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#ifndef CYGONCE_HAL_PLATFORM_SETUP_H

#define CYGONCE_HAL_PLATFORM_SETUP_H

/*=============================================================================

//

//      hal_platform_setup.h

//

//      Platform specific support for HAL (assembly code)

//

//=============================================================================

// ####ECOSGPLCOPYRIGHTBEGIN####

// -------------------------------------------

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

// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2009 Free Software Foundation, 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.,

// 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 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 v2.

//

// This exception does not invalidate any other reasons why a work based

// on this file might be covered by the GNU General Public License.

// -------------------------------------------

// ####ECOSGPLCOPYRIGHTEND####

//=============================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):   gthomas

// Contributors:gthomas, tdrury, nickg

// Date:        2001-07-12

// Purpose:     AT91/EB55 platform specific support routines

// Description:

// Usage:       #include <cyg/hal/hal_platform_setup.h>

//

//####DESCRIPTIONEND####

//

//===========================================================================*/

#include <cyg/hal/var_io.h>

//===========================================================================*/

        .macro  _led_init

        ldr     r0,=AT91_PIOB

        ldr     r1,=0x0000FF00

        str     r1,[r0,#AT91_PIO_PER]

        str     r1,[r0,#AT91_PIO_OER]

        _led    0

        .endm

        .macro _led y

        ldr     r0,=AT91_PIOB

        ldr     r1,=0x0000FF00

        str     r1,[r0,#AT91_PIO_SODR]

        ldr     r1,=(\y<<8)

        str     r1,[r0,#AT91_PIO_CODR]

#if 0   

        mov     r0,#0x00100000

9:      sub     r0,r0,#1

        cmp     r0,#0

        bne     9b

#endif        

        .endm

        .macro  _pclock_init

        ldr     r0,=AT91_PMC            // Power saving interface

        ldr     r1,=0xFFFFFFFF          // Enable all peripheral [clocks]

        str     r1,[r0,#AT91_PMC_PCER]

        .endm

        .macro  _pio_init

        ldr     r0,=AT91_PIOA           // Disable PIO (so peripherals can use bits)

        ldr     r1,=(0x3f<<14)          // Enable UARTS 0/1 to use pins

        str     r1,[r0,#AT91_PIO_PDR]

        .endm

#define CYGHWR_LED_MACRO _led \x

//===========================================================================*/

#if defined(CYG_HAL_STARTUP_ROM) || defined(CYG_HAL_STARTUP_ROMRAM)

#define AT91_PMC_CGMR_INIT0     (AT91_PMC_CGMR_MOSC_XTAL        |       \

                                AT91_PMC_CGMR_MOSC_ENA          |       \

                                AT91_PMC_CGMR_OSC_CNT(47))

#define AT91_PMC_CGMR_INIT1     (AT91_PMC_CGMR_INIT0            |       \

                                AT91_PMC_CGMR_CSS_MOSC)

#define AT91_PMC_CGMR_INIT2     (AT91_PMC_CGMR_INIT1            |       \

                                AT91_PMC_CGMR_PLL_MUL(1)        |       \

                                AT91_PMC_CGMR_PLL_CNT(255))

#define AT91_PMC_CGMR_INIT3     (AT91_PMC_CGMR_INIT0            |       \

                                AT91_PMC_CGMR_PLL_MUL(1)        |       \

                                AT91_PMC_CGMR_PLL_CNT(3)        |       \

                                AT91_PMC_CGMR_CSS_PLL)

        .macro  _setup

        _led_init

        // Change system frequency from 32kHz to 32MHz.

        // First enable the master oscillator to run at 16MHz from

        // external crystal.

        ldr     r2,=AT91_PMC

        ldr     r3,=AT91_PMC_CGMR_INIT0

        str     r3,[r2,#AT91_PMC_CGMR]

        // Wait for MOSC to stabilize.

        mov     r4,#AT91_PMC_SR_MOSCS

1:

        ldr     r3,[r2,#AT91_PMC_SR]

        and     r3,r4,r3

        cmp     r3,r4 //#AT91_PMC_SR_MOSCS

        bne     1b

        // Now switch CPU clock to use master oscillator, after this we

        // should be running at 16MHz.

        ldr     r3,=AT91_PMC_CGMR_INIT1

        str     r3,[r2,#AT91_PMC_CGMR]

        // Now enable PLL to run at twice MOSC frequency

        ldr     r3,=AT91_PMC_CGMR_INIT2

        str     r3,[r2,#AT91_PMC_CGMR]

        // Wait for PLL to stabilize

        mov     r4,#AT91_PMC_SR_LOCK

2:

        ldr     r3,[r2,#AT91_PMC_SR]

        and     r3,r4,r3

        cmp     r3,r4

        bne     2b

        // Finally, switch CPU clock from MOSC to PLL 

        ldr     r3,=AT91_PMC_CGMR_INIT3

        str     r3,[r2,#AT91_PMC_CGMR]

        // All done, we should be running at 32MHz now

        ldr     r10,=_InitMemory        // Initialize memory controller

        movs    r0,pc,lsr #20           // If ROM startup, PC < 0x100000

        moveq   r10,r10,lsl #12         //   mask address to low 20 bits

        moveq   r10,r10,lsr #12

        ldmia   r10!,{r0-r9,r11-r12}    // Table of initialization constants

#if defined(CYG_HAL_STARTUP_ROMRAM)

        ldr     r10,=0x0000FFFF

        and     r12,r12,r10

        ldr     r10,=0x01000000

        orr     r12,r12,r10

#endif

        stmia   r11!,{r0-r9}            // Write to controller

        mov     pc,r12                  // Change address space, break pipeline

_InitMemory:

        .long   0x01002529  // 0x01000000, 16MB,  2 cycles  after transfer, 16-bit, 6 wait states

        .long   0x02002121  // 0x02000000, 16MB,  0 cycles after transfer, 16-bit, 1 wait state

        .long   0x20000000  // unused

        .long   0x30000000  // unused

        .long   0x40000000  // unused

        .long   0x50000000  // unused

        .long   0x60000000  // unused

        .long   0x70000000  // unused

        .long   0x00000001  // REMAP command

        .long   0x00000000  // Standard read protocol

        .long   AT91_EBI    // External Bus Interface address

        .long   10f         // address where to jump

10:

#if defined(CYG_HAL_STARTUP_ROMRAM)

        ldr     r0,=0x01000000          // Relocate FLASH/ROM to on-chip RAM

        ldr     r1,=0x02000000          // RAM base & length

        ldr     r2,=0x02010000

20:     ldr     r3,[r0],#4

        str     r3,[r1],#4

        cmp     r1,r2

        bne     20b

        ldr     r0,=30f

        mov     pc,r0

30:

#endif

        _pclock_init

        _pio_init

        .endm

#define CYGSEM_HAL_ROM_RESET_USES_JUMP

#else

        .macro  _setup

        _led_init

        _pclock_init

        _pio_init

        .endm

#endif

#define PLATFORM_SETUP1     _setup

//-----------------------------------------------------------------------------

// end of hal_platform_setup.h

#endif // CYGONCE_HAL_PLATFORM_SETUP_H