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binutils-gdb/gdb/rdi-share/devsw.c

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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.
*/
/* -*-C-*-
*
* $Revision$
* $Date$
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <time.h>
#include "adp.h"
#include "sys.h"
#include "hsys.h"
#include "rxtx.h"
#include "drivers.h"
#include "buffers.h"
#include "devclnt.h"
#include "adperr.h"
#include "devsw.h"
#include "hostchan.h"
#include "logging.h"
static char *angelDebugFilename = NULL;
static FILE *angelDebugLogFile = NULL;
static int angelDebugLogEnable = 0;
static void openLogFile ()
{
time_t t;
if (angelDebugFilename == NULL || *angelDebugFilename =='\0')
return;
angelDebugLogFile = fopen (angelDebugFilename,"a");
if (!angelDebugLogFile)
{
fprintf (stderr,"Error opening log file '%s'\n",angelDebugFilename);
perror ("fopen");
}
else
{
/* The following line is equivalent to: */
/* setlinebuf (angelDebugLogFile); */
setvbuf(angelDebugLogFile, (char *)NULL, _IOLBF, 0);
#if defined(__CYGWIN__)
setmode(fileno(angelDebugLogFile), O_TEXT);
#endif
}
time (&t);
fprintf (angelDebugLogFile,"ADP log file opened at %s\n",asctime(localtime(&t)));
}
static void closeLogFile (void)
{
time_t t;
if (!angelDebugLogFile)
return;
time (&t);
fprintf (angelDebugLogFile,"ADP log file closed at %s\n",asctime(localtime(&t)));
fclose (angelDebugLogFile);
angelDebugLogFile = NULL;
}
void DevSW_SetLogEnable (int logEnableFlag)
{
if (logEnableFlag && !angelDebugLogFile)
openLogFile ();
else if (!logEnableFlag && angelDebugLogFile)
closeLogFile ();
angelDebugLogEnable = logEnableFlag;
}
void DevSW_SetLogfile (const char *filename)
{
closeLogFile ();
if (angelDebugFilename)
{
free (angelDebugFilename);
angelDebugFilename = NULL;
}
if (filename && *filename)
{
angelDebugFilename = strdup (filename);
if (angelDebugLogEnable)
openLogFile ();
}
}
#define WordAt(p) ((unsigned long) ((p)[0] | ((p)[1]<<8) | ((p)[2]<<16) | ((p)[3]<<24)))
static void dumpPacket(FILE *fp, char *label, struct data_packet *p)
{
unsigned r;
int i;
unsigned char channel;
if (!fp)
return;
fprintf(fp,"%s [T=%d L=%d] ",label,p->type,p->len);
for (i=0; i<p->len; ++i)
fprintf(fp,"%02x ",p->data[i]);
fprintf(fp,"\n");
channel = p->data[0];
r = WordAt(p->data+4);
fprintf(fp,"R=%08x ",r);
fprintf(fp,"%s ", r&0x80000000 ? "H<-T" : "H->T");
switch (channel)
{
case CI_PRIVATE: fprintf(fp,"CI_PRIVATE: "); break;
case CI_HADP: fprintf(fp,"CI_HADP: "); break;
case CI_TADP: fprintf(fp,"CI_TADP: "); break;
case CI_HBOOT: fprintf(fp,"CI_HBOOT: "); break;
case CI_TBOOT: fprintf(fp,"CI_TBOOT: "); break;
case CI_CLIB: fprintf(fp,"CI_CLIB: "); break;
case CI_HUDBG: fprintf(fp,"CI_HUDBG: "); break;
case CI_TUDBG: fprintf(fp,"CI_TUDBG: "); break;
case CI_HTDCC: fprintf(fp,"CI_HTDCC: "); break;
case CI_TTDCC: fprintf(fp,"CI_TTDCC: "); break;
case CI_TLOG: fprintf(fp,"CI_TLOG: "); break;
default: fprintf(fp,"BadChan: "); break;
}
switch (r & 0xffffff)
{
case ADP_Booted: fprintf(fp," ADP_Booted "); break;
#if defined(ADP_TargetResetIndication)
case ADP_TargetResetIndication: fprintf(fp," ADP_TargetResetIndication "); break;
#endif
case ADP_Reboot: fprintf(fp," ADP_Reboot "); break;
case ADP_Reset: fprintf(fp," ADP_Reset "); break;
#if defined(ADP_HostResetIndication)
case ADP_HostResetIndication: fprintf(fp," ADP_HostResetIndication "); break;
#endif
case ADP_ParamNegotiate: fprintf(fp," ADP_ParamNegotiate "); break;
case ADP_LinkCheck: fprintf(fp," ADP_LinkCheck "); break;
case ADP_HADPUnrecognised: fprintf(fp," ADP_HADPUnrecognised "); break;
case ADP_Info: fprintf(fp," ADP_Info "); break;
case ADP_Control: fprintf(fp," ADP_Control "); break;
case ADP_Read: fprintf(fp," ADP_Read "); break;
case ADP_Write: fprintf(fp," ADP_Write "); break;
case ADP_CPUread: fprintf(fp," ADP_CPUread "); break;
case ADP_CPUwrite: fprintf(fp," ADP_CPUwrite "); break;
case ADP_CPread: fprintf(fp," ADP_CPread "); break;
case ADP_CPwrite: fprintf(fp," ADP_CPwrite "); break;
case ADP_SetBreak: fprintf(fp," ADP_SetBreak "); break;
case ADP_ClearBreak: fprintf(fp," ADP_ClearBreak "); break;
case ADP_SetWatch: fprintf(fp," ADP_SetWatch "); break;
case ADP_ClearWatch: fprintf(fp," ADP_ClearWatch "); break;
case ADP_Execute: fprintf(fp," ADP_Execute "); break;
case ADP_Step: fprintf(fp," ADP_Step "); break;
case ADP_InterruptRequest: fprintf(fp," ADP_InterruptRequest "); break;
case ADP_HW_Emulation: fprintf(fp," ADP_HW_Emulation "); break;
case ADP_ICEbreakerHADP: fprintf(fp," ADP_ICEbreakerHADP "); break;
case ADP_ICEman: fprintf(fp," ADP_ICEman "); break;
case ADP_Profile: fprintf(fp," ADP_Profile "); break;
case ADP_InitialiseApplication: fprintf(fp," ADP_InitialiseApplication "); break;
case ADP_End: fprintf(fp," ADP_End "); break;
case ADP_TADPUnrecognised: fprintf(fp," ADP_TADPUnrecognised "); break;
case ADP_Stopped: fprintf(fp," ADP_Stopped "); break;
case ADP_TDCC_ToHost: fprintf(fp," ADP_TDCC_ToHost "); break;
case ADP_TDCC_FromHost: fprintf(fp," ADP_TDCC_FromHost "); break;
case CL_Unrecognised: fprintf(fp," CL_Unrecognised "); break;
case CL_WriteC: fprintf(fp," CL_WriteC "); break;
case CL_Write0: fprintf(fp," CL_Write0 "); break;
case CL_ReadC: fprintf(fp," CL_ReadC "); break;
case CL_System: fprintf(fp," CL_System "); break;
case CL_GetCmdLine: fprintf(fp," CL_GetCmdLine "); break;
case CL_Clock: fprintf(fp," CL_Clock "); break;
case CL_Time: fprintf(fp," CL_Time "); break;
case CL_Remove: fprintf(fp," CL_Remove "); break;
case CL_Rename: fprintf(fp," CL_Rename "); break;
case CL_Open: fprintf(fp," CL_Open "); break;
case CL_Close: fprintf(fp," CL_Close "); break;
case CL_Write: fprintf(fp," CL_Write "); break;
case CL_WriteX: fprintf(fp," CL_WriteX "); break;
case CL_Read: fprintf(fp," CL_Read "); break;
case CL_ReadX: fprintf(fp," CL_ReadX "); break;
case CL_Seek: fprintf(fp," CL_Seek "); break;
case CL_Flen: fprintf(fp," CL_Flen "); break;
case CL_IsTTY: fprintf(fp," CL_IsTTY "); break;
case CL_TmpNam: fprintf(fp," CL_TmpNam "); break;
default: fprintf(fp," BadReason "); break;
}
i = 20;
if (((r & 0xffffff) == ADP_CPUread ||
(r & 0xffffff) == ADP_CPUwrite) && (r&0x80000000)==0)
{
fprintf(fp,"%02x ", p->data[i]);
++i;
}
for (; i<p->len; i+=4)
fprintf(fp,"%08x ",WordAt(p->data+i));
fprintf(fp,"\n");
}
/*
* TODO: this should be adjustable - it could be done by defining
* a reason code for DevSW_Ioctl. It could even be a
* per-devicechannel parameter.
*/
static const unsigned int allocsize = ADP_BUFFER_MIN_SIZE;
#define illegalDevChanID(type) ((type) >= DC_NUM_CHANNELS)
/**********************************************************************/
/*
* Function: initialise_read
* Purpose: Set up a read request for another packet
*
* Params:
* In/Out: ds State structure to be initialised
*
* Returns:
* OK: 0
* Error: -1
*/
static int initialise_read(DevSWState *ds)
{
struct data_packet *dp;
/*
* try to claim the structure that will
* eventually hold the new packet.
*/
if ((ds->ds_nextreadpacket = DevSW_AllocatePacket(allocsize)) == NULL)
return -1;
/*
* Calls into the device driver use the DriverCall structure: use
* the buffer we have just allocated, and declare its size. We
* are also obliged to clear the driver's context pointer.
*/
dp = &ds->ds_activeread.dc_packet;
dp->buf_len = allocsize;
dp->data = ds->ds_nextreadpacket->pk_buffer;
ds->ds_activeread.dc_context = NULL;
return 0;
}
/*
* Function: initialise_write
* Purpose: Set up a write request for another packet
*
* Params:
* Input: packet The packet to be written
*
* type The type of the packet
*
* In/Out: dc The structure to be intialised
*
* Returns: Nothing
*/
static void initialise_write(DriverCall *dc, Packet *packet, DevChanID type)
{
struct data_packet *dp = &dc->dc_packet;
dp->len = packet->pk_length;
dp->data = packet->pk_buffer;
dp->type = type;
/*
* we are required to clear the state structure for the driver
*/
dc->dc_context = NULL;
}
/*
* Function: enqueue_packet
* Purpose: move a newly read packet onto the appropriate queue
* of read packets
*
* Params:
* In/Out: ds State structure with new packet
*
* Returns: Nothing
*/
static void enqueue_packet(DevSWState *ds)
{
struct data_packet *dp = &ds->ds_activeread.dc_packet;
Packet *packet = ds->ds_nextreadpacket;
/*
* transfer the length
*/
packet->pk_length = dp->len;
/*
* take this packet out of the incoming slot
*/
ds->ds_nextreadpacket = NULL;
/*
* try to put it on the correct input queue
*/
if (illegalDevChanID(dp->type))
{
/* this shouldn't happen */
WARN("Illegal type for Rx packet");
DevSW_FreePacket(packet);
}
else
Adp_addToQueue(&ds->ds_readqueue[dp->type], packet);
}
/*
* Function: flush_packet
* Purpose: Send a packet to the device driver
*
* Params:
* Input: device The device to be written to
*
* In/Out: dc Describes the packet to be sent
*
* Returns: Nothing
*
* Post-conditions: If the whole packet was accepted by the device
* driver, then dc->dc_packet.data will be
* set to NULL.
*/
static void flush_packet(const DeviceDescr *device, DriverCall *dc)
{
if (device->DeviceWrite(dc) > 0)
/*
* the whole packet was swallowed
*/
dc->dc_packet.data = NULL;
}
/**********************************************************************/
/*
* These are the externally visible functions. They are documented in
* devsw.h
*/
Packet *DevSW_AllocatePacket(const unsigned int length)
{
Packet *pk;
if ((pk = malloc(sizeof(*pk))) == NULL)
{
WARN("malloc failure");
return NULL;
}
if ((pk->pk_buffer = malloc(length+CHAN_HEADER_SIZE)) == NULL)
{
WARN("malloc failure");
free(pk);
return NULL;
}
return pk;
}
void DevSW_FreePacket(Packet *pk)
{
free(pk->pk_buffer);
free(pk);
}
AdpErrs DevSW_Open(DeviceDescr *device, const char *name, const char *arg,
const DevChanID type)
{
DevSWState *ds;
/*
* is this the very first open call for this driver?
*/
if ((ds = (DevSWState *)(device->SwitcherState)) == NULL)
{
/*
* yes, it is: initialise state
*/
if ((ds = malloc(sizeof(*ds))) == NULL)
/* give up */
return adp_malloc_failure;
(void)memset(ds, 0, sizeof(*ds));
device->SwitcherState = (void *)ds;
}
/*
* check that we haven't already been opened for this type
*/
if ((ds->ds_opendevchans & (1 << type)) != 0)
return adp_device_already_open;
/*
* if no opens have been done for this device, then do it now
*/
if (ds->ds_opendevchans == 0)
if (device->DeviceOpen(name, arg) < 0)
return adp_device_open_failed;
/*
* open has finished
*/
ds->ds_opendevchans |= (1 << type);
return adp_ok;
}
AdpErrs DevSW_Match(const DeviceDescr *device, const char *name,
const char *arg)
{
return (device->DeviceMatch(name, arg) == -1) ? adp_failed : adp_ok;
}
AdpErrs DevSW_Close (DeviceDescr *device, const DevChanID type)
{
DevSWState *ds = (DevSWState *)(device->SwitcherState);
Packet *pk;
if ((ds->ds_opendevchans & (1 << type)) == 0)
return adp_device_not_open;
ds->ds_opendevchans &= ~(1 << type);
/*
* if this is the last close for this channel, then inform the driver
*/
if (ds->ds_opendevchans == 0)
device->DeviceClose();
/*
* release all packets of the appropriate type
*/
for (pk = Adp_removeFromQueue(&(ds->ds_readqueue[type]));
pk != NULL;
pk = Adp_removeFromQueue(&(ds->ds_readqueue[type])))
DevSW_FreePacket(pk);
/* Free memory */
free ((char *) device->SwitcherState);
device->SwitcherState = 0x0;
/* that's all */
return adp_ok;
}
AdpErrs DevSW_Read(const DeviceDescr *device, const DevChanID type,
Packet **packet, bool block)
{
int read_err;
DevSWState *ds = device->SwitcherState;
/*
* To try to get information out of the device driver as
* quickly as possible, we try and read more packets, even
* if a completed packet is already available.
*/
/*
* have we got a packet currently pending?
*/
if (ds->ds_nextreadpacket == NULL)
/*
* no - set things up
*/
if (initialise_read(ds) < 0) {
/*
* we failed to initialise the next packet, but can
* still return a packet that has already arrived.
*/
*packet = Adp_removeFromQueue(&ds->ds_readqueue[type]);
return adp_ok;
}
read_err = device->DeviceRead(&ds->ds_activeread, block);
switch (read_err) {
case 1:
/*
* driver has pulled in a complete packet, queue it up
*/
#ifdef RET_DEBUG
printf("got a complete packet\n");
#endif
if (angelDebugLogEnable)
dumpPacket(angelDebugLogFile,"rx:",&ds->ds_activeread.dc_packet);
enqueue_packet(ds);
*packet = Adp_removeFromQueue(&ds->ds_readqueue[type]);
return adp_ok;
case 0:
/*
* OK, return the head of the read queue for the given type
*/
/* enqueue_packet(ds); */
*packet = Adp_removeFromQueue(&ds->ds_readqueue[type]);
return adp_ok;
case -1:
#ifdef RET_DEBUG
printf("got a bad packet\n");
#endif
/* bad packet */
*packet = NULL;
return adp_bad_packet;
default:
panic("DevSW_Read: bad read status %d", read_err);
}
return 0; /* get rid of a potential compiler warning */
}
AdpErrs DevSW_FlushPendingWrite(const DeviceDescr *device)
{
struct DriverCall *dc;
struct data_packet *dp;
dc = &((DevSWState *)(device->SwitcherState))->ds_activewrite;
dp = &dc->dc_packet;
/*
* try to flush any packet that is still being written
*/
if (dp->data != NULL)
{
flush_packet(device, dc);
/* see if it has gone */
if (dp->data != NULL)
return adp_write_busy;
else
return adp_ok;
}
else
return adp_ok;
}
AdpErrs DevSW_Write(const DeviceDescr *device, Packet *packet, DevChanID type)
{
struct DriverCall *dc;
struct data_packet *dp;
dc = &((DevSWState *)(device->SwitcherState))->ds_activewrite;
dp = &dc->dc_packet;
if (illegalDevChanID(type))
return adp_illegal_args;
/*
* try to flush any packet that is still being written
*/
if (DevSW_FlushPendingWrite(device) != adp_ok)
return adp_write_busy;
/*
* we can take this packet - set things up, then try to get rid of it
*/
initialise_write(dc, packet, type);
if (angelDebugLogEnable)
dumpPacket(angelDebugLogFile,"tx:",&dc->dc_packet);
flush_packet(device, dc);
return adp_ok;
}
AdpErrs DevSW_Ioctl(const DeviceDescr *device, const int opcode, void *args)
{
return (device->DeviceIoctl(opcode, args) < 0) ? adp_failed : adp_ok;
}
bool DevSW_WriteFinished(const DeviceDescr *device)
{
struct DriverCall *dc;
struct data_packet *dp;
dc = &((DevSWState *)(device->SwitcherState))->ds_activewrite;
dp = &dc->dc_packet;
return (dp == NULL || dp->data == NULL);
}
/* EOF devsw.c */
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