86 lines
2.5 KiB
C
86 lines
2.5 KiB
C
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/*
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* File : cpu.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2009, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2010-01-25 Bernard first version
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* 2012-05-31 aozima Merge all of the C source code into cpuport.c
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*/
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#include <rtthread.h>
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struct stack_contex
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{
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rt_uint32_t r0;
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rt_uint32_t r1;
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rt_uint32_t r2;
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rt_uint32_t r3;
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rt_uint32_t r12;
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rt_uint32_t lr;
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rt_uint32_t pc;
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rt_uint32_t psr;
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};
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/* flag in interrupt handling */
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rt_uint32_t rt_interrupt_from_thread, rt_interrupt_to_thread;
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rt_uint32_t rt_thread_switch_interrupt_flag;
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/**
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* This function will initialize thread stack
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*
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* @param tentry the entry of thread
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* @param parameter the parameter of entry
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* @param stack_addr the beginning stack address
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* @param texit the function will be called when thread exit
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*
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* @return stack address
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*/
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rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter,
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rt_uint8_t *stack_addr, void *texit)
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{
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unsigned long *stk;
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stk = (unsigned long *)stack_addr;
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*(stk) = 0x01000000L; /* PSR */
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*(--stk) = (unsigned long)tentry; /* entry point, pc */
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*(--stk) = (unsigned long)texit; /* lr */
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*(--stk) = 0; /* r12 */
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*(--stk) = 0; /* r3 */
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*(--stk) = 0; /* r2 */
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*(--stk) = 0; /* r1 */
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*(--stk) = (unsigned long)parameter; /* r0 : argument */
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*(--stk) = 0; /* r7 */
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*(--stk) = 0; /* r6 */
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*(--stk) = 0; /* r5 */
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*(--stk) = 0; /* r4 */
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/* return task's current stack address */
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return (rt_uint8_t *)stk;
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}
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extern long list_thread(void);
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extern rt_thread_t rt_current_thread;
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void rt_hw_hard_fault_exception(struct stack_contex* contex)
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{
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rt_kprintf("psr: 0x%08x\n", contex->psr);
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rt_kprintf(" pc: 0x%08x\n", contex->pc);
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rt_kprintf(" lr: 0x%08x\n", contex->lr);
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rt_kprintf("r12: 0x%08x\n", contex->r12);
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rt_kprintf("r03: 0x%08x\n", contex->r3);
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rt_kprintf("r02: 0x%08x\n", contex->r2);
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rt_kprintf("r01: 0x%08x\n", contex->r1);
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rt_kprintf("r00: 0x%08x\n", contex->r0);
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rt_kprintf("hard fault on thread: %s\n", rt_current_thread->name);
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#ifdef RT_USING_FINSH
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list_thread();
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#endif
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while (1);
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}
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