diff options
Diffstat (limited to 'kernel/sched/mcu')
| -rw-r--r-- | kernel/sched/mcu/atmega2560/context.c | 98 | ||||
| -rw-r--r-- | kernel/sched/mcu/atmega2560/include/mcu/sched/context.h | 121 |
2 files changed, 0 insertions, 219 deletions
diff --git a/kernel/sched/mcu/atmega2560/context.c b/kernel/sched/mcu/atmega2560/context.c deleted file mode 100644 index 10f16a9..0000000 --- a/kernel/sched/mcu/atmega2560/context.c +++ /dev/null @@ -1,98 +0,0 @@ -#include "mcu/sched/context.h" - -char* init_stack(const char* const mem_low, const char* const mem_high, void (*entry)(char), char args) { - char* sp = (char*) mem_high; - unsigned long address = (unsigned long) entry; - - // pattern for debugging purposes - *sp = (char) 0x1; - sp--; - *sp = (char) 0x2; - sp--; - *sp = (char) 0x1; - sp--; - *sp = (char) 0x2; - sp--; - - // put return address on stack - *sp = (char) ( address & (unsigned short) 0x00ff ); - sp--; - - *sp = (char) ( (address >> 8) & ( unsigned short ) 0x00ff ); - sp--; - - *sp = (char) ( (address >> 16) & ( unsigned short ) 0x00ff ); - sp--; - - // save registers - *sp = (char) 0x00; //r0 - sp--; - *sp = (char) 0x80; //SREG, enable interrupts when task starts - sp--; - *sp = ( char ) 0x00; //r1 - sp--; - *sp = ( char ) 0x00; //r2 - sp--; - *sp = ( char ) 0x00; //r3 - sp--; - *sp = ( char ) 0x00; //r4 - sp--; - *sp = ( char ) 0x00; //r5 - sp--; - *sp = ( char ) 0x00; //r6 - sp--; - *sp = ( char ) 0x00; //r7 - sp--; - *sp = ( char ) 0x00; //r8 - sp--; - *sp = ( char ) 0x00; //r9 - sp--; - *sp = ( char ) 0x00; //r10 - sp--; - *sp = ( char ) 0x00; //r11 - sp--; - *sp = ( char ) 0x00; //r12 - sp--; - *sp = ( char ) 0x00; //r13 - sp--; - *sp = ( char ) 0x00; //r14 - sp--; - *sp = ( char ) 0x00; //r15 - sp--; - *sp = ( char ) 0x00; //r16 - sp--; - *sp = ( char ) 0x00; //r17 - sp--; - *sp = ( char ) 0x00; //r18 - sp--; - *sp = ( char ) 0x00; //r19 - sp--; - *sp = ( char ) 0x00; //r20 - sp--; - *sp = ( char ) 0x00; //r21 - sp--; - *sp = ( char ) 0x00; //r22 - sp--; - *sp = ( char ) 0x00; //r23 - sp--; - - *sp = (char) ( args ); //place first argument in register 24 - sp--; - - *sp = ( char ) 0x00; //r25 - sp--; - *sp = ( char ) 0x00; //r26 - sp--; - *sp = ( char ) 0x00; //r27 - sp--; - *sp = ( char ) 0x00; //r28 - sp--; - *sp = ( char ) 0x00; //r29 - sp--; - *sp = ( char ) 0x00; //r30 - sp--; - *sp = ( char ) 0x00; //r31 - sp--; - - return sp; -} diff --git a/kernel/sched/mcu/atmega2560/include/mcu/sched/context.h b/kernel/sched/mcu/atmega2560/include/mcu/sched/context.h deleted file mode 100644 index 437e7f3..0000000 --- a/kernel/sched/mcu/atmega2560/include/mcu/sched/context.h +++ /dev/null @@ -1,121 +0,0 @@ -#ifndef CONTEXT_H -#define CONTEXT_H - -#include <avr/interrupt.h> - -/* - * The macros SAVE_CONTEXT(), RESTORE_CONTEXT() as well as the code contained in - * init_stack is adapted from the FreeRTOS kernel (http://www.freertos.org/). - * Here by copyright, credits attributed to wherever they belong. - */ - -#define SAVE_CONTEXT() \ - asm volatile ( \ - "push r0 \n\t" \ - "in r0, __SREG__ \n\t" \ - "push r0 \n\t" \ - "push r1 \n\t" \ - "clr r1 \n\t" \ - "push r2 \n\t" \ - "push r3 \n\t" \ - "push r4 \n\t" \ - "push r5 \n\t" \ - "push r6 \n\t" \ - "push r7 \n\t" \ - "push r8 \n\t" \ - "push r9 \n\t" \ - "push r10 \n\t" \ - "push r11 \n\t" \ - "push r12 \n\t" \ - "push r13 \n\t" \ - "push r14 \n\t" \ - "push r15 \n\t" \ - "push r16 \n\t" \ - "push r17 \n\t" \ - "push r18 \n\t" \ - "push r19 \n\t" \ - "push r20 \n\t" \ - "push r21 \n\t" \ - "push r22 \n\t" \ - "push r23 \n\t" \ - "push r24 \n\t" \ - "push r25 \n\t" \ - "push r26 \n\t" \ - "push r27 \n\t" \ - "push r28 \n\t" \ - "push r29 \n\t" \ - "push r30 \n\t" \ - "push r31 \n\t" \ - "lds r26, current \n\t" \ - "lds r27, current +1 \n\t" \ - "in r0, __SP_L__ \n\t" \ - "st x+, r0 \n\t" \ - "in r0, __SP_H__ \n\t" \ - "st x+, r0 \n\t" \ - "lds r26, kstack \n\t" \ - "lds r27, kstack + 1 \n\t" \ - "ld r28, x+ \n\t" \ - "out __SP_L__, r28 \n\t" \ - "ld r29, x+ \n\t" \ - "out __SP_H__, r29 \n\t" \ - ) - -#define RESTORE_CONTEXT() \ - asm volatile ( \ - "lds r26, kstack \n\t" \ - "lds r27, kstack +1 \n\t" \ - "in r0, __SP_L__ \n\t" \ - "st x+, r0 \n\t" \ - "in r0, __SP_H__ \n\t" \ - "st x+, r0 \n\t" \ - "lds r26, current \n\t" \ - "lds r27, current + 1 \n\t" \ - "ld r28, x+ \n\t" \ - "out __SP_L__, r28 \n\t" \ - "ld r29, x+ \n\t" \ - "out __SP_H__, r29 \n\t" \ - "pop r31 \n\t" \ - "pop r30 \n\t" \ - "pop r29 \n\t" \ - "pop r28 \n\t" \ - "pop r27 \n\t" \ - "pop r26 \n\t" \ - "pop r25 \n\t" \ - "pop r24 \n\t" \ - "pop r23 \n\t" \ - "pop r22 \n\t" \ - "pop r21 \n\t" \ - "pop r20 \n\t" \ - "pop r19 \n\t" \ - "pop r18 \n\t" \ - "pop r17 \n\t" \ - "pop r16 \n\t" \ - "pop r15 \n\t" \ - "pop r14 \n\t" \ - "pop r13 \n\t" \ - "pop r12 \n\t" \ - "pop r11 \n\t" \ - "pop r10 \n\t" \ - "pop r9 \n\t" \ - "pop r8 \n\t" \ - "pop r7 \n\t" \ - "pop r6 \n\t" \ - "pop r5 \n\t" \ - "pop r4 \n\t" \ - "pop r3 \n\t" \ - "pop r2 \n\t" \ - "pop r1 \n\t" \ - "pop r0 \n\t" \ - "out __SREG__, r0 \n\t" \ - "pop r0 \n\t" \ - ) - -char* init_stack(const char* const mem_low, const char* const mem_high, void (*entry)(char), char args); - -static inline void init_kstack(char **kstack) { - *kstack = (char*) SP; -} - -#define RETURN() asm volatile("ret"); - -#endif |