new file mode 100644
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+++ b/packages/hal/arm/cma230/current/src/plf_stub.c
@@ -0,0 +1,276 @@
+//=============================================================================
+//
+//      plf_stub.c
+//
+//      Platform specific code for GDB stub support.
+//
+//=============================================================================
+//####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):   gthomas (based on the old ARM/CMA230 hal_stub.c)
+// Contributors:gthomas, jskov
+// Date:        1999-02-15
+// Purpose:     Platform specific code for GDB stub support.
+//              
+//####DESCRIPTIONEND####
+//
+//=============================================================================
+
+#include <pkgconf/hal.h>
+
+#ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
+
+#include <cyg/hal/hal_stub.h>
+
+#include <cyg/hal/hal_io.h>             // HAL IO macros
+#ifdef CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT
+#include <cyg/hal/hal_intr.h>           // HAL interrupt macros
+#include <cyg/hal/drv_api.h>            // HAL ISR support
+#endif
+
+#include <cyg/hal/hal_cma230.h>
+
+//-----------------------------------------------------------------------------
+// Serial definitions.
+#if CYGHWR_HAL_ARM_CMA230_GDB_PORT==0
+// This is the base address of the A-channel
+#define CYG_DEVICE_SERIAL_RS232_16550_BASE      CMA101_DUARTA
+#define CYG_DEVICE_SERIAL_INT                   CYGNUM_HAL_INTERRUPT_SERIAL_A
+#else
+// This is the base address of the B-channel
+#define CYG_DEVICE_SERIAL_RS232_16550_BASE      CMA101_DUARTB
+#define CYG_DEVICE_SERIAL_INT                   CYGNUM_HAL_INTERRUPT_SERIAL_B
+#endif
+
+// Based on 3.6864 MHz xtal
+#if CYGHWR_HAL_ARM_CMA230_DIAG_BAUD==9600
+#define CYG_DEVICE_SERIAL_RS232_BAUD_MSB        0x00
+#define CYG_DEVICE_SERIAL_RS232_BAUD_LSB        0x18
+#endif
+#if CYGHWR_HAL_ARM_CMA230_DIAG_BAUD==19200
+#define CYG_DEVICE_SERIAL_RS232_BAUD_MSB        0x00
+#define CYG_DEVICE_SERIAL_RS232_BAUD_LSB        0x0C
+#endif
+#if CYGHWR_HAL_ARM_CMA230_DIAG_BAUD==38400
+#define CYG_DEVICE_SERIAL_RS232_BAUD_MSB        0x00
+#define CYG_DEVICE_SERIAL_RS232_BAUD_LSB        0x06
+#endif
+#if CYGHWR_HAL_ARM_CMA230_DIAG_BAUD==115200
+#define CYG_DEVICE_SERIAL_RS232_BAUD_MSB        0x00
+#define CYG_DEVICE_SERIAL_RS232_BAUD_LSB        0x02
+#endif
+
+#ifndef CYG_DEVICE_SERIAL_RS232_BAUD_MSB
+#error Missing/incorrect serial baud rate defined - CDL error?
+#endif
+
+// Define the serial registers.
+#define CYG_DEVICE_SERIAL_RS232_16550_RBR \
+    ((volatile cyg_uint8 *) CYG_DEVICE_SERIAL_RS232_16550_BASE + 0x00)
+    // receiver buffer register, read, dlab = 0
+#define CYG_DEVICE_SERIAL_RS232_16550_THR \
+    ((volatile cyg_uint8 *) CYG_DEVICE_SERIAL_RS232_16550_BASE + 0x00)
+    // transmitter holding register, write, dlab = 0
+#define CYG_DEVICE_SERIAL_RS232_16550_DLL \
+    ((volatile cyg_uint8 *) CYG_DEVICE_SERIAL_RS232_16550_BASE + 0x00)
+    // divisor latch (LS), read/write, dlab = 1
+#define CYG_DEVICE_SERIAL_RS232_16550_IER \
+    ((volatile cyg_uint8 *) CYG_DEVICE_SERIAL_RS232_16550_BASE + 0x08)
+    // interrupt enable register, read/write, dlab = 0
+#define CYG_DEVICE_SERIAL_RS232_16550_DLM \
+    ((volatile cyg_uint8 *) CYG_DEVICE_SERIAL_RS232_16550_BASE + 0x08)
+    // divisor latch (MS), read/write, dlab = 1
+#define CYG_DEVICE_SERIAL_RS232_16550_IIR \
+    ((volatile cyg_uint8 *) CYG_DEVICE_SERIAL_RS232_16550_BASE + 0x10)
+    // interrupt identification register, read, dlab = 0
+#define CYG_DEVICE_SERIAL_RS232_16550_FCR \
+    ((volatile cyg_uint8 *) CYG_DEVICE_SERIAL_RS232_16550_BASE + 0x10)
+    // fifo control register, write, dlab = 0
+#define CYG_DEVICE_SERIAL_RS232_16550_LCR \
+    ((volatile cyg_uint8 *) CYG_DEVICE_SERIAL_RS232_16550_BASE + 0x18)
+    // line control register, read/write
+#define CYG_DEVICE_SERIAL_RS232_16550_MCR \
+    ((volatile cyg_uint8 *) CYG_DEVICE_SERIAL_RS232_16550_BASE + 0x20)
+    // modem control register, read/write
+#define CYG_DEVICE_SERIAL_RS232_16550_LSR \
+    ((volatile cyg_uint8 *) CYG_DEVICE_SERIAL_RS232_16550_BASE + 0x28)
+    // line status register, read
+#define CYG_DEVICE_SERIAL_RS232_16550_MSR \
+    ((volatile cyg_uint8 *) CYG_DEVICE_SERIAL_RS232_16550_BASE + 0x30)
+    // modem status register, read
+
+// The interrupt enable register bits.
+#define SIO_IER_ERDAI   0x01            // enable received data available irq
+#define SIO_IER_ETHREI  0x02            // enable THR empty interrupt
+#define SIO_IER_ELSI    0x04            // enable receiver line status irq
+#define SIO_IER_EMSI    0x08            // enable modem status interrupt
+
+// The interrupt identification register bits.
+#define SIO_IIR_IP      0x01            // 0 if interrupt pending
+#define SIO_IIR_ID_MASK 0x0e            // mask for interrupt ID bits
+
+// The line status register bits.
+#define SIO_LSR_DR      0x01            // data ready
+#define SIO_LSR_OE      0x02            // overrun error
+#define SIO_LSR_PE      0x04            // parity error
+#define SIO_LSR_FE      0x08            // framing error
+#define SIO_LSR_BI      0x10            // break interrupt
+#define SIO_LSR_THRE    0x20            // transmitter holding register empty
+#define SIO_LSR_TEMT    0x40            // transmitter register empty
+#define SIO_LSR_ERR     0x80            // any error condition
+
+// The modem status register bits.
+#define SIO_MSR_DCTS  0x01              // delta clear to send
+#define SIO_MSR_DDSR  0x02              // delta data set ready
+#define SIO_MSR_TERI  0x04              // trailing edge ring indicator
+#define SIO_MSR_DDCD  0x08              // delta data carrier detect
+#define SIO_MSR_CTS   0x10              // clear to send
+#define SIO_MSR_DSR   0x20              // data set ready
+#define SIO_MSR_RI    0x40              // ring indicator
+#define SIO_MSR_DCD   0x80              // data carrier detect
+
+// The line control register bits.
+#define SIO_LCR_WLS0   0x01             // word length select bit 0
+#define SIO_LCR_WLS1   0x02             // word length select bit 1
+#define SIO_LCR_STB    0x04             // number of stop bits
+#define SIO_LCR_PEN    0x08             // parity enable
+#define SIO_LCR_EPS    0x10             // even parity select
+#define SIO_LCR_SP     0x20             // stick parity
+#define SIO_LCR_SB     0x40             // set break
+#define SIO_LCR_DLAB   0x80             // divisor latch access bit
+
+// Interrupt Enable Register
+#define SIO_IER_RCV 0x01
+#define SIO_IER_XMT 0x02
+#define SIO_IER_LS  0x04
+#define SIO_IER_MS  0x08
+
+// Modem Control Register
+#define SIO_MCR_DTR 0x01
+#define SIO_MCR_RTS 0x02
+#define SIO_MCR_INT 0x08   // Enable interrupts
+
+#ifdef CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT
+static cyg_interrupt gdb_interrupt;
+static cyg_handle_t  gdb_interrupt_handle;
+#endif
+
+//-----------------------------------------------------------------------------
+#ifdef CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT
+// This ISR is called only for serial receive interrupts.
+int 
+cyg_hal_gdb_isr(cyg_vector_t vector, cyg_addrword_t data, HAL_SavedRegisters *regs)
+{
+    cyg_uint8 c;
+
+    c = hal_cma230_get_char();  // Fetch the character
+    if( 3 == c ) {  // ^C
+        // Ctrl-C: set a breakpoint at PC so GDB will display the
+        // correct program context when stopping rather than the
+        // interrupt handler.
+        cyg_hal_gdb_interrupt (regs->pc);
+        cyg_drv_interrupt_acknowledge(CYG_DEVICE_SERIAL_INT);
+    }
+    return 0;  // No need to run DSR
+}
+
+int 
+hal_cma230_interruptible(int state)
+{
+    if (state) {
+        cyg_drv_interrupt_unmask(CYG_DEVICE_SERIAL_INT);
+    } else {
+        cyg_drv_interrupt_mask(CYG_DEVICE_SERIAL_INT);
+    }
+
+    return 0;
+}
+#endif
+
+// Initialize the current serial port.
+void hal_cma230_init_serial(void)
+{
+    cyg_uint8 lcr;
+
+    // 8-1-no parity.
+    HAL_WRITE_UINT8 (CYG_DEVICE_SERIAL_RS232_16550_LCR,
+                     SIO_LCR_WLS0 | SIO_LCR_WLS1);
+
+    HAL_READ_UINT8 (CYG_DEVICE_SERIAL_RS232_16550_LCR, lcr);
+    lcr |= SIO_LCR_DLAB;
+    HAL_WRITE_UINT8 (CYG_DEVICE_SERIAL_RS232_16550_LCR, lcr);
+    HAL_WRITE_UINT8 (CYG_DEVICE_SERIAL_RS232_16550_DLL,
+                     CYG_DEVICE_SERIAL_RS232_BAUD_LSB);
+    HAL_WRITE_UINT8 (CYG_DEVICE_SERIAL_RS232_16550_DLM,
+                     CYG_DEVICE_SERIAL_RS232_BAUD_MSB);
+    lcr &= ~SIO_LCR_DLAB;
+    HAL_WRITE_UINT8 (CYG_DEVICE_SERIAL_RS232_16550_LCR, lcr);
+    HAL_WRITE_UINT8 (CYG_DEVICE_SERIAL_RS232_16550_FCR, 0x07);  // Enable & clear FIFO
+
+#ifdef CYGDBG_HAL_DEBUG_GDB_BREAK_SUPPORT
+    cyg_drv_interrupt_create(CYG_DEVICE_SERIAL_INT,
+                             99,                     // Priority - what goes here?
+                             0,                      //  Data item passed to interrupt handler
+                             cyg_hal_gdb_isr,
+                             0,
+                             &gdb_interrupt_handle,
+                             &gdb_interrupt);
+    cyg_drv_interrupt_attach(gdb_interrupt_handle);
+    cyg_drv_interrupt_unmask(CYG_DEVICE_SERIAL_INT);
+    HAL_WRITE_UINT8 (CYG_DEVICE_SERIAL_RS232_16550_IER, SIO_IER_RCV);
+    HAL_WRITE_UINT8 (CYG_DEVICE_SERIAL_RS232_16550_MCR, SIO_MCR_INT|SIO_MCR_DTR|SIO_MCR_RTS);
+#endif
+}
+
+// Write C to the current serial port.
+void hal_cma230_put_char(int c)
+{
+    cyg_uint8 lsr;
+
+    do {
+        HAL_READ_UINT8 (CYG_DEVICE_SERIAL_RS232_16550_LSR, lsr);
+    } while ((lsr & SIO_LSR_THRE) == 0);
+
+    HAL_WRITE_UINT8 (CYG_DEVICE_SERIAL_RS232_16550_THR, c);
+}
+
+// Read one character from the current serial port.
+int hal_cma230_get_char(void)
+{
+    char c;
+    cyg_uint8 lsr;
+
+    do {
+        HAL_READ_UINT8 (CYG_DEVICE_SERIAL_RS232_16550_LSR, lsr);
+    } while ((lsr & SIO_LSR_DR) == 0);
+
+    HAL_READ_UINT8 (CYG_DEVICE_SERIAL_RS232_16550_RBR, c);
+    return c;
+}
+
+#endif // ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
+//-----------------------------------------------------------------------------
+// End of plf_stub.c