diff options
Diffstat (limited to 'kernel/task/mcu/atmega2560/include/mcu/task/context.h')
| -rw-r--r-- | kernel/task/mcu/atmega2560/include/mcu/task/context.h | 26 |
1 files changed, 3 insertions, 23 deletions
diff --git a/kernel/task/mcu/atmega2560/include/mcu/task/context.h b/kernel/task/mcu/atmega2560/include/mcu/task/context.h index b717991..0de1fb4 100644 --- a/kernel/task/mcu/atmega2560/include/mcu/task/context.h +++ b/kernel/task/mcu/atmega2560/include/mcu/task/context.h @@ -1,5 +1,5 @@ -#ifndef CONTEXT_H -#define CONTEXT_H +#ifndef MCU_CONTEXT_H +#define MCU_CONTEXT_H #include <avr/interrupt.h> #define ret() asm volatile ( "ret" ) @@ -20,6 +20,7 @@ asm volatile ( \ "push r0 \n\t" \ "in r0, __SREG__ \n\t" \ + "cli \n\t" \ "push r0 \n\t" \ "push r1 \n\t" \ "clr r1 \n\t" \ @@ -59,12 +60,6 @@ "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" \ ) @@ -74,12 +69,6 @@ */ #define context_restore() \ 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" \ @@ -125,13 +114,4 @@ /** Initialize the given memory addresses to contain a valid, initial stackframe. */ char* stack_init(const char* const mem_low, const char* const mem_high, void (*entry)(char), char args); -/** Initialize the given memory addresses to contain a valid, initial stackframe. */ -static inline void kstack_init(void **kstack) { - //this sets the kernel stack to the default stack location - //of this mcu, namely the top (stacks of tasks will typically - //be contained in memory allocated on the head and thus should - //overflow with the kernel stack) - *kstack = (void*) SP; -} - #endif |