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

//

//      plf_misc.c

//

//      HAL platform miscellaneous functions

//

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

//####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.

//

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// 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):    dmoseley (based on the original by nickg)

// Contributors: nickg, jlarmour, dmoseley

// Date:         2000-08-11

// Purpose:      HAL miscellaneous functions

// Description:  This file contains miscellaneous functions provided by the

//               HAL.

//

//####DESCRIPTIONEND####

//

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

#include <pkgconf/hal.h>

#include <cyg/infra/cyg_type.h>         // Base types

#include <cyg/infra/cyg_trac.h>         // tracing macros

#include <cyg/infra/cyg_ass.h>          // assertion macros

#include <cyg/hal/hal_arch.h>           // architectural definitions

#include <cyg/hal/hal_intr.h>           // Interrupt handling

#include <cyg/hal/hal_cache.h>          // Cache handling

#include <cyg/hal/hal_if.h>

#include <cyg/hal/plf_io.h>

const cyg_uint8 hal_diag_digits[] = {

        0x81, // 0

        0xf3, // 1

        0x49, // 2

        0x61, // 3

        0x33, // 4

        0x25, // 5

        0x05, // 6

        0xf1, // 7

        0x01, // 8

        0x21, // 9

        0x11, // A

        0x07, // B

        0x8d, // C

        0x43, // D

        0x0d, // E

        0x1d  // F

};

const char hal_diag_hex_digits[] = "0123456789ABCDEF";

cyg_uint32 hal_led_old_display = 0x5f17ffff; /* "rh  " */

/*------------------------------------------------------------------------*/

/* LED support                                                            */

cyg_uint8 cyg_hal_plf_led_val(CYG_WORD hexdig)

{

    return hal_diag_digits[(hexdig & 0xF)];

}

/*------------------------------------------------------------------------*/

#include CYGHWR_MEMORY_LAYOUT_H

#if defined(CYGPKG_CYGMON)

extern unsigned long cygmon_memsize;

#endif

void hal_platform_init(void)

{

    *(cyg_uint8*)(&hal_led_old_display) = cyg_hal_plf_led_val(8);

    HAL_WRITE_UINT32(HAL_LED_ADDRESS,hal_led_old_display);

#if defined(CYG_HAL_STARTUP_ROM)

    // Note that the hardware seems to come up with the

    // caches containing random data. Hence they must be

    // invalidated before being enabled.

    // However, we only do this if we are in ROM. If we are

    // in RAM, then we leave the caches in the state chosen

    // by the ROM monitor. If we enable them when the monitor

    // is not expecting it, we can end up breaking things if the

    // monitor is not doing cache flushes.

    HAL_ICACHE_INVALIDATE_ALL();

    HAL_ICACHE_ENABLE();

    HAL_DCACHE_INVALIDATE_ALL();

    HAL_DCACHE_ENABLE();

#endif

#if defined(CYGPKG_CYGMON)

    cygmon_memsize = 16 * 1024 * 1024 - 0x200;  // 16 MB - 0x200 (for _hal_vsr_table and _hal_virtual_vector_table)

#endif

    // Set up eCos/ROM interfaces

    hal_if_init();

#if defined(CYGPKG_KERNEL)                      && \

    defined(CYGFUN_HAL_COMMON_KERNEL_SUPPORT)   && \

    defined(CYGSEM_HAL_USE_ROM_MONITOR_GDB_stubs)

    {

        extern CYG_ADDRESS hal_virtual_vector_table[32];

        extern void patch_dbg_syscalls(void * vector);

        patch_dbg_syscalls( (void *)(&hal_virtual_vector_table[0]) );

    }

#endif    

#if defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT)

    {

        static void hal_ctrlc_isr_init(void);

        hal_ctrlc_isr_init();

    }

#endif    

    // Make sure the TBR points at the base of ROM

#if 0

    {

        #define TBR 0xC0000024

        cyg_uint32 TBR_val;

        HAL_READ_UINT32(TBR, TBR_val);

        TBR_val = (TBR_val & 0x00FFFFFF) | 0x90000000; //(CYGMEM_REGION_rom & 0xFF000000);

        HAL_WRITE_UINT32(TBR, TBR_val);

    }

#endif

    // Make sure the MTBR points at the base of ROM

#if 0

    {

        #define mTBR 0xC0000028

        cyg_uint32 mTBR_val;

        HAL_READ_UINT32(mTBR, mTBR_val);

        mTBR_val = (mTBR_val & 0x00FFFFFF) | (CYGMEM_REGION_rom & 0xFF000000);

        HAL_WRITE_UINT32(mTBR, mTBR_val);

    }

#endif

}

/*------------------------------------------------------------------------*/

/* Functions to support the detection and execution of a user provoked    */

/* program break. These are usually called from interrupt routines.       */

/*------------------------------------------------------------------------*/

/* Control C ISR support                                                  */

#if defined(CYGDBG_HAL_DEBUG_GDB_CTRLC_SUPPORT)

#if CYGHWR_HAL_MN10300_AM33_STB_GDB_PORT == 0

// We use serial0 on AM33

#define SERIAL_CR       ((volatile cyg_uint16 *)0xd4002000)

#define SERIAL_ICR      ((volatile cyg_uint8 *) 0xd4002004)

#define SERIAL_TXR      ((volatile cyg_uint8 *) 0xd4002008)

#define SERIAL_RXR      ((volatile cyg_uint8 *) 0xd4002009)

#define SERIAL_SR       ((volatile cyg_uint16 *)0xd400200c)

// Timer 1 provided baud rate divisor

#define TIMER_MD       ((volatile cyg_uint8 *)0xd4003000)

#define TIMER_BR       ((volatile cyg_uint8 *)0xd4003010)

#define TIMER_CR       ((volatile cyg_uint8 *)0xd4003020)

#define SIO_LSTAT_TRDY  0x20

#define SIO_LSTAT_RRDY  0x10

#else

#error Unsupported GDB port

#endif

struct Hal_SavedRegisters *hal_saved_interrupt_state;

static void hal_ctrlc_isr_init(void)

{

//    cyg_uint16 cr;

//    HAL_READ_UINT16( SERIAL_CR, cr );

//    cr |= LCR_RXE;

//    HAL_WRITE_UINT16( SERIAL_CR, cr );

    HAL_INTERRUPT_SET_LEVEL( CYGHWR_HAL_GDB_PORT_VECTOR, 4 );

    HAL_INTERRUPT_UNMASK( CYGHWR_HAL_GDB_PORT_VECTOR );

}

cyg_uint32 hal_ctrlc_isr(CYG_ADDRWORD vector, CYG_ADDRWORD data)

{

    char c;

    cyg_uint16 sr;

    HAL_INTERRUPT_ACKNOWLEDGE( CYGHWR_HAL_GDB_PORT_VECTOR );

    HAL_READ_UINT16( SERIAL_SR, sr );

    if( sr & SIO_LSTAT_RRDY )

    {

        HAL_READ_UINT8( SERIAL_RXR, c);

        if( cyg_hal_is_break( &c , 1 ) )

            cyg_hal_user_break( (CYG_ADDRWORD *)hal_saved_interrupt_state );

    }

    return 1;

}

#endif

void hal_arch_funcall_new_stack(void (*func)(void), void* stack_base, cyg_uint32 stack_size)

{

    register cyg_uint32 stack_top = (cyg_uint32)stack_base + stack_size;

    register cyg_uint32 old_stack;

    asm volatile (" mov sp, %0" : "=r" (old_stack) : );

    asm volatile (" mov %0, sp" : : "r" (stack_top) );

    func();

    asm volatile (" mov %0, sp" : : "r" (old_stack) );

}

/*------------------------------------------------------------------------*/

/* Syscall support                                                        */

#ifdef CYGPKG_CYGMON

// Cygmon provides syscall handling for this board

#include <cyg/hal/hal_stub.h>

int __get_syscall_num (void)

{

    return SIGSYS;

}

#endif

/*------------------------------------------------------------------------*/

/* flash write-protect support                                            */

int plf_flash_query_soft_wp(void *addr, int len)

{

    if (((unsigned long)addr & 0xFC000000UL) == 0x84000000UL)

        return !(*(cyg_uint8*)0xA6FA0000 & 0x02); // system flash

    else

        return 0; // boot prom

}

/*------------------------------------------------------------------------*/

/* End of plf_misc.c                                                      */