import lm3s, lpc2148/lpc2478, x86/qemu, AT91SAM7S/7X, s3c44b0, STM32F103ZE bsp

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@3 bbd45198-f89e-11dd-88c7-29a3b14d5316

libcpu/ia32/stack.c

@@ -0,0 +1,59 @@
+/*
+ * File      : stack.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://openlab.rt-thread.com/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
+ 
+#include <rtthread.h>
+
+#include <i386.h>
+
+/**
+ * @addtogroup I386
+ */
+/*@{*/
+
+/**
+ * This function will initialize thread stack
+ *
+ * @param tentry the entry of thread
+ * @param parameter the parameter of entry 
+ * @param stack_addr the beginning stack address
+ * @param texit the function will be called when thread exit
+ *
+ * @return stack address
+ */
+rt_uint8 *rt_hw_stack_init(void *tentry, void *parameter,
+	rt_uint8 *stack_addr, void *texit)
+{
+	unsigned long *stk;
+
+	stk = (unsigned long *)stack_addr;							
+	*(--stk) = (unsigned long)parameter;
+	*(--stk) = (unsigned long)texit;
+	*(--stk) = 0x200;						/*flags*/
+	*(--stk) = 0x08;						/*cs*/
+	*(--stk) = (unsigned long)tentry;		/*eip*/
+	*(--stk) = 0;							/*irqno*/
+	*(--stk) = 0x10;						/*ds*/
+	*(--stk) = 0x10;						/*es*/
+	*(--stk) = 0;							/*eax*/
+	*(--stk) = 0;							/*ecx*/
+	*(--stk) = 0;							/*edx*/
+	*(--stk) = 0;							/*ebx*/
+	*(--stk) = 0;							/*esp*/
+	*(--stk) = 0;							/*ebp*/
+	*(--stk) = 0;							/*esi*/
+	*(--stk) = 0;							/*edi*/
+
+	/* return task's current stack address */
+	return (rt_uint8 *)stk;
+}
+/*@}*/