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static char _[] = "@(#)pceb.c   5.18 93/07/30 16:40:31, AMD.";

/******************************************************************************

 * Copyright 1991 Advanced Micro Devices, Inc.

 *

 * This software is the property of Advanced Micro Devices, Inc  (AMD)  which

 * specifically  grants the user the right to modify, use and distribute this

 * software provided this notice is not removed or altered.  All other rights

 * are reserved by AMD.

 *

 * AMD MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS

 * SOFTWARE.  IN NO EVENT SHALL AMD BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL

 * DAMAGES IN CONNECTION WITH OR ARISING FROM THE FURNISHING, PERFORMANCE, OR

 * USE OF THIS SOFTWARE.

 *

 * So that all may benefit from your experience, please report  any  problems

 * or  suggestions about this software to the 29K Technical Support Center at

 * 800-29-29-AMD (800-292-9263) in the USA, or 0800-89-1131  in  the  UK,  or

 * 0031-11-1129 in Japan, toll free.  The direct dial number is 512-462-4118.

 *

 * Advanced Micro Devices, Inc.

 * 29K Support Products

 * Mail Stop 573

 * 5900 E. Ben White Blvd.

 * Austin, TX 78741

 * 800-292-9263

 *****************************************************************************

 *      Engineer: Srini Subramanian.

 *****************************************************************************

 **

 **       This file defines functions which initialize and access the

 **       the PCEB 29K board.

 **

 *****************************************************************************

 */

#include <stdio.h>

#include <memory.h>

#include "messages.h"

#include "pceb.h"

#include "memspcs.h"

#include "macros.h"

#include "tdfunc.h"

#include "mtip.h"

#include <dos.h>

#include <conio.h>

void  endian_cvt PARAMS((union msg_t *, int));

void  tip_convert32 PARAMS((BYTE *));

/*

** This function is used to initialize the communication

** channel.  This consists of setting the window location

** of the PCEB to the value defined by the values in

** the file PCEB.h.

*/

/*ARGSUSED*/

INT32

init_comm_pceb(PC_port_base, PC_mem_seg)

INT32   PC_port_base;

INT32   PC_mem_seg;

   {

   /*** check for existence of the board ***/

   /* Set up PCCNF and reset processor */

   outp((unsigned int) (PC_port_base + PCEB_PCCNF_OFFSET),

        ((int) (PC_mem_seg & 0x7000) >> 10));

   outp((unsigned int) (PC_port_base + PCEB_PC229K_OFFSET),

        (int) (PCEB_LB_END | PCEB_WINENA | PCEB_S_HALT));

   return(0);

   }

/*

** This function is used to send a message to the PCEB.

** If the message is successfully sent, a zero is

** returned.  If the message was not sendable, a -1

** is returned.

**

** Also note that this function does endian conversion on the

** returned message.  This is necessary because the Am29000

** target will be sending big-endian messages and the PC will

** be expecting little-endian.

*/

INT32

msg_send_pceb(msg_ptr, PC_port_base)

   union  msg_t  *msg_ptr;

   INT32        PC_port_base;

   {

   INT32    result;

   int    pc229k;

   INT32  message_size;

   INT32        semaphore;

   INT32        result3;

         /* Set semaphore (PCEB_RECV_BUF_PTR) to zero */

           semaphore = (INT32) 0;

           result3 = Mini_write_memory ((INT32)   D_MEM,

                                      (ADDR32) PCEB_RECV_BUF_PTR,

                                      (INT32)  sizeof(INT32),

                                      (BYTE *) &semaphore);

   /* Get size of whole message */

   message_size = (msg_ptr->generic_msg).length + (2 * sizeof(INT32));

   /* Do endian conversion */

   if (tip_target_config.TipEndian != tip_target_config.P29KEndian)

      endian_cvt(msg_ptr, OUTGOING_MSG);

   /* Send message */

   result = Mini_write_memory ((INT32)  D_MEM,

                              (ADDR32) PCEB_SEND_BUF,

                              (INT32)  message_size,

                              (BYTE *) msg_ptr);

   /* Interrupt target (write to pceb mailbox) */

   pc229k = (PCEB_P_REQ | PCEB_WINENA | PCEB_LB_END | PCEB_S_NORMAL);

   outp((unsigned int) (PC_port_base + PCEB_PC229K_OFFSET),

        (int) pc229k);

   /* Did everything go ok? */

   if (result != 0)

      return(-1);

      else

         return(0);

   }  /* end msg_send_pceb() */

/*

** This function is used to receive a message to the PCEB.

** If the message is waiting in the buffer, the message Code is

** returned and the buffer pointed to by msg_ptr is filled

** in.  If no message was available, a -1 is returned.

**

** Note that this function does endian conversion on the

** returned message.  This is necessary because the Am29000

** target will be sending big-endian messages and the PC will

** be expecting little-endian.

*/

INT32

msg_recv_pceb(msg_ptr, PC_port_base, Mode)

   union  msg_t  *msg_ptr;

   INT32  PC_port_base;

   INT32        Mode;

   {

   INT32    result1;

   INT32    result2;

   INT32    result3;

   ADDR32 recv_buf_addr;

   INT32  parms_length;

   INT32  header_size;

   INT32  semaphore;

   /* Get receive buffer address */

   result1 = Mini_read_memory ((INT32)  D_MEM,

                              (ADDR32) PCEB_RECV_BUF_PTR,

                              (INT32)  sizeof(ADDR32),

                              (BYTE *) &recv_buf_addr);

   /* Change endian of recv_buf_addr */

   if (tip_target_config.TipEndian != tip_target_config.P29KEndian)

      tip_convert32((BYTE *) &recv_buf_addr);

   /* Return if there is no message */

   if (recv_buf_addr == 0) {

      return(-1);

      } else {

         /* Get message header */

         header_size = (INT32) (2 * sizeof(INT32));

         result1 = Mini_read_memory ((INT32)  D_MEM,

                                    (ADDR32) recv_buf_addr,

                                    (INT32)  header_size,

                                    (BYTE *) msg_ptr);

         /* Get rest of message */

         parms_length = (msg_ptr->generic_msg).length;

         if (tip_target_config.TipEndian != tip_target_config.P29KEndian)

            tip_convert32((BYTE *) &parms_length);

         result2 = Mini_read_memory ((INT32)  D_MEM,

                                    (ADDR32) (recv_buf_addr + header_size),

                                    (INT32)  parms_length,

                                    (BYTE *) &(msg_ptr->generic_msg.byte));

         /* Do endian conversion */

         if (tip_target_config.TipEndian != tip_target_config.P29KEndian)

            endian_cvt(msg_ptr, INCOMING_MSG);

         /* Set semaphore (PCEB_RECV_BUF_PTR) to zero */

           semaphore = (INT32) 0;

           result3 = Mini_write_memory ((INT32)   D_MEM,

                                      (ADDR32) PCEB_RECV_BUF_PTR,

                                      (INT32)  sizeof(INT32),

                                      (BYTE *) &semaphore);

      }

   /* Did everything go ok? */

   if ((result1 != (INT32) 0) ||

       (result2 != (INT32) 0) ||

       (result3 != (INT32) 0))

         return(-1);

      else

         return(msg_ptr->generic_msg.code);

   }  /* end msg_recv_pceb() */

/*

** This function is used to close the communication

** channel.  This is used when resyncing the host and

** target and when exiting the monitor.

*/

INT32

exit_comm_pceb(PC_port_base, PC_mem_seg)

INT32   PC_port_base;

INT32   PC_mem_seg;

   {

     return (0);

   }

INT32

reset_comm_pceb(PC_port_base, PC_mem_seg)

INT32   PC_port_base;

INT32   PC_mem_seg;

   {

   return(0);

   }  /* end reset_comm_pceb() */

/*

** This function is used to "kick" the PCEB.  This

** amounts to yanking the *RESET line low.  Code

** will begin execution at ROM address 0.

*/

void

go_pceb(PC_port_base, PC_mem_seg)

INT32   PC_port_base;

INT32   PC_mem_seg;

   {

   int  setup;

   /* Reset processor */

   setup = (PCEB_LB_END | PCEB_WINENA);

   outp((unsigned int) (PC_port_base + PCEB_PC229K_OFFSET),

        (int) (setup | PCEB_S_RESET | PCEB_S_HALT));

   outp((unsigned int) (PC_port_base + PCEB_PC229K_OFFSET),

        (int) (setup | PCEB_S_RESET | PCEB_S_NORMAL));

   outp((unsigned int) (PC_port_base + PCEB_PC229K_OFFSET),

        (int ) (setup | PCEB_S_NORMAL));

   }  /* end go_pceb() */

/*

** This function is used to write a string of bytes to

** the Am29000 memory on the PCEB board.

**

** For more information on the PCEB interface, see

** Chapter 5 of the "PCEB User's Manual".

**

** Note:  This function aligns all 16 1K byte windows to make

** a single 16K byte window on a 1K boundary.

*/

INT32

write_memory_pceb(memory_space, address, data, byte_count, PC_port_base,

                  PC_mem_seg)

   INT32    memory_space;

   ADDR32   address;

   BYTE    *data;

   INT32    byte_count;

   INT32        PC_port_base;

   INT32        PC_mem_seg;

   {

   INT32  i;

   ADDR32 temp_address;

   INT32  bytes_in_window;

   INT32  copy_count;

   while (byte_count > 0) {

      /* Set up a single, contiguous 16K window (on a 1K boundary) */

      temp_address = address;

      for (i=0; i<16; i=i+1) {

         /* Write out low PCEB addr bits */

         outp((unsigned int) (PC_port_base+(INT32) (2*i)),

              (int) ((temp_address >> 10) & 0xff));

         /* Write out high PCEB addr bits */

         outp((unsigned int) (PC_port_base+(INT32) (2*i)+(INT32) 1),

              (int) ((temp_address >> 18) & 0x1f));

         temp_address = temp_address + (ADDR32) 0x400;

         }  /* end for */

      bytes_in_window = (INT32) 0x4000 - (address & 0x3ff);

      copy_count = (byte_count < bytes_in_window) ? byte_count : bytes_in_window;

      (void) movedata((unsigned int) FP_SEG(data),

                      (unsigned int) FP_OFF(data),

                      (unsigned int) PC_mem_seg,

                      (unsigned int) (address & 0x3ff),

                      (int) copy_count);

      data = data + copy_count;

      address = address + copy_count;

      byte_count = byte_count - copy_count;

      }  /* end while loop */

   return(0);

   }  /* End write_memory_pceb() */

/*

** This function is used to read a string of bytes from

** the Am29000 memory on the PCEB board.   A zero is

** returned if the data is read successfully, otherwise

** a -1 is returned.

**

** For more information on the PCEB interface, see

** Chapter 5 of the "PCEB User's Manual".

**

** Note:  This function aligns all 16 1K byte windows to make

** a single 16K byte window on a 1K boundary.

*/

INT32

read_memory_pceb(memory_space, address, data, byte_count, PC_port_base,

                 PC_mem_seg)

   INT32    memory_space;

   ADDR32   address;

   BYTE    *data;

   INT32    byte_count;

   INT32        PC_port_base;

   INT32        PC_mem_seg;

   {

   INT32  i;

   ADDR32 temp_address;

   INT32  bytes_in_window;

   INT32  copy_count;

   while (byte_count > 0) {

      /* Set up a single, contiguous 16K window (on a 1K boundary) */

      temp_address = address;

      for (i=0; i<16; i=i+1) {

         /* Write out low PCEB addr bits */

         outp((unsigned int) (PC_port_base+(2*i)),

              (int) ((temp_address >> 10) & 0xff));

         /* Write out high PCEB addr bits */

         outp((unsigned int) (PC_port_base+(2*i)+(INT32) 1),

              (int) ((temp_address >> 18) & 0x1f));

         temp_address = temp_address + (ADDR32) 0x400;

         }  /* end for */

      bytes_in_window = (INT32) 0x4000 - (address & 0x3ff);

      copy_count = (byte_count < bytes_in_window) ? byte_count : bytes_in_window;

      (void) movedata((unsigned int) PC_mem_seg,

                      (unsigned int) (address & 0x3ff),

                      (unsigned int) FP_SEG(data),

                      (unsigned int) FP_OFF(data),

                      (int) copy_count);

      data = data + copy_count;

      address = address + copy_count;

      byte_count = byte_count - copy_count;

      }  /* end while loop */

   return(0);

   }  /* End read_memory_pceb() */

INT32

fill_memory_pceb()

{

  return(0);

}