70 lines
2.5 KiB
C
70 lines
2.5 KiB
C
/* nullmon.c - Stub or monitor services.
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*
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* Copyright (c) 1998 Cygnus Support
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*
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* The authors hereby grant permission to use, copy, modify, distribute,
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* and license this software and its documentation for any purpose, provided
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* that existing copyright notices are retained in all copies and that this
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* notice is included verbatim in any distributions. No written agreement,
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* license, or royalty fee is required for any of the authorized uses.
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* Modifications to this software may be copyrighted by their authors
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* and need not follow the licensing terms described here, provided that
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* the new terms are clearly indicated on the first page of each file where
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* they apply.
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*/
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/* This is a ROMSTUB
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Various libraries in libgloss may reference board specific services.
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These are often performed by system calls and by rom specific
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interfaces such as dvemon.c This file defines the null interface in
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which the rom monitor either does not exist or is not used.
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Linking with this file supports applications which only exercise
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the processor, specifically, the GDB test suite.
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By linking this object in rather than a monitor specific support
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we can insure that the testsuite will run without references or
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linkages to nonexistent monitor services.
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Similarly, every service provided by this file muse be provided by all
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monitor speciifc interfaces.
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PLEASE DO NOT MAKE THIS FILE SPECIFIC TO ANY MONITOR
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*/
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/* This form is giving linker relocation errors */
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#if ! defined(BOARD_MEM_SIZE)
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#define BOARD_MEM_SIZE 0x100000 /* About a megabyte */
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#endif
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extern unsigned char _ftext ; /* Defined in nullmon.ld */
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extern unsigned char _end ; /* Defined in nullmon.ld */
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#if defined(FIXME_WARNINGS)
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#warning("FIXME: struct s_mem belongs in a header file")
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#endif
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struct s_mem
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{ unsigned int size;
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unsigned int icsize;
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unsigned int dcsize;
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};
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void
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get_mem_info (mem)
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struct s_mem *mem;
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{ char * t1, * t2 ;
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unsigned long long tmp ;
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t1 = & _ftext ;
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t2 = & _end ;
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tmp = (unsigned long long) (t2 - t1) ;
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tmp = (unsigned long long) BOARD_MEM_SIZE - tmp ;
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mem->size = tmp ;
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}
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/* SYSTEM INTERFACE
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Since we are defining a NULL operating environment here, I am
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entering the stub definitions for the GNUpro libraries, System Calls.
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I would rather not to even pretend to support these functions but, they
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get pulled in by other libraries.
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*/
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int read(int file, char * ptr , int len) { return 0 ; }
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int close (int file) { return -1 ; }
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int write(int file , char * ptr, int len) { return 0 ; }
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/*eof*/
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