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+++ b/packages/devs/wallclock/sh3/current/src/wallclock_sh3.cxx
@@ -0,0 +1,168 @@
+//==========================================================================
+//
+//      devs/wallclock/sh3.cxx
+//
+//      Wallclock emulation implementation
+//
+//==========================================================================
+//####COPYRIGHTBEGIN####
+//                                                                          
+// -------------------------------------------                              
+// The contents of this file are subject to the Red Hat eCos Public License 
+// Version 1.1 (the "License"); you may not use this file except in         
+// compliance with the License.  You may obtain a copy of the License at    
+// http://www.redhat.com/                                                   
+//                                                                          
+// 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 Configurable Operating System,      
+// released September 30, 1998.                                             
+//                                                                          
+// The Initial Developer of the Original Code is Red Hat.                   
+// Portions created by Red Hat are                                          
+// Copyright (C) 1998, 1999, 2000 Red Hat, Inc.                             
+// All Rights Reserved.                                                     
+// -------------------------------------------                              
+//                                                                          
+//####COPYRIGHTEND####
+//==========================================================================
+//#####DESCRIPTIONBEGIN####
+//
+// Author(s):     jskov
+// Contributors:  jskov
+// Date:          2000-03-17
+// Purpose:       Wallclock driver for SH3 CPU RTC module
+//
+//####DESCRIPTIONEND####
+//
+//==========================================================================
+
+#include <pkgconf/kernel.h>             // Kernel config
+#include <pkgconf/wallclock.h>          // Wallclock device config
+
+#include <cyg/infra/cyg_type.h>         // Common type definitions and support
+
+#define __CYGBLD_DRIVER_PRIVATE
+#include <cyg/io/wallclock.hxx>         // The WallClock API
+
+#include <cyg/hal/sh_regs.h>            // RTC register definitions
+
+#include <cyg/hal/hal_io.h>             // IO macros
+
+#include <cyg/infra/diag.h>             // For debugging
+
+
+
+//-----------------------------------------------------------------------------
+// Functions for setting and getting the hardware clock counters
+
+// Year must be last two digits of "western calendar year". Leap year when
+// divisible by four.
+static void
+set_sh3_hwclock(cyg_uint32 year, cyg_uint32 month, cyg_uint32 mday,
+                cyg_uint32 hour, cyg_uint32 minute, cyg_uint32 second)
+{
+    // Stop RTC
+    HAL_WRITE_UINT8(CYGARC_REG_RCR2, CYGARC_REG_RCR2_RESET);
+
+    // Program it
+    HAL_WRITE_UINT8(CYGARC_REG_RYRCNT,  TO_BCD(year));
+    HAL_WRITE_UINT8(CYGARC_REG_RMONCNT, TO_BCD(month));
+    HAL_WRITE_UINT8(CYGARC_REG_RDAYCNT, TO_BCD(mday));
+    HAL_WRITE_UINT8(CYGARC_REG_RHRCNT,  TO_BCD(hour));
+    HAL_WRITE_UINT8(CYGARC_REG_RMINCNT, TO_BCD(minute));
+    HAL_WRITE_UINT8(CYGARC_REG_RSECCNT, TO_BCD(second));
+
+    // Start RTC
+    HAL_WRITE_UINT8(CYGARC_REG_RCR1, CYGARC_REG_RCR1_CIE);
+    HAL_WRITE_UINT8(CYGARC_REG_RCR2, 
+                    CYGARC_REG_RCR2_RTCEN | CYGARC_REG_RCR2_START);
+
+}
+
+static void
+get_sh3_hwclock(cyg_uint32* year, cyg_uint32* month, cyg_uint32* mday,
+                cyg_uint32* hour, cyg_uint32* minute, cyg_uint32* second)
+{
+    cyg_uint8 tmp;
+
+    do {
+        // Clear carry flag
+        HAL_WRITE_UINT8(CYGARC_REG_RCR1, 0);
+        
+        // Read time
+        HAL_READ_UINT8(CYGARC_REG_RYRCNT, tmp);
+        *year = TO_DEC(tmp);
+        HAL_READ_UINT8(CYGARC_REG_RMONCNT, tmp);
+        *month = TO_DEC(tmp);
+        HAL_READ_UINT8(CYGARC_REG_RDAYCNT, tmp);
+        *mday = TO_DEC(tmp);
+        HAL_READ_UINT8(CYGARC_REG_RHRCNT, tmp);
+        *hour = TO_DEC(tmp);
+        HAL_READ_UINT8(CYGARC_REG_RMINCNT, tmp);
+        *minute = TO_DEC(tmp);
+        HAL_READ_UINT8(CYGARC_REG_RSECCNT, tmp);
+        *second = TO_DEC(tmp);
+
+        // Read carry flag
+        HAL_READ_UINT8(CYGARC_REG_RCR1, tmp);
+    } while (CYGARC_REG_RCR1_CF & tmp); // loop if carry set
+}
+
+//-----------------------------------------------------------------------------
+// Functions required for the hardware-driver API.
+
+// Returns the number of seconds elapsed since 1970-01-01 00:00:00.
+cyg_uint32 
+Cyg_WallClock::get_hw_seconds(void)
+{
+    cyg_uint32 year, month, mday, hour, minute, second;
+
+    get_sh3_hwclock(&year, &month, &mday, &hour, &minute, &second);
+
+#if 0
+    // This will cause the test to eventually fail due to these printouts
+    // causing timer interrupts to be lost...
+    diag_printf("year %02d\n", year);
+    diag_printf("month %02d\n", month);
+    diag_printf("mday %02d\n", mday);
+    diag_printf("hour %02d\n", hour);
+    diag_printf("minute %02d\n", minute);
+    diag_printf("second %02d\n", second);
+#endif
+
+#ifndef CYGSEM_WALLCLOCK_SET_GET_MODE
+    // We know what we initialized the hardware for : 1970, so by doing this
+    // the returned time should be OK for 30 years uptime.
+    year += 1900;
+#else
+    // Need to use sliding window or similar to figure out what the
+    // century should be... Patent issue is unclear, and since there's
+    // no battery backup of the clock, there's little point in
+    // investigating.
+# error "Need some magic here to figure out century counter"
+#endif
+
+    cyg_uint32 now = _simple_mktime(year, month, mday, hour, minute, second);
+    return now;
+}
+
+#ifndef CYGSEM_WALLCLOCK_SET_GET_MODE
+
+void
+Cyg_WallClock::init_hw_seconds(void)
+{
+    // This is our base: 1970-01-01 00:00:00
+    // Set the HW clock - if for nothing else, just to be sure it's in a
+    // legal range. Any arbitrary base could be used.
+    // After this the hardware clock is only read.
+    set_sh3_hwclock(70,1,1,0,0,0);
+}
+
+#endif // CYGSEM_WALLCLOCK_SET_GET_MODE
+
+//-----------------------------------------------------------------------------
+// End of devs/wallclock/sh3.cxx