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[bsp][tms320f28379d] Add support for upward-growing stack

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This commit is contained in:
xuzhuoyi
2018-09-03 00:03:06 +08:00
parent d85981a715
commit 697a4495a6
5 changed files with 20 additions and 26 deletions
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libcpu/c28x/context.s
+5 -18
View File
@@ -86,6 +86,7 @@ _rt_hw_interrupt_enable:
.asmfunc
_rt_hw_context_switch_interrupt:
_rt_hw_context_switch:
MOV AR0, AL
; set rt_thread_switch_interrupt_flag to 1
MOVL XAR2, #_rt_thread_switch_interrupt_flag
MOVL XAR3, *XAR2
@@ -96,7 +97,7 @@ _rt_hw_context_switch:
MOVL *XAR2, XAR3
MOVL XAR2, #_rt_interrupt_from_thread ; set rt_interrupt_from_thread
MOVL *XAR2, XAR0
MOVL *XAR2, XAR0
_reswitch:
MOVL XAR2, #_rt_interrupt_to_thread ; set rt_interrupt_to_thread
@@ -162,21 +163,8 @@ switch_to_thread:
; LDMFD r1!, {r3} ; pop flag
;#endif
RT_CTX_RESTORE ; pop r4 - r11 register
;#if defined (__VFP_FP__) && !defined(__SOFTFP__)
; CMP r3, #0 ; if(flag_r3 != 0)
; VLDMIANE r1!, {d8 - d15} ; pop FPU register s16~s31
;#endif
MOV @SP, AR1 ; update stack pointer
;#if defined (__VFP_FP__) && !defined(__SOFTFP__)
; ORR lr, lr, #0x10 ; lr |= (1 << 4), clean FPCA.
; CMP r3, #0 ; if(flag_r3 != 0)
; BICNE lr, lr, #0x10 ; lr &= ~(1 << 4), set FPCA.
;#endif
MOV @SP, AR1
RT_CTX_RESTORE ; pop r4 - r11 register
rtosint_exit:
; restore interrupt
@@ -206,8 +194,7 @@ _rt_hw_get_st1:
.asmfunc
_rt_hw_context_switch_to:
MOV AR1, #_rt_interrupt_to_thread
MOV AL, *AR1
MOV AR0, AL
MOV *AR1, AL
;#if defined (__VFP_FP__) && !defined(__SOFTFP__)
; CLEAR CONTROL.FPCA
libcpu/c28x/cpuport.c
+5 -5
View File
@@ -34,6 +34,7 @@ struct exception_stack_frame
struct stack_frame
{
struct exception_stack_frame exception_stack_frame;
/* r4 ~ r11 register */
rt_uint16_t ar0h;
@@ -48,7 +49,6 @@ struct stack_frame
rt_uint32_t rpc;
struct exception_stack_frame exception_stack_frame;
};
rt_uint8_t *rt_hw_stack_init(void *tentry,
@@ -60,9 +60,9 @@ rt_uint8_t *rt_hw_stack_init(void *tentry,
rt_uint8_t *stk;
unsigned long i;
stk = stack_addr + sizeof(rt_uint32_t);
stk = (rt_uint8_t *)RT_ALIGN_DOWN((rt_uint32_t)stk, 8);
stk -= sizeof(struct stack_frame);
stk = stack_addr;
stk = (rt_uint8_t *)RT_ALIGN((rt_uint32_t)stk, 8);
//stk -= sizeof(struct stack_frame);
stack_frame = (struct stack_frame *)stk;
@@ -81,7 +81,7 @@ rt_uint8_t *rt_hw_stack_init(void *tentry,
stack_frame->exception_stack_frame.return_address = (unsigned long)tentry; /* return_address */
/* return task's current stack address */
return stk;
return stk + sizeof(struct stack_frame);
}
/**