📄 os_cpu_a.s
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;OS_CPU_A.S
#include <avr/io.h>
#define INC_FROM_OS_CPU_ASM
#include "../AVR/os_cpu.h"
#include "../Config/os_cfg.h"
;*************************************************************************************************************
;OS_EXT INT8U OSIntNesting; /* Interrupt nesting level */
;OS_EXT BOOLEAN OSRunning; /* Flag indicating that kernel is running */
;OS_EXT INT8U OSPrioCur; /* Priority of current task */
;OS_EXT INT8U OSPrioHighRdy; /* Priority of highest priority task */
;OS_EXT OS_TCB *OSTCBCur; /* Pointer to currently running TCB */
;OS_EXT OS_TCB *OSTCBHighRdy; /* Pointer to highest priority TCB R-to-R */
.extern OSTCBCur
.extern OSTCBHighRdy
.extern OSPrioCur
.extern OSPrioHighRdy
.extern OSRunning
.extern OSIntNesting
;*************************************************************************************************************
.global OSStartHighRdy
.type OSStartHighRdy,#function
.section .text,"ax"
OSStartHighRdy:
#if OS_CPU_HOOKS_EN > 0
.extern OSTaskSwHook
call OSTaskSwHook
#endif
lds r16,OSRunning
inc r16
sts OSRunning,r16
lds r30,OSTCBHighRdy
lds r31,OSTCBHighRdy+1
ld r16,z+
ld r17,z
out _SFR_IO_ADDR(SPL),r16 ;
out _SFR_IO_ADDR(SPH),r17 ;
pop r0
out _SFR_IO_ADDR(SREG),r0 ;
pop r0
pop r1
pop r2
pop r3
pop r4
pop r5
pop r6
pop r7
pop r8
pop r9
pop r10
pop r11
pop r12
pop r13
pop r14
pop r15
pop r16
pop r17
pop r18
pop r19
pop r20
pop r21
pop r22
pop r23
pop r24
pop r25
pop r26
pop r27
pop r28
pop r29
pop r30
pop r31
ret
;*************************************************************************************************************
.global OSCtxSw
.type OSCtxSw,#function
.section .text,"ax"
OSCtxSw:
push r31
push r30
push r29
push r28
push r27
push r26
push r25
push r24
push r23
push r22
push r21
push r20
push r19
push r18
push r17
push r16
push r15
push r14
push r13
push r12
push r11
push r10
push r9
push r8
push r7
push r6
push r5
push r4
push r3
push r2
push r1
push r0
in r0,_SFR_IO_ADDR(SREG)
push r0
in r16,_SFR_IO_ADDR(SPL)
in r17,_SFR_IO_ADDR(SPH)
lds r30,OSTCBCur
lds r31,OSTCBCur+1
st z+,r16
st z,r17
#if OS_CPU_HOOKS_EN > 0
.extern OSTaskSwHook
call OSTaskSwHook
#endif
lds r16,OSTCBHighRdy
lds r17,OSTCBHighRdy+1
sts OSTCBCur,r16
sts OSTCBCur+1,r17
lds r16,OSPrioHighRdy
sts OSPrioCur,r16
lds r30,OSTCBHighRdy
lds r31,OSTCBHighRdy+1
ld r16,z+
ld r17,z
out _SFR_IO_ADDR(SPL),r16 ;
out _SFR_IO_ADDR(SPH),r17 ;
pop r0
out _SFR_IO_ADDR(SREG),r0 ;
pop r0
pop r1
pop r2
pop r3
pop r4
pop r5
pop r6
pop r7
pop r8
pop r9
pop r10
pop r11
pop r12
pop r13
pop r14
pop r15
pop r16
pop r17
pop r18
pop r19
pop r20
pop r21
pop r22
pop r23
pop r24
pop r25
pop r26
pop r27
pop r28
pop r29
pop r30
pop r31
ret
;*************************************************************************************************************
.global OSIntCtxSw
.type OSIntCtxSw,#function
.section .text,"ax"
OSIntCtxSw:
in r24,_SFR_IO_ADDR(SPL)
in r25,_SFR_IO_ADDR(SPH)
adiw r24,4
#if OS_CRITICAL_METHOD == 2
adiw r24,1
#endif
#if OS_CRITICAL_METHOD == 3
adiw r24,1
#endif
out _SFR_IO_ADDR(SPL),r24
out _SFR_IO_ADDR(SPH),r25
lds r30,OSTCBCur
lds r31,OSTCBCur+1
st z+,r24
st z,r25
#if OS_CPU_HOOKS_EN > 0
.extern OSTaskSwHook
call OSTaskSwHook
#endif
lds r16,OSTCBHighRdy
lds r17,OSTCBHighRdy+1
sts OSTCBCur,r16
sts OSTCBCur+1,r17
lds r16,OSPrioHighRdy
sts OSPrioCur,r16
lds r30,OSTCBHighRdy
lds r31,OSTCBHighRdy+1
ld r16,z+
ld r17,z
out _SFR_IO_ADDR(SPL),r16 ;
out _SFR_IO_ADDR(SPH),r17 ;
pop r0
out _SFR_IO_ADDR(SREG),r0 ;
pop r0
pop r1
pop r2
pop r3
pop r4
pop r5
pop r6
pop r7
pop r8
pop r9
pop r10
pop r11
pop r12
pop r13
pop r14
pop r15
pop r16
pop r17
pop r18
pop r19
pop r20
pop r21
pop r22
pop r23
pop r24
pop r25
pop r26
pop r27
pop r28
pop r29
pop r30
pop r31
ret
;*************************************************************************************************************
.extern OSTimeTick
.extern OSIntExit
.global OSTickISR
.global SIG_OUTPUT_COMPARE0
SIG_OUTPUT_COMPARE0:
OSTickISR:
push r31
push r30
push r29
push r28
push r27
push r26
push r25
push r24
push r23
push r22
push r21
push r20
push r19
push r18
push r17
push r16
push r15
push r14
push r13
push r12
push r11
push r10
push r9
push r8
push r7
push r6
push r5
push r4
push r3
push r2
push r1
push r0
in r16,_SFR_IO_ADDR(SREG)
ori r16,0x80
push r16
lds r16,OSIntNesting
inc r16
sts OSIntNesting,r16
call OSTimeTick
call OSIntExit
pop r0
out _SFR_IO_ADDR(SREG),r0 ;
pop r0
pop r1
pop r2
pop r3
pop r4
pop r5
pop r6
pop r7
pop r8
pop r9
pop r10
pop r11
pop r12
pop r13
pop r14
pop r15
pop r16
pop r17
pop r18
pop r19
pop r20
pop r21
pop r22
pop r23
pop r24
pop r25
pop r26
pop r27
pop r28
pop r29
pop r30
pop r31
reti
;*************************************************************************************************************
.global PushSREG
PushSREG:
in r0,_SFR_IO_ADDR(SREG)
push r0
ret
.global PopSreg
PopSREG:
pop r0
out _SFR_IO_ADDR(SREG),r0
ret
.end
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