update cortex-M4 libcpu

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1773 bbd45198-f89e-11dd-88c7-29a3b14d5316

libcpu/arm/cortex-m4/cpuport.c

-/*
- * File      : cpuport.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2009 - 2011, 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://www.rt-thread.org/license/LICENSE
- *
- * Change Logs:
- * Date           Author       Notes
- * 2006-08-23     Bernard      the first version
- * 2011-06-03     Bernard      merge all of C source code into cpuport.c
- */
-#include <rtthread.h>
-
-/* exception and interrupt handler table */
-rt_uint32_t rt_interrupt_from_thread, rt_interrupt_to_thread;
-rt_uint32_t rt_thread_switch_interrupt_flag;
-
-struct stack_contex
-{
-	rt_uint32_t r0;
-	rt_uint32_t r1;
-	rt_uint32_t r2;
-	rt_uint32_t r3;
-	rt_uint32_t r12;
-	rt_uint32_t lr;
-	rt_uint32_t pc;
-	rt_uint32_t psr;
-};
-
-rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter,
-	rt_uint8_t *stack_addr, void *texit)
-{
-	unsigned long *stk;
-
-	stk 	 = (unsigned long *)stack_addr;
-	*(stk)   = 0x01000000L;					/* PSR */
-	*(--stk) = (unsigned long)tentry;		/* entry point, pc */
-	*(--stk) = (unsigned long)texit;		/* lr */
-	*(--stk) = 0;							/* r12 */
-	*(--stk) = 0;							/* r3 */
-	*(--stk) = 0;							/* r2 */
-	*(--stk) = 0;							/* r1 */
-	*(--stk) = (unsigned long)parameter;	/* r0 : argument */
-
-	*(--stk) = 0;							/* r11 */
-	*(--stk) = 0;							/* r10 */
-	*(--stk) = 0;							/* r9 */
-	*(--stk) = 0;							/* r8 */
-	*(--stk) = 0;							/* r7 */
-	*(--stk) = 0;							/* r6 */
-	*(--stk) = 0;							/* r5 */
-	*(--stk) = 0;							/* r4 */
-
-	/* return task's current stack address */
-	return (rt_uint8_t *)stk;
-}
-
-extern void rt_hw_interrupt_thread_switch(void);
-extern void list_thread(void);
-extern rt_thread_t rt_current_thread;
-void rt_hw_hard_fault_exception(struct stack_contex* contex)
-{
-	rt_kprintf("psr: 0x%08x\n", contex->psr);
-	rt_kprintf(" pc: 0x%08x\n", contex->pc);
-	rt_kprintf(" lr: 0x%08x\n", contex->lr);
-	rt_kprintf("r12: 0x%08x\n", contex->r12);
-	rt_kprintf("r03: 0x%08x\n", contex->r3);
-	rt_kprintf("r02: 0x%08x\n", contex->r2);
-	rt_kprintf("r01: 0x%08x\n", contex->r1);
-	rt_kprintf("r00: 0x%08x\n", contex->r0);
-
-	rt_kprintf("hard fault on thread: %s\n", rt_current_thread->name);
-#ifdef RT_USING_FINSH
-	list_thread();
-#endif
-	while (1);
-}
-
-void rt_hw_cpu_shutdown()
-{
-	rt_kprintf("shutdown...\n");
-
-	RT_ASSERT(0);
-}
+/*
+ * File      : cpuport.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2009 - 2011, 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://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2006-08-23     Bernard      the first version
+ * 2011-06-03     Bernard      merge all of C source code into cpuport.c
+ */
+#include <rtthread.h>
+
+/* exception and interrupt handler table */
+rt_uint32_t rt_interrupt_from_thread, rt_interrupt_to_thread;
+rt_uint32_t rt_thread_switch_interrupt_flag;
+
+struct stack_contex
+{
+	rt_uint32_t r0;
+	rt_uint32_t r1;
+	rt_uint32_t r2;
+	rt_uint32_t r3;
+	rt_uint32_t r12;
+	rt_uint32_t lr;
+	rt_uint32_t pc;
+	rt_uint32_t psr;
+};
+
+struct stack_contex_fpu
+{
+	rt_uint32_t r0;
+	rt_uint32_t r1;
+	rt_uint32_t r2;
+	rt_uint32_t r3;
+	rt_uint32_t r12;
+	rt_uint32_t lr;
+	rt_uint32_t pc;
+	rt_uint32_t psr;
+	/* FPU register */
+	rt_uint32_t S0;
+	rt_uint32_t S1;
+	rt_uint32_t S2;
+	rt_uint32_t S3;
+	rt_uint32_t S4;
+	rt_uint32_t S5;
+	rt_uint32_t S6;
+	rt_uint32_t S7;
+	rt_uint32_t S8;
+	rt_uint32_t S9;
+	rt_uint32_t S10;
+	rt_uint32_t S11;
+	rt_uint32_t S12;
+	rt_uint32_t S13;
+	rt_uint32_t S14;
+	rt_uint32_t S15;
+	rt_uint32_t FPSCR;
+	rt_uint32_t NO_NAME;
+};
+
+rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter,
+	rt_uint8_t *stack_addr, void *texit)
+{
+	unsigned long *stk;
+	struct stack_contex_fpu * stack_contex_fpu;
+
+	stk 	 = (unsigned long *)stack_addr;
+
+	stk -= sizeof(struct stack_contex_fpu);
+	stack_contex_fpu = (struct stack_contex_fpu *)stk;
+	stack_contex_fpu->r0 = (unsigned long)parameter; /* r0 : argument */
+	stack_contex_fpu->r1 = 0;                        /* r1 */
+	stack_contex_fpu->r2 = 0;                        /* r2 */
+	stack_contex_fpu->r3 = 0;                        /* r3 */
+	stack_contex_fpu->r12 = 0;                       /* r12 */
+	stack_contex_fpu->lr = (unsigned long)texit;     /* lr */
+	stack_contex_fpu->pc = (unsigned long)tentry;    /* entry point, pc */
+	stack_contex_fpu->psr = 0x01000000L;             /* PSR */
+
+	*(--stk) = 0;							/* r11 */
+	*(--stk) = 0;							/* r10 */
+	*(--stk) = 0;							/* r9 */
+	*(--stk) = 0;							/* r8 */
+	*(--stk) = 0;							/* r7 */
+	*(--stk) = 0;							/* r6 */
+	*(--stk) = 0;							/* r5 */
+	*(--stk) = 0;							/* r4 */
+
+	/* return task's current stack address */
+	return (rt_uint8_t *)stk;
+}
+
+extern void rt_hw_interrupt_thread_switch(void);
+extern void list_thread(void);
+extern rt_thread_t rt_current_thread;
+void rt_hw_hard_fault_exception(struct stack_contex* contex)
+{
+	rt_kprintf("psr: 0x%08x\n", contex->psr);
+	rt_kprintf(" pc: 0x%08x\n", contex->pc);
+	rt_kprintf(" lr: 0x%08x\n", contex->lr);
+	rt_kprintf("r12: 0x%08x\n", contex->r12);
+	rt_kprintf("r03: 0x%08x\n", contex->r3);
+	rt_kprintf("r02: 0x%08x\n", contex->r2);
+	rt_kprintf("r01: 0x%08x\n", contex->r1);
+	rt_kprintf("r00: 0x%08x\n", contex->r0);
+
+	rt_kprintf("hard fault on thread: %s\n", rt_current_thread->name);
+#ifdef RT_USING_FINSH
+	list_thread();
+#endif
+	while (1);
+}
+
+void rt_hw_cpu_shutdown()
+{
+	rt_kprintf("shutdown...\n");
+
+	RT_ASSERT(0);
+}