redboot.h

eCos操作系统源码

//==========================================================================
//
//      redboot.h
//
//      Standard interfaces for RedBoot
//
//==========================================================================
//####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
// Copyright (C) 2002, 2003, 2004 Gary Thomas
//
// 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.
//
// This exception does not invalidate any other reasons why a work based on
// 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):    gthomas
// Contributors: gthomas, tkoeller
// Date:         2000-07-14
// Purpose:      
// Description:  
//              
// This code is part of RedBoot (tm).
//
//####DESCRIPTIONEND####
//
//==========================================================================

#ifndef _REDBOOT_H_
#define _REDBOOT_H_

#include <pkgconf/redboot.h>
#include <pkgconf/hal.h>
#include <cyg/hal/hal_if.h>
#include <cyg/hal/hal_tables.h>
#include <cyg/infra/diag.h>
#include <cyg/crc/crc.h>
#include <string.h>

#ifdef CYGPKG_REDBOOT_NETWORKING
#include <net/net.h>
#include <net/bootp.h>
// Determine an IP address for this node, using BOOTP
extern int __bootp_find_local_ip(bootp_header_t *info);
#endif

#ifdef DEFINE_VARS
#define EXTERN
#else
#define EXTERN extern
#endif

// Global variables
EXTERN int argc;
#define MAX_ARGV 16
EXTERN char *argv[MAX_ARGV];
EXTERN unsigned char *ram_start, *ram_end;
EXTERN struct _mem_segment {
    unsigned char *start, *end;
} mem_segments[CYGBLD_REDBOOT_MAX_MEM_SEGMENTS];
#define NO_MEMORY (unsigned char *)0xFFFFFFFF
EXTERN bool valid_address(unsigned char *addr);
EXTERN void cyg_plf_memory_segment(int seg, unsigned char **start, unsigned char **end);
EXTERN unsigned char *workspace_start, *workspace_end;
EXTERN unsigned long workspace_size;

// Data squirreled away after a load operation
EXTERN unsigned long entry_address;
EXTERN unsigned long load_address;
EXTERN unsigned long load_address_end;


#ifdef CYGPKG_REDBOOT_ANY_CONSOLE
EXTERN bool console_selected;
#endif
EXTERN bool console_echo;
EXTERN bool gdb_active;
#if CYGNUM_REDBOOT_CMD_LINE_EDITING != 0
EXTERN bool cmd_history;
#endif

#ifdef CYGPKG_REDBOOT_NETWORKING
EXTERN bool have_net, use_bootp;
EXTERN bootp_header_t my_bootp_info;
EXTERN int gdb_port;
EXTERN bool net_debug;
#endif

#ifdef CYGFUN_REDBOOT_BOOT_SCRIPT
EXTERN unsigned char *script;
EXTERN int script_timeout;
#ifdef CYGSEM_REDBOOT_VARIABLE_BAUD_RATE
EXTERN int console_baud_rate;
#endif
#endif

#ifdef CYGOPT_REDBOOT_FIS_ZLIB_COMMON_BUFFER
EXTERN unsigned char *fis_zlib_common_buffer;
#endif

#ifdef CYGSEM_REDBOOT_PLF_STARTUP
EXTERN void cyg_plf_redboot_startup(void);
#endif

// Prototypes
typedef int _printf_fun(const char *fmt, ...);
externC int  strcasecmp(const char *s1, const char *s2);
externC int  strncasecmp(const char *s1, const char *s2, size_t len);

externC void mon_write_char(char c);
externC bool verify_action(char *fmt, ...);
externC bool verify_action_with_timeout(int timeout, char *fmt, ...);

// Read a single line of input from the console, possibly with timeout
externC int  _rb_gets(char *line, int len, int timeout);
// Just like _rb_gets(), except that the line buffer is assumed to contain
// valid input data.  This provides an easy mechanism for edit-in-place.
externC int  _rb_gets_preloaded(char *line, int len, int timeout);
// Result codes from 'gets()'
#define _GETS_TIMEOUT -1
#define _GETS_CTRLC   -2
#define _GETS_GDB      0
#define _GETS_OK       1
// Test for ^C on the console.  This function should only be used if any
// other console input can be discarded, e.g. while performing some long
// computation, waiting for the network, etc.  Returns 'true' if ^C typed.
externC bool _rb_break(int timeout);

// "console" selection
externC int  start_console(void);
externC void end_console(int old_console);

// Alias functions
#ifdef CYGSEM_REDBOOT_FLASH_ALIASES
externC char *flash_lookup_alias(char *alias, char *alias_buf);
#endif
externC void expand_aliases(char *line, int len);

//
// Stream I/O support
//

typedef struct {
    char *filename;
    int   mode;
    int   chan;
#ifdef CYGPKG_REDBOOT_NETWORKING
    struct sockaddr_in *server;
#endif
} connection_info_t;

typedef struct {
    int   (*open)(connection_info_t *info, int *err);    
    void  (*close)(int *err);    
    void  (*terminate)(bool abort, int (*getc)(void));    
    int   (*read)(char *buf, int size, int *err);    
    char *(*error)(int err);
} getc_io_funcs_t;

#define GETC_IO_FUNCS(_label_, _open_, _close_, _terminate_, _read_, _error_)   \
getc_io_funcs_t _label_ = {                                                     \
    _open_, _close_, _terminate_, _read_, _error_                               \
};

struct load_io_entry {
    char            *name;
    getc_io_funcs_t *funcs;    
    bool             can_verbose;
    bool             need_filename;
    int              mode;
} CYG_HAL_TABLE_TYPE;
#define _RedBoot_load(_name_,_funcs_,_verbose_,_filename_,_mode_)       \
struct load_io_entry _load_tab_##_funcs_##_name_                        \
   CYG_HAL_TABLE_QUALIFIED_ENTRY(RedBoot_load,_funcs_##_name) =         \
     { #_name_, &_funcs_, _verbose_, _filename_, _mode_ }; 
#define RedBoot_load(_name_,_funcs_,_verbose_,_filename_, _mode_)       \
   _RedBoot_load(_name_,_funcs_,_verbose_,_filename_,_mode_)
 
#ifdef CYGPKG_COMPRESS_ZLIB
// Decompression support
typedef struct _pipe {
    unsigned char* in_buf;              // only changed by producer
    int in_avail;                       // only changed by producer
    unsigned char* out_buf;             // only changed by consumer (init by producer)
    int out_size;                       // only changed by consumer (init by producer)
    int out_max;                        // set by producer
    const char* msg;                    // message from consumer
    void* priv;                         // handler's data
} _pipe_t;

typedef int _decompress_fun_init(_pipe_t*);
typedef int _decompress_fun_inflate(_pipe_t*);
typedef int _decompress_fun_close(_pipe_t*, int);

externC _decompress_fun_init* _dc_init;
externC _decompress_fun_inflate* _dc_inflate;
externC _decompress_fun_close* _dc_close;
#endif // CYGPKG_COMPRESS_ZLIB

// CLI support functions
externC bool parse_num(char *s, unsigned long *val, char **es, char *delim);
externC bool parse_bool(char *s, bool *val);

typedef void cmd_fun(int argc, char *argv[]);
struct cmd {
    char    *str;
    char    *help;
    char    *usage;
    cmd_fun *fun;
    struct cmd *sub_cmds, *sub_cmds_end;
} CYG_HAL_TABLE_TYPE;
externC struct cmd *cmd_search(struct cmd *tab, struct cmd *tabend, char *arg);
externC void        cmd_usage(struct cmd *tab, struct cmd *tabend, char *prefix);
#define RedBoot_cmd(_s_,_h_,_u_,_f_) cmd_entry(_s_,_h_,_u_,_f_,0,0,RedBoot_commands)
#define RedBoot_nested_cmd(_s_,_h_,_u_,_f_,_subs_,_sube_) cmd_entry(_s_,_h_,_u_,_f_,_subs_,_sube_,RedBoot_commands)
#define _cmd_entry(_s_,_h_,_u_,_f_,_subs_,_sube_,_n_)                                   \