97 lines
3.2 KiB
C
97 lines
3.2 KiB
C
|
/*
|
||
|
|
* 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://www.rt-thread.org/license/LICENSE
|
||
|
|
*
|
||
|
|
* Change Logs:
|
||
|
|
* Date Author Notes
|
||
|
|
* 2010-05-17 swkyer first version
|
||
|
|
* 2010-07-07 Bernard porting to Jz47xx
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <rtthread.h>
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @addtogroup Loongson SoC3210
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*@{*/
|
||
|
|
|
||
|
|
extern rt_uint32_t cp0_get_cause(void);
|
||
|
|
extern rt_uint32_t cp0_get_status(void);
|
||
|
|
extern rt_uint32_t cp0_get_hi(void);
|
||
|
|
extern rt_uint32_t cp0_get_lo(void);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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_t *rt_hw_stack_init(void *tentry, void *parameter, rt_uint8_t *stack_addr, void *texit)
|
||
|
|
{
|
||
|
|
rt_uint32_t *stk;
|
||
|
|
static rt_uint32_t g_sr = 0;
|
||
|
|
|
||
|
|
if (g_sr == 0)
|
||
|
|
{
|
||
|
|
g_sr = cp0_get_status();
|
||
|
|
g_sr &= 0xfffffffe;
|
||
|
|
g_sr |= 0x8401;
|
||
|
|
}
|
||
|
|
|
||
|
|
/** Start at stack top */
|
||
|
|
stk = (rt_uint32_t *)stack_addr;
|
||
|
|
*(stk) = (rt_uint32_t) tentry; /* pc: Entry Point */
|
||
|
|
*(--stk) = (rt_uint32_t) 0xeeee; /* c0_cause */
|
||
|
|
*(--stk) = (rt_uint32_t) 0xffff; /* c0_badvaddr */
|
||
|
|
*(--stk) = (rt_uint32_t) cp0_get_lo(); /* lo */
|
||
|
|
*(--stk) = (rt_uint32_t) cp0_get_hi(); /* hi */
|
||
|
|
*(--stk) = (rt_uint32_t) g_sr; /* C0_SR: HW2 = En, IE = En */
|
||
|
|
*(--stk) = (rt_uint32_t) texit; /* ra */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x0000001e; /* s8 */
|
||
|
|
*(--stk) = (rt_uint32_t) stack_addr; /* sp */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x0000001c; /* gp */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x0000001b; /* k1 */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x0000001a; /* k0 */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x00000019; /* t9 */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x00000018; /* t8 */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x00000017; /* s7 */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x00000016; /* s6 */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x00000015; /* s5 */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x00000014; /* s4 */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x00000013; /* s3 */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x00000012; /* s2 */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x00000011; /* s1 */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x00000010; /* s0 */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x0000000f; /* t7 */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x0000000e; /* t6 */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x0000000d; /* t5 */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x0000000c; /* t4 */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x0000000b; /* t3 */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x0000000a; /* t2 */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x00000009; /* t1 */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x00000008; /* t0 */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x00000007; /* a3 */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x00000006; /* a2 */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x00000005; /* a1 */
|
||
|
|
*(--stk) = (rt_uint32_t) parameter; /* a0 */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x00000003; /* v1 */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x00000002; /* v0 */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x00000001; /* at */
|
||
|
|
*(--stk) = (rt_uint32_t) 0x00000000; /* zero */
|
||
|
|
|
||
|
|
/* return task's current stack address */
|
||
|
|
return (rt_uint8_t *)stk;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*@}*/
|