| /* nullmon.c - Stub or monitor services. |
| * |
| * Copyright (c) 1998 Cygnus Support |
| * |
| * The authors hereby grant permission to use, copy, modify, distribute, |
| * and license this software and its documentation for any purpose, provided |
| * that existing copyright notices are retained in all copies and that this |
| * notice is included verbatim in any distributions. No written agreement, |
| * license, or royalty fee is required for any of the authorized uses. |
| * Modifications to this software may be copyrighted by their authors |
| * and need not follow the licensing terms described here, provided that |
| * the new terms are clearly indicated on the first page of each file where |
| * they apply. |
| */ |
| |
| /* This is a ROMSTUB |
| Various libraries in libgloss may reference board specific services. |
| These are often performed by system calls and by rom specific |
| interfaces such as dvemon.c This file defines the null interface in |
| which the rom monitor either does not exist or is not used. |
| Linking with this file supports applications which only exercise |
| the processor, specifically, the GDB test suite. |
| By linking this object in rather than a monitor specific support |
| we can insure that the testsuite will run without references or |
| linkages to nonexistent monitor services. |
| Similarly, every service provided by this file muse be provided by all |
| monitor speciifc interfaces. |
| PLEASE DO NOT MAKE THIS FILE SPECIFIC TO ANY MONITOR |
| */ |
| |
| /* This form is giving linker relocation errors */ |
| #if ! defined(BOARD_MEM_SIZE) |
| #define BOARD_MEM_SIZE 0x100000 /* About a megabyte */ |
| #endif |
| extern char _ftext[]; /* Defined in nullmon.ld */ |
| extern char _end[]; /* Defined in nullmon.ld */ |
| |
| #if defined(FIXME_WARNINGS) |
| #warning("FIXME: struct s_mem belongs in a header file") |
| #endif |
| struct s_mem |
| { unsigned int size; |
| unsigned int icsize; |
| unsigned int dcsize; |
| }; |
| |
| void |
| get_mem_info (mem) |
| struct s_mem *mem; |
| { |
| mem->size = BOARD_MEM_SIZE - (_end - _ftext); |
| } |
| |
| /* SYSTEM INTERFACE |
| Since we are defining a NULL operating environment here, I am |
| entering the stub definitions for the GNUpro libraries, System Calls. |
| I would rather not to even pretend to support these functions but, they |
| get pulled in by other libraries. |
| */ |
| |
| int read(int file, char * ptr , int len) { return 0 ; } |
| int close (int file) { return -1 ; } |
| int write(int file , char * ptr, int len) { return 0 ; } |
| /*eof*/ |