update pic32 port
git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1478 bbd45198-f89e-11dd-88c7-29a3b14d5316
This commit is contained in:
wuyangyong
parent
3126b45da6
commit
782bdd479a
@ -1,14 +1,31 @@
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#include <p32xxxx.h>
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#include "../common/mips.inc"
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#include "../common/stackframe.h"
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.section ".text", "ax"
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.set noat
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.set noreorder
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/*
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* rt_base_t rt_hw_interrupt_disable()
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*/
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.globl rt_hw_interrupt_disable
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rt_hw_interrupt_disable:
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mfc0 v0, CP0_STATUS /* v0 = status */
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addiu v1, zero, -2 /* v1 = 0-2 = 0xFFFFFFFE */
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and v1, v0, v1 /* v1 = v0 & 0xFFFFFFFE */
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mtc0 v1, CP0_STATUS /* status = v1 */
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jr ra
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nop
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/*
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* void rt_hw_interrupt_enable(rt_base_t level)
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*/
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.globl rt_hw_interrupt_enable
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rt_hw_interrupt_enable:
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mtc0 a0, CP0_STATUS
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jr ra
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nop
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/*
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* void rt_hw_context_switch_to(rt_uint32 to)/*
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@ -16,6 +33,9 @@ rt_hw_interrupt_enable:
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*/
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.globl rt_hw_context_switch_to
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rt_hw_context_switch_to:
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lw sp, 0(a0) /* get new task stack pointer */
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RESTORE_ALL_AND_RET
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/*
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* void rt_hw_context_switch(rt_uint32 from, rt_uint32 to)
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@ -24,6 +44,13 @@ rt_hw_context_switch_to:
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*/
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.globl rt_hw_context_switch
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rt_hw_context_switch:
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mtc0 ra, CP0_EPC
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SAVE_ALL
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sw sp, 0(a0) /* store sp in preempted tasks TCB */
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lw sp, 0(a1) /* get new task stack pointer */
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RESTORE_ALL_AND_RET
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/*
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* void rt_hw_context_switch_interrupt(rt_uint32 from, rt_uint32 to)/*
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@ -33,4 +60,64 @@ rt_hw_context_switch:
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.globl rt_interrupt_to_thread
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.globl rt_hw_context_switch_interrupt
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rt_hw_context_switch_interrupt:
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la t0, rt_thread_switch_interrput_flag
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lw t1, 0(t0)
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nop
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bnez t1, _reswitch
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nop
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li t1, 0x01 /* set rt_thread_switch_interrput_flag to 1 */
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sw t1, 0(t0)
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la t0, rt_interrupt_from_thread /* set rt_interrupt_from_thread */
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sw a0, 0(t0)
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_reswitch:
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la t0, rt_interrupt_to_thread /* set rt_interrupt_to_thread */
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sw a1, 0(t0)
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/* trigger the soft exception (causes context switch) */
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mfc0 t0, CP0_CAUSE /* t0 = Cause */
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ori t0, t0, (1<<8) /* t0 |= (1<<8) */
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mtc0 t0, CP0_CAUSE /* cause = t0 */
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addiu t1, zero, -257 /* t1 = ~(1<<8) */
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and t0, t0, t1 /* t0 &= t1 */
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mtc0 t0, CP0_CAUSE /* cause = t0 */
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jr ra
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nop
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/*
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* void __ISR(_CORE_SOFTWARE_0_VECTOR, ipl2) CoreSW0Handler(void)
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*/
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.section ".text", "ax"
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.set noreorder
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.set noat
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.ent CoreSW0Handler
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.globl CoreSW0Handler
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CoreSW0Handler:
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SAVE_ALL
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/* mCS0ClearIntFlag(); */
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la t0, IFS0CLR /* t0 = IFS0CLR */
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addiu t1,zero,0x02 /* t1 = (1<<2) */
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sw t1, 0(t0) /* IFS0CLR = t1 */
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/* tol rd2 */
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lui v1,0xbf88
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addiu v0,zero,(1<<0)
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sw v0,24812(v1)
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/*
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* switch to the new thread
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*/
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la k0, rt_interrupt_from_thread
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lw k1, 0(k0)
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nop
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sw sp, 0(k1) /* store sp in preempted tasks's TCB */
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la k0, rt_interrupt_to_thread
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lw k1, 0(k0)
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nop
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lw sp, 0(k1) /* get new task's stack pointer */
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RESTORE_ALL_AND_RET
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.end CoreSW0Handler
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@ -14,3 +14,14 @@
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#include <rtthread.h>
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/**
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* @addtogroup PIC32
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*/
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/*@{*/
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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_interrput_flag;
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/*@}*/
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@ -15,10 +15,20 @@
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#include <rtthread.h>
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/**
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* @addtogroup Loogonson SoC3210
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* @addtogroup PIC32
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*/
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/*@{*/
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rt_uint32_t __attribute__((nomips16)) _get_gp(void)
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{
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rt_uint32_t result;
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// get the gp reg
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asm volatile("move %0, $28" : "=r"(result));
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return result;
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}
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/**
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* This function will initialize thread stack
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*
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@ -33,6 +43,47 @@ rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter, rt_uint8_t *stack_ad
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{
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rt_uint32_t *stk;
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/** Start at stack top */
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stk = (rt_uint32_t *)stack_addr;
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*(stk) = (rt_uint32_t) tentry; /* pc: Entry Point */
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*(--stk) = (rt_uint32_t) 0x00800000; /* c0_cause: IV=1, */
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*(--stk) = (rt_uint32_t) 0; /* c0_badvaddr */
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*(--stk) = (rt_uint32_t) 0; /* lo */
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*(--stk) = (rt_uint32_t) 0; /* hi */
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*(--stk) = (rt_uint32_t) 1; /* C0_SR: IE = En, */
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*(--stk) = (rt_uint32_t) texit; /* 31 ra */
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*(--stk) = (rt_uint32_t) 0x0000001e; /* 30 s8 */
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*(--stk) = (rt_uint32_t) stack_addr; /* 29 sp */
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*(--stk) = (rt_uint32_t) _get_gp(); /* 28 gp */
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*(--stk) = (rt_uint32_t) 0x0000001b; /* 27 k1 */
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*(--stk) = (rt_uint32_t) 0x0000001a; /* 26 k0 */
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*(--stk) = (rt_uint32_t) 0x00000019; /* 25 t9 */
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*(--stk) = (rt_uint32_t) 0x00000018; /* 24 t8 */
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*(--stk) = (rt_uint32_t) 0x00000017; /* 23 s7 */
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*(--stk) = (rt_uint32_t) 0x00000016; /* 22 s6 */
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*(--stk) = (rt_uint32_t) 0x00000015; /* 21 s5 */
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*(--stk) = (rt_uint32_t) 0x00000014; /* 20 s4 */
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*(--stk) = (rt_uint32_t) 0x00000013; /* 19 s3 */
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*(--stk) = (rt_uint32_t) 0x00000012; /* 18 s2 */
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*(--stk) = (rt_uint32_t) 0x00000011; /* 17 s1 */
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*(--stk) = (rt_uint32_t) 0x00000010; /* 16 s0 */
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*(--stk) = (rt_uint32_t) 0x0000000f; /* 15 t7 */
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*(--stk) = (rt_uint32_t) 0x0000000e; /* 14 t6 */
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*(--stk) = (rt_uint32_t) 0x0000000d; /* 13 t5 */
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*(--stk) = (rt_uint32_t) 0x0000000c; /* 12 t4 */
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*(--stk) = (rt_uint32_t) 0x0000000b; /* 11 t3 */
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*(--stk) = (rt_uint32_t) 0x0000000a; /* 10 t2 */
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*(--stk) = (rt_uint32_t) 0x00000009; /* 9 t1 */
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*(--stk) = (rt_uint32_t) 0x00000008; /* 8 t0 */
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*(--stk) = (rt_uint32_t) 0x00000007; /* 7 a3 */
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*(--stk) = (rt_uint32_t) 0x00000006; /* 6 a2 */
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*(--stk) = (rt_uint32_t) 0x00000005; /* 5 a1 */
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*(--stk) = (rt_uint32_t) parameter; /* 4 a0 */
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*(--stk) = (rt_uint32_t) 0x00000003; /* 3 v1 */
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*(--stk) = (rt_uint32_t) 0x00000002; /* 2 v0 */
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*(--stk) = (rt_uint32_t) 0x00000001; /* 1 at */
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*(--stk) = (rt_uint32_t) 0x00000000; /* 0 zero */
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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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