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

//

//      hal_diag.c

//

//      HAL diagnostic output code

//

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

// ####ECOSGPLCOPYRIGHTBEGIN####

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

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

// Copyright (C) 1998, 1999, 2000, 2001, 2002 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):   larsi

// Contributors:larsi

// Date:        2006-07-26

// Purpose:     HAL diagnostic output

// Description: Implementations of HAL diagnostic output support.

//

//####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>

#include <cyg/hal/hal_diag.h>

#include <cyg/hal/hal_intr.h>

#include <cyg/hal/hal_io.h>

#include <cyg/hal/hal_misc.h>

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

//#define CYG_KERNEL_DIAG_LCD

#define CYG_KERNEL_DIAG_SERIAL0 // For ROM start but see immediately below:

#if defined(CYGSEM_HAL_USE_ROM_MONITOR_CygMon)

#undef CYG_KERNEL_DIAG_SERIAL0

#undef CYG_KERNEL_DIAG_LCD

#define CYG_KERNEL_DIAG_CYGMON

#define CYG_KERNEL_DIAG_GDB

#endif

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

#if defined(CYG_KERNEL_DIAG_SERIAL0) || defined(CYG_KERNEL_DIAG_CYGMON)

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

// LED diag function

/*

void hal_diag_init_led(){

// we only init the first 4 leds here

        asm volatile(

        "ldi:8  #0xf,   r4;\n"

        "ldi:20 #CYG_HAL_FR30_MB91360_DDRJ,     r5;\n"

        "stb    r4,     @r5;\n"

        "ldi:20 #CYG_HAL_FR30_MB91360_PFRJ, r5;\n"

        "stb    r4,     @r5;\n"

        : : :"r4", "r5"

    );

}

*/

// static cyg_uint8 leds = 0;

void hal_diag_init(void){

    // PJ2(SCK0) & PJ1(SOT0) output, PJ0(SIN0) input

    HAL_WRITE_UINT8(CYG_HAL_FR30_MB91301_DDRJ, 0x6);

    // PJ2(SCK0) & PJ1(SOT0) & PJ0(SIN0) to peripheral operation

    HAL_WRITE_UINT8(CYG_HAL_FR30_MB91301_PFRJ, 0x7);

    // set up U-Timer

    HAL_WRITE_UINT8(CYG_HAL_FR30_MB91301_UTIMC0, 0x02);

    // 115200 bps

    HAL_WRITE_UINT16(CYG_HAL_FR30_MB91301_UTIMR0, 0x7);

    // setup UART

    HAL_WRITE_UINT8(CYG_HAL_FR30_MB91301_SCR0, 0x13);

    HAL_WRITE_UINT8(CYG_HAL_FR30_MB91301_SMR0, 0x30);

}

void hal_diag_led(cyg_uint8 leds)

{

    HAL_WRITE_UINT8(CYG_HAL_FR30_MB91301_PDRG, leds);

}

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

void hal_diag_write_char_serial0( char c)

{

    cyg_uint8 ssr;

    do

    {

        HAL_READ_UINT8( CYG_HAL_FR30_MB91301_SSR0 , ssr );

    } while (!(ssr & BIT3));

    HAL_WRITE_UINT8( CYG_HAL_FR30_MB91301_SODR0, c );

}

void hal_diag_write_hex_serial0(unsigned int c)

{

    unsigned char chr;

    int i;

    hal_diag_write_char_serial0('0');

    hal_diag_write_char_serial0('x');

    for(i = 28; i >= 0; i = i - 4)

    {

        chr = (c >> i) & 0xf;

        if (chr >= 10) chr = chr + 55;   /* for A-F */

        else  chr = chr + 48;  /* for 0-9 */

        hal_diag_write_char_serial0(chr);

    }

    hal_diag_write_char_serial0('\n');

    hal_diag_write_char_serial0('\r');

}

void hal_diag_drain(void)

{

    cyg_uint8 ssr;

        do

    {

        HAL_READ_UINT8( CYG_HAL_FR30_MB91301_SSR0 , ssr );

    } while (!(ssr & BIT3));

}

void hal_diag_read_char_serial0(char *c)

{

    cyg_uint8 ssr;

    do

    {

        HAL_READ_UINT8( CYG_HAL_FR30_MB91301_SSR0 , ssr );

    } while (!(ssr & BIT4));

    HAL_READ_UINT8( CYG_HAL_FR30_MB91301_SIDR0, *c );

}

#if defined(CYG_KERNEL_DIAG_CYGMON)

void hal_diag_dumb_write_char(char c)

#else

void hal_diag_write_char(char c)

#endif

{

#ifdef CYG_KERNEL_DIAG_GDB

    static char line[100];

    static int pos = 0;

//    register volatile cyg_uint16 *volatile tty_status = SERIAL1_SR;    

    // No need to send CRs

    if( c == '\r' ) return;

    line[pos++] = c;

    if( c == '\n' || pos == sizeof(line) )

    {

        // Disable interrupts. This prevents GDB trying to interrupt us

        // while we are in the middle of sending a packet. The serial

        // receive interrupt will be seen when we re-enable interrupts

        // later.

        CYG_INTERRUPT_STATE oldstate;

        HAL_DISABLE_INTERRUPTS(oldstate);

        while(1)

        {

            static char hex[] = "0123456789ABCDEF";

            cyg_uint8 csum = 0;

            int i;

            char c1;

            hal_diag_write_char_serial0('$');

            hal_diag_write_char_serial0('O');

            csum += 'O';

            for( i = 0; i < pos; i++ )

            {

                char ch = line[i];

                char h = hex[(ch>>4)&0xF];

                char l = hex[ch&0xF];

                hal_diag_write_char_serial0(h);

                hal_diag_write_char_serial0(l);

                csum += h;

                csum += l;

            }

            hal_diag_write_char_serial0('#');

            hal_diag_write_char_serial0(hex[(csum>>4)&0xF]);

            hal_diag_write_char_serial0(hex[csum&0xF]);

            hal_diag_read_char_serial0( &c1 );

            if( c1 == '+' ) break;

            {

                extern void cyg_hal_user_break(CYG_ADDRWORD *regs);

                extern cyg_bool cyg_hal_is_break(char *buf, int size);

                if( cyg_hal_is_break( &c1 , 1 ) )

                    cyg_hal_user_break( NULL );

            }

            break;

        }

        pos = 0;

        // Wait for all data from serial line to drain

        // and clear ready-to-send indication.

        hal_diag_drain_serial0();

        // And re-enable interrupts

        HAL_RESTORE_INTERRUPTS( oldstate );

    }

#else

    hal_diag_write_char_serial0(c);

#endif    

}

void hal_diag_read_char(char *c)

{

    for(;;)

    {

#if defined(CYG_KERNEL_DIAG_GDB) && defined(CYGSEM_HAL_USE_ROM_MONITOR)

        typedef void rom_read_fn(char *c);

        rom_read_fn *fn = ((rom_read_fn **)0x80000100)[62];

        fn(c);

#else    

        hal_diag_read_char_serial0(c);

#endif    

#if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)

        if( *c == 3 )

        {

            // Ctrl-C: breakpoint.

            extern void breakpoint(void);

            breakpoint();

            continue;

        }

#elif defined(CYGSEM_HAL_USE_ROM_MONITOR)

        if( *c == 3 )

        {

            // Ctrl-C: breakpoint.

//                HAL_BREAKPOINT(_breakinst);

            typedef void bpt_fn(void);

            bpt_fn *bfn = ((bpt_fn **)0x80000100)[61];

            bfn();

            continue;

        }

#endif

        break;

    }

}

#endif // defined(CYG_KERNEL_DIAG_SERIAL0) || defined(CYG_KERNEL_DIAG_CYGMON)

#if defined(CYG_KERNEL_DIAG_CYGMON) // only

/* This code has been imported from the BSP module. The definitions have

 * been left as-is, even though there was scope for doing more, to avoid

 * too much drift from the original sources

 */

struct bsp_comm_procs {

    void *ch_data;

    void (*__write)(void *ch_data, const char *buf, int len);

    int  (*__read)(void *ch_data, char *buf, int len);

    void (*__putc)(void *ch_data, char ch);

    int  (*__getc)(void *ch_data);

    int  (*__control)(void *ch_data, int func, ...);

};

// This is pointed to by entry BSP_NOTVEC_BSP_COMM_PROCS:

typedef struct {

    int  version;       /* version number for future expansion */

    void *__ictrl_table;

    void *__exc_table;

    void *__dbg_vector;

    void *__kill_vector;

    struct bsp_comm_procs *__console_procs;

    struct bsp_comm_procs *__debug_procs;

    void *__flush_dcache;

    void *__flush_icache;

    void *__cpu_data;

    void *__board_data;

    void *__sysinfo;

    int  (*__set_debug_comm)(int __comm_id);

    int  (*__set_console_comm)(int __comm_id);

    int  (*__set_serial_baud)(int __comm_id, int baud);

    void *__dbg_data;

    void (*__reset)(void);

    int  __console_interrupt_flag;

} bsp_shared_t;

/*

 * Core Exception vectors.

 */

#define BSP_EXC_INT         0

#define BSP_EXC_TLBMOD      1

#define BSP_EXC_TLBL        2

#define BSP_EXC_TLBS        3

#define BSP_EXC_ADEL        4

#define BSP_EXC_ADES        5

#define BSP_EXC_IBE         6

#define BSP_EXC_DBE         7

#define BSP_EXC_SYSCALL     8

#define BSP_EXC_BREAK       9

#define BSP_EXC_ILL        10

#define BSP_EXC_CPU        11

#define BSP_EXC_OV         12

#define BSP_EXC_TRAP       13

#define BSP_EXC_VCEI       14

#define BSP_EXC_FPE        15

#define BSP_EXC_RSV16      16

#define BSP_EXC_RSV17      17

#define BSP_EXC_RSV18      18

#define BSP_EXC_RSV19      19

#define BSP_EXC_RSV20      20

#define BSP_EXC_RSV21      21

#define BSP_EXC_RSV22      22

#define BSP_EXC_WATCH      23

#define BSP_EXC_RSV24      24

#define BSP_EXC_RSV25      25

#define BSP_EXC_RSV26      26

#define BSP_EXC_RSV27      27

#define BSP_EXC_RSV28      28

#define BSP_EXC_RSV29      29

#define BSP_EXC_RSV30      30

#define BSP_EXC_VCED       31

/* tx39 debug exception */

#define BSP_EXC_DEBUG      32

#define BSP_EXC_TLB        33

#define BSP_EXC_NMI        34

/*

 * Hack for eCos on tx39 to set an async breakpoint.

 */

#define BSP_VEC_BP_HOOK    35

#define BSP_EXC_XTLB       36

#define BSP_EXC_CACHE      37

#define BSP_MAX_EXCEPTIONS 38

/*

 * Another hack for tx39 eCos compatibility.

 */

#if defined(__CPU_R3900__)

#define BSP_VEC_MT_DEBUG   15

#else

#define BSP_VEC_MT_DEBUG   38

#endif

#define BSP_VEC_STUB_ENTRY 39

#define BSP_VEC_BSPDATA    40

#define BSP_VEC_MAGIC      41

#define BSP_VEC_IRQ_CHECK  42

#define BSP_VEC_PAD        43

#define NUM_VTAB_ENTRIES   44

#define BSP_MAGIC_VAL      0x55aa4321

#define SYS_interrupt 1000

// These vectors should be called with:

//

//  k0 - Exception Number

#define CYGMON_VECTOR_TABLE_BASE 0x80000100

#define CYGMON_VECTOR_TABLE ((CYG_ADDRESS *)CYGMON_VECTOR_TABLE_BASE)

#if 0 // UNUSED

static int

hal_bsp_set_debug_comm(int arg)

{

    bsp_shared_t *shared;

    shared = (bsp_shared_t *)

        (CYGMON_VECTOR_TABLE[ BSP_VEC_BSPDATA ]);

    if (0 != shared->__set_debug_comm) {

        return (*(shared->__set_debug_comm))(arg);

    }

    return 0;

}

static int

hal_bsp_set_console_comm(int arg)

{

    bsp_shared_t *shared;

    shared = (bsp_shared_t *)

        (CYGMON_VECTOR_TABLE[ BSP_VEC_BSPDATA ]);

    if (0 != shared->__set_console_comm) {

        return (*(shared->__set_console_comm))(arg);

    }

    return 0;

}

#endif // 0 UNUSED

static void bsp_trap(int trap_num);

static int

hal_bsp_console_write(const void *p, int len)

{

    bsp_shared_t *shared;

    struct bsp_comm_procs *com;

    int  magic;

    /*hal_bsp_set_console_comm(0);*/

    /* If this is not a BSP-based CygMon, return 0 */

    magic = (int)(CYGMON_VECTOR_TABLE[ BSP_VEC_MAGIC ]);

    if (magic != BSP_MAGIC_VAL)

        return 0;

    shared = (bsp_shared_t *)

        (CYGMON_VECTOR_TABLE[ BSP_VEC_BSPDATA ]);

    com = shared->__console_procs;

    if (0 != com) {

        shared->__console_interrupt_flag = 0;

        com->__write(com->ch_data, p, len);

        if (shared->__console_interrupt_flag) {

            /* debug interrupt; stop here */

            bsp_trap(SYS_interrupt);

        }

        return 1;

    }

    return 0;

}

static void

bsp_trap(int trap_num)

{

    asm("syscall\n");

}

static void

hal_dumb_serial_write(const char *p, int len)

{

    int i;

    for ( i = 0 ; i < len; i++ ) {

        hal_diag_dumb_write_char(p[i]);

    }

}

/*

void hal_diag_write_char(char c)

{

    static char line[100];

    static int pos = 0;

    // No need to send CRs

    if( c == '\r' ) return;

    line[pos++] = c;

    if( c == '\n' || pos == sizeof(line) ) {

        CYG_INTERRUPT_STATE old;

        // Disable interrupts. This prevents GDB trying to interrupt us

        // while we are in the middle of sending a packet. The serial

        // receive interrupt will be seen when we re-enable interrupts

        // later.

        HAL_DISABLE_INTERRUPTS(old);

        if ( ! hal_bsp_console_write( line, pos ) )

            // then there is no function registered, just spew it out serial

            hal_dumb_serial_write( line, pos );

        pos = 0;

        // And re-enable interrupts

        HAL_RESTORE_INTERRUPTS(old);

    }

}*/

int

hal_diag_irq_check(int vector)

{

    typedef int irq_check_fn(int irq_nr);

    irq_check_fn *fn = (irq_check_fn *)(CYGMON_VECTOR_TABLE[ BSP_VEC_IRQ_CHECK ]);

    int  magic;

    /* If this is not a BSP-based CygMon, return 0 */

    magic = (int)(CYGMON_VECTOR_TABLE[ BSP_VEC_MAGIC ]);

    if (magic != BSP_MAGIC_VAL)

        return 0;

#if defined(CYGPKG_HAL_MIPS_TX3904)

    /* convert vector to BSP irq number */

    if (vector == 16)

        vector = 2;

    else

        vector += 3;

#endif

    return fn(vector);

}

#endif // defined(CYG_KERNEL_DIAG_CYGMON) *only*

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

/* End of hal_diag.c */