1 files changed, 119 insertions, 0 deletions
diff --git a/misc/Obsoleted/arch/8051/src/up_initialstate.c b/misc/Obsoleted/arch/8051/src/up_initialstate.c
new file mode 100644
index 000000000..d0d568981
--- /dev/null
+++ b/misc/Obsoleted/arch/8051/src/up_initialstate.c
@@ -0,0 +1,119 @@
+/************************************************************************
+ * up_initialstate.c
+ *
+ *   Copyright (C) 2007, 2009 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ************************************************************************/
+
+/************************************************************************
+ * Included Files
+ ************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <sched.h>
+
+#include "up_internal.h"
+
+/************************************************************************
+ * Private Definitions
+ ************************************************************************/
+
+/************************************************************************
+ * Private Data
+ ************************************************************************/
+
+/************************************************************************
+ * Private Functions
+ ************************************************************************/
+
+/************************************************************************
+ * Public Functions
+ ************************************************************************/
+
+/************************************************************************
+ * Name: up_initial_state
+ *
+ * Description:
+ *   A new thread is being started and a new TCB
+ *   has been created. This function is called to initialize
+ *   the processor specific portions of the new TCB.
+ *
+ *   This function must setup the intial architecture registers
+ *   and/or  stack so that execution will begin at tcb->start
+ *   on the next context switch.
+ *
+ ************************************************************************/
+
+void up_initial_state(FAR struct tcb_s *tcb)
+{
+  FAR uint8_t *frame = tcb->xcp.stack;
+  FAR uint8_t *regs  = tcb->xcp.regs;
+
+  /* This is the form of initial stack frame
+   *
+   * This initial stack frame will be configured to hold.
+   * (1) The 16-bit return address of either:
+   *
+   *     void task_start(void);
+   *     void pthread_start(void)
+   *
+   *     The return address is stored at the top of stack.
+   *     so that the RETI instruction will work:
+   *
+   *     PC15-8 <- ((SP))
+   *     (SP)   <- (SP) -1
+   *     PC7-0  <- ((SP))
+   *     (SP)   <- (SP) -1
+   */
+
+   frame[FRAME_RETLS] = (((uint16_t)tcb->start) & 0xff);
+   frame[FRAME_RETMS] = (((uint16_t)tcb->start) >> 8);
+
+  /* The context save area for registers a, ie, and dpstr
+   * follows the return address in the stack frame.
+   */
+
+  frame[FRAME_IE] = 0x80;
+
+  /* Save the number of bytes in the frame (which will be used
+   * to initialize the stack pointer when the task is started).
+   */
+
+  tcb->xcp.nbytes = FRAME_SIZE;
+
+  /* Initialize the remaining register save area which is
+   * outside of the stack save area.
+   */
+
+  tcb->xcp.regs[REGS_PSW] = 0;
+}