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

//

//      redboot_linux_exec.c

//

//      RedBoot exec command for Linux booting

//

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

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

// 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     

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//

// 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   

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// must still be made available in accordance with section (3) of the GNU   

// General Public License v2.                                               

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

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// ####ECOSGPLCOPYRIGHTEND####                                              

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

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

//

// Author(s):    t@keshi.org

// Contributors: t@keshi.org, jskov, dwmw2

// Date:         2001-07-09

// Purpose:      RedBoot exec command for Linux booting

//

//####DESCRIPTIONEND####

//

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

#include <redboot.h>

#include <cyg/infra/cyg_type.h>

#include <cyg/hal/hal_intr.h>

#include <cyg/hal/hal_cache.h>

#include <cyg/hal/hal_if.h>

#ifdef CYGPKG_IO_ETH_DRIVERS

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

#endif

#define xstr(s) str(s)

#define str(s...) #s

typedef struct

{

        char *name;

        char *val;

} t_env_var;

struct parmblock {

        t_env_var memsize;

        t_env_var modetty0;

        t_env_var ethaddr;

        t_env_var env_end;

        char *argv[2];

        char text[0];

};

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

RedBoot_cmd("exec",

            "Execute an image",

            "[-b <argv addr>] [-c \"kernel command line\"] [-w <timeout>]\n"

            "        [<entry point>]",

            do_exec

    );

static void

do_exec(int argc, char *argv[])

{

    cyg_uint32 entry = (cyg_uint32)entry_address?:CYGDAT_REDBOOT_MIPS_LINUX_BOOT_ENTRY;

    cyg_uint32 base_addr = CYGDAT_REDBOOT_MIPS_LINUX_BOOT_ARGV_ADDR;

    char *cmd_line = xstr(CYGDAT_REDBOOT_MIPS_LINUX_BOOT_COMMAND_LINE);

    bool base_addr_set, cmd_line_set, wait_time_set;

    int wait_time, res;

    char line[8];

    struct option_info opts[3];

    char *pcmd;

    struct parmblock *pb;

    void (*linux)(int, char **, void *);

    int oldints;

    hal_virtual_comm_table_t *__chan;

    int baud;

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

              (void **)&base_addr, &base_addr_set, "base address");

    init_opts(&opts[1], 'w', true, OPTION_ARG_TYPE_NUM,

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

    init_opts(&opts[2], 'c', true, OPTION_ARG_TYPE_STR,

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

    if (!scan_opts(argc, argv, 1, opts, 3, (void *)&entry,

                   OPTION_ARG_TYPE_NUM, "entry address"))

        return;

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

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

        return;

    }

    linux = (void *)entry;

    __chan = CYGACC_CALL_IF_CONSOLE_PROCS();

    baud = CYGACC_COMM_IF_CONTROL(*__chan, __COMMCTL_GETBAUD);

    diag_printf("Now booting linux kernel:\n");

    diag_printf(" Base address 0x%08x Entry 0x%08x\n", base_addr, entry);

    diag_printf(" Cmdline : %s\n", cmd_line);

    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;

        }

    }

    HAL_DISABLE_INTERRUPTS(oldints);

#ifdef CYGPKG_IO_ETH_DRIVERS

    eth_drv_stop();

#endif

    pb = (struct parmblock *)base_addr;

    pcmd = pb->text;

    pb->memsize.name = pcmd;

    pcmd += diag_sprintf(pcmd, "memsize");

    pb->memsize.val = ++pcmd;

    pcmd += diag_sprintf(pcmd, "0x%08x", (ram_end - ram_start + 0xFFFFF) & ~0xFFFFF);

    pb->modetty0.name = ++pcmd;

    pcmd += diag_sprintf(pcmd, "modetty0");

    pb->modetty0.val = ++pcmd;

    pcmd += diag_sprintf(pcmd, "%d,n,8,1,hw", baud);

#ifdef CYGPKG_REDBOOT_NETWORKING

    pb->ethaddr.name = ++pcmd;

    pcmd += diag_sprintf(pcmd, "ethaddr");

    pb->ethaddr.val = ++pcmd;

    pcmd += diag_sprintf(pcmd, "%02x.%02x.%02x.%02x.%02x.%02x",

                         __local_enet_addr[0], __local_enet_addr[1],

                         __local_enet_addr[2], __local_enet_addr[3],

                         __local_enet_addr[4], __local_enet_addr[5]);

    pb->env_end.name = NULL;

    pb->env_end.val = NULL;

#else

    pb->ethaddr.name = NULL;

    pb->ethaddr.val = NULL;

#endif

    /* Point argv[0] at a handy `\0` */

    pb->argv[0] = pcmd;

    pb->argv[1] = ++pcmd;

    strcpy(pcmd, cmd_line);

    HAL_DCACHE_SYNC();

    HAL_ICACHE_DISABLE();

    HAL_DCACHE_DISABLE();

    HAL_DCACHE_SYNC();

    HAL_ICACHE_INVALIDATE_ALL();

    HAL_DCACHE_INVALIDATE_ALL();

    linux(2, pb->argv, pb);

}