diff options
Diffstat (limited to 'libcpu')
| -rw-r--r-- | libcpu/arm/stm32/context_gcc.S | 74 |
1 files changed, 37 insertions, 37 deletions
diff --git a/libcpu/arm/stm32/context_gcc.S b/libcpu/arm/stm32/context_gcc.S index 7124e77c44..9c8cc96f6f 100644 --- a/libcpu/arm/stm32/context_gcc.S +++ b/libcpu/arm/stm32/context_gcc.S @@ -74,10 +74,10 @@ _reswitch: LDR r2, =rt_interrupt_to_thread /* set rt_interrupt_to_thread */
STR r1, [r2]
- LDR r0, =NVIC_INT_CTRL /* trigger the PendSV exception (causes context switch) */
- LDR r1, =NVIC_PENDSVSET
- STR r1, [r0]
- BX LR
+ LDR r0, =NVIC_INT_CTRL /* trigger the PendSV exception (causes context switch) */
+ LDR r1, =NVIC_PENDSVSET
+ STR r1, [r0]
+ BX LR
/* r0 --> swith from thread stack
* r1 --> swith to thread stack
@@ -87,41 +87,41 @@ _reswitch: .type rt_hw_pend_sv, %function
rt_hw_pend_sv:
/* disable interrupt to protect context switch */
- MRS r2, PRIMASK
+ MRS r2, PRIMASK
CPSID I
/* get rt_thread_switch_interrupt_flag */
- LDR r0, =rt_thread_switch_interrput_flag
- LDR r1, [r0]
- CBZ r1, pendsv_exit /* pendsv already handled */
+ LDR r0, =rt_thread_switch_interrput_flag
+ LDR r1, [r0]
+ CBZ r1, pendsv_exit /* pendsv already handled */
/* clear rt_thread_switch_interrput_flag to 0 */
- MOV r1, #0x00
- STR r1, [r0]
+ MOV r1, #0x00
+ STR r1, [r0]
- LDR r0, =rt_interrupt_from_thread
- LDR r1, [r0]
- CBZ r1, swtich_to_thread /* skip register save at the first time */
+ LDR r0, =rt_interrupt_from_thread
+ LDR r1, [r0]
+ CBZ r1, swtich_to_thread /* skip register save at the first time */
- MRS r1, psp /* get from thread stack pointer */
+ MRS r1, psp /* get from thread stack pointer */
STMFD r1!, {r4 - r11} /* push r4 - r11 register */
- LDR r0, [r0]
- STR r1, [r0] /* update from thread stack pointer */
+ LDR r0, [r0]
+ STR r1, [r0] /* update from thread stack pointer */
swtich_to_thread:
- LDR r1, =rt_interrupt_to_thread
- LDR r1, [r1]
- LDR r1, [r1] /* load thread stack pointer */
+ LDR r1, =rt_interrupt_to_thread
+ LDR r1, [r1]
+ LDR r1, [r1] /* load thread stack pointer */
LDMFD r1!, {r4 - r11} /* pop r4 - r11 register */
- MSR psp, r1 /* update stack pointer */
+ MSR psp, r1 /* update stack pointer */
pendsv_exit:
/* restore interrupt */
- MSR PRIMASK, r2
+ MSR PRIMASK, r2
- ORR lr, lr, #0x04
- BX lr
+ ORR lr, lr, #0x04
+ BX lr
/*
* void rt_hw_context_switch_to(rt_uint32 to);
@@ -130,13 +130,13 @@ pendsv_exit: .global rt_hw_context_switch_to
.type rt_hw_context_switch_to, %function
rt_hw_context_switch_to:
- LDR r1, =rt_interrupt_to_thread
- STR r0, [r1]
+ LDR r1, =rt_interrupt_to_thread
+ STR r0, [r1]
/* set from thread to 0 */
- LDR r1, =rt_interrupt_from_thread
- MOV r0, #0x0
- STR r0, [r1]
+ LDR r1, =rt_interrupt_from_thread
+ MOV r0, #0x0
+ STR r0, [r1]
/* set interrupt flag to 1 */
LDR r1, =rt_thread_switch_interrput_flag
@@ -144,15 +144,15 @@ rt_hw_context_switch_to: STR r0, [r1]
/* set the PendSV exception priority */
- LDR r0, =NVIC_SYSPRI2
- LDR r1, =NVIC_PENDSV_PRI
- LDR.W r2, [r0,#0x00] ; read
- ORR r1,r1,r2 ; modify
- STR r1, [r0] ; write-back
+ LDR r0, =NVIC_SYSPRI2
+ LDR r1, =NVIC_PENDSV_PRI
+ LDR.W r2, [r0,#0x00] /* read */
+ ORR r1,r1,r2 /* modify */
+ STR r1, [r0] /* write-back */
- LDR r0, =NVIC_INT_CTRL /* trigger the PendSV exception (causes context switch) */
- LDR r1, =NVIC_PENDSVSET
- STR r1, [r0]
+ LDR r0, =NVIC_INT_CTRL /* trigger the PendSV exception (causes context switch) */
+ LDR r1, =NVIC_PENDSVSET
+ STR r1, [r0]
CPSIE I /* enable interrupts at processor level */
@@ -162,5 +162,5 @@ rt_hw_context_switch_to: .global rt_hw_interrupt_thread_switch
.type rt_hw_interrupt_thread_switch, %function
rt_hw_interrupt_thread_switch:
- BX lr
+ BX lr
NOP
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