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

//

//      redboot_linux_exec.c

//

//      AM33 Linux specific RedBoot exec command

//

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

// ####ECOSGPLCOPYRIGHTBEGIN####                                            

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

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

// Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004 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):    dhowells

// Contributors: gthomas, jskov, msalter

// Date:         2001-07-19

// Purpose:      

// Description:  

//              

// This code is part of RedBoot (tm).

//

//####DESCRIPTIONEND####

//

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

#include <redboot.h>

#include <cyg/hal/hal_intr.h>

#include <cyg/hal/hal_cache.h>

#ifdef CYGPKG_IO_ETH_DRIVERS

#include <cyg/io/eth/eth_drv.h>            // Logical driver interfaces

#endif

// Exported CLI function(s)

// The exec command works like the go command in YAMON - that is,

// providing callee with argc, argv, and env. In addition to the

// information provided by the user, 

static void do_exec(int argc, char *argv[]);

static char exec_usage[] =

            "[-w timeout] [-c \"kernel command line\"] [<entry_point>]";

RedBoot_cmd("exec",

            "Execute an image - with MMU off",

            exec_usage,

            do_exec

            );

typedef void (*code_fun)(void) __attribute__((noreturn));

static void

do_exec(int argc, char *argv[])

{

    unsigned long oldints;

    bool wait_time_set;

    int  wait_time, res;

    bool cmd_line_set;

    struct option_info opts[4];

    code_fun entry;

    char line[8];

    char *cmd_line;

    int num_options;

    entry = (code_fun)entry_address;  // Default from last 'load' operation

    init_opts(&opts[0], 'w', true, OPTION_ARG_TYPE_NUM,

              (void **)&wait_time, (bool *)&wait_time_set, "wait timeout");

    init_opts(&opts[1], 'c', true, OPTION_ARG_TYPE_STR,

              (void **)&cmd_line, (bool *)&cmd_line_set, "kernel command line");

    num_options = 2;

    if (!scan_opts(argc, argv, 1, opts, num_options, (void *)&entry,

                   OPTION_ARG_TYPE_NUM, "starting address"))

    {

        return;

    }

    if (entry == (unsigned long)NO_MEMORY) {

        diag_printf("Can't execute Linux - invalid entry address\n");

        return;

    }

    if (cmd_line_set) {

        memcpy((char*)CYGHWR_REDBOOT_AM33_LINUX_CMD_ADDRESS,"cmdline:",8);

        strncpy((char*)CYGHWR_REDBOOT_AM33_LINUX_CMD_ADDRESS+8,cmd_line,256);

        *(char*)(CYGHWR_REDBOOT_AM33_LINUX_CMD_ADDRESS+8+256) = 0;

    }

    else {

        *(char*)(CYGHWR_REDBOOT_AM33_LINUX_CMD_ADDRESS+256) = 0;

    }

    if (wait_time_set) {

        diag_printf("About to start execution at %p - abort with ^C within %d seconds\n",

                    (void *)entry, wait_time);

        res = _rb_gets(line, sizeof(line), wait_time*1000);

        if (res == _GETS_CTRLC) {

            return;

        }

    }

#ifdef CYGPKG_IO_ETH_DRIVERS

    eth_drv_stop();

#endif

    HAL_DISABLE_INTERRUPTS(oldints);

    HAL_DCACHE_SYNC();

    HAL_ICACHE_DISABLE();

    HAL_DCACHE_DISABLE();

    HAL_DCACHE_SYNC();

    HAL_ICACHE_INVALIDATE_ALL();

    HAL_DCACHE_INVALIDATE_ALL();

    (*entry)();

}

// EOF redboot_linux_exec.c