new file mode 100644
--- /dev/null
+++ b/packages/hal/powerpc/mbx/current/src/hal_diag.c
@@ -0,0 +1,230 @@
+//=============================================================================
+//
+//      hal_diag.c
+//
+//      HAL diagnostic output code
+//
+//=============================================================================
+//####COPYRIGHTBEGIN####
+//
+// -------------------------------------------
+// The contents of this file are subject to the Cygnus eCos Public License
+// Version 1.0 (the "License"); you may not use this file except in
+// compliance with the License.  You may obtain a copy of the License at
+// http://sourceware.cygnus.com/ecos
+// 
+// Software distributed under the License is distributed on an "AS IS"
+// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the
+// License for the specific language governing rights and limitations under
+// the License.
+// 
+// The Original Code is eCos - Embedded Cygnus Operating System, released
+// September 30, 1998.
+// 
+// The Initial Developer of the Original Code is Cygnus.  Portions created
+// by Cygnus are Copyright (C) 1998,1999 Cygnus Solutions.  All Rights Reserved.
+// -------------------------------------------
+//
+//####COPYRIGHTEND####
+//=============================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):   hmt
+// Contributors:hmt
+// Date:        1999-06-08
+// Purpose:     HAL diagnostic output
+// Description: Implementations of HAL diagnostic output support.
+//
+//####DESCRIPTIONEND####
+//
+//=============================================================================
+
+#include <pkgconf/hal.h>
+
+#include <cyg/infra/cyg_type.h>         // base types
+#include <cyg/infra/cyg_trac.h>         // tracing macros
+#include <cyg/infra/cyg_ass.h>          // assertion macros
+
+#include <cyg/hal/hal_io.h>             // IO macros
+#include <cyg/hal/hal_diag.h>
+#include <cyg/hal/hal_intr.h>           // Interrupt macros
+
+#if defined(CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS)
+#include <cyg/hal/hal_stub.h>           // hal_output_gdb_string
+#endif
+
+#include <cyg/hal/ppc_regs.h>
+#include <cyg/hal/quicc/quicc_smc1.h>
+
+//-----------------------------------------------------------------------------
+// Select default diag channel to use
+
+//#define CYG_KERNEL_DIAG_ROMART
+//#define CYG_KERNEL_DIAG_SERIAL
+
+#if !defined(CYG_KERNEL_DIAG_SERIAL)
+#define CYG_KERNEL_DIAG_SERIAL
+#endif
+
+#ifdef CYGDBG_DIAG_BUF
+// Keep diag messages in a buffer for later [re]display
+
+int enable_diag_uart = 1;
+int enable_diag_buf = 1;
+static char diag_buf[40960*4];
+static int  diag_buf_ptr = 0;
+
+static void
+diag_putc(char c)
+{
+    if (enable_diag_buf) {
+        diag_buf[diag_buf_ptr++] = c;
+        if (diag_buf_ptr == sizeof(diag_buf)) diag_buf_ptr--;
+    }
+}
+
+void
+dump_diag_buf(int start, int len)
+{
+    int i;
+    enable_diag_uart = 1;
+    enable_diag_buf = 0;
+    if (len == 0) len = diag_buf_ptr;
+    diag_printf("\nDiag buf\n");
+    for (i = start;  i < len;  i++) {
+        hal_diag_write_char(diag_buf[i]);
+    }
+}
+#endif // CYGDBG_DIAG_BUF
+
+
+//-----------------------------------------------------------------------------
+// MBX board specific serial output; using GDB protocol by default:
+
+
+#if defined(CYG_KERNEL_DIAG_SERIAL)
+
+void hal_diag_init(void)
+{
+    static int init = 0;
+    if (init) return;
+    init++;
+    // init the actual serial port
+    cyg_quicc_init_smc1();
+#ifndef CYG_HAL_STARTUP_ROM
+    // We are talking to GDB; ack the "go" packet!
+    cyg_quicc_smc1_uart_putchar('+');
+#endif
+}
+
+void hal_diag_write_char_serial( char c )
+{
+    unsigned long __state;
+    HAL_DISABLE_INTERRUPTS(__state)
+    cyg_quicc_smc1_uart_putchar(c);
+    HAL_RESTORE_INTERRUPTS(__state);
+}
+
+#ifdef CYG_HAL_STARTUP_ROM
+void hal_diag_write_char(char c)
+{
+#ifdef CYGDBG_DIAG_BUF
+    diag_putc(c);
+    if (!enable_diag_uart) return;
+#endif // CYGDBG_DIAG_BUF
+    hal_diag_write_char_serial(c);
+}
+
+#else // RAM start so encode for GDB
+
+void hal_diag_write_char(char c)
+{
+    static char line[100];
+    static int pos = 0;
+
+#ifdef CYGDBG_DIAG_BUF
+    diag_putc(c);
+    if (!enable_diag_uart) return;
+#endif // CYGDBG_DIAG_BUF
+
+    // No need to send CRs
+    if( c == '\r' ) return;
+
+    line[pos++] = c;
+
+    if( c == '\n' || pos == sizeof(line) )
+    {
+        CYG_INTERRUPT_STATE old;
+
+        // Disable interrupts. This prevents GDB trying to interrupt us
+        // while we are in the middle of sending a packet. The serial
+        // receive interrupt will be seen when we re-enable interrupts
+        // later.
+        
+        HAL_DISABLE_INTERRUPTS(old);
+        
+        while(1)
+        {
+            static char hex[] = "0123456789ABCDEF";
+            cyg_uint8 csum = 0;
+            int i;
+        
+            hal_diag_write_char_serial('$');
+            hal_diag_write_char_serial('O');
+            csum += 'O';
+            for( i = 0; i < pos; i++ )
+            {
+                char ch = line[i];
+                char h = hex[(ch>>4)&0xF];
+                char l = hex[ch&0xF];
+                hal_diag_write_char_serial(h);
+                hal_diag_write_char_serial(l);
+                csum += h;
+                csum += l;
+            }
+            hal_diag_write_char_serial('#');
+            hal_diag_write_char_serial(hex[(csum>>4)&0xF]);
+            hal_diag_write_char_serial(hex[csum&0xF]);
+
+#ifndef CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT
+            // only gobble characters if no interrupt handler to grab ^Cs
+            // is installed (which is exclusive with device driver use)
+
+            // Wait for the ACK character '+' from GDB here and handle
+            // receiving a ^C instead.  This is the reason for this clause
+            // being a loop.
+            c = cyg_quicc_smc1_uart_rcvchar();
+
+            if( c == '+' )
+                break;              // a good acknowledge
+#if 0
+            if( c1 == 3 ) {
+                // Ctrl-C: breakpoint.
+                breakpoint();
+                break;
+            }
+#endif
+            // otherwise, loop round again
+#else
+            break;
+#endif
+        }
+        
+        pos = 0;
+
+        // And re-enable interrupts
+        HAL_RESTORE_INTERRUPTS(old);
+        
+    }
+}
+#endif // NOT def CYG_HAL_STARTUP_ROM
+
+
+void hal_diag_read_char(char *c)
+{
+    *c = cyg_quicc_smc1_uart_rcvchar();
+}
+
+#endif // CYG_KERNEL_DIAG_SERIAL
+
+// EOF hal_diag.c