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