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authorStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
committerStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
commit071ea11e85eb9d529cc5eb3d35f6247466a21b99 (patch)
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parent1730ec6b1848f0f32154277f788fb29f88d8475b (diff)
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-/*
- * Copyright (C) 1995 Advanced RISC Machines Limited. All rights reserved.
- *
- * This software may be freely used, copied, modified, and distributed
- * provided that the above copyright notice is preserved in all copies of the
- * software.
- */
-
-/* sys.h
- ***********************************************************************
- * Angel C Libary support channel protocol definitions
- *
- * $Revision$
- * $Date$
- *
- *
- *
- *
- * MESSAGE FORMAT
- * --------------
- * Format of the "data" section of C Lib Support Channel Messages.
- * You will notice that the format is much the same as the format
- * of ADP messages - this is so that multi-threaded C Libraries can
- * be supported.
- *
- * unsigned32 reason - Main C Library reason code.
- * unsigned32 debugID - Info. describing host debug world;
- * private to host and used in any target
- * initiated messages.
- * unsigned32 OSinfo1 \ Target OS information to identify process/thread
- * unsigned32 OSinfo2 / world, etc. These two fields are target defined.
- * byte args[n] - Data for message "reason" code.
- *
- * The "debugID" is defined by the host-end of the protocol, and is used
- * by the host to ensure that messages are routed to the correct handler
- * program/veneer (eg. imagine several threads having opened stdout and
- * each writing to a different window in a windowed debugger).
- *
- * NOTE: The reason that there is no "size" information, is that the
- * message IDs themselves encode the format of any arguments.
- *
- * For further discussion of the format see adp.h
- *
- * N.B. All streams are little endian.
- *
- * CLIB REASON CODE
- * ----------------
- * The message reason codes contain some information that ties them to
- * the channel and direction that the message will be used with. This
- * will ensure that even if the message "#define name" is not
- * completely descriptive, the message reason code is.
- *
- * b31 = direction. 0=Host-to-Target; 1=Target-to-Host;
- * b30-16 = reserved. should be zero
- * b15-0 = message reason code.
- *
- * Note that typically a request will be initiated by the target side, and
- * that the host will then respond with either an acknowledgement or some
- * data. In either case the same reason code will be used, but the direction
- * bit will be reveresed.
- */
-
-#ifndef __sys_h
-#define __sys_h
-
-#ifndef HtoT
-#define HtoT ((unsigned)0 << 31) /* Host-to-Target message */
-#define TtoH ((unsigned)1 << 31) /* Target-to-Host message */
-#endif
-
-/*
- * The following are error codes used in the status field returned on
- * sending a message. 0 represents no error having occurred, non-zero
- * represents a general error. More codes should be added as required.
- */
-
-#ifndef ErrCode
-#define NoError 0x0
-#endif
-
-/*************************************************************************/
-/* The following are direct conversions of the DeMon SWI's */
-/* NB: nbytes is the number of bytes INCLUDING THE NULL character where */
-/* applicable. */
-
-/* This message is used as a response to a packet whose message
- * was not understood. The return parameter, code is the reason
- * code which was not understood. Although intended for use as a
- * default case on a received message switch it can also be used
- * as a proper message*/
-#define CL_Unrecognised 0x00
- /* Unrecognised()
- * return(word code)
- */
-
-/* Write a character to the terminal.
- */
-#define CL_WriteC 0x01
- /* WriteC(byte data)
- * return(word status)
- */
-
-/* Write a NULL terminated string of characters to the terminal. The length
- * of the string excluding the NULL terminating character is passed in
- * 'nbytes'.
- */
-#define CL_Write0 0x02
- /* Write0(word nbytes, bytes data)
- * return(word status)
- */
-
-/* Read a character from the terminal - probably the keyboard.
- */
-#define CL_ReadC 0x04
- /* ReadC(void)
- * return(word status, byte data)
- */
-
-/* Perform system call, pass NULL terminated string to host's command
- * line interpreter(NOT AVAILABLE IN PC/DOS RELEASE). The data byte
- * returned holds the return code from the system call.
- */
-#define CL_System 0x05
- /* CLI(word nbytes, bytes data)
- * return(word status, word data)
- */
-
-/* It returns the address of the null terminated command line string used to
- * invoke the program. status will be set to NoError if the command line
- * can be returned. Other status values will be treated as error conditions.
- */
-#define CL_GetCmdLine 0x10
- /* GetCmdLine(void)
- * return(word status, word nbytes, bytes argline)
- */
-
-/* Return the number of centi-seconds since the support code began
- * execution. Only the difference between successive calls can be
- * meaningful.
- */
-#define CL_Clock 0x61
- /* Clock(void)
- * return(word status, word clks)
- */
-
-/* Return the number of seconds since the beginning of 1970.
- */
-#define CL_Time 0x63
- /* Time(void)
- * return(word status, word time)
- */
-
-/* Delete(remove, un-link, wipe, destroy) the file named by the
- * NULL-terminated string 'name'.
- */
-#define CL_Remove 0x64
- /* Remove(word nbytes, bytes name)
- * return(word status)
- */
-
-/* Rename the file specified by the NULL-terminated string 'oname'
- * to 'nname'.
- */
-#define CL_Rename 0x65
- /* Rename(word nbytes, bytes oname, word nbytes, bytes nname)
- * return(word status)
- */
-
-/* 'name' specifies a NULL-terminated string containing a file name or a
- * device name. Opens the file/device and returns a non-zero handle on
- * success that can be quoted to CL_Close, CL_Read, CL_Write, CL_Seek,
- * CL_Flen or CL_IsTTY. The mode is an integer in the range 0-11:-
- *
- * Mode: 0 1 2 3 4 5 6 7 8 9 10 11
- * ANSI C fopen mode: r rb r+ r+b w wb w+ w+b a ab a+ a+b
- *
- * Values 12-15 are illegal. If 'name' is ":tt" the stdin/stdout is
- * opened depending on whether 'mode' is read or write.
- */
-#define CL_Open 0x66
- /* Open(word nbytes, bytes name, word mode)
- * return(word handle)
- */
-
-/* 'handle' is a file handle previously returned by CL_Open. CL_Close
- * closes the file.
- */
-#define CL_Close 0x68
- /* Close(word handle)
- * return(word status)
- */
-
-/* Writes data of length nbytes to the file/device specified by
- * handle. nbtotal represents the total number of bytes to be
- * written, whereas nbytes is the number of bytes in this packet
- *
- * If nbtotal is <= DATASIZE - CL_Write message header size in the
- * packet then nbytes = nbtotal and the number of bytes not written
- * is returned. If nbtotal is > the packet size then the CL_Write
- * must be followed by a number of CL_WriteX's to complete the write,
- * the nbytes returned by CL_Write can be ignored
- * If the status word returned is non zero, an error has occurred and
- * the write request has been aborted.
- *
- */
-#define CL_Write 0x69
- /* Write(word handle, word nbtotal, word nbytes, bytes data)
- * return(word status, word nbytes)
- */
-
-/* Write Extension is a reads a continuation of data from a CL_Write
- * which was too big to fit in a single packet.
- * nbytes is the number of bytes of data in this packet, the
- * returned value of nbytes can be ignored except if it is the
- * last packet, in which case it is the number of bytes that were NOT
- * written
- */
-#define CL_WriteX 0x6A
- /* WriteX(word nbytes, bytes data)
- * return(word status, word nbytes)
- */
-
-/* Reads 'nbytes' from the file/device specified by 'handle'.
- *
- * If nbytes <= DATASIZE then the read will occur in a single packet
- * and the returned value of nbytes will be the number of bytes actually
- * read and nbmore will be 0. If nbytes> DATASIZE then multiple packets
- * will have to be used ie CL_Read followed by 1 or more CL_ReadX
- * packets. In this case CL_Read will return nbytes read in the current
- * packet and nbmore representing how many more bytes are expected to be
- * read
- * If the status word is non zero then the request has completed with an
- * error. If the status word is 0xFFFFFFFF (-1) then an EOF condition
- * has been reached.
- */
-#define CL_Read 0x6B
- /* Read(word handle, word nbytes)
- * return(word status, word nbytes, word nbmore, bytes data)
- */
-
-/* Read eXtension returns a continuation of the data that was opened for
- * read in the earlier CL_Read. The return value nbytes is the number of
- * data bytes in the packet, nbmore is the number of bytes more that are
- * expected to be read in subsequent packets.
- */
-#define CL_ReadX 0x6C
- /* ReadX()
- * return(word status, word nbytes, word nbmore, bytes data)
- */
-
-/* Seeks to byte position 'posn' in the file/device specified by 'handle'.
- */
-#define CL_Seek 0x6D
- /* Seek(word handle, word posn)
- * return(word status)
- */
-
-/* Returns the current length of the file specified by 'handle' in 'len'.
- * If an error occurs 'len' is set to -1.
- */
-#define CL_Flen 0x6E
- /* Flen(word handle)
- * return(word len)
- */
-
-/* Returns NoError if 'handle' specifies an interactive device, otherwise
- * returns GenError
- */
-#define CL_IsTTY 0x6F
- /* IsTTY(word handle)
- * return(word status)
- */
-
-/* Returns a temporary host file name. The maximum length of a file name
- * is passed to the host. The TargetID is some identifier from the target
- * for this particular temporary filename. This value is could be used
- * directly in the generation of the filename.
- *
- * If the host cannot create a suitable name or the generated name is too
- * long then status is non zero. status will be NoError if the host can create
- * a name.
- */
-#define CL_TmpNam 0x70
- /* TmpNam(word maxlength, word TargetID)
- * return(word status, word nbytes, bytes fname)
- */
-
-/* Note there is no message for Exit, EnterOS, InstallHandler or
- * GenerateError as these will be supported entirely at the host end,
- * or by the underlying Operating system.
- */
-
-#define CL_UnknownReason (-1)
-
-extern unsigned int GetRaiseHandler( void );
-extern unsigned int SysLibraryHandler(unsigned int sysCode, unsigned int *args);
-extern void angel_SysLibraryInit(void);
-
-/*
- * Function: Angel_IsSysHandlerRunning
- * Purpose: return whether or not SysLibraryHandler is running
- *
- * No paramaters
- *
- * Returns 1 if SysLibraryHandler is running
- * 0 otherwise
- */
-extern int Angel_IsSysHandlerRunning(void);
-
-#ifdef ICEMAN2
-/* This function exists in an ICEman2 system only, and can be called by
- * debug support code when the debugger tells it how much memory the
- * target has. This will then be used to deal with the HEAPINFO SWI
- */
-extern void angel_SetTopMem(unsigned addr);
-#endif
-
-#endif
-