r6,_hal_hardware_init_done

        mtlr    r6

        sub     r6,r3,r6        // Absolute address

        add     r6,r6,r4        // FLASH address

        lwi     r7,0            // where to copy to

        lwi     r8,__ram_data_end

10:     lwz     r5,0(r6)

        stw     r5,0(r7)

        addi    r6,r6,4

        addi    r7,r7,4

        cmplw   r7,r8

        bne     10b

#endif

        blr

FUNC_END( hal_hardware_init )

#------------------------------------------------------------------------------

# end of csb281.S